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From: <slitkows.ietf@gmail.com>
To: <bess@ietf.org>, <draft-ietf-bess-evpn-ipvpn-interworking@ietf.org>
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Subject: Re: [bess] WGLC and IPR poll on draft-ietf-bess-evpn-ipvpn-interworking-03
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Authors,

=20

=20

Please address the comment that have been raised during the WGLC.

I=E2=80=99ll provide my chair review soon

=20

Brgds,

=20

Stephane

=20

=20

From: BESS <bess-bounces@ietf.org <mailto:bess-bounces@ietf.org> > on =
behalf of "slitkows.ietf@gmail.com <mailto:slitkows.ietf@gmail.com> " =
<slitkows.ietf@gmail.com <mailto:slitkows.ietf@gmail.com> >
Date: Monday, November 9, 2020 at 12:20 AM
To: "bess@ietf.org <mailto:bess@ietf.org> " <bess@ietf.org =
<mailto:bess@ietf.org> >, =
"draft-ietf-bess-evpn-ipvpn-interworking@ietf.org =
<mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org> " =
<draft-ietf-bess-evpn-ipvpn-interworking@ietf.org =
<mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org> >
Subject: [bess] WGLC and IPR poll on =
draft-ietf-bess-evpn-ipvpn-interworking-03

=20

Hello WG,

=20

This email starts a three weeks Working Group Last Call on =
draft-ietf-bess-evpn-ipvpn-interworking-03 [1]. We add an additional =
week due to the upcoming IETF meeting.

=20

This poll runs until * the 30th Of  November *.

=20

We are also polling for knowledge of any undisclosed IPR that applies to =
this Document, to ensure that IPR has been disclosed in compliance with =
IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this Document please =
respond to this email and indicate whether or not you are aware of any =
relevant undisclosed IPR. The Document won't progress without answers =
from all the Authors and Contributors.=20

There is currently no IPR disclosed.

=20

If you are not listed as an Author or a Contributor, then please =
explicitly respond only if you are aware of any IPR that has not yet =
been disclosed in conformance with IETF rules.

=20

We are also polling for any existing implementation as per [2].=20

=20

Thank you,

Stephane & Matthew

=20

[1] =
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-ipvpn-interworking/=


[2] =
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw

=20

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DFR =
link=3D"#0563C1" vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'>Authors,<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Please address the comment that =
have been raised during the WGLC.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>I=E2=80=99ll provide my chair =
review soon<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Brgds,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Stephane<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:12.0pt;color:black'>From: </span></b><span =
lang=3DEN-US style=3D'font-size:12.0pt;color:black'>BESS &lt;<a =
href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on =
behalf of &quot;<a =
href=3D"mailto:slitkows.ietf@gmail.com">slitkows.ietf@gmail.com</a>&quot;=
 &lt;<a =
href=3D"mailto:slitkows.ietf@gmail.com">slitkows.ietf@gmail.com</a>&gt;<b=
r><b>Date: </b>Monday, November 9, 2020 at 12:20 AM<br><b>To: =
</b>&quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; =
&lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;, &quot;<a =
href=3D"mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org">draft-ie=
tf-bess-evpn-ipvpn-interworking@ietf.org</a>&quot; &lt;<a =
href=3D"mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org">draft-ie=
tf-bess-evpn-ipvpn-interworking@ietf.org</a>&gt;<br><b>Subject: =
</b>[bess] WGLC and IPR poll on =
draft-ietf-bess-evpn-ipvpn-interworking-03<o:p></o:p></span></p></div><di=
v><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div><p =
class=3DMsoNormal><span lang=3DEN-US>Hello WG,<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>This email starts a three weeks =
Working Group Last Call on draft-ietf-bess-evpn-ipvpn-interworking-03 =
[1]. We add an additional week due to the upcoming IETF =
meeting.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>This poll runs until * the 30<sup>th</sup> Of =
&nbsp;November *.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>We are also polling for knowledge of any =
undisclosed IPR that applies to this Document, to ensure that IPR has =
been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, =
3669 and 5378 for more details).<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>If you are listed as an Author or a Contributor of =
this Document please respond to this email and indicate whether or not =
you are aware of any relevant undisclosed IPR. The Document won't =
progress without answers from all the Authors and =
Contributors.&nbsp;<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>There is currently no IPR =
disclosed.<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t style=3D'margin-left:72.0pt'><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>If you are not listed as an Author or a =
Contributor, then please explicitly respond only if you are aware of any =
IPR that has not yet been disclosed in conformance with IETF =
rules.<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t style=3D'margin-left:72.0pt'><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>We are also polling for any existing implementation =
as per [2]. <o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>Thank you,<o:p></o:p></span></p><p =
class=3Dgmail-m-3566480992569920863gmail-m-6487177298439282362msoplaintex=
t><span lang=3DEN-US>Stephane &amp; Matthew<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>[1] <a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-ipvpn-inter=
working/">https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-ipvpn-int=
erworking/</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>[2] <a =
href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdk=
jqDpw" =
target=3D"_blank">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vP=
C4rg56SEdkjqDpw</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div></body></html>
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Subject: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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Hello,

 

This email begins a two-weeks WG adoption poll for
<http://tools.ietf.org/html/draft-skr-bess-evpn-redundant-mcast-source>
draft-skr-bess-evpn-redundant-mcast-source [1].

 

Please review the draft and post any comments to the BESS working group
list.

 

We are also polling for knowledge of any undisclosed IPR that applies to
this document, to ensure that IPR has been disclosed in compliance with IETF
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

 

If you are listed as an author or a contributor of this document, please
respond to this email and indicate whether or not you are aware of any
relevant undisclosed IPR, copying the BESS mailing list. The document will
not  progress without answers from all of the authors and contributors.

 

Currently, there are no IPR disclosures against this document.

 

If you are not listed as an author or a contributor, then please explicitly
respond only if you are aware of any IPR that has not yet been disclosed in
conformance with IETF rules.

 

This poll for adoption closes on 15th December 2020.

 

Regards,

Matthew and Stephane

 

[1]
https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-source/

 

 

 

 


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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black'>Hello,</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>This email begins a two-weeks =
WG&nbsp;adoption&nbsp;poll<span =
class=3Dapple-converted-space>&nbsp;</span>for<span =
class=3Dapple-converted-space>&nbsp;</span></span><a =
href=3D"http://tools.ietf.org/html/draft-skr-bess-evpn-redundant-mcast-so=
urce"><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Verdana",sans-serif;color:#BB0000;=
background:white;text-decoration:none'>draft-skr-bess-evpn-redundant-mcas=
t-source</span></a><span style=3D'color:black'> <span =
lang=3DEN-US>[1].</span></span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>Please review the draft and post any comments to =
the BESS working group list.</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>We are also&nbsp;polling for knowledge of any =
undisclosed IPR that applies to this document, to ensure that IPR has =
been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, =
3669 and 5378 for more details).</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>If you are listed as an author or a contributor of =
this document, please respond to this email and indicate whether or not =
you are aware of any relevant undisclosed IPR, copying the BESS mailing =
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the authors and contributors.</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
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this document.</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>If you are not listed as an author or a =
contributor, then please explicitly respond only if you are aware of any =
IPR that has not yet been disclosed in conformance with IETF =
rules.</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>This<span =
class=3Dapple-converted-space>&nbsp;</span>poll<span =
class=3Dapple-converted-space>&nbsp;</span>for&nbsp;adoption&nbsp;closes =
on 15th<span class=3Dapple-converted-space>&nbsp;</span>December =
2020.</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>Regards,</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>Matthew and Stephane</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>[1]&nbsp; </span><span lang=3DEN-GB =
style=3D'color:black'><a =
href=3D"https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mc=
ast-source/">https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redunda=
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From nobody Tue Dec  1 01:34:24 2020
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Subject: [bess] The BESS WG has placed draft-skr-bess-evpn-redundant-mcast-source in state "Call For Adoption By WG Issued"
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The BESS WG has placed draft-skr-bess-evpn-redundant-mcast-source in state
Call For Adoption By WG Issued (entered by Stephane Litkowski)

The document is available at
https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-source/



From nobody Tue Dec  1 03:07:30 2020
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-na-flags-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

        Title           : Propagation of ARP/ND Flags in EVPN
        Authors         : Jorge Rabadan
                          Senthil Sathappan
                          Kiran Nagaraj
                          Wen Lin
	Filename        : draft-ietf-bess-evpn-na-flags-09.txt
	Pages           : 11
	Date            : 2020-12-01

Abstract:
   This document defines an Extended Community that is advertised along
   with an EVPN MAC/IP Advertisement route and carries information
   relevant to the ARP/ND resolution, so that an EVPN PE implementing a
   proxy-ARP/ND or ARP/ND (on IRB interfaces) function can reply to ARP
   Requests or Neighbor Solicitations with the correct information.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-na-flags-09
https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-na-flags-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-na-flags-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-bess-evpn-na-flags@ietf.org" <draft-ietf-bess-evpn-na-flags@ietf.org>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "bess@ietf.org" <bess@ietf.org>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
Thread-Topic: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (with DISCUSS)
Thread-Index: AQHWkSEwGDZeL7bB20mb5BZTeSSaAamPERlIgAUA+YCAAAEGC4AABtiAgAACYT6AAAdLAIAAB6cugE5XDJ4=
Date: Tue, 1 Dec 2020 11:11:43 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/GydCMUVyPXfuUmQUFxByqBfT7a0>
Subject: Re: [bess] Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (with DISCUSS)
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--_000_MWHPR08MB3520A4E92B07D8B7DD45B8DBF7F40MWHPR08MB3520namp_
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Rob,

My apologies =96 I thought I had updated the draft with the agreed text bel=
ow, but I didn=92t.
We just published rev 09 which includes the agreed text in the previous ema=
ils. Hope it is okay now.

https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-bess-evpn-na-flags-09.txt

Thank you.
Jorge


From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>
Date: Monday, October 12, 2020 at 4:48 PM
To: Rob Wilton (rwilton) <rwilton@cisco.com>, The IESG <iesg@ietf.org>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org <draft-ietf-bess-evpn-na-flags@i=
etf.org>, bess-chairs@ietf.org <bess-chairs@ietf.org>, bess@ietf.org <bess@=
ietf.org>, Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Thank you Rob!
Jorge

From: Rob Wilton (rwilton) <rwilton@cisco.com>
Date: Monday, October 12, 2020 at 4:21 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>, Th=
e IESG <iesg@ietf.org>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org <draft-ietf-bess-evpn-na-flags@i=
etf.org>, bess-chairs@ietf.org <bess-chairs@ietf.org>, bess@ietf.org <bess@=
ietf.org>, Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Subject: RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Looks good to me.

Regards,
Rob


From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>
Sent: 12 October 2020 14:59
To: Rob Wilton (rwilton) <rwilton@cisco.com>; The IESG <iesg@ietf.org>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org; bess-chairs@ietf.org; bess@ietf=
.org; Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Hi Rob,

I think a SHOULD is better =96 it=92s good to align implementations, but if=
 one chooses to make a different selection, instead of the latest one, I do=
n=92t think we can=92t prevent that. At the end of the day, this is a misco=
nfiguration or a transient condition, so the functionality is not affected =
either way.

I=92ll modify it as follows, unless anyone has a strong opinion:

<snip> Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for t=
he same IP but different MAC is considered a misconfiguration or a transien=
t error condition. If this happens in the network, a PE receiving multiple =
routes (with I=3D1 for the same IP and a different MAC address) SHOULD upda=
te the IP->MAC entry with the latest received information <snip>

Let me know if you are ok with it please.
Thank you!
Jorge

From: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>
Date: Monday, October 12, 2020 at 3:46 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mail=
to:jorge.rabadan@nokia.com>>, The IESG <iesg@ietf.org<mailto:iesg@ietf.org>=
>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>
Subject: RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Hi Jorge,

In-line [RW2].

From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<ma=
ilto:jorge.rabadan@nokia.com>>
Sent: 12 October 2020 14:31
To: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>; The=
 IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org>; bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>; bess@iet=
f.org<mailto:bess@ietf.org>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nok=
ia.com<mailto:matthew.bocci@nokia.com>>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Hi Rob,

Thank you.
In-line.

From: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>
Date: Monday, October 12, 2020 at 3:18 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mail=
to:jorge.rabadan@nokia.com>>, The IESG <iesg@ietf.org<mailto:iesg@ietf.org>=
>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>
Subject: RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Hi Jorge,

Please see [RW] inline

From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<ma=
ilto:jorge.rabadan@nokia.com>>
Sent: 09 October 2020 10:30
To: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>; The=
 IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org>; bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>; bess@iet=
f.org<mailto:bess@ietf.org>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nok=
ia.com<mailto:matthew.bocci@nokia.com>>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Hi Robert,

Thank you for the review.
Please see my comments in-line with [jorge].

Jorge

From: Robert Wilton via Datatracker <noreply@ietf.org<mailto:noreply@ietf.o=
rg>>
Date: Tuesday, September 22, 2020 at 10:44 PM
To: The IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>, Bocci,=
 Matthew (Nokia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.c=
om>>
Subject: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (with=
 DISCUSS)
Robert Wilton has entered the following ballot position for
draft-ietf-bess-evpn-na-flags-06: Discuss

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Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
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The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

Hi,

Hopefully a relatively easy discuss to resolve and this might just be my
ignorance here:

Section 2 states that I flag is used for an immutable ARP/ND Binding which =
is
for a configured ARP/ND entry.

Section 3.2 Reception of the EVPN ARP/ND Extended Community, has the follow=
ing
text:

      *  Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1
         for the same IP but different MAC is considered a
         misconfiguration.

But wouldn't this scenario occur if the configured ARP/ND entry was changed=
 to
point to a new MAC address?
[jorge] well, it shouldn=92t happen. The old route should be withdrawn befo=
re the new one is advertised. I added a sentence in case it helps:
=93Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the s=
ame IP but different MAC is considered a misconfiguration. Note that if a c=
onfigured IP1->MAC1 changes to point to a new MAC address, i.e., IP1->MAC2,=
 the EVPN MAC/IP Advertisement route for IP1->MAC1 will be withdrawn before=
 the EVPN MAC/IP Advertisement route for IP1->MAC2 is advertised.=94
Would that help?
[RW]
Although I appreciate that the old route should be withdrawn, and hence thi=
s shouldn=92t happen, I=92m less convinced that this situation could never =
occur, and hence I would prefer for the specification to state what the rec=
eiver does in this scenario does occur.  I presume that the only safe actio=
n would be to update the IP->MAC binding?
Regards,
Rob
[jorge2] sure, still a misconfiguration or a transient condition. Would thi=
s address your concern? (see below) If so, I=92ll add it in the next revisi=
on along with other comments from the other reviews:
=93Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the s=
ame IP but different MAC is considered a misconfiguration. In case this mis=
configuration happens in the network, a PE receiving multiple routes (with =
I=3D1 for the same IP and different MAC) will update the IP->MAC entry with=
 the latest received information. Note that if a configured IP1->MAC1 chang=
es to point to a new MAC address, i.e., IP1->MAC2, the EVPN MAC/IP Advertis=
ement route for IP1->MAC1 will be withdrawn before the EVPN MAC/IP Advertis=
ement route for IP1->MAC2 is advertised.=94
[RW2]
Yes, I think that captures the sentiment.   Possibly, it might help to elab=
orate on the first sentence, and add RFC2119.  E.g.,
=93Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the s=
ame IP but different MAC is considered a misconfiguration or a transient er=
ror condition.  If this happens in the network, a PE receiving multiple rou=
tes (with I=3D1 for the same IP and a different MAC address) MUST* update t=
he IP->MAC entry with the latest received information.  Note that if a conf=
igured IP1->MAC1 changes to point to a new MAC address, i.e., IP1->MAC2, th=
e EVPN MAC/IP Advertisement route for IP1->MAC1 will be withdrawn before th=
e EVPN MAC/IP Advertisement route for IP1->MAC2 is advertised.=94
*, I=92m not sure whether this is a MUST or a SHOULD.  E.g., if this was a =
misconfiguration scenario, might the receiver of the message choose to damp=
en the updates?
Thanks,
Rob



Regards,
Rob






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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Rob,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">My apologies =96 I thought I had updated the draft with the agreed text b=
elow, but I didn=92t.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">We just published rev 09 which includes the agreed text in the previous e=
mails. Hope it is okay now.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><a href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-bess-evpn-na-=
flags-09.txt">https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-bess-evpn-na=
-flags-09.txt</a>
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Rabadan, Jorge (Nokia - US/Mountain View=
) &lt;jorge.rabadan@nokia.com&gt;<br>
<b>Date: </b>Monday, October 12, 2020 at 4:48 PM<br>
<b>To: </b>Rob Wilton (rwilton) &lt;rwilton@cisco.com&gt;, The IESG &lt;ies=
g@ietf.org&gt;<br>
<b>Cc: </b>draft-ietf-bess-evpn-na-flags@ietf.org &lt;draft-ietf-bess-evpn-=
na-flags@ietf.org&gt;, bess-chairs@ietf.org &lt;bess-chairs@ietf.org&gt;, b=
ess@ietf.org &lt;bess@ietf.org&gt;, Bocci, Matthew (Nokia - GB) &lt;matthew=
.bocci@nokia.com&gt;<br>
<b>Subject: </b>Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">Thank you Rob!</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">Jorge</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:72.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Rob Wilton (rwilton) &lt;rwilton@cisco.c=
om&gt;<br>
<b>Date: </b>Monday, October 12, 2020 at 4:21 PM<br>
<b>To: </b>Rabadan, Jorge (Nokia - US/Mountain View) &lt;jorge.rabadan@noki=
a.com&gt;, The IESG &lt;iesg@ietf.org&gt;<br>
<b>Cc: </b>draft-ietf-bess-evpn-na-flags@ietf.org &lt;draft-ietf-bess-evpn-=
na-flags@ietf.org&gt;, bess-chairs@ietf.org &lt;bess-chairs@ietf.org&gt;, b=
ess@ietf.org &lt;bess@ietf.org&gt;, Bocci, Matthew (Nokia - GB) &lt;matthew=
.bocci@nokia.com&gt;<br>
<b>Subject: </b>RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">Looks good to me.<o:p><=
/o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">Rob<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">&nbsp;<o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><b>From:</b> Rabadan, J=
orge (Nokia - US/Mountain View) &lt;jorge.rabadan@nokia.com&gt;
<br>
<b>Sent:</b> 12 October 2020 14:59<br>
<b>To:</b> Rob Wilton (rwilton) &lt;rwilton@cisco.com&gt;; The IESG &lt;ies=
g@ietf.org&gt;<br>
<b>Cc:</b> draft-ietf-bess-evpn-na-flags@ietf.org; bess-chairs@ietf.org; be=
ss@ietf.org; Bocci, Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;<br=
>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">Hi Rob,
</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">I think a SHOULD is better =96 it=92s good t=
o align implementations, but if one chooses to make a different selection, =
instead of the latest one, I don=92t think we
 can=92t prevent that. At the end of the day, this is a misconfiguration or=
 a transient condition, so the functionality is not affected either way.</s=
pan><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">I=92ll modify it as follows, unless anyone h=
as a strong opinion:</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><b><span style=3D"font-=
size:10.5pt;font-family:Consolas">&lt;snip&gt; Receiving multiple EVPN MAC/=
IP Advertisement routes with I=3D1 for the same IP but different MAC is con=
sidered a misconfiguration or a transient error
 condition. If this happens in the network, a PE receiving multiple routes =
(with I=3D1 for the same IP and a different MAC address) SHOULD update the =
IP-&gt;MAC entry with the latest received information &lt;snip&gt;</span></=
b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">Let me know if you are ok with it please.</s=
pan><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">Thank you!</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">Jorge</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"font-siz=
e:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Rob Wilton (rwilton) &lt;<a href=3D"mail=
to:rwilton@cisco.com">rwilton@cisco.com</a>&gt;<br>
<b>Date: </b>Monday, October 12, 2020 at 3:46 PM<br>
<b>To: </b>Rabadan, Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:=
jorge.rabadan@nokia.com">jorge.rabadan@nokia.com</a>&gt;, The IESG &lt;<a h=
ref=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt">Hi Jorge,<o:p></o:p></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt">In-line [RW2].<o:p></o=
:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt">&nbsp;<o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><b>From:</b> Rabadan, =
Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:jorge.rabadan@nokia.=
com">jorge.rabadan@nokia.com</a>&gt;
<br>
<b>Sent:</b> 12 October 2020 14:31<br>
<b>To:</b> Rob Wilton (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rw=
ilton@cisco.com</a>&gt;; The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg=
@ietf.org</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a>;
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a>; Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthe=
w.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">Hi Rob,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">Thank you.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">In-line.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Rob Wilton (rwilton) &lt;<a href=3D"mail=
to:rwilton@cisco.com">rwilton@cisco.com</a>&gt;<br>
<b>Date: </b>Monday, October 12, 2020 at 3:18 PM<br>
<b>To: </b>Rabadan, Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:=
jorge.rabadan@nokia.com">jorge.rabadan@nokia.com</a>&gt;, The IESG &lt;<a h=
ref=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt">Hi Jorge,<o:p></o:p></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt">Please see [RW] inline=
 <o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt">&nbsp;<o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><b>From:</b> Rabadan, =
Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:jorge.rabadan@nokia.=
com">jorge.rabadan@nokia.com</a>&gt;
<br>
<b>Sent:</b> 09 October 2020 10:30<br>
<b>To:</b> Rob Wilton (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rw=
ilton@cisco.com</a>&gt;; The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg=
@ietf.org</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a>;
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a>; Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthe=
w.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">Hi Robert,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">Thank you for the review.</span><o:p></o:p>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">Please see my comments in-line with [jorge]=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">Jorge</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span style=3D"font-si=
ze:10.5pt;font-family:Consolas">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:180.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">Robert Wilton via Datatracker &lt;<a hre=
f=3D"mailto:noreply@ietf.org">noreply@ietf.org</a>&gt;<br>
<b>Date: </b>Tuesday, September 22, 2020 at 10:44 PM<br>
<b>To: </b>The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&=
gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;, Bocci,=
 Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@nokia.com">matthe=
w.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06=
: (with DISCUSS)</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:180.0pt">
Robert Wilton has entered the following ballot position for<br>
draft-ietf-bess-evpn-na-flags-06: Discuss<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html">
https://www.ietf.org/iesg/statement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/"=
>https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
DISCUSS:<br>
----------------------------------------------------------------------<br>
<br>
Hi,<br>
<br>
Hopefully a relatively easy discuss to resolve and this might just be my<br=
>
ignorance here:<br>
<br>
Section 2 states that I flag is used for an immutable ARP/ND Binding which =
is<br>
for a configured ARP/ND entry.<br>
<br>
Section 3.2 Reception of the EVPN ARP/ND Extended Community, has the follow=
ing<br>
text:<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *&nbsp; Receiving multiple EVPN MAC/IP Adver=
tisement routes with I=3D1<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for the same IP but differ=
ent MAC is considered a<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; misconfiguration.<br>
<br>
But wouldn't this scenario occur if the configured ARP/ND entry was changed=
 to<br>
point to a new MAC address?<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span style=3D"font-size:10.5pt;font-family:Consolas">[jorge] well, it shou=
ldn=92t happen. The old route should be withdrawn before the new one is adv=
ertised. I added a sentence in case it helps:</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span style=3D"font-size:10.5pt;font-family:Consolas">=93Receiving multiple=
 EVPN MAC/IP Advertisement routes with I=3D1 for the same IP but different =
MAC is considered a misconfiguration.
<b>Note that if a configured IP1-&gt;MAC1 changes to point to a new MAC add=
ress, i.e., IP1-&gt;MAC2, the EVPN MAC/IP Advertisement route for IP1-&gt;M=
AC1 will be withdrawn before the EVPN MAC/IP Advertisement route for IP1-&g=
t;MAC2 is advertised.=94</b></span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span style=3D"font-size:10.5pt;font-family:Consolas">Would that help?</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><i>[RW] </i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><i>Although I appreciate that the old route should be withdrawn, and hen=
ce this shouldn=92t happen, I=92m less convinced that this situation could =
never occur, and hence I would prefer for the specification to state what t=
he receiver does in this scenario does
 occur.&nbsp; I presume that the only safe action would be to update the IP=
-&gt;MAC binding?</i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><i>Regards,<br>
Rob</i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<span style=3D"font-size:10.5pt;font-family:Consolas">[jorge2] sure, still =
a misconfiguration or a transient condition. Would this address your concer=
n? (see below) If so, I=92ll add it in the next revision along with other c=
omments from the other reviews:</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<span style=3D"font-size:10.5pt;font-family:Consolas">=93Receiving multiple=
 EVPN MAC/IP Advertisement routes with I=3D1 for the same IP but different =
MAC is considered a misconfiguration. In case this misconfiguration happens=
 in the network, a PE receiving multiple
 routes (with I=3D1 for the same IP and different MAC) will update the IP-&=
gt;MAC entry with the latest received information. Note that if a configure=
d IP1-&gt;MAC1 changes to point to a new MAC address, i.e., IP1-&gt;MAC2, t=
he EVPN MAC/IP Advertisement route for IP1-&gt;MAC1
 will be withdrawn before the EVPN MAC/IP Advertisement route for IP1-&gt;M=
AC2 is advertised.=94</span><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i>[RW2] </i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i>Yes, I think that captures the sentiment.&nbsp; &nbsp;Possibly, it mi=
ght help to elaborate on the first sentence, and add RFC2119.&nbsp; E.g.,</=
i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><span style=3D"font-size:10.5pt;font-family:Consolas">=93Receiving multi=
ple EVPN MAC/IP Advertisement routes with I=3D1 for the same IP but differe=
nt MAC is considered a misconfiguration or a transient error condition. &nb=
sp;If this happens in the network, a PE receiving
 multiple routes (with I=3D1 for the same IP and a different MAC address) M=
UST* update the IP-&gt;MAC entry with the latest received information. &nbs=
p;Note that if a configured IP1-&gt;MAC1 changes to point to a new MAC addr=
ess, i.e., IP1-&gt;MAC2, the EVPN MAC/IP Advertisement
 route for IP1-&gt;MAC1 will be withdrawn before the EVPN MAC/IP Advertisem=
ent route for IP1-&gt;MAC2 is advertised.=94</span><i>&nbsp;</i></b><o:p></=
o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i>*, I=92m not sure whether this is a MUST or a SHOULD.&nbsp; E.g., if =
this was a misconfiguration scenario, might the receiver of the message cho=
ose to dampen the updates?</i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i>Thanks,<br>
Rob</i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:180.0pt">
<br>
<br>
Regards,<br>
Rob<br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_MWHPR08MB3520A4E92B07D8B7DD45B8DBF7F40MWHPR08MB3520namp_--


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Cc: draft-ietf-bess-evpn-na-flags@ietf.org, bess-chairs@ietf.org, bess@ietf.org, Matthew Bocci <matthew.bocci@nokia.com>, matthew.bocci@nokia.com
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Subject: [bess] Robert Wilton's No Objection on draft-ietf-bess-evpn-na-flags-09: (with COMMENT)
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Robert Wilton has entered the following ballot position for
draft-ietf-bess-evpn-na-flags-09: No Objection

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email addresses included in the To and CC lines. (Feel free to cut this
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for your work on this document and resolving my discuss issue.

Regards,
Rob




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From: "Rob Wilton (rwilton)" <rwilton@cisco.com>
To: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>, The IESG <iesg@ietf.org>, Martin Vigoureux <martin.vigoureux@nokia.com>
CC: "draft-ietf-bess-evpn-na-flags@ietf.org" <draft-ietf-bess-evpn-na-flags@ietf.org>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "bess@ietf.org" <bess@ietf.org>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
Thread-Topic: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (with DISCUSS)
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Date: Tue, 1 Dec 2020 11:25:50 +0000
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Subject: Re: [bess] Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (with DISCUSS)
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Hi Jorge,

No worries.  Thanks for the update.  Discuss cleared.

Regards,
Rob


From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>
Sent: 01 December 2020 11:12
To: Rob Wilton (rwilton) <rwilton@cisco.com>; The IESG <iesg@ietf.org>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org; bess-chairs@ietf.org; bess@ietf=
.org; Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Rob,

My apologies - I thought I had updated the draft with the agreed text below=
, but I didn't.
We just published rev 09 which includes the agreed text in the previous ema=
ils. Hope it is okay now.

https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-bess-evpn-na-flags-09.txt

Thank you.
Jorge


From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<ma=
ilto:jorge.rabadan@nokia.com>>
Date: Monday, October 12, 2020 at 4:48 PM
To: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>, The=
 IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Thank you Rob!
Jorge

From: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>
Date: Monday, October 12, 2020 at 4:21 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mail=
to:jorge.rabadan@nokia.com>>, The IESG <iesg@ietf.org<mailto:iesg@ietf.org>=
>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>
Subject: RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Looks good to me.

Regards,
Rob


From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<ma=
ilto:jorge.rabadan@nokia.com>>
Sent: 12 October 2020 14:59
To: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>; The=
 IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org>; bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>; bess@iet=
f.org<mailto:bess@ietf.org>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nok=
ia.com<mailto:matthew.bocci@nokia.com>>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Hi Rob,

I think a SHOULD is better - it's good to align implementations, but if one=
 chooses to make a different selection, instead of the latest one, I don't =
think we can't prevent that. At the end of the day, this is a misconfigurat=
ion or a transient condition, so the functionality is not affected either w=
ay.

I'll modify it as follows, unless anyone has a strong opinion:

<snip> Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for t=
he same IP but different MAC is considered a misconfiguration or a transien=
t error condition. If this happens in the network, a PE receiving multiple =
routes (with I=3D1 for the same IP and a different MAC address) SHOULD upda=
te the IP->MAC entry with the latest received information <snip>

Let me know if you are ok with it please.
Thank you!
Jorge

From: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>
Date: Monday, October 12, 2020 at 3:46 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mail=
to:jorge.rabadan@nokia.com>>, The IESG <iesg@ietf.org<mailto:iesg@ietf.org>=
>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>
Subject: RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Hi Jorge,

In-line [RW2].

From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<ma=
ilto:jorge.rabadan@nokia.com>>
Sent: 12 October 2020 14:31
To: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>; The=
 IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org>; bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>; bess@iet=
f.org<mailto:bess@ietf.org>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nok=
ia.com<mailto:matthew.bocci@nokia.com>>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Hi Rob,

Thank you.
In-line.

From: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>
Date: Monday, October 12, 2020 at 3:18 PM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<mail=
to:jorge.rabadan@nokia.com>>, The IESG <iesg@ietf.org<mailto:iesg@ietf.org>=
>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>
Subject: RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)
Hi Jorge,

Please see [RW] inline

From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com<ma=
ilto:jorge.rabadan@nokia.com>>
Sent: 09 October 2020 10:30
To: Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>; The=
 IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org>; bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>; bess@iet=
f.org<mailto:bess@ietf.org>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nok=
ia.com<mailto:matthew.bocci@nokia.com>>
Subject: Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (=
with DISCUSS)

Hi Robert,

Thank you for the review.
Please see my comments in-line with [jorge].

Jorge

From: Robert Wilton via Datatracker <noreply@ietf.org<mailto:noreply@ietf.o=
rg>>
Date: Tuesday, September 22, 2020 at 10:44 PM
To: The IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
Cc: draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-bess-evpn-na-f=
lags@ietf.org> <draft-ietf-bess-evpn-na-flags@ietf.org<mailto:draft-ietf-be=
ss-evpn-na-flags@ietf.org>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.o=
rg> <bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>>, bess@ietf.org<mail=
to:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org>>, Bocci, Matthew (No=
kia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>>, Bocci,=
 Matthew (Nokia - GB) <matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.c=
om>>
Subject: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06: (with=
 DISCUSS)
Robert Wilton has entered the following ballot position for
draft-ietf-bess-evpn-na-flags-06: Discuss

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The document, along with other ballot positions, can be found here:
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----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

Hi,

Hopefully a relatively easy discuss to resolve and this might just be my
ignorance here:

Section 2 states that I flag is used for an immutable ARP/ND Binding which =
is
for a configured ARP/ND entry.

Section 3.2 Reception of the EVPN ARP/ND Extended Community, has the follow=
ing
text:

      *  Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1
         for the same IP but different MAC is considered a
         misconfiguration.

But wouldn't this scenario occur if the configured ARP/ND entry was changed=
 to
point to a new MAC address?
[jorge] well, it shouldn't happen. The old route should be withdrawn before=
 the new one is advertised. I added a sentence in case it helps:
"Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the sam=
e IP but different MAC is considered a misconfiguration. Note that if a con=
figured IP1->MAC1 changes to point to a new MAC address, i.e., IP1->MAC2, t=
he EVPN MAC/IP Advertisement route for IP1->MAC1 will be withdrawn before t=
he EVPN MAC/IP Advertisement route for IP1->MAC2 is advertised."
Would that help?
[RW]
Although I appreciate that the old route should be withdrawn, and hence thi=
s shouldn't happen, I'm less convinced that this situation could never occu=
r, and hence I would prefer for the specification to state what the receive=
r does in this scenario does occur.  I presume that the only safe action wo=
uld be to update the IP->MAC binding?
Regards,
Rob
[jorge2] sure, still a misconfiguration or a transient condition. Would thi=
s address your concern? (see below) If so, I'll add it in the next revision=
 along with other comments from the other reviews:
"Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the sam=
e IP but different MAC is considered a misconfiguration. In case this misco=
nfiguration happens in the network, a PE receiving multiple routes (with I=
=3D1 for the same IP and different MAC) will update the IP->MAC entry with =
the latest received information. Note that if a configured IP1->MAC1 change=
s to point to a new MAC address, i.e., IP1->MAC2, the EVPN MAC/IP Advertise=
ment route for IP1->MAC1 will be withdrawn before the EVPN MAC/IP Advertise=
ment route for IP1->MAC2 is advertised."
[RW2]
Yes, I think that captures the sentiment.   Possibly, it might help to elab=
orate on the first sentence, and add RFC2119.  E.g.,
"Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the sam=
e IP but different MAC is considered a misconfiguration or a transient erro=
r condition.  If this happens in the network, a PE receiving multiple route=
s (with I=3D1 for the same IP and a different MAC address) MUST* update the=
 IP->MAC entry with the latest received information.  Note that if a config=
ured IP1->MAC1 changes to point to a new MAC address, i.e., IP1->MAC2, the =
EVPN MAC/IP Advertisement route for IP1->MAC1 will be withdrawn before the =
EVPN MAC/IP Advertisement route for IP1->MAC2 is advertised."
*, I'm not sure whether this is a MUST or a SHOULD.  E.g., if this was a mi=
sconfiguration scenario, might the receiver of the message choose to dampen=
 the updates?
Thanks,
Rob



Regards,
Rob





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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Hi Jorge,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">No worrie=
s.&nbsp; Thanks for the update.&nbsp; Discuss cleared.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US">Regards,<=
br>
Rob<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:EN-US"><o:p>&nbs=
p;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> Rabadan, Jorge (Nokia - US/Mountain View) &lt;jorge.rabadan@nok=
ia.com&gt;
<br>
<b>Sent:</b> 01 December 2020 11:12<br>
<b>To:</b> Rob Wilton (rwilton) &lt;rwilton@cisco.com&gt;; The IESG &lt;ies=
g@ietf.org&gt;<br>
<b>Cc:</b> draft-ietf-bess-evpn-na-flags@ietf.org; bess-chairs@ietf.org; be=
ss@ietf.org; Bocci, Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;<br=
>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Rob,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">My apologies &#8211; I thought I had updated the draft wit=
h the agreed text below, but I didn&#8217;t.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">We just published rev 09 which includes the agreed text in=
 the previous emails. Hope it is okay now.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><a href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-iet=
f-bess-evpn-na-flags-09.txt">https://tools.ietf.org/rfcdiff?url2=3Ddraft-ie=
tf-bess-evpn-na-flags-09.txt</a>
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">From: </span=
></b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">Rabadan, J=
orge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:jorge.rabadan@nokia.c=
om">jorge.rabadan@nokia.com</a>&gt;<br>
<b>Date: </b>Monday, October 12, 2020 at 4:48 PM<br>
<b>To: </b>Rob Wilton (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rw=
ilton@cisco.com</a>&gt;, The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg=
@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">Thank you Rob!</span><span la=
ng=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">Jorge</span><span lang=3D"EN-=
US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:72.0pt">
<b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">From: </span=
></b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">Rob Wilton=
 (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rwilton@cisco.com</a>&g=
t;<br>
<b>Date: </b>Monday, October 12, 2020 at 4:21 PM<br>
<b>To: </b>Rabadan, Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:=
jorge.rabadan@nokia.com">jorge.rabadan@nokia.com</a>&gt;, The IESG &lt;<a h=
ref=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">Lo=
oks good to me.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">Re=
gards,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">Ro=
b<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><b><span lang=3D"EN-US"=
>From:</span></b><span lang=3D"EN-US"> Rabadan, Jorge (Nokia - US/Mountain =
View) &lt;<a href=3D"mailto:jorge.rabadan@nokia.com">jorge.rabadan@nokia.co=
m</a>&gt;
<br>
<b>Sent:</b> 12 October 2020 14:59<br>
<b>To:</b> Rob Wilton (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rw=
ilton@cisco.com</a>&gt;; The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg=
@ietf.org</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a>;
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a>; Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthe=
w.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">Hi Rob,
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">I think a SHOULD is better &#=
8211; it&#8217;s good to align implementations, but if one chooses to make =
a different selection, instead of the latest one, I
 don&#8217;t think we can&#8217;t prevent that. At the end of the day, this=
 is a misconfiguration or a transient condition, so the functionality is no=
t affected either way.</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">I&#8217;ll modify it as follo=
ws, unless anyone has a strong opinion:</span><span lang=3D"EN-US"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><b><span lang=3D"EN-US"=
 style=3D"font-size:10.5pt;font-family:Consolas">&lt;snip&gt; Receiving mul=
tiple EVPN MAC/IP Advertisement routes with I=3D1 for the same IP but diffe=
rent MAC is considered a misconfiguration or a transient
 error condition. If this happens in the network, a PE receiving multiple r=
outes (with I=3D1 for the same IP and a different MAC address) SHOULD updat=
e the IP-&gt;MAC entry with the latest received information &lt;snip&gt;</s=
pan></b><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">Let me know if you are ok wit=
h it please.</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">Thank you!</span><span lang=
=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">Jorge</span><span lang=3D"EN-=
US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">From: </span=
></b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">Rob Wilton=
 (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rwilton@cisco.com</a>&g=
t;<br>
<b>Date: </b>Monday, October 12, 2020 at 3:46 PM<br>
<b>To: </b>Rabadan, Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:=
jorge.rabadan@nokia.com">jorge.rabadan@nokia.com</a>&gt;, The IESG &lt;<a h=
ref=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US">H=
i Jorge,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US">&=
nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US">I=
n-line [RW2].<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US">&=
nbsp;<o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><b><span lang=3D"EN-US=
">From:</span></b><span lang=3D"EN-US"> Rabadan, Jorge (Nokia - US/Mountain=
 View) &lt;<a href=3D"mailto:jorge.rabadan@nokia.com">jorge.rabadan@nokia.c=
om</a>&gt;
<br>
<b>Sent:</b> 12 October 2020 14:31<br>
<b>To:</b> Rob Wilton (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rw=
ilton@cisco.com</a>&gt;; The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg=
@ietf.org</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a>;
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a>; Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthe=
w.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US">&=
nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">Hi Rob,</span><span lang=3D"=
EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">Thank you.</span><span lang=
=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">In-line.</span><span lang=3D=
"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:108.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">From: </span=
></b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">Rob Wilton=
 (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rwilton@cisco.com</a>&g=
t;<br>
<b>Date: </b>Monday, October 12, 2020 at 3:18 PM<br>
<b>To: </b>Rabadan, Jorge (Nokia - US/Mountain View) &lt;<a href=3D"mailto:=
jorge.rabadan@nokia.com">jorge.rabadan@nokia.com</a>&gt;, The IESG &lt;<a h=
ref=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>RE: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US">H=
i Jorge,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US">&=
nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US">P=
lease see [RW] inline
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US">&=
nbsp;<o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><b><span lang=3D"EN-US=
">From:</span></b><span lang=3D"EN-US"> Rabadan, Jorge (Nokia - US/Mountain=
 View) &lt;<a href=3D"mailto:jorge.rabadan@nokia.com">jorge.rabadan@nokia.c=
om</a>&gt;
<br>
<b>Sent:</b> 09 October 2020 10:30<br>
<b>To:</b> Rob Wilton (rwilton) &lt;<a href=3D"mailto:rwilton@cisco.com">rw=
ilton@cisco.com</a>&gt;; The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg=
@ietf.org</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a>;
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a>; Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthe=
w.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;<br>
<b>Subject:</b> Re: Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flag=
s-06: (with DISCUSS)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US">&=
nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">Hi Robert,</span><span lang=
=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">Thank you for the review.</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">Please see my comments in-li=
ne with [jorge].</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">Jorge</span><span lang=3D"EN=
-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:144.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-size:10.5pt;font-family:Consolas">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">From: </span=
></b><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:black">Robert Wil=
ton via Datatracker &lt;<a href=3D"mailto:noreply@ietf.org">noreply@ietf.or=
g</a>&gt;<br>
<b>Date: </b>Tuesday, September 22, 2020 at 10:44 PM<br>
<b>To: </b>The IESG &lt;<a href=3D"mailto:iesg@ietf.org">iesg@ietf.org</a>&=
gt;<br>
<b>Cc: </b><a href=3D"mailto:draft-ietf-bess-evpn-na-flags@ietf.org">draft-=
ietf-bess-evpn-na-flags@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-=
evpn-na-flags@ietf.org">draft-ietf-bess-evpn-na-flags@ietf.org</a>&gt;,
<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a> &lt;<a hre=
f=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<a href=
=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;, Bocci,=
 Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@nokia.com">matthe=
w.bocci@nokia.com</a>&gt;<br>
<b>Subject: </b>Robert Wilton's Discuss on draft-ietf-bess-evpn-na-flags-06=
: (with DISCUSS)</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span lang=3D"EN-US">Robert Wilton has entered the following ballot positio=
n for<br>
draft-ietf-bess-evpn-na-flags-06: Discuss<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html">
https://www.ietf.org/iesg/statement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/"=
>https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-na-flags/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
DISCUSS:<br>
----------------------------------------------------------------------<br>
<br>
Hi,<br>
<br>
Hopefully a relatively easy discuss to resolve and this might just be my<br=
>
ignorance here:<br>
<br>
Section 2 states that I flag is used for an immutable ARP/ND Binding which =
is<br>
for a configured ARP/ND entry.<br>
<br>
Section 3.2 Reception of the EVPN ARP/ND Extended Community, has the follow=
ing<br>
text:<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *&nbsp; Receiving multiple EVPN MAC/IP Adver=
tisement routes with I=3D1<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for the same IP but differ=
ent MAC is considered a<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; misconfiguration.<br>
<br>
But wouldn't this scenario occur if the configured ARP/ND entry was changed=
 to<br>
point to a new MAC address?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Consolas">[jorge=
] well, it shouldn&#8217;t happen. The old route should be withdrawn before=
 the new one is advertised. I added a sentence in case it helps:</span><spa=
n lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Consolas">&#8220=
;Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the sam=
e IP but different MAC is considered a misconfiguration.
<b>Note that if a configured IP1-&gt;MAC1 changes to point to a new MAC add=
ress, i.e., IP1-&gt;MAC2, the EVPN MAC/IP Advertisement route for IP1-&gt;M=
AC1 will be withdrawn before the EVPN MAC/IP Advertisement route for IP1-&g=
t;MAC2 is advertised.&#8221;</b></span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Consolas">Would =
that help?</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><i><span lang=3D"EN-US">[RW] </span></i></b><span lang=3D"EN-US"><o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><i><span lang=3D"EN-US">Although I appreciate that the old route should =
be withdrawn, and hence this shouldn&#8217;t happen, I&#8217;m less convinc=
ed that this situation could never occur, and hence I would prefer for the =
specification to state what the receiver does
 in this scenario does occur.&nbsp; I presume that the only safe action wou=
ld be to update the IP-&gt;MAC binding?</span></i></b><span lang=3D"EN-US">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<b><i><span lang=3D"EN-US">Regards,<br>
Rob</span></i></b><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Consolas">[jorge=
2] sure, still a misconfiguration or a transient condition. Would this addr=
ess your concern? (see below) If so, I&#8217;ll add it in the next revision=
 along with other comments from the other
 reviews:</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Consolas">&#8220=
;Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the sam=
e IP but different MAC is considered a misconfiguration. In case this misco=
nfiguration happens in the network, a PE receiving
 multiple routes (with I=3D1 for the same IP and different MAC) will update=
 the IP-&gt;MAC entry with the latest received information. Note that if a =
configured IP1-&gt;MAC1 changes to point to a new MAC address, i.e., IP1-&g=
t;MAC2, the EVPN MAC/IP Advertisement route
 for IP1-&gt;MAC1 will be withdrawn before the EVPN MAC/IP Advertisement ro=
ute for IP1-&gt;MAC2 is advertised.&#8221;</span><b><i><span lang=3D"EN-US"=
>&nbsp;</span></i></b><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i><span lang=3D"EN-US">[RW2] </span></i></b><span lang=3D"EN-US"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i><span lang=3D"EN-US">Yes, I think that captures the sentiment.&nbsp; =
&nbsp;Possibly, it might help to elaborate on the first sentence, and add R=
FC2119.&nbsp; E.g.,</span></i></b><span lang=3D"EN-US"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:Consolas">&#8=
220;Receiving multiple EVPN MAC/IP Advertisement routes with I=3D1 for the =
same IP but different MAC is considered a misconfiguration or a transient e=
rror condition. &nbsp;If this happens in the network,
 a PE receiving multiple routes (with I=3D1 for the same IP and a different=
 MAC address) MUST* update the IP-&gt;MAC entry with the latest received in=
formation. &nbsp;Note that if a configured IP1-&gt;MAC1 changes to point to=
 a new MAC address, i.e., IP1-&gt;MAC2, the EVPN
 MAC/IP Advertisement route for IP1-&gt;MAC1 will be withdrawn before the E=
VPN MAC/IP Advertisement route for IP1-&gt;MAC2 is advertised.&#8221;</span=
></b><b><i><span lang=3D"EN-US">&nbsp;</span></i></b><span lang=3D"EN-US"><=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i><span lang=3D"EN-US">*, I&#8217;m not sure whether this is a MUST or =
a SHOULD.&nbsp; E.g., if this was a misconfiguration scenario, might the re=
ceiver of the message choose to dampen the updates?</span></i></b><span lan=
g=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i><span lang=3D"EN-US">Thanks,<br>
Rob</span></i></b><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:108.0pt">
<b><i><span lang=3D"EN-US">&nbsp;</span></i></b><span lang=3D"EN-US"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:144.0pt">
<span lang=3D"EN-US"><br>
<br>
Regards,<br>
Rob<br>
<br>
<br>
<br>
<br>
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
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Subject: [bess] Last Call: <draft-ietf-bess-evpn-proxy-arp-nd-09.txt> (Operational Aspects of Proxy-ARP/ND in EVPN Networks) to Informational RFC
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The IESG has received a request from the BGP Enabled ServiceS WG (bess) to
consider the following document: - 'Operational Aspects of Proxy-ARP/ND in
EVPN Networks'
  <draft-ietf-bess-evpn-proxy-arp-nd-09.txt> as Informational RFC

The IESG plans to make a decision in the next few weeks, and solicits final
comments on this action. Please send substantive comments to the
last-call@ietf.org mailing lists by 2020-12-15. Exceptionally, comments may
be sent to iesg@ietf.org instead. In either case, please retain the beginning
of the Subject line to allow automated sorting.

Abstract


   The EVPN MAC/IP Advertisement route can optionally carry IPv4 and
   IPv6 addresses associated with a MAC address.  Remote PEs importing
   those routes in the same Broadcast Domain (BD) can use this
   information to reply locally (act as proxy) to IPv4 ARP requests and
   IPv6 Neighbor Solicitation messages (or 'unicast-forward' them to the
   owner of the MAC) and reduce/suppress the flooding produced by the
   Address Resolution procedure.  This EVPN capability is extremely
   useful in Internet Exchange Points (IXPs) and Data Centers (DCs) with
   large BDs, where the amount of ARP/ND flooded traffic causes issues
   on connected routers and CEs.  This document describes the EVPN
   Proxy-ARP/ND function augmented by the capability of the ARP/ND
   Extended Community, which together help IXPs and other operators to
   deal with the issues derived from Address Resolution in large BDs.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-proxy-arp-nd/



No IPR declarations have been submitted directly on this I-D.






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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "Suresh Basavarajappa (sureshb)" <sureshb=40cisco.com@dmarc.ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Some clarification required for draft-ietf-bess-evpn-ipvpn-interworking-03
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Subject: Re: [bess] Some clarification required for draft-ietf-bess-evpn-ipvpn-interworking-03
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Hi Suresh,

Thank you for your comments. Please see in-line.
Thanks.
Jorge

From: BESS <bess-bounces@ietf.org>
Date: Wednesday, November 18, 2020 at 9:40 PM
To: bess@ietf.org <bess@ietf.org>
Subject: [bess] Some clarification required for draft-ietf-bess-evpn-ipvpn-=
interworking-03
Hi Authors,

I have the following comments on draft-ietf-bess-evpn-ipvpn-interworking-03=
 version of the draft.
Please see below.

Thanks,
Suresh


4.1.  No-Propagation-Mode
This is the default mode of operation.
Comment:
We must not have default mode of operation which could result in loops.
So the default mode of operation must be Uniform-Propagation-mode,
and No-Propagation-Mode should be made optional.
[jorge] the default mode is compatible with the behavior of a non-upgraded =
gateway PE. We don=92t want to change the behavior automatically upon upgra=
de; but we want the operator to explicitly and consciously change it. Somet=
imes the desired behavior would be to re-initialize the path attributes whe=
n propagating.
Without the D-PATH, loops are avoided today with more manual methods, such =
us the use of site-of-origin extended communities and local policy.

--

4.3.  Aggregation of Routes and Path Attribute Propagation
   -  ISF routes that have different attributes of the following type
      codes MUST NOT be aggregated: D-PATH, LOCAL_PREF, ORIGINATOR_ID,
      CLUSTER_ID, MED or AIGP.

Comment:

The draft can add a rule on D-PATH asking for not aggregating routes
if they have a different D-PATH value. However, the draft must not talk abo=
ut
other attributes (this is out of scope of the work).
[jorge] aggregation in general may be out of scope, but the aggregation in =
the context of a different ISF SAFI is within the scope of this document. A=
faik there is no other document that specifies the interworking between ISF=
 (inter-subnet-forwarding) SAFIs.
--

5.  Route Selection Process between EVPN and other ISF SAFIs
   For a given prefix advertised in one or more non-EVPN ISF routes, the
   BGP best path selection procedure will produce a set of "non-EVPN
   best paths".  For a given prefix advertised in one or more EVPN ISF
   routes, the BGP best path selection procedure will produce a set of
   "EVPN best paths".  To support IP/EVPN interworking, it is then
   necessary to run a tie-breaking selection algorithm on the union of
   these two sets.
Comment:
The above sentence does not convey the context in which the best path is
calculated. Do you mean the following.

  For a given prefix present in one or more ISF routes, the BGP best path i=
s
  first run in the respective ISF SAFI and then again on the union of
  ISF SAFI best paths in the IP-VRF context.

[jorge] text at the beginning of section 5 should be clear, but in any case=
 in case it helps I added the following. Hopefully it helps:

<snip>  To support IP/EVPN interworking in the context of
   the same IP-VRF receiving non-EVPN and EVPN ISF routes for the same
   prefix, it is then necessary to run a tie-breaking selection
   algorithm on the union of these two sets.  <snip>


--

5.  Route Selection Process between EVPN and other ISF SAFIs
   4- Steps 1-3 could possibly leave Equal Cost Multi-Path (ECMP)
      between IP and EVPN paths.  By default, the EVPN path is
      considered (and the IP path removed from consideration).  However,
      if ECMP across ISF SAFIs is enabled by policy, and an "IP path"
      and an "EVPN path" remain at the end of step 3, both path types
      will be used.

Comment:

Referring to non-EVPN paths as IP paths is confusing since EVPN path is
also an IP path
[jorge] good point. I changed it to =93non-EVPN path=94 instead of =93IP pa=
th=94 in the context of ISF SAFIs.

--

7.  Gateway PE Procedures
   The gateway PE procedures are described as follows:
   o  A gateway PE that imports an ISF SAFI-x route to prefix P in an
      IP-VRF, MUST export P in ISF SAFI-y if:
      1.  P is installed in the IP-VRF (hence the SAFI-x route is the
          best one for P) and
      2.  PE has a BGP peer for SAFI-y (enabled for the same IP-VRF) and
      3.  Either x or y is EVPN

Comment:

This above text is unclear and possibly wrong on a couple of points:

- 1. SAFI-x route is the BGP best path for P and
[jorge] we should only propagate the best path=85 can you please clarify wh=
at you mean?

- The last point brings some ambiguity. As SAFI 1 is considered as an ISF S=
AFI,
  you have to consider all combinations of ISF at the gateway, not only
  EVPN <-> something else. The current text could be interpreted in a way t=
hat
  SAFI 1 <-> SAFI 128 route export is broken and it must not.

[jorge] the spec=92s intend was not to specify new things about SAFI 1 <-> =
128 interworking, but rather interworking between EVPN and the other ISF SA=
FIs. But I see your point, so I removed the third point and left it as:


A gateway PE that imports an ISF SAFI-x route to prefix P in an

      IP-VRF, MUST export P in ISF SAFI-y if:



      1.  P is installed in the IP-VRF (hence the SAFI-x route is the

          best one for P) and



      2.  PE has a BGP peer for SAFI-y (enabled for the same IP-VRF)


--

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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thank you for your comments. Please see in-line.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">BESS &lt;bess-bounces@ietf.org&gt;<br>
<b>Date: </b>Wednesday, November 18, 2020 at 9:40 PM<br>
<b>To: </b>bess@ietf.org &lt;bess@ietf.org&gt;<br>
<b>Subject: </b>[bess] Some clarification required for draft-ietf-bess-evpn=
-ipvpn-interworking-03<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Hi Authors,<o:p></o:p><=
/p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">I have the following co=
mments on draft-ietf-bess-evpn-ipvpn-interworking-03 version of the draft.<=
o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Please see below.<o:p><=
/o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suresh<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">4.1.&nbsp; No-Propagati=
on-Mode<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">This is the default mod=
e of operation.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Comment:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">We must not have defaul=
t mode of operation which could result in loops.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">So the default mode of =
operation must be Uniform-Propagation-mode,<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">and No-Propagation-Mode=
 should be made optional.<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">[jorge] the default mode is compatible with the behavior of a non-upgrade=
d gateway PE. We don=92t want to change the behavior automatically upon upg=
rade; but we want the operator to explicitly
 and consciously change it. Sometimes the desired behavior would be to re-i=
nitialize the path attributes when propagating.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Without the D-PATH, loops are avoided today with more manual methods, suc=
h us the use of site-of-origin extended communities and local policy.<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">--<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">4.3.&nbsp; Aggregation =
of Routes and Path Attribute Propagation<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;-&nbs=
p; ISF routes that have different attributes of the following type<o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; codes MUST NOT be aggregated: D-PATH, LOCAL_PREF, ORIGINATOR_ID,<o:=
p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; CLUSTER_ID, MED or AIGP.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Comment:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">The draft can add a rul=
e on D-PATH asking for not aggregating routes<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">if they have a differen=
t D-PATH value. However, the draft must not talk about<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">other attributes (this =
is out of scope of the work).<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">[jorge] aggregation in general may be out of scope, but the aggregation i=
n the context of a different ISF SAFI is within the scope of this document.=
 Afaik there is no other document that
 specifies the interworking between ISF (inter-subnet-forwarding) SAFIs. </=
span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">--<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">5.&nbsp; Route Selectio=
n Process between EVPN and other ISF SAFIs<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;For a=
 given prefix advertised in one or more non-EVPN ISF routes, the<o:p></o:p>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp; BGP best p=
ath selection procedure will produce a set of &quot;non-EVPN<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp; best paths=
&quot;.&nbsp; For a given prefix advertised in one or more EVPN ISF<o:p></o=
:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp; routes, th=
e BGP best path selection procedure will produce a set of<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp; &quot;EVPN=
 best paths&quot;.&nbsp; To support IP/EVPN interworking, it is then<o:p></=
o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp; necessary =
to run a tie-breaking selection algorithm on the union of<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp; these two =
sets.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Comment:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">The above sentence does=
 not convey the context in which the best path is<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">calculated. Do you mean=
 the following.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp; For a given pref=
ix present in one or more ISF routes, the BGP best path is<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp; first run in the=
 respective ISF SAFI and then again on the union of<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp; ISF SAFI best pa=
ths in the IP-VRF context.<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">[jorge] text at the beginning of section 5 should be clear, but in any ca=
se in case it helps I added the following. Hopefully it helps:<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&lt;snip&gt;&nbsp; To support IP/EVPN interwor=
king in the context of<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; the same IP-VRF receiving non-EVP=
N and EVPN ISF routes for the same<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; prefix, it is then necessary to r=
un a tie-breaking selection<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; algorithm on the union of these t=
wo sets.&nbsp; &lt;snip&gt;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">--<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">5.&nbsp; Route Selectio=
n Process between EVPN and other ISF SAFIs<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;4- St=
eps 1-3 could possibly leave Equal Cost Multi-Path (ECMP)<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; between IP and EVPN paths.&nbsp; By default, the EVPN path is<o:p><=
/o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; considered (and the IP path removed from consideration).&nbsp; Howe=
ver,<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; if ECMP across ISF SAFIs is enabled by policy, and an &quot;IP path=
&quot;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; and an &quot;EVPN path&quot; remain at the end of step 3, both path=
 types<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; will be used.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Comment:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Referring to non-EVPN p=
aths as IP paths is confusing since EVPN path is<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">also an IP path<o:p></o=
:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">[jorge] good point. I changed it to =93non-EVPN path=94 instead of =93IP =
path=94 in the context of ISF SAFIs.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">--<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">7.&nbsp; Gateway PE Pro=
cedures<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;The g=
ateway PE procedures are described as follows:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;o&nbs=
p; A gateway PE that imports an ISF SAFI-x route to prefix P in an<o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp; IP-VRF, MUST export P in ISF SAFI-y if:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;1.&nbsp; P is installed in the IP-VRF (hence the SAFI-x route =
is the<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; best one for P) and<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;2.&nbsp; PE has a BGP peer for SAFI-y (enabled for the same IP=
-VRF) and<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;3.&nbsp; Either x or y is EVPN<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Comment:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">This above text is uncl=
ear and possibly wrong on a couple of points:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">- 1. SAFI-x route is th=
e BGP best path for P and<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">[jorge] we should only propagate the best path=85 can you please clarify =
what you mean?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">- The last point brings=
 some ambiguity. As SAFI 1 is considered as an ISF SAFI,<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp; you have to cons=
ider all combinations of ISF at the gateway, not only<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp; EVPN &lt;-&gt; s=
omething else. The current text could be interpreted in a way that<o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp; SAFI 1 &lt;-&gt;=
 SAFI 128 route export is broken and it must not.<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">[jorge] the spec=92s intend was not to specify new things about SAFI 1 &l=
t;-&gt; 128 interworking, but rather interworking between EVPN and the othe=
r ISF SAFIs. But I see your point, so I removed
 the third point and left it as:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<pre><span style=3D"color:black">A gateway PE that imports an ISF SAFI-x ro=
ute to prefix P in an<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; IP-VRF, MUS=
T export P in ISF SAFI-y if:<o:p></o:p></span></pre>
<pre><span style=3D"color:black"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.&nbsp; P =
is installed in the IP-VRF (hence the SAFI-x route is the<o:p></o:p></span>=
</pre>
<pre><span style=3D"color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp; best one for P) and<o:p></o:p></span></pre>
<pre><span style=3D"color:black"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.&nbsp; PE=
 has a BGP peer for SAFI-y (enabled for the same IP-VRF)<o:p></o:p></span><=
/pre>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">--<o:p></o:p></p>
</div>
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "bess@ietf.org" <bess@ietf.org>, "draft-skr-bess-evpn-redundant-mcast-source@ietf.org" <draft-skr-bess-evpn-redundant-mcast-source@ietf.org>
Thread-Topic: WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/X0AslstwDE81zzGhwIvWXVC7e9s>
Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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As co-author I support this document for WG adoption.

I=92m not aware of any relevant IPR.

Thank you.
Jorge

From: slitkows.ietf@gmail.com <slitkows.ietf@gmail.com>
Date: Tuesday, December 1, 2020 at 10:31 AM
To: bess@ietf.org <bess@ietf.org>, draft-skr-bess-evpn-redundant-mcast-sour=
ce@ietf.org <draft-skr-bess-evpn-redundant-mcast-source@ietf.org>
Subject: WG adoption for draft-skr-bess-evpn-redundant-mcast-source
Hello,

This email begins a two-weeks WG adoption poll for draft-skr-bess-evpn-redu=
ndant-mcast-source<http://tools.ietf.org/html/draft-skr-bess-evpn-redundant=
-mcast-source> [1].

Please review the draft and post any comments to the BESS working group lis=
t.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.

Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.

This poll for adoption closes on 15th December 2020.

Regards,
Matthew and Stephane

[1]  https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-s=
ource/





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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">As co-author I support this document for WG adoption.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">I=92m not aware of any relevant IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"color:black">From: </span></b><span style=3D"color:black"=
>slitkows.ietf@gmail.com &lt;slitkows.ietf@gmail.com&gt;<br>
<b>Date: </b>Tuesday, December 1, 2020 at 10:31 AM<br>
<b>To: </b>bess@ietf.org &lt;bess@ietf.org&gt;, draft-skr-bess-evpn-redunda=
nt-mcast-source@ietf.org &lt;draft-skr-bess-evpn-redundant-mcast-source@iet=
f.org&gt;<br>
<b>Subject: </b>WG adoption for draft-skr-bess-evpn-redundant-mcast-source<=
o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">Hello,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">This email begins a two-weeks WG&nbsp;adoption&=
nbsp;poll<span class=3D"apple-converted-space">&nbsp;</span>for<span class=
=3D"apple-converted-space">&nbsp;</span></span><a href=3D"http://tools.ietf=
.org/html/draft-skr-bess-evpn-redundant-mcast-source"><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:#BB0000;backgro=
und:white;text-decoration:none">draft-skr-bess-evpn-redundant-mcast-source<=
/span></a><span style=3D"color:black">
 [1].</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Please review the draft and post any comments t=
o the BESS working group list.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">We are also&nbsp;polling for knowledge of any u=
ndisclosed IPR that applies to this document, to ensure that IPR has been d=
isclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5=
378 for more details).</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">If you are listed as an author or a contributor=
 of this document, please respond to this email and indicate whether or not=
 you are aware of any relevant undisclosed IPR, copying the BESS mailing li=
st. The document will not &nbsp;progress
 without answers from all of the authors and contributors.</span><o:p></o:p=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Currently, there are no IPR disclosures against=
 this document.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">If you are not listed as an author or a contrib=
utor, then please explicitly respond only if you are aware of any IPR that =
has not yet been disclosed in conformance with IETF rules.</span><o:p></o:p=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">This<span class=3D"apple-converted-space">&nbsp=
;</span>poll<span class=3D"apple-converted-space">&nbsp;</span>for&nbsp;ado=
ption&nbsp;closes on 15th<span class=3D"apple-converted-space">&nbsp;</span=
>December 2020.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Regards,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Matthew and Stephane</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">[1]&nbsp; </span><span lang=3D"EN-GB" style=3D"=
color:black"><a href=3D"https://datatracker.ietf.org/doc/draft-skr-bess-evp=
n-redundant-mcast-source/">https://datatracker.ietf.org/doc/draft-skr-bess-=
evpn-redundant-mcast-source/</a></span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
</div>
</body>
</html>

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Date: Tue, 1 Dec 2020 09:06:12 -0800
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: bess@ietf.org, draft-skr-bess-evpn-redundant-mcast-source@ietf.org,  slitkows.ietf@gmail.com
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Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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Yes/support

Cheers,
Jeff
On Dec 1, 2020, 1:31 AM -0800, slitkows.ietf=40gmail.com, wrote:
> Hello,
>
> This email begins a two-weeks WG=C2=A0adoption=C2=A0poll=C2=A0for=C2=A0=
draft-skr-bess-evpn-redundant-mcast-source =5B1=5D.
>
> Please review the draft and post any comments to the BESS working group=
 list.
>
> We are also=C2=A0polling for knowledge of any undisclosed IPR that appl=
ies to this document, to ensure that IPR has been disclosed in compliance=
 with IET=46 IPR rules (see R=46Cs 3979, 4879, 3669 and 5378 for more det=
ails).
>
> If you are listed as an author or a contributor of this document, pleas=
e respond to this email and indicate whether or not you are aware of any =
relevant undisclosed IPR, copying the BESS mailing list. The document wil=
l not =C2=A0progress without answers from all of the authors and contribu=
tors.
>
> Currently, there are no IPR disclosures against this document.
>
> If you are not listed as an author or a contributor, then please explic=
itly respond only if you are aware of any IPR that has not yet been discl=
osed in conformance with IET=46 rules.
>
> This=C2=A0poll=C2=A0for=C2=A0adoption=C2=A0closes on 15th=C2=A0December=
 2020.
>
> Regards,
> Matthew and Stephane
>
> =5B1=5D=C2=A0 https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redu=
ndant-mcast-source/
>
>
>
>
> =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
> BESS mailing list
> BESS=40ietf.org
> https://www.ietf.org/mailman/listinfo/bess

--5fc6780b_5675ff36_14cdc
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<html xmlns=3D=22http://www.w3.org/1999/xhtml=22>
<head>
<title></title>
</head>
<body>
<div name=3D=22messageBodySection=22>
<div dir=3D=22auto=22>Yes/support</div>
</div>
<div name=3D=22messageSignatureSection=22><br />
<div class=3D=22match=46ont=22>Cheers,
<div>Jeff</div>
</div>
</div>
<div name=3D=22messageReplySection=22>On Dec 1, 2020, 1:31 AM -0800, slit=
kows.ietf=40gmail.com, wrote:<br />
<blockquote type=3D=22cite=22 style=3D=22border-left-color: grey; border-=
left-width: thin; border-left-style: solid; margin: 5px 5px;padding-left:=
 10px;=22>
<div class=3D=22WordSection1=22>
<p class=3D=22MsoNormal=22><span lang=3D=22EN-US=22 style=3D'color:black'=
 xml:lang=3D=22EN-US=22>Hello,</span><span lang=3D=22EN-GB=22 style=3D'co=
lor:black' xml:lang=3D=22EN-GB=22></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>This email=
 begins a two-weeks WG&=23160;adoption&=23160;poll<span class=3D=22apple-=
converted-space=22>&=23160;</span>for<span class=3D=22apple-converted-spa=
ce=22>&=23160;</span></span><a href=3D=22http://tools.ietf.org/html/draft=
-skr-bess-evpn-redundant-mcast-source=22><span lang=3D=22EN-US=22 style=3D=
'font-size:10.0pt;font-family:=22Verdana=22,sans-serif;color:=23BB0000;ba=
ckground:white;text-decoration:none' xml:lang=3D=22EN-US=22>draft-skr-bes=
s-evpn-redundant-mcast-source</span></a> <span style=3D'color:black'><spa=
n lang=3D=22EN-US=22 xml:lang=3D=22EN-US=22>=5B1=5D.</span></span><span l=
ang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22></span></p=
>
<p class=3D=22MsoNormal=22><span lang=3D=22EN-US=22 style=3D'color:black'=
 xml:lang=3D=22EN-US=22>&=23160;</span><span lang=3D=22EN-GB=22 style=3D'=
color:black' xml:lang=3D=22EN-GB=22></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>Please rev=
iew the draft and post any comments to the BESS working group list.</span=
><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22></=
span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>We are als=
o&=23160;polling for knowledge of any undisclosed IPR that applies to thi=
s document, to ensure that IPR has been disclosed in compliance with IET=46=
 IPR rules (see R=46Cs 3979, 4879, 3669 and 5378 for more details).</span=
><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22></=
span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>If you are=
 listed as an author or a contributor of this document, please respond to=
 this email and indicate whether or not you are aware of any relevant und=
isclosed IPR, copying the BESS mailing list. The document will not &=2316=
0;progress without answers from all of the authors and contributors.</spa=
n><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22><=
/span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>Currently,=
 there are no IPR disclosures against this document.</span><span lang=3D=22=
EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>If you are=
 not listed as an author or a contributor, then please explicitly respond=
 only if you are aware of any IPR that has not yet been disclosed in conf=
ormance with IET=46 rules.</span><span lang=3D=22EN-GB=22 style=3D'color:=
black' xml:lang=3D=22EN-GB=22></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>This<span =
class=3D=22apple-converted-space=22>&=23160;</span>poll<span class=3D=22a=
pple-converted-space=22>&=23160;</span>for&=23160;adoption&=23160;closes =
on 15th<span class=3D=22apple-converted-space=22>&=23160;</span>December =
2020.</span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22=
EN-GB=22></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
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ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>Regards,</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
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<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>Matthew an=
d Stephane</span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=
=22EN-GB=22></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
ize-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span l=
ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>&=23160;</=
span><span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22EN-GB=22=
></span></p>
<p class=3D=22MsoNormal=22 style=3D'caret-color: rgb(0, 0, 0);font-varian=
t-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-s=
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ang=3D=22EN-US=22 style=3D'color:black' xml:lang=3D=22EN-US=22>=5B1=5D&=23=
160;</span> <span lang=3D=22EN-GB=22 style=3D'color:black' xml:lang=3D=22=
EN-GB=22><a href=3D=22https://datatracker.ietf.org/doc/draft-skr-bess-evp=
n-redundant-mcast-source/=22>https://datatracker.ietf.org/doc/draft-skr-b=
ess-evpn-redundant-mcast-source/</a></span></p>
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From: "Sathappan, Senthil (Nokia - US/Mountain View)" <senthil.sathappan@nokia.com>
To: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>, "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "bess@ietf.org" <bess@ietf.org>, "draft-skr-bess-evpn-redundant-mcast-source@ietf.org" <draft-skr-bess-evpn-redundant-mcast-source@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/wgJDl384Y5RcsG7Udn7HDxaXoFI>
Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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As co-author I support this document for WG adoption.

I'm not aware of any relevant IPR.

Thanks,
Senthil.


From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>
Sent: Tuesday, December 1, 2020 1:50 AM
To: slitkows.ietf@gmail.com; bess@ietf.org; draft-skr-bess-evpn-redundant-m=
cast-source@ietf.org
Subject: Re: WG adoption for draft-skr-bess-evpn-redundant-mcast-source

As co-author I support this document for WG adoption.

I'm not aware of any relevant IPR.

Thank you.
Jorge

From: slitkows.ietf@gmail.com<mailto:slitkows.ietf@gmail.com> <slitkows.iet=
f@gmail.com<mailto:slitkows.ietf@gmail.com>>
Date: Tuesday, December 1, 2020 at 10:31 AM
To: bess@ietf.org<mailto:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org=
>>, draft-skr-bess-evpn-redundant-mcast-source@ietf.org<mailto:draft-skr-be=
ss-evpn-redundant-mcast-source@ietf.org> <draft-skr-bess-evpn-redundant-mca=
st-source@ietf.org<mailto:draft-skr-bess-evpn-redundant-mcast-source@ietf.o=
rg>>
Subject: WG adoption for draft-skr-bess-evpn-redundant-mcast-source
Hello,

This email begins a two-weeks WG adoption poll for draft-skr-bess-evpn-redu=
ndant-mcast-source<http://tools.ietf.org/html/draft-skr-bess-evpn-redundant=
-mcast-source> [1].

Please review the draft and post any comments to the BESS working group lis=
t.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.

Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.

This poll for adoption closes on 15th December 2020.

Regards,
Matthew and Stephane

[1]  https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-s=
ource/





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<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
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<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif">I&#8217;m not aware of any relevant IPR.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif">Senthil.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt">From:</span></b>=
<span style=3D"font-size:11.0pt"> Rabadan, Jorge (Nokia - US/Mountain View)=
 &lt;jorge.rabadan@nokia.com&gt;
<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:50 AM<br>
<b>To:</b> slitkows.ietf@gmail.com; bess@ietf.org; draft-skr-bess-evpn-redu=
ndant-mcast-source@ietf.org<br>
<b>Subject:</b> Re: WG adoption for draft-skr-bess-evpn-redundant-mcast-sou=
rce<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">As co-author I support this document for WG adoption.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">I&#8217;m not aware of any relevant IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0in;margin-right:0in;mar=
gin-bottom:12.0pt;margin-left:.5in">
<b><span style=3D"color:black">From: </span></b><span style=3D"color:black"=
><a href=3D"mailto:slitkows.ietf@gmail.com">slitkows.ietf@gmail.com</a> &lt=
;<a href=3D"mailto:slitkows.ietf@gmail.com">slitkows.ietf@gmail.com</a>&gt;=
<br>
<b>Date: </b>Tuesday, December 1, 2020 at 10:31 AM<br>
<b>To: </b><a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;,
<a href=3D"mailto:draft-skr-bess-evpn-redundant-mcast-source@ietf.org">draf=
t-skr-bess-evpn-redundant-mcast-source@ietf.org</a> &lt;<a href=3D"mailto:d=
raft-skr-bess-evpn-redundant-mcast-source@ietf.org">draft-skr-bess-evpn-red=
undant-mcast-source@ietf.org</a>&gt;<br>
<b>Subject: </b>WG adoption for draft-skr-bess-evpn-redundant-mcast-source<=
o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"color:blac=
k">Hello,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">This email begins a two-weeks WG&nbsp;adoption&=
nbsp;poll<span class=3D"apple-converted-space">&nbsp;</span>for<span class=
=3D"apple-converted-space">&nbsp;</span></span><a href=3D"http://tools.ietf=
.org/html/draft-skr-bess-evpn-redundant-mcast-source"><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:#BB0000;backgro=
und:white;text-decoration:none">draft-skr-bess-evpn-redundant-mcast-source<=
/span></a><span style=3D"color:black">
 [1].</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"color:blac=
k">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Please review the draft and post any comments t=
o the BESS working group list.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">We are also&nbsp;polling for knowledge of any u=
ndisclosed IPR that applies to this document, to ensure that IPR has been d=
isclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5=
378 for more details).</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">If you are listed as an author or a contributor=
 of this document, please respond to this email and indicate whether or not=
 you are aware of any relevant undisclosed IPR, copying the BESS mailing li=
st. The document will not &nbsp;progress
 without answers from all of the authors and contributors.</span><o:p></o:p=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Currently, there are no IPR disclosures against=
 this document.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">If you are not listed as an author or a contrib=
utor, then please explicitly respond only if you are aware of any IPR that =
has not yet been disclosed in conformance with IETF rules.</span><o:p></o:p=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">This<span class=3D"apple-converted-space">&nbsp=
;</span>poll<span class=3D"apple-converted-space">&nbsp;</span>for&nbsp;ado=
ption&nbsp;closes on 15th<span class=3D"apple-converted-space">&nbsp;</span=
>December 2020.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Regards,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Matthew and Stephane</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">[1]&nbsp; </span><span lang=3D"EN-GB" style=3D"=
color:black"><a href=3D"https://datatracker.ietf.org/doc/draft-skr-bess-evp=
n-redundant-mcast-source/">https://datatracker.ietf.org/doc/draft-skr-bess-=
evpn-redundant-mcast-source/</a></span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;caret-color: rgb(0, 0, 0);=
font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webk=
it-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span lang=3D"EN-GB" styl=
e=3D"font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span lang=3D"EN-GB" styl=
e=3D"font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
</div>
</body>
</html>

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From: "Kotalwar, Jayant (Nokia - US/Mountain View)" <jayant.kotalwar@nokia.com>
To: "Sathappan, Senthil (Nokia - US/Mountain View)" <senthil.sathappan@nokia.com>, "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>, "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "bess@ietf.org" <bess@ietf.org>, "draft-skr-bess-evpn-redundant-mcast-source@ietf.org" <draft-skr-bess-evpn-redundant-mcast-source@ietf.org>
Thread-Topic: WG adoption for draft-skr-bess-evpn-redundant-mcast-source
Thread-Index: AdbHxJb4x9CwobIhR5K6FpyfoqV6AwAAoibgABEj6xAAAoII7g==
Date: Tue, 1 Dec 2020 19:11:55 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/WpnCC7W6WvoGPdUn-iYBQHKOW7o>
Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

As co-author I support this document for WG adoption.



I=92m not aware of any relevant IPR.

Thanks,
Jayant
________________________________
From: Sathappan, Senthil (Nokia - US/Mountain View) <senthil.sathappan@noki=
a.com>
Sent: Tuesday, December 1, 2020 10:00 AM
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>; sl=
itkows.ietf@gmail.com <slitkows.ietf@gmail.com>; bess@ietf.org <bess@ietf.o=
rg>; draft-skr-bess-evpn-redundant-mcast-source@ietf.org <draft-skr-bess-ev=
pn-redundant-mcast-source@ietf.org>
Subject: RE: WG adoption for draft-skr-bess-evpn-redundant-mcast-source


As co-author I support this document for WG adoption.



I=92m not aware of any relevant IPR.



Thanks,

Senthil.





From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>
Sent: Tuesday, December 1, 2020 1:50 AM
To: slitkows.ietf@gmail.com; bess@ietf.org; draft-skr-bess-evpn-redundant-m=
cast-source@ietf.org
Subject: Re: WG adoption for draft-skr-bess-evpn-redundant-mcast-source



As co-author I support this document for WG adoption.



I=92m not aware of any relevant IPR.



Thank you.

Jorge



From: slitkows.ietf@gmail.com<mailto:slitkows.ietf@gmail.com> <slitkows.iet=
f@gmail.com<mailto:slitkows.ietf@gmail.com>>
Date: Tuesday, December 1, 2020 at 10:31 AM
To: bess@ietf.org<mailto:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org=
>>, draft-skr-bess-evpn-redundant-mcast-source@ietf.org<mailto:draft-skr-be=
ss-evpn-redundant-mcast-source@ietf.org> <draft-skr-bess-evpn-redundant-mca=
st-source@ietf.org<mailto:draft-skr-bess-evpn-redundant-mcast-source@ietf.o=
rg>>
Subject: WG adoption for draft-skr-bess-evpn-redundant-mcast-source

Hello,



This email begins a two-weeks WG adoption poll for draft-skr-bess-evpn-redu=
ndant-mcast-source<http://tools.ietf.org/html/draft-skr-bess-evpn-redundant=
-mcast-source> [1].



Please review the draft and post any comments to the BESS working group lis=
t.



We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).



If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.



Currently, there are no IPR disclosures against this document.



If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.



This poll for adoption closes on 15th December 2020.



Regards,

Matthew and Stephane



[1]  https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-s=
ource/









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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 11pt; color: rgb(0, 0, 0);">
<p style=3D"color:rgb(32, 31, 30);background-color:rgb(255, 255, 255);font-=
size:12pt;font-family:Calibri, sans-serif;margin:0px">
<span style=3D"margin:0px;font-size:10pt;font-family:Verdana, sans-serif">A=
s co-author I support this document for WG adoption.</span></p>
<p style=3D"color:rgb(32, 31, 30);background-color:rgb(255, 255, 255);font-=
size:12pt;font-family:Calibri, sans-serif;margin:0px">
<span style=3D"margin:0px;font-size:10pt;font-family:Verdana, sans-serif">&=
nbsp;</span></p>
<p style=3D"color:rgb(32, 31, 30);background-color:rgb(255, 255, 255);font-=
size:12pt;font-family:Calibri, sans-serif;margin:0px">
<span style=3D"margin:0px;font-size:10pt;font-family:Verdana, sans-serif">I=
=92m not aware of any relevant IPR.</span></p>
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 11pt; color: rgb(0, 0, 0);">
Thanks,</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 11pt; color: rgb(0, 0, 0);">
Jayant</div>
<div id=3D"appendonsend"></div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" st=
yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Sathappan, Senthil (N=
okia - US/Mountain View) &lt;senthil.sathappan@nokia.com&gt;<br>
<b>Sent:</b> Tuesday, December 1, 2020 10:00 AM<br>
<b>To:</b> Rabadan, Jorge (Nokia - US/Mountain View) &lt;jorge.rabadan@noki=
a.com&gt;; slitkows.ietf@gmail.com &lt;slitkows.ietf@gmail.com&gt;; bess@ie=
tf.org &lt;bess@ietf.org&gt;; draft-skr-bess-evpn-redundant-mcast-source@ie=
tf.org &lt;draft-skr-bess-evpn-redundant-mcast-source@ietf.org&gt;<br>
<b>Subject:</b> RE: WG adoption for draft-skr-bess-evpn-redundant-mcast-sou=
rce</font>
<div>&nbsp;</div>
</div>
<style>
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<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"purple" style=3D"word-wrap:br=
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<div class=3D"x_WordSection1">
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif">As co-author I support this document for WG adop=
tion.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif">I=92m not aware of any relevant IPR.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif">Thanks,</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif">Senthil.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot=
;Verdana&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<div>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"x_MsoNormal"><b><span style=3D"font-size:11.0pt">From:</span></=
b><span style=3D"font-size:11.0pt"> Rabadan, Jorge (Nokia - US/Mountain Vie=
w) &lt;jorge.rabadan@nokia.com&gt;
<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:50 AM<br>
<b>To:</b> slitkows.ietf@gmail.com; bess@ietf.org; draft-skr-bess-evpn-redu=
ndant-mcast-source@ietf.org<br>
<b>Subject:</b> Re: WG adoption for draft-skr-bess-evpn-redundant-mcast-sou=
rce</span></p>
</div>
</div>
<p class=3D"x_MsoNormal">&nbsp;</p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">As co-author I support this document for WG adoption.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">I=92m not aware of any relevant IPR.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">&nbsp;</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">Thank you.</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">Jorge</span></p>
<p class=3D"x_MsoNormal"><span style=3D"font-size:10.5pt; font-family:Conso=
las">&nbsp;</span></p>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"x_MsoNormal" style=3D"margin-right:0in; margin-bottom:12.0pt; m=
argin-left:.5in">
<b><span style=3D"color:black">From: </span></b><span style=3D"color:black"=
><a href=3D"mailto:slitkows.ietf@gmail.com">slitkows.ietf@gmail.com</a> &lt=
;<a href=3D"mailto:slitkows.ietf@gmail.com">slitkows.ietf@gmail.com</a>&gt;=
<br>
<b>Date: </b>Tuesday, December 1, 2020 at 10:31 AM<br>
<b>To: </b><a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;,
<a href=3D"mailto:draft-skr-bess-evpn-redundant-mcast-source@ietf.org">draf=
t-skr-bess-evpn-redundant-mcast-source@ietf.org</a> &lt;<a href=3D"mailto:d=
raft-skr-bess-evpn-redundant-mcast-source@ietf.org">draft-skr-bess-evpn-red=
undant-mcast-source@ietf.org</a>&gt;<br>
<b>Subject: </b>WG adoption for draft-skr-bess-evpn-redundant-mcast-source<=
/span></p>
</div>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in"><span style=3D"color:bl=
ack">Hello,</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">This email begins a two-weeks WG&nbsp;adoption&=
nbsp;poll<span class=3D"x_apple-converted-space">&nbsp;</span>for<span clas=
s=3D"x_apple-converted-space">&nbsp;</span></span><a href=3D"http://tools.i=
etf.org/html/draft-skr-bess-evpn-redundant-mcast-source"><span style=3D"fon=
t-size:10.0pt; font-family:&quot;Verdana&quot;,sans-serif; color:#BB0000; b=
ackground:white; text-decoration:none">draft-skr-bess-evpn-redundant-mcast-=
source</span></a><span style=3D"color:black">
 [1].</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in"><span style=3D"color:bl=
ack">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">Please review the draft and post any comments t=
o the BESS working group list.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">We are also&nbsp;polling for knowledge of any u=
ndisclosed IPR that applies to this document, to ensure that IPR has been d=
isclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5=
378 for more details).</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">If you are listed as an author or a contributor=
 of this document, please respond to this email and indicate whether or not=
 you are aware of any relevant undisclosed IPR, copying the BESS mailing li=
st. The document will not &nbsp;progress
 without answers from all of the authors and contributors.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">Currently, there are no IPR disclosures against=
 this document.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">If you are not listed as an author or a contrib=
utor, then please explicitly respond only if you are aware of any IPR that =
has not yet been disclosed in conformance with IETF rules.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">This<span class=3D"x_apple-converted-space">&nb=
sp;</span>poll<span class=3D"x_apple-converted-space">&nbsp;</span>for&nbsp=
;adoption&nbsp;closes on 15th<span class=3D"x_apple-converted-space">&nbsp;=
</span>December 2020.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">Regards,</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">Matthew and Stephane</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">[1]&nbsp; </span><span lang=3D"EN-GB" style=3D"=
color:black"><a href=3D"https://datatracker.ietf.org/doc/draft-skr-bess-evp=
n-redundant-mcast-source/">https://datatracker.ietf.org/doc/draft-skr-bess-=
evpn-redundant-mcast-source/</a></span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in; font-variant-caps:norma=
l; orphans:auto; text-align:start; widows:auto; word-spacing:0px">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin-left:.5in"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span></p>
</div>
</div>
</body>
</html>

--_000_DM6PR08MB519457E3D8BC1B9523F80960E9F40DM6PR08MB5194namp_--


From nobody Tue Dec  1 19:05:14 2020
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Subject: [bess] Secdir telechat review of draft-ietf-bess-mvpn-fast-failover-13
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Reviewer: Daniel Migault
Review result: Ready

I reviewed this document as part of the Security Directorate's ongoing effort to
review all IETF documents being processed by the IESG.  These comments were
written primarily for the benefit of the Security Area Directors.  Document
authors, document editors, and WG chairs should treat these comments just like
any other IETF Last Call comments.  Please note also that my expertise in BGP is
limited, so feel free to take these comments with a pitch of salt. 

Review Results: Ready

My comments of version 11 have been addressed.

Yours,
Daniel



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Subject: Re: [bess] Secdir telechat review of draft-ietf-bess-mvpn-fast-failover-13
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--0000000000005483d705b5728e96
Content-Type: text/plain; charset="UTF-8"

Hi Daniel,
thank you for the review and your thoughtful comments that helped to
improve the document.

Regards,
Greg

On Tue, Dec 1, 2020 at 7:06 PM Daniel Migault via Datatracker <
noreply@ietf.org> wrote:

> Reviewer: Daniel Migault
> Review result: Ready
>
> I reviewed this document as part of the Security Directorate's ongoing
> effort to
> review all IETF documents being processed by the IESG.  These comments were
> written primarily for the benefit of the Security Area Directors.  Document
> authors, document editors, and WG chairs should treat these comments just
> like
> any other IETF Last Call comments.  Please note also that my expertise in
> BGP is
> limited, so feel free to take these comments with a pitch of salt.
>
> Review Results: Ready
>
> My comments of version 11 have been addressed.
>
> Yours,
> Daniel
>
>
>

--0000000000005483d705b5728e96
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Daniel,<div>thank you for the review and your thoughtfu=
l comments that helped to improve the document.</div><div><br></div><div>Re=
gards,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D=
"ltr" class=3D"gmail_attr">On Tue, Dec 1, 2020 at 7:06 PM Daniel Migault vi=
a Datatracker &lt;<a href=3D"mailto:noreply@ietf.org">noreply@ietf.org</a>&=
gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Revie=
wer: Daniel Migault<br>
Review result: Ready<br>
<br>
I reviewed this document as part of the Security Directorate&#39;s ongoing =
effort to<br>
review all IETF documents being processed by the IESG.=C2=A0 These comments=
 were<br>
written primarily for the benefit of the Security Area Directors.=C2=A0 Doc=
ument<br>
authors, document editors, and WG chairs should treat these comments just l=
ike<br>
any other IETF Last Call comments.=C2=A0 Please note also that my expertise=
 in BGP is<br>
limited, so feel free to take these comments with a pitch of salt. <br>
<br>
Review Results: Ready<br>
<br>
My comments of version 11 have been addressed.<br>
<br>
Yours,<br>
Daniel<br>
<br>
<br>
</blockquote></div>

--0000000000005483d705b5728e96--


From nobody Wed Dec  2 10:07:15 2020
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Subject: [bess] I-D Action: draft-ietf-bess-mvpn-evpn-sr-p2mp-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

        Title           : Multicast and Ethernet VPN with Segment Routing Point-to-Multipoint Trees
        Authors         : Rishabh Parekh
                          Clarence Filsfils
                          Arvind Venkateswaran
                          Hooman Bidgoli
                          Daniel Voyer
                          Zhaohui Zhang
	Filename        : draft-ietf-bess-mvpn-evpn-sr-p2mp-01.txt
	Pages           : 15
	Date            : 2020-12-02

Abstract:
   A Point-to-Multipoint (P2MP) Tree in a Segment Routing domain
   efficiently carries traffic from a Root to a set of Leaves.  This
   document describes extensions to BGP encodings and procedures for
   P2MP trees used in BGP/MPLS IP VPNs and Ethernet VPNs.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-sr-p2mp/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-mvpn-evpn-sr-p2mp-01
https://datatracker.ietf.org/doc/html/draft-ietf-bess-mvpn-evpn-sr-p2mp-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-mvpn-evpn-sr-p2mp-01


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



From nobody Wed Dec  2 16:55:41 2020
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From: Zhuangshunwan <zhuangshunwan@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Matthew, Stephane and WG,

I'm not aware of any relevant IPR.
As a co-author, I support publishing this draft as a standards track RFC.
I know that there are many implementations and interoperability tests that =
have already been listed in the document: https://tools.ietf.org/id/draft-m=
atsushima-spring-srv6-deployment-status-09.txt

Regards,
--Shunwan

From: Bocci, Matthew (Nokia - GB) [mailto:matthew.bocci@nokia.com]
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Matthew, Stephane and WG,<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I&#8217;m not aware of any relevant IP=
R.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">As a co-author, I support publishing t=
his draft as a standards track RFC.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I know that there are many implementat=
ions and interoperability tests that have already been listed in the docume=
nt: https://tools.ietf.org/id/draft-matsushima-spring-srv6-deployment-statu=
s-09.txt<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">--Shunwan<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> Bocci, Matthew (Nokia - GB) [mai=
lto:matthew.bocci@nokia.com]
<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servi=
ces/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"E=
N-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
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From: "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Thu, 3 Dec 2020 03:42:58 +0000
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Dear authors and all,



 I find the following changes in the new version, which may cause incompati=
ble changes in the implemented version.
[cid:image001.png@01D6C95C.F862B140]


The label field described in RFC4364:

4.3.4. How VPN-IPv4 NLRI Is Carried in BGP

   The labeled VPN-IPv4 NLRI itself is encoded as specified in

   [MPLS-BGP<https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP>], where the =
prefix consists of an 8-byte RD followed by an

   IPv4 prefix.


 RFC 3107 describe the label field:

3. Carrying Label Mapping Information

      b) Label:



         The Label field carries one or more labels (that corresponds to

         the stack of labels [MPLS-ENCAPS<https://tools.ietf.org/html/rfc31=
07#ref-MPLS-ENCAPS>]).  Each label is encoded as 3

         octets, where the high-order 20 bits contain the label value,

         and the low order bit contains "Bottom of Stack" (as defined in

         [MPLS-ENCAPS<https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS>]=
).


According to the definition, the label field in RFC 4364 should be 3 bytes,=
  but only 20 bits are used as the label value. So we may also use the enti=
re 3 octets.

On the other hand,  if only 20 bits are used, do we need to add the BoS fla=
g to the part when do the transposition?



Best Regards,

Haibo

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<body lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">=
Dear authors and all,<o:p></o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif"> I find the following changes in the new versi=
on, which may cause incompatible changes in the implemented version.<o:p></=
o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-f=
areast-language:ZH-CN"><img width=3D"1316" height=3D"73" id=3D"_x56fe__x724=
7__x0020_1" src=3D"cid:image001.png@01D6C95C.F862B140" alt=3D"cid:image001.=
png@01D6C95C.F862B140"></span><span lang=3D"EN-US" style=3D"font-size:10.5p=
t;color:#1F497D;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">The label field described in RFC4364:</span><s=
pan lang=3D"EN-US" style=3D"font-family:&quot;Calibri&quot;,sans-serif"><o:=
p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">4.3.4. How VP=
N-IPv4 NLRI Is Carried in BGP<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">&nbsp;&nbsp; The la=
beled VPN-IPv4 NLRI itself is encoded as specified in<o:p></o:p></span></pr=
e>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">&nbsp;&nbsp; [<a hr=
ef=3D"https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP" title=3D"&quot;Carr=
ying Label Information in BGP-4&quot;"><span style=3D"color:windowtext">MPL=
S-BGP</span></a>], where the prefix consists of an 8-byte RD followed by an=
<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">&nbsp;&nbsp; IPv4 p=
refix.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif"> RFC 3107 describe the label field:<o:p></o:p>=
</span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">3. Carrying L=
abel Mapping Information<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp; b) Label:<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040"><o:p>=
&nbsp;</o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The Label field carries one or =
more labels (that corresponds to<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the stack of labels [<a href=3D=
"https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS L=
abel Stack Encoding&quot;">MPLS-ENCAPS</a>]).&nbsp; <b>Each label is encode=
d as 3<o:p></o:p></b></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><b><span lang=
=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; octets,</span></b><span lan=
g=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">=
 where the high-order 20 bits contain the label value,<o:p></o:p></span></p=
re>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and the low order bit contains =
&quot;Bottom of Stack&quot; (as defined in<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<a href=3D"https://tools.ietf.=
org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS Label Stack Encoding&=
quot;">MPLS-ENCAPS</a>]).<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">According to the definition, the label field i=
n RFC 4364 should be 3 bytes, &nbsp;but only 20 bits are used as the label =
value. So we may also use the entire 3 octets. <o:p></o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">On the other hand, &nbsp;if only 20 bits are u=
sed, do we need to add the BoS flag to the part when do the transposition?<=
o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529">Best Regards,<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529">Haibo<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
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Hi Chairs,

I=E2=80=99m not aware of non-disclosed IPR.

As a co-author and editor, I support publishing this draft as a standards tr=
ack RFC.

Gaurav
LinkedIn


> On Nov 30, 2020, at 9:15 AM, Bocci, Matthew (Nokia - GB) <matthew.bocci@no=
kia.com> wrote:
>=20
> =EF=BB=BF
> This email starts a two-week working group last call for draft-ietf-bess-s=
rv6-services-05 [1]
> =20
> Please review the draft and send any comments to the BESS list. Also, plea=
se indicate if you support publishing the draft as a standards track RFC.
> =20
> This poll runs until Monday 14th December 2020.
> =20
> We are also polling for knowledge of any undisclosed IPR that applies to t=
his Document, to ensure that IPR has been disclosed in compliance with IETF I=
PR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
> =20
> If you are listed as an Author or a Contributor of this document please re=
spond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the A=
uthors and Contributors.=20
> There is currently one IPR disclosure.
> =20
> In addition, we are polling for knowledge of implementations of this draft=
, per the BESS policy in [2].  =20
> =20
> Thank you,
> Matthew & Stephane
> =20
> =20
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=

> =20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><p class=3D"MsoNormal" style=3D"-webkit-tex=
t-size-adjust: auto; margin-bottom: 0.0001pt;"><span lang=3D"EN-US" style=3D=
"font-size: 11pt; color: black;">Hi Chairs,</span></p><p class=3D"MsoNormal"=
 style=3D"-webkit-text-size-adjust: auto; margin-bottom: 0.0001pt;"><span la=
ng=3D"EN-US" style=3D"font-size: 11pt; color: black;"><br></span></p><p clas=
s=3D"MsoNormal" style=3D"-webkit-text-size-adjust: auto; margin-bottom: 0.00=
01pt;"><span lang=3D"EN-US" style=3D"font-size: 11pt; color: black;">I=E2=80=
=99m not aware of non-disclosed IPR.<o:p></o:p></span></p><p class=3D"MsoNor=
mal" style=3D"-webkit-text-size-adjust: auto; margin-bottom: 0.0001pt;"><spa=
n lang=3D"EN-US" style=3D"font-size: 11pt; color: black;"><br></span></p><p c=
lass=3D"MsoNormal" style=3D"-webkit-text-size-adjust: auto; margin-bottom: 0=
.0001pt;"><span lang=3D"EN-US" style=3D"font-size: 11pt; color: black;">As a=
 co-author and editor, I support&nbsp;</span><span lang=3D"EN-US" style=3D"c=
olor: black;">publishing this draft as a standards track RFC.</span></p><br>=
<div dir=3D"ltr">Gaurav</div><div dir=3D"ltr">LinkedIn</div><div dir=3D"ltr"=
><br></div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Nov 30, 2020, a=
t 9:15 AM, Bocci, Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt; wrote=
:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=
=BF

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii">=

<meta name=3D"Generator" content=3D"Microsoft Word 15 (filtered medium)">
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">This email starts a two-week working group last call for&nb=
sp;</span><span style=3D"color:black;mso-fareast-language:EN-GB">draft-ietf-=
bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">Please review the draft and send any comments to the BESS l=
ist. Also, please indicate if you support publishing the draft as a standard=
s track RFC.</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 20=
20.</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
">We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;th=
at applies to this Document, to ensure that&nbsp;IPR&nbsp;has been disclosed=
 in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
">If you are listed as an Author or a Contributor of this document please re=
spond to this email and indicate whether or not you are aware of any relevan=
t undisclosed&nbsp;IPR. The Document won't
 progress without answers from all the Authors and Contributors.&nbsp;<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;discl=
osure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">In addition, we are polling for knowledge o=
f implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareas=
t-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">Thank you,</span><span style=3D"color:blac=
k;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span style=3D=
"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps:=
 normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust=
: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converted=
-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-sr=
v6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services=
/</a><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span c=
lass=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive.i=
etf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D=
"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">htt=
ps://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
</div>


</div></blockquote></body></html>=

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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Thu, 3 Dec 2020 07:06:40 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Matthew/Stephane,

I support the publication of this draft as standards track RFC. As a co-aut=
hor, I am not aware of any IPR other than the one that has already been dis=
closed on the draft.

I would also like to report Cisco having implementations of this draft for =
L3VPN (IPv4/IPv6), Internet v4/v6 and EVPN services. Some of these implemen=
tations are already shipping and deployed in production networks.

Some of these implementation and deployment details have been captured in h=
ttps://datatracker.ietf.org/doc/draft-matsushima-spring-srv6-deployment-sta=
tus/

Thanks,
Ketan

From: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Sent: 30 November 2020 22:46
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Matthew/Stephane=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I support the publi=
cation of this draft as standards track RFC. As a co-author, I am not aware=
 of any IPR other than the one that has already been disclosed on the draft=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I would also like t=
o report Cisco having implementations of this draft for L3VPN (IPv4/IPv6), =
Internet v4/v6 and EVPN services. Some of these implementations are already=
 shipping and deployed in production
 networks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Some of these imple=
mentation and deployment details have been captured in
<a href=3D"https://datatracker.ietf.org/doc/draft-matsushima-spring-srv6-de=
ployment-status/">
https://datatracker.ietf.org/doc/draft-matsushima-spring-srv6-deployment-st=
atus/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Ketan<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:EN-IN"> Bocci, Matthew (Nokia - GB) &lt;=
matthew.bocci@nokia.com&gt;
<br>
<b>Sent:</b> 30 November 2020 22:46<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servi=
ces/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"E=
N-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 3 Dec 2020 09:17:05 +0100
Message-ID: <CAOj+MMFnrRzGfnwDsaUq0AxN+mCuXFYEG6QbBg9F3XH+-gM4sA@mail.gmail.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
Cc: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Content-Type: multipart/alternative; boundary="000000000000b7574705b58afc1c"
Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/w6t9HHNjmmBMOgumYL5K5ilzzzM>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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--000000000000b7574705b58afc1c
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Hi Matthew & Stephane,



I support the publication of this draft as standards track RFC.


As a co-author, I am not aware of any undisclosed IPR(s).


Thank you,

Robert



On Mon, Nov 30, 2020 at 6:15 PM Bocci, Matthew (Nokia - GB) <
matthew.bocci@nokia.com> wrote:

> This email starts a two-week working group last call for draft-ietf-bess-srv6-services-05
> [1]
>
>
>
> Please review the draft and send any comments to the BESS list. Also,
> please indicate if you support publishing the draft as a standards track
> RFC.
>
>
>
> This poll runs until Monday 14th December 2020.
>
>
>
> We are also polling for knowledge of any undisclosed IPR that applies to
> this Document, to ensure that IPR has been disclosed in compliance with
> IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
>
>
> If you are listed as an Author or a Contributor of this document please
> respond to this email and indicate whether or not you are aware of any
> relevant undisclosed IPR. The Document won't progress without answers from
> all the Authors and Contributors.
>
> There is currently one IPR disclosure.
>
>
>
> In addition, we are polling for knowledge of implementations of this
> draft, per the BESS policy in [2].
>
>
>
> Thank you,
>
> Matthew & Stephane
>
>
>
>
>
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
>
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw
>
>
>

--000000000000b7574705b58afc1c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><p class=3D"MsoNormal"><span style=3D"font-size:11pt">Hi M=
atthew &amp; Stephane,<u></u><u></u></span></p><p class=3D"MsoNormal"><span=
 style=3D"font-size:11pt"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"font-size:11pt">I support the publication of this draft=
 as standards track RFC.=C2=A0</span></p><p class=3D"MsoNormal"><span style=
=3D"font-size:11pt"><br></span></p><p class=3D"MsoNormal"><span style=3D"fo=
nt-size:11pt">As a co-author, I am not aware of any undisclosed IPR(s).=C2=
=A0</span></p><p class=3D"MsoNormal"><span style=3D"font-size:11pt"><br></s=
pan></p><p class=3D"MsoNormal"><span style=3D"font-size:11pt">Thank you,</s=
pan></p><p class=3D"MsoNormal"><span style=3D"font-size:11pt">Robert</span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size:11pt"><br></span></p></=
div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On=
 Mon, Nov 30, 2020 at 6:15 PM Bocci, Matthew (Nokia - GB) &lt;<a href=3D"ma=
ilto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt; wrote:<br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-GB" style=3D"overflow-wrap: break-word;">
<div class=3D"gmail-m_-69922792612712114WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">This emai=
l starts a two-week working group last call for=C2=A0</span><span style=3D"=
color:black">draft-ietf-bess-srv6-services-05 [1]<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">Please re=
view the draft and send any comments to the BESS list. Also, please indicat=
e if you support publishing the draft as a standards track RFC.</span><span=
 style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">This=C2=
=A0poll=C2=A0runs until Monday 14th=C2=A0December 2020.</span><span style=
=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">We are also=C2=A0polling=
 for knowledge of any undisclosed=C2=A0IPR=C2=A0that applies to this Docume=
nt, to ensure that=C2=A0IPR=C2=A0has been disclosed in compliance with IETF=
=C2=A0IPR=C2=A0rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><u></u>=C2=A0<u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:black">If you are listed as an =
Author or a Contributor of this document please respond to this email and i=
ndicate whether or not you are aware of any relevant undisclosed=C2=A0IPR. =
The Document won&#39;t
 progress without answers from all the Authors and Contributors.=C2=A0<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">There is currently one=C2=A0IPR=C2=A0disclosure.<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">In addition, we are polling for knowledge of implementations</span><s=
pan lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11pt;color:black">of this dr=
aft, per the BESS policy in [2]. =C2=A0=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><u></u>=C2=A0<u></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">Thank you,</span><span style=3D"color:black"><u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">Matthew &amp; Stephane</span><span style=3D"color:black"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps:normal;text-align:start;w=
ord-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"gmail-m_-69922=
792612712114apple-converted-space">=C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-ietf-bess-srv6-services/" target=3D"_blank">https://datatra=
cker.ietf.org/doc/draft-ietf-bess-srv6-services/</a><u></u><u></u></span></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"gmail-m_-69922792612712114apple-converted-space">=C2=A0</span><a h=
ref=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqD=
pw" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56S=
EdkjqDpw" target=3D"_blank">https://mailarchive.ietf.org/arch/msg/bess/cG3X=
1tTqb_vPC4rg56SEdkjqDpw</a></span><span style=3D"color:black"><u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
</div>

</blockquote></div>

--000000000000b7574705b58afc1c--


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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/hvnzGTcvjJlZR9R-Bu4XmgNgC2M>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Haibo,

This clarification was explicitly added based on feedback that the authors =
received.

This document does not change the definition of the Label Field of RFC4364 =
and so it has always been 20 bits. There has been this text about 24-bit in=
 other parts of the draft since RFC7432 allows that.

If you see the previous versions of this document, the encoding of the labe=
l was also previously clarified with a reference to RFC8277.

Regarding the BOS bit, the clarification is provided by RFC8277. Previously=
, this was under-specified by RFC3107. There are implementations around tha=
t do not check/examine the BOS field and assume a single label. You can see=
 some of this history captured in RFC8277.

Thanks,
Ketan

From: Wanghaibo (Rainsword) <rainsword.wang@huawei.com>
Sent: 03 December 2020 09:13
To: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>; draft-ietf-bess-=
srv6-services@ietf.org; bess@ietf.org
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05


Dear authors and all,



 I find the following changes in the new version, which may cause incompati=
ble changes in the implemented version.
[cid:image001.png@01D6C980.4EF05B20]


The label field described in RFC4364:

4.3.4. How VPN-IPv4 NLRI Is Carried in BGP

   The labeled VPN-IPv4 NLRI itself is encoded as specified in

   [MPLS-BGP<https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP>], where the =
prefix consists of an 8-byte RD followed by an

   IPv4 prefix.


 RFC 3107 describe the label field:

3. Carrying Label Mapping Information

      b) Label:



         The Label field carries one or more labels (that corresponds to

         the stack of labels [MPLS-ENCAPS<https://tools.ietf.org/html/rfc31=
07#ref-MPLS-ENCAPS>]).  Each label is encoded as 3

         octets, where the high-order 20 bits contain the label value,

         and the low order bit contains "Bottom of Stack" (as defined in

         [MPLS-ENCAPS<https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS>]=
).


According to the definition, the label field in RFC 4364 should be 3 bytes,=
  but only 20 bits are used as the label value. So we may also use the enti=
re 3 octets.

On the other hand,  if only 20 bits are used, do we need to add the BoS fla=
g to the part when do the transposition?



Best Regards,

Haibo

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-bess-srv6-serv=
ices@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Haibo,<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">This clarification =
was explicitly added based on feedback that the authors received.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">This document does =
not change the definition of the Label Field of RFC4364 and so it has alway=
s been 20 bits. There has been this text about 24-bit in other parts of the=
 draft since RFC7432 allows that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">If you see the prev=
ious versions of this document, the encoding of the label was also previous=
ly clarified with a reference to RFC8277.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Regarding the BOS b=
it, the clarification is provided by RFC8277. Previously, this was under-sp=
ecified by RFC3107. There are implementations around that do not check/exam=
ine the BOS field and assume a single
 label. You can see some of this history captured in RFC8277.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Ketan<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:EN-IN"> Wanghaibo (Rainsword) &lt;rainsw=
ord.wang@huawei.com&gt;
<br>
<b>Sent:</b> 03 December 2020 09:13<br>
<b>To:</b> Bocci, Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;; dra=
ft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-f=
areast-language:ZH-CN">Dear authors and all,<o:p></o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span=
></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN"> I find the following c=
hanges in the new version, which may cause incompatible changes in the impl=
emented version.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-f=
areast-language:ZH-CN"><img width=3D"1316" height=3D"73" style=3D"width:13.=
7083in;height:.7583in" id=3D"_x56fe__x7247__x0020_1" src=3D"cid:image001.pn=
g@01D6C980.4EF05B20"></span><span lang=3D"EN-US" style=3D"font-size:10.5pt;=
color:#1F497D;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">The label field describ=
ed in RFC4364:</span><span lang=3D"EN-US" style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif;mso-fareast-language:ZH-CN"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">4.3.4. How VP=
N-IPv4 NLRI Is Carried in BGP<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-=
CN">&nbsp;&nbsp; The labeled VPN-IPv4 NLRI itself is encoded as specified i=
n<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-=
CN">&nbsp;&nbsp; [<a href=3D"https://tools.ietf.org/html/rfc4364#ref-MPLS-B=
GP" title=3D"&quot;Carrying Label Information in BGP-4&quot;"><span style=
=3D"color:windowtext">MPLS-BGP</span></a>], where the prefix consists of an=
 8-byte RD followed by an<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-=
CN">&nbsp;&nbsp; IPv4 prefix.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;RFC 3107 describe=
 the label field:<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">3. Carrying L=
abel Mapping Information<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) Label:<o:p></o:p></span=
></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The Labe=
l field carries one or more labels (that corresponds to<o:p></o:p></span></=
pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the stac=
k of labels [<a href=3D"https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS=
" title=3D"&quot;MPLS Label Stack Encoding&quot;">MPLS-ENCAPS</a>]).&nbsp; =
<b>Each label is encoded as 3<o:p></o:p></b></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><b><span lang=
=3D"EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fa=
reast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; octe=
ts,</span></b><span lang=3D"EN-US" style=3D"font-family:&quot;var\(--a\)&qu=
ot;;color:#404040;mso-fareast-language:ZH-CN"> where the high-order 20 bits=
 contain the label value,<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and the =
low order bit contains &quot;Bottom of Stack&quot; (as defined in<o:p></o:p=
></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<a href=
=3D"https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPL=
S Label Stack Encoding&quot;">MPLS-ENCAPS</a>]).<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">According to the defini=
tion, the label field in RFC 4364 should be 3 bytes, &nbsp;but only 20 bits=
 are used as the label value. So we may also use the entire 3 octets. <o:p>=
</o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">On the other hand, &nbs=
p;if only 20 bits are used, do we need to add the BoS flag to the part when=
 do the transposition?<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529;mso-fareast-language:ZH-CN">Best Regards,<o:p></o:p><=
/span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529;mso-fareast-language:ZH-CN">Haibo<o:p></o:p></span></=
pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
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From: "Clarence Filsfils (cfilsfil)" <cfilsfil@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Thu, 3 Dec 2020 09:20:44 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Support publication. I am not aware of any undisclosed IPR as co-author.

Cheers,
Clarence


From: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Sent: Monday, November 30, 2020 18:16
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal">Support publication. I am not aware of any undisclos=
ed IPR as co-author.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Cheers,<o:p></o:p></p>
<p class=3D"MsoNormal">Clarence<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt">From:</span></b>=
<span style=3D"font-size:11.0pt"> Bocci, Matthew (Nokia - GB) &lt;matthew.b=
occi@nokia.com&gt;
<br>
<b>Sent:</b> Monday, November 30, 2020 18:16<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This email starts a two-week working group last call for&nbsp;</span><sp=
an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">draft-ie=
tf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">Please review the draft and send any comments to the BESS list. Also, pl=
ease indicate if you support publishing the draft as a standards track RFC.=
</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.</span><sp=
an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">In addition, we are polling for knowledge of implementa=
tions</span>
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">of =
this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" style=3D"color:bl=
ack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Matthew &amp; Stephane</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">[1]<span class=3D"apple-converted-space">&nbsp;=
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/"=
>https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/</a></span>=
</span><span class=3D"apple-converted-space"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">[2]<span class=3D"apple-=
converted-space">&nbsp;</span><a href=3D"https://mailarchive.ietf.org/arch/=
msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://ma=
ilarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://maila=
rchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span l=
ang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</div>
</body>
</html>

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From: Huzhibo <huzhibo@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Hi Matthew, Stephane and WG,

I support publishing this draft as a standards track RFC.
I know that there are many deployment cases that have already been captured=
 in the document: https://tools.ietf.org/id/draft-tian-spring-srv6-deployme=
nt-consideration-03.txt

Regards,
--Zhibo
From: Bocci, Matthew (Nokia - GB) [mailto:matthew.bocci@nokia.com]
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Hi Matthew, Stephane and WG,<br>
<br>
I support publishing this draft as a standards track RFC.<br>
I know that there are many deployment cases that have already been captured=
 in the document:
<a href=3D"https://tools.ietf.org/id/draft-tian-spring-srv6-deployment-cons=
ideration-03.txt">
<span style=3D"color:black;text-decoration:none">https://tools.ietf.org/id/=
draft-tian-spring-srv6-deployment-consideration-03.txt</span></a><br>
<br>
Regards,<br>
--Zhibo<o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> Bocci, Matthew (Nokia - GB) [mai=
lto:matthew.bocci@nokia.com]
<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servi=
ces/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"E=
N-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

--_000_5779df41eefc452287b6beeaa642975chuaweicom_--


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From: "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>
To: "Ketan Talaulikar (ketant)" <ketant@cisco.com>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Hi Ketan,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; Thanks for your reply.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">RFC 8277 =
has clearly described that the label field is only 20 bits.
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">At the be=
ginning, we consider it to use the 20-bits to do the transposition. But in =
some interconnection tests, some vendors
 are use the 24-bits to do the transposition.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:5.5pt"><span lang=3D"EN-US" sty=
le=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">So I=A1=
=AFm worried about that the change may cause incompatible interop.
</span><span lang=3D"EN-IN" style=3D"font-size:11.0pt;color:#1F497D;mso-far=
east-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Regards</span><span style=3D"font-size=
:11.0pt;font-family:=CB=CE=CC=E5;color:#1F497D;mso-fareast-language:ZH-CN">=
=A3=AC</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:#1F497D;m=
so-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Haibo<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> Ketan Talaulikar (ketant) [mailt=
o:ketant@cisco.com]
<br>
<b>Sent:</b> Thursday, December 3, 2020 5:01 PM<br>
<b>To:</b> Wanghaibo (Rainsword) &lt;rainsword.wang@huawei.com&gt;; Bocci, =
Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;; draft-ietf-bess-srv6-=
services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">Hi H=
aibo,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">This=
 clarification was explicitly added based on feedback that the authors rece=
ived.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">This=
 document does not change the definition of the Label Field of RFC4364 and =
so it has always been 20 bits. There has been this text about 24-bit in oth=
er parts of the draft since RFC7432 allows
 that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">If y=
ou see the previous versions of this document, the encoding of the label wa=
s also previously clarified with a reference to RFC8277.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">Rega=
rding the BOS bit, the clarification is provided by RFC8277. Previously, th=
is was under-specified by RFC3107. There are implementations around that do=
 not check/examine the BOS field and assume
 a single label. You can see some of this history captured in RFC8277.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">Than=
ks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt">Keta=
n<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:EN-IN"> Wanghaibo (Rainsword) &lt;<a hre=
f=3D"mailto:rainsword.wang@huawei.com">rainsword.wang@huawei.com</a>&gt;
<br>
<b>Sent:</b> 03 December 2020 09:13<br>
<b>To:</b> Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@=
nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-IN"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">=
Dear authors and all,<o:p></o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif"> I find the following changes in the new versi=
on, which may cause incompatible changes in the implemented version.<o:p></=
o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-f=
areast-language:ZH-CN"><img border=3D"0" width=3D"1316" height=3D"73" id=3D=
"=CD=BC=C6=AC_x0020_1" src=3D"cid:image001.png@01D6C99E.5738BC00"><span sty=
le=3D"color:#1F497D"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">The label field described in RFC4364:</span><s=
pan lang=3D"EN-US" style=3D"font-family:&quot;Calibri&quot;,sans-serif"><o:=
p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">4.3.4. How VP=
N-IPv4 NLRI Is Carried in BGP<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">&nbsp;&nbsp; The la=
beled VPN-IPv4 NLRI itself is encoded as specified in<o:p></o:p></span></pr=
e>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">&nbsp;&nbsp; [<a hr=
ef=3D"https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP" title=3D"&quot;Carr=
ying Label Information in BGP-4&quot;"><span style=3D"color:windowtext">MPL=
S-BGP</span></a>], where the prefix consists of an 8-byte RD followed by an=
<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif">&nbsp;&nbsp; IPv4 p=
refix.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">&nbsp;RFC 3107 describe the label field:<o:p><=
/o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">3. Carrying L=
abel Mapping Information<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp; b) Label:<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040"><o:p>=
&nbsp;</o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The Label field carries one or =
more labels (that corresponds to<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the stack of labels [<a href=3D=
"https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS L=
abel Stack Encoding&quot;">MPLS-ENCAPS</a>]).&nbsp; <b>Each label is encode=
d as 3<o:p></o:p></b></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><b><span lang=
=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; octets,</span></b><span lan=
g=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">=
 where the high-order 20 bits contain the label value,<o:p></o:p></span></p=
re>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and the low order bit contains =
&quot;Bottom of Stack&quot; (as defined in<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;color:#404040">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<a href=3D"https://tools.ietf.=
org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS Label Stack Encoding&=
quot;">MPLS-ENCAPS</a>]).<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">According to the definition, the label field i=
n RFC 4364 should be 3 bytes, &nbsp;but only 20 bits are used as the label =
value. So we may also use the entire 3 octets. <o:p></o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var(--a)&quot;,serif">On the other hand, &nbsp;if only 20 bits are u=
sed, do we need to add the BoS flag to the part when do the transposition?<=
o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529">Best Regards,<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529">Haibo<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Thu, 3 Dec 2020 10:25:00 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/72R92PZYUTMew2GtGGB8flSV6qE>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Haibo,

This is not a change but a clarification to avoid exactly those kind of iss=
ues.

Thanks,
Ketan

From: Wanghaibo (Rainsword) <rainsword.wang@huawei.com>
Sent: 03 December 2020 15:39
To: Ketan Talaulikar (ketant) <ketant@cisco.com>; Bocci, Matthew (Nokia - G=
B) <matthew.bocci@nokia.com>; draft-ietf-bess-srv6-services@ietf.org; bess@=
ietf.org
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05

Hi Ketan,

         Thanks for your reply.

RFC 8277 has clearly described that the label field is only 20 bits.

At the beginning, we consider it to use the 20-bits to do the transposition=
. But in some interconnection tests, some vendors are use the 24-bits to do=
 the transposition.

So I=1B$B!G=1B(Bm worried about that the change may cause incompatible inte=
rop.

Regards=1B$B!$=1B(B
Haibo

From: Ketan Talaulikar (ketant) [mailto:ketant@cisco.com]
Sent: Thursday, December 3, 2020 5:01 PM
To: Wanghaibo (Rainsword) <rainsword.wang@huawei.com<mailto:rainsword.wang@=
huawei.com>>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com<mailto:m=
atthew.bocci@nokia.com>>; draft-ietf-bess-srv6-services@ietf.org<mailto:dra=
ft-ietf-bess-srv6-services@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05

Hi Haibo,

This clarification was explicitly added based on feedback that the authors =
received.

This document does not change the definition of the Label Field of RFC4364 =
and so it has always been 20 bits. There has been this text about 24-bit in=
 other parts of the draft since RFC7432 allows that.

If you see the previous versions of this document, the encoding of the labe=
l was also previously clarified with a reference to RFC8277.

Regarding the BOS bit, the clarification is provided by RFC8277. Previously=
, this was under-specified by RFC3107. There are implementations around tha=
t do not check/examine the BOS field and assume a single label. You can see=
 some of this history captured in RFC8277.

Thanks,
Ketan

From: Wanghaibo (Rainsword) <rainsword.wang@huawei.com<mailto:rainsword.wan=
g@huawei.com>>
Sent: 03 December 2020 09:13
To: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com<mailto:matthew.boc=
ci@nokia.com>>; draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-be=
ss-srv6-services@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05


Dear authors and all,



 I find the following changes in the new version, which may cause incompati=
ble changes in the implemented version.
[cid:image001.png@01D6C98C.A575E620]


The label field described in RFC4364:

4.3.4. How VPN-IPv4 NLRI Is Carried in BGP

   The labeled VPN-IPv4 NLRI itself is encoded as specified in

   [MPLS-BGP<https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP>], where the =
prefix consists of an 8-byte RD followed by an

   IPv4 prefix.


 RFC 3107 describe the label field:

3. Carrying Label Mapping Information

      b) Label:



         The Label field carries one or more labels (that corresponds to

         the stack of labels [MPLS-ENCAPS<https://tools.ietf.org/html/rfc31=
07#ref-MPLS-ENCAPS>]).  Each label is encoded as 3

         octets, where the high-order 20 bits contain the label value,

         and the low order bit contains "Bottom of Stack" (as defined in

         [MPLS-ENCAPS<https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS>]=
).


According to the definition, the label field in RFC 4364 should be 3 bytes,=
  but only 20 bits are used as the label value. So we may also use the enti=
re 3 octets.

On the other hand,  if only 20 bits are used, do we need to add the BoS fla=
g to the part when do the transposition?



Best Regards,

Haibo

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-bess-srv6-serv=
ices@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Haibo,<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">This is not a chang=
e but a clarification to avoid exactly those kind of issues.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Ketan<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> Wanghaibo (Rainsword) &lt;rainsw=
ord.wang@huawei.com&gt;
<br>
<b>Sent:</b> 03 December 2020 15:39<br>
<b>To:</b> Ketan Talaulikar (ketant) &lt;ketant@cisco.com&gt;; Bocci, Matth=
ew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;; draft-ietf-bess-srv6-servi=
ces@ietf.org; bess@ietf.org<br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Hi Ketan,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; Thanks for your reply.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">RFC 8277 =
has clearly described that the label field is only 20 bits.
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">At the be=
ginning, we consider it to use the 20-bits to do the transposition. But in =
some interconnection tests, some vendors
 are use the 24-bits to do the transposition.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:5.5pt"><span lang=3D"EN-US" sty=
le=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:16.5pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">So I=1B$B=
!G=1B(Bm worried about that the change may cause incompatible interop.
</span><span style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:Z=
H-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Regards</span><span lang=3D"ZH-CN" sty=
le=3D"font-size:11.0pt;font-family:SimSun;color:#1F497D;mso-fareast-languag=
e:ZH-CN">=1B$B!$=1B(B</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;=
color:#1F497D;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Haibo<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> Ketan Talaulikar (ketant) [<a hr=
ef=3D"mailto:ketant@cisco.com">mailto:ketant@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, December 3, 2020 5:01 PM<br>
<b>To:</b> Wanghaibo (Rainsword) &lt;<a href=3D"mailto:rainsword.wang@huawe=
i.com">rainsword.wang@huawei.com</a>&gt;; Bocci, Matthew (Nokia - GB) &lt;<=
a href=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Haibo,<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">This clarification =
was explicitly added based on feedback that the authors received.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">This document does =
not change the definition of the Label Field of RFC4364 and so it has alway=
s been 20 bits. There has been this text about 24-bit in other parts of the=
 draft since RFC7432 allows that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">If you see the prev=
ious versions of this document, the encoding of the label was also previous=
ly clarified with a reference to RFC8277.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Regarding the BOS b=
it, the clarification is provided by RFC8277. Previously, this was under-sp=
ecified by RFC3107. There are implementations around that do not check/exam=
ine the BOS field and assume a single
 label. You can see some of this history captured in RFC8277.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Ketan<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:EN-IN"> Wanghaibo (Rainsword) &lt;<a hre=
f=3D"mailto:rainsword.wang@huawei.com">rainsword.wang@huawei.com</a>&gt;
<br>
<b>Sent:</b> 03 December 2020 09:13<br>
<b>To:</b> Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@=
nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-f=
areast-language:ZH-CN">Dear authors and all,<o:p></o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span=
></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN"> I find the following c=
hanges in the new version, which may cause incompatible changes in the impl=
emented version.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-f=
areast-language:ZH-CN"><img border=3D"0" width=3D"1316" height=3D"73" style=
=3D"width:13.7083in;height:.7583in" id=3D"_x56fe_=1B$BJR=1B(B_x0020_1" src=
=3D"cid:image001.png@01D6C98C.A575E620"></span><span lang=3D"EN-US" style=
=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">The label field describ=
ed in RFC4364:</span><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-=
CN"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">4.3.4. How VP=
N-IPv4 NLRI Is Carried in BGP<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-=
CN">&nbsp;&nbsp; The labeled VPN-IPv4 NLRI itself is encoded as specified i=
n<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-=
CN">&nbsp;&nbsp; [<a href=3D"https://tools.ietf.org/html/rfc4364#ref-MPLS-B=
GP" title=3D"&quot;Carrying Label Information in BGP-4&quot;"><span style=
=3D"color:windowtext">MPLS-BGP</span></a>], where the prefix consists of an=
 8-byte RD followed by an<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-=
CN">&nbsp;&nbsp; IPv4 prefix.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;RFC 3107 describe=
 the label field:<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;mso-para-margin-left:3.0=
gd"><span lang=3D"EN-US" style=3D"mso-fareast-language:ZH-CN">3. Carrying L=
abel Mapping Information<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) Label:<o:p></o:p></span=
></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The Labe=
l field carries one or more labels (that corresponds to<o:p></o:p></span></=
pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the stac=
k of labels [<a href=3D"https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS=
" title=3D"&quot;MPLS Label Stack Encoding&quot;">MPLS-ENCAPS</a>]).&nbsp; =
<b>Each label is encoded as 3<o:p></o:p></b></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><b><span lang=
=3D"EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fa=
reast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; octe=
ts,</span></b><span lang=3D"EN-US" style=3D"font-family:&quot;var\(--a\)&qu=
ot;;color:#404040;mso-fareast-language:ZH-CN"> where the high-order 20 bits=
 contain the label value,<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and the =
low order bit contains &quot;Bottom of Stack&quot; (as defined in<o:p></o:p=
></span></pre>
<pre style=3D"margin-left:36.0pt;mso-para-margin-left:3.0gd"><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<a href=
=3D"https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPL=
S Label Stack Encoding&quot;">MPLS-ENCAPS</a>]).<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">According to the defini=
tion, the label field in RFC 4364 should be 3 bytes, &nbsp;but only 20 bits=
 are used as the label value. So we may also use the entire 3 octets. <o:p>=
</o:p></span></pre>
<pre style=3D"text-indent:18.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">On the other hand, &nbs=
p;if only 20 bits are used, do we need to add the BoS flag to the part when=
 do the transposition?<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:Z=
H-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529;mso-fareast-language:ZH-CN">Best Regards,<o:p></o:p><=
/span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-family:C=
onsolas;color:#212529;mso-fareast-language:ZH-CN">Haibo<o:p></o:p></span></=
pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "Ketan Talaulikar (ketant)" <ketant@cisco.com>, "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Thu, 3 Dec 2020 13:50:02 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/oJUpA9Qi8G0l84pZYqjJIY78Kj0>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Haibo,

I agree with Ketan=1B$B!D=1B(B furthermore, the spec clearly defines the st=
ructure sub-sub-TLV, where the transposition length and offset are needed; =
it also defines how to place those bits into the label field of the NLRI, i=
rrespective of the transposition length being 24 or 20 or anything differen=
t.

Out of interest, how can that lead to interop issues? Can you please elabor=
ate?

Thank you.
Jorge

From: Ketan Talaulikar (ketant) <ketant@cisco.com>
Date: Thursday, December 3, 2020 at 11:25 AM
To: Wanghaibo (Rainsword) <rainsword.wang@huawei.com>, Bocci, Matthew (Noki=
a - GB) <matthew.bocci@nokia.com>, draft-ietf-bess-srv6-services@ietf.org <=
draft-ietf-bess-srv6-services@ietf.org>, bess@ietf.org <bess@ietf.org>
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05
Hi Haibo,

This is not a change but a clarification to avoid exactly those kind of iss=
ues.

Thanks,
Ketan

From: Wanghaibo (Rainsword) <rainsword.wang@huawei.com>
Sent: 03 December 2020 15:39
To: Ketan Talaulikar (ketant) <ketant@cisco.com>; Bocci, Matthew (Nokia - G=
B) <matthew.bocci@nokia.com>; draft-ietf-bess-srv6-services@ietf.org; bess@=
ietf.org
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05

Hi Ketan,

         Thanks for your reply.

RFC 8277 has clearly described that the label field is only 20 bits.

At the beginning, we consider it to use the 20-bits to do the transposition=
. But in some interconnection tests, some vendors are use the 24-bits to do=
 the transposition.

So I=1B$B!G=1B(Bm worried about that the change may cause incompatible inte=
rop.

Regards=1B$B!$=1B(B
Haibo

From: Ketan Talaulikar (ketant) [mailto:ketant@cisco.com]
Sent: Thursday, December 3, 2020 5:01 PM
To: Wanghaibo (Rainsword) <rainsword.wang@huawei.com<mailto:rainsword.wang@=
huawei.com>>; Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com<mailto:m=
atthew.bocci@nokia.com>>; draft-ietf-bess-srv6-services@ietf.org<mailto:dra=
ft-ietf-bess-srv6-services@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05

Hi Haibo,

This clarification was explicitly added based on feedback that the authors =
received.

This document does not change the definition of the Label Field of RFC4364 =
and so it has always been 20 bits. There has been this text about 24-bit in=
 other parts of the draft since RFC7432 allows that.

If you see the previous versions of this document, the encoding of the labe=
l was also previously clarified with a reference to RFC8277.

Regarding the BOS bit, the clarification is provided by RFC8277. Previously=
, this was under-specified by RFC3107. There are implementations around tha=
t do not check/examine the BOS field and assume a single label. You can see=
 some of this history captured in RFC8277.

Thanks,
Ketan

From: Wanghaibo (Rainsword) <rainsword.wang@huawei.com<mailto:rainsword.wan=
g@huawei.com>>
Sent: 03 December 2020 09:13
To: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com<mailto:matthew.boc=
ci@nokia.com>>; draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-be=
ss-srv6-services@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: RE: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05


Dear authors and all,



 I find the following changes in the new version, which may cause incompati=
ble changes in the implemented version.
[cid:image001.png@01D6C983.919D1D20]


The label field described in RFC4364:

4.3.4. How VPN-IPv4 NLRI Is Carried in BGP

   The labeled VPN-IPv4 NLRI itself is encoded as specified in

   [MPLS-BGP<https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP>], where the =
prefix consists of an 8-byte RD followed by an

   IPv4 prefix.


 RFC 3107 describe the label field:

3. Carrying Label Mapping Information

      b) Label:



         The Label field carries one or more labels (that corresponds to

         the stack of labels [MPLS-ENCAPS<https://tools.ietf.org/html/rfc31=
07#ref-MPLS-ENCAPS>]).  Each label is encoded as 3

         octets, where the high-order 20 bits contain the label value,

         and the low order bit contains "Bottom of Stack" (as defined in

         [MPLS-ENCAPS<https://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS>]=
).


According to the definition, the label field in RFC 4364 should be 3 bytes,=
  but only 20 bits are used as the label value. So we may also use the enti=
re 3 octets.

On the other hand,  if only 20 bits are used, do we need to add the BoS fla=
g to the part when do the transposition?



Best Regards,

Haibo

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-bess-srv6-serv=
ices@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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</head>
<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"purple" style=3D"word-wrap:b=
reak-word">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Hi Haibo,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">I agree with Ketan=1B$B!D=1B(B furthermore, the spec clearly defines the =
structure sub-sub-TLV, where the transposition length and offset are needed=
; it also defines how to place those bits into
 the label field of the NLRI, irrespective of the transposition length bein=
g 24 or 20 or anything different.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Out of interest, how can that lead to interop issues? Can you please elab=
orate?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"color:black">From: </span></b><span style=3D"color:black"=
>Ketan Talaulikar (ketant) &lt;ketant@cisco.com&gt;<br>
<b>Date: </b>Thursday, December 3, 2020 at 11:25 AM<br>
<b>To: </b>Wanghaibo (Rainsword) &lt;rainsword.wang@huawei.com&gt;, Bocci, =
Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;, draft-ietf-bess-srv6-=
services@ietf.org &lt;draft-ietf-bess-srv6-services@ietf.org&gt;, bess@ietf=
.org &lt;bess@ietf.org&gt;<br>
<b>Subject: </b>RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Hi Haibo,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">This is not a change but a clarification to avoid exactly those k=
ind of issues.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Thanks,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Ketan</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font-=
size:11.0pt;mso-fareast-language:ZH-CN">From:</span></b><span style=3D"font=
-size:11.0pt;mso-fareast-language:ZH-CN"> Wanghaibo (Rainsword) &lt;rainswo=
rd.wang@huawei.com&gt;
<br>
<b>Sent:</b> 03 December 2020 15:39<br>
<b>To:</b> Ketan Talaulikar (ketant) &lt;ketant@cisco.com&gt;; Bocci, Matth=
ew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;; draft-ietf-bess-srv6-servi=
ces@ietf.org; bess@ietf.org<br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">Hi Ketan,</span><o:p></o=
:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; Thanks for your reply.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">RFC 8=
277 has clearly described that the label field is only 20 bits.
</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp=
;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">At th=
e beginning, we consider it to use the 20-bits to do the transposition. But=
 in some interconnection tests, some vendors
 are use the 24-bits to do the transposition.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:5.5pt"><span=
 style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;=
</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">So I=
=1B$B!G=1B(Bm worried about that the change may cause incompatible interop.
</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">Regards</span><span lang=
=3D"ZH-CN" style=3D"font-size:11.0pt;font-family:SimSun;color:#1F497D;mso-f=
areast-language:ZH-CN">=1B$B!$=1B(B</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">Haibo</span><o:p></o:p><=
/p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font-=
size:11.0pt;mso-fareast-language:ZH-CN">From:</span></b><span style=3D"font=
-size:11.0pt;mso-fareast-language:ZH-CN"> Ketan Talaulikar (ketant) [<a hre=
f=3D"mailto:ketant@cisco.com">mailto:ketant@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, December 3, 2020 5:01 PM<br>
<b>To:</b> Wanghaibo (Rainsword) &lt;<a href=3D"mailto:rainsword.wang@huawe=
i.com">rainsword.wang@huawei.com</a>&gt;; Bocci, Matthew (Nokia - GB) &lt;<=
a href=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Hi Haibo,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">This clarification was explicitly added based on feedback that th=
e authors received.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">This document does not change the definition of the Label Field o=
f RFC4364 and so it has always been 20 bits. There has been this text about=
 24-bit in other parts of the draft since
 RFC7432 allows that.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">If you see the previous versions of this document, the encoding o=
f the label was also previously clarified with a reference to RFC8277.</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Regarding the BOS bit, the clarification is provided by RFC8277. =
Previously, this was under-specified by RFC3107. There are implementations =
around that do not check/examine the BOS
 field and assume a single label. You can see some of this history captured=
 in RFC8277.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Thanks,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">Ketan</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt">&nbsp;</span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font-=
size:11.0pt;mso-fareast-language:EN-IN">From:</span></b><span style=3D"font=
-size:11.0pt;mso-fareast-language:EN-IN"> Wanghaibo (Rainsword) &lt;<a href=
=3D"mailto:rainsword.wang@huawei.com">rainsword.wang@huawei.com</a>&gt;
<br>
<b>Sent:</b> 03 December 2020 09:13<br>
<b>To:</b> Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@=
nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<pre style=3D"margin-left:36.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;mso-fareast-language:ZH-CN">Dear authors and all,</span><o:p></o:p=
></pre>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span style=3D"font-fa=
mily:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;</span><o:p><=
/o:p></pre>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span style=3D"font-fa=
mily:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN"> I find the followi=
ng changes in the new version, which may cause incompatible changes in the =
implemented version.</span><o:p></o:p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;mso-fareast-language:ZH-CN"><img border=3D"0" width=3D"1316" heigh=
t=3D"73" style=3D"width:13.7083in;height:.7604in" id=3D"&#22270;=1B$BJR=1B(=
B_x0020_1" src=3D"cid:image001.png@01D6C983.919D1D20"></span><o:p></o:p></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span style=3D"font-fa=
mily:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">The label field des=
cribed in RFC4364:</span><o:p></o:p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">4.3.4. How VPN-IPv4 NLRI Is Carried in BGP</span><o:p><=
/o:p></p>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;mso-fareast-language:ZH-CN">&nbsp;&nbsp; The labeled VPN-IPv4 NLRI=
 itself is encoded as specified in</span><o:p></o:p></pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;mso-fareast-language:ZH-CN">&nbsp;&nbsp; [<a href=3D"https://tools=
.ietf.org/html/rfc4364#ref-MPLS-BGP" title=3D"&quot;Carrying Label Informat=
ion in BGP-4&quot;"><span style=3D"color:windowtext">MPLS-BGP</span></a>], =
where the prefix consists of an 8-byte RD followed by an</span><o:p></o:p><=
/pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;mso-fareast-language:ZH-CN">&nbsp;&nbsp; IPv4 prefix.</span><o:p><=
/o:p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><o:p></o:p></p>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span style=3D"font-fa=
mily:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;RFC 3107 desc=
ribe the label field:</span><o:p></o:p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">3. Carrying Label Mapping Information</span><o:p></o:p>=
</p>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp; b) Label:</span><o:p></o:p></pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; The Label field carries one or more labels (that c=
orresponds to</span><o:p></o:p></pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; the stack of labels [<a href=3D"https://tools.ietf=
.org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS Label Stack Encoding=
&quot;">MPLS-ENCAPS</a>]).&nbsp; <b>Each label is encoded as 3</b></span><o=
:p></o:p></pre>
<pre style=3D"margin-left:72.0pt"><b><span style=3D"font-family:&quot;var\(=
--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp; octets,</span></b><span style=3D"font-family:&q=
uot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN"> where the h=
igh-order 20 bits contain the label value,</span><o:p></o:p></pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; and the low order bit contains &quot;Bottom of Sta=
ck&quot; (as defined in</span><o:p></o:p></pre>
<pre style=3D"margin-left:72.0pt"><span style=3D"font-family:&quot;var\(--a=
\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; [<a href=3D"https://tools.ietf.org/html/rfc3107#re=
f-MPLS-ENCAPS" title=3D"&quot;MPLS Label Stack Encoding&quot;">MPLS-ENCAPS<=
/a>]).</span><o:p></o:p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">&nbsp;</span><o:p></o:p></p>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span style=3D"font-fa=
mily:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">According to the de=
finition, the label field in RFC 4364 should be 3 bytes, &nbsp;but only 20 =
bits are used as the label value. So we may also use the entire 3 octets. <=
/span><o:p></o:p></pre>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span style=3D"font-fa=
mily:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">On the other hand, =
&nbsp;if only 20 bits are used, do we need to add the BoS flag to the part =
when do the transposition?</span><o:p></o:p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"mso-fare=
ast-language:ZH-CN">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<pre style=3D"margin-left:36.0pt;background:white"><span style=3D"font-fami=
ly:Consolas;color:#212529;mso-fareast-language:ZH-CN">Best Regards,</span><=
o:p></o:p></pre>
<pre style=3D"margin-left:36.0pt;background:white"><span style=3D"font-fami=
ly:Consolas;color:#212529;mso-fareast-language:ZH-CN">Haibo</span><o:p></o:=
p></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</span><o:p></o:p>=
</p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font-=
size:11.0pt;mso-fareast-language:ZH-CN">From:</span></b><span style=3D"font=
-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [<a href=3D"mailto:bess-boun=
ces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">This email starts a two-week working group =
last call for&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-far=
east-language:EN-GB">draft-ietf-bess-srv6-services-05
 [1]</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">Please review the draft and send any commen=
ts to the BESS list. Also, please indicate if you support publishing the dr=
aft as a standards track RFC.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&=
nbsp;December 2020.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">We are also&nbsp;polling for=
 knowledge of any undisclosed&nbsp;IPR&nbsp;that applies to this Document, =
to ensure that&nbsp;IPR&nbsp;has been disclosed in compliance with
 IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669 and 5378 for more deta=
ils).</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">If you are listed as an Auth=
or or a Contributor of this document please respond to this email and indic=
ate whether or not you are aware of any
 relevant undisclosed&nbsp;IPR. The Document won't progress without answers=
 from all the Authors and Contributors.&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">There is currently one&nbs=
p;IPR&nbsp;disclosure.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">In addition, we are pollin=
g for knowledge of implementations</span>
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">of =
this draft, per the BESS policy in [2]. &nbsp;&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">Thank you,</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</sp=
an><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">&nbsp;</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">[1]<span class=3D"apple-converted-space">&nbsp;=
</span></span><a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-s=
rv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servic=
es/</a><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">[2]<span class=3D"apple-converted-space">&nbsp;</span></span><a href=
=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw"=
 target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X=
1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tT=
qb_vPC4rg56SEdkjqDpw</a><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
</div>
</body>
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From: "Voyer, Daniel" <daniel.voyer@bell.ca>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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--_000_C23D6636AE134BD9AFFFB2C62C3EE4F8bellca_--


From nobody Thu Dec  3 06:52:19 2020
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From: IETF Secretariat <ietf-ipr@ietf.org>
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Subject: [bess] IPR Disclosure Huawei Technologies Co., Ltd's Statement about IPR related to draft-ietf-bess-srv6-services
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Dear Gaurav Dawra, Clarence Filsfils, Ketan Talaulikar, Robert Raszuk, Bruno Decraene, Shunwan Zhuang, Jorge Rabadan:


An IPR disclosure that pertains to your Internet-Draft entitled "SRv6 BGP
based Overlay services" (draft-ietf-bess-srv6-services) was submitted to the
IETF Secretariat on 2020-12-02 and has been posted on the "IETF Page of
Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/4520/). The title of the IPR disclosure is
"Huawei Technologies Co.,Ltd's Statement about IPR related to
draft-ietf-bess-srv6-services"


Thank you

IETF Secretariat



From nobody Thu Dec  3 06:52:34 2020
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Subject: [bess] IPR Disclosure Huawei Technologies Co., Ltd's Statement about IPR related to draft-ietf-bess-srv6-services
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Dear Gaurav Dawra, Clarence Filsfils, Ketan Talaulikar, Robert Raszuk, Bruno Decraene, Shunwan Zhuang, Jorge Rabadan:


An IPR disclosure that pertains to your Internet-Draft entitled "SRv6 BGP
based Overlay services" (draft-ietf-bess-srv6-services) was submitted to the
IETF Secretariat on 2020-12-02 and has been posted on the "IETF Page of
Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/4521/). The title of the IPR disclosure is
"Huawei Technologies Co.,Ltd's Statement about IPR related to
draft-ietf-bess-srv6-services"


Thank you

IETF Secretariat



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From: Dirk Steinberg <dirk@lapishills.com>
Date: Thu, 3 Dec 2020 18:16:15 +0200
Message-ID: <CAFqxzqayqyGr+11CsM5gvxHoZo9tCO0cqjh6K5Tu5hS8Xt6JUw@mail.gmail.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
Cc: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/SIXJqVtYElF_bAeQ4OAlkLqcciM>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi,

as a contributor I support the publication of this draft as standards track
RFC.
I am not aware of any undisclosed IPR(s).

Thanks,
Dirk


On Mon, Nov 30, 2020 at 7:15 PM Bocci, Matthew (Nokia - GB) <
matthew.bocci@nokia.com> wrote:

> This email starts a two-week working group last call for draft-ietf-bess-srv6-services-05
> [1]
>
>
>
> Please review the draft and send any comments to the BESS list. Also,
> please indicate if you support publishing the draft as a standards track
> RFC.
>
>
>
> This poll runs until Monday 14th December 2020.
>
>
>
> We are also polling for knowledge of any undisclosed IPR that applies to
> this Document, to ensure that IPR has been disclosed in compliance with
> IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
>
>
> If you are listed as an Author or a Contributor of this document please
> respond to this email and indicate whether or not you are aware of any
> relevant undisclosed IPR. The Document won't progress without answers from
> all the Authors and Contributors.
>
> There is currently one IPR disclosure.
>
>
>
> In addition, we are polling for knowledge of implementations of this
> draft, per the BESS policy in [2].
>
>
>
> Thank you,
>
> Matthew & Stephane
>
>
>
>
>
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
>
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw
>
>
>

--0000000000005c085005b591ae6c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi,<div><br></div><div>as a contributor I support=C2=A0the=
 publication of this draft as standards track RFC.</div><div>I am not aware=
 of any undisclosed IPR(s).<br></div><div><br></div><div>Thanks,</div><div>=
Dirk</div><div><br></div></div><br><div class=3D"gmail_quote"><div dir=3D"l=
tr" class=3D"gmail_attr">On Mon, Nov 30, 2020 at 7:15 PM Bocci, Matthew (No=
kia - GB) &lt;<a href=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@noki=
a.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">





<div lang=3D"EN-GB" style=3D"overflow-wrap: break-word;">
<div class=3D"gmail-m_9038125138617404799WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">This emai=
l starts a two-week working group last call for=C2=A0</span><span style=3D"=
color:black">draft-ietf-bess-srv6-services-05 [1]<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">Please re=
view the draft and send any comments to the BESS list. Also, please indicat=
e if you support publishing the draft as a standards track RFC.</span><span=
 style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">This=C2=
=A0poll=C2=A0runs until Monday 14th=C2=A0December 2020.</span><span style=
=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">We are also=C2=A0polling=
 for knowledge of any undisclosed=C2=A0IPR=C2=A0that applies to this Docume=
nt, to ensure that=C2=A0IPR=C2=A0has been disclosed in compliance with IETF=
=C2=A0IPR=C2=A0rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><u></u>=C2=A0<u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:black">If you are listed as an =
Author or a Contributor of this document please respond to this email and i=
ndicate whether or not you are aware of any relevant undisclosed=C2=A0IPR. =
The Document won&#39;t
 progress without answers from all the Authors and Contributors.=C2=A0<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">There is currently one=C2=A0IPR=C2=A0disclosure.<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">In addition, we are polling for knowledge of implementations</span><s=
pan lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11pt;color:black">of this dr=
aft, per the BESS policy in [2]. =C2=A0=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><u></u>=C2=A0<u></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">Thank you,</span><span style=3D"color:black"><u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">Matthew &amp; Stephane</span><span style=3D"color:black"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps:normal;text-align:start;w=
ord-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"gmail-m_903812=
5138617404799apple-converted-space">=C2=A0<a href=3D"https://datatracker.ie=
tf.org/doc/draft-ietf-bess-srv6-services/" target=3D"_blank">https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/</a><u></u><u></u></span><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"gmail-m_9038125138617404799apple-converted-space">=C2=A0</span><a =
href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56=
SEdkjqDpw" target=3D"_blank">https://mailarchive.ietf.org/arch/msg/bess/cG3=
X1tTqb_vPC4rg56SEdkjqDpw</a></span><span style=3D"color:black"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
</div>

</blockquote></div>

--0000000000005c085005b591ae6c--


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To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/oFrHW7YR0_wPBI4yCsJJyrNTw9U>
Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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Support as co-author.
Not aware of IPRs.

Thanks.
Jeffrey

From: slitkows.ietf@gmail.com <slitkows.ietf@gmail.com>
Sent: Tuesday, December 1, 2020 4:31 AM
To: bess@ietf.org; draft-skr-bess-evpn-redundant-mcast-source@ietf.org
Subject: WG adoption for draft-skr-bess-evpn-redundant-mcast-source

[External Email. Be cautious of content]

Hello,

This email begins a two-weeks WG adoption poll for draft-skr-bess-evpn-redu=
ndant-mcast-source<https://urldefense.com/v3/__http:/tools.ietf.org/html/dr=
aft-skr-bess-evpn-redundant-mcast-source__;!!NEt6yMaO-gk!Q4i6MEQlNE_wdTNiuj=
ubjnwkB5AUn8IgOIwq4yJbQDRP2gJF6C8wJ_sV9U_j2tBk$> [1].

Please review the draft and post any comments to the BESS working group lis=
t.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.

Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.

This poll for adoption closes on 15th December 2020.

Regards,
Matthew and Stephane

[1]  https://datatracker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-s=
ource/<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-sk=
r-bess-evpn-redundant-mcast-source/__;!!NEt6yMaO-gk!Q4i6MEQlNE_wdTNiujubjnw=
kB5AUn8IgOIwq4yJbQDRP2gJF6C8wJ_sV9fxTi1MI$>






Juniper Business Use Only

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Support as co-author.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Not aware of IPRs.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;mso-fareast-langu=
age:ZH-CN">From:</span></b><span style=3D"font-size:11.0pt;mso-fareast-lang=
uage:ZH-CN"> slitkows.ietf@gmail.com &lt;slitkows.ietf@gmail.com&gt;
<br>
<b>Sent:</b> Tuesday, December 1, 2020 4:31 AM<br>
<b>To:</b> bess@ietf.org; draft-skr-bess-evpn-redundant-mcast-source@ietf.o=
rg<br>
<b>Subject:</b> WG adoption for draft-skr-bess-evpn-redundant-mcast-source<=
o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"line-height:12.0pt;background:#FFEB9C"><b><=
span lang=3D"FR" style=3D"font-size:10.5pt;font-family:&quot;Lato&quot;,san=
s-serif;color:black;mso-fareast-language:ZH-CN">[External Email. Be cautiou=
s of content]<o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><span lang=3D"FR" style=3D"font-size:11.0pt;mso-fare=
ast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hello,</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">This email begins a two-weeks WG&nbsp;adoption&=
nbsp;poll<span class=3D"apple-converted-space">&nbsp;</span>for<span class=
=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"FR"><a href=3D=
"https://urldefense.com/v3/__http:/tools.ietf.org/html/draft-skr-bess-evpn-=
redundant-mcast-source__;!!NEt6yMaO-gk!Q4i6MEQlNE_wdTNiujubjnwkB5AUn8IgOIwq=
4yJbQDRP2gJF6C8wJ_sV9U_j2tBk$"><span lang=3D"EN-US" style=3D"font-size:10.0=
pt;font-family:&quot;Verdana&quot;,sans-serif;color:#BB0000;background:whit=
e;text-decoration:none">draft-skr-bess-evpn-redundant-mcast-source</span></=
a><span style=3D"color:black">
</span></span><span style=3D"color:black">[1].</span><span lang=3D"EN-GB" s=
tyle=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Please review the draft and post any comments t=
o the BESS working group list.</span><span lang=3D"EN-GB" style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">We are also&nbsp;polling for knowledge of any u=
ndisclosed IPR that applies to this document, to ensure that IPR has been d=
isclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5=
378 for more details).</span><span lang=3D"EN-GB" style=3D"color:black"><o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">If you are listed as an author or a contributor=
 of this document, please respond to this email and indicate whether or not=
 you are aware of any relevant undisclosed IPR, copying the BESS mailing li=
st. The document will not &nbsp;progress
 without answers from all of the authors and contributors.</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Currently, there are no IPR disclosures against=
 this document.</span><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">If you are not listed as an author or a contrib=
utor, then please explicitly respond only if you are aware of any IPR that =
has not yet been disclosed in conformance with IETF rules.</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">This<span class=3D"apple-converted-space">&nbsp=
;</span>poll<span class=3D"apple-converted-space">&nbsp;</span>for&nbsp;ado=
ption&nbsp;closes on 15th<span class=3D"apple-converted-space">&nbsp;</span=
>December 2020.</span><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Regards,</span><span lang=3D"EN-GB" style=3D"co=
lor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">Matthew and Stephane</span><span lang=3D"EN-GB"=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">[1]&nbsp; </span><span lang=3D"EN-GB" style=3D"=
color:black"><a href=3D"https://urldefense.com/v3/__https:/datatracker.ietf=
.org/doc/draft-skr-bess-evpn-redundant-mcast-source/__;!!NEt6yMaO-gk!Q4i6ME=
QlNE_wdTNiujubjnwkB5AUn8IgOIwq4yJbQDRP2gJF6C8wJ_sV9fxTi1MI$">https://datatr=
acker.ietf.org/doc/draft-skr-bess-evpn-redundant-mcast-source/</a><o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</div>
<br>
<p style=3D"font-family:Calibri;font-size:7pt;color:#000000;margin:15pt;" a=
lign=3D"Center">
Juniper Business Use Only<br>
</p>
</body>
</html>

--_000_MN2PR05MB59817DF14409F82F09533F0ED4F20MN2PR05MB5981namp_--


From nobody Fri Dec  4 12:59:51 2020
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Subject: [bess] Genart last call review of draft-ietf-bess-evpn-proxy-arp-nd-09
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Reviewer: Russ Housley
Review result: Almost Ready

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.

Document: draft-ietf-bess-evpn-proxy-arp-nd-09
Reviewer: Russ Housley
Review Date: 2020-12-04
IETF LC End Date: 2020-12-15
IESG Telechat date: unknown


Summary: Almost Ready


Major Concerns:

There is a normative downward reference to Informational RFC 6820.
It looks to me like this should be an informative reference.


Minor Concerns:

The Abstract seems very long.  I suggest:

   This document describes the EVPN Proxy-ARP/ND function, augmented
   by the capability of the ARP/ND Extended Community.  Together,
   these help operators of Internet Exchange Points (IXPs), Data
   Centers (DCs), and other networks deal with IPv4 and IPv6 address
   resolution issues associated with large Broadcast Domains (DBs) by
   reducing and even suppressing the flooding produced by address
   resolution in the EVPN network.

 
Nits:

When there is a line break in the middle of "->", it is quite difficult
to read.  I hope there is a way to make the hyphen non-breaking.

s2.2: s/devices and therefore floods/devices, and therefore, floods/

s2.2: s/messages, however ARP/messages; however, ARP/

s6.5: s/IXP's peering network space/IXP peering network space/

s7: s/flooded, however the/flooded; however, the/

s7: s/will definitely protect/protects/


IDnits reports:

  == The 'Updates: ' line in the draft header should list only the _numbers_
     of the RFCs which will be updated by this document (if approved); it
     should not include the word 'RFC' in the list.




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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Hi Rabadan &amp; Ketan,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; I agree that the present description is clear.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:5.25pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; At the EANTC 2020 test, we found that the NX-OS has i=
mplement the transposition as 24bits for IPv4 VPN, &nbsp;and it will parse
 a 20bits transposition as a wrong value. <o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:5.25pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:5.25pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp; If we all agree on this description, I think it=
's okay.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Haibo<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> Rabadan, Jorge (Nokia - US/Mount=
ain View) [mailto:jorge.rabadan@nokia.com]
<br>
<b>Sent:</b> Thursday, December 3, 2020 9:50 PM<br>
<b>To:</b> Ketan Talaulikar (ketant) &lt;ketant@cisco.com&gt;; Wanghaibo (R=
ainsword) &lt;rainsword.wang@huawei.com&gt;; Bocci, Matthew (Nokia - GB) &l=
t;matthew.bocci@nokia.com&gt;; draft-ietf-bess-srv6-services@ietf.org; bess=
@ietf.org<br>
<b>Subject:</b> Re: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Hi Haibo,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">I agree with Ketan=A1=AD furthermore, the spec clearly def=
ines the structure sub-sub-TLV, where the transposition length and offset a=
re needed; it also defines how to place those
 bits into the label field of the NLRI, irrespective of the transposition l=
ength being 24 or 20 or anything different.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Out of interest, how can that lead to interop issues? Can =
you please elaborate?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:Consolas"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span lang=3D"EN-US" style=3D"color:black">From: </span></b><span lang=
=3D"EN-US" style=3D"color:black">Ketan Talaulikar (ketant) &lt;<a href=3D"m=
ailto:ketant@cisco.com">ketant@cisco.com</a>&gt;<br>
<b>Date: </b>Thursday, December 3, 2020 at 11:25 AM<br>
<b>To: </b>Wanghaibo (Rainsword) &lt;<a href=3D"mailto:rainsword.wang@huawe=
i.com">rainsword.wang@huawei.com</a>&gt;, Bocci, Matthew (Nokia - GB) &lt;<=
a href=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;,
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a> &lt;<a href=3D"mailto:draft-ietf-bess-srv6-servic=
es@ietf.org">draft-ietf-bess-srv6-services@ietf.org</a>&gt;,
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;<a href=3D"mailto:be=
ss@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Hi Haibo,</span><span lang=3D"EN-US"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">This is not a change but a clarification to avoid =
exactly those kind of issues.</span><span lang=3D"EN-US"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Thanks,</span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Ketan</span><span lang=3D"EN-US"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span lang=3D"EN-US"=
 style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN">From:</span></b><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN"> Wan=
ghaibo (Rainsword) &lt;<a href=3D"mailto:rainsword.wang@huawei.com">rainswo=
rd.wang@huawei.com</a>&gt;
<br>
<b>Sent:</b> 03 December 2020 15:39<br>
<b>To:</b> Ketan Talaulikar (ketant) &lt;<a href=3D"mailto:ketant@cisco.com=
">ketant@cisco.com</a>&gt;; Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mail=
to:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">Hi Ketan,=
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thanks for your reply.</span><span =
lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">RFC 8277 has clearly described that the label field is only 20 bi=
ts.
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">At the beginning, we consider it to use the 20-bits to do the tra=
nsposition. But in some interconnection
 tests, some vendors are use the 24-bits to do the transposition.</span><sp=
an lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:5.5pt"><span=
 lang=3D"EN-US" style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-languag=
e:ZH-CN">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;text-indent:16.5pt"><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">So I=A1=AFm worried about that the change may cause incompatible =
interop.
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">Regards</=
span><span style=3D"font-size:11.0pt;font-family:=CB=CE=CC=E5;color:#1F497D=
;mso-fareast-language:ZH-CN">=A3=AC</span><span lang=3D"EN-US"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:#1F497D;mso-fareast-language:ZH-CN">Haibo</sp=
an><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span lang=3D"EN-US"=
 style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN">From:</span></b><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN"> Ket=
an Talaulikar (ketant) [<a href=3D"mailto:ketant@cisco.com">mailto:ketant@c=
isco.com</a>]
<br>
<b>Sent:</b> Thursday, December 3, 2020 5:01 PM<br>
<b>To:</b> Wanghaibo (Rainsword) &lt;<a href=3D"mailto:rainsword.wang@huawe=
i.com">rainsword.wang@huawei.com</a>&gt;; Bocci, Matthew (Nokia - GB) &lt;<=
a href=3D"mailto:matthew.bocci@nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Hi Haibo,</span><span lang=3D"EN-US"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">This clarification was explicitly added based on f=
eedback that the authors received.</span><span lang=3D"EN-US"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">This document does not change the definition of th=
e Label Field of RFC4364 and so it has always been 20 bits. There has been =
this text about 24-bit in other parts of
 the draft since RFC7432 allows that.</span><span lang=3D"EN-US"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">If you see the previous versions of this document,=
 the encoding of the label was also previously clarified with a reference t=
o RFC8277.</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Regarding the BOS bit, the clarification is provid=
ed by RFC8277. Previously, this was under-specified by RFC3107. There are i=
mplementations around that do not check/examine
 the BOS field and assume a single label. You can see some of this history =
captured in RFC8277.</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Thanks,</span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">Ketan</span><span lang=3D"EN-US"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span lang=3D"EN-US"=
 style=3D"font-size:11.0pt;mso-fareast-language:EN-IN">From:</span></b><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:EN-IN"> Wan=
ghaibo (Rainsword) &lt;<a href=3D"mailto:rainsword.wang@huawei.com">rainswo=
rd.wang@huawei.com</a>&gt;
<br>
<b>Sent:</b> 03 December 2020 09:13<br>
<b>To:</b> Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@=
nokia.com">matthew.bocci@nokia.com</a>&gt;;
<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-s=
rv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">Dear authors and all,</=
span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbs=
p;</span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN"> I f=
ind the following changes in the new version, which may cause incompatible =
changes in the implemented version.</span><span lang=3D"EN-US"><o:p></o:p><=
/span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;mso-fareast-language:ZH-CN"><img border=3D"0" width=
=3D"1316" height=3D"73" id=3D"=CD=BC=C6=AC_x0020_1" src=3D"cid:image001.png=
@01D6CAE5.829FA370"></span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">The =
label field described in RFC4364:</span><span lang=3D"EN-US"><o:p></o:p></s=
pan></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">&nbsp;</span><span lang=3D"EN-US"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">4.3.4. How VPN-IPv4 NLRI Is Carried in B=
GP</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;&nbsp; The labele=
d VPN-IPv4 NLRI itself is encoded as specified in</span><span lang=3D"EN-US=
"><o:p></o:p></span></pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;&nbsp; [<a href=
=3D"https://tools.ietf.org/html/rfc4364#ref-MPLS-BGP" title=3D"&quot;Carryi=
ng Label Information in BGP-4&quot;"><span style=3D"color:windowtext">MPLS-=
BGP</span></a>], where the prefix consists of an 8-byte RD followed by an</=
span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbsp;&nbsp; IPv4 prefi=
x.</span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">&nbs=
p;RFC 3107 describe the label field:</span><span lang=3D"EN-US"><o:p></o:p>=
</span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">&nbsp;</span><span lang=3D"EN-US"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:72.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">3. Carrying Label Mapping Information</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; b) Label:</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The Label field carries one or more=
 labels (that corresponds to</span><span lang=3D"EN-US"><o:p></o:p></span><=
/pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the stack of labels [<a href=3D"htt=
ps://tools.ietf.org/html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS Label=
 Stack Encoding&quot;">MPLS-ENCAPS</a>]).&nbsp; <b>Each label is encoded as=
 3</b></span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:72.0pt"><b><span lang=3D"EN-US" style=3D"font-fam=
ily:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; octets,</span></b><span lang=3D"=
EN-US" style=3D"font-family:&quot;var\(--a\)&quot;;color:#404040;mso-fareas=
t-language:ZH-CN"> where the high-order 20 bits contain the label value,</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and the low order bit contains &quo=
t;Bottom of Stack&quot; (as defined in</span><span lang=3D"EN-US"><o:p></o:=
p></span></pre>
<pre style=3D"margin-left:72.0pt"><span lang=3D"EN-US" style=3D"font-family=
:&quot;var\(--a\)&quot;;color:#404040;mso-fareast-language:ZH-CN">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<a href=3D"https://tools.ietf.org/=
html/rfc3107#ref-MPLS-ENCAPS" title=3D"&quot;MPLS Label Stack Encoding&quot=
;">MPLS-ENCAPS</a>]).</span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">&nbsp;</span><span lang=3D"EN-US"><o:p><=
/o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">Acco=
rding to the definition, the label field in RFC 4364 should be 3 bytes, &nb=
sp;but only 20 bits are used as the label value. So we may also use the ent=
ire 3 octets. </span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;text-indent:18.0pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;var\(--a\)&quot;;mso-fareast-language:ZH-CN">On t=
he other hand, &nbsp;if only 20 bits are used, do we need to add the BoS fl=
ag to the part when do the transposition?</span><span lang=3D"EN-US"><o:p><=
/o:p></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"mso-fareast-language:ZH-CN">&nbsp;</span><span lang=3D"EN-US"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;background:white"><span lang=3D"EN-US" sty=
le=3D"font-family:Consolas;color:#212529;mso-fareast-language:ZH-CN">Best R=
egards,</span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;background:white"><span lang=3D"EN-US" sty=
le=3D"font-family:Consolas;color:#212529;mso-fareast-language:ZH-CN">Haibo<=
/span><span lang=3D"EN-US"><o:p></o:p></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span lang=3D"EN-US"=
 style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN">From:</span></b><spa=
n lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN"> BES=
S [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a=
>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05</span><span lang=3D"EN-US"><o:p></o:p></span></p=
>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black;mso-fareast-language:EN-GB">This email starts a two-week=
 working group last call for&nbsp;</span><span lang=3D"EN-GB" style=3D"colo=
r:black;mso-fareast-language:EN-GB">draft-ietf-bess-srv6-services-05
 [1]</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black;mso-fareast-language:EN-GB">Please review the draft and =
send any comments to the BESS list. Also, please indicate if you support pu=
blishing the draft as a standards track
 RFC.</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black;mso-fareast-language:EN-GB">This&nbsp;poll&nbsp;runs unt=
il Monday 14th&nbsp;December 2020.</span><span lang=3D"EN-US"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">We are also&nbsp;polling for=
 knowledge of any undisclosed&nbsp;IPR&nbsp;that applies to this Document, =
to ensure that&nbsp;IPR&nbsp;has been disclosed in compliance with
 IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669 and 5378 for more deta=
ils).</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">If you are listed as an Auth=
or or a Contributor of this document please respond to this email and indic=
ate whether or not you are aware of any
 relevant undisclosed&nbsp;IPR. The Document won't progress without answers=
 from all the Authors and Contributors.&nbsp;</span><span lang=3D"EN-US"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">There is cu=
rrently one&nbsp;IPR&nbsp;disclosure.</span><span lang=3D"EN-US"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">&nbsp;</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">In addition=
, we are polling for knowledge of implementations</span><span lang=3D"EN-US=
">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
/span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"E=
N-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">Thank you,<=
/span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">Matthew &am=
p; Stephane</span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">&nbsp;</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-US" st=
yle=3D"color:black">[2]<span class=3D"apple-converted-space">&nbsp;</span><=
/span><span lang=3D"EN-US"><a href=3D"https://mailarchive.ietf.org/arch/msg=
/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://maila=
rchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarch=
ive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
</div>
</body>
</html>

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From nobody Fri Dec  4 17:11:45 2020
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From: "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Sat, 5 Dec 2020 01:11:34 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Matthew & Stephane,

Support for publication.

Thanks,
Haibo


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN">Hi Matthew &amp; Stephane,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:4.5pt;background:white"><span l=
ang=3D"EN-US" style=3D"font-size:9.0pt;font-family:Consolas;color:#212529;m=
so-fareast-language:ZH-CN">Support for publication.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN">Haibo<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: "Zafar Ali (zali)" <zali@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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From: wangzitao <wangzitao@huawei.com>
To: "Wanghaibo (Rainsword)" <rainsword.wang@huawei.com>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Mon, 7 Dec 2020 01:14:37 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Support &#43;1
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">B.R.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Michael<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;mso-fareast-language:ZH-CN">=B7=
=A2=BC=FE=C8=CB<span lang=3D"EN-US">:</span></span></b><span lang=3D"EN-US"=
 style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;=
,sans-serif;mso-fareast-language:ZH-CN"> BESS
 [mailto:bess-bounces@ietf.org] </span><b><span style=3D"font-size:11.0pt;f=
ont-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;mso-fareast-lang=
uage:ZH-CN">=B4=FA=B1=ED
</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot=
;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;mso-fareast-language:ZH-CN">Wang=
haibo (Rainsword)<br>
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif;mso-fareast-language:ZH-CN">=B7=A2=CB=CD=CA=B1=
=BC=E4<span lang=3D"EN-US">:</span></span></b><span lang=3D"EN-US" style=3D=
"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-ser=
if;mso-fareast-language:ZH-CN"> 2020</span><span style=3D"font-size:11.0pt;=
font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;mso-fareast-lan=
guage:ZH-CN">=C4=EA<span lang=3D"EN-US">12</span>=D4=C2<span lang=3D"EN-US"=
>5</span>=C8=D5<span lang=3D"EN-US">
 9:12<br>
</span><b>=CA=D5=BC=FE=C8=CB<span lang=3D"EN-US">:</span></b><span lang=3D"=
EN-US"> Bocci, Matthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt;; draft-=
ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
</span><b>=D6=F7=CC=E2<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-=
srv6-services-05<o:p></o:p></span></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN">Hi Matthew &amp; Stephane,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:4.5pt;background:white"><span l=
ang=3D"EN-US" style=3D"font-size:9.0pt;font-family:Consolas;color:#212529;m=
so-fareast-language:ZH-CN">Support for publication.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span lang=3D"EN-US" styl=
e=3D"font-size:9.0pt;font-family:Consolas;color:#212529;mso-fareast-languag=
e:ZH-CN">Haibo<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: "Chengli (Cheng Li)" <c.l@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Mon, 7 Dec 2020 01:50:14 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi WG,

I support this adoption, and I am not aware of any non-disclosed IPR except=
 the one has been announced.

Thanks,
Cheng


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Hi WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">I support this adoption, and I am not aware of any no=
n-disclosed IPR except the one has been announced.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Cheng<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;mso-fareast-langu=
age:ZH-CN">From:</span></b><span style=3D"font-size:11.0pt;mso-fareast-lang=
uage:ZH-CN"> BESS [mailto:bess-bounces@ietf.org]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This email starts a two-week working group last call for&nbsp;</span><sp=
an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">draft-ie=
tf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">Please review the draft and send any comments to the BESS list. Also, pl=
ease indicate if you support publishing the draft as a standards track RFC.=
</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.</span><sp=
an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">In addition, we are polling for knowledge of implementa=
tions</span>
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">of =
this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" style=3D"color:bl=
ack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Matthew &amp; Stephane</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">[1]<span class=3D"apple-converted-space">&nbsp;=
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/"=
>https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/</a></span>=
</span><span class=3D"apple-converted-space"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">[2]<span class=3D"apple-=
converted-space">&nbsp;</span><a href=3D"https://mailarchive.ietf.org/arch/=
msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://ma=
ilarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://maila=
rchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span l=
ang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: Chenshuanglong <chenshuanglong@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Mon, 7 Dec 2020 02:01:04 +0000
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Support for publication

Thanks.
Shuanglong

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-bess-srv6-serv=
ices@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-f=
areast-language:ZH-CN">Support for publication<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-f=
areast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-f=
areast-language:ZH-CN">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-f=
areast-language:ZH-CN">Shuanglong</span><span lang=3D"EN-US" style=3D"font-=
size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [</span><span lang=3D"EN-US=
"><a href=3D"mailto:bess-bounces@ietf.org"><span style=3D"font-size:11.0pt;=
mso-fareast-language:ZH-CN">mailto:bess-bounces@ietf.org</span></a></span><=
span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN">]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> </span><span lang=3D"EN-US"><a href=3D"mailto:draft-ietf-bess-sr=
v6-services@ietf.org"><span style=3D"font-size:11.0pt;mso-fareast-language:=
ZH-CN">draft-ietf-bess-srv6-services@ietf.org</span></a></span><span lang=
=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN">;
</span><span lang=3D"EN-US"><a href=3D"mailto:bess@ietf.org"><span style=3D=
"font-size:11.0pt;mso-fareast-language:ZH-CN">bess@ietf.org</span></a></spa=
n><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:ZH-CN=
"><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><span lang=3D"EN-US"><a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</a><span class=3D"apple-converted-s=
pace"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><span lang=3D"EN-US"><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" target=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
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From nobody Mon Dec  7 08:32:41 2020
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From: "PEIRENS Bart (NSP/MST)" <bart.peirens@proximus.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Mon, 7 Dec 2020 16:32:29 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Chairs,


I'm not aware of any relevant undisclosed IPR and as a contributor, I suppo=
rt the publication of this document as standard track RFC.



Regards

Bart



Sensitivity: Internal Use Only
From: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Sent: Monday, November 30, 2020 6:16 PM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw

This e-mail cannot be used for other purposes than Proximus business use. S=
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<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
9.0pt;font-family:Consolas;color:#212529;mso-fareast-language:EN-GB">Hi Cha=
irs,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
9.0pt;font-family:Consolas;color:#212529;mso-fareast-language:EN-GB"><o:p>&=
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<pre style=3D"background:white"><span style=3D"font-size:9.0pt;font-family:=
Consolas;color:#212529">I&#8217;m not aware of any relevant undisclosed IPR=
 and as a contributor, I support the publication of this document as standa=
rd track RFC.<o:p></o:p></span></pre>
<pre style=3D"background:white"><span style=3D"font-size:9.0pt;font-family:=
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<pre style=3D"background:white"><span style=3D"font-size:9.0pt;font-family:=
Consolas;color:#212529">Regards<o:p></o:p></span></pre>
<pre style=3D"background:white"><span style=3D"font-size:9.0pt;font-family:=
Consolas;color:#212529">Bart</span><span style=3D"font-size:11.0pt;font-fam=
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<span style=3D"font-size:7.0pt;color:#737373">Sensitivity: Internal Use Onl=
y</span><o:p></o:p></p>
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<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:EN-GB">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:EN-GB"> Bocci, Matthew (Nokia - GB) &lt;=
matthew.bocci@nokia.com&gt;
<br>
<b>Sent:</b> Monday, November 30, 2020 6:16 PM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span style=3D"color:black;mso-fareast-language:EN-GB">draft-ie=
tf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;=
that applies to this Document, to ensure that&nbsp;IPR&nbsp;has been disclo=
sed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">If you are listed as an Author or a Contributor of this document please =
respond to this email and indicate whether or not you are aware of any rele=
vant undisclosed&nbsp;IPR. The Document won't
 progress without answers from all the Authors and Contributors.&nbsp;<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-lan=
guage:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servi=
ces/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"E=
N-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
</div>
<div align=3D"center"><span style=3D"font-size:9.0pt;font-family:Calibri;co=
lor:#737373">This e-mail cannot be used for other purposes than Proximus bu=
siness use. See more on https://www.proximus.be/maildisclaimer<br>
</div>
</span>
</body>
</html>

--_000_AM0PR08MB3202C3BD04ADB476BFD6F694FFCE0AM0PR08MB3202eurp_--


From nobody Mon Dec  7 16:50:51 2020
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Date: Mon, 7 Dec 2020 19:50:35 -0500 (EST)
From: "john leddy.net" <john@leddy.net>
Reply-To: "john leddy.net" <john@leddy.net>
To: "bess@ietf.org" <bess@ietf.org>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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As a contributor, I am not aware of any undisclosed IPR related to this document.

From: Bocci, Matthew (Nokia - GB) mailto:matthew.bocci@nokia.com
Date: Monday, November 30, 2020 at 12:15 PM
To: draft-ietf-bess-srv6-services@ietf.org mailto:draft-ietf-bess-srv6-services@ietf.org , bess@ietf.org mailto:bess@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
Resent-From: < alias-bounces@ietf.org mailto:alias-bounces@ietf.org >



This email starts a two-week working group last call for draft-ietf-bess-srv6-services-05 [1]



Please review the draft and send any comments to the BESS list. Also, please indicate if you support publishing the draft as a standards track RFC.



This poll runs until Monday 14th December 2020.



We are also polling for knowledge of any undisclosed IPR that applies to this Document, to ensure that IPR has been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).



If you are listed as an Author or a Contributor of this document please respond to this email and indicate whether or not you are aware of any relevant undisclosed IPR. The Document won't progress without answers from all the Authors and Contributors. 

There is currently one IPR disclosure.



In addition, we are polling for knowledge of implementations of this draft, per the BESS policy in [2].   



Thank you,

Matthew & Stephane





[1]  https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/

[2]  https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw




------=_Part_50321_1627637335.1607388635813
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<html>
 <head> 
  <meta charset="UTF-8"> 
 </head>
 <body>
  <div class="default-style">
   As a contributor, I am not aware of any undisclosed IPR related to this document.
  </div>
  <div class="default-style">
   <br>
  </div>
  <div class="default-style">
   <div>
    <strong>From: </strong>
    <a href="mailto:matthew.bocci@nokia.com">Bocci, Matthew (Nokia - GB)</a>
    <br>
    <strong>Date: </strong>Monday, November 30, 2020 at 12:15 PM
    <br>
    <strong>To: </strong>
    <a href="mailto:draft-ietf-bess-srv6-services@ietf.org">draft-ietf-bess-srv6-services@ietf.org</a>, 
    <a href="mailto:bess@ietf.org">bess@ietf.org</a>
    <br>
    <strong>Subject: </strong>WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
    <br>
    <strong>Resent-From: </strong>&lt;
    <a href="mailto:alias-bounces@ietf.org">alias-bounces@ietf.org</a>&gt;
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    This email starts a two-week working group last call for&nbsp;draft-ietf-bess-srv6-services-05 [1]
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    Please review the draft and send any comments to the BESS list. Also, please indicate if you support publishing the draft as a standards track RFC.
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    If you are listed as an Author or a Contributor of this document please respond to this email and indicate whether or not you are aware of any relevant undisclosed&nbsp;IPR. The Document won't progress without answers from all the Authors and Contributors.&nbsp;
   </div>
   <div>
    <br>
   </div>
   <div>
    There is currently one&nbsp;IPR&nbsp;disclosure.
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    In addition, we are polling for knowledge of implementations of this draft, per the BESS policy in [2]. &nbsp;&nbsp;
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    Thank you,
   </div>
   <div>
    <br>
   </div>
   <div>
    Matthew &amp; Stephane
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    [1]&nbsp;
    <a href="https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/</a>
   </div>
   <div>
    <br>
   </div>
   <div>
    [2]&nbsp;
    <a href="https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
   <div>
    <br>
   </div>
  </div> 
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</html>
------=_Part_50321_1627637335.1607388635813--


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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charse=
t=3Dutf-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; =
margin-bottom: 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-botto=
m: 0px; }div.FoxDiv20201208092214708305 { }body { font-size: 10.5pt; font-=
family: 'Microsoft YaHei UI'; color: rgb(0, 0, 0); line-height: 1.5; }</st=
yle></head><body>=0A<!--[if gte mso 9]><xml>=0A<o:shapedefaults v:ext=3D"e=
dit" spidmax=3D"1026" ></o:shapedefaults>=0A</xml><![endif]--><!--[if gte =
mso 9]><xml>=0A<o:shapelayout v:ext=3D"edit">=0A<o:idmap v:ext=3D"edit" da=
ta=3D"1" ></o:idmap>=0A</o:shapelayout></xml><![endif]-->=0A<div><span></s=
pan>Hi, all</div><div><br></div><div><span style=3D"color: rgb(0, 0, 0); b=
ackground-color: rgba(0, 0, 0, 0);">&nbsp; &nbsp; I support</span><span mi=
crosoft=3D"" yahei=3D"" ui';=3D"" font-size:=3D"" 14px;=3D"" color:=3D"" r=
gb(0,=3D"" 0,=3D"" 0);=3D"" background-color:=3D"" rgba(0,=3D"" font-weigh=
t:=3D"" normal;=3D"" font-style:=3D"" normal;text-decoration:=3D"" none;'=
=3D"">&nbsp;publishing&nbsp;the&nbsp;draft&nbsp;as&nbsp;a&nbsp;standards&n=
bsp;track&nbsp;RFC.</span></div><div><span microsoft=3D"" yahei=3D"" ui';=
=3D"" font-size:=3D"" 14px;=3D"" color:=3D"" rgb(0,=3D"" 0,=3D"" 0);=3D"" =
background-color:=3D"" rgba(0,=3D"" font-weight:=3D"" normal;=3D"" font-st=
yle:=3D"" normal;text-decoration:=3D"" none;'=3D""><br></span></div><div><=
span microsoft=3D"" yahei=3D"" ui';=3D"" font-size:=3D"" 14px;=3D"" color:=
=3D"" rgb(0,=3D"" 0,=3D"" 0);=3D"" background-color:=3D"" rgba(0,=3D"" fon=
t-weight:=3D"" normal;=3D"" font-style:=3D"" normal;text-decoration:=3D"" =
none;'=3D"">Best Regards</span></div><div><span microsoft=3D"" yahei=3D"" =
ui';=3D"" font-size:=3D"" 14px;=3D"" color:=3D"" rgb(0,=3D"" 0,=3D"" 0);=
=3D"" background-color:=3D"" rgba(0,=3D"" font-weight:=3D"" normal;=3D"" f=
ont-style:=3D"" normal;text-decoration:=3D"" none;'=3D"">Zongpeng Du</span=
></div>=0A<div><br></div><hr style=3D"width: 210px; height: 1px;" color=3D=
"#b5c4df" size=3D"1" align=3D"left">=0A<div><span><div style=3D"margin: 10=
px;"><div><a href=3D"mailto:duzongpeng@foxmail.com" style=3D"font-family: =
verdana; font-size: 13.3333px; background-color: transparent;">duzongpeng@=
foxmail.com</a><span style=3D"font-family: verdana; font-size: 13.3333px; =
color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">&nbsp;&amp;&nbsp=
;</span><span style=3D"background-color: transparent; font-size: 13.3333px=
; line-height: 20px;"><font face=3D"verdana">duzongpeng@chinamobile.com</f=
ont></span></div><font face=3D"verdana"><span style=3D"font-size: 13.3333p=
x; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0); font-size: 13.=
3333px;"></span></font></div></span></div>=0A<blockquote style=3D"margin-T=
op: 0px; margin-Bottom: 0px; margin-Left: 0.5em"><div>&nbsp;</div><div><di=
v class=3D"FoxDiv20201208092214708305"><div class=3D"WordSection1" style=
=3D"page: WordSection1;">=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><b style=
=3D"font-size: 12pt; line-height: 1.5; background-color: transparent;"><sp=
an lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:EN-GB">Fr=
om:</span></b><span lang=3D"EN-US" style=3D"font-size: 11pt; background-co=
lor: transparent;"> Bocci, Matthew (Nokia - GB) &lt;matthew.bocci@nokia.co=
m&gt;&nbsp;</span></p><div><div style=3D"border:none;border-top:solid #E1E=
1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class=3D"MsoNormal" style=3D"margi=
n: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><=
span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:EN-GB">=
=0A<b>Sent:</b> Monday, November 30, 2020 6:16 PM<br>=0A<b>To:</b> draft-i=
etf-bess-srv6-services@ietf.org; bess@ietf.org<br>=0A<b>Subject:</b> WG La=
st Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05<=
o:p></o:p></span></p>=0A</div>=0A</div>=0A<p class=3D"MsoNormal" style=3D"=
margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: Calibri, sans-seri=
f;"><o:p>&nbsp;</o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><span lang=
=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">This email sta=
rts a two-week working group last call for&nbsp;</span><span style=3D"colo=
r:black;mso-fareast-language:EN-GB">draft-ietf-bess-srv6-services-05 [1]<o=
:p></o:p></span></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0=
001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><span style=3D"=
color:black;mso-fareast-language:EN-GB">&nbsp;<o:p></o:p></span></p>=0A<p =
class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; fo=
nt-family: Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black=
;mso-fareast-language:EN-GB">Please review the draft and send any comments=
 to the BESS list. Also, please indicate if you support publishing the dra=
ft as a standards track RFC.</span><span style=3D"color:black;mso-fareast-=
language:EN-GB"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" style=3D"m=
argin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif=
;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">&=
nbsp;</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></=
o:p></span></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt=
; font-size: 12pt; font-family: Calibri, sans-serif;"><span lang=3D"EN-US"=
 style=3D"color:black;mso-fareast-language:EN-GB">This&nbsp;poll&nbsp;runs=
 until Monday 14th&nbsp;December 2020.</span><span style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: Calibri, =
sans-serif;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-languag=
e:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-language:EN-G=
B"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0c=
m 0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><span styl=
e=3D"color:black;mso-fareast-language:EN-GB">We are also&nbsp;polling for =
knowledge of any undisclosed&nbsp;IPR&nbsp;that applies to this Document, =
to ensure that&nbsp;IPR&nbsp;has been disclosed in compliance with IETF&nb=
sp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669=0A and 5378 for more details)=
.<o:p></o:p></span></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><span style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>=
=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12=
pt; font-family: Calibri, sans-serif;"><span style=3D"color:black;mso-fare=
ast-language:EN-GB">If you are listed as an Author or a Contributor of thi=
s document please respond to this email and indicate whether or not you ar=
e aware of any relevant undisclosed&nbsp;IPR. The Document won't=0A progre=
ss without answers from all the Authors and Contributors.&nbsp;<o:p></o:p>=
</span></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; fo=
nt-size: 12pt; font-family: Calibri, sans-serif;"><span lang=3D"EN-US" sty=
le=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">There is cu=
rrently one&nbsp;IPR&nbsp;disclosure.<o:p></o:p></span></p>=0A<p class=3D"=
MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family=
: Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;col=
or:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>=0A<p cla=
ss=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-=
family: Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0=
pt;color:black;mso-fareast-language:EN-GB">In addition, we are polling for=
 knowledge of implementations</span><span lang=3D"EN-US">=0A</span><span l=
ang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-language:E=
N-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:p></o:p></=
span></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font=
-size: 12pt; font-family: Calibri, sans-serif;"><span style=3D"color:black=
;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>=0A<p class=3D"Ms=
oNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span style=3D"color:b=
lack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>=0A<p class=3D"MsoN=
ormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: Ca=
libri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:b=
lack;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>=0A<p cl=
ass=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font=
-family: Calibri, sans-serif;"><span style=3D"font-size:11.0pt;color:black=
;mso-fareast-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-f=
areast-language:EN-GB"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" sty=
le=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: Calibri, san=
s-serif;"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span st=
yle=3D"color:black"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" style=
=3D"orphans: auto; text-align: start; widows: auto; -webkit-text-stroke-wi=
dth: 0px; word-spacing: 0px; margin: 0cm 0cm 0.0001pt; font-size: 12pt; fo=
nt-family: Calibri, sans-serif;">=0A<span lang=3D"EN-US" style=3D"color:bl=
ack">[1]<span class=3D"apple-converted-space">&nbsp;<a href=3D"https://dat=
atracker.ietf.org/doc/draft-ietf-bess-srv6-services/" style=3D"color: rgb(=
5, 99, 193); text-decoration: underline;">https://datatracker.ietf.org/doc=
/draft-ietf-bess-srv6-services/</a></span></span><span class=3D"apple-conv=
erted-space"><span lang=3D"EN-US"><o:p></o:p></span></span></p>=0A<p class=
=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-fa=
mily: Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black">[2]=
<span class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mail=
archive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_bla=
nk" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56=
SEdkjqDpw" style=3D"color: rgb(5, 99, 193); text-decoration: underline;">h=
ttps://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
/span><o:p></o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0cm 0cm 0.=
0001pt; font-size: 12pt; font-family: Calibri, sans-serif;"><span style=3D=
"font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>=0A</div>=0A<div align=3D"c=
enter"><span style=3D"font-size:9.0pt;font-family:Calibri;color:#737373"><=
br>=0A</span></div>=0A</div></div></blockquote>=0A</body></html>
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nbsp;December=202020.</span><span=20style=3D=22color:black;mso-fareast-lang=
uage:EN-GB=22><o:p></o:p></span></p>=0A<p=20class=3D=22MsoNormal=22><span=
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document=20please=20respond=20to=20this=20email=20and=20indicate=20whether=
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R.=20The=20Document=20won't=0A=20progress=20without=20answers=20from=20all=
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l=22><span=20lang=3D=22EN-US=22=20style=3D=22font-size:11.0pt;color:black;m=
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an=20lang=3D=22EN-US=22=20style=3D=22font-size:11.0pt;color:black;mso-farea=
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ce;=22>&nbsp;<a=20href=3D=22https://datatracker.ietf.org/doc/draft-ietf-bes=
s-srv6-services/=22>https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-s=
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space;=22>&nbsp;</span><a=20href=3D=22https://mailarchive.ietf.org/arch/msg=
/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=22=20target=3D=22_blank=22=20title=3D=22h=
ttps://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=22>ht=
tps://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></s=
pan><span=20style=3D=22color:black=22><o:p></o:p></span></p>=0A<p=20class=
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</span></p>=0A</div>=0A=0A=0A</body></html>

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From nobody Mon Dec  7 22:29:05 2020
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Tue, 8 Dec 2020 06:28:51 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Matthew & Stephane,

I support publishing this draft as a standards track RFC.

Best regards,
Jie

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Hi Matthew &amp; Stephane,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I support publishing this draft as a s=
tandards track RFC.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Best regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Jie</span><span lang=3D"EN-US" style=
=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servi=
ces/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"E=
N-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</div>
</body>
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From nobody Tue Dec  8 06:02:34 2020
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From: IETF Meeting Session Request Tool <session-request@ietf.org>
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Subject: [bess] bess - New Meeting Session Request for IETF 110
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A new meeting session request has just been submitted by Matthew Bocci, a Chair of the bess working group.


---------------------------------------------------------
Working Group Name: BGP Enabled ServiceS
Area Name: Routing Area
Session Requester: Matthew Bocci


Number of Sessions: 1
Length of Session(s):  2 Hours
Number of Attendees: 100
Conflicts to Avoid: 
 Chair Conflict: idr nvo3
 Technology Overlap: spring sfc mpls pim bier pals
 Key Participant Conflict: i2rs





People who must be present:
  Matthew Bocci
  Martin Vigoureux
  Stephane Litkowski
  Mankamana Prasad Mishra

Resources Requested:

Special Requests:
  
---------------------------------------------------------



From nobody Tue Dec  8 08:01:25 2020
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From: "Darren Dukes (ddukes)" <ddukes@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Tue, 8 Dec 2020 16:01:01 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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I support publishing the draft as a standards track RFC.

As a contributor, I am not aware of any relevant undisclosed IPR that appli=
es to this document.

Thanks,
Darren Dukes

________________________________
From: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Sent: Monday, November 30, 2020 12:15 PM
To: draft-ietf-bess-srv6-services@ietf.org <draft-ietf-bess-srv6-services@i=
etf.org>; bess@ietf.org <bess@ietf.org>
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05


This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]



Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.



This poll runs until Monday 14th December 2020.



We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).



If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.

There is currently one IPR disclosure.



In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].



Thank you,

Matthew & Stephane





[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/

[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw



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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
I support publishing the draft as a standards track RFC.</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
As a contributor, I am not aware of any relevant undisclosed IPR that appli=
es to this document.</div>
<div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
<br>
</div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Thanks,</div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Darren Dukes</div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
<br>
</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Bocci, Matthew (Nokia=
 - GB) &lt;matthew.bocci@nokia.com&gt;<br>
<b>Sent:</b> Monday, November 30, 2020 12:15 PM<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org &lt;draft-ietf-bess-srv6-=
services@ietf.org&gt;; bess@ietf.org &lt;bess@ietf.org&gt;<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05</font>
<div>&nbsp;</div>
</div>
<div lang=3D"EN-GB" style=3D"word-wrap:break-word">
<div class=3D"x_WordSection1">
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">This email starts a two-week wor=
king group last call for&nbsp;</span><span style=3D"color:black">draft-ietf=
-bess-srv6-services-05 [1]</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">Please review the draft and send=
 any comments to the BESS list. Also, please indicate if you support publis=
hing the draft as a standards track RFC.</span><span style=3D"color:black">=
</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span style=3D"colo=
r:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">This&nbsp;poll&nbsp;runs until M=
onday 14th&nbsp;December 2020.</span><span style=3D"color:black"></span></p=
>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span style=3D"colo=
r:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"color:black">We are also&nbsp;polling for knowledge of any u=
ndisclosed&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp=
;IPR&nbsp;has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (s=
ee RFCs 3979, 4879, 3669 and 5378 for more details).</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"color:black">If you are listed as an Author or a Contributor=
 of this document please respond to this email and indicate whether or not =
you are aware of any relevant undisclosed&nbsp;IPR. The Document won't prog=
ress without answers from all the Authors
 and Contributors.&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt; color:black">There is curre=
ntly one&nbsp;IPR&nbsp;disclosure.</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt; color:black">&nbsp;</span><=
/p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt; color:black">In addition, w=
e are polling for knowledge of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt; color:black">of this=
 draft, per the BESS policy in [2]. &nbsp;&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"color:black">&nbsp;</span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt; color:black">Thank you,</sp=
an><span style=3D"color:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt; color:black">Matthew &amp; =
Stephane</span><span style=3D"color:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:11.0pt; color:black">&nbsp;</span><span style=3D"c=
olor:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span style=3D"colo=
r:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;font-variant-caps:normal; orphans:auto; text-align:st=
art; widows:auto; word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"x_apple-conver=
ted-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bes=
s-srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-ser=
vices/</a></span></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">[2]<span class=3D"x_apple-conver=
ted-space">&nbsp;</span><a href=3D"https://mailarchive.ietf.org/arch/msg/be=
ss/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://mailarch=
ive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span style=
=3D"color:black"></span></p>
<p class=3D"x_MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family=
: Calibri, sans-serif;">
<span style=3D"font-size:11.0pt">&nbsp;</span></p>
</div>
</div>
</div>
</body>
</html>

--_000_BN6PR11MB408165B08C3C11C8BD1737CDC8CD0BN6PR11MB4081namp_--


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Date: Tue, 08 Dec 2020 08:20:36 -0800
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Subject: [bess] Secdir last call review of draft-ietf-bess-evpn-proxy-arp-nd-09
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Reviewer: Russ Housley
Review result: Has Issues

I reviewed this document as part of the Security Directorate's ongoing
effort to review all IETF documents being processed by the IESG.  These
comments were written primarily for the benefit of the Security Area
Directors.  Document authors, document editors, and WG chairs should
treat these comments just like any other IETF Last Call comments.

Document: draft-ietf-bess-evpn-proxy-arp-nd-09
Reviewer: Russ Housley
Review Date: 2020-12-08
IETF LC End Date: 2020-12-15
IESG Telechat date: unknown

Summary: Has Issues


Major Concerns:  I worry about the reference to SEND (RFC 3971).  The
  SEND protocol only supports digital signatures using RSA with SHA-1.
  While this still might be adequate for the time scales associated 
  with ND, the 80-bit security offered by SHA-1 is not considered
  adequate for digital signatures in general.  Is the reference to
  SEND really needed in this document?


Minor Concerns:  None


Nits:  The Gen-ART review by me includes some editorial suggestions.




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From: Linda Dunbar <linda.dunbar@futurewei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Support for the publication.

Linda Dunbar


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Bocci, Matthew (Noki=
a - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-bess-srv6-serv=
ices@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/<https:/=
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[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw<=
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<p class=3D"MsoNormal" style=3D"background:white"><span style=3D"font-size:=
11.0pt;color:black;mso-fareast-language:ZH-CN">Linda Dunbar</span><span sty=
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<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;mso-fareast-langu=
age:ZH-CN">From:</span></b><span style=3D"font-size:11.0pt;mso-fareast-lang=
uage:ZH-CN"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bou=
nces@ietf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This email starts a two-week working group last call for&nbsp;</span><sp=
an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">draft-ie=
tf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">Please review the draft and send any comments to the BESS list. Also, pl=
ease indicate if you support publishing the draft as a standards track RFC.=
</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.</span><sp=
an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">In addition, we are polling for knowledge of implementa=
tions</span>
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">of =
this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" style=3D"color:bl=
ack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Matthew &amp; Stephane</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">[1]<span class=3D"apple-converted-space">&nbsp;=
</span></span><a href=3D"https://nam11.safelinks.protection.outlook.com/?ur=
l=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-bess-srv6-service=
s%2F&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Cd14939408a2541baa3=
1108d898bac2d8%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637427275185677=
834%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1=
haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3DHYo%2BHHhe8bo%2FfkBmNkQ02GDUBKgJMFas=
INFVc%2FdSaTs%3D&amp;reserved=3D0">https://datatracker.ietf.org/doc/draft-i=
etf-bess-srv6-services/</a><span class=3D"apple-converted-space"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">[2]<span class=3D"apple-=
converted-space">&nbsp;</span></span><a href=3D"https://nam11.safelinks.pro=
tection.outlook.com/?url=3Dhttps%3A%2F%2Fmailarchive.ietf.org%2Farch%2Fmsg%=
2Fbess%2FcG3X1tTqb_vPC4rg56SEdkjqDpw&amp;data=3D04%7C01%7Clinda.dunbar%40fu=
turewei.com%7Cd14939408a2541baa31108d898bac2d8%7C0fee8ff2a3b240189c753a1d55=
91fedc%7C1%7C1%7C637427275185687832%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjA=
wMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3D9Ssq=
wNW00sq2hGWJ55nz6N2nGOUvmf4gYM0g8mW6I%2BE%3D&amp;reserved=3D0" target=3D"_b=
lank" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg5=
6SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SE=
dkjqDpw</a><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
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</html>

--_000_SN6PR13MB233453485DF962A451279C9185CD0SN6PR13MB2334namp_--


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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
Thread-Index: AQHWzYJQC3iJUVJXkUCjHQgq17Vp4Q==
Date: Tue, 8 Dec 2020 16:51:03 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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From: "Majumdar, Kausik" <Kausik.Majumdar@commscope.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Tue, 8 Dec 2020 17:47:45 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/ZiZUJqoFxSAeGCiKolSWFsDeDBg>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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I support the publication of this draft as standards track RFC.
Thanks,
Kausik

From: BESS <bess-bounces@ietf.org> On Behalf Of Bocci, Matthew (Nokia - GB)
Sent: Monday, November 30, 2020 9:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1] Please review the draft and send any comments to the BES=
S list. Also, please indicate if you support publi
External (matthew.bocci@nokia.com<mailto:matthew.bocci@nokia.com>)
Report This Email<https://shared.outlook.inky.com/report?id=3DY29tbXNjb3BlL=
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This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/<https:/=
/secure-web.cisco.com/14SrBCDjZct5qVf_DNhjUKYVODVqC1G0zOx9od-H6wbAWsHFnVmr_=
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4ewkSfxxqLSPa0Ebaa5aOIEO5hiFoz6HSC34lu22yW3/https%3A%2F%2Fdatatracker.ietf.=
org%2Fdoc%2Fdraft-ietf-bess-srv6-services%2F>
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw<=
https://secure-web.cisco.com/13Vx0yVM0TwfJP5JObdmoqAxKlFesGSbndT5vWuUoMNY5w=
MAiLN5yH1YVmdqCobmhJ1RBOsywAQKcA0Lc_BhF0ayYe_HIqT3GwwYlYsjInTdJDVz7G8IwfArx=
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HyIEqDCiWoG_JFcoawHRTiD0Hbtluh2Nlvpz5jsrCnecDtCepd/https%3A%2F%2Fmailarchiv=
e.ietf.org%2Farch%2Fmsg%2Fbess%2FcG3X1tTqb_vPC4rg56SEdkjqDpw>


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<p=20class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p=20class=3D"MsoNormal">Kausik<o:p></o:p></p>
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gt;
<b>On=20Behalf=20Of=20</b>Bocci,=20Matthew=20(Nokia=20-=20GB)<br/>
<b>Sent:</b>=20Monday,=20November=2030,=202020=209:16=20AM<br/>
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<p=20class=3D"MsoNormal"><span=20lang=3D"EN-GB"=20style=3D"color:black;mso-=
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levant=20undisclosed&nbsp;IPR.=20The
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<span=20style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">o=
f=20this=20draft,=20per=20the=20BESS=20policy=20in=20[2].=20&nbsp;&nbsp;<o:=
p></o:p></span></p>
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Date: Tue, 8 Dec 2020 20:05:05 +0000
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References: <9F8ADECE-075C-4832-8892-335E27B5E500@cisco.com>
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From nobody Tue Dec  8 15:12:39 2020
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Date: Wed, 9 Dec 2020 07:12:20 +0800 (CST)
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To: draft-ietf-bess-srv6-services <draft-ietf-bess-srv6-services@ietf.org>,  bess <bess@ietf.org>, "matthew.bocci" <matthew.bocci@nokia.com>
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I=C2=A0support=C2=A0publishing=C2=A0the=C2=A0draft=C2=A0as=C2=A0a=C2=A0stan=
dards=C2=A0track=C2=A0RFC.Weiqiang=C2=A0Cheng=09---=E5=8E=9F=E5=A7=8B=E9=82=
=AE=E4=BB=B6--- From: Bocci, Matthew (Nokia - GB) Sent: Monday, November 30=
, 2020 12:15 PMTo: draft-ietf-bess-srv6-services@ietf.org  bess@ietf.org Su=
bject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-s=
ervices-05 =C2=A0This email starts a two-week working group last call for=
=C2=A0draft-ietf-bess-srv6-services-05 [1]=C2=A0Please review the draft and=
 send any comments to the BESS list. Also, please indicate if you support p=
ublishing the draft as a standards track RFC.=C2=A0This=C2=A0poll=C2=A0runs=
 until Monday 14th=C2=A0December 2020.=C2=A0We are also=C2=A0polling for kn=
owledge of any undisclosed=C2=A0IPR=C2=A0that applies to this Document, to =
ensure that=C2=A0IPR=C2=A0has been disclosed in compliance with IETF=C2=A0I=
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f you are listed as an Author or a Contributor of this document please resp=
ond to this email and indicate whether or not you are aware of any relevant=
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sclosure.=C2=A0In addition, we are polling for knowledge of implementations=
 of this draft, per the BESS policy in [2]. =C2=A0=C2=A0=C2=A0Thank you,Mat=
thew & Stephane=C2=A0=C2=A0[1]=C2=A0https://datatracker.ietf.org/doc/draft-=
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<div>I=C2=A0support=C2=A0publishing=C2=A0the=C2=A0draft=C2=A0as=C2=A0a=C2=
=A0standards=C2=A0track=C2=A0RFC.<br&nbsp;/><br&nbsp;/>Weiqiang=C2=A0Cheng<=
br&nbsp;/><br&nbsp;/>=09<br&nbsp;/><br&nbsp;/>---=E5=8E=9F=E5=A7=8B=E9=82=
=AE=E4=BB=B6---&nbsp;<br&nbsp;/><br&nbsp;/>From:&nbsp;Bocci,&nbsp;Matthew&n=
bsp;(Nokia&nbsp;-&nbsp;GB)&nbsp;<matthew.bocci@nokia.com><br&nbsp;/>Sent:&n=
bsp;Monday,&nbsp;November&nbsp;30,&nbsp;2020&nbsp;12:15&nbsp;PM<br&nbsp;/>T=
o:&nbsp;draft-ietf-bess-srv6-services@ietf.org&nbsp;<draft-ietf-bess-srv6-s=
ervices@ietf.org>;&nbsp;bess@ietf.org&nbsp;<bess@ietf.org><br&nbsp;/>Subjec=
t:&nbsp;WG&nbsp;Last&nbsp;Call,&nbsp;IPR&nbsp;and&nbsp;Implementation&nbsp;=
Poll&nbsp;for&nbsp;draft-ietf-bess-srv6-services-05&nbsp;<br&nbsp;/><br&nbs=
p;/>=C2=A0<br&nbsp;/><br&nbsp;/>This&nbsp;email&nbsp;starts&nbsp;a&nbsp;two=
-week&nbsp;working&nbsp;group&nbsp;last&nbsp;call&nbsp;for=C2=A0draft-ietf-=
bess-srv6-services-05&nbsp;[1]<br&nbsp;/><br&nbsp;/>=C2=A0<br&nbsp;/><br&nb=
sp;/>Please&nbsp;review&nbsp;the&nbsp;draft&nbsp;and&nbsp;send&nbsp;any&nbs=
p;comments&nbsp;to&nbsp;the&nbsp;BESS&nbsp;list.&nbsp;Also,&nbsp;please&nbs=
p;indicate&nbsp;if&nbsp;you&nbsp;support&nbsp;publishing&nbsp;the&nbsp;draf=
t&nbsp;as&nbsp;a&nbsp;standards&nbsp;track&nbsp;RFC.<br&nbsp;/><br&nbsp;/>=
=C2=A0<br&nbsp;/><br&nbsp;/>This=C2=A0poll=C2=A0runs&nbsp;until&nbsp;Monday=
&nbsp;14th=C2=A0December&nbsp;2020.<br&nbsp;/><br&nbsp;/>=C2=A0<br&nbsp;/><=
br&nbsp;/>We&nbsp;are&nbsp;also=C2=A0polling&nbsp;for&nbsp;knowledge&nbsp;o=
f&nbsp;any&nbsp;undisclosed=C2=A0IPR=C2=A0that&nbsp;applies&nbsp;to&nbsp;th=
is&nbsp;Document,&nbsp;to&nbsp;ensure&nbsp;that=C2=A0IPR=C2=A0has&nbsp;been=
&nbsp;disclosed&nbsp;in&nbsp;compliance&nbsp;with&nbsp;IETF=C2=A0IPR=C2=A0r=
ules&nbsp;(see&nbsp;RFCs&nbsp;3979,&nbsp;4879,&nbsp;3669&nbsp;and&nbsp;5378=
&nbsp;for&nbsp;more&nbsp;details).<br&nbsp;/><br&nbsp;/>=C2=A0<br&nbsp;/><b=
r&nbsp;/>If&nbsp;you&nbsp;are&nbsp;listed&nbsp;as&nbsp;an&nbsp;Author&nbsp;=
or&nbsp;a&nbsp;Contributor&nbsp;of&nbsp;this&nbsp;document&nbsp;please&nbsp=
;respond&nbsp;to&nbsp;this&nbsp;email&nbsp;and&nbsp;indicate&nbsp;whether&n=
bsp;or&nbsp;not&nbsp;you&nbsp;are&nbsp;aware&nbsp;of&nbsp;any&nbsp;relevant=
&nbsp;undisclosed=C2=A0IPR.&nbsp;The&nbsp;Document&nbsp;won't&nbsp;progress=
&nbsp;without&nbsp;answers&nbsp;from&nbsp;all&nbsp;the&nbsp;Authors&nbsp;an=
d&nbsp;Contributors.=C2=A0<br&nbsp;/><br&nbsp;/>There&nbsp;is&nbsp;currentl=
y&nbsp;one=C2=A0IPR=C2=A0disclosure.<br&nbsp;/><br&nbsp;/>=C2=A0<br&nbsp;/>=
<br&nbsp;/>In&nbsp;addition,&nbsp;we&nbsp;are&nbsp;polling&nbsp;for&nbsp;kn=
owledge&nbsp;of&nbsp;implementations&nbsp;of&nbsp;this&nbsp;draft,&nbsp;per=
&nbsp;the&nbsp;BESS&nbsp;policy&nbsp;in&nbsp;[2].&nbsp;=C2=A0=C2=A0<br&nbsp=
;/><br&nbsp;/>=C2=A0<br&nbsp;/><br&nbsp;/>Thank&nbsp;you,<br&nbsp;/><br&nbs=
p;/>Matthew&nbsp;&&nbsp;Stephane<br&nbsp;/><br&nbsp;/>=C2=A0<br&nbsp;/><br&=
nbsp;/>=C2=A0<br&nbsp;/><br&nbsp;/>[1]=C2=A0https://datatracker.ietf.org/do=
c/draft-ietf-bess-srv6-services/<br&nbsp;/><br&nbsp;/>[2]=C2=A0https://mail=
archive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw<br&nbsp;/><br&nb=
sp;/>=C2=A0<br&nbsp;/><br&nbsp;/></div>
------=_Part_289903_771573036.1607469140277--



From nobody Tue Dec  8 19:13:35 2020
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From: "Aijun Wang" <wangaijun@tsinghua.org.cn>
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi, All:

 

Support its publication.

 

One comments for the document:

Should the name of document be changed to "BGP based SRv6 overlay services"
to reflect its actual scope?

This document discusses just the distribution of SRv6 service label
distribution via BGP.  As also stated in the document, it also applies in
the plain IPv6 forwarding environment.

 

 

Best Regards

 

Aijun Wang

China Telecom

 

 

From: bess-bounces@ietf.org <bess-bounces@ietf.org> On Behalf Of Bocci,
Matthew (Nokia - GB)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for
draft-ietf-bess-srv6-services-05

 

This email starts a two-week working group last call for
draft-ietf-bess-srv6-services-05 [1]

 

Please review the draft and send any comments to the BESS list. Also, please
indicate if you support publishing the draft as a standards track RFC.

 

This poll runs until Monday 14th December 2020.

 

We are also polling for knowledge of any undisclosed IPR that applies to
this Document, to ensure that IPR has been disclosed in compliance with IETF
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

 

If you are listed as an Author or a Contributor of this document please
respond to this email and indicate whether or not you are aware of any
relevant undisclosed IPR. The Document won't progress without answers from
all the Authors and Contributors. 

There is currently one IPR disclosure.

 

In addition, we are polling for knowledge of implementations of this draft,
per the BESS policy in [2].   

 

Thank you,

Matthew & Stephane

 

 

[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/

[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>Hi, All:<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>Support its publication.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>One comments for the document:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>Should the name of document be changed to </span><span =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>&#8220;<span lang=3DEN-US>BGP based SRv6 overlay =
services</span>&#8221;<span lang=3DEN-US> to reflect its actual =
scope?<o:p></o:p></span></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>This document discusses just the distribution of SRv6 =
service label distribution via BGP. &nbsp;As also stated in the =
document, it also applies in the plain IPv6 forwarding =
environment.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D'><o:p>&nbsp;=
</o:p></span></p><p class=3DMsoNormal style=3D'text-align:justify'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>Best Regards<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'text-align:justify'><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'text-align:justify'><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>Aijun Wang<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'text-align:justify'><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'>China Telecom<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><b><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;mso-fareast-language:ZH-CN'>From:</span></b><sp=
an lang=3DEN-US style=3D'font-size:11.0pt;mso-fareast-language:ZH-CN'> =
bess-bounces@ietf.org &lt;bess-bounces@ietf.org&gt; <b>On Behalf Of =
</b>Bocci, Matthew (Nokia - GB)<br><b>Sent:</b> Tuesday, December 1, =
2020 1:16 AM<br><b>To:</b> draft-ietf-bess-srv6-services@ietf.org; =
bess@ietf.org<br><b>Subject:</b> [bess] WG Last Call, IPR and =
Implementation Poll for =
draft-ietf-bess-srv6-services-05<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US style=3D'color:black;mso-fareast-language:EN-GB'>This email =
starts a two-week working group last call for&nbsp;</span><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'>draft-ietf-bess-srv6-ser=
vices-05 [1]<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'>&nbsp;<o:p></o:p></span>=
</p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US style=3D'color:black;mso-fareast-language:EN-GB'>Please =
review the draft and send any comments to the BESS list. Also, please =
indicate if you support publishing the draft as a standards track =
RFC.</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>&nbsp;</span><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>This&nbsp;poll&nbsp;runs=
 until Monday 14th&nbsp;December 2020.</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>&nbsp;</span><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB style=3D'color:black;mso-fareast-language:EN-GB'>We are =
also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;that =
applies to this Document, to ensure that&nbsp;IPR&nbsp;has been =
disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, =
4879, 3669 and 5378 for more details).<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p>&nbsp;</o:p></span>=
</p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB style=3D'color:black;mso-fareast-language:EN-GB'>If you are =
listed as an Author or a Contributor of this document please respond to =
this email and indicate whether or not you are aware of any relevant =
undisclosed&nbsp;IPR. The Document won't progress without answers from =
all the Authors and Contributors.&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>There =
is currently one&nbsp;IPR&nbsp;disclosure.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'><o:p>&n=
bsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>In =
addition, we are polling for knowledge of implementations</span><span =
lang=3DEN-US> </span><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>of =
this draft, per the BESS policy in [2]. =
&nbsp;&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p>&nbsp;</o:p></span>=
</p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>Thank =
you,</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>Matthew=
 &amp; Stephane</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>&nbsp;<=
/span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd;caret-color: =
rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>[1]<span class=3Dapple-converted-space>&nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/">=
https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/</a></span=
></span><span class=3Dapple-converted-space><span =
lang=3DEN-US><o:p></o:p></span></span></p><p class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-US style=3D'color:black'>[2]<span =
class=3Dapple-converted-space>&nbsp;</span><a =
href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdk=
jqDpw" target=3D"_blank" =
title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEd=
kjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdk=
jqDpw</a></span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd'><span =
lang=3DEN-GB =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></p></div></body></htm=
l>
------=_NextPart_000_001D_01D6CE1C.50D39CE0--


From nobody Tue Dec  8 19:53:19 2020
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In-Reply-To: <001c01d6cdd9$42af9990$c80eccb0$@tsinghua.org.cn>
From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Tue, 8 Dec 2020 22:53:05 -0500
Message-ID: <CABNhwV1wHrroHP6a-f91TnPhu75aPAJafcbOE178=c6+eKVpgw@mail.gmail.com>
To: Aijun Wang <wangaijun@tsinghua.org.cn>
Cc: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, bess@ietf.org,  draft-ietf-bess-srv6-services@ietf.org
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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I support publication of this document.

This is an important very well written document, and is one of the only
Spring documents that describes SRv6-BE w/o SRH and SRv6-TE w/ SRH -SR-TE
policy - BGP Prefix SID overlay service route for L2 VPN, L3 VPN label
encoded into func/arg.



Thanks

Gyan

On Tue, Dec 8, 2020 at 10:13 PM Aijun Wang <wangaijun@tsinghua.org.cn>
wrote:

> Hi, All:
>
>
>
> Support its publication.
>
>
>
> One comments for the document:
>
> Should the name of document be changed to =E2=80=9CBGP based SRv6 overlay=
 services
> =E2=80=9D to reflect its actual scope?
>
> This document discusses just the distribution of SRv6 service label
> distribution via BGP.  As also stated in the document, it also applies in
> the plain IPv6 forwarding environment.
>
>
>
>
>
> Best Regards
>
>
>
> Aijun Wang
>
> China Telecom
>
>
>
>
>
> *From:* bess-bounces@ietf.org <bess-bounces@ietf.org> *On Behalf Of *Bocc=
i,
> Matthew (Nokia - GB)
> *Sent:* Tuesday, December 1, 2020 1:16 AM
> *To:* draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
> *Subject:* [bess] WG Last Call, IPR and Implementation Poll for
> draft-ietf-bess-srv6-services-05
>
>
>
> This email starts a two-week working group last call for draft-ietf-bess-=
srv6-services-05
> [1]
>
>
>
> Please review the draft and send any comments to the BESS list. Also,
> please indicate if you support publishing the draft as a standards track
> RFC.
>
>
>
> This poll runs until Monday 14th December 2020.
>
>
>
> We are also polling for knowledge of any undisclosed IPR that applies to
> this Document, to ensure that IPR has been disclosed in compliance with
> IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
>
>
> If you are listed as an Author or a Contributor of this document please
> respond to this email and indicate whether or not you are aware of any
> relevant undisclosed IPR. The Document won't progress without answers fro=
m
> all the Authors and Contributors.
>
> There is currently one IPR disclosure.
>
>
>
> In addition, we are polling for knowledge of implementations of this
> draft, per the BESS policy in [2].
>
>
>
> Thank you,
>
> Matthew & Stephane
>
>
>
>
>
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
>
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDp=
w
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>
--=20

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *



*M 301 502-134713101 Columbia Pike *Silver Spring, MD

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<div><br></div><div dir=3D"auto">I support publication of this document.</d=
iv><div dir=3D"auto"><br></div><div dir=3D"auto">This is an important very =
well written document, and is one of the only Spring documents that describ=
es SRv6-BE w/o SRH and SRv6-TE w/ SRH -SR-TE policy - BGP Prefix SID overla=
y service route for L2 VPN, L3 VPN label encoded into func/arg.</div><div d=
ir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto">Thanks=C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Gyan</div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cl=
ass=3D"gmail_attr">On Tue, Dec 8, 2020 at 10:13 PM Aijun Wang &lt;<a href=
=3D"mailto:wangaijun@tsinghua.org.cn">wangaijun@tsinghua.org.cn</a>&gt; wro=
te:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border=
-left-color:rgb(204,204,204)"><div lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D=
"#954F72"><div class=3D"m_-8934606514545848888WordSection1"><p class=3D"Mso=
Normal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:DengXian=
;color:rgb(31,73,125)">Hi, All:<u style=3D"font-family:DengXian"></u><u sty=
le=3D"font-family:DengXian"></u></span></p><p class=3D"MsoNormal"><span lan=
g=3D"EN-US" style=3D"font-size:10.5pt;font-family:DengXian;color:rgb(31,73,=
125)"><u style=3D"font-family:DengXian"></u>=C2=A0<u style=3D"font-family:D=
engXian"></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=
=3D"font-size:10.5pt;font-family:DengXian;color:rgb(31,73,125)">Support its=
 publication.<u style=3D"font-family:DengXian"></u><u style=3D"font-family:=
DengXian"></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=
=3D"font-size:10.5pt;font-family:DengXian;color:rgb(31,73,125)"><u style=3D=
"font-family:DengXian"></u>=C2=A0<u style=3D"font-family:DengXian"></u></sp=
an></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5p=
t;font-family:DengXian;color:rgb(31,73,125)">One comments for the document:=
<u style=3D"font-family:DengXian"></u><u style=3D"font-family:DengXian"></u=
></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:=
10.5pt;font-family:DengXian;color:rgb(31,73,125)">Should the name of docume=
nt be changed to </span><span style=3D"font-size:10.5pt;font-family:DengXia=
n;color:rgb(31,73,125)">=E2=80=9C<span lang=3D"EN-US" style=3D"font-family:=
DengXian">BGP based SRv6 overlay services</span>=E2=80=9D<span lang=3D"EN-U=
S" style=3D"font-family:DengXian"> to reflect its actual scope?<u style=3D"=
font-family:DengXian"></u><u style=3D"font-family:DengXian"></u></span></sp=
an></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5p=
t;font-family:DengXian;color:rgb(31,73,125)">This document discusses just t=
he distribution of SRv6 service label distribution via BGP.=C2=A0 As also s=
tated in the document, it also applies in the plain IPv6 forwarding environ=
ment.<u style=3D"font-family:DengXian"></u><u style=3D"font-family:DengXian=
"></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-=
size:10.5pt;font-family:DengXian;color:rgb(31,73,125)"><u style=3D"font-fam=
ily:DengXian"></u>=C2=A0<u style=3D"font-family:DengXian"></u></span></p><p=
 class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-fa=
mily:DengXian;color:rgb(31,73,125)"><u style=3D"font-family:DengXian"></u>=
=C2=A0<u style=3D"font-family:DengXian"></u></span></p><p class=3D"MsoNorma=
l" style=3D"text-align:justify"><span lang=3D"EN-US" style=3D"font-size:10.=
5pt;font-family:DengXian;color:rgb(31,73,125)">Best Regards<u style=3D"font=
-family:DengXian"></u><u style=3D"font-family:DengXian"></u></span></p><p c=
lass=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" style=
=3D"font-size:10.5pt;font-family:DengXian;color:rgb(31,73,125)"><u style=3D=
"font-family:DengXian"></u>=C2=A0<u style=3D"font-family:DengXian"></u></sp=
an></p><p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN=
-US" style=3D"font-size:10.5pt;font-family:DengXian;color:rgb(31,73,125)">A=
ijun Wang<u style=3D"font-family:DengXian"></u><u style=3D"font-family:Deng=
Xian"></u></span></p><p class=3D"MsoNormal" style=3D"text-align:justify"><s=
pan lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:DengXian;color:rgb=
(31,73,125)">China Telecom<u style=3D"font-family:DengXian"></u><u style=3D=
"font-family:DengXian"></u></span></p><p class=3D"MsoNormal"><span lang=3D"=
EN-US" style=3D"font-size:10.5pt;font-family:DengXian;color:rgb(31,73,125)"=
><u style=3D"font-family:DengXian"></u>=C2=A0<u style=3D"font-family:DengXi=
an"></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"fon=
t-size:10.5pt;font-family:DengXian;color:rgb(31,73,125)"><u style=3D"font-f=
amily:DengXian"></u>=C2=A0<u style=3D"font-family:DengXian"></u></span></p>=
<div><div style=3D"border-style:solid none none;border-top-width:1pt;paddin=
g:3pt 0cm 0cm;border-top-color:rgb(225,225,225)"><p class=3D"MsoNormal" sty=
le=3D"margin-left:21pt"><b><span lang=3D"EN-US" style=3D"font-size:11pt">Fr=
om:</span></b><span lang=3D"EN-US" style=3D"font-size:11pt"> <a href=3D"mai=
lto:bess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a> &lt;=
<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">bess-bounces@iet=
f.org</a>&gt; <b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br><b>Sent:</=
b> Tuesday, December 1, 2020 1:16 AM<br><b>To:</b> <a href=3D"mailto:draft-=
ietf-bess-srv6-services@ietf.org" target=3D"_blank">draft-ietf-bess-srv6-se=
rvices@ietf.org</a>; <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a><br><b>Subject:</b> [bess] WG Last Call, IPR and Implementati=
on Poll for draft-ietf-bess-srv6-services-05<u></u><u></u></span></p></div>=
</div><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=3D"EN-US=
"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal" style=3D"margin-lef=
t:21pt"><span lang=3D"EN-US" style=3D"color:black">This email starts a two-=
week working group last call for=C2=A0</span><span lang=3D"EN-GB" style=3D"=
color:black">draft-ietf-bess-srv6-services-05 [1]<u></u><u></u></span></p><=
/div></div><div lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72"><div clas=
s=3D"m_-8934606514545848888WordSection1"><p class=3D"MsoNormal" style=3D"ma=
rgin-left:21pt"><span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u>=
</u></span></p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=
=3D"EN-US" style=3D"color:black">Please review the draft and send any comme=
nts to the BESS list. Also, please indicate if you support publishing the d=
raft as a standards track RFC.</span><span lang=3D"EN-GB" style=3D"color:bl=
ack"><u></u><u></u></span></p><p class=3D"MsoNormal" style=3D"margin-left:2=
1pt"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</span><span lang=3D"=
EN-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoNormal=
" style=3D"margin-left:21pt"><span lang=3D"EN-US" style=3D"color:black">Thi=
s=C2=A0poll=C2=A0runs until Monday 14th=C2=A0December 2020.</span><span lan=
g=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoN=
ormal" style=3D"margin-left:21pt"><span lang=3D"EN-US" style=3D"color:black=
">=C2=A0</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></s=
pan></p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=3D"EN-=
GB" style=3D"color:black">We are also=C2=A0polling for knowledge of any und=
isclosed=C2=A0IPR=C2=A0that applies to this Document, to ensure that=C2=A0I=
PR=C2=A0has been disclosed in compliance with IETF=C2=A0IPR=C2=A0rules (see=
 RFCs 3979, 4879, 3669 and 5378 for more details).<u></u><u></u></span></p>=
<p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=3D"EN-GB" styl=
e=3D"color:black"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal" sty=
le=3D"margin-left:21pt"><span lang=3D"EN-GB" style=3D"color:black">If you a=
re listed as an Author or a Contributor of this document please respond to =
this email and indicate whether or not you are aware of any relevant undisc=
losed=C2=A0IPR. The Document won&#39;t progress without answers from all th=
e Authors and Contributors.=C2=A0<u></u><u></u></span></p><p class=3D"MsoNo=
rmal" style=3D"margin-left:21pt"><span lang=3D"EN-US" style=3D"font-size:11=
pt;color:black">There is currently one=C2=A0IPR=C2=A0disclosure.<u></u><u><=
/u></span></p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=
=3D"EN-US" style=3D"font-size:11pt;color:black"><u></u>=C2=A0<u></u></span>=
</p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=3D"EN-US" =
style=3D"font-size:11pt;color:black">In addition, we are polling for knowle=
dge of implementations</span><span lang=3D"EN-US"> </span><span lang=3D"EN-=
US" style=3D"font-size:11pt;color:black">of this draft, per the BESS policy=
 in [2]. =C2=A0=C2=A0<u></u><u></u></span></p><p class=3D"MsoNormal" style=
=3D"margin-left:21pt"><span lang=3D"EN-GB" style=3D"color:black"><u></u>=C2=
=A0<u></u></span></p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><spa=
n lang=3D"EN-US" style=3D"font-size:11pt;color:black">Thank you,</span><spa=
n lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D=
"MsoNormal" style=3D"margin-left:21pt"><span lang=3D"EN-US" style=3D"font-s=
ize:11pt;color:black">Matthew &amp; Stephane</span><span lang=3D"EN-GB" sty=
le=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoNormal" style=3D=
"margin-left:21pt"><span lang=3D"EN-GB" style=3D"font-size:11pt;color:black=
">=C2=A0</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></s=
pan></p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lang=3D"EN-=
US" style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"color:=
black"><u></u><u></u></span></p><p class=3D"MsoNormal" style=3D"margin-left=
:21pt;font-variant-caps:normal;text-align:start;word-spacing:0px"><span lan=
g=3D"EN-US" style=3D"color:black">[1]<span class=3D"m_-8934606514545848888a=
pple-converted-space">=C2=A0<a href=3D"https://datatracker.ietf.org/doc/dra=
ft-ietf-bess-srv6-services/" target=3D"_blank">https://datatracker.ietf.org=
/doc/draft-ietf-bess-srv6-services/</a></span></span><span class=3D"m_-8934=
606514545848888apple-converted-space"><span lang=3D"EN-US"><u></u><u></u></=
span></span></p><p class=3D"MsoNormal" style=3D"margin-left:21pt"><span lan=
g=3D"EN-US" style=3D"color:black">[2]<span class=3D"m_-8934606514545848888a=
pple-converted-space">=C2=A0</span><a href=3D"https://mailarchive.ietf.org/=
arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" title=3D"https://mailarchive.iet=
f.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank">https://=
mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><s=
pan lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal" style=3D=
"margin-left:21pt"><span lang=3D"EN-GB" style=3D"font-size:11pt"><u></u>=C2=
=A0<u></u></span></p></div></div>__________________________________________=
_____<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote></div></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" =
data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><div d=
ir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"l=
tr"><div><p style=3D"color:rgb(34,34,34)"><a href=3D"http://www.verizon.com=
/" style=3D"color:rgb(17,85,204);padding-bottom:1em;display:inline-block" t=
arget=3D"_blank"><img src=3D"http://ss7.vzw.com/is/image/VerizonWireless/vz=
-logo-email" width=3D"81" height=3D"18" style=3D"height:18px;width:81px"></=
a><br></p><p style=3D"font-size:1em;margin:0px;font-family:&quot;Verizon NH=
G DS&quot;,Arial,sans-serif;line-height:13px;color:black"><b>Gyan Mishra</b=
></p><p style=3D"color:rgb(34,34,34);margin:0px;line-height:13px"><font fac=
e=3D"georgia, serif" style=3D"color:black;font-size:1em"><i>Network Solutio=
ns A</i></font><font color=3D"#000000" face=3D"georgia, serif"><i>rchitect=
=C2=A0</i></font></p><p style=3D"font-size:1em;margin:0px;line-height:13px;=
color:black"><i><font face=3D"georgia, serif">M 301 502-1347<br>13101 Colum=
bia Pike=C2=A0<br></font></i>Silver Spring, MD</p></div><div><br></div></di=
v></div></div></div></div></div></div></div>

--000000000000c5610805b5ffffa8--


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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Aijun Wang <wangaijun@tsinghua.org.cn>, "'Bocci, Matthew (Nokia - GB)'" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/8GnngUkH7YJNDuIzJK9aGsluxxI>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi Aijun,

Did you actually mean to say that the title should be "SRv6-based BGP Overl=
ay Services"? If so, I agree.

Thanks,
Ketan

From: BESS <bess-bounces@ietf.org> On Behalf Of Aijun Wang
Sent: 09 December 2020 08:43
To: 'Bocci, Matthew (Nokia - GB)' <matthew.bocci@nokia.com>; draft-ietf-bes=
s-srv6-services@ietf.org; bess@ietf.org
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-iet=
f-bess-srv6-services-05

Hi, All:

Support its publication.

One comments for the document:
Should the name of document be changed to "BGP based SRv6 overlay services"=
 to reflect its actual scope?
This document discusses just the distribution of SRv6 service label distrib=
ution via BGP.  As also stated in the document, it also applies in the plai=
n IPv6 forwarding environment.


Best Regards

Aijun Wang
China Telecom


From: bess-bounces@ietf.org<mailto:bess-bounces@ietf.org> <bess-bounces@iet=
f.org<mailto:bess-bounces@ietf.org>> On Behalf Of Bocci, Matthew (Nokia - G=
B)
Sent: Tuesday, December 1, 2020 1:16 AM
To: draft-ietf-bess-srv6-services@ietf.org<mailto:draft-ietf-bess-srv6-serv=
ices@ietf.org>; bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Aijun,<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Did you actually me=
an to say that the title should be &#8220;SRv6-based BGP Overlay Services&#=
8221;? If so, I agree.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Ketan<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:EN-IN"> BESS &lt;bess-bounces@ietf.org&g=
t;
<b>On Behalf Of </b>Aijun Wang<br>
<b>Sent:</b> 09 December 2020 08:43<br>
<b>To:</b> 'Bocci, Matthew (Nokia - GB)' &lt;matthew.bocci@nokia.com&gt;; d=
raft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] WG Last Call, IPR and Implementation Poll for dr=
aft-ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">Hi, All:<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">Support its publi=
cation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">One comments for =
the document:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">Should the name o=
f document be changed to
</span><span lang=3D"ZH-CN" style=3D"font-size:10.5pt;font-family:DengXian;=
color:#1F497D;mso-fareast-language:ZH-CN">&#8220;</span><span lang=3D"EN-US=
" style=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-=
language:ZH-CN">BGP based SRv6 overlay services</span><span lang=3D"ZH-CN" =
style=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-la=
nguage:ZH-CN">&#8221;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;=
font-family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">
 to reflect its actual scope?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">This document dis=
cusses just the distribution of SRv6 service label distribution via BGP. &n=
bsp;As also stated in the document, it also
 applies in the plain IPv6 forwarding environment.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-lang=
uage:ZH-CN">Best Regards<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-lang=
uage:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-lang=
uage:ZH-CN">Aijun Wang<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-lang=
uage:ZH-CN">China Telecom<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p>=
</span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-=
fareast-language:ZH-CN">
<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a> &lt;<a h=
ref=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-=
ietf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">=
This email starts a two-week working group last call for&nbsp;</span><span =
lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">draft-ietf-=
bess-srv6-services-05
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">=
&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">=
Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the
 draft as a standards track RFC.</span><span lang=3D"EN-GB" style=3D"color:=
black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">=
&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language=
:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">=
This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.</span><span =
lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">=
&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language=
:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">=
We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;tha=
t applies to this Document, to ensure that&nbsp;IPR&nbsp;has been
 disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879=
, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">=
<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">=
If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether
 or not you are aware of any relevant undisclosed&nbsp;IPR. The Document wo=
n't progress without answers from all the Authors and Contributors.&nbsp;<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast=
-language:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast=
-language:EN-GB">In addition, we are polling for knowledge of implementatio=
ns</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">=
<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast=
-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" style=3D"color:black=
;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast=
-language:EN-GB">Matthew &amp; Stephane</span><span lang=3D"EN-GB" style=3D=
"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso=
-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span lang=3D"=
EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-=
align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-servi=
ces/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"E=
N-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-US" style=3D"color:black">[2]<span class=3D"apple-con=
verted-space">&nbsp;</span><a href=3D"https://mailarchive.ietf.org/arch/msg=
/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://maila=
rchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarch=
ive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=
=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.7=
5gd"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></spa=
n></p>
</div>
</body>
</html>

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To: "Ketan Talaulikar (ketant)" <ketant=40cisco.com@dmarc.ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/piizXga3PwiR_685IHIj65BgEkw>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi, Ketan:

I prefer to =E2=80=9CBGP based SRv6 Overlay Service=E2=80=9D. This document d=
efines the SRv6 service SID and its control procedures.
Anyway, I know the contents, just want it more understandable.

Aijun Wang
China Telecom

> On Dec 9, 2020, at 12:25, Ketan Talaulikar (ketant) <ketant=3D40cisco.com@=
dmarc.ietf.org> wrote:
>=20
> =EF=BB=BF
> Hi Aijun,
> =20
> Did you actually mean to say that the title should be =E2=80=9CSRv6-based B=
GP Overlay Services=E2=80=9D? If so, I agree.
> =20
> Thanks,
> Ketan
> =20
> From: BESS <bess-bounces@ietf.org> On Behalf Of Aijun Wang
> Sent: 09 December 2020 08:43
> To: 'Bocci, Matthew (Nokia - GB)' <matthew.bocci@nokia.com>; draft-ietf-be=
ss-srv6-services@ietf.org; bess@ietf.org
> Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ie=
tf-bess-srv6-services-05
> =20
> Hi, All:
> =20
> Support its publication.
> =20
> One comments for the document:
> Should the name of document be changed to =E2=80=9CBGP based SRv6 overlay s=
ervices=E2=80=9D to reflect its actual scope?
> This document discusses just the distribution of SRv6 service label distri=
bution via BGP.  As also stated in the document, it also applies in the plai=
n IPv6 forwarding environment.
> =20
> =20
> Best Regards
> =20
> Aijun Wang
> China Telecom
> =20
> =20
> From: bess-bounces@ietf.org <bess-bounces@ietf.org> On Behalf Of Bocci, Ma=
tthew (Nokia - GB)
> Sent: Tuesday, December 1, 2020 1:16 AM
> To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
> Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-b=
ess-srv6-services-05
> =20
> This email starts a two-week working group last call for draft-ietf-bess-s=
rv6-services-05 [1]
> =20
> Please review the draft and send any comments to the BESS list. Also, plea=
se indicate if you support publishing the draft as a standards track RFC.
> =20
> This poll runs until Monday 14th December 2020.
> =20
> We are also polling for knowledge of any undisclosed IPR that applies to t=
his Document, to ensure that IPR has been disclosed in compliance with IETF I=
PR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
> =20
> If you are listed as an Author or a Contributor of this document please re=
spond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the A=
uthors and Contributors.=20
> There is currently one IPR disclosure.
> =20
> In addition, we are polling for knowledge of implementations of this draft=
, per the BESS policy in [2].  =20
> =20
> Thank you,
> Matthew & Stephane
> =20
> =20
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=

> =20
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Hi, Ketan:<div><br></div><div>I prefer to =E2=
=80=9CBGP based SRv6 Overlay Service=E2=80=9D. This document defines the SRv=
6 service SID and its control procedures.</div><div>Anyway, I know the conte=
nts, just want it more understandable.<br><div><br><div dir=3D"ltr">Aijun Wa=
ng<div>China Telecom</div></div><div dir=3D"ltr"><br><blockquote type=3D"cit=
e">On Dec 9, 2020, at 12:25, Ketan Talaulikar (ketant) &lt;ketant=3D40cisco.=
com@dmarc.ietf.org&gt; wrote:<br><br></blockquote></div><blockquote type=3D"=
cite"><div dir=3D"ltr">=EF=BB=BF

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii">=

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Aijun,<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Did you actually mea=
n to say that the title should be =E2=80=9CSRv6-based BGP Overlay Services=E2=
=80=9D? If so, I agree.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Ketan<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0=
cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso=
-fareast-language:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"font-=
size:11.0pt;mso-fareast-language:EN-IN"> BESS &lt;bess-bounces@ietf.org&gt;
<b>On Behalf Of </b>Aijun Wang<br>
<b>Sent:</b> 09 December 2020 08:43<br>
<b>To:</b> 'Bocci, Matthew (Nokia - GB)' &lt;matthew.bocci@nokia.com&gt;; dr=
aft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] WG Last Call, IPR and Implementation Poll for dra=
ft-ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">Hi, All:<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">Support its publica=
tion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">One comments for th=
e document:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">Should the name of d=
ocument be changed to
</span><span lang=3D"ZH-CN" style=3D"font-size:10.5pt;font-family:DengXian;c=
olor:#1F497D;mso-fareast-language:ZH-CN">=E2=80=9C</span><span lang=3D"EN-US=
" style=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-l=
anguage:ZH-CN">BGP based SRv6 overlay services</span><span lang=3D"ZH-CN" st=
yle=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-langu=
age:ZH-CN">=E2=80=9D</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;fo=
nt-family:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">
 to reflect its actual scope?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN">This document discu=
sses just the distribution of SRv6 service label distribution via BGP. &nbsp=
;As also stated in the document, it also
 applies in the plain IPv6 forwarding environment.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">Best Regards<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-langua=
ge:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">Aijun Wang<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;font-family:DengXian;color:#1F497D;mso-fareast-langua=
ge:ZH-CN">China Telecom<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-f=
amily:DengXian;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></=
span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0=
cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-fareast-language:Z=
H-CN">From:</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;mso-far=
east-language:ZH-CN">
<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a> &lt;<a hr=
ef=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Tuesday, December 1, 2020 1:16 AM<br>
<b>To:</b> <a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.org">draft-i=
etf-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-i=
etf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">Th=
is email starts a two-week working group last call for&nbsp;</span><span lan=
g=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">draft-ietf-bess=
-srv6-services-05
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">&n=
bsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">Pl=
ease review the draft and send any comments to the BESS list. Also, please i=
ndicate if you support publishing the
 draft as a standards track RFC.</span><span lang=3D"EN-GB" style=3D"color:b=
lack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">&n=
bsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN=
-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">Th=
is&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.</span><span lan=
g=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">&n=
bsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN=
-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">We=
 are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;that a=
pplies to this Document, to ensure that&nbsp;IPR&nbsp;has been
 disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879,=
 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o=
:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">If=
 you are listed as an Author or a Contributor of this document please respon=
d to this email and indicate whether
 or not you are aware of any relevant undisclosed&nbsp;IPR. The Document won=
't progress without answers from all the Authors and Contributors.&nbsp;<o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-l=
anguage:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-l=
anguage:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-l=
anguage:EN-GB">In addition, we are polling for knowledge of implementations<=
/span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareas=
t-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o=
:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-l=
anguage:EN-GB">Thank you,</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-l=
anguage:EN-GB">Matthew &amp; Stephane</span><span lang=3D"EN-GB" style=3D"co=
lor:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color:black;mso-fareast-l=
anguage:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fa=
reast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span lang=3D"EN=
-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-al=
ign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-wi=
dth: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converted=
-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-sr=
v6-services/">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services=
/</a></span></span><span class=3D"apple-converted-space"><span lang=3D"EN-US=
"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-US" style=3D"color:black">[2]<span class=3D"apple-conve=
rted-space">&nbsp;</span><a href=3D"https://mailarchive.ietf.org/arch/msg/be=
ss/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://mailarchi=
ve.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">https://mailarchive.i=
etf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN=
-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:21.0pt;mso-para-margin-left:1.75=
gd"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></span>=
</p>
</div>


<span>_______________________________________________</span><br><span>BESS m=
ailing list</span><br><span>BESS@ietf.org</span><br><span>https://www.ietf.o=
rg/mailman/listinfo/bess</span><br></div></blockquote></div></div></body></h=
tml>=

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From: "Pablo Camarillo (pcamaril)" <pcamaril@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Wed, 9 Dec 2020 08:04:32 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hi,

I support the publication of this document as standards track RFC.
As a contributor, I'm not aware of any undisclosed IPR.

As reported by others, Cisco has running code in both IOS-XR and NX-OS. Thi=
s has already been deployed. Additionally, there are opensource implementat=
ions in ExaBGP [1] and GoBGP [2]

Thank you,
Pablo.

[1] https://github.com/Exa-Networks/exabgp
[2] https://osrg.github.io/gobgp/

From: BESS <bess-bounces@ietf.org> On Behalf Of Bocci, Matthew (Nokia - GB)
Sent: lunes, 30 de noviembre de 2020 18:16
To: draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05

This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">I su=
pport the publication of this document as standards track RFC.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">As a=
 contributor, I&#8217;m not aware of any undisclosed IPR.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">As r=
eported by others, Cisco has running code in both IOS-XR and NX-OS. This ha=
s already been deployed. Additionally, there are opensource implementations=
 in ExaBGP [1] and GoBGP [2]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">Than=
k you,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">Pabl=
o.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">[1] =
</span><a href=3D"https://github.com/Exa-Networks/exabgp"><span lang=3D"EN-=
US" style=3D"font-size:11.0pt">https://github.com/Exa-Networks/exabgp</span=
></a><span lang=3D"EN-US" style=3D"font-size:11.0pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">[2] =
</span><a href=3D"https://osrg.github.io/gobgp/"><span lang=3D"EN-US" style=
=3D"font-size:11.0pt">https://osrg.github.io/gobgp/</span></a><span lang=3D=
"EN-US" style=3D"font-size:11.0pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ES">From:</span></b><span lang=3D"EN-US" style=3D"font-s=
ize:11.0pt;mso-fareast-language:ES"> BESS &lt;bess-bounces@ietf.org&gt;
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> lunes, 30 de noviembre de 2020 18:16<br>
<b>To:</b> draft-ietf-bess-srv6-services@ietf.org; bess@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-srv6-services-05<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><a href=3D"https://datatracker.ietf.org/doc/dr=
aft-ietf-bess-srv6-services/"><span lang=3D"EN-US">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</span></a><span class=3D"apple-conv=
erted-space"><span lang=3D"EN-US"><o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><a href=3D"https://mail=
archive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blan=
k" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SE=
dkjqDpw"><span lang=3D"EN-US">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</span></a><span lang=3D"EN-GB"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
</html>

--_000_SA2PR11MB5082ABE13F34E07AE29D3B36C9CC0SA2PR11MB5082namp_--


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Date: Wed, 9 Dec 2020 16:24:56 +0800
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To: matthew.bocci <matthew.bocci@nokia.com>,  draft-ietf-bess-srv6-services <draft-ietf-bess-srv6-services@ietf.org>,  bess <bess@ietf.org>
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<html><head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; margin-bo=
ttom: 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-bottom: 0px; }d=
iv.FoxDiv20201209162340904622 { word-wrap: break-word; }body { font-size: 1=
0.5pt; font-family: ????; color: rgb(0, 0, 0); line-height: 1.5; }</style><=
/head><body>=0A=
<div><span></span>I've read the draft and I&nbsp;<span style=3D"font-family=
: Calibri, sans-serif; font-size: 16px; line-height: normal; background-col=
or: transparent;">support publishing it as a standards track RFC.</span></d=
iv>=0A=
<div><br></div><div>Best Regards,</div><div>Zhenqiang Li</div><hr style=3D"=
width: 210px; height: 1px;" color=3D"#b5c4df" size=3D"1" align=3D"left">=0A=
<div><span><div style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10p=
t"><div>li_zhenqiang@hotmail.com</div></div></span></div>=0A=
<blockquote style=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5e=
m"><div>&nbsp;</div><div style=3D"border:none;border-top:solid #B5C4DF 1.0p=
t;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT=
: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefe=
f; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nbsp;<a href=3D=
"mailto:matthew.bocci@nokia.com" style=3D"color: rgb(5, 99, 193); text-deco=
ration: underline;">Bocci, Matthew (Nokia - GB)</a></div><div><b>Date:</b>&=
nbsp;2020-12-01&nbsp;01:15</div><div><b>To:</b>&nbsp;<a href=3D"mailto:draf=
t-ietf-bess-srv6-services@ietf.org" style=3D"color: rgb(5, 99, 193); text-d=
ecoration: underline;">draft-ietf-bess-srv6-services@ietf.org</a>; <a href=
=3D"mailto:bess@ietf.org" style=3D"color: rgb(5, 99, 193); text-decoration:=
 underline;">bess@ietf.org</a></div><div><b>Subject:</b>&nbsp;[bess] WG Las=
t Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05</d=
iv></div></div><div><div class=3D"FoxDiv20201209162340904622">=0A=
<div class=3D"WordSection1" style=3D"page: WordSection1;">=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">This email starts a two-week working group last call for&n=
bsp;</span><span style=3D"color:black;mso-fareast-language:EN-GB">draft-iet=
f-bess-srv6-services-05 [1]<o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"color:black;mso-fareast-language:EN-GB=
">&nbsp;<o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">Please review the draft and send any comments to the BESS =
list. Also, please indicate if you support publishing the draft as a standa=
rds track RFC.</span><span style=3D"color:black;mso-fareast-language:EN-GB"=
><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-langua=
ge:EN-GB"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2=
020.</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:=
p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-langua=
ge:EN-GB"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"color:black;mso-fareast-language:EN-GB=
">We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;t=
hat applies to this Document, to ensure that&nbsp;IPR&nbsp;has been disclos=
ed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669=
=0A=
 and 5378 for more details).<o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p>&nbsp;</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"color:black;mso-fareast-language:EN-GB=
">If you are listed as an Author or a Contributor of this document please r=
espond to this email and indicate whether or not you are aware of any relev=
ant undisclosed&nbsp;IPR. The Document won't=0A=
 progress without answers from all the Authors and Contributors.&nbsp;<o:p>=
</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;disc=
losure.<o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">In addition, we are polling for knowledge=
 of implementations</span><span lang=3D"EN-US">=0A=
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p>&nbsp;</o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">Thank you,</span><span style=3D"color:bla=
ck;mso-fareast-language:EN-GB"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-lang=
uage:EN-GB"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"orphans: auto; text-align: start; widows: a=
uto; -webkit-text-stroke-width: 0px; word-spacing: 0px; margin: 0cm; font-s=
ize: 12pt; font-family: Calibri, sans-serif;">=0A=
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/" style=3D"color: rgb(5, 99, 193); text-decoration: underline=
;">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/</a><o:p>=
</o:p></span></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span lang=3D"EN-US" style=3D"color:black">[2]<span c=
lass=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive.=
ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=
=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw"=
 style=3D"color: rgb(5, 99, 193); text-decoration: underline;">https://mail=
archive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span =
style=3D"color:black"><o:p></o:p></span></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>=0A=
</div>=0A=
</div></div></blockquote>=0A=
</body></html>=

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From: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
To: "bess@ietf.org" <bess@ietf.org>
CC: "draft-mohanty-bess-weighted-hrw@ietf.org" <draft-mohanty-bess-weighted-hrw@ietf.org>
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Subject: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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--_000_VI1PR0701MB69915532D186BAE3D24AAF72EBCE0VI1PR0701MB6991_
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Hello,

This email begins a two-week WG adoption poll for draft-mohanty-bess-weight=
ed-hrw-01 [1].

Please review the draft and post any comments to the BESS working group lis=
t.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.

Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.

This poll for adoption closes on 23rd December 2020.

Regards,
Matthew and Stephane

[1]  https://datatracker.ietf.org/doc/draft-mohanty-bess-weighted-hrw/




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t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
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<span style=3D"color:black">This email begins a two-week WG&nbsp;adoption&n=
bsp;poll<span class=3D"apple-converted-space">&nbsp;</span>for<span class=
=3D"apple-converted-space">&nbsp;</span>draft-mohanty-bess-weighted-hrw-01<=
/span><span class=3D"apple-converted-space"><span lang=3D"FR" style=3D"colo=
r:black">&nbsp;</span></span><span style=3D"color:black">[1].<b><o:p></o:p>=
</b></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">Please review the draft and post any comments t=
o the BESS working group list.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">We are also&nbsp;polling for knowledge of any u=
ndisclosed IPR that applies to this document, to ensure that IPR has been d=
isclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5=
378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">If you are listed as an author or a contributor=
 of this document, please respond to this email and indicate whether or not=
 you are aware of any relevant undisclosed IPR, copying the BESS mailing li=
st. The document will not &nbsp;progress
 without answers from all of the authors and contributors.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">Currently, there are no IPR disclosures against=
 this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">If you are not listed as an author or a contrib=
utor, then please explicitly respond only if you are aware of any IPR that =
has not yet been disclosed in conformance with IETF rules.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">This<span class=3D"apple-converted-space">&nbsp=
;</span>poll<span class=3D"apple-converted-space">&nbsp;</span>for&nbsp;ado=
ption&nbsp;closes on 23<sup>rd</sup> December 2020.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">Matthew and Stephane<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style=3D"color:black">[1]&nbsp;<span class=3D"apple-converted-space">=
&nbsp;</span><a href=3D"https://datatracker.ietf.org/doc/draft-mohanty-bess=
-weighted-hrw/">https://datatracker.ietf.org/doc/draft-mohanty-bess-weighte=
d-hrw/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
</div>
</body>
</html>

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From: "Bernier, Daniel" <daniel.bernier@bell.ca>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Date: Wed, 9 Dec 2020 13:57:06 +0000
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From: Shyam Sethuram <shyam.ioml@gmail.com>
Date: Wed, 9 Dec 2020 06:28:14 -0800
Message-ID: <CAEGVVtBvCD-hZc1Ywr+DoyAO875hEsDVPBST--_upEjGteqz8w@mail.gmail.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
Cc: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/775y5KOm3gNeMEBRvRY-lv82WJs>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hello,
I support publishing the draft as a standards track RFC.
I'm not aware of any undisclosed IPR.

Thanks,
Shyam Sethuram

On Mon, Nov 30, 2020 at 9:15 AM Bocci, Matthew (Nokia - GB) <
matthew.bocci@nokia.com> wrote:

> This email starts a two-week working group last call for draft-ietf-bess-srv6-services-05
> [1]
>
>
>
> Please review the draft and send any comments to the BESS list. Also,
> please indicate if you support publishing the draft as a standards track
> RFC.
>
>
>
> This poll runs until Monday 14th December 2020.
>
>
>
> We are also polling for knowledge of any undisclosed IPR that applies to
> this Document, to ensure that IPR has been disclosed in compliance with
> IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
>
>
> If you are listed as an Author or a Contributor of this document please
> respond to this email and indicate whether or not you are aware of any
> relevant undisclosed IPR. The Document won't progress without answers from
> all the Authors and Contributors.
>
> There is currently one IPR disclosure.
>
>
>
> In addition, we are polling for knowledge of implementations of this
> draft, per the BESS policy in [2].
>
>
>
> Thank you,
>
> Matthew & Stephane
>
>
>
>
>
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
>
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--00000000000091490605b608dfec
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hello,<div>I support publishing the draft as a standards t=
rack RFC.<br><div>I&#39;m not aware of any undisclosed IPR.</div></div><div=
><br></div><div>Thanks,</div><div>Shyam Sethuram</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Nov 30, 2020=
 at 9:15 AM Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci=
@nokia.com">matthew.bocci@nokia.com</a>&gt; wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-GB" style=3D"overflow-wrap: break-word;">
<div class=3D"gmail-m_-7496648123102866691WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">This emai=
l starts a two-week working group last call for=C2=A0</span><span style=3D"=
color:black">draft-ietf-bess-srv6-services-05 [1]<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">Please re=
view the draft and send any comments to the BESS list. Also, please indicat=
e if you support publishing the draft as a standards track RFC.</span><span=
 style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">This=C2=
=A0poll=C2=A0runs until Monday 14th=C2=A0December 2020.</span><span style=
=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">We are also=C2=A0polling=
 for knowledge of any undisclosed=C2=A0IPR=C2=A0that applies to this Docume=
nt, to ensure that=C2=A0IPR=C2=A0has been disclosed in compliance with IETF=
=C2=A0IPR=C2=A0rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><u></u>=C2=A0<u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:black">If you are listed as an =
Author or a Contributor of this document please respond to this email and i=
ndicate whether or not you are aware of any relevant undisclosed=C2=A0IPR. =
The Document won&#39;t
 progress without answers from all the Authors and Contributors.=C2=A0<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">There is currently one=C2=A0IPR=C2=A0disclosure.<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">In addition, we are polling for knowledge of implementations</span><s=
pan lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11pt;color:black">of this dr=
aft, per the BESS policy in [2]. =C2=A0=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><u></u>=C2=A0<u></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">Thank you,</span><span style=3D"color:black"><u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:b=
lack">Matthew &amp; Stephane</span><span style=3D"color:black"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</s=
pan><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps:normal;text-align:start;w=
ord-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"gmail-m_-74966=
48123102866691apple-converted-space">=C2=A0<a href=3D"https://datatracker.i=
etf.org/doc/draft-ietf-bess-srv6-services/" target=3D"_blank">https://datat=
racker.ietf.org/doc/draft-ietf-bess-srv6-services/</a><u></u><u></u></span>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"gmail-m_-7496648123102866691apple-converted-space">=C2=A0</span><a=
 href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkj=
qDpw" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg5=
6SEdkjqDpw" target=3D"_blank">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span style=3D"color:black"><u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
</div>

_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote></div>

--00000000000091490605b608dfec--


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
CC: "draft-mohanty-bess-weighted-hrw@ietf.org" <draft-mohanty-bess-weighted-hrw@ietf.org>
Thread-Topic: WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/GOcqKooXk0-TvOd9iCnyu2zFoRE>
Subject: Re: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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Support.

Regards,
Jakob.

From: BESS <bess-bounces@ietf.org> On Behalf Of Bocci, Matthew (Nokia - GB)
Sent: Wednesday, December 9, 2020 1:23 AM
To: bess@ietf.org
Cc: draft-mohanty-bess-weighted-hrw@ietf.org
Subject: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hr=
w-01

Hello,

This email begins a two-week WG adoption poll for draft-mohanty-bess-weight=
ed-hrw-01 [1].

Please review the draft and post any comments to the BESS working group lis=
t.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.

Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.

This poll for adoption closes on 23rd December 2020.

Regards,
Matthew and Stephane

[1]  https://datatracker.ietf.org/doc/draft-mohanty-bess-weighted-hrw/




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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#441D61;mso-fareast-language:ZH=
-CN">Support.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#441D61;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#441D61;mso-fareast-language:ZH=
-CN">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#441D61;mso-fareast-language:ZH=
-CN">Jakob.<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#441D61;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;mso-fareast-langu=
age:ZH-CN">From:</span></b><span style=3D"font-size:11.0pt;mso-fareast-lang=
uage:ZH-CN"> BESS &lt;bess-bounces@ietf.org&gt;
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Wednesday, December 9, 2020 1:23 AM<br>
<b>To:</b> bess@ietf.org<br>
<b>Cc:</b> draft-mohanty-bess-weighted-hrw@ietf.org<br>
<b>Subject:</b> [bess] WG adoption and IPR poll for draft-mohanty-bess-weig=
hted-hrw-01<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">Hello,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">This email begins a two-week WG&=
nbsp;adoption&nbsp;poll<span class=3D"apple-converted-space">&nbsp;</span>f=
or<span class=3D"apple-converted-space">&nbsp;</span>draft-mohanty-bess-wei=
ghted-hrw-01</span><span class=3D"apple-converted-space"><span lang=3D"FR" =
style=3D"color:black">&nbsp;</span></span><span lang=3D"EN-GB" style=3D"col=
or:black">[1].<b><o:p></o:p></b></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Please review the draft and post=
 any comments to the BESS working group list.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">We are also&nbsp;polling for kno=
wledge of any undisclosed IPR that applies to this document, to ensure that=
 IPR has been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4=
879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">If you are listed as an author o=
r a contributor of this document, please respond to this email and indicate=
 whether or not you are aware of any relevant undisclosed IPR, copying the =
BESS mailing list. The document will
 not &nbsp;progress without answers from all of the authors and contributor=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Currently, there are no IPR disc=
losures against this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">If you are not listed as an auth=
or or a contributor, then please explicitly respond only if you are aware o=
f any IPR that has not yet been disclosed in conformance with IETF rules.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">This<span class=3D"apple-convert=
ed-space">&nbsp;</span>poll<span class=3D"apple-converted-space">&nbsp;</sp=
an>for&nbsp;adoption&nbsp;closes on 23<sup>rd</sup> December 2020.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Matthew and Stephane<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">[1]&nbsp;<span class=3D"apple-co=
nverted-space">&nbsp;</span><a href=3D"https://datatracker.ietf.org/doc/dra=
ft-mohanty-bess-weighted-hrw/">https://datatracker.ietf.org/doc/draft-mohan=
ty-bess-weighted-hrw/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
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From: John E Drake <jdrake@juniper.net>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
CC: "draft-mohanty-bess-weighted-hrw@ietf.org" <draft-mohanty-bess-weighted-hrw@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/UiNcn4UEmEZasr4dc1nh-JutHqI>
Subject: Re: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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Support and I'm not aware of any IPR

Yours Irrespectively,

John

From: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Sent: Wednesday, December 9, 2020 4:23 AM
To: bess@ietf.org
Cc: draft-mohanty-bess-weighted-hrw@ietf.org
Subject: WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01

[External Email. Be cautious of content]

Hello,

This email begins a two-week WG adoption poll for draft-mohanty-bess-weight=
ed-hrw-01 [1].

Please review the draft and post any comments to the BESS working group lis=
t.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an author or a contributor of this document, please re=
spond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  p=
rogress without answers from all of the authors and contributors.

Currently, there are no IPR disclosures against this document.

If you are not listed as an author or a contributor, then please explicitly=
 respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.

This poll for adoption closes on 23rd December 2020.

Regards,
Matthew and Stephane

[1]  https://datatracker.ietf.org/doc/draft-mohanty-bess-weighted-hrw/<http=
s://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-mohanty-bess-=
weighted-hrw/__;!!NEt6yMaO-gk!Vf6Ix0C0OSKn7tXHMqBdwZLm-ivm_C1kPNh-OzIyoQOWL=
GiCo3D3s9sigA7vQoI$>




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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Support and I&#8217=
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<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Yours Irrespectivel=
y,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">John<o:p></o:p></sp=
an></p>
</div>
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<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt">From:</span></b>=
<span style=3D"font-size:11.0pt"> Bocci, Matthew (Nokia - GB) &lt;matthew.b=
occi@nokia.com&gt;
<br>
<b>Sent:</b> Wednesday, December 9, 2020 4:23 AM<br>
<b>To:</b> bess@ietf.org<br>
<b>Cc:</b> draft-mohanty-bess-weighted-hrw@ietf.org<br>
<b>Subject:</b> WG adoption and IPR poll for draft-mohanty-bess-weighted-hr=
w-01<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"line-height:12.0pt;background:#FFEB9C"><b><=
span lang=3D"EN-GB" style=3D"font-size:10.5pt;font-family:&quot;Lato&quot;,=
sans-serif;color:black">[External Email. Be cautious of content]<o:p></o:p>=
</span></b></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
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<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">Hello,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
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<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
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ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">This email begins a two-week WG&=
nbsp;adoption&nbsp;poll<span class=3D"apple-converted-space">&nbsp;</span>f=
or<span class=3D"apple-converted-space">&nbsp;</span>draft-mohanty-bess-wei=
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<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Please review the draft and post=
 any comments to the BESS working group list.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">We are also&nbsp;polling for kno=
wledge of any undisclosed IPR that applies to this document, to ensure that=
 IPR has been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4=
879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">If you are listed as an author o=
r a contributor of this document, please respond to this email and indicate=
 whether or not you are aware of any relevant undisclosed IPR, copying the =
BESS mailing list. The document will
 not &nbsp;progress without answers from all of the authors and contributor=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Currently, there are no IPR disc=
losures against this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">If you are not listed as an auth=
or or a contributor, then please explicitly respond only if you are aware o=
f any IPR that has not yet been disclosed in conformance with IETF rules.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">This<span class=3D"apple-convert=
ed-space">&nbsp;</span>poll<span class=3D"apple-converted-space">&nbsp;</sp=
an>for&nbsp;adoption&nbsp;closes on 23<sup>rd</sup> December 2020.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Matthew and Stephane<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;tex=
t-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stro=
ke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">[1]&nbsp;<span class=3D"apple-co=
nverted-space">&nbsp;</span><a href=3D"https://urldefense.com/v3/__https:/d=
atatracker.ietf.org/doc/draft-mohanty-bess-weighted-hrw/__;!!NEt6yMaO-gk!Vf=
6Ix0C0OSKn7tXHMqBdwZLm-ivm_C1kPNh-OzIyoQOWLGiCo3D3s9sigA7vQoI$">https://dat=
atracker.ietf.org/doc/draft-mohanty-bess-weighted-hrw/</a><o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</div>
</div>
</body>
</html>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
CC: "draft-mohanty-bess-weighted-hrw@ietf.org" <draft-mohanty-bess-weighted-hrw@ietf.org>
Thread-Topic: WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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Date: Wed, 9 Dec 2020 19:41:53 +0000
Message-ID: <C31730F7-026E-4373-B51A-4284BE315F44@cisco.com>
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Subject: Re: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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From: "Mankamana Mishra (mankamis)" <mankamis@cisco.com>
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Date: Wed, 9 Dec 2020 18:46:59 -0800
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: "=?utf-8?Q?bess=40ietf.org?=" <bess@ietf.org>,  "=?utf-8?Q?Bocci=2C_Matthew_(Nokia_-_GB)?=" <matthew.bocci@nokia.com>
Cc: "=?utf-8?Q?draft-mohanty-bess-weighted-hrw=40ietf.org?=" <draft-mohanty-bess-weighted-hrw@ietf.org>
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Subject: Re: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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yes/suport

Cheers,
Jeff
On Dec 9, 2020, 1:22 AM -0800, Bocci, Matthew (Nokia - GB) <matthew.bocci=
=40nokia.com>, wrote:
> Hello,
>
> This email begins a two-week WG=C2=A0adoption=C2=A0poll=C2=A0for=C2=A0d=
raft-mohanty-bess-weighted-hrw-01=C2=A0=5B1=5D.
>
> Please review the draft and post any comments to the BESS working group=
 list.
>
> We are also=C2=A0polling for knowledge of any undisclosed IPR that appl=
ies to this document, to ensure that IPR has been disclosed in compliance=
 with IET=46 IPR rules (see R=46Cs 3979, 4879, 3669 and 5378 for more det=
ails).
>
> If you are listed as an author or a contributor of this document, pleas=
e respond to this email and indicate whether or not you are aware of any =
relevant undisclosed IPR, copying the BESS mailing list. The document wil=
l not =C2=A0progress without answers from all of the authors and contribu=
tors.
>
> Currently, there are no IPR disclosures against this document.
>
> If you are not listed as an author or a contributor, then please explic=
itly respond only if you are aware of any IPR that has not yet been discl=
osed in conformance with IET=46 rules.
>
> This=C2=A0poll=C2=A0for=C2=A0adoption=C2=A0closes on 23rd December 2020=
.
>
> Regards,
> Matthew and Stephane
>
> =5B1=5D=C2=A0=C2=A0https://datatracker.ietf.org/doc/draft-mohanty-bess-=
weighted-hrw/
>
>
>
> =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
> BESS mailing list
> BESS=40ietf.org
> https://www.ietf.org/mailman/listinfo/bess

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<div name=3D=22messageBodySection=22>
<div dir=3D=22auto=22>yes/suport</div>
</div>
<div name=3D=22messageSignatureSection=22><br />
<div class=3D=22match=46ont=22>Cheers,
<div>Jeff</div>
</div>
</div>
<div name=3D=22messageReplySection=22>On Dec 9, 2020, 1:22 AM -0800, Bocc=
i, Matthew (Nokia - GB) &lt;matthew.bocci=40nokia.com&gt;, wrote:<br />
<blockquote type=3D=22cite=22 style=3D=22border-left-color: grey; border-=
left-width: thin; border-left-style: solid; margin: 5px 5px;padding-left:=
 10px;=22>
<div class=3D=22WordSection1=22>
<p class=3D=22MsoNormal=22><span style=3D=22color:black=22>Hello,</span><=
/p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>This email begins a two-week WG&=23160;adopt=
ion&=23160;poll<span class=3D=22apple-converted-space=22>&=23160;</span>f=
or<span class=3D=22apple-converted-space=22>&=23160;</span>draft-mohanty-=
bess-weighted-hrw-01</span><span class=3D=22apple-converted-space=22><spa=
n lang=3D=22=46R=22 style=3D=22color:black=22 xml:lang=3D=22=46R=22>&=231=
60;</span></span><span style=3D=22color:black=22>=5B1=5D.<b></b></span></=
p>
<p class=3D=22MsoNormal=22><span style=3D=22color:black=22>&=23160;</span=
></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>Please review the draft and post any comment=
s to the BESS working group list.</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>We are also&=23160;polling for knowledge of =
any undisclosed IPR that applies to this document, to ensure that IPR has=
 been disclosed in compliance with IET=46 IPR rules (see R=46Cs 3979, 487=
9, 3669 and 5378 for more details).</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>If you are listed as an author or a contribu=
tor of this document, please respond to this email and indicate whether o=
r not you are aware of any relevant undisclosed IPR, copying the BESS mai=
ling list. The document will not &=23160;progress without answers from al=
l of the authors and contributors.</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>Currently, there are no IPR disclosures agai=
nst this document.</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>If you are not listed as an author or a cont=
ributor, then please explicitly respond only if you are aware of any IPR =
that has not yet been disclosed in conformance with IET=46 rules.</span><=
/p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>This<span class=3D=22apple-converted-space=22=
>&=23160;</span>poll<span class=3D=22apple-converted-space=22>&=23160;</s=
pan>for&=23160;adoption&=23160;closes on 23<sup>rd</sup> December 2020.</=
span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>Regards,</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>Matthew and Stephane</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>&=23160;</span></p>
<p class=3D=22MsoNormal=22 style=3D=22font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit=
-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px=22><sp=
an style=3D=22color:black=22>=5B1=5D&=23160;<span class=3D=22apple-conver=
ted-space=22>&=23160;</span><a href=3D=22https://datatracker.ietf.org/doc=
/draft-mohanty-bess-weighted-hrw/=22>https://datatracker.ietf.org/doc/dra=
ft-mohanty-bess-weighted-hrw/</a></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22color:black=22>&=23160;</span=
></p>
<p class=3D=22MsoNormal=22><span style=3D=22color:black=22>&=23160;</span=
></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:11.0pt=22>&=23160;<=
/span></p>
</div>
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F<br />
BESS mailing list<br />
BESS=40ietf.org<br />
https://www.ietf.org/mailman/listinfo/bess<br /></blockquote>
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Subject: Re: [bess] Erik Kline's Discuss on draft-ietf-bess-evpn-inter-subnet-forwarding-09: (with DISCUSS and COMMENT)
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Ali,

Thanks for your replies.

On Sun, Oct 11, 2020 at 9:06 PM Ali Sajassi (sajassi) <sajassi@cisco.com> w=
rote:
>
> Hi Erik,
>
> Thanks for your comments and sorry to missed them in first place, please =
see my replies in line marked w/ [AS]:
>
> =EF=BB=BFOn 7/14/20, 11:22 PM, "Erik Kline via Datatracker" <noreply@ietf=
.org> wrote:
>
>     Erik Kline has entered the following ballot position for
>     draft-ietf-bess-evpn-inter-subnet-forwarding-09: Discuss
>
>
>     ---------------------------------------------------------------------=
-
>     DISCUSS:
>     ---------------------------------------------------------------------=
-
>
>     [ general ]
>
>     * Can you give an example of what happens to non-IPv4/IPv6 Ethernet p=
ackets
>       received at the NVE/PE?  Do they get bridged, and if so how far?  W=
hat
>       happens if a host in BT1 ARPs for IPv4 address associated with a TS=
 in
>       a different BT?
>
> [AS] L2 packet (non-ARP/ND packet) gets bridged; however, ARP/ND packets =
from the host for its IP default GW gets terminated at the PE and process b=
y it. Section 4.1 describes this in details and it provides an example of i=
t at the bottom of the section. Since the PE acts as the IP default GW for =
the host, all packets to other TSes in other subnets gets forwarded to the =
PE (to its IP default GW).
>
>     * Where there are multiple prefixes in an IP-VRF, is there a constrai=
nt that
>       any other IP-VRF that contains one of the prefixes must contain all=
 of them?
>       Perhaps that's in 7432...?
>
> [AS] IP and MAC addresses for a given host is advertised with its corresp=
onding Route Targets as described at the bottom of section 3, and in sectio=
ns 5.2, 6.2 9.1.1, and 9.2.1. Any PE that has an IP-VRF for that tenant/hos=
t, imports the IP route into its VRF upon receiving it.
>
>     [ sections 4, 5.4, 5.4, 6.3, 6.4, 9.1.2, 9.2.2 ]
>
>     * Please document what happens to IPv4 TTL/IPv6 Hop Limit values as t=
hey
>       cross various NVEs/PEs.
>
> [AS] Added the following to section 4:
> "It should be noted that whenever a PE performs a host IP lookup for a pa=
cket,
>    IPv4 TTL or IPv6 hop limit for that packet is decremented by one and i=
f it
>    reaches zero, the packet is discarded. In case of symmetric IRB, the T=
TL/hop
>    limit is decremented by both ingress and egress PEs (once by each); wh=
ereas,
>    in case of asymmetric IRB, the TTL/hop limit is decremented only once =
by the
>    ingress PE."

I don't quite understand what this text should be telling me.  IPv6
Neighbor Solicitations must be sent with a Hop Limit of 255 (4861
S4.3) and "HL=3D=3D255" is a validation check performed on receipt (4861
S7.1.1).  The same goes for the Neighbor Advertisement replies.

I think your answers above clarifying the mixed routing and bridging
situation (depending on configuration) probably address my original
concern (that NS/NA HLs would not get decremented since they're
bridged; when they're routed they obviously can't be forwarded).  If
that's true, it might be better to undo this particular paragraph
addition, and I apologize for my confusion.

> [AS] I also added similar sentences to sections 5.4, 5.5, 6.3, and 9.1.2,=
 and 9.2.2. This addition is not applicable to section 6.4.
>
>     [ section 7 ]
>
>     * The two statements:
>
>       (1) "Although the language used in this section is for IPv4 ARP,
>           it equally applies to IPv6 ND."
>
>       (2) "If there is [a] many-to-one relationship such that there are m=
any host
>           IP addresses correspond[ing] to a single host MAC address ..., =
then to
>           detect host mobility, the procedures in [IRB-EXT-MOBILITY] must=
 be
>           exercised..."
>
>       are in direct conflict.  All IPv6 hosts having at least one non-lin=
k-local
>       unicast address will have more than one IP address per MAC and this=
 section,
>       or even this document, would not apply?
>
> [AS] I modified the paragraph to call out non-link-local address for IPv6=
 explicitly:
>
> =E2=80=9CIf there is many-to-one relationship such that there are many ho=
st IP
>    addresses (non-link-local unicast addresses for IPv6)
>    corresponding to a single host MAC address or there are many host MAC =
addresses
>    corresponding to a single IP address (non-link-local unicast address f=
or IPv6),
>    then to detect host mobility, the procedures in
>    <xref target=3D"I-D.ietf-bess-evpn-irb-extended-mobility"/>
>    must be exercised followed by the procedures described below.=E2=80=9D

It's not clear to me that IPv6 link-local addresses need to be called
out explicitly.  I simply meant that for IPv6 nodes would likely have
at least two addresses (one LL, one GUA).

Thanks for the reference to the extended mobility doc.


From nobody Thu Dec 10 00:38:28 2020
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Date: Thu, 10 Dec 2020 09:38:16 +0100 (CET)
From: =?utf-8?Q?S=C3=A9bastien?= Parisot <sparisot@free-mobile.fr>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
Cc: draft-ietf-bess-srv6-services@ietf.org, bess@ietf.org
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Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/7i4ehMQrHy0qz0F5EW0Iymnd7aY>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hello,

I support the publication of draft-ietf-bess-srv6-services-05.

We have deployed BGP based L3 service over SRv6 based on this solution, bot=
h with Cisco routers and our own implementation, as described in https://da=
tatracker.ietf.org/doc/draft-matsushima-spring-srv6-deployment-status/ (sec=
tion 2.3. Iliad).

Thanks,
S=C3=A9bastien


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To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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<style>body { line-height: 1.5; }blockquote { margin-top: 0px; margin-botto=
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<div><font face=3D"Calibri, sans-serif"><span style=3D"font-size: 16px;">Hi=
, all</span></font></div>
<div><font face=3D"Calibri, sans-serif"><span style=3D"font-size: 16px;"><b=
r>
</span></font></div>
<div><font face=3D"Calibri, sans-serif"><span style=3D"font-size: 16px;">I =
support publishing the draft as a standards track RFC.</span></font></div>
<div><font face=3D"Calibri, sans-serif"><span style=3D"font-size: 16px;"><b=
r>
</span></font></div>
<div>
<div>
<div style=3D"position: static !important; font-variant-ligatures: normal; =
orphans: 2; white-space: pre-wrap; widows: 2;">
<span style=3D"font-variant-ligatures: normal; line-height: normal;"><span =
style=3D"white-space: normal; widows: 1; font-size: 16px;"><font face=3D"Ca=
libri, sans-serif">Best regards,</font></span></span></div>
</div>
<div style=3D"font-variant-ligatures: normal; orphans: 2;"><span style=3D"l=
ine-height: normal; font-size: 16px;"><font face=3D"Calibri, sans-serif">Pa=
ng Ran</font></span></div>
</div>
<blockquote style=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5e=
m; margin-Right: inherit">
<div>&nbsp;</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-F=
AMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDI=
NG-TOP: 8px">
<div><b>From:</b>&nbsp;<a href=3D"mailto:matthew.bocci@nokia.com" style=3D"=
color: rgb(5, 99, 193); text-decoration: underline;">Bocci, Matthew (Nokia =
- GB)</a></div>
<div><b>Date:</b>&nbsp;2020-12-01&nbsp;01:15</div>
<div><b>To:</b>&nbsp;<a href=3D"mailto:draft-ietf-bess-srv6-services@ietf.o=
rg" style=3D"color: rgb(5, 99, 193); text-decoration: underline;">draft-iet=
f-bess-srv6-services@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org" style=3D"color: rgb(5, 99, 193); text-deco=
ration: underline;">
bess@ietf.org</a></div>
<div><b>Subject:</b>&nbsp;WG Last Call, IPR and Implementation Poll for dra=
ft-ietf-bess-srv6-services-05</div>
</div>
</div>
<div>
<div class=3D"FoxDiv20201210192946822849">
<div class=3D"WordSection1" style=3D"page: WordSection1;">
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">This =
email starts a two-week working group last call for&nbsp;</span><span style=
=3D"color:black;mso-fareast-language:EN-GB">draft-ietf-bess-srv6-services-0=
5 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"color:black;mso-fareast-language:EN-GB">&nbsp;<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">Pleas=
e review the draft and send any comments to the BESS list. Also, please ind=
icate if you support publishing the draft as a standards track RFC.</span><=
span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">&nbsp=
;</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">This&=
nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 2020.</span><span style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black;mso-fareast-language:EN-GB">&nbsp=
;</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"color:black;mso-fareast-language:EN-GB">We are also&nbsp;pol=
ling for knowledge of any undisclosed&nbsp;IPR&nbsp;that applies to this Do=
cument, to ensure that&nbsp;IPR&nbsp;has been disclosed in compliance with =
IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669 and 5378 for more
 details).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"color:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"color:black;mso-fareast-language:EN-GB">If you are listed as=
 an Author or a Contributor of this document please respond to this email a=
nd indicate whether or not you are aware of any relevant undisclosed&nbsp;I=
PR. The Document won't progress without
 answers from all the Authors and Contributors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-lang=
uage:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-lang=
uage:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-lang=
uage:EN-GB">In addition, we are polling for knowledge of implementations</s=
pan><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"color:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-lang=
uage:EN-GB">Thank you,</span><span style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareast-lang=
uage:EN-GB">Matthew &amp; Stephane</span><span style=3D"color:black;mso-far=
east-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">&nb=
sp;</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">&nbsp;</span><span style=3D"colo=
r:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"orphans: auto; text-align: start; widows: a=
uto; -webkit-text-stroke-width: 0px; word-spacing: 0px; margin: 0cm; font-s=
ize: 12pt; font-family: Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
srv6-services/" style=3D"color: rgb(5, 99, 193); text-decoration: underline=
;">https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/</a><o:p>=
</o:p></span></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span lang=3D"EN-US" style=3D"color:black">[2]<span class=3D"apple-converte=
d-space">&nbsp;</span><a href=3D"https://mailarchive.ietf.org/arch/msg/bess=
/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" title=3D"https://mailarchiv=
e.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" style=3D"color: rgb(5=
, 99, 193); text-decoration: underline;">https://mailarchive.ietf.org/arch/=
msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0cm; font-size: 12pt; font-family: =
Calibri, sans-serif;">
<span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</div>
</blockquote>
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From: "Dongling Duan (duan)" <duan@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
Thread-Index: AQHWzyZ0Bef9LF0nqk6Yuqatdfqg8g==
Date: Thu, 10 Dec 2020 18:58:32 +0000
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From: "Dongling Duan (duan)" <duan@cisco.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
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Thread-Topic: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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Date: Thu, 10 Dec 2020 19:05:18 +0000
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Subject: Re: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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From: "Stephane Litkowski (slitkows)" <slitkows@cisco.com>
To: "draft-ietf-bess-evpn-ipvpn-interworking@ietf.org" <draft-ietf-bess-evpn-ipvpn-interworking@ietf.org>
CC: "bess@ietf.org" <bess@ietf.org>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: draft-ietf-bess-evpn-ipvpn-interworking chair review
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Date: Fri, 11 Dec 2020 15:35:14 +0000
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Subject: [bess] draft-ietf-bess-evpn-ipvpn-interworking chair review
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Hi Authors,


Please find below my chair review related to draft-ietf-bess-evpn-ipvpn-int=
erworking.

BTW, you need to refresh the draft now, it has expired.

Section 3:

  *   Nit:
s/uniqueness of the DOMAIN- ID/uniqueness of the DOMAIN-ID/


  *   a) I agree with DJ's comment on: "This attribute list may contain zer=
o, one or more segments". It is actually one or more.
  *   The section 3 contains both normative and non-normative language. If =
section 3 is intended to detail the normative behavior of adding/modifying =
D-PATH, it must use normative for any of the normative procedure. For insta=
nce b) may require normative language. While it is very good to have an exa=
mple in b), one or more clear normative rules are required before talking a=
bout the example.
  *   b) talks about domain-ids attached to IP-VRF, this is fine. However, =
the text should provide a wider view so people don't think that this is the=
 only option. Domain-Ids may be assigned at VRF level, but also at more a h=
igher level (BGP peer), or even lower level (bgp community...). We should n=
ot limit implementations here in the granularity domain-ids are defined.
  *   c) I don't see why "MUST NOT", it does not hurt to have a DOMAIN-ID a=
ssociated with non ISF world (routes learned from IGP, static)... there cou=
ld be design where people do BGP one leg and non-BGP on the other leg. We s=
hould probably relax that.

Would you mind adding a beautiful ASCII-ART for the attribute format ? It's=
 usually good to have when reading to see the attribute format rather than =
having to read the text.


You need to define the error handling procedures for D-PATH as per RFC7606 =
(you should have it as normative ref too).


Section 3.1
This sentence is misleading and does not match with the normative behavior =
of Section 3) d)

"In general, any interworking PE that imports an ISF route MUST flag

   the route as "looped" if its D-PATH contains a <DOMAIN-ID:ISF_SAFI_TYPE>=
 segment, where DOMAIN-ID matches a local DOMAIN-ID

   in the tenant IP-VRF."

I don't see the value of this section beyond providing an example. The norm=
ative behavior is already given in Section 3) d). Can't the example be pack=
ed under d).

Also the pointed sentence still refers to a DOMAIN-ID per VRF, which is not=
 good for a generic statement. My domain ID info could from the BGP peer co=
nfig. Again, this option of per VRF is fine, but this is not the only one t=
hat can be implemented.


Section 4.1:
I don't see why "no-propagation-mode" is the default mode. This is breaking=
 existing propagation of attributes from SAFI 1 to SAFI 128. When we have a=
 CE running BGP with a PE, the PE propagates the attributes (CTs, ASPATH, M=
ED...) coming from the CE.
This section creates some ambiguity about the D-PATH attribute. Based on Se=
ction 3, D-PATH will be necessarily sent but received D-PATH may be dropped=
 and new one created but the text of section 4.1 makes me think that it's n=
ot the case in no-propagation mode.
I think setting D-PATH is orthogonal to the attribute propagation.
As section 4.1 tells, people may still want to rely on existing SoO for ins=
tance in some case in this case D-PATH may not be added.
I think section 3 and 4.1 have to be more clear on the normative procedures=
 about D-PATH addition/modification.

Section 4.2:
Isn't it dangerous to try to define which attributes needs to be propagated=
, and which one should not be ? We are always creating new attributes, shou=
ld people update this doc each time a new attribute comes ? I don't really =
see how this could be managed.

Isn't there an indentation issue starting "When propagating an ISD route to=
 a different ISF SAFI..." ?

The considerations about ASPATH look really implementation details to me (a=
t least the way it is written). Basically the ASPATH propagation rules does=
n't change and the gateway function itself does not modify the ASPATH.

Similarly, for the IBGP-only path attributes, the word "copy" looks really =
implementation dependent. Why not telling that the advertised route should =
keep the received iBGP-only attribute ?
You should also clarify considerations regarding rfc6368.


Section 4.3:
Shouldn't we just follow existing aggregation rules of each attribute ? Aga=
in, what happens when new attributes are coming in. I don't think that the =
gateway function has actually something to change in the aggregation proces=
s. Aggregation is happening in the VRF, there is no change compared to what=
 is existing today, for VRF, it's just IP prefix aggregation.


However, as we are defining D-PATH, we can define aggregation rules related=
 to D-PATH.



Section 5:


"For a given prefix advertised in one or more non-EVPN ISF routes, the

   BGP best path selection procedure will produce a set of "non-EVPN

   best paths".  For a given prefix advertised in one or more EVPN ISF

   routes, the BGP best path selection procedure will produce a set of

   "EVPN best paths". >

I think the EVPN vs non EVPN paths is a bit misleading. Couldn't we simplif=
y say that we have best path selection at ISF level which inserts routes in=
 IP-VRF and then we have a new selection at VRF level.

Regarding the new tie-breakers:
It s not clear to me which steps tie breaks an IPVPN path vs an EVPN path (=
composite PE case) that are equivalent (only ISF changes).



Section 7:

I agree with Suresh's comment about the unclarity of the first bullet.
This document makes ISF 1 in the picture, so all the procedures defined in =
the document are applicable to all the combinations of ISFs including SAFI1=
 <-> SAFI 128. So the text must be written carefully.


Section 10:  This section should be at the top of the document.

Section 11:
You need a security consideration section.

Section 15:
IMO, intersubnet forwarding and prefix-adv drafts must be normative as they=
 are key components of the solution.



Pls update the draft and then I'll ask IDR to have a review on the draft as=
 well.


Brgds,

Stephane






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<p class=3D"MsoNormal">Hi Authors,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Please find below my chair revi=
ew related to draft-ietf-bess-evpn-ipvpn-interworking.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">BTW, you need to refresh the dr=
aft now, it has expired.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 3:<o:p></o:p></span></p=
>
<ul style=3D"margin-top:0cm" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0cm;mso-list:l0 level1 =
lfo1"><span lang=3D"EN-US">Nit:<o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-US">s/uniqueness of the DOMAIN- ID/=
uniqueness of the DOMAIN-ID/<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<ul style=3D"margin-top:0cm" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0cm;mso-list:l0 level1 =
lfo1"><span lang=3D"EN-US">a) I agree with DJ&#8217;s comment on: &#8220;Th=
is attribute list may contain zero, one or more segments&quot;. It is actua=
lly one or more.<o:p></o:p></span></li><li class=3D"MsoListParagraph" style=
=3D"margin-left:0cm;mso-list:l0 level1 lfo1"><span lang=3D"EN-US">The secti=
on 3 contains both normative and non-normative language. If section 3 is in=
tended to detail the normative behavior of adding/modifying D-PATH, it must=
 use
 normative for any of the normative procedure. For instance b) may require =
normative language. While it is very good to have an example in b), one or =
more clear normative rules are required before talking about the example.<o=
:p></o:p></span></li><li class=3D"MsoListParagraph" style=3D"margin-left:0c=
m;mso-list:l0 level1 lfo1"><span lang=3D"EN-US">b) talks about domain-ids a=
ttached to IP-VRF, this is fine. However, the text should provide a wider v=
iew so people don&#8217;t think that this is the only option. Domain-Ids
 may be assigned at VRF level, but also at more a higher level (BGP peer), =
or even lower level (bgp community&#8230;). We should not limit implementat=
ions here in the granularity domain-ids are defined.<o:p></o:p></span></li>=
<li class=3D"MsoListParagraph" style=3D"margin-left:0cm;mso-list:l0 level1 =
lfo1"><span lang=3D"EN-US">c) I don&#8217;t see why &#8220;MUST NOT&#8221;,=
 it does not hurt to have a DOMAIN-ID associated with non ISF world (routes=
 learned from IGP, static)&#8230; there could be design where
 people do BGP one leg and non-BGP on the other leg. We should probably rel=
ax that.<o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Would you mind adding a beautif=
ul ASCII-ART for the attribute format ? It&#8217;s usually good to have whe=
n reading to see the attribute format rather than having to read the text.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">You need to define the error ha=
ndling procedures for D-PATH as per RFC7606 (you should have it as normativ=
e ref too).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 3.1<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This sentence is misleading and=
 does not match with the normative behavior of Section 3) d)<o:p></o:p></sp=
an></p>
<pre><span lang=3D"EN-US">&#8220;<span style=3D"color:black">In general, an=
y interworking PE that imports an ISF route MUST flag<o:p></o:p></span></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"color:black">&nbsp;&nbsp; the route as &=
quot;looped&quot; if its D-PATH contains a &lt;DOMAIN-ID:ISF_SAFI_TYPE&gt; =
segment, where DOMAIN-ID matches a local DOMAIN-ID<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"color:black">&nbsp;&nbsp; in the tenant =
IP-VRF.&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black;mso-fareast-language:FR"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I don&#8217;t see the value of =
this section beyond providing an example. The normative behavior is already=
 given in Section 3) d). Can&#8217;t the example be packed under d).<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Also the pointed sentence still=
 refers to a DOMAIN-ID per VRF, which is not good for a generic statement. =
My domain ID info could from the BGP peer config. Again, this option of per=
 VRF is fine, but this is not the only
 one that can be implemented.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 4.1:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I don&#8217;t see why &#8220;no=
-propagation-mode&#8221; is the default mode. This is breaking existing pro=
pagation of attributes from SAFI 1 to SAFI 128. When we have a CE running B=
GP with a PE, the PE propagates the attributes (CTs, ASPATH,
 MED&#8230;) coming from the CE. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This section creates some ambig=
uity about the D-PATH attribute. Based on Section 3, D-PATH will be necessa=
rily sent but received D-PATH may be dropped and new one created but the te=
xt of section 4.1 makes me think that
 it&#8217;s not the case in no-propagation mode.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I think setting D-PATH is ortho=
gonal to the attribute propagation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">As section 4.1 tells, people ma=
y still want to rely on existing SoO for instance in some case in this case=
 D-PATH may not be added.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I think section 3 and 4.1 have =
to be more clear on the normative procedures about D-PATH addition/modifica=
tion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 4.2:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Isn&#8217;t it dangerous to try=
 to define which attributes needs to be propagated, and which one should no=
t be ? We are always creating new attributes, should people update this doc=
 each time a new attribute comes ? I don&#8217;t
 really see how this could be managed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Isn&#8217;t there an indentatio=
n issue starting &#8220;When propagating an ISD route to a different ISF SA=
FI&#8230;&#8221; ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The considerations about ASPATH=
 look really implementation details to me (at least the way it is written).=
 Basically the ASPATH propagation rules doesn&#8217;t change and the gatewa=
y function itself does not modify the ASPATH.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Similarly, for the IBGP-only pa=
th attributes, the word &#8220;copy&#8221; looks really implementation depe=
ndent. Why not telling that the advertised route should keep the received i=
BGP-only attribute ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">You should also clarify conside=
rations regarding rfc6368.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 4.3:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Shouldn&#8217;t we just follow =
existing aggregation rules of each attribute ? Again, what happens when new=
 attributes are coming in. I don&#8217;t think that the gateway function ha=
s actually something to change in the aggregation
 process. Aggregation is happening in the VRF, there is no change compared =
to what is existing today, for VRF, it&#8217;s just IP prefix aggregation.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">However, as we are defining D-P=
ATH, we can define aggregation rules related to D-PATH.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 5:<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"color:black">&#8220;For a given prefix a=
dvertised in one or more non-EVPN ISF routes, the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"color:black">&nbsp;&nbsp; BGP best path =
selection procedure will produce a set of &quot;non-EVPN<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US" style=3D"color:black">&nbsp;&nbsp; best paths&quo=
t;.&nbsp; For a given prefix advertised in one or more EVPN ISF<o:p></o:p><=
/span></pre>
<pre><span lang=3D"EN-US" style=3D"color:black">&nbsp;&nbsp; routes, the BG=
P best path selection procedure will produce a set of<o:p></o:p></span></pr=
e>
<pre><span lang=3D"EN-US" style=3D"color:black">&nbsp;&nbsp; </span><span s=
tyle=3D"color:black">&quot;EVPN best paths&quot;.&nbsp;&raquo;<o:p></o:p></=
span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I think the EVPN vs non EVPN pa=
ths is a bit misleading. Couldn&#8217;t we simplify say that we have best p=
ath selection at ISF level which inserts routes in IP-VRF and then we have =
a new selection at VRF level.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Regarding the new tie-breakers:=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">It s not clear to me which step=
s tie breaks an IPVPN path vs an EVPN path (composite PE case) that are equ=
ivalent (only ISF changes).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 7:<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I agree with Suresh&#8217;s com=
ment about the unclarity of the first bullet.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This document makes ISF 1 in th=
e picture, so all the procedures defined in the document are applicable to =
all the combinations of ISFs including SAFI1 &lt;-&gt; SAFI 128. So the tex=
t must be written carefully.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 10: &nbsp;This section =
should be at the top of the document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 11:<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">You need a security considerati=
on section.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 15:<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">IMO, intersubnet forwarding and=
 prefix-adv drafts must be normative as they are key components of the solu=
tion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Pls update the draft and then I=
&#8217;ll ask IDR to have a review on the draft as well.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Brgds,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Stephane<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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This email starts a two-week working group last call for
draft-ietf-bess-mvpn-evpn-aggregation-label-04 [1]

 

Please review the draft and send any comments to the BESS list. Also, please
indicate if you support publishing the draft as a standards track RFC.

 

This poll runs until the 28th December 2020

 

We are also polling for knowledge of any undisclosed IPR that applies to
this Document, to ensure that IPR has been disclosed in compliance with IETF
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

 

If you are listed as an Author or a Contributor of this document please
respond to this email and indicate whether or not you are aware of any
relevant undisclosed IPR. The Document won't progress without answers from
all the Authors and Contributors. 

There is currently one IPR disclosure.

 

In addition, we are polling for knowledge of implementations of this draft,
per the BESS policy in [2].   

 

Thank you,

Matthew & Stephane

 

 

[1]
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-label
/ 

[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw

 


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link=3D"#0563C1" vlink=3D"#954F72" style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>This email starts a =
two-week working group last call for&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'>draft-ietf-bess-mvpn-evp=
n-aggregation-label-04 [1]<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'>&nbsp;<o:p></o:p></span>=
</p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>Please review the draft =
and send any comments to the BESS list. Also, please indicate if you =
support publishing the draft as a standards track RFC.</span><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>&nbsp;</span><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>This&nbsp;poll&nbsp;runs=
 until the 28<sup>th</sup> December 2020</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black;mso-fareast-language:EN-GB'>&nbsp;</span><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'>We are =
also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;that =
applies to this Document, to ensure that&nbsp;IPR&nbsp;has been =
disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, =
4879, 3669 and 5378 for more details).<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p>&nbsp;</o:p></span>=
</p><p class=3DMsoNormal><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'>If you are listed as an =
Author or a Contributor of this document please respond to this email =
and indicate whether or not you are aware of any relevant =
undisclosed&nbsp;IPR. The Document won't progress without answers from =
all the Authors and Contributors.&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>There =
is currently one&nbsp;IPR&nbsp;disclosure.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'><o:p>&n=
bsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>In =
addition, we are polling for knowledge of implementations</span><span =
lang=3DEN-US> </span><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>of =
this draft, per the BESS policy in [2]. =
&nbsp;&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p>&nbsp;</o:p></span>=
</p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>Thank =
you,</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>Matthew=
 &amp; Stephane</span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-GB =
style=3D'font-size:11.0pt;color:black;mso-fareast-language:EN-GB'>&nbsp;<=
/span><span lang=3DEN-GB =
style=3D'color:black;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:black'>&nbsp;</span><span lang=3DEN-GB =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: =
auto;text-align:start;widows: auto;-webkit-text-size-adjust: =
auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span lang=3DEN-US =
style=3D'color:black'>[1]<span class=3Dapple-converted-space>&nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggreg=
ation-label/">https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-=
aggregation-label/</a> <o:p></o:p></span></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'color:black'>[2]<span =
class=3Dapple-converted-space>&nbsp;</span><a =
href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdk=
jqDpw" target=3D"_blank" =
title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEd=
kjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdk=
jqDpw</a></span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-GB =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></p></div></body></htm=
l>
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Cc: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>, "draft-mohanty-bess-weighted-hrw@ietf.org" <draft-mohanty-bess-weighted-hrw@ietf.org>
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Subject: Re: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-hrw-01
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Hi,

Support.

Thanks,
Neeraj

> On Dec 10, 2020, at 11:05 AM, Dongling Duan (duan) <duan=3D40cisco.com@dma=
rc.ietf.org> wrote:
>=20
> =EF=BB=BF
> Support
> =20
> Regards
> Dongling Duan
> =20
> From: BESS <bess-bounces@ietf.org> On Behalf Of Bocci, Matthew (Nokia - GB=
)
> Sent: Wednesday, December 9, 2020 1:23 AM
> To: bess@ietf.org
> Cc: draft-mohanty-bess-weighted-hrw@ietf.org
> Subject: [bess] WG adoption and IPR poll for draft-mohanty-bess-weighted-h=
rw-01
> =20
> Hello,
> =20
> This email begins a two-week WG adoption poll for draft-mohanty-bess-weigh=
ted-hrw-01 [1].
> =20
> Please review the draft and post any comments to the BESS working group li=
st.
> =20
> We are also polling for knowledge of any undisclosed IPR that applies to t=
his document, to ensure that IPR has been disclosed in compliance with IETF I=
PR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
> =20
> If you are listed as an author or a contributor of this document, please r=
espond to this email and indicate whether or not you are aware of any releva=
nt undisclosed IPR, copying the BESS mailing list. The document will not  pr=
ogress without answers from all of the authors and contributors.
> =20
> Currently, there are no IPR disclosures against this document.
> =20
> If you are not listed as an author or a contributor, then please explicitl=
y respond only if you are aware of any IPR that has not yet been disclosed i=
n conformance with IETF rules.
> =20
> This poll for adoption closes on 23rd December 2020.
> =20
> Regards,
> Matthew and Stephane
> =20
> [1]  https://datatracker.ietf.org/doc/draft-mohanty-bess-weighted-hrw/
> =20
> =20
> =20
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div><br></div>Hi,<div><br></div><div>Suppo=
rt.</div><div><br></div><div>Thanks,</div><div>Neeraj<br><div dir=3D"ltr"><b=
r><blockquote type=3D"cite">On Dec 10, 2020, at 11:05 AM, Dongling Duan (dua=
n) &lt;duan=3D40cisco.com@dmarc.ietf.org&gt; wrote:<br><br></blockquote></di=
v><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF

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<div class=3D"WordSection1">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language:=
ZH-CN">Support<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Regards<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Dongling Duan<o:p></=
o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#441D61;mso-fareast-language:ZH-=
CN">&nbsp;</span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0=
in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;mso-fareast-langua=
ge:ZH-CN">From:</span></b><span style=3D"font-size:11.0pt;mso-fareast-langua=
ge:ZH-CN"> BESS &lt;bess-bounces@ietf.org&gt;
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Wednesday, December 9, 2020 1:23 AM<br>
<b>To:</b> bess@ietf.org<br>
<b>Cc:</b> draft-mohanty-bess-weighted-hrw@ietf.org<br>
<b>Subject:</b> [bess] WG adoption and IPR poll for draft-mohanty-bess-weigh=
ted-hrw-01</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">Hello,</sp=
an><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">This email begins a two-week WG&n=
bsp;adoption&nbsp;poll<span class=3D"apple-converted-space">&nbsp;</span>for=
<span class=3D"apple-converted-space">&nbsp;</span>draft-mohanty-bess-weight=
ed-hrw-01</span><span class=3D"apple-converted-space"><span lang=3D"FR" styl=
e=3D"color:black">&nbsp;</span></span><span lang=3D"EN-GB" style=3D"color:bl=
ack">[1].</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">&nbsp;</sp=
an><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Please review the draft and post a=
ny comments to the BESS working group list.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">We are also&nbsp;polling for know=
ledge of any undisclosed IPR that applies to this document, to ensure that I=
PR has been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879=
, 3669 and 5378 for more details).</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">If you are listed as an author or=
 a contributor of this document, please respond to this email and indicate w=
hether or not you are aware of any relevant undisclosed IPR, copying the BES=
S mailing list. The document will
 not &nbsp;progress without answers from all of the authors and contributors=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Currently, there are no IPR discl=
osures against this document.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">If you are not listed as an autho=
r or a contributor, then please explicitly respond only if you are aware of a=
ny IPR that has not yet been disclosed in conformance with IETF rules.</span=
><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">This<span class=3D"apple-converte=
d-space">&nbsp;</span>poll<span class=3D"apple-converted-space">&nbsp;</span=
>for&nbsp;adoption&nbsp;closes on 23<sup>rd</sup> December 2020.</span><o:p>=
</o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Regards,</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">Matthew and Stephane</span><o:p><=
/o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"font-variant-caps: normal;orphans: auto;text=
-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke=
-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span lang=3D"EN-GB" style=3D"color:black">[1]&nbsp;<span class=3D"apple-con=
verted-space">&nbsp;</span><a href=3D"https://datatracker.ietf.org/doc/draft=
-mohanty-bess-weighted-hrw/">https://datatracker.ietf.org/doc/draft-mohanty-=
bess-weighted-hrw/</a></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">&nbsp;</sp=
an><o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">&nbsp;</sp=
an><o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">&nbsp=
;</span><o:p></o:p></p>
</div>


<span>_______________________________________________</span><br><span>BESS m=
ailing list</span><br><span>BESS@ietf.org</span><br><span>https://www.ietf.o=
rg/mailman/listinfo/bess</span><br></div></blockquote></div></body></html>=

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From: "Richard Vallee (rvallee)" <rvallee@cisco.com>
To: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>, "matthew.bocci@nokia.com" <matthew.bocci@nokia.com>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
Thread-Index: AQHW0cFEAEqLRuGYDk63YMQGJpwcdA==
Date: Mon, 14 Dec 2020 02:31:45 +0000
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "Stephane Litkowski (slitkows)" <slitkows@cisco.com>, "draft-ietf-bess-evpn-ipvpn-interworking@ietf.org" <draft-ietf-bess-evpn-ipvpn-interworking@ietf.org>
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Thread-Topic: draft-ietf-bess-evpn-ipvpn-interworking chair review
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From: "Xing James Jiang (jamjiang)" <jamjiang@cisco.com>
To: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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--_006_SJ0PR11MB50388B6E4807B8B9ACF66FFDCDCB0SJ0PR11MB5038namp_--


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From: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
To: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/zZBTB7GEbzcvIhiSHOztu8KMfB4>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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--_000_VI1PR0701MB6991C4F50F2CBF3F1127DE0AEBC70VI1PR0701MB6991_
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WG

I believe there is consensus to publish this draft as a Standards Track RFC=
.

There have been a number of statements expressing knowledge of implementati=
ons, in accordance with our implementation policy.

There was one comment on the specification of the size of the label field, =
but this comment was addressed in the subsequent discussion.

Please look out for my shepherd=92s review.

Best regards,

Matthew

From: Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.com>
Date: Monday, 30 November 2020 at 17:15
To: draft-ietf-bess-srv6-services@ietf.org <draft-ietf-bess-srv6-services@i=
etf.org>, bess@ietf.org <bess@ietf.org>
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6=
-services-05
This email starts a two-week working group last call for draft-ietf-bess-sr=
v6-services-05 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until Monday 14th December 2020.

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">WG<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I believe there is =
consensus to publish this draft as a Standards Track RFC.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">There have been a n=
umber of statements expressing knowledge of implementations, in accordance =
with our implementation policy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">There was one comme=
nt on the specification of the size of the label field, but this comment wa=
s addressed in the subsequent discussion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Please look out for=
 my shepherd=92s review.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Best regards,<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Matthew<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"col=
or:black">From:
</span></b><span style=3D"color:black">Bocci, Matthew (Nokia - GB) &lt;matt=
hew.bocci@nokia.com&gt;<br>
<b>Date: </b>Monday, 30 November 2020 at 17:15<br>
<b>To: </b>draft-ietf-bess-srv6-services@ietf.org &lt;draft-ietf-bess-srv6-=
services@ietf.org&gt;, bess@ietf.org &lt;bess@ietf.org&gt;<br>
<b>Subject: </b>WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-srv6-services-05</span><span style=3D"color:black;mso-fareast-language:E=
N-GB"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span style=3D"color:black;mso-fareast-language:EN-GB">draft-ie=
tf-bess-srv6-services-05 [1]</span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December =
2020.</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;=
that applies to this Document, to ensure that&nbsp;IPR&nbsp;has been disclo=
sed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).</span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">If you are listed as an Author or a Contributor of this document please =
respond to this email and indicate whether or not you are aware of any rele=
vant undisclosed&nbsp;IPR. The Document won't
 progress without answers from all the Authors and Contributors.&nbsp;</spa=
n></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">&nbsp;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;</span></span><a href=3D"https://datatracker.ietf.org/doc/dr=
aft-ietf-bess-srv6-services/"><span lang=3D"EN-US">https://datatracker.ietf=
.org/doc/draft-ietf-bess-srv6-services/</span></a></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span></span><a href=3D"https://mail=
archive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blan=
k" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SE=
dkjqDpw"><span lang=3D"EN-US">https://mailarchive.ietf.org/arch/msg/bess/cG=
3X1tTqb_vPC4rg56SEdkjqDpw</span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">&nbsp;</span></p>
</div>
</body>
</html>

--_000_VI1PR0701MB6991C4F50F2CBF3F1127DE0AEBC70VI1PR0701MB6991_--


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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Date: Mon, 14 Dec 2020 13:40:51 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/ZGyqI1nSxaLpueymZo1pRl88RRU>
Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Support as co-author.
Not aware of undisclosed IPRs.

Thanks.
Jeffrey

From: slitkows.ietf@gmail.com <slitkows.ietf@gmail.com>
Sent: Friday, December 11, 2020 10:53 AM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn=
-evpn-aggregation-label-04

[External Email. Be cautious of content]

This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-ie=
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hIQ2Qyck-IhPsNTvoUVHq9_WbhuJpdSm29iggmXHMd$>
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw<=
https://urldefense.com/v3/__https:/mailarchive.ietf.org/arch/msg/bess/cG3X1=
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TvoUVHq9_WbhuJpdSm29innUXCfH$>



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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Support as co-author.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Not aware of undisclosed IPRs.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN"><o:p>&nbsp;</o:p></span></p>
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:ZH-CN">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;mso-fareast-language=
:ZH-CN">Jeffrey<o:p></o:p></span></p>
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:ZH-CN"><o:p>&nbsp;</o:p></span></p>
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<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;mso-fareast-langu=
age:ZH-CN">From:</span></b><span style=3D"font-size:11.0pt;mso-fareast-lang=
uage:ZH-CN"> slitkows.ietf@gmail.com &lt;slitkows.ietf@gmail.com&gt;
<br>
<b>Sent:</b> Friday, December 11, 2020 10:53 AM<br>
<b>To:</b> draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.=
org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
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</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
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an lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB">draft-ie=
tf-bess-mvpn-evpn-aggregation-label-04 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">Please review the draft and send any comments to the BESS list. Also, pl=
ease indicate if you support publishing the draft as a standards track RFC.=
</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">This&nbsp;poll&nbsp;runs until the 28<sup>th</sup> December 2020</span><=
span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-G=
B">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;disclosure.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">In addition, we are polling for knowledge of implementa=
tions</span>
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">of =
this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" style=3D"color:bl=
ack;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-fare=
ast-language:EN-GB">Matthew &amp; Stephane</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><span lang=
=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"color:black">[1]<span class=3D"apple-converted-space">&nbsp;=
<a href=3D"https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draf=
t-ietf-bess-mvpn-evpn-aggregation-label/__;!!NEt6yMaO-gk!VsKlb3bwGdJiPc6lQE=
B2WThIQ2Qyck-IhPsNTvoUVHq9_WbhuJpdSm29iggmXHMd$">https://datatracker.ietf.o=
rg/doc/draft-ietf-bess-mvpn-evpn-aggregation-label/</a>
</span></span><span class=3D"apple-converted-space"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">[2]<span class=3D"apple-=
converted-space">&nbsp;</span><a href=3D"https://urldefense.com/v3/__https:=
/mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw__;!!NEt6yMa=
O-gk!VsKlb3bwGdJiPc6lQEB2WThIQ2Qyck-IhPsNTvoUVHq9_WbhuJpdSm29innUXCfH$" tar=
get=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTq=
b_vPC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_v=
PC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</div>
<br>
<p style=3D"font-family:Calibri;font-size:7pt;color:#000000;margin:15pt;" a=
lign=3D"Center">
Juniper Business Use Only<br>
</p>
</body>
</html>

--_000_MN2PR05MB5981DF69C4ED016C74AD6307D4C70MN2PR05MB5981namp_--


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From: Satoru Matsushima <satoru.matsushima@gmail.com>
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Cc: "draft-ietf-bess-srv6-services@ietf.org" <draft-ietf-bess-srv6-services@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-srv6-services-05
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Hello bess chairs,

I support the publication for this draft as a standard track RFC.=20
As a contributor, I am not aware of any IPRs related to the draft.=20

Cheers,
--satoru

> On Dec 1, 2020, at 2:16, Bocci, Matthew (Nokia - GB) <matthew.bocci@nokia.=
com> wrote:
> =EF=BB=BF
> This email starts a two-week working group last call for draft-ietf-bess-s=
rv6-services-05 [1]
> =20
> Please review the draft and send any comments to the BESS list. Also, plea=
se indicate if you support publishing the draft as a standards track RFC.
> =20
> This poll runs until Monday 14th December 2020.
> =20
> We are also polling for knowledge of any undisclosed IPR that applies to t=
his Document, to ensure that IPR has been disclosed in compliance with IETF I=
PR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
> =20
> If you are listed as an Author or a Contributor of this document please re=
spond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the A=
uthors and Contributors.=20
> There is currently one IPR disclosure.
> =20
> In addition, we are polling for knowledge of implementations of this draft=
, per the BESS policy in [2].  =20
> =20
> Thank you,
> Matthew & Stephane
> =20
> =20
> [1] https://datatracker.ietf.org/doc/draft-ietf-bess-srv6-services/
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=


--Apple-Mail-AF1CE5A4-3E8E-469F-B065-22D0EAE1C46C
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"><meta http-equiv=3D"conten=
t-type" content=3D"text/html; charset=3Dutf-8"><div dir=3D"ltr"><meta http-e=
quiv=3D"content-type" content=3D"text/html; charset=3Dutf-8"><div dir=3D"ltr=
"><meta http-equiv=3D"content-type" content=3D"text/html; charset=3Dutf-8"><=
div dir=3D"ltr"><meta http-equiv=3D"content-type" content=3D"text/html; char=
set=3Dutf-8"><div dir=3D"ltr"><meta http-equiv=3D"content-type" content=3D"t=
ext/html; charset=3Dutf-8"><span style=3D"caret-color: rgb(0, 0, 0); color: r=
gb(0, 0, 0);">Hello bess chairs,</span></div><div dir=3D"ltr"><span style=3D=
"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br></span></div><div dir=3D=
"ltr"><span style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">I supp=
ort the publication for this draft as a standard track RFC.&nbsp;</span></di=
v><div dir=3D"ltr">As a contributor, I am not aware of any IPRs related to t=
he draft.&nbsp;</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Cheers,</di=
v><div dir=3D"ltr"><div dir=3D"ltr"><div><div dir=3D"ltr">--satoru</div><div=
 dir=3D"ltr"><br><blockquote type=3D"cite">On Dec 1, 2020, at 2:16, Bocci, M=
atthew (Nokia - GB) &lt;matthew.bocci@nokia.com&gt; wrote:<br><br></blockquo=
te></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii">=

<meta name=3D"Generator" content=3D"Microsoft Word 15 (filtered medium)">
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">This email starts a two-week working group last call for&nb=
sp;</span><span style=3D"color:black;mso-fareast-language:EN-GB">draft-ietf-=
bess-srv6-services-05 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">Please review the draft and send any comments to the BESS l=
ist. Also, please indicate if you support publishing the draft as a standard=
s track RFC.</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">This&nbsp;poll&nbsp;runs until Monday 14th&nbsp;December 20=
20.</span><span style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareast=
-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
">We are also&nbsp;polling for knowledge of any undisclosed&nbsp;IPR&nbsp;th=
at applies to this Document, to ensure that&nbsp;IPR&nbsp;has been disclosed=
 in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669
 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
">If you are listed as an Author or a Contributor of this document please re=
spond to this email and indicate whether or not you are aware of any relevan=
t undisclosed&nbsp;IPR. The Document won't
 progress without answers from all the Authors and Contributors.&nbsp;<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;discl=
osure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">In addition, we are polling for knowledge o=
f implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-fareas=
t-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black;mso-fareast-language:EN-GB=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">Thank you,</span><span style=3D"color:blac=
k;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:=
black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span style=3D=
"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">&nbsp;</span><span style=3D"color:black;mso-fareast-langu=
age:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps:=
 normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust=
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<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converted=
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span c=
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Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Hi,

I support the publication of this draft as standards track RFC.
Thanks.
Jorge

From: BESS <bess-bounces@ietf.org> on behalf of slitkows.ietf@gmail.com <sl=
itkows.ietf@gmail.com>
Date: Friday, December 11, 2020 at 4:53 PM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org <draft-ietf-bess-m=
vpn-evpn-aggregation-label@ietf.org>, bess@ietf.org <bess@ietf.org>
Cc: bess-chairs@ietf.org <bess-chairs@ietf.org>
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04
This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Hi,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">I support the publication of this draft as standards track RFC.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Jorge<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"color:black">From: </span></b><span style=3D"color:black"=
>BESS &lt;bess-bounces@ietf.org&gt; on behalf of slitkows.ietf@gmail.com &l=
t;slitkows.ietf@gmail.com&gt;<br>
<b>Date: </b>Friday, December 11, 2020 at 4:53 PM<br>
<b>To: </b>draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org &lt;draft-i=
etf-bess-mvpn-evpn-aggregation-label@ietf.org&gt;, bess@ietf.org &lt;bess@i=
etf.org&gt;<br>
<b>Cc: </b>bess-chairs@ietf.org &lt;bess-chairs@ietf.org&gt;<br>
<b>Subject: </b>[bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">This email starts a two-week working group =
last call for&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-far=
east-language:EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04
 [1]</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">Please review the draft and send any commen=
ts to the BESS list. Also, please indicate if you support publishing the dr=
aft as a standards track RFC.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack;mso-fareast-language:EN-GB">This&nbsp;poll&nbsp;runs until the 28<sup>t=
h</sup> December 2020</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
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<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">We are also&nbsp;polling for=
 knowledge of any undisclosed&nbsp;IPR&nbsp;that applies to this Document, =
to ensure that&nbsp;IPR&nbsp;has been disclosed in compliance with
 IETF&nbsp;IPR&nbsp;rules (see RFCs 3979, 4879, 3669 and 5378 for more deta=
ils).</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">If you are listed as an Auth=
or or a Contributor of this document please respond to this email and indic=
ate whether or not you are aware of any
 relevant undisclosed&nbsp;IPR. The Document won't progress without answers=
 from all the Authors and Contributors.&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">There is currently one&nbs=
p;IPR&nbsp;disclosure.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">In addition, we are pollin=
g for knowledge of implementations</span>
<span style=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">of =
this draft, per the BESS policy in [2]. &nbsp;&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">Thank you,</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"font-siz=
e:11.0pt;color:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</sp=
an><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt;color:black;mso-fareast-language:EN-GB">&nbsp;</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">[1]<span class=3D"apple-converted-space">&nbsp;=
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggre=
gation-label/">https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-a=
ggregation-label/</a>
</span></span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">[2]<span class=3D"apple-converted-space">&nbsp;</span><a href=3D"https=
://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=
=3D"_blank" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_v=
PC4rg56SEdkjqDpw">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4=
rg56SEdkjqDpw</a></span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span lang=3D"EN-GB" st=
yle=3D"font-size:11.0pt">&nbsp;</span><o:p></o:p></p>
</div>
</body>
</html>

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Benjamin Kaduk has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: Discuss

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----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

Let's talk about what the requirements are for consistency across PEs in
the algorithm for selecting the Primary Upstream PE.  Section 4 notes
that "all the PEs of that MVPN [are required] to follow the same UMH
selection procedure", but leaves the option of non-revertive behavior as
something that "MAY also be supported by an implementation", without
requirement for consistency across all PEs.  It seems to me that if some
PEs use non-revertive behavior and others do not, then they will
disagree as to which PE is the Primary (or active) PE in some cases,
which seems to conflict with the initial guidance that all PEs needed to
pick the same one.  Is it perhaps that the PEs need to agree on which PE
is to be advertised as Primary but not necessarily to actually be using
that one for traffic?  Or am I missing something?


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Section 1

   Section 3 describes local procedures allowing an egress PE (a PE
   connected to a receiver site) to take into account the status of
   P-tunnels to determine the Upstream Multicast Hop (UMH) for a given
   (C-S, C-G).  [...]

Does it also apply to (C-*, C-G)?  (I'll just mention it once, but the
handling seems to be somewhat inconsistent throughout the document, with
(C-*,C-G) getting mentioned sometimes but not always, and no pattern
obvious to me for when it is or is not included.  I think I see some
instances where (C-*, C-G) does not make sense, so it would probably not
be a universal replacement.)

   Section 5 describes a "hot leaf standby" mechanism that can be used
   to improve failover time in MVPN.  The approach combines mechanisms
   defined in Section 3 and Section 4 has similarities with the solution
   described in [RFC7431] to improve failover times when PIM routing is
   used in a network given some topology and metric constraints.

nit: grammar issue around "has similarities with" (maybe needs a leading
"and"?)

   VPNs.  An operator would enable these mechanisms using a method
   discussed in Section 3 in combination with the redundancy provided by
   a standby PE connected to the source of the multicast flow, and it is
   assumed that all PEs in the network would support these mechanisms
   for the procedures to work.  In the case that a BGP implementation

Is it a matter of "the procedure will not work at all unless all PEs in
the network support it", or "only the PEs that support it will get the
benefits of it"?  [The next sentence suggests an anwer...]

Section 3

   Section 9.1.1 of [RFC6513] are applicable when using I-PMSI
   P-tunnels.  That document is a foundation for this document, and its
   processes all apply here.  Section 9.1.1 mandates the use of specific
   procedures for sending intra-AS I-PMSI A-D Routes.

(nit) the second "Section 9.1.1" is also referring to RFC 6513, not this
document, which would be the default interpretation of a bare section
reference.

(not-nit) The referenced procedure seems to be about processing, not
sending, intra-AS I-PMSI A-D routes.  Am I misreading something?

Section 3.1

   Different factors can be considered to determine the "status" of a
   P-tunnel and are described in the following sub-sections.  The
   optional procedures described in this section also handle the case
   the downstream PEs do not all apply the same rules to define what the
   status of a P-tunnel is (please see Section 6), and some of them will
   produce a result that may be different for different downstream PEs.

nit: I think it's better to put a word like "where" in "the case the
downtream PEs".

Section 3.1.3

   corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
   transitions from Up to Down state, the Upstream PE that is the
   ingress of the P-tunnel MUST NOT be considered a valid UMH.

(nit?) I'm not sure how much precedent there is for using "valid" in
this context -- IIUC the previous discussion of this process referred
only to whether a PE is a candidate for being the UMH.

Section 3.1.5

   When such a procedure is used, in the context where fast restoration
   mechanisms are used for the P-tunnels, a configurable timer MUST be
   set on the downstream PE to wait before updating the UMH, to let the
   P-tunnel restoration mechanism to execute its actions.  An
   implementation SHOULD use three seconds as the default value for this
   timer.

How does this interact with the value of the maximum inter-packet time?
Suppose that I know to expect at least one packet every ten seconds.  Do
I wait ten seconds after receiving the last packet and then another
three seconds, before engaging in an UMH change?

   In cases where this mechanism is used in conjunction with the method
   described in Section 5, no prior knowledge of the rate of the
   multicast streams is required; downstream PEs can compare reception
   on the two P-tunnels to determine when one of them is down.

This feels a little underspecified; is there a reference or more
guidance that we could give about turning a stream of received packets
on one tunnel into a maximum inter-packet time on another tunnel,
supposedly carrying the same traffic?

Section 3.1.6

      *  one octet-long field of TLV's Type value (Section 7.3)

      *  one octet-long field of the length of the Value field in octets

      *  variable length Value field.

      The length of a TLV MUST be multiple of four octets.

I assume this is the total length, not the value in the length field?

   The BFD Discriminator attribute MUST be considered malformed if its
   length is not a non-zero multiple of four.  If the attribute
   considered malformed, the UPDATE message SHALL be handled using the
   approach of Attribute Discard per [RFC7606].

nit: s/attribute considered/attribute is considered/

Section 3.1.6.1

   o  MUST periodically transmit BFD Control packets over the x-PMSI
      P-tunnel after the P-tunnel is considered established.  Note that
      the methods to declare a P-tunnel has been established are outside
      the scope of this specification.

Is there a good reference for how to choose the period of transmission?

   If the tracking of the P-tunnel by using a P2MP BFD session is
   enabled after the x-PMSI A-D Route has been already advertised, the
   x-PMSI A-D Route MUST be re-sent with precisely the same attributes
   as before and the BFD Discriminator attribute included.

Pedantically, it seems like "precisely the same attributes as before"
is incompatible with adding the BFD Discriminator attribute.  Phrasing
that discusses "the only change between the previous advertisement and
the new advertisement" would not suffer from such a potential issue.
(And similarly for when the BFD Discriminator attribute is to be
removed, a couple paragraphs later.)

Section 3.1.6.2

   o  MUST use the source IP address of the BFD Control packet, the
      value of the BFD Discriminator field, and the x-PMSI Tunnel
      Identifier [RFC6514] the BFD Control packet was received to
      properly demultiplex BFD sessions.

nit: missing word around "the BFD Control packet was received" (maybe
"received on/in"?).

   According to [RFC8562], if the downstream PE receives Down or
   AdminDown in the State field of the BFD Control packet or associated
   with the BFD session Detection Timer expires, the BFD session is

nit: "the BFD Detection Timer associated with the BFD session expires"

   PE, while others are considered as Standby Upstream PEs.  In such a
   scenario, when the P-tunnel is considered down, the downstream PE MAY
   initiate a switchover of the traffic from the Primary Upstream PE to
   the Standby Upstream PE only if the Standby Upstream PE is deemed
   available.

I'm not sure that we've defined what it means for an Upstream PE to be
deemed "available', yet.  I guess it's possible that there is not an
established P-Tunnel between the (selected) Standby Upstream PE and the
donstream PE, so just using the Up/Down/not-known-to-be-Down status of
that P-tunnel is not an option...

   If the downstream PE's P-tunnel is already established when the
   downstream PE receives the new x-PMSI A-D Route with BFD
   Discriminator attribute, the downstream PE MUST associate the value
   of BFD Discriminator field with the P-tunnel and follow procedures
   listed above in this section if and only if the x-PMSI A-D Route was
   properly processed as per [RFC6514], and the BFD Discriminator
   attribute was validated.

We did not discuss any validation of the BFD Discriminator attribute in
§3.1.6; what procedures would this process entail?

Section 4

   The procedures described below are limited to the case where the site
   that contains C-S is connected to two or more PEs, though, to
   simplify the description, the case of dual-homing is described.  The

I suggest giving at least some considerations to how to choose between
multiple standby Upstream PEs when there are more than one available.

   procedures require all the PEs of that MVPN to follow the same UMH
   selection procedure, as specified in [RFC6513], whether the PE
   selected based on its IP address, hashing algorithm described in
   section 5.1.3 of [RFC6513], or Installed UMH Route.  The procedures

I assume that how the PEs agree on which procedure is in use does not
involve something being advertised in-band, and is out of scope for this
document.  But please say so!

   assume that if a site of a given MVPN that contains C-S is dual-homed
   to two PEs, then all the other sites of that MVPN would have two
   unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with its RD.

nit: s/its RD/its own RD/
Also, please confirm that the unicast routes are *to* C-S, vs *from* it.

Section 4.1

   o  the NLRI is constructed as the C-multicast route with an RT that
      identifies the Primary Upstream PE, except that the RD is the same
      as if the C-multicast route was built using the Standby Upstream
      PE as the UMH (it will carry the RD associated to the unicast VPN
      route advertised by the Standby Upstream PE for S and a Route
      Target derived from the Standby Upstream PE's UMH route's VRF RT
      Import EC);

This part is a bit confusing to me, since the first part says that the
RT identifies the Primary Upstream PE, but the second part says that the
RT is derived from the Standy Upstream PE's [stuff].  But I'm happy to
trust you that the [stuff] makes it correct!

Section 4.2

      when the PE determines (the use of the particular method to detect
      the failure is outside the scope of this document) that C-S is not
      reachable through some other PE, the PE SHOULD install VRF PIM

It seems like a forward reference to §4.3 might be helpful.

   Section 9.3.2 of [RFC6514], describes the procedures of sending a
   Source-Active A-D Route as a result of receiving the C-multicast
   route.  These procedures MUST be followed for both the normal and
   Standby C-multicast routes.

There is no section 9.3.2 in RFC 6514.  There is a 9.2.3 that looks
perhaps plausible, though the string "Source-Active" does not appear in
it.

Section 4.4.2

   Source AS carried in the C-multicast route.  If the match is found,
   and the C-multicast route carries the Standby PE BGP Community, then
   the ASBR MUST perform as follows:

(I assume that there is room for local policy to modify this "MUST",
e.g., if needed to protect against some form of attack ... perhaps it
even goes without saying.)

Section 5

   o  Upstream PEs use the "hot standby" optional behavior and thus will
      forward traffic for a given multicast state as soon as they have
      whether a (primary) BGP C-multicast route or a Standby BGP
      C-multicast route for that state (or both)

nit: the grammar is a bit weird here, after "as soon as they have"; I'm
not confident that I could make an accurate suggestion for a fix.

Section 6

I could almost see the discussion of duplicate packets as being a
subsection of the security considerations, though I don't mind leaving
it as-is.

Section 8

We could perhaps make some pro forma note that the BFD Discriminator
attribute, like all BGP attributes, typically does not benefit from
cryptographic integrity protection and thus could be spoofed so as to be
different than what is actually used by the multipoint BFD head.  That
said, I'm willing to let this fall under the incorporated-by-reference
BGP security considerations.

Is it worth noting that operating in "hot" standby mode will increase
the general level of traffic on the VPN and thus susceptibility to DoS?

   This document uses P2MP BFD, as defined in [RFC8562], which, in turn,
   is based on [RFC5880].  Security considerations relevant to each
   protocol are discussed in the respective protocol specifications.  An
   implementation that supports this specification MUST use a mechanism
   to control the maximum number of P2MP BFD sessions that can be active
   at the same time.

What is the objective that this control is designed to achieve?  I can
"control the maximum number of sessions" by asserting the maximum number
to be an absurdly large value, but I don't think that would meet the
spirit of this requirement (it does meet the letter of the requirement).

   The methods described in Section 3.1 may produce false-negative state
   changes that can be the trigger for an unnecessary convergence in the
   control plane, ultimately negatively impacting the multicast service
   provided by the VPN.  An operator is expected to consider the network
   environment and use available controls of the mechanism used to
   determine the status of a P-tunnel.

We mentioned earlier (e.g., in §3.1) that similar negative effects can
occur when resiliency mechanisms at different layers interact; that
might be worth repeating here.




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From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Mon, 14 Dec 2020 19:56:48 -0500
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I support publication.

Thanks

Gyan


On Mon, Dec 14, 2020 at 7:35 PM <zhang.zheng@zte.com.cn> wrote:

> Support the advancement of this draft.
>
> Thanks,
>
> Sandy
> =E5=8E=9F=E5=A7=8B=E9=82=AE=E4=BB=B6
> *=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A*slitkows.ietf@gmail.com
> *=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A*draft-ietf-bess-mvpn-evpn-aggregati=
on-label@ietf.org;bess@ietf.org;
> *=E6=8A=84=E9=80=81=E4=BA=BA=EF=BC=9A*bess-chairs@ietf.org;
> *=E6=97=A5 =E6=9C=9F =EF=BC=9A*2020=E5=B9=B412=E6=9C=8811=E6=97=A5 23:54
> *=E4=B8=BB =E9=A2=98 =EF=BC=9A**[bess] WG Last Call, IPR and Implementati=
on Poll for
> draft-ietf-bess-mvpn-evpn-aggregation-label-04*
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>
> This email starts a two-week working group last call for draft-ietf-bess-=
mvpn-evpn-aggregation-label-04
> [1]
>
>
>
> Please review the draft and send any comments to the BESS list. Also,
> please indicate if you support publishing the draft as a standards track
> RFC.
>
>
>
> This poll runs until the 28th December 2020
>
>
>
> We are also polling for knowledge of any undisclosed IPR that applies to
> this Document, to ensure that IPR has been disclosed in compliance with
> IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
>
>
> If you are listed as an Author or a Contributor of this document please
> respond to this email and indicate whether or not you are aware of any
> relevant undisclosed IPR. The Document won't progress without answers fro=
m
> all the Authors and Contributors.
>
> There is currently one IPR disclosure.
>
>
>
> In addition, we are polling for knowledge of implementations of this
> draft, per the BESS policy in [2].
>
>
>
> Thank you,
>
> Matthew & Stephane
>
>
>
>
>
> [1]
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-la=
bel/
>
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDp=
w
>
>
>
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--=20

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *



*M 301 502-134713101 Columbia Pike *Silver Spring, MD

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<div><br></div><div dir=3D"auto">I support publication.</div><div dir=3D"au=
to"><br></div><div dir=3D"auto">Thanks=C2=A0</div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto">Gyan</div><div dir=3D"auto"><br></div><div dir=3D"auto=
"><br><div class=3D"gmail_quote" dir=3D"auto"><div dir=3D"ltr" class=3D"gma=
il_attr">On Mon, Dec 14, 2020 at 7:35 PM &lt;<a href=3D"mailto:zhang.zheng@=
zte.com.cn">zhang.zheng@zte.com.cn</a>&gt; wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;b=
order-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"=
><div><p style=3D"font-size:14px;font-family:arial">Support the advancement=
 of this draft.</p><p style=3D"font-size:14px;font-family:arial">Thanks,</p=
><p style=3D"font-size:14px;font-family:arial">Sandy</p><div><div style=3D"=
display:block"><div style=3D"width:100%;height:28px;line-height:28px;text-a=
lign:center;background-color:rgb(224,229,233);color:rgb(19,136,255)">=E5=8E=
=9F=E5=A7=8B=E9=82=AE=E4=BB=B6</div><div id=3D"m_-1587783393376749111zwrite=
HistoryContainer"><div><div style=3D"padding:8px;background-color:rgb(245,2=
46,248)"><div><strong>=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A</strong><span><a=
 href=3D"mailto:slitkows.ietf@gmail.com" target=3D"_blank">slitkows.ietf@gm=
ail.com</a><u></u><u></u></span></div><div><strong>=E6=94=B6=E4=BB=B6=E4=BA=
=BA=EF=BC=9A</strong><span style=3D"display:inline"><a href=3D"mailto:draft=
-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" target=3D"_blank">draft-ie=
tf-bess-mvpn-evpn-aggregation-label@ietf.org</a><u></u>;<u></u></span><span=
 style=3D"display:inline"><a href=3D"mailto:bess@ietf.org" target=3D"_blank=
">bess@ietf.org</a><u></u>;<u></u></span></div><div><strong>=E6=8A=84=E9=80=
=81=E4=BA=BA=EF=BC=9A</strong><span style=3D"display:inline"><a href=3D"mai=
lto:bess-chairs@ietf.org" target=3D"_blank">bess-chairs@ietf.org</a><u></u>=
;<u></u></span></div><div><strong>=E6=97=A5 =E6=9C=9F =EF=BC=9A</strong><sp=
an>2020=E5=B9=B412=E6=9C=8811=E6=97=A5 23:54</span></div><div><strong>=E4=
=B8=BB =E9=A2=98 =EF=BC=9A</strong><span><strong>[bess] WG Last Call, IPR a=
nd Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04</=
strong></span></div></div></div></div></div></div></div><div><div><div styl=
e=3D"display:block"><div id=3D"m_-1587783393376749111zwriteHistoryContainer=
"><div><div></div><div><div>_______________________________________________=
<br>BESS=C2=A0mailing=C2=A0list<br><a href=3D"mailto:BESS@ietf.org" target=
=3D"_blank">BESS@ietf.org</a><br><a href=3D"https://www.ietf.org/mailman/li=
stinfo/bess" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</=
a><br><br><div><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:b=
lack">This email starts a two-week working group last call for=C2=A0</span>=
<span lang=3D"EN-GB" style=3D"color:black">draft-ietf-bess-mvpn-evpn-aggreg=
ation-label-04 [1]<u></u><u></u></span></p><p class=3D"MsoNormal"><span lan=
g=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">Please review the=
 draft and send any comments to the BESS list. Also, please indicate if you=
 support publishing the draft as a standards track RFC.</span><span lang=3D=
"EN-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoNorma=
l"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</span><span lang=3D"EN=
-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoNormal">=
<span lang=3D"EN-US" style=3D"color:black">This=C2=A0poll=C2=A0runs until t=
he 28<sup>th</sup> December 2020</span><span lang=3D"EN-GB" style=3D"color:=
black"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US"=
 style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"color:bla=
ck"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" st=
yle=3D"color:black">We are also=C2=A0polling for knowledge of any undisclos=
ed=C2=A0IPR=C2=A0that applies to this Document, to ensure that=C2=A0IPR=C2=
=A0has been disclosed in compliance with IETF=C2=A0IPR=C2=A0rules (see RFCs=
 3979, 4879, 3669 and 5378 for more details).<u></u><u></u></span></p><p cl=
ass=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black"><u></u>=C2=A0<=
u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color=
:black">If you are listed as an Author or a Contributor of this document pl=
ease respond to this email and indicate whether or not you are aware of any=
 relevant undisclosed=C2=A0IPR. The Document won&#39;t progress without ans=
wers from all the Authors and Contributors.=C2=A0<u></u><u></u></span></p><=
p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;color:bl=
ack">There is currently one=C2=A0IPR=C2=A0disclosure.<u></u><u></u></span><=
/p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;colo=
r:black"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-US" style=3D"font-size:11pt;color:black">In addition, we are polling=
 for knowledge of implementations</span><span lang=3D"EN-US"> </span><span =
lang=3D"EN-US" style=3D"font-size:11pt;color:black">of this draft, per the =
BESS policy in [2]. =C2=A0=C2=A0<u></u><u></u></span></p><p class=3D"MsoNor=
mal"><span lang=3D"EN-GB" style=3D"color:black"><u></u>=C2=A0<u></u></span>=
</p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;col=
or:black">Thank you,</span><span lang=3D"EN-GB" style=3D"color:black"><u></=
u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"fo=
nt-size:11pt;color:black">Matthew &amp; Stephane</span><span lang=3D"EN-GB"=
 style=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoNormal"><spa=
n lang=3D"EN-GB" style=3D"font-size:11pt;color:black">=C2=A0</span><span la=
ng=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D"Mso=
Normal"><span lang=3D"EN-US" style=3D"color:black">=C2=A0</span><span lang=
=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p><p class=3D"MsoNo=
rmal" style=3D"font-variant-caps:normal;text-align:start;word-spacing:0px">=
<span lang=3D"EN-US" style=3D"color:black">[1]<span>=C2=A0<a href=3D"https:=
//datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-label/" ta=
rget=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-=
aggregation-label/</a> <u></u><u></u></span></span></p><p class=3D"MsoNorma=
l"><span lang=3D"EN-US" style=3D"color:black">[2]<span>=C2=A0</span><a href=
=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw"=
 title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdk=
jqDpw" target=3D"_blank">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tT=
qb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><u></u><u></u></span></=
p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11pt"><u><=
/u>=C2=A0<u></u></span></p></div></div></div></div></div></div></div><p><br=
></p></div>_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote></div></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" =
data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><div d=
ir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"l=
tr"><div><p style=3D"color:rgb(34,34,34)"><a href=3D"http://www.verizon.com=
/" style=3D"color:rgb(17,85,204);padding-bottom:1em;display:inline-block" t=
arget=3D"_blank"><img src=3D"http://ss7.vzw.com/is/image/VerizonWireless/vz=
-logo-email" width=3D"81" height=3D"18" style=3D"height:18px;width:81px"></=
a><br></p><p style=3D"font-size:1em;margin:0px;font-family:&quot;Verizon NH=
G DS&quot;,Arial,sans-serif;line-height:13px;color:black"><b>Gyan Mishra</b=
></p><p style=3D"color:rgb(34,34,34);margin:0px;line-height:13px"><font fac=
e=3D"georgia, serif" style=3D"color:black;font-size:1em"><i>Network Solutio=
ns A</i></font><font color=3D"#000000" face=3D"georgia, serif"><i>rchitect=
=C2=A0</i></font></p><p style=3D"font-size:1em;margin:0px;line-height:13px;=
color:black"><i><font face=3D"georgia, serif">M 301 502-1347<br>13101 Colum=
bia Pike=C2=A0<br></font></i>Silver Spring, MD</p></div><div><br></div></di=
v></div></div></div></div></div></div></div>

--0000000000006ad70b05b6763c9a--


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From: Zhuangshunwan <zhuangshunwan@huawei.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Date: Tue, 15 Dec 2020 01:08:25 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Hi,

I support publishing this draft as standards track RFC.

Thanks,
Shunwan


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of slitkows.ietf@gmail.=
com
Sent: Friday, December 11, 2020 11:53 PM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04

This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Hi,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">I support publishing this draft as standards track RFC.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Shunwan<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>slitkows.ietf@gmail.com<br>
<b>Sent:</b> Friday, December 11, 2020 11:53 PM<br>
<b>To:</b> draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.=
org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until the 28<sup>th</sup> Decemb=
er 2020</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
mvpn-evpn-aggregation-label/">https://datatracker.ietf.org/doc/draft-ietf-b=
ess-mvpn-evpn-aggregation-label/</a>
</span></span><span class=3D"apple-converted-space"><span lang=3D"EN-US"><o=
:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
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To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "bess@ietf.org" <bess@ietf.org>, "draft-skr-bess-evpn-redundant-mcast-source@ietf.org" <draft-skr-bess-evpn-redundant-mcast-source@ietf.org>
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Subject: Re: [bess] WG adoption for draft-skr-bess-evpn-redundant-mcast-source
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--_000_B582DEB4D1B64CE8A3297CB625A56FBAciscocom_--


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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

- This document should expand acronyms on first use, particularly those in the
Abstract.

- Similarly, a couple of new paragraphs in Section 1 would be a useful boot
camp for concepts like PEs, P-Multicast, C-Multicast, BFD, RT, etc. I spent
some time in RFC 6513 and I'm still pretty unclear on these.

- The last paragraph of S1 describes "protection for multicast services". Can
you elaborate what this is protection from? The latency associated with tunnel
failure?

- In Section 3.1.6, please clarify if the length field of the TLV must be a
multiple of 4 octets, or the entire TLV (including type and length) should be a
multiple of 4. From context, I suspect the latter is true, but it could easily
be misread otherwise.

- Sec 5. I think you should delete the word "whether"




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----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

(1) This document describes several methods to determine the status of a
tunnel (in §3), none of which "provide a "fast failover" solution when used
alone, but can be used together with the mechanism described in Section 4"
(§1).  §3 also says this:

   An implementation may support any combination of the methods
   described in this section and provide a network operator with control
   to choose which one to use in the particular deployment.

While §3.1 is clear in the fact that it is not a requirement for all
downstream PEs to use the same mechanism, there are no guidelines to aid the
operator to chose which mechanism to use.  Some cases may be obvious (e.g.
§3.1.3 applies to tunnels of a specific type), but others are not.  I would
like to see deployment considerations related to the advantages/disadvantages
that each method may have in specific situations (including their possible
combination).


(2) The BFD Discriminator Attribute has a very narrow application in this
document when compared to the potential other uses given the extensibility
possibilities related to bootstrapping BFD.  I have serious concerns about
the attribute being defined in this document, amongst a series of other
mechanisms.

(2a) The tunnel can be monitored without the new BGP Attribute (assuming
proper configuration of course).  Why is that option is not even mentioned in
the document?

In fact, the document recommends deleting the BFD session if the Attribute is
not present.  Why is that recommendation in place, and what are the cases when
it can not be followed?


(2b) The fact that BFD monitoring can be achieved without the new attribute
makes me think that the bootstrapping of BFD using BGP would be better served
in a document produced by the BFD WG.  One of the editors has expressed the
same opinion [1] [2].  Has a discussion taken place in the BFD WG (or at least
with the Chairs) about this work?  Why was it not taken up there?


[1] https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c/
[2] https://tools.ietf.org/wg/bess/minutes?item=minutes-96-bess.html


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

(0) I support Ben's DISCUSS.


(1) This document (currently) specifies a new BGP attribute, but I couldn't
find any discussion about it in the idr mailing list.  Has idr been given the
opportunity to review?


(2) s/is an OPTIONAL procedure/is an optional procedure
This is not a normative statement to require capitalization.


(3) "VRF Route Import BGP attribute" is mentioned twice (§3 and §5), but it is
not an attribute; it is an extended community (rfc6514).


(4) §3.1.1: "similar to BGP next-hop tracking"  Is this specified somewhere?
I don't remember seeing a specification for next-hop tracking, but do know
that implementations do it -- in an implementation-specific way.  Please add a
little more text about what is meant/expected.


(5) §3.1.1: "If BGP next-hop tracking is done...and the root
address...[is]...the same as the next-hop address...then checking...whether
the tunnel root is reachable, will be unnecessary duplication...."  I guess
this means that the existing next-hop tracking functionality can be used and
that it doesn't have to be function-specific (root vs next-hop).  This
paragraph seems to assume a specific implementation -- but again, given that
next-hop tracking implementations are internal then this paragraph doesn't
make much sense to me.


(6) The "reachability condition" is mentioned in §3.1.1/§3.1.3/§3.1.4.  Does
this mean that that root tracking (§3.1.1) should be used with the other
mechanisms?  The specific text says that "the downstream PE can immediately
update its UMH when the reachability condition changes", giving the impression
that the combination is possible but not required.

Note that §4.3 is titled "Reachability Determination", which I hoped would
shed more light, but all it does is point back to §3.1.


(7) §3.1.2: What is the "last-hop link" of the tunnel?  Is it the physical
link, or the virtual hop from the previous waypoint?


(8) §3.1.2 mentions that "careful consideration and coordination" is needed
when using other mechanisms such as rfc4090 "because uncorrelated timers might
cause unnecessary switchovers and destabilize the network."  What are the
associated timers related to the mechanisms in this section?


(9) §3.1.3:

   When using this method and if the signaling state for a P2MP TE LSP
   is removed (e.g., if the ingress of the P2MP TE LSP sends a PathTear
   message) or the P2MP TE LSP changes state from Up to Down as
   determined by procedures in [RFC4875], the status of the
   corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
   transitions from Up to Down state, the Upstream PE that is the
   ingress of the P-tunnel MUST NOT be considered a valid UMH.

These two sentences are redundant.  It seems to me that they could be
replaced by:

   When using this method and if the signaling state for a P2MP TE LSP
   is removed (e.g., if the ingress of the P2MP TE LSP sends a PathTear
   message) or the P2MP TE LSP changes state from Up to Down as
   determined by procedures in [RFC4875], the Upstream PE that is the
   ingress of the P-tunnel MUST NOT be considered a valid UMH.


(10) §3.1.4: "An Upstream PE SHOULD be removed from the UMH candidate
list...if...the upstream one-hop branch of the tunnel from P to PE cannot be
built."   When is it ok to not remove the PE?  IOW, why is this action not
required?


(11) [nit] s/mechanism to execute its actions/mechanism execute its actions


(12) §3.1.5 says that "where this mechanism is used in conjunction with the
method described in Section 5...downstream PEs can compare reception on the
two P-tunnels to determine when one of them is down", but §5 says that
"downstream PEs accept traffic from the primary or standby tunnel, based on
the status of the tunnel (based on Section 3)".  IOW, §3.1.5 points at §5 as
providing a way to determine if a tunnel is down, while §5 points back at §3
as the way to determine which tunnel to receive from.  This pointing back and
forth is not a total contradiction, but it needs to be clarified.


(13) §3.1.6: "An implementation that does not recognize or is configured not
to support this attribute MUST follow procedures defined for optional
transitive path attributes in Section 5 of [RFC4271]."

There cannot be a Normative action specified for a node that "does not
recognize...this attribute" because, by definition, it can't be assumed that
it is aware of this specification.  In this case, it is not necessary to say
anything about unrecognized attributes because that is already specified in
rfc4271.

For the "configured not to support this attribute" case, it should be pointed
out that the node should operate as if the attribute was unrecognized.

Suggestion>
   An implementation that is configured not to support this attribute MUST
   follow the procedures defined in Section 5 of [RFC4271] as if the attribute
   was unrecognized.


(14) [nit] s/BFD Mode field is the one octet long./The BFD Mode field is one
octet long.


(15) §3.1.6: "The BFD Discriminator attribute MUST be considered malformed if
its length is not a non-zero multiple of four."  Ok, except that the
specification of the attribute doesn't mention the length (only the length of
the TLVs).  Please specify the length and any considerations related to the
Extended Length bit.  Also, given that this is a new attribute, with an
unspecified potential number of TLVs, and that the length is apparently
unbounded, all leading to the potential need for extended messages, please
specify how to handle peers that cannot accommodate more than 4k octet
messages (rfc8654).


(16) §3.1.6.1: "MUST set the IP destination address of the inner IP header to
one of the internal loopback addresses..."   Where do these addresses come
from?  How does the Upstream PE figure out which one to use?  At least please
include a reference to where that is explained.


(17) §3.1.6.1: "MUST use its IP address as the source IP address"  Which
address?  Please be specific.


(18) §3.1.6.2: If the IP address doesn't map correctly at the downstream PE
(for example, a different local address is used that doesn't correspond to the
information in the PMSI attribute), what action should it take?  Can the
tunnel still be monitored?


(19) §3.1.6.2: "SHOULD NOT switch the traffic to the Standby Upstream PE"
When is it ok to do it?  IOW, why is this action recommended, and not
required.


(20) §3.1.7: "set the bfd.LocalDiag of the P2MP BFD session to Concatenated
Path Down and/or Reverse Concatenated Path Down"    Which one?  bfd.LocalDiag
carries a single value.


(21) §3.1.7: "...it is desired for the downstream PEs to switch to a backup
Upstream PE.  To achieve that...it SHOULD set the bfd.LocalDiag..."  If not
set, then the objective won't be achieved.  When is it ok to not set the
bfd.LocalDiag to indicate the concatenated failure?


(22) §4: "Such behavior is referred to as "revertive" behavior and MUST be
supported."  The text around this sentence seems to indicate that the
revertive behavior is the default, is that the intent?  Or if the intent for
it just to be supported (as written)?  Please be clear.


(23) §4.1: "...routes that carry the "Standby PE" BGP Community MUST have the
LOCAL_PREF attribute set to zero."  What should a receiver do if the
LOCAL_PREF is not zero?


(24) §4.1: In the last paragraph of this section, if I follow correctly, the
text talks about the case where the standby becomes the primary and the
updated advertisement doesn't have the Standby PE community.  If that is
correct, then s/ presence/absence of the Standby PE BGP Community/ absence of
the Standby PE BGP Community

Also, the last sentence says that the "LOCAL_PREF attribute MUST be set to
zero".  If the community is not present, how can a receiver enforce this?
What action should it take if the LOCAL_PREF has a different value?


(25) §4.3: "other mechanisms MAY be used"   s/MAY/may   This is just a
statement of fact.


(26) §4.4.2: "MUST try to locate"   To try is not an action that can be
normatively enforced.   Also, I don't think that using "MUST" here adds value
since the normative action is in the next sentence ("MUST perform as
follows"). s/MUST/must


(27) s/"hot root standby" mode is used (Section 4)/"hot root standby" mode is
used (Section 5)


(28) §7.3: s/sub-TLV/TLV/g   The attribute includes TLVs, not sub-TLVs.




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From: Chenshuanglong <chenshuanglong@huawei.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Date: Wed, 16 Dec 2020 03:53:30 +0000
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I support publication.

Thanks
Shuanglong Chen

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of slitkows.ietf@gmail.=
com
Sent: Friday, December 11, 2020 11:53 PM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04

This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US">I support publication.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Shuanglong Chen</span><span lan=
g=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>slitkows.ietf@gmail.com<br>
<b>Sent:</b> Friday, December 11, 2020 11:53 PM<br>
<b>To:</b> draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.=
org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until the 28<sup>th</sup> Decemb=
er 2020</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
mvpn-evpn-aggregation-label/">https://datatracker.ietf.org/doc/draft-ietf-b=
ess-mvpn-evpn-aggregation-label/</a>
</span></span><span class=3D"apple-converted-space"><span lang=3D"EN-US"><o=
:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
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From: "Xiejingrong (Jingrong)" <xiejingrong@huawei.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Date: Wed, 16 Dec 2020 04:26:49 +0000
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Yes, support publishing the draft.

Thanks
Jingrong

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of slitkows.ietf@gmail.=
com
Sent: Friday, December 11, 2020 11:53 PM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04

This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Yes, support publishing the draft.<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Thanks<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>slitkows.ietf@gmail.com<br>
<b>Sent:</b> Friday, December 11, 2020 11:53 PM<br>
<b>To:</b> draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.=
org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until the 28<sup>th</sup> Decemb=
er 2020</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
mvpn-evpn-aggregation-label/">https://datatracker.ietf.org/doc/draft-ietf-b=
ess-mvpn-evpn-aggregation-label/</a>
</span></span><span class=3D"apple-converted-space"><span lang=3D"EN-US"><o=
:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</body>
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From nobody Wed Dec 16 02:05:32 2020
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Éric Vyncke has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: Abstain

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Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for the work put into this document.

I have balloted ABSTAIN in the sense of "I oppose this document but understand
that others differ and am not going to stand in the way of the others." because
of the use outside of a node of the IPv4-mapped IPv6 addresses in section
3.1.6.1. A reply on this topic will be welcome.

Stéphane in his doc shepherd's write up states that no implementation is known
for a document born in 2008... Does the IETF really want to have this on the
proposed standards track ?

Please find below my ABSTAIN point, some non-blocking COMMENT points (but
replies would be appreciated), and one nits.

I hope that this helps to improve the document,

Regards,

-éric

== ABSTAIN ==
-- Section 3.1.6.1 --
I appreciate that the BFD WG relies on "::ffff:127.0.0.0/104" but those
IPv4-mapped IPv6 addresses are assumed to never leave a node and should never
be transmitted over the Internet (see
https://tools.ietf.org/html/rfc5156#section-2.2). This is the cause of my
ABSTAIN. As the inner packet is sent over a tunnel, why not using the a
link-local address or the ff02::1 link-local multicast group ?

== COMMENTS ==

-- Section 2.3 --
The use of "upstream" and "Upstream" could be confusing... The latter could
have been "Upstream PE/ABSR" (often used later in the document) or "ingress
node"

-- Section 3.1.6 --
Could the "BFD Discreminator" attribute be used for other purpose than this
document? If so, then why not specifying it in *another* document?

Should this document clearly state that it does not define any TLV ?

== NITS ==

As I am probably not the only reader have difficulties to remember RFC contents
by their number, may I suggest to prefix the RFC numbers with their titles ?
Esp in the introduction ;-)




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Hi Eric,

Speaking as BESS WG chair, you raised a very valid point on the =
publication of documents that have no implementation (or plan of =
implementation). This is also a concern that I have in general, as we =
cannot really prove that a technology/specification is working properly =
if it hasn't been implemented.
I think the discussion is a bit orthogonal to this particular document.
In the routing area, each WG is free to have its own policy regarding =
implementations. In BESS, the WG decided that there will be an =
implementation poll then if there is no implementation, and if WG is =
still fine progressing the doc without an implementation, the document =
will continue until publication. Good or bad that could be discussed but =
this is the WG consensus (it was there before I took over the chair =
seat). This policy differs across WGs.
I don't think that the date of the doc really matters, even if the doc =
was more recent, nothing says that there will be an implementation in =
future, so situation will be the same. I personally don't like having =
non implemented specs but it's not just up to me and again this goes =
beyond just this document.

Brgds,

Stephane

-----Original Message-----
From: =C3=89ric Vyncke via Datatracker <noreply@ietf.org>=20
Sent: mercredi 16 d=C3=A9cembre 2020 11:06
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-bess-mvpn-fast-failover@ietf.org; bess-chairs@ietf.org; =
bess@ietf.org; Stephane Litkowski <slitkows.ietf@gmail.com>; =
slitkows.ietf@gmail.com
Subject: =C3=89ric Vyncke's Abstain on =
draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)

=C3=89ric Vyncke has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: Abstain

When responding, please keep the subject line intact and reply to all =
email addresses included in the To and CC lines. (Feel free to cut this =
introductory paragraph, however.)


Please refer to =
https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for the work put into this document.

I have balloted ABSTAIN in the sense of "I oppose this document but =
understand that others differ and am not going to stand in the way of =
the others." because of the use outside of a node of the IPv4-mapped =
IPv6 addresses in section 3.1.6.1. A reply on this topic will be =
welcome.

St=C3=A9phane in his doc shepherd's write up states that no =
implementation is known for a document born in 2008... Does the IETF =
really want to have this on the proposed standards track ?

Please find below my ABSTAIN point, some non-blocking COMMENT points =
(but replies would be appreciated), and one nits.

I hope that this helps to improve the document,

Regards,

-=C3=A9ric

=3D=3D ABSTAIN =3D=3D
-- Section 3.1.6.1 --
I appreciate that the BFD WG relies on "::ffff:127.0.0.0/104" but those =
IPv4-mapped IPv6 addresses are assumed to never leave a node and should =
never be transmitted over the Internet (see =
https://tools.ietf.org/html/rfc5156#section-2.2). This is the cause of =
my ABSTAIN. As the inner packet is sent over a tunnel, why not using the =
a link-local address or the ff02::1 link-local multicast group ?

=3D=3D COMMENTS =3D=3D

-- Section 2.3 --
The use of "upstream" and "Upstream" could be confusing... The latter =
could have been "Upstream PE/ABSR" (often used later in the document) or =
"ingress node"

-- Section 3.1.6 --
Could the "BFD Discreminator" attribute be used for other purpose than =
this document? If so, then why not specifying it in *another* document?

Should this document clearly state that it does not define any TLV ?

=3D=3D NITS =3D=3D

As I am probably not the only reader have difficulties to remember RFC =
contents by their number, may I suggest to prefix the RFC numbers with =
their titles ?
Esp in the introduction ;-)





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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "'The IESG'" <iesg@ietf.org>, "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
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Date: Wed, 16 Dec 2020 13:13:15 +0000
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From: Rishabh Parekh <rishabhp@gmail.com>
Date: Wed, 16 Dec 2020 10:12:17 -0800
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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I support publication of this draft as standards track RFC.

Thanks,
-Rishabh

On Fri, Dec 11, 2020 at 7:53 AM <slitkows.ietf@gmail.com> wrote:

> This email starts a two-week working group last call for draft-ietf-bess-mvpn-evpn-aggregation-label-04
> [1]
>
>
>
> Please review the draft and send any comments to the BESS list. Also,
> please indicate if you support publishing the draft as a standards track
> RFC.
>
>
>
> This poll runs until the 28th December 2020
>
>
>
> We are also polling for knowledge of any undisclosed IPR that applies to
> this Document, to ensure that IPR has been disclosed in compliance with
> IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
>
>
> If you are listed as an Author or a Contributor of this document please
> respond to this email and indicate whether or not you are aware of any
> relevant undisclosed IPR. The Document won't progress without answers from
> all the Authors and Contributors.
>
> There is currently one IPR disclosure.
>
>
>
> In addition, we are polling for knowledge of implementations of this
> draft, per the BESS policy in [2].
>
>
>
> Thank you,
>
> Matthew & Stephane
>
>
>
>
>
> [1]
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-label/
>
> [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

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<div dir=3D"ltr"><div>I support publication of this draft as standards trac=
k RFC.</div><div><br></div><div>Thanks,</div><div>-Rishabh<br></div></div><=
br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri,=
 Dec 11, 2020 at 7:53 AM &lt;<a href=3D"mailto:slitkows.ietf@gmail.com">sli=
tkows.ietf@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204=
);padding-left:1ex"><div style=3D"overflow-wrap: break-word;" lang=3D"FR"><=
div class=3D"gmail-m_-7249261702966486642WordSection1"><p class=3D"MsoNorma=
l"><span style=3D"color:black" lang=3D"EN-US">This email starts a two-week =
working group last call for=C2=A0</span><span style=3D"color:black" lang=3D=
"EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04 [1]<u></u><u></u></s=
pan></p><p class=3D"MsoNormal"><span style=3D"color:black" lang=3D"EN-GB">=
=C2=A0<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:=
black" lang=3D"EN-US">Please review the draft and send any comments to the =
BESS list. Also, please indicate if you support publishing the draft as a s=
tandards track RFC.</span><span style=3D"color:black" lang=3D"EN-GB"><u></u=
><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:black" lang=
=3D"EN-US">=C2=A0</span><span style=3D"color:black" lang=3D"EN-GB"><u></u><=
u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:black" lang=3D=
"EN-US">This=C2=A0poll=C2=A0runs until the 28<sup>th</sup> December 2020</s=
pan><span style=3D"color:black" lang=3D"EN-GB"><u></u><u></u></span></p><p =
class=3D"MsoNormal"><span style=3D"color:black" lang=3D"EN-US">=C2=A0</span=
><span style=3D"color:black" lang=3D"EN-GB"><u></u><u></u></span></p><p cla=
ss=3D"MsoNormal"><span style=3D"color:black" lang=3D"EN-GB">We are also=C2=
=A0polling for knowledge of any undisclosed=C2=A0IPR=C2=A0that applies to t=
his Document, to ensure that=C2=A0IPR=C2=A0has been disclosed in compliance=
 with IETF=C2=A0IPR=C2=A0rules (see RFCs 3979, 4879, 3669 and 5378 for more=
 details).<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"co=
lor:black" lang=3D"EN-GB"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"color:black" lang=3D"EN-GB">If you are listed as an Aut=
hor or a Contributor of this document please respond to this email and indi=
cate whether or not you are aware of any relevant undisclosed=C2=A0IPR. The=
 Document won&#39;t progress without answers from all the Authors and Contr=
ibutors.=C2=A0<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=
=3D"font-size:11pt;color:black" lang=3D"EN-US">There is currently one=C2=A0=
IPR=C2=A0disclosure.<u></u><u></u></span></p><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:11pt;color:black" lang=3D"EN-US"><u></u>=C2=A0<u></u></sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-size:11pt;color:black" la=
ng=3D"EN-US">In addition, we are polling for knowledge of implementations</=
span><span lang=3D"EN-US"> </span><span style=3D"font-size:11pt;color:black=
" lang=3D"EN-US">of this draft, per the BESS policy in [2]. =C2=A0=C2=A0<u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:black" la=
ng=3D"EN-GB"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span st=
yle=3D"font-size:11pt;color:black" lang=3D"EN-US">Thank you,</span><span st=
yle=3D"color:black" lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"Mso=
Normal"><span style=3D"font-size:11pt;color:black" lang=3D"EN-US">Matthew &=
amp; Stephane</span><span style=3D"color:black" lang=3D"EN-GB"><u></u><u></=
u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11pt;color:bla=
ck" lang=3D"EN-GB">=C2=A0</span><span style=3D"color:black" lang=3D"EN-GB">=
<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:black"=
 lang=3D"EN-US">=C2=A0</span><span style=3D"color:black" lang=3D"EN-GB"><u>=
</u><u></u></span></p><p class=3D"MsoNormal" style=3D"font-variant-caps:nor=
mal;text-align:start;word-spacing:0px"><span style=3D"color:black" lang=3D"=
EN-US">[1]<span class=3D"gmail-m_-7249261702966486642apple-converted-space"=
>=C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evp=
n-aggregation-label/" target=3D"_blank">https://datatracker.ietf.org/doc/dr=
aft-ietf-bess-mvpn-evpn-aggregation-label/</a> <u></u><u></u></span></span>=
</p><p class=3D"MsoNormal"><span style=3D"color:black" lang=3D"EN-US">[2]<s=
pan class=3D"gmail-m_-7249261702966486642apple-converted-space">=C2=A0</spa=
n><a href=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56S=
EdkjqDpw" title=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC=
4rg56SEdkjqDpw" target=3D"_blank">https://mailarchive.ietf.org/arch/msg/bes=
s/cG3X1tTqb_vPC4rg56SEdkjqDpw</a></span><span lang=3D"EN-GB"><u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span style=3D"font-size:11pt" lang=3D"EN=
-GB"><u></u>=C2=A0<u></u></span></p></div></div>___________________________=
____________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote></div>

--000000000000741cb505b698d118--


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From: "Mankamana Mishra (mankamis)" <mankamis@cisco.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Thread-Topic: WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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From nobody Wed Dec 16 12:18:32 2020
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 16 Dec 2020 12:17:55 -0800
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To: Benjamin Kaduk <kaduk@mit.edu>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Benjamin Kaduk's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Hi Ben,
thank you for the review, and your detailed comments and direct questions.
Please find my answers and proposed updates in-lined below under the GIM>>
tag.
Attached, please find, the diff highlighting the updates and the new
working version of the draft.

Regards,
Greg

On Mon, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker <
noreply@ietf.org> wrote:

> Benjamin Kaduk has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: Discuss
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
> Let's talk about what the requirements are for consistency across PEs in
> the algorithm for selecting the Primary Upstream PE.  Section 4 notes
> that "all the PEs of that MVPN [are required] to follow the same UMH
> selection procedure", but leaves the option of non-revertive behavior as
> something that "MAY also be supported by an implementation", without
> requirement for consistency across all PEs.  It seems to me that if some
> PEs use non-revertive behavior and others do not, then they will
> disagree as to which PE is the Primary (or active) PE in some cases,
> which seems to conflict with the initial guidance that all PEs needed to
> pick the same one.  Is it perhaps that the PEs need to agree on which PE
> is to be advertised as Primary but not necessarily to actually be using
> that one for traffic?  Or am I missing something?
>
GIM>> Thank you for pointing out this inconsistency. I agree that the text
needs some tightening. Below is the proposed update:
OLD TEXT:
   Such behavior is referred to as
   "revertive" behavior and MUST be supported.  Non-revertive behavior
   refers to the behavior of continuing to select the backup PE as the
   UMH even after the Primary has come up.  This non-revertive behavior
   MAY also be supported by an implementation and would be enabled
   through some configuration.
NEW TEXT:
Such behavior is referred to as
   "revertive" behavior and MUST be supported.  Non-revertive behavior
   refers to the behavior of continuing to select the backup PE as the
   UMH even after the Primary has come up.  This non-revertive behavior
   MAY also be supported by an implementation and would be enabled
   through some configuration.  Selection of the behavior, revertive or
   non-revertive, is an operational issue, but it MUST be consistent on
   all PEs in the given MVPN.

>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Section 1
>
>    Section 3 describes local procedures allowing an egress PE (a PE
>    connected to a receiver site) to take into account the status of
>    P-tunnels to determine the Upstream Multicast Hop (UMH) for a given
>    (C-S, C-G).  [...]
>
> Does it also apply to (C-*, C-G)?  (I'll just mention it once, but the
> handling seems to be somewhat inconsistent throughout the document, with
> (C-*,C-G) getting mentioned sometimes but not always, and no pattern
> obvious to me for when it is or is not included.  I think I see some
> instances where (C-*, C-G) does not make sense, so it would probably not
> be a universal replacement.)
>
GIM>> Yes, it cannot be used interchangeably. We've followed the notation
as defined in the last paragraph of Section 3.1 RFC 6513:
   ... C-group address would be a group address in a
   VPN's address space.  A C-tree is a multicast distribution tree
   constructed and maintained by the PIM C-instances.  A C-flow is a
   stream of multicast packets with a common C-source address and a
   common C-group address.  We will use the notation "(C-S,C-G)" to
   identify specific C-flows.  If a particular C-tree is a shared tree
   (whether unidirectional or bidirectional) rather than a source-
   specific tree, we will sometimes speak of the entire set of flows
   traveling that tree, identifying the set as "(C-*,C-G)".
It is my understanding, that the one reference to (C-*,C-G) in the draft is
in Section 3 bullet B:
          The S-PMSI can be advertised only after the
          Upstream PE receives a C-multicast route for (C-S, C-G)/(C-*,
          C-G) to be carried over the advertised S-PMSI.
The reference is not an introduced text but an informational summary of
Section 5.1 RFC 6513. The text preceding that reference is intended to
clarify its status:
  There are three options specified in Section 5.1 of [RFC6513] for a
   downstream PE to select an Upstream PE.
Would you suggest an additional text?

>
>    Section 5 describes a "hot leaf standby" mechanism that can be used
>    to improve failover time in MVPN.  The approach combines mechanisms
>    defined in Section 3 and Section 4 has similarities with the solution
>    described in [RFC7431] to improve failover times when PIM routing is
>    used in a network given some topology and metric constraints.
>
> nit: grammar issue around "has similarities with" (maybe needs a leading
> "and"?)
>
GIM>> Thank you. Updated to:
NEW TEXT:
   Section 5 describes a "hot leaf standby" mechanism that can be used
   to improve failover time in MVPN.  The approach combines mechanisms
   defined in Section 3 and Section 4, and has similarities with the
   solution described in [RFC7431] to improve failover times when PIM
   routing is used in a network given some topology and metric
   constraints.
>
>
>    VPNs.  An operator would enable these mechanisms using a method
>    discussed in Section 3 in combination with the redundancy provided by
>    a standby PE connected to the source of the multicast flow, and it is
>    assumed that all PEs in the network would support these mechanisms
>    for the procedures to work.  In the case that a BGP implementation
>
> Is it a matter of "the procedure will not work at all unless all PEs in
> the network support it", or "only the PEs that support it will get the
> benefits of it"?  [The next sentence suggests an anwer...]
>
GIM>> The sentence might be too long. Yes, only PEs that support the new
Standby PE community and use any of UMH monitoring methods would converge
faster than PEs that don't support both features. Would the re-wording as
below make the text clear:
NEW TEXT:
   An operator would enable these mechanisms using a method
   discussed in Section 3 combined with the redundancy provided by a
   standby PE connected to the multicast flow source.  PEs that support
   these mechanisms would converge faster and thus provide a more stable
   multicast service.

>
> Section 3
>
>    Section 9.1.1 of [RFC6513] are applicable when using I-PMSI
>    P-tunnels.  That document is a foundation for this document, and its
>    processes all apply here.  Section 9.1.1 mandates the use of specific
>    procedures for sending intra-AS I-PMSI A-D Routes.
>
> (nit) the second "Section 9.1.1" is also referring to RFC 6513, not this
> document, which would be the default interpretation of a bare section
> reference.


> (not-nit) The referenced procedure seems to be about processing, not
> sending, intra-AS I-PMSI A-D routes.  Am I misreading something?
>
GIM>> You are right. The sentence mischaracterizes Section 9.1.1 and has no
informational value. Removed it altogether.

>
> Section 3.1
>
>    Different factors can be considered to determine the "status" of a
>    P-tunnel and are described in the following sub-sections.  The
>    optional procedures described in this section also handle the case
>    the downstream PEs do not all apply the same rules to define what the
>    status of a P-tunnel is (please see Section 6), and some of them will
>    produce a result that may be different for different downstream PEs.
>
> nit: I think it's better to put a word like "where" in "the case the
> downtream PEs".
>
GIM>> I've tried it like the following:
NEW TEXT:
   The
   optional procedures described in this section also handle the case
   when the downstream PEs do not all apply the same rules to define
   what the status of a P-tunnel is (please see Section 6), and some of
   them will produce a result that may be different for different
   downstream PEs.

>
> Section 3.1.3
>
>    corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
>    transitions from Up to Down state, the Upstream PE that is the
>    ingress of the P-tunnel MUST NOT be considered a valid UMH.
>
> (nit?) I'm not sure how much precedent there is for using "valid" in
> this context -- IIUC the previous discussion of this process referred
> only to whether a PE is a candidate for being the UMH.
>
GIM>> I agree, "candidate" is missing here. Proposed update:
NEW TEXT:
   If the P-tunnel
   transitions from Up to Down state, the Upstream PE that is the
   ingress of the P-tunnel MUST NOT be considered as a valid candidate
   UMH.

>
> Section 3.1.5
>
>    When such a procedure is used, in the context where fast restoration
>    mechanisms are used for the P-tunnels, a configurable timer MUST be
>    set on the downstream PE to wait before updating the UMH, to let the
>    P-tunnel restoration mechanism to execute its actions.  An
>    implementation SHOULD use three seconds as the default value for this
>    timer.
>
> How does this interact with the value of the maximum inter-packet time?
> Suppose that I know to expect at least one packet every ten seconds.  Do
> I wait ten seconds after receiving the last packet and then another
> three seconds, before engaging in an UMH change?
>
GIM>> This scenario is similar to the use of an active OAM detecting a
network failure. The role of the timer to trigger an action if a certain
number of packets have not arrived. Since the maximum inter-packet time is
known, a downstream PE has an expectation of receiving a packet within a
time interval large than the maximum inter-packet interval. In practice,
the timer could be set three times the maximum inter-packet interval, so
that it expires if three consecutive packets were not received. In the case
you've described, I think that the timer must be set larger than 10
seconds, probably 30+ seconds. Would you suggest any additional text here?

>
>    In cases where this mechanism is used in conjunction with the method
>    described in Section 5, no prior knowledge of the rate of the
>    multicast streams is required; downstream PEs can compare reception
>    on the two P-tunnels to determine when one of them is down.
>
> This feels a little underspecified; is there a reference or more
> guidance that we could give about turning a stream of received packets
> on one tunnel into a maximum inter-packet time on another tunnel,
> supposedly carrying the same traffic?
>
GIM>> I think that this text refers to 1+1 protection, i.e., Active-Active
P-tunnels. In that scenario, the determination of the P-tunnel's state can
be done by comparing it to the reception state of the other P-tunnel in the
redundancy group. But there might be corner cases, like a significant delay
in one of P-tunnels, that may need consideration before recommending this
method. I don't think that it is in the scope of the document. Would
appending the paragraph with "The detailed specification of this mechanism
is outside the scope of this document" be acceptable?

>
> Section 3.1.6
>
>       *  one octet-long field of TLV's Type value (Section 7.3)
>
>       *  one octet-long field of the length of the Value field in octets
>
>       *  variable length Value field.
>
>       The length of a TLV MUST be multiple of four octets.
>
> I assume this is the total length, not the value in the length field?
>
GIM>> Correct. Would the following update make it clearer?
NEW TEXT:
      Figure 2 presents the Optional TLV format TLV that
      consists of:

      *  Type - a one-octet-long field that characterizes the
         interpretation of the Value field (Section 7.3)

      *  Length - a one-octet-long field equal to the length of the
         Value field in octets

      *  Value - a variable-length field.

      The length of a TLV as a whole MUST be multiple of four octets.

>
>    The BFD Discriminator attribute MUST be considered malformed if its
>    length is not a non-zero multiple of four.  If the attribute
>    considered malformed, the UPDATE message SHALL be handled using the
>    approach of Attribute Discard per [RFC7606].
>
> nit: s/attribute considered/attribute is considered/
>
GIM>> Thank you! Updated text to:
NEW TEXT:
   The BFD Discriminator attribute MUST be considered malformed if its
   length is not a non-zero multiple of four.  If the attribute is
   deemed to be malformed, the UPDATE message SHALL be handled using the
   approach of Attribute Discard per [RFC7606].

>
> Section 3.1.6.1
>
>    o  MUST periodically transmit BFD Control packets over the x-PMSI
>       P-tunnel after the P-tunnel is considered established.  Note that
>       the methods to declare a P-tunnel has been established are outside
>       the scope of this specification.
>
> Is there a good reference for how to choose the period of transmission?
>
GIM>> Not really. There are many factors that an operator should consider
when configuring the frequency of BFD packets on the MultipointHead system.
One of the aspects to keep in mind is that unlike p2p BFD, there's no
interval negotiation phase in p2mp BFD. As a result, a tail has no
influence over the interval at which the head of the p2mp BFD session
transmits BFD Control messages.

>
>    If the tracking of the P-tunnel by using a P2MP BFD session is
>    enabled after the x-PMSI A-D Route has been already advertised, the
>    x-PMSI A-D Route MUST be re-sent with precisely the same attributes
>    as before and the BFD Discriminator attribute included.
>
> Pedantically, it seems like "precisely the same attributes as before"
> is incompatible with adding the BFD Discriminator attribute.  Phrasing
> that discusses "the only change between the previous advertisement and
> the new advertisement" would not suffer from such a potential issue.
> (And similarly for when the BFD Discriminator attribute is to be
> removed, a couple paragraphs later.)
>
GIM>> Great, thank you. Applied in both cases:
NEW TEXT:
   If the tracking of the P-tunnel by using a P2MP BFD session is
   enabled after the x-PMSI A-D Route has been already advertised, the
   x-PMSI A-D Route MUST be re-sent with the only change between the
   previous advertisement and the new advertisement to be the inclusion
   of the BFD Discriminator attribute.
and
   o  x-PMSI A-D Route MUST be re-sent with the only change between the
      previous advertisement and the new advertisement be the exclusion
      of the BFD Discriminator attribute;

>
> Section 3.1.6.2
>
>    o  MUST use the source IP address of the BFD Control packet, the
>       value of the BFD Discriminator field, and the x-PMSI Tunnel
>       Identifier [RFC6514] the BFD Control packet was received to
>       properly demultiplex BFD sessions.
>
> nit: missing word around "the BFD Control packet was received" (maybe
> "received on/in"?).
>
GIM>> "on" seems the better option. Updated accordingly.

>
>    According to [RFC8562], if the downstream PE receives Down or
>    AdminDown in the State field of the BFD Control packet or associated
>    with the BFD session Detection Timer expires, the BFD session is
>
> nit: "the BFD Detection Timer associated with the BFD session expires"
>
GIM>> Thank you for the helpful suggestion. Updated.

>
>    PE, while others are considered as Standby Upstream PEs.  In such a
>    scenario, when the P-tunnel is considered down, the downstream PE MAY
>    initiate a switchover of the traffic from the Primary Upstream PE to
>    the Standby Upstream PE only if the Standby Upstream PE is deemed
>    available.
>
> I'm not sure that we've defined what it means for an Upstream PE to be
> deemed "available', yet.  I guess it's possible that there is not an
> established P-Tunnel between the (selected) Standby Upstream PE and the
> donstream PE, so just using the Up/Down/not-known-to-be-Down status of
> that P-tunnel is not an option...
>
GIM>> The wording is sloppy, agree. I think that the intention was to say
"deemed in the Up state". That can be determined using the p2mp BFD session
with Standby Upstream PE acting as its MultipointHead. The proposed update
is as follows:
NEW TEXT:
   In such a scenario, when the P-tunnel is considered
   down, the downstream PE MAY initiate a switchover of the traffic from
   the Primary Upstream PE to the Standby Upstream PE only if the
   Standby Upstream PE is deemed to be in the Up state.  That MAY be
   determined from the state of a P2MP BFD session with the Standby
   Upstream PE as the MultipointHead.

>
>    If the downstream PE's P-tunnel is already established when the
>    downstream PE receives the new x-PMSI A-D Route with BFD
>    Discriminator attribute, the downstream PE MUST associate the value
>    of BFD Discriminator field with the P-tunnel and follow procedures
>    listed above in this section if and only if the x-PMSI A-D Route was
>    properly processed as per [RFC6514], and the BFD Discriminator
>    attribute was validated.
>
> We did not discuss any validation of the BFD Discriminator attribute in
> =C2=A73.1.6; what procedures would this process entail?
>
GIM>> There's, so far, only one validation condition:

The length of a TLV as a whole MUST be multiple of four octets.


> Section 4
>
>    The procedures described below are limited to the case where the site
>    that contains C-S is connected to two or more PEs, though, to
>    simplify the description, the case of dual-homing is described.  The
>
> I suggest giving at least some considerations to how to choose between
> multiple standby Upstream PEs when there are more than one available.
>
GIM>> I understand your idea but that might be a whole new specification
similar to the selection of UMH from the list of candidates. Perhaps
stating that the selection might use known methods but the specifics are
outside the scope of this document be acceptable? For example (sorry for a
longer quote):
NEW TEXT:
   The procedures described below are limited to the case where the site
   that contains C-S is connected to two or more PEs, though, to
   simplify the description, the case of dual-homing is described.  In
   the case where more than two PEs are connected to the C-s site,
   selection of the Standby PE can be performed using one of the methods
   of selecting a UMH.  Details of the selection are outside the scope
   of this document.  The procedures require all the PEs of that MVPN to
   follow the same UMH selection procedure, as specified in [RFC6513],
   whether the PE selected based on its IP address, hashing algorithm
   described in section 5.1.3 of [RFC6513], or Installed UMH Route.  The
   procedures assume that if a site of a given MVPN that contains C-S is
   dual-homed to two PEs, then all the other sites of that MVPN would
   have two unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with
   its RD.

>
>    procedures require all the PEs of that MVPN to follow the same UMH
>    selection procedure, as specified in [RFC6513], whether the PE
>    selected based on its IP address, hashing algorithm described in
>    section 5.1.3 of [RFC6513], or Installed UMH Route.  The procedures
>
> I assume that how the PEs agree on which procedure is in use does not
> involve something being advertised in-band, and is out of scope for this
> document.  But please say so!
>
GIM>> You are right, that is an operational issue and the management
plane's responsibility.
NEW TEXT:
The procedures require all the PEs of that MVPN to
   follow the same UMH selection procedure, as specified in [RFC6513],
   whether the PE selected based on its IP address, the hashing
   algorithm described in section 5.1.3 of [RFC6513], or Installed UMH
   Route.  The consistency of the UMH selection method used among all
   PEs is expected to be provided by the management plane.

>
>    assume that if a site of a given MVPN that contains C-S is dual-homed
>    to two PEs, then all the other sites of that MVPN would have two
>    unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with its RD.
>
> nit: s/its RD/its own RD/
>
GIM>> Ack

> Also, please confirm that the unicast routes are *to* C-S, vs *from* it.
>
GIM>> Though it might be somewhat counterintuitive, in the context of MVPN
"to" is correct.

>
> Section 4.1
>
>    o  the NLRI is constructed as the C-multicast route with an RT that
>       identifies the Primary Upstream PE, except that the RD is the same
>       as if the C-multicast route was built using the Standby Upstream
>       PE as the UMH (it will carry the RD associated to the unicast VPN
>       route advertised by the Standby Upstream PE for S and a Route
>       Target derived from the Standby Upstream PE's UMH route's VRF RT
>       Import EC);
>
> This part is a bit confusing to me, since the first part says that the
> RT identifies the Primary Upstream PE, but the second part says that the
> RT is derived from the Standy Upstream PE's [stuff].  But I'm happy to
> trust you that the [stuff] makes it correct!
>
GIM>> Thank you for putting your trust in our collective thinking. AFAIK,
it works.

>
> Section 4.2
>
>       when the PE determines (the use of the particular method to detect
>       the failure is outside the scope of this document) that C-S is not
>       reachable through some other PE, the PE SHOULD install VRF PIM
>
> It seems like a forward reference to =C2=A74.3 might be helpful.
>
GIM>> Thank you for your suggestion, the reference is added in the working
version.

>
>    Section 9.3.2 of [RFC6514], describes the procedures of sending a
>    Source-Active A-D Route as a result of receiving the C-multicast
>    route.  These procedures MUST be followed for both the normal and
>    Standby C-multicast routes.
>
> There is no section 9.3.2 in RFC 6514.  There is a 9.2.3 that looks
> perhaps plausible, though the string "Source-Active" does not appear in
> it.
>
GIM>> Great catch, thank you! I believe that the correct section is in RFC
6513, not RFC 6514. The former opens with:
   The issue described in Section 9.3.1 is resolved through the use of
   Source Active A-D routes.  In the remainder this section, we provide
   an example of how this works, along with an informal description of
   the procedures.
Would you agree RFC 6513 makes sense?

>
> Section 4.4.2
>
>    Source AS carried in the C-multicast route.  If the match is found,
>    and the C-multicast route carries the Standby PE BGP Community, then
>    the ASBR MUST perform as follows:
>
> (I assume that there is room for local policy to modify this "MUST",
> e.g., if needed to protect against some form of attack ... perhaps it
> even goes without saying.)
>
GIM>> Indeed. Perhaps the following change makes it more accurate:
NEW TEXT:
   If the match is found,
   and the C-multicast route carries the Standby PE BGP Community, then
   the ASBR implementation that supports this specification MUST be
   configurable to perform as follows:

   o  if the route was received over iBGP and its LOCAL_PREF attribute
      is set to zero, then it MUST be re-advertised in eBGP with a MED
      attribute (MULTI_EXIT_DISC) set to the highest possible value
      (0xffff)

   o  if the route was received over eBGP and its MED attribute set to
      0xffff, then it MUST be re-advertised in iBGP with a LOCAL_PREF
      attribute set to zero

   Other ASBR procedures are applied without modification and, when
   applied, MAY modify the above-listed behavior.

>
> Section 5
>
>    o  Upstream PEs use the "hot standby" optional behavior and thus will
>       forward traffic for a given multicast state as soon as they have
>       whether a (primary) BGP C-multicast route or a Standby BGP
>       C-multicast route for that state (or both)
>
> nit: the grammar is a bit weird here, after "as soon as they have"; I'm
> not confident that I could make an accurate suggestion for a fix.
>
GIM>> Would with a minor update it all reads better:
NEW TEXT:
      Upstream PEs use the "hot standby" optional behavior and thus will
      start forwarding traffic for a given multicast state after they
      have whether a (primary) BGP C-multicast route or a Standby BGP
      C-multicast route for that state (or both)

>
> Section 6
>
> I could almost see the discussion of duplicate packets as being a
> subsection of the security considerations, though I don't mind leaving
> it as-is.
>
GIM>> Thank you for agreeing.

>
> Section 8
>
> We could perhaps make some pro forma note that the BFD Discriminator
> attribute, like all BGP attributes, typically does not benefit from
> cryptographic integrity protection and thus could be spoofed so as to be
> different than what is actually used by the multipoint BFD head.  That
> said, I'm willing to let this fall under the incorporated-by-reference
> BGP security considerations.
>
GIM>> Thank you.

>
> Is it worth noting that operating in "hot" standby mode will increase
> the general level of traffic on the VPN and thus susceptibility to DoS?
>
GIM>> We use hot standby in the control plane only. That would add some BGP
traffic but would not as much as 1+1 protection in the data plane. I think
that the amount of the additional load in the VPN with the "hot standby"
defined in the draft unlikely to make PEs more volnurable to DoS. What do
you think?

>
>    This document uses P2MP BFD, as defined in [RFC8562], which, in turn,
>    is based on [RFC5880].  Security considerations relevant to each
>    protocol are discussed in the respective protocol specifications.  An
>    implementation that supports this specification MUST use a mechanism
>    to control the maximum number of P2MP BFD sessions that can be active
>    at the same time.
>
> What is the objective that this control is designed to achieve?  I can
> "control the maximum number of sessions" by asserting the maximum number
> to be an absurdly large value, but I don't think that would meet the
> spirit of this requirement (it does meet the letter of the requirement).
>
GIM>> Though this recommendation may look as too vague, I think it is
helpful to a developer. I imagine, as we've discussed in regard to the
selection of the interval between BFD Control packets, an operator will
consider the overall load of BFD Control packets across all active BFD
sessions. Do you think that a sentence that connects the number of p2mp BFD
sessions and the rate of BFD Control packets be helpful in this context?

>
>    The methods described in Section 3.1 may produce false-negative state
>    changes that can be the trigger for an unnecessary convergence in the
>    control plane, ultimately negatively impacting the multicast service
>    provided by the VPN.  An operator is expected to consider the network
>    environment and use available controls of the mechanism used to
>    determine the status of a P-tunnel.
>
> We mentioned earlier (e.g., in =C2=A73.1) that similar negative effects c=
an
> occur when resiliency mechanisms at different layers interact; that
> might be worth repeating here.
>
GIM>> One of such references is in Section 3.1.2:
   In many cases, it is not practical to use both protection
   methods at the same time because uncorrelated timers might cause
   unnecessary switchovers and destabilize the network.
Thus we referred to Section 3.1 as the encompassing reference to all
possible scenarios. Would you agree with that?

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Ben,<div>thank you for the review, and=
 your detailed comments and direct questions. Please find my answers and pr=
oposed updates in-lined below under the GIM&gt;&gt; tag.</div><div>Attached=
, please find, the diff highlighting the updates and the new working versio=
n of the draft.</div><div><br></div><div>Regards,</div><div>Greg</div></div=
><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mo=
n, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker &lt;<a href=3D"ma=
ilto:noreply@ietf.org" target=3D"_blank">noreply@ietf.org</a>&gt; wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">Benjamin Kaduk has=
 entered the following ballot position for<br>
draft-ietf-bess-mvpn-fast-failover-13: Discuss<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
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<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
DISCUSS:<br>
----------------------------------------------------------------------<br>
<br>
Let&#39;s talk about what the requirements are for consistency across PEs i=
n<br>
the algorithm for selecting the Primary Upstream PE.=C2=A0 Section 4 notes<=
br>
that &quot;all the PEs of that MVPN [are required] to follow the same UMH<b=
r>
selection procedure&quot;, but leaves the option of non-revertive behavior =
as<br>
something that &quot;MAY also be supported by an implementation&quot;, with=
out<br>
requirement for consistency across all PEs.=C2=A0 It seems to me that if so=
me<br>
PEs use non-revertive behavior and others do not, then they will<br>
disagree as to which PE is the Primary (or active) PE in some cases,<br>
which seems to conflict with the initial guidance that all PEs needed to<br=
>
pick the same one.=C2=A0 Is it perhaps that the PEs need to agree on which =
PE<br>
is to be advertised as Primary but not necessarily to actually be using<br>
that one for traffic?=C2=A0 Or am I missing something?<br></blockquote><div=
>GIM&gt;&gt; Thank you for pointing out this inconsistency. I agree that th=
e text needs some tightening. Below is the proposed update:</div><div>OLD T=
EXT:</div><div>=C2=A0 =C2=A0Such behavior is referred to as</div>=C2=A0 =C2=
=A0&quot;revertive&quot; behavior and MUST be supported.=C2=A0 Non-revertiv=
e behavior<br>=C2=A0 =C2=A0refers to the behavior of continuing to select t=
he backup PE as the<br>=C2=A0 =C2=A0UMH even after the Primary has come up.=
=C2=A0 This non-revertive behavior<br>=C2=A0 =C2=A0MAY also be supported by=
 an implementation and would be enabled<br>=C2=A0 =C2=A0through some config=
uration.</div><div class=3D"gmail_quote">NEW TEXT:</div><div class=3D"gmail=
_quote">Such behavior is referred to as<br>=C2=A0 =C2=A0&quot;revertive&quo=
t; behavior and MUST be supported.=C2=A0 Non-revertive behavior<br>=C2=A0 =
=C2=A0refers to the behavior of continuing to select the backup PE as the<b=
r>=C2=A0 =C2=A0UMH even after the Primary has come up.=C2=A0 This non-rever=
tive behavior<br>=C2=A0 =C2=A0MAY also be supported by an implementation an=
d would be enabled<br>=C2=A0 =C2=A0through some configuration.=C2=A0 Select=
ion of the behavior, revertive or<br>=C2=A0 =C2=A0non-revertive, is an oper=
ational issue, but it MUST be consistent on<br>=C2=A0 =C2=A0all PEs in the =
given MVPN.<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
Section 1<br>
<br>
=C2=A0 =C2=A0Section 3 describes local procedures allowing an egress PE (a =
PE<br>
=C2=A0 =C2=A0connected to a receiver site) to take into account the status =
of<br>
=C2=A0 =C2=A0P-tunnels to determine the Upstream Multicast Hop (UMH) for a =
given<br>
=C2=A0 =C2=A0(C-S, C-G).=C2=A0 [...]<br>
<br>
Does it also apply to (C-*, C-G)?=C2=A0 (I&#39;ll just mention it once, but=
 the<br>
handling seems to be somewhat inconsistent throughout the document, with<br=
>
(C-*,C-G) getting mentioned sometimes but not always, and no pattern<br>
obvious to me for when it is or is not included.=C2=A0 I think I see some<b=
r>
instances where (C-*, C-G) does not make sense, so it would probably not<br=
>
be a universal replacement.)<br></blockquote><div>GIM&gt;&gt; Yes, it canno=
t be used interchangeably. We&#39;ve followed the notation as defined in th=
e last paragraph of Section 3.1 RFC 6513:</div>=C2=A0 =C2=A0... C-group add=
ress would be a group address in a<br>=C2=A0 =C2=A0VPN&#39;s address space.=
=C2=A0 A C-tree is a multicast distribution tree<br>=C2=A0 =C2=A0constructe=
d and maintained by the PIM C-instances.=C2=A0 A C-flow is a<br>=C2=A0 =C2=
=A0stream of multicast packets with a common C-source address and a<br>=C2=
=A0 =C2=A0common C-group address.=C2=A0 We will use the notation &quot;(C-S=
,C-G)&quot; to<br>=C2=A0 =C2=A0identify specific C-flows.=C2=A0 If a partic=
ular C-tree is a shared tree<br>=C2=A0 =C2=A0(whether unidirectional or bid=
irectional) rather than a source-<br>=C2=A0 =C2=A0specific tree, we will so=
metimes speak of the entire set of flows<br><div>=C2=A0 =C2=A0traveling tha=
t tree, identifying the set as &quot;(C-*,C-G)&quot;.=C2=A0</div><div>It is=
 my understanding, that the one reference to (C-*,C-G) in the draft is in S=
ection 3 bullet B:</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 The S-PMSI =
can be advertised only after the<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Upst=
ream PE receives a C-multicast route for (C-S, C-G)/(C-*,<br>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 C-G) to be carried over the advertised S-PMSI.<br></di=
v><div>The reference is not an introduced text but an informational summary=
 of Section 5.1 RFC 6513. The text preceding that reference is intended to =
clarify its status:</div><div>=C2=A0 There are three options specified in S=
ection 5.1 of [RFC6513] for a</div>=C2=A0 =C2=A0downstream PE to select an =
Upstream PE.</div><div class=3D"gmail_quote">Would you suggest an additiona=
l text?<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0Section 5 describes a &quot;hot leaf standby&quot; mechanism t=
hat can be used<br>
=C2=A0 =C2=A0to improve failover time in MVPN.=C2=A0 The approach combines =
mechanisms<br>
=C2=A0 =C2=A0defined in Section 3 and Section 4 has similarities with the s=
olution<br>
=C2=A0 =C2=A0described in [RFC7431] to improve failover times when PIM rout=
ing is<br>
=C2=A0 =C2=A0used in a network given some topology and metric constraints.<=
br>
<br>
nit: grammar issue around &quot;has similarities with&quot; (maybe needs a =
leading<br>
&quot;and&quot;?)<br></blockquote><div>GIM&gt;&gt; Thank you. Updated to:</=
div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0Section 5 describes a &quot;hot l=
eaf standby&quot; mechanism that can be used</div>=C2=A0 =C2=A0to improve f=
ailover time in MVPN.=C2=A0 The approach combines mechanisms<br>=C2=A0 =C2=
=A0defined in Section 3 and Section 4, and has similarities with the<br>=C2=
=A0 =C2=A0solution described in [RFC7431] to improve failover times when PI=
M<br>=C2=A0 =C2=A0routing is used in a network given some topology and metr=
ic<br>=C2=A0 =C2=A0constraints.<blockquote class=3D"gmail_quote" style=3D"m=
argin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left=
:1ex">
<br>
=C2=A0 =C2=A0VPNs.=C2=A0 An operator would enable these mechanisms using a =
method<br>
=C2=A0 =C2=A0discussed in Section 3 in combination with the redundancy prov=
ided by<br>
=C2=A0 =C2=A0a standby PE connected to the source of the multicast flow, an=
d it is<br>
=C2=A0 =C2=A0assumed that all PEs in the network would support these mechan=
isms<br>
=C2=A0 =C2=A0for the procedures to work.=C2=A0 In the case that a BGP imple=
mentation<br>
<br>
Is it a matter of &quot;the procedure will not work at all unless all PEs i=
n<br>
the network support it&quot;, or &quot;only the PEs that support it will ge=
t the<br>
benefits of it&quot;?=C2=A0 [The next sentence suggests an anwer...]<br></b=
lockquote><div>GIM&gt;&gt; The sentence might be too long. Yes, only PEs th=
at support the new Standby PE community and use any of UMH monitoring metho=
ds would converge faster than PEs that don&#39;t support both features. Wou=
ld the re-wording as below make the text clear:</div><div>NEW TEXT:</div>=
=C2=A0 =C2=A0An operator would enable these mechanisms using a method<br>=
=C2=A0 =C2=A0discussed in Section 3 combined with the redundancy provided b=
y a<br>=C2=A0 =C2=A0standby PE connected to the multicast flow source.=C2=
=A0 PEs that support<br>=C2=A0 =C2=A0these mechanisms would converge faster=
 and thus provide a more stable<br><div>=C2=A0 =C2=A0multicast service.=C2=
=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 3<br>
<br>
=C2=A0 =C2=A0Section 9.1.1 of [RFC6513] are applicable when using I-PMSI<br=
>
=C2=A0 =C2=A0P-tunnels.=C2=A0 That document is a foundation for this docume=
nt, and its<br>
=C2=A0 =C2=A0processes all apply here.=C2=A0 Section 9.1.1 mandates the use=
 of specific<br>
=C2=A0 =C2=A0procedures for sending intra-AS I-PMSI A-D Routes.<br>
<br>
(nit) the second &quot;Section 9.1.1&quot; is also referring to RFC 6513, n=
ot this<br>
document, which would be the default interpretation of a bare section<br>
reference.</blockquote><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
(not-nit) The referenced procedure seems to be about processing, not<br>
sending, intra-AS I-PMSI A-D routes.=C2=A0 Am I misreading something?<br></=
blockquote><div>GIM&gt;&gt; You are right. The sentence mischaracterizes Se=
ction 9.1.1 and has no informational value. Removed it altogether.</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 3.1<br>
<br>
=C2=A0 =C2=A0Different factors can be considered to determine the &quot;sta=
tus&quot; of a<br>
=C2=A0 =C2=A0P-tunnel and are described in the following sub-sections.=C2=
=A0 The<br>
=C2=A0 =C2=A0optional procedures described in this section also handle the =
case<br>
=C2=A0 =C2=A0the downstream PEs do not all apply the same rules to define w=
hat the<br>
=C2=A0 =C2=A0status of a P-tunnel is (please see Section 6), and some of th=
em will<br>
=C2=A0 =C2=A0produce a result that may be different for different downstrea=
m PEs.<br>
<br>
nit: I think it&#39;s better to put a word like &quot;where&quot; in &quot;=
the case the<br>
downtream PEs&quot;.<br></blockquote><div>GIM&gt;&gt; I&#39;ve tried it lik=
e the following:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0The<br>=C2=A0 =C2=A0=
optional procedures described in this section also handle the case<br>=C2=
=A0 =C2=A0when the downstream PEs do not all apply the same rules to define=
<br>=C2=A0 =C2=A0what the status of a P-tunnel is (please see Section 6), a=
nd some of<br>=C2=A0 =C2=A0them will produce a result that may be different=
 for different<br><div>=C2=A0 =C2=A0downstream PEs.=C2=A0</div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex">
<br>
Section 3.1.3<br>
<br>
=C2=A0 =C2=A0corresponding P-tunnel MUST be re-evaluated.=C2=A0 If the P-tu=
nnel<br>
=C2=A0 =C2=A0transitions from Up to Down state, the Upstream PE that is the=
<br>
=C2=A0 =C2=A0ingress of the P-tunnel MUST NOT be considered a valid UMH.<br=
>
<br>
(nit?) I&#39;m not sure how much precedent there is for using &quot;valid&q=
uot; in<br>
this context -- IIUC the previous discussion of this process referred<br>
only to whether a PE is a candidate for being the UMH.<br></blockquote><div=
>GIM&gt;&gt; I agree, &quot;candidate&quot; is missing here. Proposed updat=
e:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0If the P-tunnel<br>=C2=A0 =C2=A0tr=
ansitions from Up to Down state, the Upstream PE that is the<br>=C2=A0 =C2=
=A0ingress of the P-tunnel MUST NOT be considered as a valid candidate<br><=
div>=C2=A0 =C2=A0UMH.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-le=
ft:1ex">
<br>
Section 3.1.5<br>
<br>
=C2=A0 =C2=A0When such a procedure is used, in the context where fast resto=
ration<br>
=C2=A0 =C2=A0mechanisms are used for the P-tunnels, a configurable timer MU=
ST be<br>
=C2=A0 =C2=A0set on the downstream PE to wait before updating the UMH, to l=
et the<br>
=C2=A0 =C2=A0P-tunnel restoration mechanism to execute its actions.=C2=A0 A=
n<br>
=C2=A0 =C2=A0implementation SHOULD use three seconds as the default value f=
or this<br>
=C2=A0 =C2=A0timer.<br>
<br>
How does this interact with the value of the maximum inter-packet time?<br>
Suppose that I know to expect at least one packet every ten seconds.=C2=A0 =
Do<br>
I wait ten seconds after receiving the last packet and then another<br>
three seconds, before engaging in an UMH change?<br></blockquote><div>GIM&g=
t;&gt; This scenario is similar to the use of an active OAM detecting a net=
work failure. The role of the timer to trigger an action if a certain numbe=
r of packets have not arrived. Since the maximum inter-packet time is known=
, a downstream PE has an expectation of receiving a packet within a time in=
terval large than the maximum inter-packet interval. In practice, the timer=
 could be set three times the=C2=A0maximum inter-packet interval, so that i=
t expires if three consecutive packets were not received. In the case you&#=
39;ve described, I think that the timer must be set larger than 10 seconds,=
 probably 30+ seconds. Would you suggest any additional text here?</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0In cases where this mechanism is used in conjunction with the =
method<br>
=C2=A0 =C2=A0described in Section 5, no prior knowledge of the rate of the<=
br>
=C2=A0 =C2=A0multicast streams is required; downstream PEs can compare rece=
ption<br>
=C2=A0 =C2=A0on the two P-tunnels to determine when one of them is down.<br=
>
<br>
This feels a little underspecified; is there a reference or more<br>
guidance that we could give about turning a stream of received packets<br>
on one tunnel into a maximum inter-packet time on another tunnel,<br>
supposedly carrying the same traffic?<br></blockquote><div>GIM&gt;&gt; I th=
ink that this text refers to 1+1 protection, i.e., Active-Active P-tunnels.=
 In that scenario, the determination of the P-tunnel&#39;s state can be don=
e by comparing it to the reception state of the other P-tunnel in the redun=
dancy group. But there might be corner cases, like a significant delay in o=
ne of P-tunnels, that may need consideration before recommending this metho=
d. I don&#39;t think that it is in the scope of the document. Would appendi=
ng the paragraph with &quot;The detailed specification of this mechanism is=
 outside the scope of this document&quot; be acceptable?</div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex">
<br>
Section 3.1.6<br>
<br>
=C2=A0 =C2=A0 =C2=A0 *=C2=A0 one octet-long field of TLV&#39;s Type value (=
Section 7.3)<br>
<br>
=C2=A0 =C2=A0 =C2=A0 *=C2=A0 one octet-long field of the length of the Valu=
e field in octets<br>
<br>
=C2=A0 =C2=A0 =C2=A0 *=C2=A0 variable length Value field.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 The length of a TLV MUST be multiple of four octets.<b=
r>
<br>
I assume this is the total length, not the value in the length field?<br></=
blockquote><div>GIM&gt;&gt; Correct. Would the following update make it cle=
arer?</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0 =C2=A0 Figure 2 presents =
the Optional TLV format TLV that<br></div>=C2=A0 =C2=A0 =C2=A0 consists of:=
<br><br>=C2=A0 =C2=A0 =C2=A0 * =C2=A0Type - a one-octet-long field that cha=
racterizes the<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0interpretation of the V=
alue field (Section 7.3)<br><br>=C2=A0 =C2=A0 =C2=A0 * =C2=A0Length - a one=
-octet-long field equal to the length of the<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0Value field in octets<br><br>=C2=A0 =C2=A0 =C2=A0 * =C2=A0Value - a =
variable-length field.<br><br><div>=C2=A0 =C2=A0 =C2=A0 The length of a TLV=
 as a whole MUST be multiple of four octets.=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0The BFD Discriminator attribute MUST be considered malformed i=
f its<br>
=C2=A0 =C2=A0length is not a non-zero multiple of four.=C2=A0 If the attrib=
ute<br>
=C2=A0 =C2=A0considered malformed, the UPDATE message SHALL be handled usin=
g the<br>
=C2=A0 =C2=A0approach of Attribute Discard per [RFC7606].<br>
<br>
nit: s/attribute considered/attribute is considered/<br></blockquote><div>G=
IM&gt;&gt; Thank you! Updated text to:</div><div>NEW TEXT:</div>=C2=A0 =C2=
=A0The BFD Discriminator attribute MUST be considered malformed if its<br>=
=C2=A0 =C2=A0length is not a non-zero multiple of four.=C2=A0 If the attrib=
ute is<br>=C2=A0 =C2=A0deemed to be malformed, the UPDATE message SHALL be =
handled using the<br><div>=C2=A0 =C2=A0approach of Attribute Discard per [R=
FC7606].=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 3.1.6.1<br>
<br>
=C2=A0 =C2=A0o=C2=A0 MUST periodically transmit BFD Control packets over th=
e x-PMSI<br>
=C2=A0 =C2=A0 =C2=A0 P-tunnel after the P-tunnel is considered established.=
=C2=A0 Note that<br>
=C2=A0 =C2=A0 =C2=A0 the methods to declare a P-tunnel has been established=
 are outside<br>
=C2=A0 =C2=A0 =C2=A0 the scope of this specification.<br>
<br>
Is there a good reference for how to choose the period of transmission?<br>=
</blockquote><div>GIM&gt;&gt; Not really. There are many factors that an op=
erator should=C2=A0consider when configuring the frequency of BFD packets o=
n the MultipointHead system. One of the aspects to keep in mind is that unl=
ike p2p BFD, there&#39;s no interval negotiation phase in p2mp BFD. As a re=
sult, a tail has no influence over the interval at which the head of the p2=
mp BFD session transmits BFD Control messages.=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0If the tracking of the P-tunnel by using a P2MP BFD session is=
<br>
=C2=A0 =C2=A0enabled after the x-PMSI A-D Route has been already advertised=
, the<br>
=C2=A0 =C2=A0x-PMSI A-D Route MUST be re-sent with precisely the same attri=
butes<br>
=C2=A0 =C2=A0as before and the BFD Discriminator attribute included.<br>
<br>
Pedantically, it seems like &quot;precisely the same attributes as before&q=
uot;<br>
is incompatible with adding the BFD Discriminator attribute.=C2=A0 Phrasing=
<br>
that discusses &quot;the only change between the previous advertisement and=
<br>
the new advertisement&quot; would not suffer from such a potential issue.<b=
r>
(And similarly for when the BFD Discriminator attribute is to be<br>
removed, a couple paragraphs later.)<br></blockquote><div>GIM&gt;&gt; Great=
, thank you. Applied in both cases:</div><div>NEW TEXT:</div><div>=C2=A0 =
=C2=A0If the tracking of the P-tunnel by using a P2MP BFD session is<br>=C2=
=A0 =C2=A0enabled after the x-PMSI A-D Route has been already advertised, t=
he<br>=C2=A0 =C2=A0x-PMSI A-D Route MUST be re-sent with the only change be=
tween the<br>=C2=A0 =C2=A0previous advertisement and the new advertisement =
to be the inclusion<br>=C2=A0 =C2=A0of the BFD Discriminator attribute.<br>=
</div><div>and</div><div>=C2=A0 =C2=A0o =C2=A0x-PMSI A-D Route MUST be re-s=
ent with the only change between the<br>=C2=A0 =C2=A0 =C2=A0 previous adver=
tisement and the new advertisement be the exclusion<br>=C2=A0 =C2=A0 =C2=A0=
 of the BFD Discriminator attribute;<br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">
<br>
Section 3.1.6.2<br>
<br>
=C2=A0 =C2=A0o=C2=A0 MUST use the source IP address of the BFD Control pack=
et, the<br>
=C2=A0 =C2=A0 =C2=A0 value of the BFD Discriminator field, and the x-PMSI T=
unnel<br>
=C2=A0 =C2=A0 =C2=A0 Identifier [RFC6514] the BFD Control packet was receiv=
ed to<br>
=C2=A0 =C2=A0 =C2=A0 properly demultiplex BFD sessions.<br>
<br>
nit: missing word around &quot;the BFD Control packet was received&quot; (m=
aybe<br>
&quot;received on/in&quot;?).<br></blockquote><div>GIM&gt;&gt; &quot;on&quo=
t; seems the better option. Updated accordingly.=C2=A0</div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0According to [RFC8562], if the downstream PE receives Down or<=
br>
=C2=A0 =C2=A0AdminDown in the State field of the BFD Control packet or asso=
ciated<br>
=C2=A0 =C2=A0with the BFD session Detection Timer expires, the BFD session =
is<br>
<br>
nit: &quot;the BFD Detection Timer associated with the BFD session expires&=
quot;<br></blockquote><div>GIM&gt;&gt; Thank you for the helpful suggestion=
. Updated.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0PE, while others are considered as Standby Upstream PEs.=C2=A0=
 In such a<br>
=C2=A0 =C2=A0scenario, when the P-tunnel is considered down, the downstream=
 PE MAY<br>
=C2=A0 =C2=A0initiate a switchover of the traffic from the Primary Upstream=
 PE to<br>
=C2=A0 =C2=A0the Standby Upstream PE only if the Standby Upstream PE is dee=
med<br>
=C2=A0 =C2=A0available.<br>
<br>
I&#39;m not sure that we&#39;ve defined what it means for an Upstream PE to=
 be<br>
deemed &quot;available&#39;, yet.=C2=A0 I guess it&#39;s possible that ther=
e is not an<br>
established P-Tunnel between the (selected) Standby Upstream PE and the<br>
donstream PE, so just using the Up/Down/not-known-to-be-Down status of<br>
that P-tunnel is not an option...<br></blockquote><div>GIM&gt;&gt; The word=
ing is sloppy, agree. I think that the intention was to say &quot;deemed in=
 the Up state&quot;. That can be determined using the p2mp BFD session with=
 Standby Upstream PE acting as its MultipointHead. The proposed update is a=
s follows:</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0In such a scenario, w=
hen the P-tunnel is considered<br>=C2=A0 =C2=A0down, the downstream PE MAY =
initiate a switchover of the traffic from<br>=C2=A0 =C2=A0the Primary Upstr=
eam PE to the Standby Upstream PE only if the<br>=C2=A0 =C2=A0Standby Upstr=
eam PE is deemed to be in the Up state.=C2=A0 That MAY be<br>=C2=A0 =C2=A0d=
etermined from the state of a P2MP BFD session with the Standby<br>=C2=A0 =
=C2=A0Upstream PE as the MultipointHead.<br></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0If the downstream PE&#39;s P-tunnel is already established whe=
n the<br>
=C2=A0 =C2=A0downstream PE receives the new x-PMSI A-D Route with BFD<br>
=C2=A0 =C2=A0Discriminator attribute, the downstream PE MUST associate the =
value<br>
=C2=A0 =C2=A0of BFD Discriminator field with the P-tunnel and follow proced=
ures<br>
=C2=A0 =C2=A0listed above in this section if and only if the x-PMSI A-D Rou=
te was<br>
=C2=A0 =C2=A0properly processed as per [RFC6514], and the BFD Discriminator=
<br>
=C2=A0 =C2=A0attribute was validated.<br>
<br>
We did not discuss any validation of the BFD Discriminator attribute in<br>
=C2=A73.1.6; what procedures would this process entail?<br></blockquote><di=
v>GIM&gt;&gt; There&#39;s, so far, only one validation condition:</div></di=
v><blockquote style=3D"margin:0 0 0 40px;border:none;padding:0px"><div clas=
s=3D"gmail_quote"><div>The length of a TLV as a whole MUST be multiple of f=
our octets.=C2=A0</div></div></blockquote><div class=3D"gmail_quote"><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 4<br>
<br>
=C2=A0 =C2=A0The procedures described below are limited to the case where t=
he site<br>
=C2=A0 =C2=A0that contains C-S is connected to two or more PEs, though, to<=
br>
=C2=A0 =C2=A0simplify the description, the case of dual-homing is described=
.=C2=A0 The<br>
<br>
I suggest giving at least some considerations to how to choose between<br>
multiple standby Upstream PEs when there are more than one available.<br></=
blockquote><div>GIM&gt;&gt; I understand your idea but that might be a whol=
e new specification similar to the selection of UMH from the list of candid=
ates. Perhaps stating that the selection might use known methods but the sp=
ecifics are outside the scope of this document be acceptable? For example (=
sorry for a longer quote):</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0The p=
rocedures described below are limited to the case where the site<br>=C2=A0 =
=C2=A0that contains C-S is connected to two or more PEs, though, to<br>=C2=
=A0 =C2=A0simplify the description, the case of dual-homing is described.=
=C2=A0 In<br>=C2=A0 =C2=A0the case where more than two PEs are connected to=
 the C-s site,<br>=C2=A0 =C2=A0selection of the Standby PE can be performed=
 using one of the methods<br>=C2=A0 =C2=A0of selecting a UMH.=C2=A0 Details=
 of the selection are outside the scope<br>=C2=A0 =C2=A0of this document.=
=C2=A0 The procedures require all the PEs of that MVPN to<br>=C2=A0 =C2=A0f=
ollow the same UMH selection procedure, as specified in [RFC6513],<br>=C2=
=A0 =C2=A0whether the PE selected based on its IP address, hashing algorith=
m<br>=C2=A0 =C2=A0described in section 5.1.3 of [RFC6513], or Installed UMH=
 Route.=C2=A0 The<br>=C2=A0 =C2=A0procedures assume that if a site of a giv=
en MVPN that contains C-S is<br>=C2=A0 =C2=A0dual-homed to two PEs, then al=
l the other sites of that MVPN would<br>=C2=A0 =C2=A0have two unicast VPN r=
outes (VPN-IPv4 or VPN-IPv6) to C-S, each with<br>=C2=A0 =C2=A0its RD.<br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0procedures require all the PEs of that MVPN to follow the same=
 UMH<br>
=C2=A0 =C2=A0selection procedure, as specified in [RFC6513], whether the PE=
<br>
=C2=A0 =C2=A0selected based on its IP address, hashing algorithm described =
in<br>
=C2=A0 =C2=A0section 5.1.3 of [RFC6513], or Installed UMH Route.=C2=A0 The =
procedures<br>
<br>
I assume that how the PEs agree on which procedure is in use does not<br>
involve something being advertised in-band, and is out of scope for this<br=
>
document.=C2=A0 But please say so!<br></blockquote><div>GIM&gt;&gt; You are=
 right, that is an operational issue and the management plane&#39;s respons=
ibility.=C2=A0</div><div>NEW TEXT:</div><div>The procedures require all the=
 PEs of that MVPN to<br>=C2=A0 =C2=A0follow the same UMH selection procedur=
e, as specified in [RFC6513],<br>=C2=A0 =C2=A0whether the PE selected based=
 on its IP address, the hashing<br>=C2=A0 =C2=A0algorithm described in sect=
ion 5.1.3 of [RFC6513], or Installed UMH<br>=C2=A0 =C2=A0Route.=C2=A0 The c=
onsistency of the UMH selection method used among all<br>=C2=A0 =C2=A0PEs i=
s expected to be provided by the management plane.<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0assume that if a site of a given MVPN that contains C-S is dua=
l-homed<br>
=C2=A0 =C2=A0to two PEs, then all the other sites of that MVPN would have t=
wo<br>
=C2=A0 =C2=A0unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with it=
s RD.<br>
<br>
nit: s/its RD/its own RD/<br></blockquote><div>GIM&gt;&gt; Ack=C2=A0</div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
Also, please confirm that the unicast routes are *to* C-S, vs *from* it.<br=
></blockquote><div>GIM&gt;&gt; Though it might be somewhat counterintuitive=
, in the context of MVPN &quot;to&quot; is correct.</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
Section 4.1<br>
<br>
=C2=A0 =C2=A0o=C2=A0 the NLRI is constructed as the C-multicast route with =
an RT that<br>
=C2=A0 =C2=A0 =C2=A0 identifies the Primary Upstream PE, except that the RD=
 is the same<br>
=C2=A0 =C2=A0 =C2=A0 as if the C-multicast route was built using the Standb=
y Upstream<br>
=C2=A0 =C2=A0 =C2=A0 PE as the UMH (it will carry the RD associated to the =
unicast VPN<br>
=C2=A0 =C2=A0 =C2=A0 route advertised by the Standby Upstream PE for S and =
a Route<br>
=C2=A0 =C2=A0 =C2=A0 Target derived from the Standby Upstream PE&#39;s UMH =
route&#39;s VRF RT<br>
=C2=A0 =C2=A0 =C2=A0 Import EC);<br>
<br>
This part is a bit confusing to me, since the first part says that the<br>
RT identifies the Primary Upstream PE, but the second part says that the<br=
>
RT is derived from the Standy Upstream PE&#39;s [stuff].=C2=A0 But I&#39;m =
happy to<br>
trust you that the [stuff] makes it correct!<br></blockquote><div>GIM&gt;&g=
t; Thank you for putting your trust in our collective thinking. AFAIK, it w=
orks.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 4.2<br>
<br>
=C2=A0 =C2=A0 =C2=A0 when the PE determines (the use of the particular meth=
od to detect<br>
=C2=A0 =C2=A0 =C2=A0 the failure is outside the scope of this document) tha=
t C-S is not<br>
=C2=A0 =C2=A0 =C2=A0 reachable through some other PE, the PE SHOULD install=
 VRF PIM<br>
<br>
It seems like a forward reference to =C2=A74.3 might be helpful.<br></block=
quote><div>GIM&gt;&gt; Thank you for your suggestion, the reference is adde=
d in the working version.=C2=A0</div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex">
<br>
=C2=A0 =C2=A0Section 9.3.2 of [RFC6514], describes the procedures of sendin=
g a<br>
=C2=A0 =C2=A0Source-Active A-D Route as a result of receiving the C-multica=
st<br>
=C2=A0 =C2=A0route.=C2=A0 These procedures MUST be followed for both the no=
rmal and<br>
=C2=A0 =C2=A0Standby C-multicast routes.<br>
<br>
There is no section 9.3.2 in RFC 6514.=C2=A0 There is a 9.2.3 that looks<br=
>
perhaps plausible, though the string &quot;Source-Active&quot; does not app=
ear in<br>
it.<br></blockquote><div>GIM&gt;&gt; Great catch, thank you! I believe that=
 the correct section is in RFC 6513, not RFC 6514. The former opens with:</=
div>=C2=A0 =C2=A0The issue described in Section 9.3.1 is resolved through t=
he use of<br>=C2=A0 =C2=A0Source Active A-D routes.=C2=A0 In the remainder =
this section, we provide<br>=C2=A0 =C2=A0an example of how this works, alon=
g with an informal description of<br><div>=C2=A0 =C2=A0the procedures.</div=
><div>Would you agree RFC 6513 makes sense?=C2=A0</div><blockquote class=3D=
"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(2=
04,204,204);padding-left:1ex">
<br>
Section 4.4.2<br>
<br>
=C2=A0 =C2=A0Source AS carried in the C-multicast route.=C2=A0 If the match=
 is found,<br>
=C2=A0 =C2=A0and the C-multicast route carries the Standby PE BGP Community=
, then<br>
=C2=A0 =C2=A0the ASBR MUST perform as follows:<br>
<br>
(I assume that there is room for local policy to modify this &quot;MUST&quo=
t;,<br>
e.g., if needed to protect against some form of attack ... perhaps it<br>
even goes without saying.)<br></blockquote><div>GIM&gt;&gt; Indeed. Perhaps=
 the following change makes it more accurate:</div><div>NEW TEXT:</div>=C2=
=A0 =C2=A0If the match is found,<br>=C2=A0 =C2=A0and the C-multicast route =
carries the Standby PE BGP Community, then<br>=C2=A0 =C2=A0the ASBR impleme=
ntation that supports this specification MUST be<br>=C2=A0 =C2=A0configurab=
le to perform as follows:<br><br>=C2=A0 =C2=A0o =C2=A0if the route was rece=
ived over iBGP and its LOCAL_PREF attribute<br>=C2=A0 =C2=A0 =C2=A0 is set =
to zero, then it MUST be re-advertised in eBGP with a MED<br>=C2=A0 =C2=A0 =
=C2=A0 attribute (MULTI_EXIT_DISC) set to the highest possible value<br>=C2=
=A0 =C2=A0 =C2=A0 (0xffff)<br><br>=C2=A0 =C2=A0o =C2=A0if the route was rec=
eived over eBGP and its MED attribute set to<br>=C2=A0 =C2=A0 =C2=A0 0xffff=
, then it MUST be re-advertised in iBGP with a LOCAL_PREF<br>=C2=A0 =C2=A0 =
=C2=A0 attribute set to zero<br><br>=C2=A0 =C2=A0Other ASBR procedures are =
applied without modification and, when<br><div>=C2=A0 =C2=A0applied, MAY mo=
dify the above-listed behavior.=C2=A0</div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex">
<br>
Section 5<br>
<br>
=C2=A0 =C2=A0o=C2=A0 Upstream PEs use the &quot;hot standby&quot; optional =
behavior and thus will<br>
=C2=A0 =C2=A0 =C2=A0 forward traffic for a given multicast state as soon as=
 they have<br>
=C2=A0 =C2=A0 =C2=A0 whether a (primary) BGP C-multicast route or a Standby=
 BGP<br>
=C2=A0 =C2=A0 =C2=A0 C-multicast route for that state (or both)<br>
<br>
nit: the grammar is a bit weird here, after &quot;as soon as they have&quot=
;; I&#39;m<br>
not confident that I could make an accurate suggestion for a fix.<br></bloc=
kquote><div>GIM&gt;&gt; Would with a minor update it all reads better:</div=
><div>NEW TEXT:</div>=C2=A0 =C2=A0 =C2=A0 Upstream PEs use the &quot;hot st=
andby&quot; optional behavior and thus will<br>=C2=A0 =C2=A0 =C2=A0 start f=
orwarding traffic for a given multicast state after they<br>=C2=A0 =C2=A0 =
=C2=A0 have whether a (primary) BGP C-multicast route or a Standby BGP<br><=
div>=C2=A0 =C2=A0 =C2=A0 C-multicast route for that state (or both)=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bor=
der-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 6<br>
<br>
I could almost see the discussion of duplicate packets as being a<br>
subsection of the security considerations, though I don&#39;t mind leaving<=
br>
it as-is.<br></blockquote><div>GIM&gt;&gt; Thank you for agreeing.=C2=A0</d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 8<br>
<br>
We could perhaps make some pro forma note that the BFD Discriminator<br>
attribute, like all BGP attributes, typically does not benefit from<br>
cryptographic integrity protection and thus could be spoofed so as to be<br=
>
different than what is actually used by the multipoint BFD head.=C2=A0 That=
<br>
said, I&#39;m willing to let this fall under the incorporated-by-reference<=
br>
BGP security considerations.<br></blockquote><div>GIM&gt;&gt; Thank you.=C2=
=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Is it worth noting that operating in &quot;hot&quot; standby mode will incr=
ease<br>
the general level of traffic on the VPN and thus susceptibility to DoS?<br>=
</blockquote><div>GIM&gt;&gt; We use hot standby in the control plane only.=
 That would add some BGP traffic but would not as much as 1+1 protection in=
 the data plane. I think that the amount of the additional load in the VPN =
with the &quot;hot standby&quot; defined in the draft unlikely to make PEs =
more volnurable to DoS. What do you think?=C2=A0</div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0This document uses P2MP BFD, as defined in [RFC8562], which, i=
n turn,<br>
=C2=A0 =C2=A0is based on [RFC5880].=C2=A0 Security considerations relevant =
to each<br>
=C2=A0 =C2=A0protocol are discussed in the respective protocol specificatio=
ns.=C2=A0 An<br>
=C2=A0 =C2=A0implementation that supports this specification MUST use a mec=
hanism<br>
=C2=A0 =C2=A0to control the maximum number of P2MP BFD sessions that can be=
 active<br>
=C2=A0 =C2=A0at the same time.<br>
<br>
What is the objective that this control is designed to achieve?=C2=A0 I can=
<br>
&quot;control the maximum number of sessions&quot; by asserting the maximum=
 number<br>
to be an absurdly large value, but I don&#39;t think that would meet the<br=
>
spirit of this requirement (it does meet the letter of the requirement).<br=
></blockquote><div>GIM&gt;&gt; Though this recommendation may look as too v=
ague, I think it is helpful to a developer. I imagine, as we&#39;ve discuss=
ed in regard to the selection of the interval between BFD Control packets, =
an operator will consider the overall load of BFD Control packets across al=
l active BFD sessions. Do you think that a sentence that connects the numbe=
r of p2mp BFD sessions and the rate of BFD Control packets be helpful in th=
is context?=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
=C2=A0 =C2=A0The methods described in Section 3.1 may produce false-negativ=
e state<br>
=C2=A0 =C2=A0changes that can be the trigger for an unnecessary convergence=
 in the<br>
=C2=A0 =C2=A0control plane, ultimately negatively impacting the multicast s=
ervice<br>
=C2=A0 =C2=A0provided by the VPN.=C2=A0 An operator is expected to consider=
 the network<br>
=C2=A0 =C2=A0environment and use available controls of the mechanism used t=
o<br>
=C2=A0 =C2=A0determine the status of a P-tunnel.<br>
<br>
We mentioned earlier (e.g., in =C2=A73.1) that similar negative effects can=
<br>
occur when resiliency mechanisms at different layers interact; that<br>
might be worth repeating here.<br></blockquote><div>GIM&gt;&gt; One of such=
 references is in Section 3.1.2:</div>=C2=A0 =C2=A0In many cases, it is not=
 practical to use both protection<br>=C2=A0 =C2=A0methods at the same time =
because uncorrelated timers might cause<br><div>=C2=A0 =C2=A0unnecessary sw=
itchovers and destabilize the network.=C2=A0</div><div>Thus we referred to =
Section 3.1 as the encompassing reference to all possible scenarios. Would =
you agree with that?</div></div></div>

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From nobody Wed Dec 16 13:04:28 2020
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Date: Wed, 16 Dec 2020 16:21:42 -0500
From: Jeffrey Haas <jhaas@pfrc.org>
To: Alvaro Retana <aretana.ietf@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org, bess-chairs@ietf.org, bess@ietf.org, Stephane Litkowski <slitkows.ietf@gmail.com>, bfd-chairs@ietf.org
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Alvaro,

Thanks for drawing our attention to this document.  

On Tue, Dec 15, 2020 at 03:09:54PM -0800, Alvaro Retana via Datatracker wrote:
> Alvaro Retana has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: Discuss
> 
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
> 
> 
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> for more information about IESG DISCUSS and COMMENT positions.
> 
> 
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
> 
> 
> 
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
> 
> (1) This document describes several methods to determine the status of a
> tunnel (in §3), none of which "provide a "fast failover" solution when used
> alone, but can be used together with the mechanism described in Section 4"
> (§1).  §3 also says this:
> 
>    An implementation may support any combination of the methods
>    described in this section and provide a network operator with control
>    to choose which one to use in the particular deployment.
> 
> While §3.1 is clear in the fact that it is not a requirement for all
> downstream PEs to use the same mechanism, there are no guidelines to aid the
> operator to chose which mechanism to use.  Some cases may be obvious (e.g.
> §3.1.3 applies to tunnels of a specific type), but others are not.  I would
> like to see deployment considerations related to the advantages/disadvantages
> that each method may have in specific situations (including their possible
> combination).
> 
> 
> (2) The BFD Discriminator Attribute has a very narrow application in this
> document when compared to the potential other uses given the extensibility
> possibilities related to bootstrapping BFD.  I have serious concerns about
> the attribute being defined in this document, amongst a series of other
> mechanisms.

I have the following comments about the BGP Path Attribute in question:

- BGP Packet space is sometimes at a premium.  The initial 3 octet reserved
  padding should be removed.
- The TLVs having a required length of multiples of 4 similarly are space
  wasting.
- The attribute does not make adequate provision for more than one type of a
  BFD Mode.  This likely limits the general purpose re-use of this attribute
  for other purposes.
- The length handling text is likely not correct:
  "The BFD Discriminator attribute MUST be considered malformed if its
   length is not a non-zero multiple of four."
  The implication is a length of four, which would have no BFD
  Discriminator, should be considered a valid PDU.  Note that the length
  considerations are further compounded by the padding issue for optional
  sub-tlvs in the prior point.

Since a BFD discriminator is 4-octets, I'm curious as to what discussion the
working group may have had with regard to using a BGP Extended Community
instead?  In particular, the BGP Extended Community's Transitive bit might
be useful in many multicast VPN scenarios operating over a single AS to
limit the distribution scope of this Discriminator.

The IANA allocation strategies for the Path Attribute and the Optional
Sub-TLVs seems reasonable.  Note that Experimental code points have proven
to be poorly used in BGP and that their use in the public Internet may
result in unexpected discard of the attribute.


> 
> (2a) The tunnel can be monitored without the new BGP Attribute (assuming
> proper configuration of course).  Why is that option is not even mentioned in
> the document?
> 
> In fact, the document recommends deleting the BFD session if the Attribute is
> not present.  Why is that recommendation in place, and what are the cases when
> it can not be followed?
> 
> 
> (2b) The fact that BFD monitoring can be achieved without the new attribute
> makes me think that the bootstrapping of BFD using BGP would be better served
> in a document produced by the BFD WG.  One of the editors has expressed the
> same opinion [1] [2].  Has a discussion taken place in the BFD WG (or at least
> with the Chairs) about this work?  Why was it not taken up there?
> 
> 
> [1] https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c/
> [2] https://tools.ietf.org/wg/bess/minutes?item=minutes-96-bess.html

I will not speak for Reshad, but I don't recall this issue.  I may simply be
forgetting the e-mail brought to the list, if so.

The meta desire here is that communication of the BFD Discriminator for p2mp
sessions requires protocol help - in this case BGP.  While this could also
be discovered via provisioning, that would limit the flexibility of the
deployment of this feature.

For this specific internet-draft's purpose, dissemination of the
Discriminator is tightly scoped.  The fact that this happens under an
AFI/SAFI that is not expected to hit general purpose Internet routes limits
the blast radius of its use.  However, as you note, Alvaro, there may be
more general purpose desire to use this attribute for.

> (15) §3.1.6: "The BFD Discriminator attribute MUST be considered malformed if
> its length is not a non-zero multiple of four."  Ok, except that the
> specification of the attribute doesn't mention the length (only the length of
> the TLVs).  Please specify the length and any considerations related to the
> Extended Length bit.  Also, given that this is a new attribute, with an
> unspecified potential number of TLVs, and that the length is apparently
> unbounded, all leading to the potential need for extended messages, please
> specify how to handle peers that cannot accommodate more than 4k octet
> messages (rfc8654).

Note: I wouldn't put special requirements here on the Extended Length bit.
That's core RFC 4271 Path Attribute behavior.

Similarly, overflow of Path Attributes is a general BGP consideration and it
is inapropriate to require this document to solve that.


-- Jeff


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Roman Danyliw has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
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for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you to Daniel Migault for the SECDIR review

I support Ben and Alvaro's DISCUSS positions.

One editorial nit from Section 3.1.6:

An implementation that does not recognize
   or is configured not to support this attribute MUST follow procedures
   defined for optional transitive path attributes in Section 5 of
   [RFC4271].

It seems odd to be specifying normative language for implementations that do
not/will not understand this specification.  I appreciate that this MUST is
coming from RFC4271.




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Hi Martin,
thank you for your review and comments. Please find my answers, notes, and
the proposed updates below under the GIM>> tag.

Regards,
Greg

On Tue, Dec 15, 2020 at 12:08 PM Martin Duke via Datatracker <
noreply@ietf.org> wrote:

> Martin Duke has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> - This document should expand acronyms on first use, particularly those in
> the
> Abstract.
>
GIM>> Thank you for pointing to this. The updated Abstract is now as
follows:
    This document defines Multicast Virtual Private Network (VPN)
   extensions and procedures that allow fast failover for upstream
   failures by allowing downstream Provider Edges (PEs) to consider the
   status of Provider-Tunnels (P-tunnels) when selecting the upstream PE
   for a VPN multicast flow.  The fast failover is enabled by using RFC
   8562 Bidirectional Forwarding Detection (BFD) for Multipoint Networks
   and the new BGP Attribute - BFD Discriminator.  Also, the document
   introduces a new BGP Community, Standby PE, extending BGP Multicast
   VPN routing so that a C-multicast route can be advertised toward a
   Standby Upstream PE.
>
>
> - Similarly, a couple of new paragraphs in Section 1 would be a useful boot
> camp for concepts like PEs, P-Multicast, C-Multicast, BFD, RT, etc. I spent
> some time in RFC 6513 and I'm still pretty unclear on these.
>
GIM>>I agree that the document relies heavily on RFCs 6513 and 6514. We've
stressed that in the first paragraph of Section 1:
    It is assumed that the reader is familiar with the workings of
    multicast MPLS/BGP IP VPNs as described in [RFC6513] and [RFC6514].
And in the RtgDir review we also received this comment:

This document is fairly easy to read, but demands a thorough understanding
of
RFCs 6513 and 6514. That is not unreasonable.

Adding text that explains some of the concepts of VPN and MPVN may be
challenging because it might be difficult to determine how much information
is sufficient for a reader and not to overload the document with the quotes
from RFCs 4364, 6513, and 6514 (also BFD-related RFCs 5880 and 8562).

>
> - The last paragraph of S1 describes "protection for multicast services".
> Can
> you elaborate what this is protection from? The latency associated with
> tunnel
> failure?
>
GIM>> Strictly speaking, mechanisms described and defined in the document
expedite the convergence of the MVPN control plane when compared with the
regular convergence time of the BGP-based VPN control plane. That, in turn,
enables a faster switchover in the data plane. As the result, using the
methods described, an operator minimizes the packet loss in the protected
multicast service. Hope that clarifies the context of "protection for
multicast services" in this document.

>
> - In Section 3.1.6, please clarify if the length field of the TLV must be a
> multiple of 4 octets, or the entire TLV (including type and length) should
> be a
> multiple of 4. From context, I suspect the latter is true, but it could
> easily
> be misread otherwise.
>
GIM>> While addressing Ben's comment I've updated that part of the text.
Please let me know if the updated version makes it clearer:
      *  Type - a one-octet-long field that characterizes the
         interpretation of the Value field (Section 7.3)

      *  Length - a one-octet-long field equal to the length of the
         Value field in octets

      *  Value - a variable-length field.

      The length of a TLV as a whole MUST be multiple of four octets.

>
> - Sec 5. I think you should delete the word "whether"
>
GIM>> I agree that it is not used correctly in that sentence and that
removing it seems like the simplest way fixing it. I've updated the text
while addressing another comment. Please let me know if the version below
reads as an improvement:
   o  Upstream PEs use the "hot standby" optional behavior and thus will
      start forwarding traffic for a given multicast state after they
      have a (primary) BGP C-multicast route or a Standby BGP
      C-multicast route for that state (or both)

--000000000000fbf40005b69e846c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Martin,<div>thank you for your review =
and comments. Please find my answers, notes, and the proposed updates below=
 under the GIM&gt;&gt; tag.</div><div><br></div><div>Regards,</div><div>Gre=
g</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail=
_attr">On Tue, Dec 15, 2020 at 12:08 PM Martin Duke via Datatracker &lt;<a =
href=3D"mailto:noreply@ietf.org">noreply@ietf.org</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">Martin Duke has entered th=
e following ballot position for<br>
draft-ietf-bess-mvpn-fast-failover-13: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
- This document should expand acronyms on first use, particularly those in =
the<br>
Abstract.<br></blockquote><div>GIM&gt;&gt; Thank you for pointing to this. =
The updated Abstract is now as follows:</div><div>=C2=A0 =C2=A0 This docume=
nt defines Multicast Virtual Private Network (VPN)</div>=C2=A0 =C2=A0extens=
ions and procedures that allow fast failover for upstream<br>=C2=A0 =C2=A0f=
ailures by allowing downstream Provider Edges (PEs) to consider the<br>=C2=
=A0 =C2=A0status of Provider-Tunnels (P-tunnels) when selecting the upstrea=
m PE<br>=C2=A0 =C2=A0for a VPN multicast flow.=C2=A0 The fast failover is e=
nabled by using RFC<br>=C2=A0 =C2=A08562 Bidirectional Forwarding Detection=
 (BFD) for Multipoint Networks<br>=C2=A0 =C2=A0and the new BGP Attribute - =
BFD Discriminator.=C2=A0 Also, the document<br>=C2=A0 =C2=A0introduces a ne=
w BGP Community, Standby PE, extending BGP Multicast<br>=C2=A0 =C2=A0VPN ro=
uting so that a C-multicast route can be advertised toward a<br>=C2=A0 =C2=
=A0Standby Upstream PE.<blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
- Similarly, a couple of new paragraphs in Section 1 would be a useful boot=
<br>
camp for concepts like PEs, P-Multicast, C-Multicast, BFD, RT, etc. I spent=
<br>
some time in RFC 6513 and I&#39;m still pretty unclear on these.<br></block=
quote><div>GIM&gt;&gt;I agree that the document relies heavily on RFCs 6513=
 and 6514. We&#39;ve stressed that in the first paragraph of Section 1:</di=
v><div>=C2=A0 =C2=A0 It is assumed that the reader is familiar with the wor=
kings of</div>=C2=A0 =C2=A0 multicast MPLS/BGP IP VPNs as described in [RFC=
6513] and [RFC6514].</div><div class=3D"gmail_quote">And in the RtgDir revi=
ew we also received this comment:</div><blockquote style=3D"margin:0 0 0 40=
px;border:none;padding:0px"><div class=3D"gmail_quote">This document is fai=
rly easy to read, but demands a thorough understanding of</div><div class=
=3D"gmail_quote">RFCs 6513 and 6514. That is not unreasonable.</div></block=
quote><div class=3D"gmail_quote">Adding text that explains some of the conc=
epts of VPN and MPVN=C2=A0may be challenging because it might be difficult =
to determine how much information is sufficient for a reader and not to ove=
rload the document with the quotes from RFCs 4364, 6513, and 6514 (also BFD=
-related RFCs 5880 and 8562).<br><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-le=
ft:1ex">
<br>
- The last paragraph of S1 describes &quot;protection for multicast service=
s&quot;. Can<br>
you elaborate what this is protection from? The latency associated with tun=
nel<br>
failure?<br></blockquote><div>GIM&gt;&gt; Strictly speaking, mechanisms des=
cribed and defined in the document expedite the convergence of the MVPN con=
trol plane when compared with the regular convergence time of the BGP-based=
 VPN control plane. That, in turn, enables=C2=A0a faster switchover in the =
data plane. As the result, using the methods described, an operator minimiz=
es the packet loss in the protected multicast service. Hope that clarifies =
the context of &quot;protection for multicast services&quot; in this docume=
nt.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
- In Section 3.1.6, please clarify if the length field of the TLV must be a=
<br>
multiple of 4 octets, or the entire TLV (including type and length) should =
be a<br>
multiple of 4. From context, I suspect the latter is true, but it could eas=
ily<br>
be misread otherwise.<br></blockquote><div>GIM&gt;&gt; While addressing Ben=
&#39;s comment I&#39;ve updated that part of the text. Please let me know i=
f the updated version makes it clearer:</div>=C2=A0 =C2=A0 =C2=A0 * =C2=A0T=
ype - a one-octet-long field that characterizes the<br>=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0interpretation of the Value field (Section 7.3)<br><br>=C2=A0=
 =C2=A0 =C2=A0 * =C2=A0Length - a one-octet-long field equal to the length =
of the<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Value field in octets<br><br>=
=C2=A0 =C2=A0 =C2=A0 * =C2=A0Value - a variable-length field.<br><br><div>=
=C2=A0 =C2=A0 =C2=A0 The length of a TLV as a whole MUST be multiple of fou=
r octets.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
- Sec 5. I think you should delete the word &quot;whether&quot;<br></blockq=
uote><div>GIM&gt;&gt; I agree that it is not used correctly in that sentenc=
e and that removing=C2=A0it seems like the simplest way=C2=A0fixing it. I&#=
39;ve updated the text while addressing another comment. Please let me know=
 if the version below reads as an improvement:</div><div>=C2=A0 =C2=A0o =C2=
=A0Upstream PEs use the &quot;hot standby&quot; optional behavior and thus =
will<br>=C2=A0 =C2=A0 =C2=A0 start forwarding traffic for a given multicast=
 state after they<br>=C2=A0 =C2=A0 =C2=A0 have a (primary) BGP C-multicast =
route or a Standby BGP<br>=C2=A0 =C2=A0 =C2=A0 C-multicast route for that s=
tate (or both)<br></div></div></div>

--000000000000fbf40005b69e846c--


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From: Martin Duke <martin.h.duke@gmail.com>
Date: Wed, 16 Dec 2020 17:03:30 -0800
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To: Greg Mirsky <gregimirsky@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Martin Duke's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Thanks for the replies. They are satisfactory.

On Wed, Dec 16, 2020 at 5:00 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Martin,
> thank you for your review and comments. Please find my answers, notes, and
> the proposed updates below under the GIM>> tag.
>
> Regards,
> Greg
>
> On Tue, Dec 15, 2020 at 12:08 PM Martin Duke via Datatracker <
> noreply@ietf.org> wrote:
>
>> Martin Duke has entered the following ballot position for
>> draft-ietf-bess-mvpn-fast-failover-13: No Objection
>>
>> When responding, please keep the subject line intact and reply to all
>> email addresses included in the To and CC lines. (Feel free to cut this
>> introductory paragraph, however.)
>>
>>
>> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
>> for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here:
>> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>>
>>
>>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>> - This document should expand acronyms on first use, particularly those
>> in the
>> Abstract.
>>
> GIM>> Thank you for pointing to this. The updated Abstract is now as
> follows:
>     This document defines Multicast Virtual Private Network (VPN)
>    extensions and procedures that allow fast failover for upstream
>    failures by allowing downstream Provider Edges (PEs) to consider the
>    status of Provider-Tunnels (P-tunnels) when selecting the upstream PE
>    for a VPN multicast flow.  The fast failover is enabled by using RFC
>    8562 Bidirectional Forwarding Detection (BFD) for Multipoint Networks
>    and the new BGP Attribute - BFD Discriminator.  Also, the document
>    introduces a new BGP Community, Standby PE, extending BGP Multicast
>    VPN routing so that a C-multicast route can be advertised toward a
>    Standby Upstream PE.
>>
>>
>> - Similarly, a couple of new paragraphs in Section 1 would be a useful
>> boot
>> camp for concepts like PEs, P-Multicast, C-Multicast, BFD, RT, etc. I
>> spent
>> some time in RFC 6513 and I'm still pretty unclear on these.
>>
> GIM>>I agree that the document relies heavily on RFCs 6513 and 6514. We've
> stressed that in the first paragraph of Section 1:
>     It is assumed that the reader is familiar with the workings of
>     multicast MPLS/BGP IP VPNs as described in [RFC6513] and [RFC6514].
> And in the RtgDir review we also received this comment:
>
> This document is fairly easy to read, but demands a thorough understanding
> of
> RFCs 6513 and 6514. That is not unreasonable.
>
> Adding text that explains some of the concepts of VPN and MPVN may be
> challenging because it might be difficult to determine how much information
> is sufficient for a reader and not to overload the document with the quotes
> from RFCs 4364, 6513, and 6514 (also BFD-related RFCs 5880 and 8562).
>
>>
>> - The last paragraph of S1 describes "protection for multicast services".
>> Can
>> you elaborate what this is protection from? The latency associated with
>> tunnel
>> failure?
>>
> GIM>> Strictly speaking, mechanisms described and defined in the document
> expedite the convergence of the MVPN control plane when compared with the
> regular convergence time of the BGP-based VPN control plane. That, in turn,
> enables a faster switchover in the data plane. As the result, using the
> methods described, an operator minimizes the packet loss in the protected
> multicast service. Hope that clarifies the context of "protection for
> multicast services" in this document.
>
>>
>> - In Section 3.1.6, please clarify if the length field of the TLV must be
>> a
>> multiple of 4 octets, or the entire TLV (including type and length)
>> should be a
>> multiple of 4. From context, I suspect the latter is true, but it could
>> easily
>> be misread otherwise.
>>
> GIM>> While addressing Ben's comment I've updated that part of the text.
> Please let me know if the updated version makes it clearer:
>       *  Type - a one-octet-long field that characterizes the
>          interpretation of the Value field (Section 7.3)
>
>       *  Length - a one-octet-long field equal to the length of the
>          Value field in octets
>
>       *  Value - a variable-length field.
>
>       The length of a TLV as a whole MUST be multiple of four octets.
>
>>
>> - Sec 5. I think you should delete the word "whether"
>>
> GIM>> I agree that it is not used correctly in that sentence and that
> removing it seems like the simplest way fixing it. I've updated the text
> while addressing another comment. Please let me know if the version below
> reads as an improvement:
>    o  Upstream PEs use the "hot standby" optional behavior and thus will
>       start forwarding traffic for a given multicast state after they
>       have a (primary) BGP C-multicast route or a Standby BGP
>       C-multicast route for that state (or both)
>

--0000000000000b7a8605b69e9051
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Thanks for the replies. They are satisfactory.<br></div><b=
r><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, =
Dec 16, 2020 at 5:00 PM Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail=
.com">gregimirsky@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex"><div dir=3D"ltr"><div dir=3D"ltr">Hi Martin,<div=
>thank you for your review and comments. Please find my answers, notes, and=
 the proposed updates below under the GIM&gt;&gt; tag.</div><div><br></div>=
<div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div=
 dir=3D"ltr" class=3D"gmail_attr">On Tue, Dec 15, 2020 at 12:08 PM Martin D=
uke via Datatracker &lt;<a href=3D"mailto:noreply@ietf.org" target=3D"_blan=
k">noreply@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">Martin Duke has entered the following ballot position fo=
r<br>
draft-ietf-bess-mvpn-fast-failover-13: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
- This document should expand acronyms on first use, particularly those in =
the<br>
Abstract.<br></blockquote><div>GIM&gt;&gt; Thank you for pointing to this. =
The updated Abstract is now as follows:</div><div>=C2=A0 =C2=A0 This docume=
nt defines Multicast Virtual Private Network (VPN)</div>=C2=A0 =C2=A0extens=
ions and procedures that allow fast failover for upstream<br>=C2=A0 =C2=A0f=
ailures by allowing downstream Provider Edges (PEs) to consider the<br>=C2=
=A0 =C2=A0status of Provider-Tunnels (P-tunnels) when selecting the upstrea=
m PE<br>=C2=A0 =C2=A0for a VPN multicast flow.=C2=A0 The fast failover is e=
nabled by using RFC<br>=C2=A0 =C2=A08562 Bidirectional Forwarding Detection=
 (BFD) for Multipoint Networks<br>=C2=A0 =C2=A0and the new BGP Attribute - =
BFD Discriminator.=C2=A0 Also, the document<br>=C2=A0 =C2=A0introduces a ne=
w BGP Community, Standby PE, extending BGP Multicast<br>=C2=A0 =C2=A0VPN ro=
uting so that a C-multicast route can be advertised toward a<br>=C2=A0 =C2=
=A0Standby Upstream PE.<blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
- Similarly, a couple of new paragraphs in Section 1 would be a useful boot=
<br>
camp for concepts like PEs, P-Multicast, C-Multicast, BFD, RT, etc. I spent=
<br>
some time in RFC 6513 and I&#39;m still pretty unclear on these.<br></block=
quote><div>GIM&gt;&gt;I agree that the document relies heavily on RFCs 6513=
 and 6514. We&#39;ve stressed that in the first paragraph of Section 1:</di=
v><div>=C2=A0 =C2=A0 It is assumed that the reader is familiar with the wor=
kings of</div>=C2=A0 =C2=A0 multicast MPLS/BGP IP VPNs as described in [RFC=
6513] and [RFC6514].</div><div class=3D"gmail_quote">And in the RtgDir revi=
ew we also received this comment:</div><blockquote style=3D"margin:0px 0px =
0px 40px;border:medium none;padding:0px"><div class=3D"gmail_quote">This do=
cument is fairly easy to read, but demands a thorough understanding of</div=
><div class=3D"gmail_quote">RFCs 6513 and 6514. That is not unreasonable.</=
div></blockquote><div class=3D"gmail_quote">Adding text that explains some =
of the concepts of VPN and MPVN=C2=A0may be challenging because it might be=
 difficult to determine how much information is sufficient for a reader and=
 not to overload the document with the quotes from RFCs 4364, 6513, and 651=
4 (also BFD-related RFCs 5880 and 8562).<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">
<br>
- The last paragraph of S1 describes &quot;protection for multicast service=
s&quot;. Can<br>
you elaborate what this is protection from? The latency associated with tun=
nel<br>
failure?<br></blockquote><div>GIM&gt;&gt; Strictly speaking, mechanisms des=
cribed and defined in the document expedite the convergence of the MVPN con=
trol plane when compared with the regular convergence time of the BGP-based=
 VPN control plane. That, in turn, enables=C2=A0a faster switchover in the =
data plane. As the result, using the methods described, an operator minimiz=
es the packet loss in the protected multicast service. Hope that clarifies =
the context of &quot;protection for multicast services&quot; in this docume=
nt.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
- In Section 3.1.6, please clarify if the length field of the TLV must be a=
<br>
multiple of 4 octets, or the entire TLV (including type and length) should =
be a<br>
multiple of 4. From context, I suspect the latter is true, but it could eas=
ily<br>
be misread otherwise.<br></blockquote><div>GIM&gt;&gt; While addressing Ben=
&#39;s comment I&#39;ve updated that part of the text. Please let me know i=
f the updated version makes it clearer:</div>=C2=A0 =C2=A0 =C2=A0 * =C2=A0T=
ype - a one-octet-long field that characterizes the<br>=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0interpretation of the Value field (Section 7.3)<br><br>=C2=A0=
 =C2=A0 =C2=A0 * =C2=A0Length - a one-octet-long field equal to the length =
of the<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Value field in octets<br><br>=
=C2=A0 =C2=A0 =C2=A0 * =C2=A0Value - a variable-length field.<br><br><div>=
=C2=A0 =C2=A0 =C2=A0 The length of a TLV as a whole MUST be multiple of fou=
r octets.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
- Sec 5. I think you should delete the word &quot;whether&quot;<br></blockq=
uote><div>GIM&gt;&gt; I agree that it is not used correctly in that sentenc=
e and that removing=C2=A0it seems like the simplest way=C2=A0fixing it. I&#=
39;ve updated the text while addressing another comment. Please let me know=
 if the version below reads as an improvement:</div><div>=C2=A0 =C2=A0o =C2=
=A0Upstream PEs use the &quot;hot standby&quot; optional behavior and thus =
will<br>=C2=A0 =C2=A0 =C2=A0 start forwarding traffic for a given multicast=
 state after they<br>=C2=A0 =C2=A0 =C2=A0 have a (primary) BGP C-multicast =
route or a Standby BGP<br>=C2=A0 =C2=A0 =C2=A0 C-multicast route for that s=
tate (or both)<br></div></div></div>
</blockquote></div>

--0000000000000b7a8605b69e9051--


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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
CC: "bess-chairs@ietf.org" <bess-chairs@ietf.org>
Thread-Topic: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Date: Thu, 17 Dec 2020 01:49:10 +0000
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Subject: Re: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-bess-mvpn-evpn-aggregation-label-04
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Hi Matthew and Stephane,

I've read this document and support its publication as a standards track RF=
C.

Best regards,
Jie

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of slitkows.ietf@gmail.=
com
Sent: Friday, December 11, 2020 11:53 PM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04

This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Hi Matthew and Stephane,<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I&#8217;ve read this document and supp=
ort its publication as a standards track RFC.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Best regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>slitkows.ietf@gmail.com<br>
<b>Sent:</b> Friday, December 11, 2020 11:53 PM<br>
<b>To:</b> draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.=
org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until the 28<sup>th</sup> Decemb=
er 2020</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
mvpn-evpn-aggregation-label/">https://datatracker.ietf.org/doc/draft-ietf-b=
ess-mvpn-evpn-aggregation-label/</a>
</span></span><span class=3D"apple-converted-space"><span lang=3D"EN-US"><o=
:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
</div>
</div>
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 16 Dec 2020 19:15:13 -0800
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To: Roman Danyliw <rdd@cert.org>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Roman Danyliw's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Hi Roman,
thank you for the review and the comment. Please find the proposed update
below under the GIM>> tag.

Regards,
Greg

On Wed, Dec 16, 2020 at 2:38 PM Roman Danyliw via Datatracker <
noreply@ietf.org> wrote:

> Roman Danyliw has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Thank you to Daniel Migault for the SECDIR review
>
> I support Ben and Alvaro's DISCUSS positions.
>
> One editorial nit from Section 3.1.6:
>
> An implementation that does not recognize
>    or is configured not to support this attribute MUST follow procedures
>    defined for optional transitive path attributes in Section 5 of
>    [RFC4271].
>
> It seems odd to be specifying normative language for implementations that
> do
> not/will not understand this specification.  I appreciate that this MUST is
> coming from RFC4271.
>
GIM>> Indeed, sounds illogical. Would an updated text be acceptable:
   This document defines the format and ways of using a new BGP
   attribute called the "BFD Discriminator".  It is an optional
   transitive BGP attribute.  Thus it is expected that an implementation
   that does not recognize or is configured not to support this
   attribute follows procedures defined for optional transitive path
   attributes in Section 5 of [RFC4271].

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Roman,<div>thank you for the review an=
d the comment. Please find the proposed update below under the GIM&gt;&gt; =
tag.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><div c=
lass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Dec 16, =
2020 at 2:38 PM Roman Danyliw via Datatracker &lt;<a href=3D"mailto:noreply=
@ietf.org">noreply@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">Roman Danyliw has entered the following ballot p=
osition for<br>
draft-ietf-bess-mvpn-fast-failover-13: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
Thank you to Daniel Migault for the SECDIR review<br>
<br>
I support Ben and Alvaro&#39;s DISCUSS positions.<br>
<br>
One editorial nit from Section 3.1.6:<br>
<br>
An implementation that does not recognize<br>
=C2=A0 =C2=A0or is configured not to support this attribute MUST follow pro=
cedures<br>
=C2=A0 =C2=A0defined for optional transitive path attributes in Section 5 o=
f<br>
=C2=A0 =C2=A0[RFC4271].<br>
<br>
It seems odd to be specifying normative language for implementations that d=
o<br>
not/will not understand this specification.=C2=A0 I appreciate that this MU=
ST is<br>
coming from RFC4271.<br></blockquote><div>GIM&gt;&gt; Indeed, sounds illogi=
cal. Would an updated text be acceptable:</div>=C2=A0 =C2=A0This document d=
efines the format and ways of using a new BGP<br>=C2=A0 =C2=A0attribute cal=
led the &quot;BFD Discriminator&quot;.=C2=A0 It is an optional<br>=C2=A0 =
=C2=A0transitive BGP attribute.=C2=A0 Thus it is expected that an implement=
ation<br>=C2=A0 =C2=A0that does not recognize or is configured not to suppo=
rt this<br>=C2=A0 =C2=A0attribute follows procedures defined for optional t=
ransitive path<br><div>=C2=A0 =C2=A0attributes in Section 5 of [RFC4271].=
=C2=A0</div></div></div>

--0000000000001f792e05b6a06704--


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Subject: [bess] Barry Leiba's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Barry Leiba has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
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for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

— Section 1 —

   The procedures described in this document are optional to enable an
   operator to provide protection for multicast services in BGP/MPLS IP
   VPNs.  An operator would enable these mechanisms using a method
   discussed in Section 3 in combination with the redundancy provided by

It’s a very small point, but I think it’s just a little harder to follow than
necessary because of two uses of “enable” with different senses — it’s easy to
read the first in the same sense as the second, “optional to enable” (rather
than “to enable an operator to...”).  I suggest changing the first to “allow”,
and maybe also change it slightly, so: “are optional, and allow an operator
to...”.

— Section 2.2 —
It’s usually not a good idea to have different definitions for things such as
“upstream” and “Upstream”, for one reason because they can’t be distinguished
if they begin a sentence (where they’ll both appear as “Upstream”), and for
another because it’s easy to inadvertently write the wrong one and not catch
it.  I checked, and I don’t see any case of the first in this document (where
“Upstream” appears at the beginning of the second bullet in Section 5 it seems
to be clear because of “downstream” in the other bullets), but you need to be
careful not to introduce that ambiguity during the editing process.  It would
be good for the AD to include an RFC Editor note to that effect, so they are
alerted to this situation and to avoid beginning any sentences with “Upstream”.
 And the authors should be sure to carefully check every instance of the word
during AUTH48 (it would be good for the RFC Editor to include a reminder of
that in the AUTH48 message).




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Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Barry Leiba's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Hi Barry,
thank you for the review, comments, and suggestions. Please find my
answers below tagged by GIM>>.

Regards,
Greg

On Wed, Dec 16, 2020 at 9:20 PM Barry Leiba via Datatracker <
noreply@ietf.org> wrote:

> Barry Leiba has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> =E2=80=94 Section 1 =E2=80=94
>
>    The procedures described in this document are optional to enable an
>    operator to provide protection for multicast services in BGP/MPLS IP
>    VPNs.  An operator would enable these mechanisms using a method
>    discussed in Section 3 in combination with the redundancy provided by
>
> It=E2=80=99s a very small point, but I think it=E2=80=99s just a little h=
arder to follow
> than
> necessary because of two uses of =E2=80=9Cenable=E2=80=9D with different =
senses =E2=80=94 it=E2=80=99s
> easy to
> read the first in the same sense as the second, =E2=80=9Coptional to enab=
le=E2=80=9D
> (rather
> than =E2=80=9Cto enable an operator to...=E2=80=9D).  I suggest changing =
the first to
> =E2=80=9Callow=E2=80=9D,
> and maybe also change it slightly, so: =E2=80=9Care optional, and allow a=
n operator
> to...=E2=80=9D.
>
GIM>> Many thanks for the suggestions. I agree with you and used the second
one to get the text as follows:
   The procedures described in this document are optional and allow an
   operator to provide protection for multicast services in BGP/MPLS IP
   VPNs.
>
>
> =E2=80=94 Section 2.2 =E2=80=94
> It=E2=80=99s usually not a good idea to have different definitions for th=
ings such
> as
> =E2=80=9Cupstream=E2=80=9D and =E2=80=9CUpstream=E2=80=9D, for one reason=
 because they can=E2=80=99t be
> distinguished
> if they begin a sentence (where they=E2=80=99ll both appear as =E2=80=9CU=
pstream=E2=80=9D), and for
> another because it=E2=80=99s easy to inadvertently write the wrong one an=
d not
> catch
> it.  I checked, and I don=E2=80=99t see any case of the first in this doc=
ument
> (where
> =E2=80=9CUpstream=E2=80=9D appears at the beginning of the second bullet =
in Section 5 it
> seems
> to be clear because of =E2=80=9Cdownstream=E2=80=9D in the other bullets)=
, but you need to
> be
> careful not to introduce that ambiguity during the editing process.  It
> would
> be good for the AD to include an RFC Editor note to that effect, so they
> are
> alerted to this situation and to avoid beginning any sentences with
> =E2=80=9CUpstream=E2=80=9D.
>  And the authors should be sure to carefully check every instance of the
> word
> during AUTH48 (it would be good for the RFC Editor to include a reminder =
of
> that in the AUTH48 message).
>
GIM>> Thank you for your thoughtful and forthlooking comment. At some
point, we had that ambiguity in the text. We will keep an eye out to keep
the document consistent.

--00000000000054979905b6a277cd
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Barry,<div>thank you for the review, c=
omments, and suggestions. Please find my answers=C2=A0below tagged by GIM&g=
t;&gt;.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><di=
v class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Dec 1=
6, 2020 at 9:20 PM Barry Leiba via Datatracker &lt;<a href=3D"mailto:norepl=
y@ietf.org">noreply@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex">Barry Leiba has entered the following ballot po=
sition for<br>
draft-ietf-bess-mvpn-fast-failover-13: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
=E2=80=94 Section 1 =E2=80=94<br>
<br>
=C2=A0 =C2=A0The procedures described in this document are optional to enab=
le an<br>
=C2=A0 =C2=A0operator to provide protection for multicast services in BGP/M=
PLS IP<br>
=C2=A0 =C2=A0VPNs.=C2=A0 An operator would enable these mechanisms using a =
method<br>
=C2=A0 =C2=A0discussed in Section 3 in combination with the redundancy prov=
ided by<br>
<br>
It=E2=80=99s a very small point, but I think it=E2=80=99s just a little har=
der to follow than<br>
necessary because of two uses of =E2=80=9Cenable=E2=80=9D with different se=
nses =E2=80=94 it=E2=80=99s easy to<br>
read the first in the same sense as the second, =E2=80=9Coptional to enable=
=E2=80=9D (rather<br>
than =E2=80=9Cto enable an operator to...=E2=80=9D).=C2=A0 I suggest changi=
ng the first to =E2=80=9Callow=E2=80=9D,<br>
and maybe also change it slightly, so: =E2=80=9Care optional, and allow an =
operator<br>
to...=E2=80=9D.<br></blockquote><div>GIM&gt;&gt; Many thanks for the sugges=
tions. I agree with you and used the second one to get the text as follows:=
</div><div>=C2=A0 =C2=A0The procedures described in this document are optio=
nal and allow an</div>=C2=A0 =C2=A0operator to provide protection for multi=
cast services in BGP/MPLS IP<br>=C2=A0 =C2=A0VPNs.<blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex">
<br>
=E2=80=94 Section 2.2 =E2=80=94<br>
It=E2=80=99s usually not a good idea to have different definitions for thin=
gs such as<br>
=E2=80=9Cupstream=E2=80=9D and =E2=80=9CUpstream=E2=80=9D, for one reason b=
ecause they can=E2=80=99t be distinguished<br>
if they begin a sentence (where they=E2=80=99ll both appear as =E2=80=9CUps=
tream=E2=80=9D), and for<br>
another because it=E2=80=99s easy to inadvertently write the wrong one and =
not catch<br>
it.=C2=A0 I checked, and I don=E2=80=99t see any case of the first in this =
document (where<br>
=E2=80=9CUpstream=E2=80=9D appears at the beginning of the second bullet in=
 Section 5 it seems<br>
to be clear because of =E2=80=9Cdownstream=E2=80=9D in the other bullets), =
but you need to be<br>
careful not to introduce that ambiguity during the editing process.=C2=A0 I=
t would<br>
be good for the AD to include an RFC Editor note to that effect, so they ar=
e<br>
alerted to this situation and to avoid beginning any sentences with =E2=80=
=9CUpstream=E2=80=9D.<br>
=C2=A0And the authors should be sure to carefully check every instance of t=
he word<br>
during AUTH48 (it would be good for the RFC Editor to include a reminder of=
<br>
that in the AUTH48 message).<br></blockquote><div>GIM&gt;&gt; Thank you for=
 your thoughtful and forthlooking=C2=A0comment. At some point, we had that =
ambiguity in the text. We will keep an eye out to keep the document=C2=A0co=
nsistent.</div></div></div>

--00000000000054979905b6a277cd--


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Subject: [bess] Murray Kucherawy's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Murray Kucherawy has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

I concur with Barry's point about the definitions in Section 2.2.

I can't quite parse the first sentence of Section 3.1.1.  Maybe this will help:

OLD:

   A condition to consider that the status of a P-tunnel is Up is that
   the root of the tunnel, as determined in the x-PMSI Tunnel attribute,
   is reachable through unicast routing tables.

NEW:

   When determining whether the status of a P-tunnel is Up, a condition
   to consider is whether the root of the tunnel, as determined in the
   x-PMSI Tunnel attribute, is reachable through unicast routing tables.

Section 3.1.2 has a similar concern.

Why is that a SHOULD and not a MUST in Section 3.1.6.1?  Same question about
3.1.6.2, and the ones in 4.2.  Or, if they are correctly SHOULDs, you might
consider giving some guidance to the reader about when one might go about
deviating from the advice given, since SHOULD offers a choice.

I think in Sections 7.2 and 7.3, you don't need "this document" references for
unassigned things.




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Hi!

For some reason the original DISCUSS message didn=E2=80=99t make it into
everyone=E2=80=99s mailbox (including mine), so I=E2=80=99m =E2=80=9Chijack=
ing=E2=80=9D this reply to
resend the comments.

Note that the archive has the messages:
https://mailarchive.ietf.org/arch/msg/iesg/PByc1h2E-xSBnqXUtFTcltutEkQ/

Alvaro.


=3D=3D=3D



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

(1) This document describes several methods to determine the status of a
tunnel (in =C2=A73), none of which "provide a "fast failover" solution when=
 used
alone, but can be used together with the mechanism described in Section 4"
(=C2=A71). =C2=A0=C2=A73 also says this:

=C2=A0 =C2=A0An implementation may support any combination of the methods
=C2=A0 =C2=A0described in this section and provide a network operator with =
control
=C2=A0 =C2=A0to choose which one to use in the particular deployment.

While =C2=A73.1 is clear in the fact that it is not a requirement for all
downstream PEs to use the same mechanism, there are no guidelines to aid th=
e
operator to chose which mechanism to use. =C2=A0Some cases may be obvious (=
e.g.
=C2=A73.1.3 applies to tunnels of a specific type), but others are not. =C2=
=A0I would
like to see deployment considerations related to the advantages/disadvantag=
es
that each method may have in specific situations (including their possible
combination).


(2) The BFD Discriminator Attribute has a very narrow application in this
document when compared to the potential other uses given the extensibility
possibilities related to bootstrapping BFD. =C2=A0I have serious concerns a=
bout
the attribute being defined in this document, amongst a series of other
mechanisms.

(2a) The tunnel can be monitored without the new BGP Attribute (assuming
proper configuration of course). =C2=A0Why is that option is not even menti=
oned in
the document?

In fact, the document recommends deleting the BFD session if the Attribute =
is
not present. =C2=A0Why is that recommendation in place, and what are the ca=
ses when
it can not be followed?


(2b) The fact that BFD monitoring can be achieved without the new attribute
makes me think that the bootstrapping of BFD using BGP would be better serv=
ed
in a document produced by the BFD WG. =C2=A0One of the editors has expresse=
d the
same opinion [1] [2]. =C2=A0Has a discussion taken place in the BFD WG (or =
at least
with the Chairs) about this work? =C2=A0Why was it not taken up there?


[1] https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT=
1c/
[2] https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-96-bess.html


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

(0) I support Ben's DISCUSS.


(1) This document (currently) specifies a new BGP attribute, but I couldn't
find any discussion about it in the idr mailing list. =C2=A0Has idr been gi=
ven the
opportunity to review?


(2) s/is an OPTIONAL procedure/is an optional procedure
This is not a normative statement to require capitalization.


(3) "VRF Route Import BGP attribute" is mentioned twice (=C2=A73 and =C2=A7=
5), but it is
not an attribute; it is an extended community (rfc6514).


(4) =C2=A73.1.1: "similar to BGP next-hop tracking" =C2=A0Is this specified=
 somewhere?
I don't remember seeing a specification for next-hop tracking, but do know
that implementations do it -- in an implementation-specific way. =C2=A0Plea=
se add a
little more text about what is meant/expected.


(5) =C2=A73.1.1: "If BGP next-hop tracking is done...and the root
address...[is]...the same as the next-hop address...then checking...whether
the tunnel root is reachable, will be unnecessary duplication...." =C2=A0I =
guess
this means that the existing next-hop tracking functionality can be used an=
d
that it doesn't have to be function-specific (root vs next-hop). =C2=A0This
paragraph seems to assume a specific implementation -- but again, given tha=
t
next-hop tracking implementations are internal then this paragraph doesn't
make much sense to me.


(6) The "reachability condition" is mentioned in =C2=A73.1.1/=C2=A73.1.3/=
=C2=A73.1.4. =C2=A0Does
this mean that that root tracking (=C2=A73.1.1) should be used with the oth=
er
mechanisms? =C2=A0The specific text says that "the downstream PE can immedi=
ately
update its UMH when the reachability condition changes", giving the impress=
ion
that the combination is possible but not required.

Note that =C2=A74.3 is titled "Reachability Determination", which I hoped w=
ould
shed more light, but all it does is point back to =C2=A73.1.


(7) =C2=A73.1.2: What is the "last-hop link" of the tunnel? =C2=A0Is it the=
 physical
link, or the virtual hop from the previous waypoint?


(8) =C2=A73.1.2 mentions that "careful consideration and coordination" is n=
eeded
when using other mechanisms such as rfc4090 "because uncorrelated timers mi=
ght
cause unnecessary switchovers and destabilize the network." =C2=A0What are =
the
associated timers related to the mechanisms in this section?


(9) =C2=A73.1.3:

=C2=A0 =C2=A0When using this method and if the signaling state for a P2MP T=
E LSP
=C2=A0 =C2=A0is removed (e.g., if the ingress of the P2MP TE LSP sends a Pa=
thTear
=C2=A0 =C2=A0message) or the P2MP TE LSP changes state from Up to Down as
=C2=A0 =C2=A0determined by procedures in [RFC4875], the status of the
=C2=A0 =C2=A0corresponding P-tunnel MUST be re-evaluated. =C2=A0If the P-tu=
nnel
=C2=A0 =C2=A0transitions from Up to Down state, the Upstream PE that is the
=C2=A0 =C2=A0ingress of the P-tunnel MUST NOT be considered a valid UMH.

These two sentences are redundant. =C2=A0It seems to me that they could be
replaced by:

=C2=A0 =C2=A0When using this method and if the signaling state for a P2MP T=
E LSP
=C2=A0 =C2=A0is removed (e.g., if the ingress of the P2MP TE LSP sends a Pa=
thTear
=C2=A0 =C2=A0message) or the P2MP TE LSP changes state from Up to Down as
=C2=A0 =C2=A0determined by procedures in [RFC4875], the Upstream PE that is=
 the
=C2=A0 =C2=A0ingress of the P-tunnel MUST NOT be considered a valid UMH.


(10) =C2=A73.1.4: "An Upstream PE SHOULD be removed from the UMH candidate
list...if...the upstream one-hop branch of the tunnel from P to PE cannot b=
e
built." =C2=A0 When is it ok to not remove the PE? =C2=A0IOW, why is this a=
ction not
required?


(11) [nit] s/mechanism to execute its actions/mechanism execute its actions


(12) =C2=A73.1.5 says that "where this mechanism is used in conjunction wit=
h the
method described in Section 5...downstream PEs can compare reception on the
two P-tunnels to determine when one of them is down", but =C2=A75 says that
"downstream PEs accept traffic from the primary or standby tunnel, based on
the status of the tunnel (based on Section 3)". =C2=A0IOW, =C2=A73.1.5 poin=
ts at =C2=A75 as
providing a way to determine if a tunnel is down, while =C2=A75 points back=
 at =C2=A73
as the way to determine which tunnel to receive from. =C2=A0This pointing b=
ack and
forth is not a total contradiction, but it needs to be clarified.


(13) =C2=A73.1.6: "An implementation that does not recognize or is configur=
ed not
to support this attribute MUST follow procedures defined for optional
transitive path attributes in Section 5 of [RFC4271]."

There cannot be a Normative action specified for a node that "does not
recognize...this attribute" because, by definition, it can't be assumed tha=
t
it is aware of this specification. =C2=A0In this case, it is not necessary =
to say
anything about unrecognized attributes because that is already specified in
rfc4271.

For the "configured not to support this attribute" case, it should be point=
ed
out that the node should operate as if the attribute was unrecognized.

Suggestion>
=C2=A0 =C2=A0An implementation that is configured not to support this attri=
bute MUST
=C2=A0 =C2=A0follow the procedures defined in Section 5 of [RFC4271] as if =
the attribute
=C2=A0 =C2=A0was unrecognized.


(14) [nit] s/BFD Mode field is the one octet long./The BFD Mode field is on=
e
octet long.


(15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be considered malfo=
rmed if
its length is not a non-zero multiple of four." =C2=A0Ok, except that the
specification of the attribute doesn't mention the length (only the length =
of
the TLVs). =C2=A0Please specify the length and any considerations related t=
o the
Extended Length bit. =C2=A0Also, given that this is a new attribute, with a=
n
unspecified potential number of TLVs, and that the length is apparently
unbounded, all leading to the potential need for extended messages, please
specify how to handle peers that cannot accommodate more than 4k octet
messages (rfc8654).


(16) =C2=A73.1.6.1: "MUST set the IP destination address of the inner IP he=
ader to
one of the internal loopback addresses..." =C2=A0 Where do these addresses =
come
from? =C2=A0How does the Upstream PE figure out which one to use? =C2=A0At =
least please
include a reference to where that is explained.


(17) =C2=A73.1.6.1: "MUST use its IP address as the source IP address" =C2=
=A0Which
address? =C2=A0Please be specific.


(18) =C2=A73.1.6.2: If the IP address doesn't map correctly at the downstre=
am PE
(for example, a different local address is used that doesn't correspond to =
the
information in the PMSI attribute), what action should it take? =C2=A0Can t=
he
tunnel still be monitored?


(19) =C2=A73.1.6.2: "SHOULD NOT switch the traffic to the Standby Upstream =
PE"
When is it ok to do it? =C2=A0IOW, why is this action recommended, and not
required.


(20) =C2=A73.1.7: "set the bfd.LocalDiag of the P2MP BFD session to Concate=
nated
Path Down and/or Reverse Concatenated Path Down" =C2=A0 =C2=A0Which one? =
=C2=A0bfd.LocalDiag
carries a single value.


(21) =C2=A73.1.7: "...it is desired for the downstream PEs to switch to a b=
ackup
Upstream PE. =C2=A0To achieve that...it SHOULD set the bfd.LocalDiag..." =
=C2=A0If not
set, then the objective won't be achieved. =C2=A0When is it ok to not set t=
he
bfd.LocalDiag to indicate the concatenated failure?


(22) =C2=A74: "Such behavior is referred to as "revertive" behavior and MUS=
T be
supported." =C2=A0The text around this sentence seems to indicate that the
revertive behavior is the default, is that the intent? =C2=A0Or if the inte=
nt for
it just to be supported (as written)? =C2=A0Please be clear.


(23) =C2=A74.1: "...routes that carry the "Standby PE" BGP Community MUST h=
ave the
LOCAL_PREF attribute set to zero." =C2=A0What should a receiver do if the
LOCAL_PREF is not zero?


(24) =C2=A74.1: In the last paragraph of this section, if I follow correctl=
y, the
text talks about the case where the standby becomes the primary and the
updated advertisement doesn't have the Standby PE community. =C2=A0If that =
is
correct, then s/ presence/absence of the Standby PE BGP Community/ absence =
of
the Standby PE BGP Community

Also, the last sentence says that the "LOCAL_PREF attribute MUST be set to
zero". =C2=A0If the community is not present, how can a receiver enforce th=
is?
What action should it take if the LOCAL_PREF has a different value?


(25) =C2=A74.3: "other mechanisms MAY be used" =C2=A0 s/MAY/may =C2=A0 This=
 is just a
statement of fact.


(26) =C2=A74.4.2: "MUST try to locate" =C2=A0 To try is not an action that =
can be
normatively enforced. =C2=A0 Also, I don't think that using "MUST" here add=
s value
since the normative action is in the next sentence ("MUST perform as
follows"). s/MUST/must


(27) s/"hot root standby" mode is used (Section 4)/"hot root standby" mode =
is
used (Section 5)


(28) =C2=A77.3: s/sub-TLV/TLV/g =C2=A0 The attribute includes TLVs, not sub=
-TLVs.


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Date: Thu, 17 Dec 2020 18:02:15 -0800
From: Benjamin Kaduk <kaduk@mit.edu>
To: Greg Mirsky <gregimirsky@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org, bess-chairs@ietf.org, BESS <bess@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Benjamin Kaduk's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Hi Greg,

Also inline (though there's not much left to say)

On Wed, Dec 16, 2020 at 12:17:55PM -0800, Greg Mirsky wrote:
> Hi Ben,
> thank you for the review, and your detailed comments and direct questions.
> Please find my answers and proposed updates in-lined below under the GIM>>
> tag.
> Attached, please find, the diff highlighting the updates and the new
> working version of the draft.
> 
> Regards,
> Greg
> 
> On Mon, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker <
> noreply@ietf.org> wrote:
> 
> > Benjamin Kaduk has entered the following ballot position for
> > draft-ietf-bess-mvpn-fast-failover-13: Discuss
> >
> > When responding, please keep the subject line intact and reply to all
> > email addresses included in the To and CC lines. (Feel free to cut this
> > introductory paragraph, however.)
> >
> >
> > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> > for more information about IESG DISCUSS and COMMENT positions.
> >
> >
> > The document, along with other ballot positions, can be found here:
> > https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
> >
> >
> >
> > ----------------------------------------------------------------------
> > DISCUSS:
> > ----------------------------------------------------------------------
> >
> > Let's talk about what the requirements are for consistency across PEs in
> > the algorithm for selecting the Primary Upstream PE.  Section 4 notes
> > that "all the PEs of that MVPN [are required] to follow the same UMH
> > selection procedure", but leaves the option of non-revertive behavior as
> > something that "MAY also be supported by an implementation", without
> > requirement for consistency across all PEs.  It seems to me that if some
> > PEs use non-revertive behavior and others do not, then they will
> > disagree as to which PE is the Primary (or active) PE in some cases,
> > which seems to conflict with the initial guidance that all PEs needed to
> > pick the same one.  Is it perhaps that the PEs need to agree on which PE
> > is to be advertised as Primary but not necessarily to actually be using
> > that one for traffic?  Or am I missing something?
> >
> GIM>> Thank you for pointing out this inconsistency. I agree that the text
> needs some tightening. Below is the proposed update:
> OLD TEXT:
>    Such behavior is referred to as
>    "revertive" behavior and MUST be supported.  Non-revertive behavior
>    refers to the behavior of continuing to select the backup PE as the
>    UMH even after the Primary has come up.  This non-revertive behavior
>    MAY also be supported by an implementation and would be enabled
>    through some configuration.
> NEW TEXT:
> Such behavior is referred to as
>    "revertive" behavior and MUST be supported.  Non-revertive behavior
>    refers to the behavior of continuing to select the backup PE as the
>    UMH even after the Primary has come up.  This non-revertive behavior
>    MAY also be supported by an implementation and would be enabled
>    through some configuration.  Selection of the behavior, revertive or
>    non-revertive, is an operational issue, but it MUST be consistent on
>    all PEs in the given MVPN.

Looks good; I'm glad this was just a simple change.

> >
> >
> > ----------------------------------------------------------------------
> > COMMENT:
> > ----------------------------------------------------------------------
> >
> > Section 1
> >
> >    Section 3 describes local procedures allowing an egress PE (a PE
> >    connected to a receiver site) to take into account the status of
> >    P-tunnels to determine the Upstream Multicast Hop (UMH) for a given
> >    (C-S, C-G).  [...]
> >
> > Does it also apply to (C-*, C-G)?  (I'll just mention it once, but the
> > handling seems to be somewhat inconsistent throughout the document, with
> > (C-*,C-G) getting mentioned sometimes but not always, and no pattern
> > obvious to me for when it is or is not included.  I think I see some
> > instances where (C-*, C-G) does not make sense, so it would probably not
> > be a universal replacement.)
> >
> GIM>> Yes, it cannot be used interchangeably. We've followed the notation
> as defined in the last paragraph of Section 3.1 RFC 6513:
>    ... C-group address would be a group address in a
>    VPN's address space.  A C-tree is a multicast distribution tree
>    constructed and maintained by the PIM C-instances.  A C-flow is a
>    stream of multicast packets with a common C-source address and a
>    common C-group address.  We will use the notation "(C-S,C-G)" to
>    identify specific C-flows.  If a particular C-tree is a shared tree
>    (whether unidirectional or bidirectional) rather than a source-
>    specific tree, we will sometimes speak of the entire set of flows
>    traveling that tree, identifying the set as "(C-*,C-G)".
> It is my understanding, that the one reference to (C-*,C-G) in the draft is
> in Section 3 bullet B:
>           The S-PMSI can be advertised only after the
>           Upstream PE receives a C-multicast route for (C-S, C-G)/(C-*,
>           C-G) to be carried over the advertised S-PMSI.
> The reference is not an introduced text but an informational summary of
> Section 5.1 RFC 6513. The text preceding that reference is intended to
> clarify its status:
>   There are three options specified in Section 5.1 of [RFC6513] for a
>    downstream PE to select an Upstream PE.
> Would you suggest an additional text?

I don't see a need for additional text.  Thanks for walking me through it
-- I'm pretty sure I had lost track of the fact that the §3 (and only)
occurrence of "(C-*, C-G)" was in a part that was supposed to be
summarizing RFC 6513 by the time I stumbled upon it.  With the extra
context it all seems clear.

> >
> >    Section 5 describes a "hot leaf standby" mechanism that can be used
> >    to improve failover time in MVPN.  The approach combines mechanisms
> >    defined in Section 3 and Section 4 has similarities with the solution
> >    described in [RFC7431] to improve failover times when PIM routing is
> >    used in a network given some topology and metric constraints.
> >
> > nit: grammar issue around "has similarities with" (maybe needs a leading
> > "and"?)
> >
> GIM>> Thank you. Updated to:
> NEW TEXT:
>    Section 5 describes a "hot leaf standby" mechanism that can be used
>    to improve failover time in MVPN.  The approach combines mechanisms
>    defined in Section 3 and Section 4, and has similarities with the
>    solution described in [RFC7431] to improve failover times when PIM
>    routing is used in a network given some topology and metric
>    constraints.
> >
> >
> >    VPNs.  An operator would enable these mechanisms using a method
> >    discussed in Section 3 in combination with the redundancy provided by
> >    a standby PE connected to the source of the multicast flow, and it is
> >    assumed that all PEs in the network would support these mechanisms
> >    for the procedures to work.  In the case that a BGP implementation
> >
> > Is it a matter of "the procedure will not work at all unless all PEs in
> > the network support it", or "only the PEs that support it will get the
> > benefits of it"?  [The next sentence suggests an anwer...]
> >
> GIM>> The sentence might be too long. Yes, only PEs that support the new
> Standby PE community and use any of UMH monitoring methods would converge
> faster than PEs that don't support both features. Would the re-wording as
> below make the text clear:
> NEW TEXT:
>    An operator would enable these mechanisms using a method
>    discussed in Section 3 combined with the redundancy provided by a
>    standby PE connected to the multicast flow source.  PEs that support
>    these mechanisms would converge faster and thus provide a more stable
>    multicast service.

Yes, that looks pretty crisp -- thanks!

> >
> > Section 3
> >
> >    Section 9.1.1 of [RFC6513] are applicable when using I-PMSI
> >    P-tunnels.  That document is a foundation for this document, and its
> >    processes all apply here.  Section 9.1.1 mandates the use of specific
> >    procedures for sending intra-AS I-PMSI A-D Routes.
> >
> > (nit) the second "Section 9.1.1" is also referring to RFC 6513, not this
> > document, which would be the default interpretation of a bare section
> > reference.
> 
> 
> > (not-nit) The referenced procedure seems to be about processing, not
> > sending, intra-AS I-PMSI A-D routes.  Am I misreading something?
> >
> GIM>> You are right. The sentence mischaracterizes Section 9.1.1 and has no
> informational value. Removed it altogether.
> 
> >
> > Section 3.1
> >
> >    Different factors can be considered to determine the "status" of a
> >    P-tunnel and are described in the following sub-sections.  The
> >    optional procedures described in this section also handle the case
> >    the downstream PEs do not all apply the same rules to define what the
> >    status of a P-tunnel is (please see Section 6), and some of them will
> >    produce a result that may be different for different downstream PEs.
> >
> > nit: I think it's better to put a word like "where" in "the case the
> > downtream PEs".
> >
> GIM>> I've tried it like the following:
> NEW TEXT:
>    The
>    optional procedures described in this section also handle the case
>    when the downstream PEs do not all apply the same rules to define
>    what the status of a P-tunnel is (please see Section 6), and some of
>    them will produce a result that may be different for different
>    downstream PEs.
> 
> >
> > Section 3.1.3
> >
> >    corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
> >    transitions from Up to Down state, the Upstream PE that is the
> >    ingress of the P-tunnel MUST NOT be considered a valid UMH.
> >
> > (nit?) I'm not sure how much precedent there is for using "valid" in
> > this context -- IIUC the previous discussion of this process referred
> > only to whether a PE is a candidate for being the UMH.
> >
> GIM>> I agree, "candidate" is missing here. Proposed update:
> NEW TEXT:
>    If the P-tunnel
>    transitions from Up to Down state, the Upstream PE that is the
>    ingress of the P-tunnel MUST NOT be considered as a valid candidate
>    UMH.
> 
> >
> > Section 3.1.5
> >
> >    When such a procedure is used, in the context where fast restoration
> >    mechanisms are used for the P-tunnels, a configurable timer MUST be
> >    set on the downstream PE to wait before updating the UMH, to let the
> >    P-tunnel restoration mechanism to execute its actions.  An
> >    implementation SHOULD use three seconds as the default value for this
> >    timer.
> >
> > How does this interact with the value of the maximum inter-packet time?
> > Suppose that I know to expect at least one packet every ten seconds.  Do
> > I wait ten seconds after receiving the last packet and then another
> > three seconds, before engaging in an UMH change?
> >
> GIM>> This scenario is similar to the use of an active OAM detecting a
> network failure. The role of the timer to trigger an action if a certain
> number of packets have not arrived. Since the maximum inter-packet time is
> known, a downstream PE has an expectation of receiving a packet within a
> time interval large than the maximum inter-packet interval. In practice,
> the timer could be set three times the maximum inter-packet interval, so
> that it expires if three consecutive packets were not received. In the case
> you've described, I think that the timer must be set larger than 10
> seconds, probably 30+ seconds. Would you suggest any additional text here?

I think my uncertainty here is whether the 3 seconds default is intended to
be the only waiting period or an additional waiting period after
determining that the tunnel is "probably down" but before updating the UMH.
(Looking at it again now, the latter is a bit of a strained
interpretation.)  That said, your description here suggests that the
operative mechanism is to determine that the tunnel is probably down by
passing a threshold number of packets that were expected but did not
arrive, with some accomodation for jitter in the network if packets are
supposed to be arriving very quickly so that "just wait for 3 missed
packets" isn't long enough to account for (e.g.) interrupt handling on a
forwarder.  So the intended sentiment seems to be something like
"Determining that a tunnel is probably down by waiting for enough packets
to fail to arrive as expected is a heuristic and operational matter that
depends on the maximum inter-packet time.  A timeout of three seconds is a
generally suitable default waiting period to ascertain that the tunnel is
down, though other values would be needed for atypical conditions."

I would not complain if you kept the original text, though.

> >
> >    In cases where this mechanism is used in conjunction with the method
> >    described in Section 5, no prior knowledge of the rate of the
> >    multicast streams is required; downstream PEs can compare reception
> >    on the two P-tunnels to determine when one of them is down.
> >
> > This feels a little underspecified; is there a reference or more
> > guidance that we could give about turning a stream of received packets
> > on one tunnel into a maximum inter-packet time on another tunnel,
> > supposedly carrying the same traffic?
> >
> GIM>> I think that this text refers to 1+1 protection, i.e., Active-Active
> P-tunnels. In that scenario, the determination of the P-tunnel's state can
> be done by comparing it to the reception state of the other P-tunnel in the
> redundancy group. But there might be corner cases, like a significant delay
> in one of P-tunnels, that may need consideration before recommending this
> method. I don't think that it is in the scope of the document. Would
> appending the paragraph with "The detailed specification of this mechanism
> is outside the scope of this document" be acceptable?

I think my confusion stems from the first paragraph of the section seeming
to emphasize the dependence on the "maximum inter-packet time", but the
best algorithm to use in the 1+1 case seems likely to be different (i.e.,
one that makes use of the full knowledge of the incoming packet
distribution).  So my suggestion would be something more along the lines of
"no prior knowledge of the rate or maximum inter-packet time on the
multicast streams is required; downstream PEs can compare actual packet
reception statistics on the two P-tunnels to determine when one of them is
down".  (Adding a "details are out of scope of the document" to that would
be fine, of course.)

> >
> > Section 3.1.6
> >
> >       *  one octet-long field of TLV's Type value (Section 7.3)
> >
> >       *  one octet-long field of the length of the Value field in octets
> >
> >       *  variable length Value field.
> >
> >       The length of a TLV MUST be multiple of four octets.
> >
> > I assume this is the total length, not the value in the length field?
> >
> GIM>> Correct. Would the following update make it clearer?
> NEW TEXT:
>       Figure 2 presents the Optional TLV format TLV that
>       consists of:
> 
>       *  Type - a one-octet-long field that characterizes the
>          interpretation of the Value field (Section 7.3)
> 
>       *  Length - a one-octet-long field equal to the length of the
>          Value field in octets
> 
>       *  Value - a variable-length field.
> 
>       The length of a TLV as a whole MUST be multiple of four octets.

Yes, that's more clear.  (But given Jeff and Alvaro's comments maybe the
whole thing will change anyway.)

> >
> >    The BFD Discriminator attribute MUST be considered malformed if its
> >    length is not a non-zero multiple of four.  If the attribute
> >    considered malformed, the UPDATE message SHALL be handled using the
> >    approach of Attribute Discard per [RFC7606].
> >
> > nit: s/attribute considered/attribute is considered/
> >
> GIM>> Thank you! Updated text to:
> NEW TEXT:
>    The BFD Discriminator attribute MUST be considered malformed if its
>    length is not a non-zero multiple of four.  If the attribute is
>    deemed to be malformed, the UPDATE message SHALL be handled using the
>    approach of Attribute Discard per [RFC7606].
> 
> >
> > Section 3.1.6.1
> >
> >    o  MUST periodically transmit BFD Control packets over the x-PMSI
> >       P-tunnel after the P-tunnel is considered established.  Note that
> >       the methods to declare a P-tunnel has been established are outside
> >       the scope of this specification.
> >
> > Is there a good reference for how to choose the period of transmission?
> >
> GIM>> Not really. There are many factors that an operator should consider
> when configuring the frequency of BFD packets on the MultipointHead system.
> One of the aspects to keep in mind is that unlike p2p BFD, there's no
> interval negotiation phase in p2mp BFD. As a result, a tail has no
> influence over the interval at which the head of the p2mp BFD session
> transmits BFD Control messages.

Okay.  (Yes, I do remember there was a fair bit of contention in the
reviews of the multipoint BFD document relating to the transmission
frequency and the potential to overload the network in the absence of
feedback ... luckily that was a case where I was able to sit back and
watch, and not have to be taking a position.)

> >
> >    If the tracking of the P-tunnel by using a P2MP BFD session is
> >    enabled after the x-PMSI A-D Route has been already advertised, the
> >    x-PMSI A-D Route MUST be re-sent with precisely the same attributes
> >    as before and the BFD Discriminator attribute included.
> >
> > Pedantically, it seems like "precisely the same attributes as before"
> > is incompatible with adding the BFD Discriminator attribute.  Phrasing
> > that discusses "the only change between the previous advertisement and
> > the new advertisement" would not suffer from such a potential issue.
> > (And similarly for when the BFD Discriminator attribute is to be
> > removed, a couple paragraphs later.)
> >
> GIM>> Great, thank you. Applied in both cases:
> NEW TEXT:
>    If the tracking of the P-tunnel by using a P2MP BFD session is
>    enabled after the x-PMSI A-D Route has been already advertised, the
>    x-PMSI A-D Route MUST be re-sent with the only change between the
>    previous advertisement and the new advertisement to be the inclusion
>    of the BFD Discriminator attribute.
> and
>    o  x-PMSI A-D Route MUST be re-sent with the only change between the
>       previous advertisement and the new advertisement be the exclusion
>       of the BFD Discriminator attribute;
> 
> >
> > Section 3.1.6.2
> >
> >    o  MUST use the source IP address of the BFD Control packet, the
> >       value of the BFD Discriminator field, and the x-PMSI Tunnel
> >       Identifier [RFC6514] the BFD Control packet was received to
> >       properly demultiplex BFD sessions.
> >
> > nit: missing word around "the BFD Control packet was received" (maybe
> > "received on/in"?).
> >
> GIM>> "on" seems the better option. Updated accordingly.
> 
> >
> >    According to [RFC8562], if the downstream PE receives Down or
> >    AdminDown in the State field of the BFD Control packet or associated
> >    with the BFD session Detection Timer expires, the BFD session is
> >
> > nit: "the BFD Detection Timer associated with the BFD session expires"
> >
> GIM>> Thank you for the helpful suggestion. Updated.
> 
> >
> >    PE, while others are considered as Standby Upstream PEs.  In such a
> >    scenario, when the P-tunnel is considered down, the downstream PE MAY
> >    initiate a switchover of the traffic from the Primary Upstream PE to
> >    the Standby Upstream PE only if the Standby Upstream PE is deemed
> >    available.
> >
> > I'm not sure that we've defined what it means for an Upstream PE to be
> > deemed "available', yet.  I guess it's possible that there is not an
> > established P-Tunnel between the (selected) Standby Upstream PE and the
> > donstream PE, so just using the Up/Down/not-known-to-be-Down status of
> > that P-tunnel is not an option...
> >
> GIM>> The wording is sloppy, agree. I think that the intention was to say
> "deemed in the Up state". That can be determined using the p2mp BFD session
> with Standby Upstream PE acting as its MultipointHead. The proposed update
> is as follows:
> NEW TEXT:
>    In such a scenario, when the P-tunnel is considered
>    down, the downstream PE MAY initiate a switchover of the traffic from
>    the Primary Upstream PE to the Standby Upstream PE only if the
>    Standby Upstream PE is deemed to be in the Up state.  That MAY be
>    determined from the state of a P2MP BFD session with the Standby
>    Upstream PE as the MultipointHead.
> 
> >
> >    If the downstream PE's P-tunnel is already established when the
> >    downstream PE receives the new x-PMSI A-D Route with BFD
> >    Discriminator attribute, the downstream PE MUST associate the value
> >    of BFD Discriminator field with the P-tunnel and follow procedures
> >    listed above in this section if and only if the x-PMSI A-D Route was
> >    properly processed as per [RFC6514], and the BFD Discriminator
> >    attribute was validated.
> >
> > We did not discuss any validation of the BFD Discriminator attribute in
> > §3.1.6; what procedures would this process entail?
> >
> GIM>> There's, so far, only one validation condition:
> 
> The length of a TLV as a whole MUST be multiple of four octets.
> 
> 
> > Section 4
> >
> >    The procedures described below are limited to the case where the site
> >    that contains C-S is connected to two or more PEs, though, to
> >    simplify the description, the case of dual-homing is described.  The
> >
> > I suggest giving at least some considerations to how to choose between
> > multiple standby Upstream PEs when there are more than one available.
> >
> GIM>> I understand your idea but that might be a whole new specification
> similar to the selection of UMH from the list of candidates. Perhaps
> stating that the selection might use known methods but the specifics are
> outside the scope of this document be acceptable? For example (sorry for a
> longer quote):
> NEW TEXT:
>    The procedures described below are limited to the case where the site
>    that contains C-S is connected to two or more PEs, though, to
>    simplify the description, the case of dual-homing is described.  In
>    the case where more than two PEs are connected to the C-s site,
>    selection of the Standby PE can be performed using one of the methods
>    of selecting a UMH.  Details of the selection are outside the scope
>    of this document.  The procedures require all the PEs of that MVPN to
>    follow the same UMH selection procedure, as specified in [RFC6513],
>    whether the PE selected based on its IP address, hashing algorithm
>    described in section 5.1.3 of [RFC6513], or Installed UMH Route.  The
>    procedures assume that if a site of a given MVPN that contains C-S is
>    dual-homed to two PEs, then all the other sites of that MVPN would
>    have two unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with
>    its RD.

I can understand that selecting from a list of (more than two) candidates
might end up being complicated; I think your text here is sufficient to
address my concern, by giving some indication of how the extension to the
general case could be performed while acknowledging that it is not fully
specified yet.

> >
> >    procedures require all the PEs of that MVPN to follow the same UMH
> >    selection procedure, as specified in [RFC6513], whether the PE
> >    selected based on its IP address, hashing algorithm described in
> >    section 5.1.3 of [RFC6513], or Installed UMH Route.  The procedures
> >
> > I assume that how the PEs agree on which procedure is in use does not
> > involve something being advertised in-band, and is out of scope for this
> > document.  But please say so!
> >
> GIM>> You are right, that is an operational issue and the management
> plane's responsibility.
> NEW TEXT:
> The procedures require all the PEs of that MVPN to
>    follow the same UMH selection procedure, as specified in [RFC6513],
>    whether the PE selected based on its IP address, the hashing
>    algorithm described in section 5.1.3 of [RFC6513], or Installed UMH
>    Route.  The consistency of the UMH selection method used among all
>    PEs is expected to be provided by the management plane.
> 
> >
> >    assume that if a site of a given MVPN that contains C-S is dual-homed
> >    to two PEs, then all the other sites of that MVPN would have two
> >    unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with its RD.
> >
> > nit: s/its RD/its own RD/
> >
> GIM>> Ack
> 
> > Also, please confirm that the unicast routes are *to* C-S, vs *from* it.
> >
> GIM>> Though it might be somewhat counterintuitive, in the context of MVPN
> "to" is correct.

Thanks.

> >
> > Section 4.1
> >
> >    o  the NLRI is constructed as the C-multicast route with an RT that
> >       identifies the Primary Upstream PE, except that the RD is the same
> >       as if the C-multicast route was built using the Standby Upstream
> >       PE as the UMH (it will carry the RD associated to the unicast VPN
> >       route advertised by the Standby Upstream PE for S and a Route
> >       Target derived from the Standby Upstream PE's UMH route's VRF RT
> >       Import EC);
> >
> > This part is a bit confusing to me, since the first part says that the
> > RT identifies the Primary Upstream PE, but the second part says that the
> > RT is derived from the Standy Upstream PE's [stuff].  But I'm happy to
> > trust you that the [stuff] makes it correct!
> >
> GIM>> Thank you for putting your trust in our collective thinking. AFAIK,
> it works.
> 
> >
> > Section 4.2
> >
> >       when the PE determines (the use of the particular method to detect
> >       the failure is outside the scope of this document) that C-S is not
> >       reachable through some other PE, the PE SHOULD install VRF PIM
> >
> > It seems like a forward reference to §4.3 might be helpful.
> >
> GIM>> Thank you for your suggestion, the reference is added in the working
> version.
> 
> >
> >    Section 9.3.2 of [RFC6514], describes the procedures of sending a
> >    Source-Active A-D Route as a result of receiving the C-multicast
> >    route.  These procedures MUST be followed for both the normal and
> >    Standby C-multicast routes.
> >
> > There is no section 9.3.2 in RFC 6514.  There is a 9.2.3 that looks
> > perhaps plausible, though the string "Source-Active" does not appear in
> > it.
> >
> GIM>> Great catch, thank you! I believe that the correct section is in RFC
> 6513, not RFC 6514. The former opens with:
>    The issue described in Section 9.3.1 is resolved through the use of
>    Source Active A-D routes.  In the remainder this section, we provide
>    an example of how this works, along with an informal description of
>    the procedures.
> Would you agree RFC 6513 makes sense?

That does look to make a lot more sense than 6514 did!

> >
> > Section 4.4.2
> >
> >    Source AS carried in the C-multicast route.  If the match is found,
> >    and the C-multicast route carries the Standby PE BGP Community, then
> >    the ASBR MUST perform as follows:
> >
> > (I assume that there is room for local policy to modify this "MUST",
> > e.g., if needed to protect against some form of attack ... perhaps it
> > even goes without saying.)
> >
> GIM>> Indeed. Perhaps the following change makes it more accurate:
> NEW TEXT:
>    If the match is found,
>    and the C-multicast route carries the Standby PE BGP Community, then
>    the ASBR implementation that supports this specification MUST be
>    configurable to perform as follows:
> 
>    o  if the route was received over iBGP and its LOCAL_PREF attribute
>       is set to zero, then it MUST be re-advertised in eBGP with a MED
>       attribute (MULTI_EXIT_DISC) set to the highest possible value
>       (0xffff)
> 
>    o  if the route was received over eBGP and its MED attribute set to
>       0xffff, then it MUST be re-advertised in iBGP with a LOCAL_PREF
>       attribute set to zero
> 
>    Other ASBR procedures are applied without modification and, when
>    applied, MAY modify the above-listed behavior.

Works for me :)

> >
> > Section 5
> >
> >    o  Upstream PEs use the "hot standby" optional behavior and thus will
> >       forward traffic for a given multicast state as soon as they have
> >       whether a (primary) BGP C-multicast route or a Standby BGP
> >       C-multicast route for that state (or both)
> >
> > nit: the grammar is a bit weird here, after "as soon as they have"; I'm
> > not confident that I could make an accurate suggestion for a fix.
> >
> GIM>> Would with a minor update it all reads better:
> NEW TEXT:
>       Upstream PEs use the "hot standby" optional behavior and thus will
>       start forwarding traffic for a given multicast state after they
>       have whether a (primary) BGP C-multicast route or a Standby BGP
>       C-multicast route for that state (or both)

I think that "whether" is not needed (though "either" might work in its
stead).

> >
> > Section 6
> >
> > I could almost see the discussion of duplicate packets as being a
> > subsection of the security considerations, though I don't mind leaving
> > it as-is.
> >
> GIM>> Thank you for agreeing.
> 
> >
> > Section 8
> >
> > We could perhaps make some pro forma note that the BFD Discriminator
> > attribute, like all BGP attributes, typically does not benefit from
> > cryptographic integrity protection and thus could be spoofed so as to be
> > different than what is actually used by the multipoint BFD head.  That
> > said, I'm willing to let this fall under the incorporated-by-reference
> > BGP security considerations.
> >
> GIM>> Thank you.
> 
> >
> > Is it worth noting that operating in "hot" standby mode will increase
> > the general level of traffic on the VPN and thus susceptibility to DoS?
> >
> GIM>> We use hot standby in the control plane only. That would add some BGP
> traffic but would not as much as 1+1 protection in the data plane. I think
> that the amount of the additional load in the VPN with the "hot standby"
> defined in the draft unlikely to make PEs more volnurable to DoS. What do
> you think?

I think I was assuming this was "hot" in the data plane as well as the
control plane, when I Wrote the comment.  For just the control plane, your
assessment seems reasonable.

> >
> >    This document uses P2MP BFD, as defined in [RFC8562], which, in turn,
> >    is based on [RFC5880].  Security considerations relevant to each
> >    protocol are discussed in the respective protocol specifications.  An
> >    implementation that supports this specification MUST use a mechanism
> >    to control the maximum number of P2MP BFD sessions that can be active
> >    at the same time.
> >
> > What is the objective that this control is designed to achieve?  I can
> > "control the maximum number of sessions" by asserting the maximum number
> > to be an absurdly large value, but I don't think that would meet the
> > spirit of this requirement (it does meet the letter of the requirement).
> >
> GIM>> Though this recommendation may look as too vague, I think it is
> helpful to a developer. I imagine, as we've discussed in regard to the
> selection of the interval between BFD Control packets, an operator will
> consider the overall load of BFD Control packets across all active BFD
> sessions. Do you think that a sentence that connects the number of p2mp BFD
> sessions and the rate of BFD Control packets be helpful in this context?

Or even another clause, maybe something like "to limit the overall amount
of capacity used by the BFD traffic".  (I think part of what triggered my
comment is that this is "MUST use", not "MUST provide" -- the goal of a
"MUST provide" is fairly obvious but "MUST use" with no specific bound
could be seen as make-work.)

> >
> >    The methods described in Section 3.1 may produce false-negative state
> >    changes that can be the trigger for an unnecessary convergence in the
> >    control plane, ultimately negatively impacting the multicast service
> >    provided by the VPN.  An operator is expected to consider the network
> >    environment and use available controls of the mechanism used to
> >    determine the status of a P-tunnel.
> >
> > We mentioned earlier (e.g., in §3.1) that similar negative effects can
> > occur when resiliency mechanisms at different layers interact; that
> > might be worth repeating here.
> >
> GIM>> One of such references is in Section 3.1.2:
>    In many cases, it is not practical to use both protection
>    methods at the same time because uncorrelated timers might cause
>    unnecessary switchovers and destabilize the network.
> Thus we referred to Section 3.1 as the encompassing reference to all
> possible scenarios. Would you agree with that?

Wow, that looks like a real short-term memory failure on my part (§3.1 was
mentioned just in the previous sentence!).  Sorry for the noise; this is
fine as-is.

Thanks again,

Ben


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Subject: Re: [bess] Murray Kucherawy's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Hi Murray,
thank you for the review, comments, and helpful suggestions. Please find my
answers and notes below tagged by GIM>>.

Regards,
Greg

On Wed, Dec 16, 2020 at 9:48 PM Murray Kucherawy via Datatracker <
noreply@ietf.org> wrote:

> Murray Kucherawy has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> I concur with Barry's point about the definitions in Section 2.2.
>
> I can't quite parse the first sentence of Section 3.1.1.  Maybe this will
> help:
>
> OLD:
>
>    A condition to consider that the status of a P-tunnel is Up is that
>    the root of the tunnel, as determined in the x-PMSI Tunnel attribute,
>    is reachable through unicast routing tables.
>
> NEW:
>
>    When determining whether the status of a P-tunnel is Up, a condition
>    to consider is whether the root of the tunnel, as determined in the
>    x-PMSI Tunnel attribute, is reachable through unicast routing tables.
>
GIM>> Thank you for the suggested text, it is much clearer. I might propose
a small re-wording to get the following:
NEW TEXT:

When determining if the status of a P-tunnel is Up,
a condition to consider is whether the root of the tunnel,
as specified in the x-PMSI Tunnel attribute, is reachable
through unicast routing tables.

What do you think?

>
> Section 3.1.2 has a similar concern.
>
GIM>> I agree and propose the following update:
OLD TEXT:
    A condition to consider a tunnel status as Up can be that the last-
   hop link of the P-tunnel is Up.
NEW TEXT:
   When determining if the status of a P-tunnel is Up, a condition to
   consider is whether the last-hop link of the P-tunnel is Up.

>
> Why is that a SHOULD and not a MUST in Section 3.1.6.1?

GIM>> The thinking, as I recall, was that the operator might re-enable
P-tunnel tracking, and not deleting the p2mp BFD session(s) might make an
implementation to resume tracking faster. Though the gain might be
negligent for a single BFD session, but if the same PE is the root for
multiple multicast trees, such behavior might be useful. But thinking about
that now, we might give the same flexibility and still use MUST. Please
review the following update:
OLD TEXT:
  o  the P2MP BFD session SHOULD be deleted.
NEW TEXT:
   o  the P2MP BFD session MUST be deleted.  The session MAY be deleted
      after some of time.  If an implementation uses a timer to delay
      the cleanup, it MUST allow the configuration of the delay
      interval, and use a reasonable default value.

Same question about
> 3.1.6.2,

GIM>> I think that it was the same reasoning. Would applying the update as
above be helpful?


> and the ones in 4.2.

GIM>> I think these two SHOULDs could have been MAYs but not MUSTs. In
fact, the text that follows uses MAY and then it is used to illustrate what
constitutes "cold root standby", "warm root standby, and "hot root
standby". The latter is the case when both SHOULD are followed.
Do you think that is reasonable?

> Or, if they are correctly SHOULDs, you might
> consider giving some guidance to the reader about when one might go about
> deviating from the advice given, since SHOULD offers a choice.
>
> I think in Sections 7.2 and 7.3, you don't need "this document" references
> for
> unassigned things.
>
GIM>> Thank you, updated per your suggestion.

--00000000000084181c05b6b5f3a2
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Murray,<div>thank you for the review, =
comments, and helpful=C2=A0suggestions. Please find my answers and notes=C2=
=A0below tagged by GIM&gt;&gt;.</div><div><br></div><div>Regards,</div><div=
>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Wed, Dec 16, 2020 at 9:48 PM Murray Kucherawy via Datatracker=
 &lt;<a href=3D"mailto:noreply@ietf.org">noreply@ietf.org</a>&gt; wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">Murray Kucherawy h=
as entered the following ballot position for<br>
draft-ietf-bess-mvpn-fast-failover-13: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
I concur with Barry&#39;s point about the definitions in Section 2.2.<br>
<br>
I can&#39;t quite parse the first sentence of Section 3.1.1.=C2=A0 Maybe th=
is will help:<br>
<br>
OLD:<br>
<br>
=C2=A0 =C2=A0A condition to consider that the status of a P-tunnel is Up is=
 that<br>
=C2=A0 =C2=A0the root of the tunnel, as determined in the x-PMSI Tunnel att=
ribute,<br>
=C2=A0 =C2=A0is reachable through unicast routing tables.<br>
<br>
NEW:<br>
<br>
=C2=A0 =C2=A0When determining whether the status of a P-tunnel is Up, a con=
dition<br>
=C2=A0 =C2=A0to consider is whether the root of the tunnel, as determined i=
n the<br>
=C2=A0 =C2=A0x-PMSI Tunnel attribute, is reachable through unicast routing =
tables.<br></blockquote><div>GIM&gt;&gt; Thank you for the suggested text, =
it is much clearer. I might propose a small re-wording to get the following=
:</div><div>NEW TEXT:</div></div><blockquote style=3D"margin:0 0 0 40px;bor=
der:none;padding:0px"><div class=3D"gmail_quote"><div>When determining if t=
he status of a P-tunnel is Up,</div></div><div class=3D"gmail_quote"><div>a=
 condition to consider is whether the root of the tunnel,</div></div><div c=
lass=3D"gmail_quote"><div>as specified in the x-PMSI Tunnel attribute, is r=
eachable</div></div><div class=3D"gmail_quote"><div>through unicast routing=
 tables.=C2=A0</div></div></blockquote>What do you think?<br><div class=3D"=
gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Section 3.1.2 has a similar concern.<br></blockquote><div>GIM&gt;&gt; I agr=
ee and propose the following update:</div><div>OLD TEXT:</div><div>=C2=A0 =
=C2=A0 A condition to consider a tunnel status as Up can be that the last-<=
/div>=C2=A0 =C2=A0hop link of the P-tunnel is Up.</div><div class=3D"gmail_=
quote">NEW TEXT:</div><div class=3D"gmail_quote">=C2=A0 =C2=A0When determin=
ing if the status of a P-tunnel is Up, a condition to<br>=C2=A0 =C2=A0consi=
der is whether the last-hop link of the P-tunnel is Up.<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex">
<br>
Why is that a SHOULD and not a MUST in Section 3.1.6.1? </blockquote><div>G=
IM&gt;&gt; The thinking, as I recall, was that the operator might re-enable=
 P-tunnel tracking, and not deleting the p2mp BFD session(s) might make an =
implementation to resume tracking faster. Though the gain might=C2=A0be neg=
ligent for a single BFD session, but if the same PE is the root for multipl=
e multicast trees, such behavior might be useful. But thinking about that n=
ow, we might give the same flexibility and still use MUST. Please review th=
e following update:</div><div>OLD TEXT:</div><div>=C2=A0 o =C2=A0the P2MP B=
FD session SHOULD be deleted.<br></div><div>NEW TEXT:</div><div>=C2=A0 =C2=
=A0o =C2=A0the P2MP BFD session MUST be deleted.=C2=A0 The session MAY be d=
eleted<br>=C2=A0 =C2=A0 =C2=A0 after some of time.=C2=A0 If an implementati=
on uses a timer to delay<br>=C2=A0 =C2=A0 =C2=A0 the cleanup, it MUST allow=
 the configuration of the delay<br>=C2=A0 =C2=A0 =C2=A0 interval, and use a=
 reasonable default value.<br></div><div><br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex">Same question about<br>
3.1.6.2, </blockquote><div>GIM&gt;&gt; I think that it was the same reasoni=
ng. Would applying the update as above be helpful?</div><div>=C2=A0</div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex">and the ones in 4.2.=C2=A0 =
</blockquote><div>GIM&gt;&gt; I think these two SHOULDs could have been MAY=
s but not MUSTs. In fact, the text that follows uses MAY and then it is use=
d to illustrate what constitutes=C2=A0&quot;cold root standby&quot;, &quot;=
warm root standby, and &quot;hot root standby&quot;. The latter is the case=
 when both SHOULD are followed.</div><div>Do you think that is reasonable?<=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">Or, if they are corr=
ectly SHOULDs, you might<br>
consider giving some guidance to the reader about when one might go about<b=
r>
deviating from the advice given, since SHOULD offers a choice.<br>
<br>
I think in Sections 7.2 and 7.3, you don&#39;t need &quot;this document&quo=
t; references for<br>
unassigned things.<br></blockquote><div>GIM&gt;&gt; Thank you, updated per =
your suggestion.=C2=A0</div></div></div>

--00000000000084181c05b6b5f3a2--


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From: "Murray S. Kucherawy" <superuser@gmail.com>
Date: Fri, 18 Dec 2020 18:08:49 -0800
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To: Greg Mirsky <gregimirsky@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Murray Kucherawy's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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On Thu, Dec 17, 2020 at 8:57 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

>
> I can't quite parse the first sentence of Section 3.1.1.  Maybe this will
>> help:
>>
>> OLD:
>>
>>    A condition to consider that the status of a P-tunnel is Up is that
>>    the root of the tunnel, as determined in the x-PMSI Tunnel attribute,
>>    is reachable through unicast routing tables.
>>
>> NEW:
>>
>>    When determining whether the status of a P-tunnel is Up, a condition
>>    to consider is whether the root of the tunnel, as determined in the
>>    x-PMSI Tunnel attribute, is reachable through unicast routing tables.
>>
> GIM>> Thank you for the suggested text, it is much clearer. I might
> propose a small re-wording to get the following:
> NEW TEXT:
>
> When determining if the status of a P-tunnel is Up,
> a condition to consider is whether the root of the tunnel,
> as specified in the x-PMSI Tunnel attribute, is reachable
> through unicast routing tables.
>
> What do you think?
>

Yep, that's better.


>> Section 3.1.2 has a similar concern.
>>
> GIM>> I agree and propose the following update:
> OLD TEXT:
>     A condition to consider a tunnel status as Up can be that the last-
>    hop link of the P-tunnel is Up.
> NEW TEXT:
>    When determining if the status of a P-tunnel is Up, a condition to
>    consider is whether the last-hop link of the P-tunnel is Up.
>

Looks good.


>> Why is that a SHOULD and not a MUST in Section 3.1.6.1?
>
> GIM>> The thinking, as I recall, was that the operator might re-enable
> P-tunnel tracking, and not deleting the p2mp BFD session(s) might make an
> implementation to resume tracking faster. Though the gain might be
> negligent for a single BFD session, but if the same PE is the root for
> multiple multicast trees, such behavior might be useful. But thinking about
> that now, we might give the same flexibility and still use MUST. Please
> review the following update:
> OLD TEXT:
>   o  the P2MP BFD session SHOULD be deleted.
> NEW TEXT:
>    o  the P2MP BFD session MUST be deleted.  The session MAY be deleted
>       after some of time.  If an implementation uses a timer to delay
>       the cleanup, it MUST allow the configuration of the delay
>       interval, and use a reasonable default value.
>

Taking my own run at it; either is fine:

o the P2MP BFD session MUST be deleted.  The session MAY be deleted after
some configurable delay, which should have a reasonable default.


> Same question about
>> 3.1.6.2,
>
> GIM>> I think that it was the same reasoning. Would applying the update as
> above be helpful?
>

Sure.


>
>> and the ones in 4.2.
>
> GIM>> I think these two SHOULDs could have been MAYs but not MUSTs. In
> fact, the text that follows uses MAY and then it is used to illustrate what
> constitutes "cold root standby", "warm root standby, and "hot root
> standby". The latter is the case when both SHOULD are followed.
> Do you think that is reasonable?
>

My concern generally is just this:

Or, if they are correctly SHOULDs, you might
>> consider giving some guidance to the reader about when one might go about
>> deviating from the advice given, since SHOULD offers a choice.
>>
>
If you feel that your suggestion resolves that concern, I'm happy.

-MSK

--00000000000052eca405b6c7b572
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Thu, Dec 17, 2020 at 8:57 PM Greg =
Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</=
a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><d=
iv dir=3D"ltr"><br><div class=3D"gmail_quote"><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">
I can&#39;t quite parse the first sentence of Section 3.1.1.=C2=A0 Maybe th=
is will help:<br>
<br>
OLD:<br>
<br>
=C2=A0 =C2=A0A condition to consider that the status of a P-tunnel is Up is=
 that<br>
=C2=A0 =C2=A0the root of the tunnel, as determined in the x-PMSI Tunnel att=
ribute,<br>
=C2=A0 =C2=A0is reachable through unicast routing tables.<br>
<br>
NEW:<br>
<br>
=C2=A0 =C2=A0When determining whether the status of a P-tunnel is Up, a con=
dition<br>
=C2=A0 =C2=A0to consider is whether the root of the tunnel, as determined i=
n the<br>
=C2=A0 =C2=A0x-PMSI Tunnel attribute, is reachable through unicast routing =
tables.<br></blockquote><div>GIM&gt;&gt; Thank you for the suggested text, =
it is much clearer. I might propose a small re-wording to get the following=
:</div><div>NEW TEXT:</div></div><blockquote style=3D"margin:0px 0px 0px 40=
px;border:medium none;padding:0px"><div class=3D"gmail_quote"><div>When det=
ermining if the status of a P-tunnel is Up,</div></div><div class=3D"gmail_=
quote"><div>a condition to consider is whether the root of the tunnel,</div=
></div><div class=3D"gmail_quote"><div>as specified in the x-PMSI Tunnel at=
tribute, is reachable</div></div><div class=3D"gmail_quote"><div>through un=
icast routing tables.=C2=A0</div></div></blockquote>What do you think?<br><=
/div></blockquote><div><br></div><div>Yep, that&#39;s better.</div><div> <b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">=
<div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
">
<br>
Section 3.1.2 has a similar concern.<br></blockquote><div>GIM&gt;&gt; I agr=
ee and propose the following update:</div><div>OLD TEXT:</div><div>=C2=A0 =
=C2=A0 A condition to consider a tunnel status as Up can be that the last-<=
/div>=C2=A0 =C2=A0hop link of the P-tunnel is Up.</div><div class=3D"gmail_=
quote">NEW TEXT:</div><div class=3D"gmail_quote">=C2=A0 =C2=A0When determin=
ing if the status of a P-tunnel is Up, a condition to<br>=C2=A0 =C2=A0consi=
der is whether the last-hop link of the P-tunnel is Up.<br></div></div></bl=
ockquote><div><br></div><div>Looks good.</div><div> <br></div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_q=
uote"><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Why is that a SHOULD and not a MUST in Section 3.1.6.1? </blockquote><div>G=
IM&gt;&gt; The thinking, as I recall, was that the operator might re-enable=
 P-tunnel tracking, and not deleting the p2mp BFD session(s) might make an =
implementation to resume tracking faster. Though the gain might=C2=A0be neg=
ligent for a single BFD session, but if the same PE is the root for multipl=
e multicast trees, such behavior might be useful. But thinking about that n=
ow, we might give the same flexibility and still use MUST. Please review th=
e following update:</div><div>OLD TEXT:</div><div>=C2=A0 o =C2=A0the P2MP B=
FD session SHOULD be deleted.<br></div><div>NEW TEXT:</div><div>=C2=A0 =C2=
=A0o =C2=A0the P2MP BFD session MUST be deleted.=C2=A0 The session MAY be d=
eleted<br>=C2=A0 =C2=A0 =C2=A0 after some of time.=C2=A0 If an implementati=
on uses a timer to delay<br>=C2=A0 =C2=A0 =C2=A0 the cleanup, it MUST allow=
 the configuration of the delay<br>=C2=A0 =C2=A0 =C2=A0 interval, and use a=
 reasonable default value.<br></div></div></div></blockquote><div><br></div=
><div>Taking my own run at it; either is fine:</div><div><br></div><div>o t=
he P2MP BFD session MUST be deleted.=C2=A0 The session MAY be deleted after=
 some configurable delay, which should have a reasonable default.</div><div=
> <br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"l=
tr"><div class=3D"gmail_quote"><div><br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">Same question about<br>
3.1.6.2, </blockquote><div>GIM&gt;&gt; I think that it was the same reasoni=
ng. Would applying the update as above be helpful?</div></div></div></block=
quote><div><br></div><div>Sure.</div><div> <br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_quote"><di=
v>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">and the one=
s in 4.2.=C2=A0 </blockquote><div>GIM&gt;&gt; I think these two SHOULDs cou=
ld have been MAYs but not MUSTs. In fact, the text that follows uses MAY an=
d then it is used to illustrate what constitutes=C2=A0&quot;cold root stand=
by&quot;, &quot;warm root standby, and &quot;hot root standby&quot;. The la=
tter is the case when both SHOULD are followed.</div><div>Do you think that=
 is reasonable?</div></div></div></blockquote><div><br></div><div>My concer=
n generally is just this:<br></div><div> <br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_quote"><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">Or, if they are correctly SHOU=
LDs, you might<br>
consider giving some guidance to the reader about when one might go about<b=
r>
deviating from the advice given, since SHOULD offers a choice.<br></blockqu=
ote></div></div></blockquote><div><br></div><div>If you feel that your sugg=
estion resolves that concern, I&#39;m happy.</div><div><br></div><div>-MSK<=
br></div></div></div>

--00000000000052eca405b6c7b572--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Fri, 18 Dec 2020 18:31:57 -0800
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To: "Murray S. Kucherawy" <superuser@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Murray Kucherawy's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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--00000000000011327405b6c8082c
Content-Type: text/plain; charset="UTF-8"

Hi Murray,
thank you for the suggested text that makes our intention is crystal clear.
I've updated the text and used your text in the second place:
OLD TEXT:
   o  SHOULD delete the P2MP BFD session associated with the P-tunnel;
NEW TEXT:
   o  the P2MP BFD session associated with the P-tunnel MUST be deleted.
      The session MAY be deleted after some configurable delay, which
      should have a reasonable default.

And s/SHOULD/MAY/ in Section 4.2:
   When a PE receives a C-multicast route for a particular (C-S, C-G),
   and the RT carried in the route results in importing the route into a
   particular VRF on the PE, if the route carries the Standby PE BGP
   Community, then the PE that supports this specification performs as
   follows:

      when the PE determines (the use of the particular method to detect
      the failure is outside the scope of this document) that C-S is not
      reachable through some other PE (more details are in Section 4.3),
      the PE MAY install VRF PIM state corresponding to this Standby BGP
      C-multicast route (the result will be that a PIM Join message will
      be sent to the CE towards C-S, and that the PE will receive (C-S,
      C-G) traffic), and the PE MAY forward (C-S, C-G) traffic received
      by the PE to other PEs through a P-tunnel rooted at the PE.

Would these updates address your concerns?

Regards,
Greg

On Fri, Dec 18, 2020 at 6:09 PM Murray S. Kucherawy <superuser@gmail.com>
wrote:

>
>
> On Thu, Dec 17, 2020 at 8:57 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
>>
>> I can't quite parse the first sentence of Section 3.1.1.  Maybe this will
>>> help:
>>>
>>> OLD:
>>>
>>>    A condition to consider that the status of a P-tunnel is Up is that
>>>    the root of the tunnel, as determined in the x-PMSI Tunnel attribute,
>>>    is reachable through unicast routing tables.
>>>
>>> NEW:
>>>
>>>    When determining whether the status of a P-tunnel is Up, a condition
>>>    to consider is whether the root of the tunnel, as determined in the
>>>    x-PMSI Tunnel attribute, is reachable through unicast routing tables.
>>>
>> GIM>> Thank you for the suggested text, it is much clearer. I might
>> propose a small re-wording to get the following:
>> NEW TEXT:
>>
>> When determining if the status of a P-tunnel is Up,
>> a condition to consider is whether the root of the tunnel,
>> as specified in the x-PMSI Tunnel attribute, is reachable
>> through unicast routing tables.
>>
>> What do you think?
>>
>
> Yep, that's better.
>
>
>>> Section 3.1.2 has a similar concern.
>>>
>> GIM>> I agree and propose the following update:
>> OLD TEXT:
>>     A condition to consider a tunnel status as Up can be that the last-
>>    hop link of the P-tunnel is Up.
>> NEW TEXT:
>>    When determining if the status of a P-tunnel is Up, a condition to
>>    consider is whether the last-hop link of the P-tunnel is Up.
>>
>
> Looks good.
>
>
>>> Why is that a SHOULD and not a MUST in Section 3.1.6.1?
>>
>> GIM>> The thinking, as I recall, was that the operator might re-enable
>> P-tunnel tracking, and not deleting the p2mp BFD session(s) might make an
>> implementation to resume tracking faster. Though the gain might be
>> negligent for a single BFD session, but if the same PE is the root for
>> multiple multicast trees, such behavior might be useful. But thinking about
>> that now, we might give the same flexibility and still use MUST. Please
>> review the following update:
>> OLD TEXT:
>>   o  the P2MP BFD session SHOULD be deleted.
>> NEW TEXT:
>>    o  the P2MP BFD session MUST be deleted.  The session MAY be deleted
>>       after some of time.  If an implementation uses a timer to delay
>>       the cleanup, it MUST allow the configuration of the delay
>>       interval, and use a reasonable default value.
>>
>
> Taking my own run at it; either is fine:
>
> o the P2MP BFD session MUST be deleted.  The session MAY be deleted after
> some configurable delay, which should have a reasonable default.
>
>
>> Same question about
>>> 3.1.6.2,
>>
>> GIM>> I think that it was the same reasoning. Would applying the update
>> as above be helpful?
>>
>
> Sure.
>
>
>>
>>> and the ones in 4.2.
>>
>> GIM>> I think these two SHOULDs could have been MAYs but not MUSTs. In
>> fact, the text that follows uses MAY and then it is used to illustrate what
>> constitutes "cold root standby", "warm root standby, and "hot root
>> standby". The latter is the case when both SHOULD are followed.
>> Do you think that is reasonable?
>>
>
> My concern generally is just this:
>
> Or, if they are correctly SHOULDs, you might
>>> consider giving some guidance to the reader about when one might go about
>>> deviating from the advice given, since SHOULD offers a choice.
>>>
>>
> If you feel that your suggestion resolves that concern, I'm happy.
>
> -MSK
>

--00000000000011327405b6c8082c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Murray,<div>thank you for the suggested text that makes=
 our intention is crystal clear. I&#39;ve updated the text and used your te=
xt in the second place:</div><div>OLD TEXT:</div><div>=C2=A0 =C2=A0o =C2=A0=
SHOULD delete the P2MP BFD session associated with the P-tunnel;<br></div><=
div>NEW TEXT:</div><div>=C2=A0 =C2=A0o =C2=A0the P2MP BFD session associate=
d with the P-tunnel MUST be deleted.<br>=C2=A0 =C2=A0 =C2=A0 The session MA=
Y be deleted after some configurable delay, which<br>=C2=A0 =C2=A0 =C2=A0 s=
hould have a reasonable default.<br></div><div><br></div><div>And s/SHOULD/=
MAY/ in Section 4.2:</div><div>=C2=A0 =C2=A0When a PE receives a C-multicas=
t route for a particular (C-S, C-G),<br>=C2=A0 =C2=A0and the RT carried in =
the route results in importing the route into a<br>=C2=A0 =C2=A0particular =
VRF on the PE, if the route carries the Standby PE BGP<br>=C2=A0 =C2=A0Comm=
unity, then the PE that supports this specification performs as<br>=C2=A0 =
=C2=A0follows:<br><br>=C2=A0 =C2=A0 =C2=A0 when the PE determines (the use =
of the particular method to detect<br>=C2=A0 =C2=A0 =C2=A0 the failure is o=
utside the scope of this document) that C-S is not<br>=C2=A0 =C2=A0 =C2=A0 =
reachable through some other PE (more details are in Section 4.3),<br>=C2=
=A0 =C2=A0 =C2=A0 the PE MAY install VRF PIM state corresponding to this St=
andby BGP<br>=C2=A0 =C2=A0 =C2=A0 C-multicast route (the result will be tha=
t a PIM Join message will<br>=C2=A0 =C2=A0 =C2=A0 be sent to the CE towards=
 C-S, and that the PE will receive (C-S,<br>=C2=A0 =C2=A0 =C2=A0 C-G) traff=
ic), and the PE MAY forward (C-S, C-G) traffic received<br>=C2=A0 =C2=A0 =
=C2=A0 by the PE to other PEs through a P-tunnel rooted at the PE.<br></div=
><div><br></div><div>Would these updates address your concerns?</div><div><=
br></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_qu=
ote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Dec 18, 2020 at 6:09 PM =
Murray S. Kucherawy &lt;<a href=3D"mailto:superuser@gmail.com">superuser@gm=
ail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_=
quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Dec 17, 2020 at 8:57 P=
M Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank=
">gregimirsky@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div dir=3D"ltr"><br><div class=3D"gmail_quote"><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex">
I can&#39;t quite parse the first sentence of Section 3.1.1.=C2=A0 Maybe th=
is will help:<br>
<br>
OLD:<br>
<br>
=C2=A0 =C2=A0A condition to consider that the status of a P-tunnel is Up is=
 that<br>
=C2=A0 =C2=A0the root of the tunnel, as determined in the x-PMSI Tunnel att=
ribute,<br>
=C2=A0 =C2=A0is reachable through unicast routing tables.<br>
<br>
NEW:<br>
<br>
=C2=A0 =C2=A0When determining whether the status of a P-tunnel is Up, a con=
dition<br>
=C2=A0 =C2=A0to consider is whether the root of the tunnel, as determined i=
n the<br>
=C2=A0 =C2=A0x-PMSI Tunnel attribute, is reachable through unicast routing =
tables.<br></blockquote><div>GIM&gt;&gt; Thank you for the suggested text, =
it is much clearer. I might propose a small re-wording to get the following=
:</div><div>NEW TEXT:</div></div><blockquote style=3D"margin:0px 0px 0px 40=
px;border:medium none;padding:0px"><div class=3D"gmail_quote"><div>When det=
ermining if the status of a P-tunnel is Up,</div></div><div class=3D"gmail_=
quote"><div>a condition to consider is whether the root of the tunnel,</div=
></div><div class=3D"gmail_quote"><div>as specified in the x-PMSI Tunnel at=
tribute, is reachable</div></div><div class=3D"gmail_quote"><div>through un=
icast routing tables.=C2=A0</div></div></blockquote>What do you think?<br><=
/div></blockquote><div><br></div><div>Yep, that&#39;s better.</div><div> <b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">=
<div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
">
<br>
Section 3.1.2 has a similar concern.<br></blockquote><div>GIM&gt;&gt; I agr=
ee and propose the following update:</div><div>OLD TEXT:</div><div>=C2=A0 =
=C2=A0 A condition to consider a tunnel status as Up can be that the last-<=
/div>=C2=A0 =C2=A0hop link of the P-tunnel is Up.</div><div class=3D"gmail_=
quote">NEW TEXT:</div><div class=3D"gmail_quote">=C2=A0 =C2=A0When determin=
ing if the status of a P-tunnel is Up, a condition to<br>=C2=A0 =C2=A0consi=
der is whether the last-hop link of the P-tunnel is Up.<br></div></div></bl=
ockquote><div><br></div><div>Looks good.</div><div> <br></div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_q=
uote"><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Why is that a SHOULD and not a MUST in Section 3.1.6.1? </blockquote><div>G=
IM&gt;&gt; The thinking, as I recall, was that the operator might re-enable=
 P-tunnel tracking, and not deleting the p2mp BFD session(s) might make an =
implementation to resume tracking faster. Though the gain might=C2=A0be neg=
ligent for a single BFD session, but if the same PE is the root for multipl=
e multicast trees, such behavior might be useful. But thinking about that n=
ow, we might give the same flexibility and still use MUST. Please review th=
e following update:</div><div>OLD TEXT:</div><div>=C2=A0 o =C2=A0the P2MP B=
FD session SHOULD be deleted.<br></div><div>NEW TEXT:</div><div>=C2=A0 =C2=
=A0o =C2=A0the P2MP BFD session MUST be deleted.=C2=A0 The session MAY be d=
eleted<br>=C2=A0 =C2=A0 =C2=A0 after some of time.=C2=A0 If an implementati=
on uses a timer to delay<br>=C2=A0 =C2=A0 =C2=A0 the cleanup, it MUST allow=
 the configuration of the delay<br>=C2=A0 =C2=A0 =C2=A0 interval, and use a=
 reasonable default value.<br></div></div></div></blockquote><div><br></div=
><div>Taking my own run at it; either is fine:</div><div><br></div><div>o t=
he P2MP BFD session MUST be deleted.=C2=A0 The session MAY be deleted after=
 some configurable delay, which should have a reasonable default.</div><div=
> <br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"l=
tr"><div class=3D"gmail_quote"><div><br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">Same question about<br>
3.1.6.2, </blockquote><div>GIM&gt;&gt; I think that it was the same reasoni=
ng. Would applying the update as above be helpful?</div></div></div></block=
quote><div><br></div><div>Sure.</div><div> <br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_quote"><di=
v>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">and the one=
s in 4.2.=C2=A0 </blockquote><div>GIM&gt;&gt; I think these two SHOULDs cou=
ld have been MAYs but not MUSTs. In fact, the text that follows uses MAY an=
d then it is used to illustrate what constitutes=C2=A0&quot;cold root stand=
by&quot;, &quot;warm root standby, and &quot;hot root standby&quot;. The la=
tter is the case when both SHOULD are followed.</div><div>Do you think that=
 is reasonable?</div></div></div></blockquote><div><br></div><div>My concer=
n generally is just this:<br></div><div> <br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_quote"><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">Or, if they are correctly SHOU=
LDs, you might<br>
consider giving some guidance to the reader about when one might go about<b=
r>
deviating from the advice given, since SHOULD offers a choice.<br></blockqu=
ote></div></div></blockquote><div><br></div><div>If you feel that your sugg=
estion resolves that concern, I&#39;m happy.</div><div><br></div><div>-MSK<=
br></div></div></div>
</blockquote></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
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To: Benjamin Kaduk <kaduk@mit.edu>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Benjamin Kaduk's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Hi Ben,
many thanks for your kind considerations of the proposed updates. Please
find my follow-up notes in-lined under the GIM2>> tag below.
Attached is the diff that highlights all the updates including the ones
that address comments by Martin, Barry, Roman, and Murray.
I will upload the new version if you agree to the latest proposed updates.

Regards,
Greg

On Thu, Dec 17, 2020 at 6:02 PM Benjamin Kaduk <kaduk@mit.edu> wrote:

> Hi Greg,
>
> Also inline (though there's not much left to say)
>
> On Wed, Dec 16, 2020 at 12:17:55PM -0800, Greg Mirsky wrote:
> > Hi Ben,
> > thank you for the review, and your detailed comments and direct
> questions.
> > Please find my answers and proposed updates in-lined below under the
> GIM>>
> > tag.
> > Attached, please find, the diff highlighting the updates and the new
> > working version of the draft.
> >
> > Regards,
> > Greg
> >
> > On Mon, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker <
> > noreply@ietf.org> wrote:
> >
> > > Benjamin Kaduk has entered the following ballot position for
> > > draft-ietf-bess-mvpn-fast-failover-13: Discuss
> > >
> > > When responding, please keep the subject line intact and reply to all
> > > email addresses included in the To and CC lines. (Feel free to cut th=
is
> > > introductory paragraph, however.)
> > >
> > >
> > > Please refer to
> https://www.ietf.org/iesg/statement/discuss-criteria.html
> > > for more information about IESG DISCUSS and COMMENT positions.
> > >
> > >
> > > The document, along with other ballot positions, can be found here:
> > > https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
> > >
> > >
> > >
> > > ---------------------------------------------------------------------=
-
> > > DISCUSS:
> > > ---------------------------------------------------------------------=
-
> > >
> > > Let's talk about what the requirements are for consistency across PEs
> in
> > > the algorithm for selecting the Primary Upstream PE.  Section 4 notes
> > > that "all the PEs of that MVPN [are required] to follow the same UMH
> > > selection procedure", but leaves the option of non-revertive behavior
> as
> > > something that "MAY also be supported by an implementation", without
> > > requirement for consistency across all PEs.  It seems to me that if
> some
> > > PEs use non-revertive behavior and others do not, then they will
> > > disagree as to which PE is the Primary (or active) PE in some cases,
> > > which seems to conflict with the initial guidance that all PEs needed
> to
> > > pick the same one.  Is it perhaps that the PEs need to agree on which
> PE
> > > is to be advertised as Primary but not necessarily to actually be usi=
ng
> > > that one for traffic?  Or am I missing something?
> > >
> > GIM>> Thank you for pointing out this inconsistency. I agree that the
> text
> > needs some tightening. Below is the proposed update:
> > OLD TEXT:
> >    Such behavior is referred to as
> >    "revertive" behavior and MUST be supported.  Non-revertive behavior
> >    refers to the behavior of continuing to select the backup PE as the
> >    UMH even after the Primary has come up.  This non-revertive behavior
> >    MAY also be supported by an implementation and would be enabled
> >    through some configuration.
> > NEW TEXT:
> > Such behavior is referred to as
> >    "revertive" behavior and MUST be supported.  Non-revertive behavior
> >    refers to the behavior of continuing to select the backup PE as the
> >    UMH even after the Primary has come up.  This non-revertive behavior
> >    MAY also be supported by an implementation and would be enabled
> >    through some configuration.  Selection of the behavior, revertive or
> >    non-revertive, is an operational issue, but it MUST be consistent on
> >    all PEs in the given MVPN.
>
> Looks good; I'm glad this was just a simple change.
>
> > >
> > >
> > > ---------------------------------------------------------------------=
-
> > > COMMENT:
> > > ---------------------------------------------------------------------=
-
> > >
> > > Section 1
> > >
> > >    Section 3 describes local procedures allowing an egress PE (a PE
> > >    connected to a receiver site) to take into account the status of
> > >    P-tunnels to determine the Upstream Multicast Hop (UMH) for a give=
n
> > >    (C-S, C-G).  [...]
> > >
> > > Does it also apply to (C-*, C-G)?  (I'll just mention it once, but th=
e
> > > handling seems to be somewhat inconsistent throughout the document,
> with
> > > (C-*,C-G) getting mentioned sometimes but not always, and no pattern
> > > obvious to me for when it is or is not included.  I think I see some
> > > instances where (C-*, C-G) does not make sense, so it would probably
> not
> > > be a universal replacement.)
> > >
> > GIM>> Yes, it cannot be used interchangeably. We've followed the notati=
on
> > as defined in the last paragraph of Section 3.1 RFC 6513:
> >    ... C-group address would be a group address in a
> >    VPN's address space.  A C-tree is a multicast distribution tree
> >    constructed and maintained by the PIM C-instances.  A C-flow is a
> >    stream of multicast packets with a common C-source address and a
> >    common C-group address.  We will use the notation "(C-S,C-G)" to
> >    identify specific C-flows.  If a particular C-tree is a shared tree
> >    (whether unidirectional or bidirectional) rather than a source-
> >    specific tree, we will sometimes speak of the entire set of flows
> >    traveling that tree, identifying the set as "(C-*,C-G)".
> > It is my understanding, that the one reference to (C-*,C-G) in the draf=
t
> is
> > in Section 3 bullet B:
> >           The S-PMSI can be advertised only after the
> >           Upstream PE receives a C-multicast route for (C-S, C-G)/(C-*,
> >           C-G) to be carried over the advertised S-PMSI.
> > The reference is not an introduced text but an informational summary of
> > Section 5.1 RFC 6513. The text preceding that reference is intended to
> > clarify its status:
> >   There are three options specified in Section 5.1 of [RFC6513] for a
> >    downstream PE to select an Upstream PE.
> > Would you suggest an additional text?
>
> I don't see a need for additional text.  Thanks for walking me through it
> -- I'm pretty sure I had lost track of the fact that the =C2=A73 (and onl=
y)
> occurrence of "(C-*, C-G)" was in a part that was supposed to be
> summarizing RFC 6513 by the time I stumbled upon it.  With the extra
> context it all seems clear.
>
> > >
> > >    Section 5 describes a "hot leaf standby" mechanism that can be use=
d
> > >    to improve failover time in MVPN.  The approach combines mechanism=
s
> > >    defined in Section 3 and Section 4 has similarities with the
> solution
> > >    described in [RFC7431] to improve failover times when PIM routing =
is
> > >    used in a network given some topology and metric constraints.
> > >
> > > nit: grammar issue around "has similarities with" (maybe needs a
> leading
> > > "and"?)
> > >
> > GIM>> Thank you. Updated to:
> > NEW TEXT:
> >    Section 5 describes a "hot leaf standby" mechanism that can be used
> >    to improve failover time in MVPN.  The approach combines mechanisms
> >    defined in Section 3 and Section 4, and has similarities with the
> >    solution described in [RFC7431] to improve failover times when PIM
> >    routing is used in a network given some topology and metric
> >    constraints.
> > >
> > >
> > >    VPNs.  An operator would enable these mechanisms using a method
> > >    discussed in Section 3 in combination with the redundancy provided
> by
> > >    a standby PE connected to the source of the multicast flow, and it
> is
> > >    assumed that all PEs in the network would support these mechanisms
> > >    for the procedures to work.  In the case that a BGP implementation
> > >
> > > Is it a matter of "the procedure will not work at all unless all PEs =
in
> > > the network support it", or "only the PEs that support it will get th=
e
> > > benefits of it"?  [The next sentence suggests an anwer...]
> > >
> > GIM>> The sentence might be too long. Yes, only PEs that support the ne=
w
> > Standby PE community and use any of UMH monitoring methods would conver=
ge
> > faster than PEs that don't support both features. Would the re-wording =
as
> > below make the text clear:
> > NEW TEXT:
> >    An operator would enable these mechanisms using a method
> >    discussed in Section 3 combined with the redundancy provided by a
> >    standby PE connected to the multicast flow source.  PEs that support
> >    these mechanisms would converge faster and thus provide a more stabl=
e
> >    multicast service.
>
> Yes, that looks pretty crisp -- thanks!
>
> > >
> > > Section 3
> > >
> > >    Section 9.1.1 of [RFC6513] are applicable when using I-PMSI
> > >    P-tunnels.  That document is a foundation for this document, and i=
ts
> > >    processes all apply here.  Section 9.1.1 mandates the use of
> specific
> > >    procedures for sending intra-AS I-PMSI A-D Routes.
> > >
> > > (nit) the second "Section 9.1.1" is also referring to RFC 6513, not
> this
> > > document, which would be the default interpretation of a bare section
> > > reference.
> >
> >
> > > (not-nit) The referenced procedure seems to be about processing, not
> > > sending, intra-AS I-PMSI A-D routes.  Am I misreading something?
> > >
> > GIM>> You are right. The sentence mischaracterizes Section 9.1.1 and ha=
s
> no
> > informational value. Removed it altogether.
> >
> > >
> > > Section 3.1
> > >
> > >    Different factors can be considered to determine the "status" of a
> > >    P-tunnel and are described in the following sub-sections.  The
> > >    optional procedures described in this section also handle the case
> > >    the downstream PEs do not all apply the same rules to define what
> the
> > >    status of a P-tunnel is (please see Section 6), and some of them
> will
> > >    produce a result that may be different for different downstream PE=
s.
> > >
> > > nit: I think it's better to put a word like "where" in "the case the
> > > downtream PEs".
> > >
> > GIM>> I've tried it like the following:
> > NEW TEXT:
> >    The
> >    optional procedures described in this section also handle the case
> >    when the downstream PEs do not all apply the same rules to define
> >    what the status of a P-tunnel is (please see Section 6), and some of
> >    them will produce a result that may be different for different
> >    downstream PEs.
> >
> > >
> > > Section 3.1.3
> > >
> > >    corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
> > >    transitions from Up to Down state, the Upstream PE that is the
> > >    ingress of the P-tunnel MUST NOT be considered a valid UMH.
> > >
> > > (nit?) I'm not sure how much precedent there is for using "valid" in
> > > this context -- IIUC the previous discussion of this process referred
> > > only to whether a PE is a candidate for being the UMH.
> > >
> > GIM>> I agree, "candidate" is missing here. Proposed update:
> > NEW TEXT:
> >    If the P-tunnel
> >    transitions from Up to Down state, the Upstream PE that is the
> >    ingress of the P-tunnel MUST NOT be considered as a valid candidate
> >    UMH.
> >
> > >
> > > Section 3.1.5
> > >
> > >    When such a procedure is used, in the context where fast restorati=
on
> > >    mechanisms are used for the P-tunnels, a configurable timer MUST b=
e
> > >    set on the downstream PE to wait before updating the UMH, to let t=
he
> > >    P-tunnel restoration mechanism to execute its actions.  An
> > >    implementation SHOULD use three seconds as the default value for
> this
> > >    timer.
> > >
> > > How does this interact with the value of the maximum inter-packet tim=
e?
> > > Suppose that I know to expect at least one packet every ten seconds.
> Do
> > > I wait ten seconds after receiving the last packet and then another
> > > three seconds, before engaging in an UMH change?
> > >
> > GIM>> This scenario is similar to the use of an active OAM detecting a
> > network failure. The role of the timer to trigger an action if a certai=
n
> > number of packets have not arrived. Since the maximum inter-packet time
> is
> > known, a downstream PE has an expectation of receiving a packet within =
a
> > time interval large than the maximum inter-packet interval. In practice=
,
> > the timer could be set three times the maximum inter-packet interval, s=
o
> > that it expires if three consecutive packets were not received. In the
> case
> > you've described, I think that the timer must be set larger than 10
> > seconds, probably 30+ seconds. Would you suggest any additional text
> here?
>
> I think my uncertainty here is whether the 3 seconds default is intended =
to
> be the only waiting period or an additional waiting period after
> determining that the tunnel is "probably down" but before updating the UM=
H.
> (Looking at it again now, the latter is a bit of a strained
> interpretation.)  That said, your description here suggests that the
> operative mechanism is to determine that the tunnel is probably down by
> passing a threshold number of packets that were expected but did not
> arrive, with some accomodation for jitter in the network if packets are
> supposed to be arriving very quickly so that "just wait for 3 missed
> packets" isn't long enough to account for (e.g.) interrupt handling on a
> forwarder.  So the intended sentiment seems to be something like
> "Determining that a tunnel is probably down by waiting for enough packets
> to fail to arrive as expected is a heuristic and operational matter that
> depends on the maximum inter-packet time.  A timeout of three seconds is =
a
> generally suitable default waiting period to ascertain that the tunnel is
> down, though other values would be needed for atypical conditions."


> I would not complain if you kept the original text, though.
>
GIM2>> I much appreciate the consideration you gave to the document and
glad to use the suggested text.

>
> > >
> > >    In cases where this mechanism is used in conjunction with the meth=
od
> > >    described in Section 5, no prior knowledge of the rate of the
> > >    multicast streams is required; downstream PEs can compare receptio=
n
> > >    on the two P-tunnels to determine when one of them is down.
> > >
> > > This feels a little underspecified; is there a reference or more
> > > guidance that we could give about turning a stream of received packet=
s
> > > on one tunnel into a maximum inter-packet time on another tunnel,
> > > supposedly carrying the same traffic?
> > >
> > GIM>> I think that this text refers to 1+1 protection, i.e.,
> Active-Active
> > P-tunnels. In that scenario, the determination of the P-tunnel's state
> can
> > be done by comparing it to the reception state of the other P-tunnel in
> the
> > redundancy group. But there might be corner cases, like a significant
> delay
> > in one of P-tunnels, that may need consideration before recommending th=
is
> > method. I don't think that it is in the scope of the document. Would
> > appending the paragraph with "The detailed specification of this
> mechanism
> > is outside the scope of this document" be acceptable?
>
> I think my confusion stems from the first paragraph of the section seemin=
g
> to emphasize the dependence on the "maximum inter-packet time", but the
> best algorithm to use in the 1+1 case seems likely to be different (i.e.,
> one that makes use of the full knowledge of the incoming packet
> distribution).  So my suggestion would be something more along the lines =
of
> "no prior knowledge of the rate or maximum inter-packet time on the
> multicast streams is required; downstream PEs can compare actual packet
> reception statistics on the two P-tunnels to determine when one of them i=
s
> down".  (Adding a "details are out of scope of the document" to that woul=
d
> be fine, of course.)
>
GIM2>> Thanks again for the suggested text.

>
> > >
> > > Section 3.1.6
> > >
> > >       *  one octet-long field of TLV's Type value (Section 7.3)
> > >
> > >       *  one octet-long field of the length of the Value field in
> octets
> > >
> > >       *  variable length Value field.
> > >
> > >       The length of a TLV MUST be multiple of four octets.
> > >
> > > I assume this is the total length, not the value in the length field?
> > >
> > GIM>> Correct. Would the following update make it clearer?
> > NEW TEXT:
> >       Figure 2 presents the Optional TLV format TLV that
> >       consists of:
> >
> >       *  Type - a one-octet-long field that characterizes the
> >          interpretation of the Value field (Section 7.3)
> >
> >       *  Length - a one-octet-long field equal to the length of the
> >          Value field in octets
> >
> >       *  Value - a variable-length field.
> >
> >       The length of a TLV as a whole MUST be multiple of four octets.
>
> Yes, that's more clear.  (But given Jeff and Alvaro's comments maybe the
> whole thing will change anyway.)
>
> > >
> > >    The BFD Discriminator attribute MUST be considered malformed if it=
s
> > >    length is not a non-zero multiple of four.  If the attribute
> > >    considered malformed, the UPDATE message SHALL be handled using th=
e
> > >    approach of Attribute Discard per [RFC7606].
> > >
> > > nit: s/attribute considered/attribute is considered/
> > >
> > GIM>> Thank you! Updated text to:
> > NEW TEXT:
> >    The BFD Discriminator attribute MUST be considered malformed if its
> >    length is not a non-zero multiple of four.  If the attribute is
> >    deemed to be malformed, the UPDATE message SHALL be handled using th=
e
> >    approach of Attribute Discard per [RFC7606].
> >
> > >
> > > Section 3.1.6.1
> > >
> > >    o  MUST periodically transmit BFD Control packets over the x-PMSI
> > >       P-tunnel after the P-tunnel is considered established.  Note th=
at
> > >       the methods to declare a P-tunnel has been established are
> outside
> > >       the scope of this specification.
> > >
> > > Is there a good reference for how to choose the period of transmissio=
n?
> > >
> > GIM>> Not really. There are many factors that an operator should consid=
er
> > when configuring the frequency of BFD packets on the MultipointHead
> system.
> > One of the aspects to keep in mind is that unlike p2p BFD, there's no
> > interval negotiation phase in p2mp BFD. As a result, a tail has no
> > influence over the interval at which the head of the p2mp BFD session
> > transmits BFD Control messages.
>
> Okay.  (Yes, I do remember there was a fair bit of contention in the
> reviews of the multipoint BFD document relating to the transmission
> frequency and the potential to overload the network in the absence of
> feedback ... luckily that was a case where I was able to sit back and
> watch, and not have to be taking a position.)
>
> > >
> > >    If the tracking of the P-tunnel by using a P2MP BFD session is
> > >    enabled after the x-PMSI A-D Route has been already advertised, th=
e
> > >    x-PMSI A-D Route MUST be re-sent with precisely the same attribute=
s
> > >    as before and the BFD Discriminator attribute included.
> > >
> > > Pedantically, it seems like "precisely the same attributes as before"
> > > is incompatible with adding the BFD Discriminator attribute.  Phrasin=
g
> > > that discusses "the only change between the previous advertisement an=
d
> > > the new advertisement" would not suffer from such a potential issue.
> > > (And similarly for when the BFD Discriminator attribute is to be
> > > removed, a couple paragraphs later.)
> > >
> > GIM>> Great, thank you. Applied in both cases:
> > NEW TEXT:
> >    If the tracking of the P-tunnel by using a P2MP BFD session is
> >    enabled after the x-PMSI A-D Route has been already advertised, the
> >    x-PMSI A-D Route MUST be re-sent with the only change between the
> >    previous advertisement and the new advertisement to be the inclusion
> >    of the BFD Discriminator attribute.
> > and
> >    o  x-PMSI A-D Route MUST be re-sent with the only change between the
> >       previous advertisement and the new advertisement be the exclusion
> >       of the BFD Discriminator attribute;
> >
> > >
> > > Section 3.1.6.2
> > >
> > >    o  MUST use the source IP address of the BFD Control packet, the
> > >       value of the BFD Discriminator field, and the x-PMSI Tunnel
> > >       Identifier [RFC6514] the BFD Control packet was received to
> > >       properly demultiplex BFD sessions.
> > >
> > > nit: missing word around "the BFD Control packet was received" (maybe
> > > "received on/in"?).
> > >
> > GIM>> "on" seems the better option. Updated accordingly.
> >
> > >
> > >    According to [RFC8562], if the downstream PE receives Down or
> > >    AdminDown in the State field of the BFD Control packet or associat=
ed
> > >    with the BFD session Detection Timer expires, the BFD session is
> > >
> > > nit: "the BFD Detection Timer associated with the BFD session expires=
"
> > >
> > GIM>> Thank you for the helpful suggestion. Updated.
> >
> > >
> > >    PE, while others are considered as Standby Upstream PEs.  In such =
a
> > >    scenario, when the P-tunnel is considered down, the downstream PE
> MAY
> > >    initiate a switchover of the traffic from the Primary Upstream PE =
to
> > >    the Standby Upstream PE only if the Standby Upstream PE is deemed
> > >    available.
> > >
> > > I'm not sure that we've defined what it means for an Upstream PE to b=
e
> > > deemed "available', yet.  I guess it's possible that there is not an
> > > established P-Tunnel between the (selected) Standby Upstream PE and t=
he
> > > donstream PE, so just using the Up/Down/not-known-to-be-Down status o=
f
> > > that P-tunnel is not an option...
> > >
> > GIM>> The wording is sloppy, agree. I think that the intention was to s=
ay
> > "deemed in the Up state". That can be determined using the p2mp BFD
> session
> > with Standby Upstream PE acting as its MultipointHead. The proposed
> update
> > is as follows:
> > NEW TEXT:
> >    In such a scenario, when the P-tunnel is considered
> >    down, the downstream PE MAY initiate a switchover of the traffic fro=
m
> >    the Primary Upstream PE to the Standby Upstream PE only if the
> >    Standby Upstream PE is deemed to be in the Up state.  That MAY be
> >    determined from the state of a P2MP BFD session with the Standby
> >    Upstream PE as the MultipointHead.
> >
> > >
> > >    If the downstream PE's P-tunnel is already established when the
> > >    downstream PE receives the new x-PMSI A-D Route with BFD
> > >    Discriminator attribute, the downstream PE MUST associate the valu=
e
> > >    of BFD Discriminator field with the P-tunnel and follow procedures
> > >    listed above in this section if and only if the x-PMSI A-D Route w=
as
> > >    properly processed as per [RFC6514], and the BFD Discriminator
> > >    attribute was validated.
> > >
> > > We did not discuss any validation of the BFD Discriminator attribute =
in
> > > =C2=A73.1.6; what procedures would this process entail?
> > >
> > GIM>> There's, so far, only one validation condition:
> >
> > The length of a TLV as a whole MUST be multiple of four octets.
> >
> >
> > > Section 4
> > >
> > >    The procedures described below are limited to the case where the
> site
> > >    that contains C-S is connected to two or more PEs, though, to
> > >    simplify the description, the case of dual-homing is described.  T=
he
> > >
> > > I suggest giving at least some considerations to how to choose betwee=
n
> > > multiple standby Upstream PEs when there are more than one available.
> > >
> > GIM>> I understand your idea but that might be a whole new specificatio=
n
> > similar to the selection of UMH from the list of candidates. Perhaps
> > stating that the selection might use known methods but the specifics ar=
e
> > outside the scope of this document be acceptable? For example (sorry fo=
r
> a
> > longer quote):
> > NEW TEXT:
> >    The procedures described below are limited to the case where the sit=
e
> >    that contains C-S is connected to two or more PEs, though, to
> >    simplify the description, the case of dual-homing is described.  In
> >    the case where more than two PEs are connected to the C-s site,
> >    selection of the Standby PE can be performed using one of the method=
s
> >    of selecting a UMH.  Details of the selection are outside the scope
> >    of this document.  The procedures require all the PEs of that MVPN t=
o
> >    follow the same UMH selection procedure, as specified in [RFC6513],
> >    whether the PE selected based on its IP address, hashing algorithm
> >    described in section 5.1.3 of [RFC6513], or Installed UMH Route.  Th=
e
> >    procedures assume that if a site of a given MVPN that contains C-S i=
s
> >    dual-homed to two PEs, then all the other sites of that MVPN would
> >    have two unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with
> >    its RD.
>
> I can understand that selecting from a list of (more than two) candidates
> might end up being complicated; I think your text here is sufficient to
> address my concern, by giving some indication of how the extension to the
> general case could be performed while acknowledging that it is not fully
> specified yet.
>
> > >
> > >    procedures require all the PEs of that MVPN to follow the same UMH
> > >    selection procedure, as specified in [RFC6513], whether the PE
> > >    selected based on its IP address, hashing algorithm described in
> > >    section 5.1.3 of [RFC6513], or Installed UMH Route.  The procedure=
s
> > >
> > > I assume that how the PEs agree on which procedure is in use does not
> > > involve something being advertised in-band, and is out of scope for
> this
> > > document.  But please say so!
> > >
> > GIM>> You are right, that is an operational issue and the management
> > plane's responsibility.
> > NEW TEXT:
> > The procedures require all the PEs of that MVPN to
> >    follow the same UMH selection procedure, as specified in [RFC6513],
> >    whether the PE selected based on its IP address, the hashing
> >    algorithm described in section 5.1.3 of [RFC6513], or Installed UMH
> >    Route.  The consistency of the UMH selection method used among all
> >    PEs is expected to be provided by the management plane.
> >
> > >
> > >    assume that if a site of a given MVPN that contains C-S is
> dual-homed
> > >    to two PEs, then all the other sites of that MVPN would have two
> > >    unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with its RD=
.
> > >
> > > nit: s/its RD/its own RD/
> > >
> > GIM>> Ack
> >
> > > Also, please confirm that the unicast routes are *to* C-S, vs *from*
> it.
> > >
> > GIM>> Though it might be somewhat counterintuitive, in the context of
> MVPN
> > "to" is correct.
>
> Thanks.
>
> > >
> > > Section 4.1
> > >
> > >    o  the NLRI is constructed as the C-multicast route with an RT tha=
t
> > >       identifies the Primary Upstream PE, except that the RD is the
> same
> > >       as if the C-multicast route was built using the Standby Upstrea=
m
> > >       PE as the UMH (it will carry the RD associated to the unicast V=
PN
> > >       route advertised by the Standby Upstream PE for S and a Route
> > >       Target derived from the Standby Upstream PE's UMH route's VRF R=
T
> > >       Import EC);
> > >
> > > This part is a bit confusing to me, since the first part says that th=
e
> > > RT identifies the Primary Upstream PE, but the second part says that
> the
> > > RT is derived from the Standy Upstream PE's [stuff].  But I'm happy t=
o
> > > trust you that the [stuff] makes it correct!
> > >
> > GIM>> Thank you for putting your trust in our collective thinking. AFAI=
K,
> > it works.
> >
> > >
> > > Section 4.2
> > >
> > >       when the PE determines (the use of the particular method to
> detect
> > >       the failure is outside the scope of this document) that C-S is
> not
> > >       reachable through some other PE, the PE SHOULD install VRF PIM
> > >
> > > It seems like a forward reference to =C2=A74.3 might be helpful.
> > >
> > GIM>> Thank you for your suggestion, the reference is added in the
> working
> > version.
> >
> > >
> > >    Section 9.3.2 of [RFC6514], describes the procedures of sending a
> > >    Source-Active A-D Route as a result of receiving the C-multicast
> > >    route.  These procedures MUST be followed for both the normal and
> > >    Standby C-multicast routes.
> > >
> > > There is no section 9.3.2 in RFC 6514.  There is a 9.2.3 that looks
> > > perhaps plausible, though the string "Source-Active" does not appear =
in
> > > it.
> > >
> > GIM>> Great catch, thank you! I believe that the correct section is in
> RFC
> > 6513, not RFC 6514. The former opens with:
> >    The issue described in Section 9.3.1 is resolved through the use of
> >    Source Active A-D routes.  In the remainder this section, we provide
> >    an example of how this works, along with an informal description of
> >    the procedures.
> > Would you agree RFC 6513 makes sense?
>
> That does look to make a lot more sense than 6514 did!
>
> > >
> > > Section 4.4.2
> > >
> > >    Source AS carried in the C-multicast route.  If the match is found=
,
> > >    and the C-multicast route carries the Standby PE BGP Community, th=
en
> > >    the ASBR MUST perform as follows:
> > >
> > > (I assume that there is room for local policy to modify this "MUST",
> > > e.g., if needed to protect against some form of attack ... perhaps it
> > > even goes without saying.)
> > >
> > GIM>> Indeed. Perhaps the following change makes it more accurate:
> > NEW TEXT:
> >    If the match is found,
> >    and the C-multicast route carries the Standby PE BGP Community, then
> >    the ASBR implementation that supports this specification MUST be
> >    configurable to perform as follows:
> >
> >    o  if the route was received over iBGP and its LOCAL_PREF attribute
> >       is set to zero, then it MUST be re-advertised in eBGP with a MED
> >       attribute (MULTI_EXIT_DISC) set to the highest possible value
> >       (0xffff)
> >
> >    o  if the route was received over eBGP and its MED attribute set to
> >       0xffff, then it MUST be re-advertised in iBGP with a LOCAL_PREF
> >       attribute set to zero
> >
> >    Other ASBR procedures are applied without modification and, when
> >    applied, MAY modify the above-listed behavior.
>
> Works for me :)
>
> > >
> > > Section 5
> > >
> > >    o  Upstream PEs use the "hot standby" optional behavior and thus
> will
> > >       forward traffic for a given multicast state as soon as they hav=
e
> > >       whether a (primary) BGP C-multicast route or a Standby BGP
> > >       C-multicast route for that state (or both)
> > >
> > > nit: the grammar is a bit weird here, after "as soon as they have"; I=
'm
> > > not confident that I could make an accurate suggestion for a fix.
> > >
> > GIM>> Would with a minor update it all reads better:
> > NEW TEXT:
> >       Upstream PEs use the "hot standby" optional behavior and thus wil=
l
> >       start forwarding traffic for a given multicast state after they
> >       have whether a (primary) BGP C-multicast route or a Standby BGP
> >       C-multicast route for that state (or both)
>
> I think that "whether" is not needed (though "either" might work in its
> stead).
>
GIM2>> Yes, it was not the best choice. Below is the newest version:
    o  Upstream PEs use the "hot standby" optional behavior and thus will
      start forwarding traffic for a given multicast state after they
      have a (primary) BGP C-multicast route or a Standby BGP
      C-multicast route for that state (or both)
>
>
> > >
> > > Section 6
> > >
> > > I could almost see the discussion of duplicate packets as being a
> > > subsection of the security considerations, though I don't mind leavin=
g
> > > it as-is.
> > >
> > GIM>> Thank you for agreeing.
> >
> > >
> > > Section 8
> > >
> > > We could perhaps make some pro forma note that the BFD Discriminator
> > > attribute, like all BGP attributes, typically does not benefit from
> > > cryptographic integrity protection and thus could be spoofed so as to
> be
> > > different than what is actually used by the multipoint BFD head.  Tha=
t
> > > said, I'm willing to let this fall under the incorporated-by-referenc=
e
> > > BGP security considerations.
> > >
> > GIM>> Thank you.
> >
> > >
> > > Is it worth noting that operating in "hot" standby mode will increase
> > > the general level of traffic on the VPN and thus susceptibility to Do=
S?
> > >
> > GIM>> We use hot standby in the control plane only. That would add some
> BGP
> > traffic but would not as much as 1+1 protection in the data plane. I
> think
> > that the amount of the additional load in the VPN with the "hot standby=
"
> > defined in the draft unlikely to make PEs more volnurable to DoS. What =
do
> > you think?
>
> I think I was assuming this was "hot" in the data plane as well as the
> control plane, when I Wrote the comment.  For just the control plane, you=
r
> assessment seems reasonable.
>
> > >
> > >    This document uses P2MP BFD, as defined in [RFC8562], which, in
> turn,
> > >    is based on [RFC5880].  Security considerations relevant to each
> > >    protocol are discussed in the respective protocol specifications.
> An
> > >    implementation that supports this specification MUST use a mechani=
sm
> > >    to control the maximum number of P2MP BFD sessions that can be
> active
> > >    at the same time.
> > >
> > > What is the objective that this control is designed to achieve?  I ca=
n
> > > "control the maximum number of sessions" by asserting the maximum
> number
> > > to be an absurdly large value, but I don't think that would meet the
> > > spirit of this requirement (it does meet the letter of the
> requirement).
> > >
> > GIM>> Though this recommendation may look as too vague, I think it is
> > helpful to a developer. I imagine, as we've discussed in regard to the
> > selection of the interval between BFD Control packets, an operator will
> > consider the overall load of BFD Control packets across all active BFD
> > sessions. Do you think that a sentence that connects the number of p2mp
> BFD
> > sessions and the rate of BFD Control packets be helpful in this context=
?
>
> Or even another clause, maybe something like "to limit the overall amount
> of capacity used by the BFD traffic".  (I think part of what triggered my
> comment is that this is "MUST use", not "MUST provide" -- the goal of a
> "MUST provide" is fairly obvious but "MUST use" with no specific bound
> could be seen as make-work.)
>
GIM2>> More thanks for this suggestion. I think that your clause is more
general and better expresses our concern in regard to the potential impact
of using p2mp BFD. Below is the new text I propose:
NEW TEXT:
   This document uses P2MP BFD, as defined in [RFC8562], which, in turn,
   is based on [RFC5880].  Security considerations relevant to each
   protocol are discussed in the respective protocol specifications.  An
   implementation that supports this specification MUST provide a
   mechanism to limit the overall amount of capacity used by the BFD
   traffic (as the combination of the number of active P2MP BFD sessions
   and the rate of BFD Control packets to process).

>
> > >
> > >    The methods described in Section 3.1 may produce false-negative
> state
> > >    changes that can be the trigger for an unnecessary convergence in
> the
> > >    control plane, ultimately negatively impacting the multicast servi=
ce
> > >    provided by the VPN.  An operator is expected to consider the
> network
> > >    environment and use available controls of the mechanism used to
> > >    determine the status of a P-tunnel.
> > >
> > > We mentioned earlier (e.g., in =C2=A73.1) that similar negative effec=
ts can
> > > occur when resiliency mechanisms at different layers interact; that
> > > might be worth repeating here.
> > >
> > GIM>> One of such references is in Section 3.1.2:
> >    In many cases, it is not practical to use both protection
> >    methods at the same time because uncorrelated timers might cause
> >    unnecessary switchovers and destabilize the network.
> > Thus we referred to Section 3.1 as the encompassing reference to all
> > possible scenarios. Would you agree with that?
>
> Wow, that looks like a real short-term memory failure on my part (=C2=A73=
.1 was
> mentioned just in the previous sentence!).  Sorry for the noise; this is
> fine as-is.
>
> Thanks again,
>
> Ben
>

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<div dir=3D"ltr">Hi Ben,<div>many thanks for your kind considerations of th=
e proposed updates. Please find my follow-up notes in-lined=C2=A0under the =
GIM2&gt;&gt; tag below.</div><div></div><div>Attached is the diff that high=
lights all the updates including the ones that address comments by Martin, =
Barry, Roman, and Murray.</div><div>I will upload the new version if you ag=
ree to the latest proposed updates.<br></div><div><br></div><div>Regards,</=
div><div>Greg</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D=
"gmail_attr">On Thu, Dec 17, 2020 at 6:02 PM Benjamin Kaduk &lt;<a href=3D"=
mailto:kaduk@mit.edu" target=3D"_blank">kaduk@mit.edu</a>&gt; wrote:<br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Greg,<br>
<br>
Also inline (though there&#39;s not much left to say)<br>
<br>
On Wed, Dec 16, 2020 at 12:17:55PM -0800, Greg Mirsky wrote:<br>
&gt; Hi Ben,<br>
&gt; thank you for the review, and your detailed comments and direct questi=
ons.<br>
&gt; Please find my answers and proposed updates in-lined below under the G=
IM&gt;&gt;<br>
&gt; tag.<br>
&gt; Attached, please find, the diff highlighting the updates and the new<b=
r>
&gt; working version of the draft.<br>
&gt; <br>
&gt; Regards,<br>
&gt; Greg<br>
&gt; <br>
&gt; On Mon, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker &lt;<br=
>
&gt; <a href=3D"mailto:noreply@ietf.org" target=3D"_blank">noreply@ietf.org=
</a>&gt; wrote:<br>
&gt; <br>
&gt; &gt; Benjamin Kaduk has entered the following ballot position for<br>
&gt; &gt; draft-ietf-bess-mvpn-fast-failover-13: Discuss<br>
&gt; &gt;<br>
&gt; &gt; When responding, please keep the subject line intact and reply to=
 all<br>
&gt; &gt; email addresses included in the To and CC lines. (Feel free to cu=
t this<br>
&gt; &gt; introductory paragraph, however.)<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; Please refer to <a href=3D"https://www.ietf.org/iesg/statement/di=
scuss-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.=
org/iesg/statement/discuss-criteria.html</a><br>
&gt; &gt; for more information about IESG DISCUSS and COMMENT positions.<br=
>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; The document, along with other ballot positions, can be found her=
e:<br>
&gt; &gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-=
fast-failover/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ie=
tf.org/doc/draft-ietf-bess-mvpn-fast-failover/</a><br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt; DISCUSS:<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt;<br>
&gt; &gt; Let&#39;s talk about what the requirements are for consistency ac=
ross PEs in<br>
&gt; &gt; the algorithm for selecting the Primary Upstream PE.=C2=A0 Sectio=
n 4 notes<br>
&gt; &gt; that &quot;all the PEs of that MVPN [are required] to follow the =
same UMH<br>
&gt; &gt; selection procedure&quot;, but leaves the option of non-revertive=
 behavior as<br>
&gt; &gt; something that &quot;MAY also be supported by an implementation&q=
uot;, without<br>
&gt; &gt; requirement for consistency across all PEs.=C2=A0 It seems to me =
that if some<br>
&gt; &gt; PEs use non-revertive behavior and others do not, then they will<=
br>
&gt; &gt; disagree as to which PE is the Primary (or active) PE in some cas=
es,<br>
&gt; &gt; which seems to conflict with the initial guidance that all PEs ne=
eded to<br>
&gt; &gt; pick the same one.=C2=A0 Is it perhaps that the PEs need to agree=
 on which PE<br>
&gt; &gt; is to be advertised as Primary but not necessarily to actually be=
 using<br>
&gt; &gt; that one for traffic?=C2=A0 Or am I missing something?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for pointing out this inconsistency. I agree tha=
t the text<br>
&gt; needs some tightening. Below is the proposed update:<br>
&gt; OLD TEXT:<br>
&gt;=C2=A0 =C2=A0 Such behavior is referred to as<br>
&gt;=C2=A0 =C2=A0 &quot;revertive&quot; behavior and MUST be supported.=C2=
=A0 Non-revertive behavior<br>
&gt;=C2=A0 =C2=A0 refers to the behavior of continuing to select the backup=
 PE as the<br>
&gt;=C2=A0 =C2=A0 UMH even after the Primary has come up.=C2=A0 This non-re=
vertive behavior<br>
&gt;=C2=A0 =C2=A0 MAY also be supported by an implementation and would be e=
nabled<br>
&gt;=C2=A0 =C2=A0 through some configuration.<br>
&gt; NEW TEXT:<br>
&gt; Such behavior is referred to as<br>
&gt;=C2=A0 =C2=A0 &quot;revertive&quot; behavior and MUST be supported.=C2=
=A0 Non-revertive behavior<br>
&gt;=C2=A0 =C2=A0 refers to the behavior of continuing to select the backup=
 PE as the<br>
&gt;=C2=A0 =C2=A0 UMH even after the Primary has come up.=C2=A0 This non-re=
vertive behavior<br>
&gt;=C2=A0 =C2=A0 MAY also be supported by an implementation and would be e=
nabled<br>
&gt;=C2=A0 =C2=A0 through some configuration.=C2=A0 Selection of the behavi=
or, revertive or<br>
&gt;=C2=A0 =C2=A0 non-revertive, is an operational issue, but it MUST be co=
nsistent on<br>
&gt;=C2=A0 =C2=A0 all PEs in the given MVPN.<br>
<br>
Looks good; I&#39;m glad this was just a simple change.<br>
<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt; COMMENT:<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt;<br>
&gt; &gt; Section 1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 3 describes local procedures allowing an egr=
ess PE (a PE<br>
&gt; &gt;=C2=A0 =C2=A0 connected to a receiver site) to take into account t=
he status of<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnels to determine the Upstream Multicast Hop (U=
MH) for a given<br>
&gt; &gt;=C2=A0 =C2=A0 (C-S, C-G).=C2=A0 [...]<br>
&gt; &gt;<br>
&gt; &gt; Does it also apply to (C-*, C-G)?=C2=A0 (I&#39;ll just mention it=
 once, but the<br>
&gt; &gt; handling seems to be somewhat inconsistent throughout the documen=
t, with<br>
&gt; &gt; (C-*,C-G) getting mentioned sometimes but not always, and no patt=
ern<br>
&gt; &gt; obvious to me for when it is or is not included.=C2=A0 I think I =
see some<br>
&gt; &gt; instances where (C-*, C-G) does not make sense, so it would proba=
bly not<br>
&gt; &gt; be a universal replacement.)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Yes, it cannot be used interchangeably. We&#39;ve followed=
 the notation<br>
&gt; as defined in the last paragraph of Section 3.1 RFC 6513:<br>
&gt;=C2=A0 =C2=A0 ... C-group address would be a group address in a<br>
&gt;=C2=A0 =C2=A0 VPN&#39;s address space.=C2=A0 A C-tree is a multicast di=
stribution tree<br>
&gt;=C2=A0 =C2=A0 constructed and maintained by the PIM C-instances.=C2=A0 =
A C-flow is a<br>
&gt;=C2=A0 =C2=A0 stream of multicast packets with a common C-source addres=
s and a<br>
&gt;=C2=A0 =C2=A0 common C-group address.=C2=A0 We will use the notation &q=
uot;(C-S,C-G)&quot; to<br>
&gt;=C2=A0 =C2=A0 identify specific C-flows.=C2=A0 If a particular C-tree i=
s a shared tree<br>
&gt;=C2=A0 =C2=A0 (whether unidirectional or bidirectional) rather than a s=
ource-<br>
&gt;=C2=A0 =C2=A0 specific tree, we will sometimes speak of the entire set =
of flows<br>
&gt;=C2=A0 =C2=A0 traveling that tree, identifying the set as &quot;(C-*,C-=
G)&quot;.<br>
&gt; It is my understanding, that the one reference to (C-*,C-G) in the dra=
ft is<br>
&gt; in Section 3 bullet B:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The S-PMSI can be advertised o=
nly after the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Upstream PE receives a C-multi=
cast route for (C-S, C-G)/(C-*,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0C-G) to be carried over the ad=
vertised S-PMSI.<br>
&gt; The reference is not an introduced text but an informational summary o=
f<br>
&gt; Section 5.1 RFC 6513. The text preceding that reference is intended to=
<br>
&gt; clarify its status:<br>
&gt;=C2=A0 =C2=A0There are three options specified in Section 5.1 of [RFC65=
13] for a<br>
&gt;=C2=A0 =C2=A0 downstream PE to select an Upstream PE.<br>
&gt; Would you suggest an additional text?<br>
<br>
I don&#39;t see a need for additional text.=C2=A0 Thanks for walking me thr=
ough it<br>
-- I&#39;m pretty sure I had lost track of the fact that the =C2=A73 (and o=
nly)<br>
occurrence of &quot;(C-*, C-G)&quot; was in a part that was supposed to be<=
br>
summarizing RFC 6513 by the time I stumbled upon it.=C2=A0 With the extra<b=
r>
context it all seems clear.<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 5 describes a &quot;hot leaf standby&quot; m=
echanism that can be used<br>
&gt; &gt;=C2=A0 =C2=A0 to improve failover time in MVPN.=C2=A0 The approach=
 combines mechanisms<br>
&gt; &gt;=C2=A0 =C2=A0 defined in Section 3 and Section 4 has similarities =
with the solution<br>
&gt; &gt;=C2=A0 =C2=A0 described in [RFC7431] to improve failover times whe=
n PIM routing is<br>
&gt; &gt;=C2=A0 =C2=A0 used in a network given some topology and metric con=
straints.<br>
&gt; &gt;<br>
&gt; &gt; nit: grammar issue around &quot;has similarities with&quot; (mayb=
e needs a leading<br>
&gt; &gt; &quot;and&quot;?)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you. Updated to:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 Section 5 describes a &quot;hot leaf standby&quot; mechan=
ism that can be used<br>
&gt;=C2=A0 =C2=A0 to improve failover time in MVPN.=C2=A0 The approach comb=
ines mechanisms<br>
&gt;=C2=A0 =C2=A0 defined in Section 3 and Section 4, and has similarities =
with the<br>
&gt;=C2=A0 =C2=A0 solution described in [RFC7431] to improve failover times=
 when PIM<br>
&gt;=C2=A0 =C2=A0 routing is used in a network given some topology and metr=
ic<br>
&gt;=C2=A0 =C2=A0 constraints.<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 VPNs.=C2=A0 An operator would enable these mechanism=
s using a method<br>
&gt; &gt;=C2=A0 =C2=A0 discussed in Section 3 in combination with the redun=
dancy provided by<br>
&gt; &gt;=C2=A0 =C2=A0 a standby PE connected to the source of the multicas=
t flow, and it is<br>
&gt; &gt;=C2=A0 =C2=A0 assumed that all PEs in the network would support th=
ese mechanisms<br>
&gt; &gt;=C2=A0 =C2=A0 for the procedures to work.=C2=A0 In the case that a=
 BGP implementation<br>
&gt; &gt;<br>
&gt; &gt; Is it a matter of &quot;the procedure will not work at all unless=
 all PEs in<br>
&gt; &gt; the network support it&quot;, or &quot;only the PEs that support =
it will get the<br>
&gt; &gt; benefits of it&quot;?=C2=A0 [The next sentence suggests an anwer.=
..]<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; The sentence might be too long. Yes, only PEs that support=
 the new<br>
&gt; Standby PE community and use any of UMH monitoring methods would conve=
rge<br>
&gt; faster than PEs that don&#39;t support both features. Would the re-wor=
ding as<br>
&gt; below make the text clear:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 An operator would enable these mechanisms using a method<=
br>
&gt;=C2=A0 =C2=A0 discussed in Section 3 combined with the redundancy provi=
ded by a<br>
&gt;=C2=A0 =C2=A0 standby PE connected to the multicast flow source.=C2=A0 =
PEs that support<br>
&gt;=C2=A0 =C2=A0 these mechanisms would converge faster and thus provide a=
 more stable<br>
&gt;=C2=A0 =C2=A0 multicast service.<br>
<br>
Yes, that looks pretty crisp -- thanks!<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 3<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 9.1.1 of [RFC6513] are applicable when using=
 I-PMSI<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnels.=C2=A0 That document is a foundation for t=
his document, and its<br>
&gt; &gt;=C2=A0 =C2=A0 processes all apply here.=C2=A0 Section 9.1.1 mandat=
es the use of specific<br>
&gt; &gt;=C2=A0 =C2=A0 procedures for sending intra-AS I-PMSI A-D Routes.<b=
r>
&gt; &gt;<br>
&gt; &gt; (nit) the second &quot;Section 9.1.1&quot; is also referring to R=
FC 6513, not this<br>
&gt; &gt; document, which would be the default interpretation of a bare sec=
tion<br>
&gt; &gt; reference.<br>
&gt; <br>
&gt; <br>
&gt; &gt; (not-nit) The referenced procedure seems to be about processing, =
not<br>
&gt; &gt; sending, intra-AS I-PMSI A-D routes.=C2=A0 Am I misreading someth=
ing?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; You are right. The sentence mischaracterizes Section 9.1.1=
 and has no<br>
&gt; informational value. Removed it altogether.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Different factors can be considered to determine the=
 &quot;status&quot; of a<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnel and are described in the following sub-sect=
ions.=C2=A0 The<br>
&gt; &gt;=C2=A0 =C2=A0 optional procedures described in this section also h=
andle the case<br>
&gt; &gt;=C2=A0 =C2=A0 the downstream PEs do not all apply the same rules t=
o define what the<br>
&gt; &gt;=C2=A0 =C2=A0 status of a P-tunnel is (please see Section 6), and =
some of them will<br>
&gt; &gt;=C2=A0 =C2=A0 produce a result that may be different for different=
 downstream PEs.<br>
&gt; &gt;<br>
&gt; &gt; nit: I think it&#39;s better to put a word like &quot;where&quot;=
 in &quot;the case the<br>
&gt; &gt; downtream PEs&quot;.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I&#39;ve tried it like the following:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The<br>
&gt;=C2=A0 =C2=A0 optional procedures described in this section also handle=
 the case<br>
&gt;=C2=A0 =C2=A0 when the downstream PEs do not all apply the same rules t=
o define<br>
&gt;=C2=A0 =C2=A0 what the status of a P-tunnel is (please see Section 6), =
and some of<br>
&gt;=C2=A0 =C2=A0 them will produce a result that may be different for diff=
erent<br>
&gt;=C2=A0 =C2=A0 downstream PEs.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.3<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 corresponding P-tunnel MUST be re-evaluated.=C2=A0 I=
f the P-tunnel<br>
&gt; &gt;=C2=A0 =C2=A0 transitions from Up to Down state, the Upstream PE t=
hat is the<br>
&gt; &gt;=C2=A0 =C2=A0 ingress of the P-tunnel MUST NOT be considered a val=
id UMH.<br>
&gt; &gt;<br>
&gt; &gt; (nit?) I&#39;m not sure how much precedent there is for using &qu=
ot;valid&quot; in<br>
&gt; &gt; this context -- IIUC the previous discussion of this process refe=
rred<br>
&gt; &gt; only to whether a PE is a candidate for being the UMH.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I agree, &quot;candidate&quot; is missing here. Proposed u=
pdate:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 If the P-tunnel<br>
&gt;=C2=A0 =C2=A0 transitions from Up to Down state, the Upstream PE that i=
s the<br>
&gt;=C2=A0 =C2=A0 ingress of the P-tunnel MUST NOT be considered as a valid=
 candidate<br>
&gt;=C2=A0 =C2=A0 UMH.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.5<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 When such a procedure is used, in the context where =
fast restoration<br>
&gt; &gt;=C2=A0 =C2=A0 mechanisms are used for the P-tunnels, a configurabl=
e timer MUST be<br>
&gt; &gt;=C2=A0 =C2=A0 set on the downstream PE to wait before updating the=
 UMH, to let the<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnel restoration mechanism to execute its action=
s.=C2=A0 An<br>
&gt; &gt;=C2=A0 =C2=A0 implementation SHOULD use three seconds as the defau=
lt value for this<br>
&gt; &gt;=C2=A0 =C2=A0 timer.<br>
&gt; &gt;<br>
&gt; &gt; How does this interact with the value of the maximum inter-packet=
 time?<br>
&gt; &gt; Suppose that I know to expect at least one packet every ten secon=
ds.=C2=A0 Do<br>
&gt; &gt; I wait ten seconds after receiving the last packet and then anoth=
er<br>
&gt; &gt; three seconds, before engaging in an UMH change?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; This scenario is similar to the use of an active OAM detec=
ting a<br>
&gt; network failure. The role of the timer to trigger an action if a certa=
in<br>
&gt; number of packets have not arrived. Since the maximum inter-packet tim=
e is<br>
&gt; known, a downstream PE has an expectation of receiving a packet within=
 a<br>
&gt; time interval large than the maximum inter-packet interval. In practic=
e,<br>
&gt; the timer could be set three times the maximum inter-packet interval, =
so<br>
&gt; that it expires if three consecutive packets were not received. In the=
 case<br>
&gt; you&#39;ve described, I think that the timer must be set larger than 1=
0<br>
&gt; seconds, probably 30+ seconds. Would you suggest any additional text h=
ere?<br>
<br>
I think my uncertainty here is whether the 3 seconds default is intended to=
<br>
be the only waiting period or an additional waiting period after<br>
determining that the tunnel is &quot;probably down&quot; but before updatin=
g the UMH.<br>
(Looking at it again now, the latter is a bit of a strained<br>
interpretation.)=C2=A0 That said, your description here suggests that the<b=
r>
operative mechanism is to determine that the tunnel is probably down by<br>
passing a threshold number of packets that were expected but did not<br>
arrive, with some accomodation for jitter in the network if packets are<br>
supposed to be arriving very quickly so that &quot;just wait for 3 missed<b=
r>
packets&quot; isn&#39;t long enough to account for (e.g.) interrupt handlin=
g on a<br>
forwarder.=C2=A0 So the intended sentiment seems to be something like<br>
&quot;Determining that a tunnel is probably down by waiting for enough pack=
ets<br>
to fail to arrive as expected is a heuristic and operational matter that<br=
>
depends on the maximum inter-packet time.=C2=A0 A timeout of three seconds =
is a<br>
generally suitable default waiting period to ascertain that the tunnel is<b=
r>
down, though other values would be needed for atypical conditions.&quot;=C2=
=A0</blockquote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
I would not complain if you kept the original text, though.<br></blockquote=
><div>GIM2&gt;&gt; I much appreciate the consideration you gave to the docu=
ment and glad to use the suggested text.=C2=A0</div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 In cases where this mechanism is used in conjunction=
 with the method<br>
&gt; &gt;=C2=A0 =C2=A0 described in Section 5, no prior knowledge of the ra=
te of the<br>
&gt; &gt;=C2=A0 =C2=A0 multicast streams is required; downstream PEs can co=
mpare reception<br>
&gt; &gt;=C2=A0 =C2=A0 on the two P-tunnels to determine when one of them i=
s down.<br>
&gt; &gt;<br>
&gt; &gt; This feels a little underspecified; is there a reference or more<=
br>
&gt; &gt; guidance that we could give about turning a stream of received pa=
ckets<br>
&gt; &gt; on one tunnel into a maximum inter-packet time on another tunnel,=
<br>
&gt; &gt; supposedly carrying the same traffic?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I think that this text refers to 1+1 protection, i.e., Act=
ive-Active<br>
&gt; P-tunnels. In that scenario, the determination of the P-tunnel&#39;s s=
tate can<br>
&gt; be done by comparing it to the reception state of the other P-tunnel i=
n the<br>
&gt; redundancy group. But there might be corner cases, like a significant =
delay<br>
&gt; in one of P-tunnels, that may need consideration before recommending t=
his<br>
&gt; method. I don&#39;t think that it is in the scope of the document. Wou=
ld<br>
&gt; appending the paragraph with &quot;The detailed specification of this =
mechanism<br>
&gt; is outside the scope of this document&quot; be acceptable?<br>
<br>
I think my confusion stems from the first paragraph of the section seeming<=
br>
to emphasize the dependence on the &quot;maximum inter-packet time&quot;, b=
ut the<br>
best algorithm to use in the 1+1 case seems likely to be different (i.e.,<b=
r>
one that makes use of the full knowledge of the incoming packet<br>
distribution).=C2=A0 So my suggestion would be something more along the lin=
es of<br>
&quot;no prior knowledge of the rate or maximum inter-packet time on the<br=
>
multicast streams is required; downstream PEs can compare actual packet<br>
reception statistics on the two P-tunnels to determine when one of them is<=
br>
down&quot;.=C2=A0 (Adding a &quot;details are out of scope of the document&=
quot; to that would<br>
be fine, of course.)<br></blockquote><div>GIM2&gt;&gt; Thanks again for the=
 suggested text.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x">
<br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.6<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 one octet-long field of TLV&#39=
;s Type value (Section 7.3)<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 one octet-long field of the len=
gth of the Value field in octets<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 variable length Value field.<br=
>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0The length of a TLV MUST be multiple of=
 four octets.<br>
&gt; &gt;<br>
&gt; &gt; I assume this is the total length, not the value in the length fi=
eld?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Correct. Would the following update make it clearer?<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Figure 2 presents the Optional TLV format TL=
V that<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0consists of:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 Type - a one-octet-long field that c=
haracterizes the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 interpretation of the Value field (S=
ection 7.3)<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 Length - a one-octet-long field equa=
l to the length of the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Value field in octets<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 Value - a variable-length field.<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0The length of a TLV as a whole MUST be multi=
ple of four octets.<br>
<br>
Yes, that&#39;s more clear.=C2=A0 (But given Jeff and Alvaro&#39;s comments=
 maybe the<br>
whole thing will change anyway.)<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 The BFD Discriminator attribute MUST be considered m=
alformed if its<br>
&gt; &gt;=C2=A0 =C2=A0 length is not a non-zero multiple of four.=C2=A0 If =
the attribute<br>
&gt; &gt;=C2=A0 =C2=A0 considered malformed, the UPDATE message SHALL be ha=
ndled using the<br>
&gt; &gt;=C2=A0 =C2=A0 approach of Attribute Discard per [RFC7606].<br>
&gt; &gt;<br>
&gt; &gt; nit: s/attribute considered/attribute is considered/<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you! Updated text to:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The BFD Discriminator attribute MUST be considered malfor=
med if its<br>
&gt;=C2=A0 =C2=A0 length is not a non-zero multiple of four.=C2=A0 If the a=
ttribute is<br>
&gt;=C2=A0 =C2=A0 deemed to be malformed, the UPDATE message SHALL be handl=
ed using the<br>
&gt;=C2=A0 =C2=A0 approach of Attribute Discard per [RFC7606].<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.6.1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 MUST periodically transmit BFD Control packe=
ts over the x-PMSI<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0P-tunnel after the P-tunnel is consider=
ed established.=C2=A0 Note that<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the methods to declare a P-tunnel has b=
een established are outside<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the scope of this specification.<br>
&gt; &gt;<br>
&gt; &gt; Is there a good reference for how to choose the period of transmi=
ssion?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Not really. There are many factors that an operator should=
 consider<br>
&gt; when configuring the frequency of BFD packets on the MultipointHead sy=
stem.<br>
&gt; One of the aspects to keep in mind is that unlike p2p BFD, there&#39;s=
 no<br>
&gt; interval negotiation phase in p2mp BFD. As a result, a tail has no<br>
&gt; influence over the interval at which the head of the p2mp BFD session<=
br>
&gt; transmits BFD Control messages.<br>
<br>
Okay.=C2=A0 (Yes, I do remember there was a fair bit of contention in the<b=
r>
reviews of the multipoint BFD document relating to the transmission<br>
frequency and the potential to overload the network in the absence of<br>
feedback ... luckily that was a case where I was able to sit back and<br>
watch, and not have to be taking a position.)<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 If the tracking of the P-tunnel by using a P2MP BFD =
session is<br>
&gt; &gt;=C2=A0 =C2=A0 enabled after the x-PMSI A-D Route has been already =
advertised, the<br>
&gt; &gt;=C2=A0 =C2=A0 x-PMSI A-D Route MUST be re-sent with precisely the =
same attributes<br>
&gt; &gt;=C2=A0 =C2=A0 as before and the BFD Discriminator attribute includ=
ed.<br>
&gt; &gt;<br>
&gt; &gt; Pedantically, it seems like &quot;precisely the same attributes a=
s before&quot;<br>
&gt; &gt; is incompatible with adding the BFD Discriminator attribute.=C2=
=A0 Phrasing<br>
&gt; &gt; that discusses &quot;the only change between the previous adverti=
sement and<br>
&gt; &gt; the new advertisement&quot; would not suffer from such a potentia=
l issue.<br>
&gt; &gt; (And similarly for when the BFD Discriminator attribute is to be<=
br>
&gt; &gt; removed, a couple paragraphs later.)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Great, thank you. Applied in both cases:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 If the tracking of the P-tunnel by using a P2MP BFD sessi=
on is<br>
&gt;=C2=A0 =C2=A0 enabled after the x-PMSI A-D Route has been already adver=
tised, the<br>
&gt;=C2=A0 =C2=A0 x-PMSI A-D Route MUST be re-sent with the only change bet=
ween the<br>
&gt;=C2=A0 =C2=A0 previous advertisement and the new advertisement to be th=
e inclusion<br>
&gt;=C2=A0 =C2=A0 of the BFD Discriminator attribute.<br>
&gt; and<br>
&gt;=C2=A0 =C2=A0 o=C2=A0 x-PMSI A-D Route MUST be re-sent with the only ch=
ange between the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0previous advertisement and the new advertise=
ment be the exclusion<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0of the BFD Discriminator attribute;<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.6.2<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 MUST use the source IP address of the BFD Co=
ntrol packet, the<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0value of the BFD Discriminator field, a=
nd the x-PMSI Tunnel<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Identifier [RFC6514] the BFD Control pa=
cket was received to<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0properly demultiplex BFD sessions.<br>
&gt; &gt;<br>
&gt; &gt; nit: missing word around &quot;the BFD Control packet was receive=
d&quot; (maybe<br>
&gt; &gt; &quot;received on/in&quot;?).<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; &quot;on&quot; seems the better option. Updated accordingl=
y.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 According to [RFC8562], if the downstream PE receive=
s Down or<br>
&gt; &gt;=C2=A0 =C2=A0 AdminDown in the State field of the BFD Control pack=
et or associated<br>
&gt; &gt;=C2=A0 =C2=A0 with the BFD session Detection Timer expires, the BF=
D session is<br>
&gt; &gt;<br>
&gt; &gt; nit: &quot;the BFD Detection Timer associated with the BFD sessio=
n expires&quot;<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for the helpful suggestion. Updated.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 PE, while others are considered as Standby Upstream =
PEs.=C2=A0 In such a<br>
&gt; &gt;=C2=A0 =C2=A0 scenario, when the P-tunnel is considered down, the =
downstream PE MAY<br>
&gt; &gt;=C2=A0 =C2=A0 initiate a switchover of the traffic from the Primar=
y Upstream PE to<br>
&gt; &gt;=C2=A0 =C2=A0 the Standby Upstream PE only if the Standby Upstream=
 PE is deemed<br>
&gt; &gt;=C2=A0 =C2=A0 available.<br>
&gt; &gt;<br>
&gt; &gt; I&#39;m not sure that we&#39;ve defined what it means for an Upst=
ream PE to be<br>
&gt; &gt; deemed &quot;available&#39;, yet.=C2=A0 I guess it&#39;s possible=
 that there is not an<br>
&gt; &gt; established P-Tunnel between the (selected) Standby Upstream PE a=
nd the<br>
&gt; &gt; donstream PE, so just using the Up/Down/not-known-to-be-Down stat=
us of<br>
&gt; &gt; that P-tunnel is not an option...<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; The wording is sloppy, agree. I think that the intention w=
as to say<br>
&gt; &quot;deemed in the Up state&quot;. That can be determined using the p=
2mp BFD session<br>
&gt; with Standby Upstream PE acting as its MultipointHead. The proposed up=
date<br>
&gt; is as follows:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 In such a scenario, when the P-tunnel is considered<br>
&gt;=C2=A0 =C2=A0 down, the downstream PE MAY initiate a switchover of the =
traffic from<br>
&gt;=C2=A0 =C2=A0 the Primary Upstream PE to the Standby Upstream PE only i=
f the<br>
&gt;=C2=A0 =C2=A0 Standby Upstream PE is deemed to be in the Up state.=C2=
=A0 That MAY be<br>
&gt;=C2=A0 =C2=A0 determined from the state of a P2MP BFD session with the =
Standby<br>
&gt;=C2=A0 =C2=A0 Upstream PE as the MultipointHead.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 If the downstream PE&#39;s P-tunnel is already estab=
lished when the<br>
&gt; &gt;=C2=A0 =C2=A0 downstream PE receives the new x-PMSI A-D Route with=
 BFD<br>
&gt; &gt;=C2=A0 =C2=A0 Discriminator attribute, the downstream PE MUST asso=
ciate the value<br>
&gt; &gt;=C2=A0 =C2=A0 of BFD Discriminator field with the P-tunnel and fol=
low procedures<br>
&gt; &gt;=C2=A0 =C2=A0 listed above in this section if and only if the x-PM=
SI A-D Route was<br>
&gt; &gt;=C2=A0 =C2=A0 properly processed as per [RFC6514], and the BFD Dis=
criminator<br>
&gt; &gt;=C2=A0 =C2=A0 attribute was validated.<br>
&gt; &gt;<br>
&gt; &gt; We did not discuss any validation of the BFD Discriminator attrib=
ute in<br>
&gt; &gt; =C2=A73.1.6; what procedures would this process entail?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; There&#39;s, so far, only one validation condition:<br>
&gt; <br>
&gt; The length of a TLV as a whole MUST be multiple of four octets.<br>
&gt; <br>
&gt; <br>
&gt; &gt; Section 4<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 The procedures described below are limited to the ca=
se where the site<br>
&gt; &gt;=C2=A0 =C2=A0 that contains C-S is connected to two or more PEs, t=
hough, to<br>
&gt; &gt;=C2=A0 =C2=A0 simplify the description, the case of dual-homing is=
 described.=C2=A0 The<br>
&gt; &gt;<br>
&gt; &gt; I suggest giving at least some considerations to how to choose be=
tween<br>
&gt; &gt; multiple standby Upstream PEs when there are more than one availa=
ble.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I understand your idea but that might be a whole new speci=
fication<br>
&gt; similar to the selection of UMH from the list of candidates. Perhaps<b=
r>
&gt; stating that the selection might use known methods but the specifics a=
re<br>
&gt; outside the scope of this document be acceptable? For example (sorry f=
or a<br>
&gt; longer quote):<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The procedures described below are limited to the case wh=
ere the site<br>
&gt;=C2=A0 =C2=A0 that contains C-S is connected to two or more PEs, though=
, to<br>
&gt;=C2=A0 =C2=A0 simplify the description, the case of dual-homing is desc=
ribed.=C2=A0 In<br>
&gt;=C2=A0 =C2=A0 the case where more than two PEs are connected to the C-s=
 site,<br>
&gt;=C2=A0 =C2=A0 selection of the Standby PE can be performed using one of=
 the methods<br>
&gt;=C2=A0 =C2=A0 of selecting a UMH.=C2=A0 Details of the selection are ou=
tside the scope<br>
&gt;=C2=A0 =C2=A0 of this document.=C2=A0 The procedures require all the PE=
s of that MVPN to<br>
&gt;=C2=A0 =C2=A0 follow the same UMH selection procedure, as specified in =
[RFC6513],<br>
&gt;=C2=A0 =C2=A0 whether the PE selected based on its IP address, hashing =
algorithm<br>
&gt;=C2=A0 =C2=A0 described in section 5.1.3 of [RFC6513], or Installed UMH=
 Route.=C2=A0 The<br>
&gt;=C2=A0 =C2=A0 procedures assume that if a site of a given MVPN that con=
tains C-S is<br>
&gt;=C2=A0 =C2=A0 dual-homed to two PEs, then all the other sites of that M=
VPN would<br>
&gt;=C2=A0 =C2=A0 have two unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S=
, each with<br>
&gt;=C2=A0 =C2=A0 its RD.<br>
<br>
I can understand that selecting from a list of (more than two) candidates<b=
r>
might end up being complicated; I think your text here is sufficient to<br>
address my concern, by giving some indication of how the extension to the<b=
r>
general case could be performed while acknowledging that it is not fully<br=
>
specified yet.<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 procedures require all the PEs of that MVPN to follo=
w the same UMH<br>
&gt; &gt;=C2=A0 =C2=A0 selection procedure, as specified in [RFC6513], whet=
her the PE<br>
&gt; &gt;=C2=A0 =C2=A0 selected based on its IP address, hashing algorithm =
described in<br>
&gt; &gt;=C2=A0 =C2=A0 section 5.1.3 of [RFC6513], or Installed UMH Route.=
=C2=A0 The procedures<br>
&gt; &gt;<br>
&gt; &gt; I assume that how the PEs agree on which procedure is in use does=
 not<br>
&gt; &gt; involve something being advertised in-band, and is out of scope f=
or this<br>
&gt; &gt; document.=C2=A0 But please say so!<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; You are right, that is an operational issue and the manage=
ment<br>
&gt; plane&#39;s responsibility.<br>
&gt; NEW TEXT:<br>
&gt; The procedures require all the PEs of that MVPN to<br>
&gt;=C2=A0 =C2=A0 follow the same UMH selection procedure, as specified in =
[RFC6513],<br>
&gt;=C2=A0 =C2=A0 whether the PE selected based on its IP address, the hash=
ing<br>
&gt;=C2=A0 =C2=A0 algorithm described in section 5.1.3 of [RFC6513], or Ins=
talled UMH<br>
&gt;=C2=A0 =C2=A0 Route.=C2=A0 The consistency of the UMH selection method =
used among all<br>
&gt;=C2=A0 =C2=A0 PEs is expected to be provided by the management plane.<b=
r>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 assume that if a site of a given MVPN that contains =
C-S is dual-homed<br>
&gt; &gt;=C2=A0 =C2=A0 to two PEs, then all the other sites of that MVPN wo=
uld have two<br>
&gt; &gt;=C2=A0 =C2=A0 unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, ea=
ch with its RD.<br>
&gt; &gt;<br>
&gt; &gt; nit: s/its RD/its own RD/<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Ack<br>
&gt; <br>
&gt; &gt; Also, please confirm that the unicast routes are *to* C-S, vs *fr=
om* it.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Though it might be somewhat counterintuitive, in the conte=
xt of MVPN<br>
&gt; &quot;to&quot; is correct.<br>
<br>
Thanks.<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 4.1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 the NLRI is constructed as the C-multicast r=
oute with an RT that<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0identifies the Primary Upstream PE, exc=
ept that the RD is the same<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0as if the C-multicast route was built u=
sing the Standby Upstream<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0PE as the UMH (it will carry the RD ass=
ociated to the unicast VPN<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0route advertised by the Standby Upstrea=
m PE for S and a Route<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Target derived from the Standby Upstrea=
m PE&#39;s UMH route&#39;s VRF RT<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Import EC);<br>
&gt; &gt;<br>
&gt; &gt; This part is a bit confusing to me, since the first part says tha=
t the<br>
&gt; &gt; RT identifies the Primary Upstream PE, but the second part says t=
hat the<br>
&gt; &gt; RT is derived from the Standy Upstream PE&#39;s [stuff].=C2=A0 Bu=
t I&#39;m happy to<br>
&gt; &gt; trust you that the [stuff] makes it correct!<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for putting your trust in our collective thinkin=
g. AFAIK,<br>
&gt; it works.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 4.2<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0when the PE determines (the use of the =
particular method to detect<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the failure is outside the scope of thi=
s document) that C-S is not<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0reachable through some other PE, the PE=
 SHOULD install VRF PIM<br>
&gt; &gt;<br>
&gt; &gt; It seems like a forward reference to =C2=A74.3 might be helpful.<=
br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for your suggestion, the reference is added in t=
he working<br>
&gt; version.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 9.3.2 of [RFC6514], describes the procedures=
 of sending a<br>
&gt; &gt;=C2=A0 =C2=A0 Source-Active A-D Route as a result of receiving the=
 C-multicast<br>
&gt; &gt;=C2=A0 =C2=A0 route.=C2=A0 These procedures MUST be followed for b=
oth the normal and<br>
&gt; &gt;=C2=A0 =C2=A0 Standby C-multicast routes.<br>
&gt; &gt;<br>
&gt; &gt; There is no section 9.3.2 in RFC 6514.=C2=A0 There is a 9.2.3 tha=
t looks<br>
&gt; &gt; perhaps plausible, though the string &quot;Source-Active&quot; do=
es not appear in<br>
&gt; &gt; it.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Great catch, thank you! I believe that the correct section=
 is in RFC<br>
&gt; 6513, not RFC 6514. The former opens with:<br>
&gt;=C2=A0 =C2=A0 The issue described in Section 9.3.1 is resolved through =
the use of<br>
&gt;=C2=A0 =C2=A0 Source Active A-D routes.=C2=A0 In the remainder this sec=
tion, we provide<br>
&gt;=C2=A0 =C2=A0 an example of how this works, along with an informal desc=
ription of<br>
&gt;=C2=A0 =C2=A0 the procedures.<br>
&gt; Would you agree RFC 6513 makes sense?<br>
<br>
That does look to make a lot more sense than 6514 did!<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 4.4.2<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Source AS carried in the C-multicast route.=C2=A0 If=
 the match is found,<br>
&gt; &gt;=C2=A0 =C2=A0 and the C-multicast route carries the Standby PE BGP=
 Community, then<br>
&gt; &gt;=C2=A0 =C2=A0 the ASBR MUST perform as follows:<br>
&gt; &gt;<br>
&gt; &gt; (I assume that there is room for local policy to modify this &quo=
t;MUST&quot;,<br>
&gt; &gt; e.g., if needed to protect against some form of attack ... perhap=
s it<br>
&gt; &gt; even goes without saying.)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Indeed. Perhaps the following change makes it more accurat=
e:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 If the match is found,<br>
&gt;=C2=A0 =C2=A0 and the C-multicast route carries the Standby PE BGP Comm=
unity, then<br>
&gt;=C2=A0 =C2=A0 the ASBR implementation that supports this specification =
MUST be<br>
&gt;=C2=A0 =C2=A0 configurable to perform as follows:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 o=C2=A0 if the route was received over iBGP and its LOCAL=
_PREF attribute<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0is set to zero, then it MUST be re-advertise=
d in eBGP with a MED<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0attribute (MULTI_EXIT_DISC) set to the highe=
st possible value<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0(0xffff)<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 o=C2=A0 if the route was received over eBGP and its MED a=
ttribute set to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A00xffff, then it MUST be re-advertised in iBG=
P with a LOCAL_PREF<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0attribute set to zero<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 Other ASBR procedures are applied without modification an=
d, when<br>
&gt;=C2=A0 =C2=A0 applied, MAY modify the above-listed behavior.<br>
<br>
Works for me :)<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 5<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 Upstream PEs use the &quot;hot standby&quot;=
 optional behavior and thus will<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0forward traffic for a given multicast s=
tate as soon as they have<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0whether a (primary) BGP C-multicast rou=
te or a Standby BGP<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0C-multicast route for that state (or bo=
th)<br>
&gt; &gt;<br>
&gt; &gt; nit: the grammar is a bit weird here, after &quot;as soon as they=
 have&quot;; I&#39;m<br>
&gt; &gt; not confident that I could make an accurate suggestion for a fix.=
<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Would with a minor update it all reads better:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Upstream PEs use the &quot;hot standby&quot;=
 optional behavior and thus will<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0start forwarding traffic for a given multica=
st state after they<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0have whether a (primary) BGP C-multicast rou=
te or a Standby BGP<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0C-multicast route for that state (or both)<b=
r>
<br>
I think that &quot;whether&quot; is not needed (though &quot;either&quot; m=
ight work in its<br>
stead).<br></blockquote><div>GIM2&gt;&gt; Yes, it was not the best choice. =
Below is the newest version:</div><div>=C2=A0 =C2=A0 o =C2=A0Upstream PEs u=
se the &quot;hot standby&quot; optional behavior and thus will</div>=C2=A0 =
=C2=A0 =C2=A0 start forwarding traffic for a given multicast state after th=
ey<br>=C2=A0 =C2=A0 =C2=A0 have a (primary) BGP C-multicast route or a Stan=
dby BGP<br>=C2=A0 =C2=A0 =C2=A0 C-multicast route for that state (or both)<=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
&gt; &gt;<br>
&gt; &gt; Section 6<br>
&gt; &gt;<br>
&gt; &gt; I could almost see the discussion of duplicate packets as being a=
<br>
&gt; &gt; subsection of the security considerations, though I don&#39;t min=
d leaving<br>
&gt; &gt; it as-is.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for agreeing.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 8<br>
&gt; &gt;<br>
&gt; &gt; We could perhaps make some pro forma note that the BFD Discrimina=
tor<br>
&gt; &gt; attribute, like all BGP attributes, typically does not benefit fr=
om<br>
&gt; &gt; cryptographic integrity protection and thus could be spoofed so a=
s to be<br>
&gt; &gt; different than what is actually used by the multipoint BFD head.=
=C2=A0 That<br>
&gt; &gt; said, I&#39;m willing to let this fall under the incorporated-by-=
reference<br>
&gt; &gt; BGP security considerations.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Is it worth noting that operating in &quot;hot&quot; standby mode=
 will increase<br>
&gt; &gt; the general level of traffic on the VPN and thus susceptibility t=
o DoS?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; We use hot standby in the control plane only. That would a=
dd some BGP<br>
&gt; traffic but would not as much as 1+1 protection in the data plane. I t=
hink<br>
&gt; that the amount of the additional load in the VPN with the &quot;hot s=
tandby&quot;<br>
&gt; defined in the draft unlikely to make PEs more volnurable to DoS. What=
 do<br>
&gt; you think?<br>
<br>
I think I was assuming this was &quot;hot&quot; in the data plane as well a=
s the<br>
control plane, when I Wrote the comment.=C2=A0 For just the control plane, =
your<br>
assessment seems reasonable.<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 This document uses P2MP BFD, as defined in [RFC8562]=
, which, in turn,<br>
&gt; &gt;=C2=A0 =C2=A0 is based on [RFC5880].=C2=A0 Security considerations=
 relevant to each<br>
&gt; &gt;=C2=A0 =C2=A0 protocol are discussed in the respective protocol sp=
ecifications.=C2=A0 An<br>
&gt; &gt;=C2=A0 =C2=A0 implementation that supports this specification MUST=
 use a mechanism<br>
&gt; &gt;=C2=A0 =C2=A0 to control the maximum number of P2MP BFD sessions t=
hat can be active<br>
&gt; &gt;=C2=A0 =C2=A0 at the same time.<br>
&gt; &gt;<br>
&gt; &gt; What is the objective that this control is designed to achieve?=
=C2=A0 I can<br>
&gt; &gt; &quot;control the maximum number of sessions&quot; by asserting t=
he maximum number<br>
&gt; &gt; to be an absurdly large value, but I don&#39;t think that would m=
eet the<br>
&gt; &gt; spirit of this requirement (it does meet the letter of the requir=
ement).<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Though this recommendation may look as too vague, I think =
it is<br>
&gt; helpful to a developer. I imagine, as we&#39;ve discussed in regard to=
 the<br>
&gt; selection of the interval between BFD Control packets, an operator wil=
l<br>
&gt; consider the overall load of BFD Control packets across all active BFD=
<br>
&gt; sessions. Do you think that a sentence that connects the number of p2m=
p BFD<br>
&gt; sessions and the rate of BFD Control packets be helpful in this contex=
t?<br>
<br>
Or even another clause, maybe something like &quot;to limit the overall amo=
unt<br>
of capacity used by the BFD traffic&quot;.=C2=A0 (I think part of what trig=
gered my<br>
comment is that this is &quot;MUST use&quot;, not &quot;MUST provide&quot; =
-- the goal of a<br>
&quot;MUST provide&quot; is fairly obvious but &quot;MUST use&quot; with no=
 specific bound<br>
could be seen as make-work.)<br></blockquote><div>GIM2&gt;&gt; More thanks =
for this suggestion. I think that your clause is more general and better ex=
presses our concern in regard to the potential impact of using p2mp BFD. Be=
low is the new text I propose:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0This d=
ocument uses P2MP BFD, as defined in [RFC8562], which, in turn,<br>=C2=A0 =
=C2=A0is based on [RFC5880].=C2=A0 Security considerations relevant to each=
<br>=C2=A0 =C2=A0protocol are discussed in the respective protocol specific=
ations.=C2=A0 An<br>=C2=A0 =C2=A0implementation that supports this specific=
ation MUST provide a<br>=C2=A0 =C2=A0mechanism to limit the overall amount =
of capacity used by the BFD<br>=C2=A0 =C2=A0traffic (as the combination of =
the number of active P2MP BFD sessions<br><div>=C2=A0 =C2=A0and the rate of=
 BFD Control packets to process).=C2=A0</div><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204=
);padding-left:1ex">
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 The methods described in Section 3.1 may produce fal=
se-negative state<br>
&gt; &gt;=C2=A0 =C2=A0 changes that can be the trigger for an unnecessary c=
onvergence in the<br>
&gt; &gt;=C2=A0 =C2=A0 control plane, ultimately negatively impacting the m=
ulticast service<br>
&gt; &gt;=C2=A0 =C2=A0 provided by the VPN.=C2=A0 An operator is expected t=
o consider the network<br>
&gt; &gt;=C2=A0 =C2=A0 environment and use available controls of the mechan=
ism used to<br>
&gt; &gt;=C2=A0 =C2=A0 determine the status of a P-tunnel.<br>
&gt; &gt;<br>
&gt; &gt; We mentioned earlier (e.g., in =C2=A73.1) that similar negative e=
ffects can<br>
&gt; &gt; occur when resiliency mechanisms at different layers interact; th=
at<br>
&gt; &gt; might be worth repeating here.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; One of such references is in Section 3.1.2:<br>
&gt;=C2=A0 =C2=A0 In many cases, it is not practical to use both protection=
<br>
&gt;=C2=A0 =C2=A0 methods at the same time because uncorrelated timers migh=
t cause<br>
&gt;=C2=A0 =C2=A0 unnecessary switchovers and destabilize the network.<br>
&gt; Thus we referred to Section 3.1 as the encompassing reference to all<b=
r>
&gt; possible scenarios. Would you agree with that?<br>
<br>
Wow, that looks like a real short-term memory failure on my part (=C2=A73.1=
 was<br>
mentioned just in the previous sentence!).=C2=A0 Sorry for the noise; this =
is<br>
fine as-is.<br>
<br>
Thanks again,<br>
<br>
Ben<br>
</blockquote></div></div>

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From: "Murray S. Kucherawy" <superuser@gmail.com>
Date: Fri, 18 Dec 2020 18:49:45 -0800
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To: Greg Mirsky <gregimirsky@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Murray Kucherawy's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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Hi Greg,

Just to be clear, this is purely a suggestion on my part that might improve
the document.  It's not a DISCUSS, so you're not obligated to indulge my
suggestions unless you think they're a worthwhile improvement.

Yes, those all look good to me.  For the 4.2 changes, I might suggest a
slightly different presentation:

NEW:

When a PE supporting this specification receives a C-multicast route for a
particular (C-S, C-G) for which all of the following are true:

o the RT carried in the route results in importing the route into a
particular VRF on the PE;

o the route carries the Standby PE BGP Community; and

o the PE determines (via a method of failure detection that is outside the
scope of this document) that C-S is not reachable through some other PE
(more details are in Section 4.3),

then the PE MAY install VRF PIM state corresponding to this Standby BGP
C-multicast route (the result will be that a PIM Join message will be sent
to the CE towards C-S, and that the PE will receive (C-S, C-G) traffic),
and the PE MAY forward (C-S, C-G) traffic received by the PE to other PEs
through a P-tunnel rooted at the PE.

-MSK

--000000000000b1ad2205b6c84724
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Greg,</div><div dir=3D"ltr"><br></div>=
<div dir=3D"ltr">Just to be clear, this is purely a suggestion on my part t=
hat might improve the document.=C2=A0 It&#39;s not a DISCUSS, so you&#39;re=
 not obligated to indulge my suggestions unless you think they&#39;re a wor=
thwhile improvement.<br></div><div><br></div><div>Yes, those all look good =
to me.=C2=A0 For the 4.2 changes, I might suggest a slightly different pres=
entation:<br></div><div><br></div><div>NEW:<br><br></div><div>When a PE sup=
porting this specification receives a C-multicast route for a particular (C=
-S, C-G) for which all of the following are true:<br><br></div><div>o the R=
T carried in the route results in importing the route into a particular VRF=
 on the PE;<br><br></div><div>o the route carries the Standby PE BGP Commun=
ity; and<br><br></div><div>o the PE determines (via a method of failure det=
ection that is outside the scope of this document) that C-S is not reachabl=
e through some other PE (more details are in Section 4.3),<br><br></div><di=
v>then the PE MAY install VRF PIM state corresponding to this Standby BGP C=
-multicast route (the result will be that a PIM Join message will be sent t=
o the CE towards C-S, and that the PE will receive (C-S, C-G) traffic), and=
 the PE MAY forward (C-S, C-G) traffic received by the PE to other PEs thro=
ugh a P-tunnel rooted at the PE.<br></div><div><br></div><div>-MSK<br></div=
></div>

--000000000000b1ad2205b6c84724--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Fri, 18 Dec 2020 19:00:19 -0800
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To: "Murray S. Kucherawy" <superuser@gmail.com>
Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Murray Kucherawy's No Objection on draft-ietf-bess-mvpn-fast-failover-13: (with COMMENT)
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--0000000000008d04b705b6c86dbf
Content-Type: text/plain; charset="UTF-8"

Hi Murray,
I feel that our discussion and changes helped to make the document clearer,
improved it.
And I like the manner you've re-worked text in Section 4.2. I'll use it.

Regards,
Greg

On Fri, Dec 18, 2020 at 6:49 PM Murray S. Kucherawy <superuser@gmail.com>
wrote:

> Hi Greg,
>
> Just to be clear, this is purely a suggestion on my part that might
> improve the document.  It's not a DISCUSS, so you're not obligated to
> indulge my suggestions unless you think they're a worthwhile improvement.
>
> Yes, those all look good to me.  For the 4.2 changes, I might suggest a
> slightly different presentation:
>
> NEW:
>
> When a PE supporting this specification receives a C-multicast route for a
> particular (C-S, C-G) for which all of the following are true:
>
> o the RT carried in the route results in importing the route into a
> particular VRF on the PE;
>
> o the route carries the Standby PE BGP Community; and
>
> o the PE determines (via a method of failure detection that is outside the
> scope of this document) that C-S is not reachable through some other PE
> (more details are in Section 4.3),
>
> then the PE MAY install VRF PIM state corresponding to this Standby BGP
> C-multicast route (the result will be that a PIM Join message will be sent
> to the CE towards C-S, and that the PE will receive (C-S, C-G) traffic),
> and the PE MAY forward (C-S, C-G) traffic received by the PE to other PEs
> through a P-tunnel rooted at the PE.
>
> -MSK
>

--0000000000008d04b705b6c86dbf
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr">Hi Murray,<div>I feel that our discussion and changes help=
ed to make=C2=A0the document clearer, improved it.</div><div>And I like the=
 manner you&#39;ve re-worked text in Section 4.2. I&#39;ll use it.</div><di=
v><br></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail=
_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Dec 18, 2020 at 6:49 =
PM Murray S. Kucherawy &lt;<a href=3D"mailto:superuser@gmail.com">superuser=
@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex"><div dir=3D"ltr"><div dir=3D"ltr">Hi Greg,</div><div dir=3D"ltr"=
><br></div><div dir=3D"ltr">Just to be clear, this is purely a suggestion o=
n my part that might improve the document.=C2=A0 It&#39;s not a DISCUSS, so=
 you&#39;re not obligated to indulge my suggestions unless you think they&#=
39;re a worthwhile improvement.<br></div><div><br></div><div>Yes, those all=
 look good to me.=C2=A0 For the 4.2 changes, I might suggest a slightly dif=
ferent presentation:<br></div><div><br></div><div>NEW:<br><br></div><div>Wh=
en a PE supporting this specification receives a C-multicast route for a pa=
rticular (C-S, C-G) for which all of the following are true:<br><br></div><=
div>o the RT carried in the route results in importing the route into a par=
ticular VRF on the PE;<br><br></div><div>o the route carries the Standby PE=
 BGP Community; and<br><br></div><div>o the PE determines (via a method of =
failure detection that is outside the scope of this document) that C-S is n=
ot reachable through some other PE (more details are in Section 4.3),<br><b=
r></div><div>then the PE MAY install VRF PIM state corresponding to this St=
andby BGP C-multicast route (the result will be that a PIM Join message wil=
l be sent to the CE towards C-S, and that the PE will receive (C-S, C-G) tr=
affic), and the PE MAY forward (C-S, C-G) traffic received by the PE to oth=
er PEs through a P-tunnel rooted at the PE.<br></div><div><br></div><div>-M=
SK<br></div></div>
</blockquote></div>

--0000000000008d04b705b6c86dbf--


From nobody Sat Dec 19 04:13:51 2020
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-ipvpn-interworking-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

        Title           : EVPN Interworking with IPVPN
        Authors         : J. Rabadan
                          A. Sajassi
                          E. Rosen
                          J. Drake
                          W. Lin
                          J. Uttaro
                          A. Simpson
	Filename        : draft-ietf-bess-evpn-ipvpn-interworking-04.txt
	Pages           : 27
	Date            : 2020-12-19

Abstract:
   EVPN is used as a unified control plane for tenant network intra and
   inter-subnet forwarding.  When a tenant network spans not only EVPN
   domains but also domains where BGP VPN-IP or IP families provide
   inter-subnet forwarding, there is a need to specify the interworking
   aspects between BGP domains of type EVPN, VPN-IP and IP, so that the
   end to end tenant connectivity can be accomplished.  This document
   specifies how EVPN interworks with VPN-IPv4/VPN-IPv6 and IPv4/IPv6
   BGP families for inter-subnet forwarding.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-ipvpn-interworking/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-ipvpn-interworking-04
https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-ipvpn-interworking-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-ipvpn-interworking-04


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/YEVkMnIvICzus7RNfc2eGlDS0ew>
Subject: Re: [bess] draft-ietf-bess-evpn-ipvpn-interworking chair review
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Stephane, all

After a few discussions, we published rev 04, which addresses all the comme=
nts received, including Stephane=92s comments.
Please see in-line.

Thanks!
Jorge

From: Ali Sajassi (sajassi) <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Date: Monday, December 14, 2020 at 5:17 AM
To: Stephane Litkowski (slitkows) <slitkows@cisco.com<mailto:slitkows@cisco=
.com>>, draft-ietf-bess-evpn-ipvpn-interworking@ietf.org<mailto:draft-ietf-=
bess-evpn-ipvpn-interworking@ietf.org> <draft-ietf-bess-evpn-ipvpn-interwor=
king@ietf.org<mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org>>
Cc: bess@ietf.org<mailto:bess@ietf.org> <bess@ietf.org<mailto:bess@ietf.org=
>>, bess-chairs@ietf.org<mailto:bess-chairs@ietf.org> <bess-chairs@ietf.org=
<mailto:bess-chairs@ietf.org>>
Subject: Re: draft-ietf-bess-evpn-ipvpn-interworking chair review
Hi Stephane,

Jorge, John, DJ, and I met several times over the course of last two weeks =
to address DJ and some of the other outstanding comments and in doing so co=
vering the following three cases as well:

a)       Advertisements of routes learned over a local AC by a GW into the =
participating domains w/o a domain-path Attribute

b)      Advertisements of routes learned over a local AC by a GW into the p=
articipating domains w/ a domain-path Attribute that contains a new SAFI an=
d new a domain-id

c)       Advertisements of routes learned over a local AC by a GW into the =
participating domains w/ a domain-path Attribute that contains a new SAFI a=
nd one of the existing domain-id

Jorge is working hard to incorporate the new changes and by end of the week=
 he should have a new rev that address all the comments including yours bel=
ow.

Cheers,
Ali

From: "Stephane Litkowski (slitkows)" <slitkows@cisco.com<mailto:slitkows@c=
isco.com>>
Date: Friday, December 11, 2020 at 7:37 AM
To: "draft-ietf-bess-evpn-ipvpn-interworking@ietf.org<mailto:draft-ietf-bes=
s-evpn-ipvpn-interworking@ietf.org>" <draft-ietf-bess-evpn-ipvpn-interworki=
ng@ietf.org<mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>, "bess-chairs@ietf.org<mailto:bess-chairs@ietf.org>" <bess-chairs@ietf=
.org<mailto:bess-chairs@ietf.org>>
Subject: draft-ietf-bess-evpn-ipvpn-interworking chair review
Resent-From: <alias-bounces@ietf.org<mailto:alias-bounces@ietf.org>>
Resent-To: <jorge.rabadan@nokia.com<mailto:jorge.rabadan@nokia.com>>, Cisco=
 Employee <sajassi@cisco.com<mailto:sajassi@cisco.com>>, <erosen52@gmail.co=
m<mailto:erosen52@gmail.com>>, <jdrake@juniper.net<mailto:jdrake@juniper.ne=
t>>, <wlin@juniper.net<mailto:wlin@juniper.net>>, <ju1738@att.com<mailto:ju=
1738@att.com>>, <adam.1.simpson@nokia.com<mailto:adam.1.simpson@nokia.com>>
Resent-Date: Friday, December 11, 2020 at 7:35 AM

Hi Authors,


Please find below my chair review related to draft-ietf-bess-evpn-ipvpn-int=
erworking.

BTW, you need to refresh the draft now, it has expired.

Section 3:

=B7         Nit:
s/uniqueness of the DOMAIN- ID/uniqueness of the DOMAIN-ID/
[jorge] fixed, thx



=B7         a) I agree with DJ=92s comment on: =93This attribute list may c=
ontain zero, one or more segments". It is actually one or more.
[jorge] fixed, thx


=B7         The section 3 contains both normative and non-normative languag=
e. If section 3 is intended to detail the normative behavior of adding/modi=
fying D-PATH, it must use normative for any of the normative procedure. For=
 instance b) may require normative language. While it is very good to have =
an example in b), one or more clear normative rules are required before tal=
king about the example.
[jorge] ok, added more normative language.


=B7         b) talks about domain-ids attached to IP-VRF, this is fine. How=
ever, the text should provide a wider view so people don=92t think that thi=
s is the only option. Domain-Ids may be assigned at VRF level, but also at =
more a higher level (BGP peer), or even lower level (bgp community=85). We =
should not limit implementations here in the granularity domain-ids are def=
ined.
[jorge] check out the new text in (e)


=B7         c) I don=92t see why =93MUST NOT=94, it does not hurt to have a=
 DOMAIN-ID associated with non ISF world (routes learned from IGP, static)=
=85 there could be design where people do BGP one leg and non-BGP on the ot=
her leg. We should probably relax that.
[jorge] check out the new text in (c)

Would you mind adding a beautiful ASCII-ART for the attribute format ? It=
=92s usually good to have when reading to see the attribute format rather t=
han having to read the text.
[jorge] done


You need to define the error handling procedures for D-PATH as per RFC7606 =
(you should have it as normative ref too).
[jorge] done, check out the new text in (g)


Section 3.1
This sentence is misleading and does not match with the normative behavior =
of Section 3) d)

=93In general, any interworking PE that imports an ISF route MUST flag

   the route as "looped" if its D-PATH contains a <DOMAIN-ID:ISF_SAFI_TYPE>=
 segment, where DOMAIN-ID matches a local DOMAIN-ID

   in the tenant IP-VRF.=94

I don=92t see the value of this section beyond providing an example. The no=
rmative behavior is already given in Section 3) d). Can=92t the example be =
packed under d).
[jorge] ok, done.

Also the pointed sentence still refers to a DOMAIN-ID per VRF, which is not=
 good for a generic statement. My domain ID info could from the BGP peer co=
nfig. Again, this option of per VRF is fine, but this is not the only one t=
hat can be implemented.
[jorge] agreed. See new text.


Section 4.1:
I don=92t see why =93no-propagation-mode=94 is the default mode. This is br=
eaking existing propagation of attributes from SAFI 1 to SAFI 128. When we =
have a CE running BGP with a PE, the PE propagates the attributes (CTs, ASP=
ATH, MED=85) coming from the CE.
[jorge] the reason why it is the default mode is security (the security sec=
tion points out some risks of the propagation or attributes). In order to n=
ot break existing RFC4364 implementations we added this:
=93This is the default mode of operation for gateway PEs that re-export ISF=
 routes from any ISF SAFI into EVPN, and from EVPN into any other SAFI.=94 =
=96 since there is no other spec for EVPN interworking, we should be fine.

This section creates some ambiguity about the D-PATH attribute. Based on Se=
ction 3, D-PATH will be necessarily sent but received D-PATH may be dropped=
 and new one created but the text of section 4.1 makes me think that it=92s=
 not the case in no-propagation mode.
I think setting D-PATH is orthogonal to the attribute propagation.
As section 4.1 tells, people may still want to rely on existing SoO for ins=
tance in some case in this case D-PATH may not be added.
I think section 3 and 4.1 have to be more clear on the normative procedures=
 about D-PATH addition/modification.
[jorge] good point. I clarified section 3(b) - D-PATH MUST be added by the =
gateway PE as long as the gateway works in uniform-propagation-mode.

Section 4.2:
Isn=92t it dangerous to try to define which attributes needs to be propagat=
ed, and which one should not be ? We are always creating new attributes, sh=
ould people update this doc each time a new attribute comes ? I don=92t rea=
lly see how this could be managed.
[jorge] the reason is security again. We don=92t want to blindly propagate =
things across ISF domains. Only those things that help with best path selec=
tion. An example of things you don=92t want to simply blindly propagate is =
BGP tunnel encapsulation attributes, route-targets, EVPN communities, bgp p=
refix-sid attribute=85 by doing so, unexpected situations may happen. So ye=
s, we think future specs will need to say if ISF gateway PEs need to propag=
ate the new attribute or not.

Isn=92t there an indentation issue starting =93When propagating an ISD rout=
e to a different ISF SAFI=85=94 ?
[jorge] should be fixed now, thx

The considerations about ASPATH look really implementation details to me (a=
t least the way it is written). Basically the ASPATH propagation rules does=
n=92t change and the gateway function itself does not modify the ASPATH.

Similarly, for the IBGP-only path attributes, the word =93copy=94 looks rea=
lly implementation dependent. Why not telling that the advertised route sho=
uld keep the received iBGP-only attribute ?
[jorge] ok, I changed it with =93keep=94
You should also clarify considerations regarding rfc6368.
[jorge] not sure what you mean, would you suggest some text please?


Section 4.3:
Shouldn=92t we just follow existing aggregation rules of each attribute ? A=
gain, what happens when new attributes are coming in. I don=92t think that =
the gateway function has actually something to change in the aggregation pr=
ocess. Aggregation is happening in the VRF, there is no change compared to =
what is existing today, for VRF, it=92s just IP prefix aggregation.
[jorge] The aggregation per se is just IP aggregation, but the definition o=
f what to do with attributes on the aggregate is new, I think it needs to b=
e clearly specified.


However, as we are defining D-PATH, we can define aggregation rules related=
 to D-PATH.
[jorge] it is also included yes.



Section 5:


=93For a given prefix advertised in one or more non-EVPN ISF routes, the

   BGP best path selection procedure will produce a set of "non-EVPN

   best paths".  For a given prefix advertised in one or more EVPN ISF

   routes, the BGP best path selection procedure will produce a set of

   "EVPN best paths". =BB

I think the EVPN vs non EVPN paths is a bit misleading. Couldn=92t we simpl=
ify say that we have best path selection at ISF level which inserts routes =
in IP-VRF and then we have a new selection at VRF level.
[jorge] the new ISF SAFI is EVPN, and the new spec is the selection between=
 EVPN and non-EVPN. The rest of the ISF SAFIs and their interaction was alr=
eady there. That=92s why we thought it was clearer to talk in terms of EVPN=
 and non-EVPN. Let us know if it is not ok.

Regarding the new tie-breakers:
It s not clear to me which steps tie breaks an IPVPN path vs an EVPN path (=
composite PE case) that are equivalent (only ISF changes).
[jorge] if everything else is the same, step 4 would remove from considerat=
ion the IPVPN path.



Section 7:

I agree with Suresh=92s comment about the unclarity of the first bullet.
This document makes ISF 1 in the picture, so all the procedures defined in =
the document are applicable to all the combinations of ISFs including SAFI1=
 <-> SAFI 128. So the text must be written carefully.
[jorge] check out the new text, we tried to capture SAFI 1 consistently now=
..


Section 10:  This section should be at the top of the document.
[jorge] done

Section 11:
You need a security consideration section.
[jorge] done

Section 15:
IMO, intersubnet forwarding and prefix-adv drafts must be normative as they=
 are key components of the solution.
[jorge] ok, done



Pls update the draft and then I=92ll ask IDR to have a review on the draft =
as well.


Brgds,

Stephane


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</head>
<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" style=3D"word-wrap:=
break-word">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">Stephane, all<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
">After a few discussions, we published rev 04, which addresses all the com=
ments received, including Stephane=92s comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
;color:black">Please see in-line.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Consolas=
;color:black">Thanks!</span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">Jorge</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From:<span class=3D"apple-c=
onverted-space">&nbsp;</span></span></b><span style=3D"font-size:12.0pt;col=
or:black">Ali Sajassi (sajassi) &lt;<a href=3D"mailto:sajassi@cisco.com">sa=
jassi@cisco.com</a>&gt;<br>
<b>Date:<span class=3D"apple-converted-space">&nbsp;</span></b>Monday, Dece=
mber 14, 2020 at 5:17 AM<br>
<b>To:<span class=3D"apple-converted-space">&nbsp;</span></b>Stephane Litko=
wski (slitkows) &lt;<a href=3D"mailto:slitkows@cisco.com">slitkows@cisco.co=
m</a>&gt;,<span class=3D"apple-converted-space">&nbsp;</span><a href=3D"mai=
lto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org">draft-ietf-bess-evpn-=
ipvpn-interworking@ietf.org</a><span class=3D"apple-converted-space">&nbsp;=
</span>&lt;<a href=3D"mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.o=
rg">draft-ietf-bess-evpn-ipvpn-interworking@ietf.org</a>&gt;<br>
<b>Cc:<span class=3D"apple-converted-space">&nbsp;</span></b><a href=3D"mai=
lto:bess@ietf.org">bess@ietf.org</a><span class=3D"apple-converted-space">&=
nbsp;</span>&lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;,<spa=
n class=3D"apple-converted-space">&nbsp;</span><a href=3D"mailto:bess-chair=
s@ietf.org">bess-chairs@ietf.org</a><span class=3D"apple-converted-space">&=
nbsp;</span>&lt;<a href=3D"mailto:bess-chairs@ietf.org">bess-chairs@ietf.or=
g</a>&gt;<br>
<b>Subject:<span class=3D"apple-converted-space">&nbsp;</span></b>Re: draft=
-ietf-bess-evpn-ipvpn-interworking chair review</span><span style=3D"color:=
black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Hi Stephane,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Jorge, John, DJ, and I met several times over t=
he course of last two weeks to address DJ and some of the other outstanding=
 comments and in doing so covering the following three cases as well:<o:p><=
/o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">a)</span><span style=3D"font-size:7.0pt;font-fa=
mily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</span></span><spa=
n style=3D"color:black">Advertisements of routes learned over a local AC by=
 a GW into
 the participating domains w/o a domain-path Attribute<o:p></o:p></span></p=
>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">b)</span><span style=3D"font-size:7.0pt;font-fa=
mily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;<span class=3D"apple-converted-space">&nbsp;</span></span><span styl=
e=3D"color:black">Advertisements of routes learned over a local AC by a GW =
into
 the participating domains w/ a domain-path Attribute that contains a new S=
AFI and new a domain-id<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">c)</span><span style=3D"font-size:7.0pt;font-fa=
mily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</span></span><spa=
n style=3D"color:black">Advertisements of routes learned over a local AC by=
 a GW into
 the participating domains w/ a domain-path Attribute that contains a new S=
AFI and one of the existing domain-id<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Jorge is working hard to incorporate the new ch=
anges and by end of the week he should have a new rev that address all the =
comments including yours below.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Ali<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font-=
size:12.0pt;color:black">From:<span class=3D"apple-converted-space">&nbsp;<=
/span></span></b><span style=3D"font-size:12.0pt;color:black">&quot;Stephan=
e Litkowski (slitkows)&quot; &lt;<a href=3D"mailto:slitkows@cisco.com">slit=
kows@cisco.com</a>&gt;<br>
<b>Date:<span class=3D"apple-converted-space">&nbsp;</span></b>Friday, Dece=
mber 11, 2020 at 7:37 AM<br>
<b>To:<span class=3D"apple-converted-space">&nbsp;</span></b>&quot;<a href=
=3D"mailto:draft-ietf-bess-evpn-ipvpn-interworking@ietf.org">draft-ietf-bes=
s-evpn-ipvpn-interworking@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ie=
tf-bess-evpn-ipvpn-interworking@ietf.org">draft-ietf-bess-evpn-ipvpn-interw=
orking@ietf.org</a>&gt;<br>
<b>Cc:<span class=3D"apple-converted-space">&nbsp;</span></b>&quot;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bes=
s@ietf.org">bess@ietf.org</a>&gt;, &quot;<a href=3D"mailto:bess-chairs@ietf=
.org">bess-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess-chairs@ietf=
.org">bess-chairs@ietf.org</a>&gt;<br>
<b>Subject:<span class=3D"apple-converted-space">&nbsp;</span></b>draft-iet=
f-bess-evpn-ipvpn-interworking chair review<br>
<b>Resent-From:<span class=3D"apple-converted-space">&nbsp;</span></b>&lt;<=
a href=3D"mailto:alias-bounces@ietf.org">alias-bounces@ietf.org</a>&gt;<br>
<b>Resent-To:<span class=3D"apple-converted-space">&nbsp;</span></b>&lt;<a =
href=3D"mailto:jorge.rabadan@nokia.com">jorge.rabadan@nokia.com</a>&gt;, Ci=
sco Employee &lt;<a href=3D"mailto:sajassi@cisco.com">sajassi@cisco.com</a>=
&gt;, &lt;<a href=3D"mailto:erosen52@gmail.com">erosen52@gmail.com</a>&gt;,
 &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;, &lt;=
<a href=3D"mailto:wlin@juniper.net">wlin@juniper.net</a>&gt;, &lt;<a href=
=3D"mailto:ju1738@att.com">ju1738@att.com</a>&gt;, &lt;<a href=3D"mailto:ad=
am.1.simpson@nokia.com">adam.1.simpson@nokia.com</a>&gt;<br>
<b>Resent-Date:<span class=3D"apple-converted-space">&nbsp;</span></b>Frida=
y, December 11, 2020 at 7:35 AM</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><span style=3D"color:bl=
ack">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Hi Authors,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Please find below my chair review related to dr=
aft-ietf-bess-evpn-ipvpn-interworking.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">BTW, you need to refresh the draft now, it has =
expired.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 3:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">=B7</span><span style=3D"font-size:7.0pt;font-f=
amily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</spa=
n></span><span style=3D"color:black">Nit:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">s/uniqueness of the DOMAIN- ID/uniqueness of th=
e DOMAIN-ID/<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] f=
ixed, thx</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">=B7</span><span style=3D"font-size:7.0pt;font-f=
amily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</spa=
n></span><span style=3D"color:black">a) I agree with DJ=92s comment on: =93=
This attribute list may contain
 zero, one or more segments&quot;. It is actually one or more.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] f=
ixed, thx</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">=B7</span><span style=3D"font-size:7.0pt;font-f=
amily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</spa=
n></span><span style=3D"color:black">The section 3 contains both normative =
and non-normative language.
 If section 3 is intended to detail the normative behavior of adding/modify=
ing D-PATH, it must use normative for any of the normative procedure. For i=
nstance b) may require normative language. While it is very good to have an=
 example in b), one or more clear
 normative rules are required before talking about the example.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] o=
k, added more normative language.</span><span style=3D"color:black"><o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">=B7</span><span style=3D"font-size:7.0pt;font-f=
amily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</spa=
n></span><span style=3D"color:black">b) talks about domain-ids attached to =
IP-VRF, this is fine.
 However, the text should provide a wider view so people don=92t think that=
 this is the only option. Domain-Ids may be assigned at VRF level, but also=
 at more a higher level (BGP peer), or even lower level (bgp community=85).=
 We should not limit implementations
 here in the granularity domain-ids are defined.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] c=
heck out the new text in (e)</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-a=
lign:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-=
width: 0px;word-spacing:0px">
<span style=3D"color:black">=B7</span><span style=3D"font-size:7.0pt;font-f=
amily:&quot;Times New Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;<span class=3D"apple-converted-space">&nbsp;</spa=
n></span><span style=3D"color:black">c) I don=92t see why =93MUST NOT=94, i=
t does not hurt to have a DOMAIN-ID
 associated with non ISF world (routes learned from IGP, static)=85 there c=
ould be design where people do BGP one leg and non-BGP on the other leg. We=
 should probably relax that.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] c=
heck out the new text in (c)</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Would you mind adding a beautiful ASCII-ART for=
 the attribute format ? It=92s usually good to have when reading to see the=
 attribute format rather than having to read the text.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] d=
one</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">You need to define the error handling procedure=
s for D-PATH as per RFC7606 (you should have it as normative ref too).<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] d=
one, check out the new text in (g)</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 3.1<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">This sentence is misleading and does not match =
with the normative behavior of Section 3) d)<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">=93In general, any interworking PE that imports an ISF route MU=
ST flag<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">&nbsp;&nbsp; the route as &quot;looped&quot; if its D-PATH cont=
ains a &lt;DOMAIN-ID:ISF_SAFI_TYPE&gt; segment, where DOMAIN-ID matches a l=
ocal DOMAIN-ID<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">&nbsp;&nbsp; in the tenant IP-VRF.=94<o:p></o:p></span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;color:b=
lack">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">I don=92t see the value of this section beyond =
providing an example. The normative behavior is already given in Section 3)=
 d). Can=92t the example be packed under d).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] o=
k, done.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Also the pointed sentence still refers to a DOM=
AIN-ID per VRF, which is not good for a generic statement. My domain ID inf=
o could from the BGP peer config. Again, this option of per VRF is fine, bu=
t this is not the only one that can
 be implemented.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] a=
greed. See new text.</span><span style=3D"color:black"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 4.1:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">I don=92t see why =93no-propagation-mode=94 is =
the default mode. This is breaking existing propagation of attributes from =
SAFI 1 to SAFI 128. When we have a CE running BGP with a PE, the PE propaga=
tes the attributes (CTs, ASPATH, MED=85) coming
 from the CE.<span class=3D"apple-converted-space">&nbsp;</span><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] t=
he reason why it is the default mode is security (the security section poin=
ts out some risks of the propagation or attributes). In order to not break =
existing RFC4364 implementations we
 added this:</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">=93This i=
s the default mode of operation for gateway PEs that re-export ISF routes f=
rom any ISF SAFI into EVPN, and from EVPN into any other SAFI.=94 =96 since=
 there is no other spec for EVPN interworking,
 we should be fine.</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">&nbsp;</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">This section creates some ambiguity about the D=
-PATH attribute. Based on Section 3, D-PATH will be necessarily sent but re=
ceived D-PATH may be dropped and new one created but the text of section 4.=
1 makes me think that it=92s not the
 case in no-propagation mode.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">I think setting D-PATH is orthogonal to the att=
ribute propagation.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">As section 4.1 tells, people may still want to =
rely on existing SoO for instance in some case in this case D-PATH may not =
be added.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">I think section 3 and 4.1 have to be more clear=
 on the normative procedures about D-PATH addition/modification.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] g=
ood point. I clarified section 3(b) - D-PATH MUST be added by the gateway P=
E as long as the gateway works in uniform-propagation-mode.</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 4.2:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Isn=92t it dangerous to try to define which att=
ributes needs to be propagated, and which one should not be ? We are always=
 creating new attributes, should people update this doc each time a new att=
ribute comes ? I don=92t really see how
 this could be managed.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] t=
he reason is security again. We don=92t want to blindly propagate things ac=
ross ISF domains. Only those things that help with best path selection. An =
example of things you don=92t want to
 simply blindly propagate is BGP tunnel encapsulation attributes, route-tar=
gets, EVPN communities, bgp prefix-sid attribute=85 by doing so, unexpected=
 situations may happen. So yes, we think future specs will need to say if I=
SF gateway PEs need to propagate the
 new attribute or not.</span><span style=3D"color:black"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Isn=92t there an indentation issue starting =93=
When propagating an ISD route to a different ISF SAFI=85=94 ?<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] s=
hould be fixed now, thx</span><span style=3D"color:black"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">The considerations about ASPATH look really imp=
lementation details to me (at least the way it is written). Basically the A=
SPATH propagation rules doesn=92t change and the gateway function itself do=
es not modify the ASPATH.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Similarly, for the IBGP-only path attributes, t=
he word =93copy=94 looks really implementation dependent. Why not telling t=
hat the advertised route should keep the received iBGP-only attribute ?<o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] o=
k, I changed it with =93keep=94</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">You should also clarify considerations regardin=
g rfc6368.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] n=
ot sure what you mean, would you suggest some text please?</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 4.3:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Shouldn=92t we just follow existing aggregation=
 rules of each attribute ? Again, what happens when new attributes are comi=
ng in. I don=92t think that the gateway function has actually something to =
change in the aggregation process. Aggregation
 is happening in the VRF, there is no change compared to what is existing t=
oday, for VRF, it=92s just IP prefix aggregation.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] T=
he aggregation per se is just IP aggregation, but the definition of what to=
 do with attributes on the aggregate is new, I think it needs to be clearly=
 specified.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">However, as we are defining D-PATH, we can defi=
ne aggregation rules related to D-PATH.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] i=
t is also included yes.</span><span style=3D"color:black"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 5:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">=93For a given prefix advertised in one or more non-EVPN ISF ro=
utes, the<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">&nbsp;&nbsp; BGP best path selection procedure will produce a s=
et of &quot;non-EVPN<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">&nbsp;&nbsp; best paths&quot;.&nbsp; For a given prefix adverti=
sed in one or more EVPN ISF<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">&nbsp;&nbsp; routes, the BGP best path selection procedure will=
 produce a set of<o:p></o:p></span></pre>
<pre style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0);font-variant-cap=
s: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adj=
ust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px"><span style=3D"c=
olor:black">&nbsp;&nbsp; &quot;EVPN best paths&quot;.&nbsp;=BB<o:p></o:p></=
span></pre>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">I think the EVPN vs non EVPN paths is a bit mis=
leading. Couldn=92t we simplify say that we have best path selection at ISF=
 level which inserts routes in IP-VRF and then we have a new selection at V=
RF level.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] t=
he new ISF SAFI is EVPN, and the new spec is the selection between EVPN and=
 non-EVPN. The rest of the ISF SAFIs and their interaction was already ther=
e. That=92s why we thought it was clearer
 to talk in terms of EVPN and non-EVPN. Let us know if it is not ok.</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Regarding the new tie-breakers:<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">It s not clear to me which steps tie breaks an =
IPVPN path vs an EVPN path (composite PE case) that are equivalent (only IS=
F changes).<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] i=
f everything else is the same, step 4 would remove from consideration the I=
PVPN path.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 7:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">I agree with Suresh=92s comment about the uncla=
rity of the first bullet.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">This document makes ISF 1 in the picture, so al=
l the procedures defined in the document are applicable to all the combinat=
ions of ISFs including SAFI1 &lt;-&gt; SAFI 128. So the text must be writte=
n carefully.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] c=
heck out the new text, we tried to capture SAFI 1 consistently now..</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 10: &nbsp;This section should be at the=
 top of the document.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] d=
one</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 11:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">You need a security consideration section.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] d=
one</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Section 15:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">IMO, intersubnet forwarding and prefix-adv draf=
ts must be normative as they are key components of the solution.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style=3D"font-size:10.5pt;font-family:Consolas;color:black">[jorge] o=
k, done</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Pls update the draft and then I=92ll ask IDR to=
 have a review on the draft as well.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Brgds,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt;caret-color: rgb(0, 0, 0=
);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-we=
bkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px=
">
<span style=3D"color:black">Stephane<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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Hi Alvaro,
thank you for the review and comments. And thank you for the re-sent
comments as I was one of those who missed it the first time (may try
blaming Gmail). Please find my answers, notes below tagged by GIM>>,

Also, attached is the diff highlighting the updates.

Regards,
Greg

On Thu, Dec 17, 2020 at 12:47 PM Alvaro Retana <aretana.ietf@gmail.com>
wrote:

> Hi!
>
> For some reason the original DISCUSS message didn=E2=80=99t make it into
> everyone=E2=80=99s mailbox (including mine), so I=E2=80=99m =E2=80=9Chija=
cking=E2=80=9D this reply to
> resend the comments.
>
> Note that the archive has the messages:
> https://mailarchive.ietf.org/arch/msg/iesg/PByc1h2E-xSBnqXUtFTcltutEkQ/
>
> Alvaro.
>
>
> =3D=3D=3D
>
>
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
> (1) This document describes several methods to determine the status of a
> tunnel (in =C2=A73), none of which "provide a "fast failover" solution wh=
en used
> alone, but can be used together with the mechanism described in Section 4=
"
> (=C2=A71).  =C2=A73 also says this:
>
>    An implementation may support any combination of the methods
>    described in this section and provide a network operator with control
>    to choose which one to use in the particular deployment.
>
> While =C2=A73.1 is clear in the fact that it is not a requirement for all
> downstream PEs to use the same mechanism, there are no guidelines to aid
> the
> operator to chose which mechanism to use.  Some cases may be obvious (e.g=
.
> =C2=A73.1.3 applies to tunnels of a specific type), but others are not.  =
I would
> like to see deployment considerations related to the
> advantages/disadvantages
> that each method may have in specific situations (including their possibl=
e
> combination).
>
GIM>> I think it might be not that simple to compare deployment challenges
and benefits resulting from the deployment of different P-tunnel monitoring
methods because we have to somehow abstract from an impact of choices made
by respective implementations. Also, there probably should be a reference
environment, a use case we agree with. I agree that such a comparative
analysis of P-tunnel monitoring methods is useful it doesn't seem to
benefit this document as the choice of a developer which ones to implement
and an operator which one to use don't affect the functionality discussed
in the draft. Would you agree?

>
>
> (2) The BFD Discriminator Attribute has a very narrow application in this
> document when compared to the potential other uses given the extensibilit=
y
> possibilities related to bootstrapping BFD.  I have serious concerns abou=
t
> the attribute being defined in this document, amongst a series of other
> mechanisms.
>
> (2a) The tunnel can be monitored without the new BGP Attribute (assuming
> proper configuration of course).  Why is that option is not even mentione=
d
> in
> the document?
>
GIM>> You are right, there could be other methods to bootstrap a p2mp BFD
session. But since RFC 8562 has no discussion of bootstrapping a session,
having it in this draft seemed somewhat out of place. We can add an
informational reference to Section 4 of draft-mirsky-mpls-p2mp-bfd
<https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-bfd/>where several
bootstrapping options discussed. Would that be acceptable?

>
> In fact, the document recommends deleting the BFD session if the Attribut=
e
> is
> not present.  Why is that recommendation in place, and what are the cases
> when
> it can not be followed?
>
GIM>> That recommendation is to ensure that resources are not leaked and
this monitoring mechanism does not amplify possible DoS attacks. In course
of the discussion with Murray, we've changed the normative language and now
the deletion of the BFD state information is required
   o  the P2MP BFD session MUST be deleted.  The session MAY be deleted
      after some configurable delay, which should have a reasonable
      default.


>
>
> (2b) The fact that BFD monitoring can be achieved without the new attribu=
te
> makes me think that the bootstrapping of BFD using BGP would be better
> served
> in a document produced by the BFD WG.  One of the editors has expressed t=
he
> same opinion [1] [2].  Has a discussion taken place in the BFD WG (or at
> least
> with the Chairs) about this work?  Why was it not taken up there?
>
>
> [1]
> https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c=
/
> [2] https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-96-bess.html

GIM>> Work on draft-mirsky-mpls-p2mp-bfd
<https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-bfd/?include_text=
=3D1>
is
progressing at MPLS WG. AFAIK, it is in the state Candidate for WG
Adoption. Moving the definition of the BFD Discriminator attribute to that
draft, as I understand, would require using it as the normative reference.
Comparing the current states of both documents, would severely delay the
publication of MVPN Fast Failover specification and likely affect
implementations of P-tunnel monitoring mechanisms. I hope you can agree
with the current organization of the document.

>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> (0) I support Ben's DISCUSS.
>
>
> (1) This document (currently) specifies a new BGP attribute, but I couldn=
't
> find any discussion about it in the idr mailing list.  Has idr been given
> the
> opportunity to review?
>
GIM>> I hope BESS Chairs and the Responsible AD can help with the answer.

>
>
> (2) s/is an OPTIONAL procedure/is an optional procedure
> This is not a normative statement to require capitalization.
>
GIM>>  I think that the use of the normative form is reasonable. The
sentence can be re-worded using MAY. For example:
OLD TEXT:
   The procedure described here is an OPTIONAL procedure that is based
   on a downstream PE taking into account the status of P-tunnels rooted
   at each possible Upstream PE, for including or not including each
   given PE in the list of candidate UMHs for a given (C-S, C-G) state.
NEW TEXT:
   The procedure described here MAY be used in a BGP/MPLS MVPN [RFC6513].
It  is based
   on a downstream PE taking into account the status of P-tunnels rooted
   at each possible Upstream PE, for including or not including each
   given PE in the list of candidate UMHs for a given (C-S, C-G) state.
We wanted to stress that without this mechanism BGP/MPLS MVPN, as defined
in RFCs 6513 and 6514, is fully functional and architecturally complete.
This draft discusses mechanisms that support the protection and faster
convergence in MVPN's control plane. And since these mechanisms only an
improvement compared to the BGP mechanisms, we wanted to emphasize that by
using the normative form. Would you agree?

>
>
> (3) "VRF Route Import BGP attribute" is mentioned twice (=C2=A73 and =C2=
=A75), but
> it is
> not an attribute; it is an extended community (rfc6514).
>
GIM>>  Thank you for pointing that out. Updated.

>
>
> (4) =C2=A73.1.1: "similar to BGP next-hop tracking"  Is this specified
> somewhere?
> I don't remember seeing a specification for next-hop tracking, but do kno=
w
> that implementations do it -- in an implementation-specific way.  Please
> add a
> little more text about what is meant/expected.
>
GIM>> Indeed, BGP next-hop tracking is internal to a system behavior that
has not been, to the best of my knowledge, been documented at IETF or any
SDO. Would the following text provide reasonable context information:
   That is similar to BGP next-hop tracking for VPN routes, except that
   the address considered is not the BGP next-hop address but the root
   address in the x-PMSI Tunnel attribute.  BGP next-hop tracking is a
   feature that reduces the BGP convergence time comparing to the
   "regular" BGP by monitoring BGP next-hop address changes in the
   routing table.  It's event-based because it detects changes in the
   routing table.  When it detects a change, it performs a next-hop scan
   to find if any of the next hops in the BGP table is affected and updates
   it accordingly.


>
> (5) =C2=A73.1.1: "If BGP next-hop tracking is done...and the root
> address...[is]...the same as the next-hop address...then checking...wheth=
er
> the tunnel root is reachable, will be unnecessary duplication...."  I gue=
ss
> this means that the existing next-hop tracking functionality can be used
> and
> that it doesn't have to be function-specific (root vs next-hop).  This
> paragraph seems to assume a specific implementation -- but again, given
> that
> next-hop tracking implementations are internal then this paragraph doesn'=
t
> make much sense to me.
>
GIM>> This section is intended as informative since, as you've mentioned
earlier, there are many implementations of BGP next-hop tracking and the
functionality is enabled by default in some of the implementations. Our
intent was to point out that this well-known and broadly used mechanism can
be used in combination with PE redundancy to provide a faster convergence
in MVPN's control plane.

>
>
> (6) The "reachability condition" is mentioned in =C2=A73.1.1/=C2=A73.1.3/=
=C2=A73.1.4.
> Does
> this mean that that root tracking (=C2=A73.1.1) should be used with the o=
ther
> mechanisms?  The specific text says that "the downstream PE can immediate=
ly
> update its UMH when the reachability condition changes", giving the
> impression
> that the combination is possible but not required.
>
> Note that =C2=A74.3 is titled "Reachability Determination", which I hoped=
 would
> shed more light, but all it does is point back to =C2=A73.1.
>
GIM>> I don't see any benefit of concurrently using more than one of the
described in the document mechanisms that can monitor the state of a
P-tunnel. That is certainly possible but, in my opinion, would add
unnecessary complexity. The last paragraph in Section 3.1 is intended as
the introduction to sub-sections that discuss different monitoring
mechanisms:
   An implementation may support any combination of the methods
   described in this section and provide a network operator with control
   to choose which one to use in the particular deployment.
Would you suggest an update to this paragraph to clarify the statement?

>
>
> (7) =C2=A73.1.2: What is the "last-hop link" of the tunnel?  Is it the ph=
ysical
> link, or the virtual hop from the previous waypoint?
>
GIM>> A last-hop link is a link between a PE and the penultimate P node.

>
>
> (8) =C2=A73.1.2 mentions that "careful consideration and coordination" is=
 needed
> when using other mechanisms such as rfc4090 "because uncorrelated timers
> might
> cause unnecessary switchovers and destabilize the network."  What are the
> associated timers related to the mechanisms in this section?
>
GIM>> This is in reference to the defect detection timers. When using
multi-layer protection particular consideration must be given to the
interaction of defect detections at different layers of a network. It s
recommended to use longer detection intervals at the higher layers. Some
recommendations suggest using a multiplier of 3 or larger, e.g., 10 msec
detection for FRR and at least 100 msec for e2e detection.

>
>
> (9) =C2=A73.1.3:
>
>    When using this method and if the signaling state for a P2MP TE LSP
>    is removed (e.g., if the ingress of the P2MP TE LSP sends a PathTear
>    message) or the P2MP TE LSP changes state from Up to Down as
>    determined by procedures in [RFC4875], the status of the
>    corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
>    transitions from Up to Down state, the Upstream PE that is the
>    ingress of the P-tunnel MUST NOT be considered a valid UMH.
>
> These two sentences are redundant.  It seems to me that they could be
> replaced by:
>
>    When using this method and if the signaling state for a P2MP TE LSP
>    is removed (e.g., if the ingress of the P2MP TE LSP sends a PathTear
>    message) or the P2MP TE LSP changes state from Up to Down as
>    determined by procedures in [RFC4875], the Upstream PE that is the
>    ingress of the P-tunnel MUST NOT be considered a valid UMH.
>
GIM>> Thank you for the suggested update of the text. I think that the
original text includes an important requirement to re-evaluate the status
of the corresponding P-tunnel rather than remove the Upstream PE from the
UMH candidate list only based on the change in p2mp TE LSP.

>
>
> (10) =C2=A73.1.4: "An Upstream PE SHOULD be removed from the UMH candidat=
e
> list...if...the upstream one-hop branch of the tunnel from P to PE cannot
> be
> built."   When is it ok to not remove the PE?  IOW, why is this action no=
t
> required?
>
GIM>> Thank you for bringing this case. It was discussed during Shepherd's
review and we've asked for the expert's opinion. Jeffrey Zhang kindly sugge=
sted
the current text.
<https://mailarchive.ietf.org/arch/browse/bess/?gbt=3D1&index=3DLxKYi9F6u1t=
l2qKtR2Q8wkQPMOA>
I'll
check with him and get back with the answer.

>
>
> (11) [nit] s/mechanism to execute its actions/mechanism execute its actio=
ns
>
GIM>> Thank you. Done

>
>
> (12) =C2=A73.1.5 says that "where this mechanism is used in conjunction w=
ith the
> method described in Section 5...downstream PEs can compare reception on t=
he
> two P-tunnels to determine when one of them is down", but =C2=A75 says th=
at
> "downstream PEs accept traffic from the primary or standby tunnel, based =
on
> the status of the tunnel (based on Section 3)".  IOW, =C2=A73.1.5 points =
at =C2=A75
> as
> providing a way to determine if a tunnel is down, while =C2=A75 points ba=
ck at
> =C2=A73
> as the way to determine which tunnel to receive from.  This pointing back
> and
> forth is not a total contradiction, but it needs to be clarified.
>
 GIM>> Though it might appear as a circular reference, it was not the
intention. An implementation of the method described in the last paragraph
of Section 3.1.5 can periodically accept traffic from primary and standby
tunnels s the method of determining the state of the primary P-tunnel. I've
updated that paragraph to note that the comparison can be done periodically=
:
OLD TEXT:
   In cases where this mechanism is used in conjunction with the method
   described in Section 5, no prior knowledge of the rate or maximum
   inter-packet time on the multicast streams is required; downstream
   PEs can compare actual packet reception statistics on the two
   P-tunnels to determine when one of them is down.  The detailed
   specification of this mechanism is outside the scope of this
   document.
NEW TEXT:
   In cases where this mechanism is used in conjunction with the method
   described in Section 5, no prior knowledge of the rate or maximum
   inter-packet time on the multicast streams is required; downstream
   PEs can periodically compare actual packet reception statistics on
   the two P-tunnels to determine when one of them is down.  The
   detailed specification of this mechanism is outside the scope of this
   document.

>
>
> (13) =C2=A73.1.6: "An implementation that does not recognize or is config=
ured
> not
> to support this attribute MUST follow procedures defined for optional
> transitive path attributes in Section 5 of [RFC4271]."
>
> There cannot be a Normative action specified for a node that "does not
> recognize...this attribute" because, by definition, it can't be assumed
> that
> it is aware of this specification.  In this case, it is not necessary to
> say
> anything about unrecognized attributes because that is already specified =
in
> rfc4271.
>
> For the "configured not to support this attribute" case, it should be
> pointed
> out that the node should operate as if the attribute was unrecognized.
>
> Suggestion>
>    An implementation that is configured not to support this attribute MUS=
T
>    follow the procedures defined in Section 5 of [RFC4271] as if the
> attribute
>    was unrecognized.
>
GIM>> Thank you for pointing this out. In the course of addressing comments
from other IESG reviewers, this text was updated to:
   This document defines the format and ways of using a new BGP
   attribute called the "BFD Discriminator".  It is an optional
   transitive BGP attribute.  Thus it is expected that an implementation
   that does not recognize or is configured not to support this
   attribute follows procedures defined for optional transitive path
   attributes in Section 5 of [RFC4271].
Would the current text address your concern?

>
>
> (14) [nit] s/BFD Mode field is the one octet long./The BFD Mode field is
> one
> octet long.
>
GIM>> Thank you. Done.

>
>
> (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be considered mal=
formed
> if
> its length is not a non-zero multiple of four."  Ok, except that the
> specification of the attribute doesn't mention the length (only the lengt=
h
> of
> the TLVs).  Please specify the length and any considerations related to t=
he
> Extended Length bit.  Also, given that this is a new attribute, with an
> unspecified potential number of TLVs, and that the length is apparently
> unbounded, all leading to the potential need for extended messages, pleas=
e
> specify how to handle peers that cannot accommodate more than 4k octet
> messages (rfc8654).
>
GIM>> I've noticed a note from Jeff Hass. Would you agree with his opinion?

>
>
> (16) =C2=A73.1.6.1: "MUST set the IP destination address of the inner IP
> header to
> one of the internal loopback addresses..."   Where do these addresses com=
e
> from?  How does the Upstream PE figure out which one to use?  At least
> please
> include a reference to where that is explained.
>
GIM>> Thank you for pointing out the missing reference to RFC 1122, added
it. I think that the selection of the inner destination IP address is an
implementation issue and how the address is selected should not affect a
MultipointTail node. Would you agree?

>
>
> (17) =C2=A73.1.6.1: "MUST use its IP address as the source IP address"  W=
hich
> address?  Please be specific.
>
GIM>> Section 3.1.6.1 includes the list that an Upstream PE is required to
follow:
   To enable downstream PEs to track the P-tunnel status using a point-
   to-multipoint (P2MP) BFD session the Upstream PE:
....
   o  MUST use its IP address as the source IP address when transmitting
      BFD Control packets;
Would adding the reference to the Upstream PE address your concern:
    o  MUST use its, i.e., the Upstream PE's, IP address as the source IP
address
        when transmitting BFD Control packets;

>
>
> (18) =C2=A73.1.6.2: If the IP address doesn't map correctly at the downst=
ream
> PE
> (for example, a different local address is used that doesn't correspond t=
o
> the
> information in the PMSI attribute), what action should it take?  Can the
> tunnel still be monitored?
>
GIM>> There's a possibility that the same downstream PE is monitoring more
than one P-tunnel. Since each Upstream PE assigns its own BFD
Discriminator, there's a chance that the same value is picked by more than
one Upstream PE. According to Section 5.7 of the RFC 8562:
   IP and MPLS multipoint tails MUST demultiplex BFD packets based on a
   combination of the source address, My Discriminator, and the identity
   of the multipoint path that the multipoint BFD Control packet was
   received from.  Together they uniquely identify the head of the
   multipoint path.
We may consider adding the source address in the BFD Discriminator
attribute as an optional TLV. I think that might be a good extension that
can be introduced in a new document.

>
>
> (19) =C2=A73.1.6.2: "SHOULD NOT switch the traffic to the Standby Upstrea=
m PE"
> When is it ok to do it?  IOW, why is this action recommended, and not
> required.
>
GIM>> Thank you for pointing this out. I agree that it is the requirement.
s/SHOULD NOT/MUST NOT/

>
>
> (20) =C2=A73.1.7: "set the bfd.LocalDiag of the P2MP BFD session to Conca=
tenated
> Path Down and/or Reverse Concatenated Path Down"    Which one?
>  bfd.LocalDiag
> carries a single value.
>
GIM>> Thank you. This is the editorial error, clearly, it is "or". Which of
the two values is used may depend upon the detection mechanism used
monitoring the CE-PE link.

>
>
> (21) =C2=A73.1.7: "...it is desired for the downstream PEs to switch to a=
 backup
> Upstream PE.  To achieve that...it SHOULD set the bfd.LocalDiag..."  If n=
ot
> set, then the objective won't be achieved.  When is it ok to not set the
> bfd.LocalDiag to indicate the concatenated failure?
>
GIM>> I agree with you, that is the required behavior. s/SHOULD/MUST/

>
>
> (22) =C2=A74: "Such behavior is referred to as "revertive" behavior and M=
UST be
> supported."  The text around this sentence seems to indicate that the
> revertive behavior is the default, is that the intent?  Or if the intent
> for
> it just to be supported (as written)?  Please be clear.
>
GIM>> This part of the document has been updated in the course of
addressing IESG comments:
   Such behavior is referred to as
   "revertive" behavior and MUST be supported.  Non-revertive behavior
   refers to the behavior of continuing to select the backup PE as the
   UMH even after the Primary has come up.  This non-revertive behavior
   MAY also be supported by an implementation and would be enabled
   through some configuration.  Selection of the behavior, revertive or
   non-revertive, is an operational issue, but it MUST be consistent on
   all PEs in the given MVPN.
Do you find the updated text clear enough?

>
>
> (23) =C2=A74.1: "...routes that carry the "Standby PE" BGP Community MUST=
 have
> the
> LOCAL_PREF attribute set to zero."  What should a receiver do if the
> LOCAL_PREF is not zero?
>
GIM>> I believe that the preceding text describes the situation when the
LOCAL_PREF !=3D 0:
   ... two different downstream PEs
   consider different Upstream PEs to be the primary one.  In that case,
   without any precaution taken, both Upstream PEs would process a
   standby C-multicast route and possibly stop forwarding at the same
   time.
>
>
>
> (24) =C2=A74.1: In the last paragraph of this section, if I follow correc=
tly,
> the
> text talks about the case where the standby becomes the primary and the
> updated advertisement doesn't have the Standby PE community.  If that is
> correct, then s/ presence/absence of the Standby PE BGP Community/ absenc=
e
> of
> the Standby PE BGP Community
>
> Also, the last sentence says that the "LOCAL_PREF attribute MUST be set t=
o
> zero".  If the community is not present, how can a receiver enforce this?
> What action should it take if the LOCAL_PREF has a different value?
>
GIM>> Thank you for the suggestion, it clarifies the text. As I understand,
the requirement is for the Standby Upstream PE, not for a downstream PE.
Would the following update make that clearer:
OLD TEXT:
   The LOCAL_PREF attribute MUST be set to zero.
NEW TEXT:
   The new Upstream PE MUST set the LOCAL_PREF attribute to
   zero for that C-multicast route.

>
>
> (25) =C2=A74.3: "other mechanisms MAY be used"   s/MAY/may   This is just=
 a
> statement of fact.
>
GIM>> Agree.

>
>
> (26) =C2=A74.4.2: "MUST try to locate"   To try is not an action that can=
 be
> normatively enforced.   Also, I don't think that using "MUST" here adds
> value
> since the normative action is in the next sentence ("MUST perform as
> follows"). s/MUST/must
>
GIM>> Agree.

>
>
> (27) s/"hot root standby" mode is used (Section 4)/"hot root standby" mod=
e
> is
> used (Section 5)
>
GIM>> Thank you for catching the wrong reference. Updated.

>
>
> (28) =C2=A77.3: s/sub-TLV/TLV/g   The attribute includes TLVs, not sub-TL=
Vs.
>
GIM>> Agree and updated.

--00000000000073bfe505b6ee7bb7
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Alvaro,<div>thank you for the review a=
nd=C2=A0comments. And thank you for the re-sent comments as I was one of th=
ose who missed it the first time (may try blaming Gmail). Please find my an=
swers, notes below tagged by GIM&gt;&gt;,</div><div><br></div><div>Also, at=
tached is the diff highlighting the updates.</div><div><br></div><div>Regar=
ds,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"lt=
r" class=3D"gmail_attr">On Thu, Dec 17, 2020 at 12:47 PM Alvaro Retana &lt;=
<a href=3D"mailto:aretana.ietf@gmail.com">aretana.ietf@gmail.com</a>&gt; wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi!<br>
<br>
For some reason the original DISCUSS message didn=E2=80=99t make it into<br=
>
everyone=E2=80=99s mailbox (including mine), so I=E2=80=99m =E2=80=9Chijack=
ing=E2=80=9D this reply to<br>
resend the comments.<br>
<br>
Note that the archive has the messages:<br>
<a href=3D"https://mailarchive.ietf.org/arch/msg/iesg/PByc1h2E-xSBnqXUtFTcl=
tutEkQ/" rel=3D"noreferrer" target=3D"_blank">https://mailarchive.ietf.org/=
arch/msg/iesg/PByc1h2E-xSBnqXUtFTcltutEkQ/</a><br>
<br>
Alvaro.<br>
<br>
<br>
=3D=3D=3D<br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
DISCUSS:<br>
----------------------------------------------------------------------<br>
<br>
(1) This document describes several methods to determine the status of a<br=
>
tunnel (in =C2=A73), none of which &quot;provide a &quot;fast failover&quot=
; solution when used<br>
alone, but can be used together with the mechanism described in Section 4&q=
uot;<br>
(=C2=A71). =C2=A0=C2=A73 also says this:<br>
<br>
=C2=A0 =C2=A0An implementation may support any combination of the methods<b=
r>
=C2=A0 =C2=A0described in this section and provide a network operator with =
control<br>
=C2=A0 =C2=A0to choose which one to use in the particular deployment.<br>
<br>
While =C2=A73.1 is clear in the fact that it is not a requirement for all<b=
r>
downstream PEs to use the same mechanism, there are no guidelines to aid th=
e<br>
operator to chose which mechanism to use.=C2=A0 Some cases may be obvious (=
e.g.<br>
=C2=A73.1.3 applies to tunnels of a specific type), but others are not.=C2=
=A0 I would<br>
like to see deployment considerations related to the advantages/disadvantag=
es<br>
that each method may have in specific situations (including their possible<=
br>
combination).<br></blockquote><div>GIM&gt;&gt; I think it might be not that=
 simple to compare deployment challenges and benefits resulting from the de=
ployment of different P-tunnel monitoring methods because we have to someho=
w abstract from an impact of choices made by respective implementations. Al=
so, there probably should be a reference environment, a use case we agree w=
ith. I agree that such a comparative analysis of P-tunnel monitoring method=
s is useful it doesn&#39;t seem to benefit this document as the choice of a=
 developer which ones to implement and an operator which one to use don&#39=
;t affect the functionality discussed in the draft. Would you agree?</div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(2) The BFD Discriminator Attribute has a very narrow application in this<b=
r>
document when compared to the potential other uses given the extensibility<=
br>
possibilities related to bootstrapping BFD.=C2=A0 I have serious concerns a=
bout<br>
the attribute being defined in this document, amongst a series of other<br>
mechanisms.<br>
<br>
(2a) The tunnel can be monitored without the new BGP Attribute (assuming<br=
>
proper configuration of course).=C2=A0 Why is that option is not even menti=
oned in<br>
the document?<br></blockquote><div>GIM&gt;&gt; You are right, there could b=
e other methods to bootstrap a p2mp BFD session. But since RFC 8562 has no =
discussion of bootstrapping a session, having it in this draft seemed somew=
hat out of place. We can add an informational reference to Section 4 of=C2=
=A0<a href=3D"https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-bfd/"=
>draft-mirsky-mpls-p2mp-bfd=C2=A0</a>where several bootstrapping options di=
scussed. Would that be acceptable?</div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex">
<br>
In fact, the document recommends deleting the BFD session if the Attribute =
is<br>
not present.=C2=A0 Why is that recommendation in place, and what are the ca=
ses when<br>
it can not be followed?<br></blockquote><div>GIM&gt;&gt; That recommendatio=
n is to ensure that resources are not leaked and this monitoring mechanism =
does not amplify possible DoS attacks. In course of the discussion with Mur=
ray, we&#39;ve changed the normative language and now the deletion of the B=
FD state information is required</div><div>=C2=A0 =C2=A0o =C2=A0the P2MP BF=
D session MUST be deleted.=C2=A0 The session MAY be deleted<br>=C2=A0 =C2=
=A0 =C2=A0 after some configurable delay, which should have a reasonable<br=
>=C2=A0 =C2=A0 =C2=A0 default.<br></div><div>=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
<br>
(2b) The fact that BFD monitoring can be achieved without the new attribute=
<br>
makes me think that the bootstrapping of BFD using BGP would be better serv=
ed<br>
in a document produced by the BFD WG.=C2=A0 One of the editors has expresse=
d the<br>
same opinion [1] [2].=C2=A0 Has a discussion taken place in the BFD WG (or =
at least<br>
with the Chairs) about this work?=C2=A0 Why was it not taken up there?<br>
<br>
<br>
[1] <a href=3D"https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTp=
uD_wA0JC3CT1c/" rel=3D"noreferrer" target=3D"_blank">https://mailarchive.ie=
tf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c/</a><br>
[2] <a href=3D"https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-96-bes=
s.html" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/wg/bess=
/minutes?item=3Dminutes-96-bess.html</a></blockquote><div>GIM&gt;&gt; Work =
on=C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-=
bfd/?include_text=3D1">draft-mirsky-mpls-p2mp-bfd</a>=C2=A0is progressing a=
t MPLS WG. AFAIK, it is in the state=C2=A0Candidate for WG Adoption. Moving=
 the definition of the BFD Discriminator attribute to that draft, as I unde=
rstand, would require using it as the normative reference. Comparing the cu=
rrent states of both documents, would severely delay the publication of MVP=
N Fast Failover specification and likely affect implementations of P-tunnel=
 monitoring mechanisms. I hope you can agree with the current organization =
of the document.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br=
>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
(0) I support Ben&#39;s DISCUSS.<br>
<br>
<br>
(1) This document (currently) specifies a new BGP attribute, but I couldn&#=
39;t<br>
find any discussion about it in the idr mailing list.=C2=A0 Has idr been gi=
ven the<br>
opportunity to review?<br></blockquote><div>GIM&gt;&gt; I hope BESS Chairs =
and the Responsible=C2=A0AD can help with the answer.=C2=A0</div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(2) s/is an OPTIONAL procedure/is an optional procedure<br>
This is not a normative statement to require capitalization.<br></blockquot=
e><div>GIM&gt;&gt;=C2=A0 I think that the use of the normative form is reas=
onable. The sentence can be re-worded=C2=A0using MAY. For example:</div><di=
v>OLD TEXT:</div><div>=C2=A0 =C2=A0The procedure described here is an OPTIO=
NAL procedure that is based<br>=C2=A0 =C2=A0on a downstream PE taking into =
account the status of P-tunnels rooted<br>=C2=A0 =C2=A0at each possible Ups=
tream PE, for including or not including each<br>=C2=A0 =C2=A0given PE in t=
he list of candidate UMHs for a given (C-S, C-G) state.<br></div><div>NEW T=
EXT:</div><div>=C2=A0 =C2=A0The procedure described here MAY be used in a B=
GP/MPLS MVPN [RFC6513]. It=C2=A0 is based<br>=C2=A0 =C2=A0on a downstream P=
E taking into account the status of P-tunnels rooted<br>=C2=A0 =C2=A0at eac=
h possible Upstream PE, for including or not including each<br>=C2=A0 =C2=
=A0given PE in the list of candidate UMHs for a given (C-S, C-G) state.<br>=
</div><div>We wanted to stress that without this mechanism BGP/MPLS MVPN, a=
s defined in RFCs 6513 and 6514, is fully functional and architecturally co=
mplete. This draft discusses mechanisms that support the protection and fas=
ter convergence in MVPN&#39;s control plane. And since these mechanisms onl=
y an improvement compared to the BGP mechanisms, we wanted to emphasize tha=
t by using the normative form. Would you agree?</div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex">
<br>
<br>
(3) &quot;VRF Route Import BGP attribute&quot; is mentioned twice (=C2=A73 =
and =C2=A75), but it is<br>
not an attribute; it is an extended community (rfc6514).<br></blockquote><d=
iv>GIM&gt;&gt;=C2=A0 Thank you for pointing that out. Updated.</div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1p=
x solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(4) =C2=A73.1.1: &quot;similar to BGP next-hop tracking&quot; =C2=A0Is this=
 specified somewhere?<br>
I don&#39;t remember seeing a specification for next-hop tracking, but do k=
now<br>
that implementations do it -- in an implementation-specific way.=C2=A0 Plea=
se add a<br>
little more text about what is meant/expected.<br></blockquote><div>GIM&gt;=
&gt; Indeed, BGP next-hop tracking is internal to a system behavior that ha=
s not been, to the best of my knowledge, been documented at IETF or any SDO=
. Would the following text provide reasonable context information:</div><di=
v>=C2=A0 =C2=A0That is similar to BGP next-hop tracking for VPN routes, exc=
ept that<br>=C2=A0 =C2=A0the address considered is not the BGP next-hop add=
ress but the root<br>=C2=A0 =C2=A0address in the x-PMSI Tunnel attribute.=
=C2=A0 BGP next-hop tracking is a<br>=C2=A0 =C2=A0feature that reduces the =
BGP convergence time comparing to the<br>=C2=A0 =C2=A0&quot;regular&quot; B=
GP by monitoring BGP next-hop address changes in the<br>=C2=A0 =C2=A0routin=
g table.=C2=A0 It&#39;s event-based because it detects changes in the<br>=
=C2=A0 =C2=A0routing table.=C2=A0 When it detects a change, it performs a n=
ext-hop scan<br>=C2=A0 =C2=A0to find if any of the next hops in the BGP tab=
le is affected and updates<br>=C2=A0 =C2=A0it accordingly.<br></div><div><b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(5) =C2=A73.1.1: &quot;If BGP next-hop tracking is done...and the root<br>
address...[is]...the same as the next-hop address...then checking...whether=
<br>
the tunnel root is reachable, will be unnecessary duplication....&quot; =C2=
=A0I guess<br>
this means that the existing next-hop tracking functionality can be used an=
d<br>
that it doesn&#39;t have to be function-specific (root vs next-hop).=C2=A0 =
This<br>
paragraph seems to assume a specific implementation -- but again, given tha=
t<br>
next-hop tracking implementations are internal then this paragraph doesn&#3=
9;t<br>
make much sense to me.<br></blockquote><div>GIM&gt;&gt; This section is int=
ended as informative since, as you&#39;ve mentioned earlier, there are many=
 implementations of BGP next-hop tracking and the functionality is enabled =
by default in some of the implementations. Our intent was to point out that=
 this well-known and broadly used mechanism can be used in combination with=
 PE redundancy to provide a faster convergence in MVPN&#39;s control plane.=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(6) The &quot;reachability condition&quot; is mentioned in =C2=A73.1.1/=C2=
=A73.1.3/=C2=A73.1.4.=C2=A0 Does<br>
this mean that that root tracking (=C2=A73.1.1) should be used with the oth=
er<br>
mechanisms?=C2=A0 The specific text says that &quot;the downstream PE can i=
mmediately<br>
update its UMH when the reachability condition changes&quot;, giving the im=
pression<br>
that the combination is possible but not required.<br>
<br>
Note that =C2=A74.3 is titled &quot;Reachability Determination&quot;, which=
 I hoped would<br>
shed more light, but all it does is point back to =C2=A73.1.<br></blockquot=
e><div>GIM&gt;&gt; I don&#39;t see any benefit=C2=A0of concurrently using m=
ore than one of the described in the document mechanisms that can monitor t=
he state of a P-tunnel. That is certainly possible but, in my opinion, woul=
d add unnecessary complexity. The last paragraph in Section 3.1 is intended=
 as the introduction to sub-sections that discuss different monitoring mech=
anisms:</div><div>=C2=A0 =C2=A0An implementation may support any combinatio=
n of the methods</div>=C2=A0 =C2=A0described in this section and provide a =
network operator with control<br>=C2=A0 =C2=A0to choose which one to use in=
 the particular deployment.</div><div class=3D"gmail_quote">Would you sugge=
st an update to this paragraph to clarify the statement?<br><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">
<br>
<br>
(7) =C2=A73.1.2: What is the &quot;last-hop link&quot; of the tunnel?=C2=A0=
 Is it the physical<br>
link, or the virtual hop from the previous waypoint?<br></blockquote><div>G=
IM&gt;&gt; A last-hop link is a link between=C2=A0a PE and the penultimate =
P node.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(8) =C2=A73.1.2 mentions that &quot;careful consideration and coordination&=
quot; is needed<br>
when using other mechanisms such as rfc4090 &quot;because uncorrelated time=
rs might<br>
cause unnecessary switchovers and destabilize the network.&quot; =C2=A0What=
 are the<br>
associated timers related to the mechanisms in this section?<br></blockquot=
e><div>GIM&gt;&gt; This is in reference to the defect detection timers. Whe=
n using multi-layer protection particular consideration must be given to th=
e interaction of defect detections at different layers of a network. It s r=
ecommended=C2=A0to use longer=C2=A0detection intervals at the higher layers=
. Some recommendations suggest using a multiplier of 3 or larger, e.g., 10 =
msec detection for FRR and at least 100 msec for e2e detection.</div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(9) =C2=A73.1.3:<br>
<br>
=C2=A0 =C2=A0When using this method and if the signaling state for a P2MP T=
E LSP<br>
=C2=A0 =C2=A0is removed (e.g., if the ingress of the P2MP TE LSP sends a Pa=
thTear<br>
=C2=A0 =C2=A0message) or the P2MP TE LSP changes state from Up to Down as<b=
r>
=C2=A0 =C2=A0determined by procedures in [RFC4875], the status of the<br>
=C2=A0 =C2=A0corresponding P-tunnel MUST be re-evaluated.=C2=A0 If the P-tu=
nnel<br>
=C2=A0 =C2=A0transitions from Up to Down state, the Upstream PE that is the=
<br>
=C2=A0 =C2=A0ingress of the P-tunnel MUST NOT be considered a valid UMH.<br=
>
<br>
These two sentences are redundant.=C2=A0 It seems to me that they could be<=
br>
replaced by:<br>
<br>
=C2=A0 =C2=A0When using this method and if the signaling state for a P2MP T=
E LSP<br>
=C2=A0 =C2=A0is removed (e.g., if the ingress of the P2MP TE LSP sends a Pa=
thTear<br>
=C2=A0 =C2=A0message) or the P2MP TE LSP changes state from Up to Down as<b=
r>
=C2=A0 =C2=A0determined by procedures in [RFC4875], the Upstream PE that is=
 the<br>
=C2=A0 =C2=A0ingress of the P-tunnel MUST NOT be considered a valid UMH.<br=
></blockquote><div>GIM&gt;&gt; Thank you for the suggested update of the te=
xt. I think that the original text includes an important requirement to re-=
evaluate the status of the corresponding P-tunnel rather than remove the Up=
stream PE from the UMH candidate list only based on the change in p2mp TE L=
SP.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(10) =C2=A73.1.4: &quot;An Upstream PE SHOULD be removed from the UMH candi=
date<br>
list...if...the upstream one-hop branch of the tunnel from P to PE cannot b=
e<br>
built.&quot; =C2=A0 When is it ok to not remove the PE?=C2=A0 IOW, why is t=
his action not<br>
required?<br></blockquote><div>GIM&gt;&gt; Thank you for bringing this case=
. It was discussed during Shepherd&#39;s review and we&#39;ve asked for the=
 expert&#39;s opinion. Jeffrey Zhang kindly <a href=3D"https://mailarchive.=
ietf.org/arch/browse/bess/?gbt=3D1&amp;index=3DLxKYi9F6u1tl2qKtR2Q8wkQPMOA"=
>suggested the current text.</a>=C2=A0I&#39;ll check with him and get back =
with the answer.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(11) [nit] s/mechanism to execute its actions/mechanism execute its actions=
<br></blockquote><div>GIM&gt;&gt; Thank you. Done=C2=A0</div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
 rgb(204,204,204);padding-left:1ex">
<br>
<br>
(12) =C2=A73.1.5 says that &quot;where this mechanism is used in conjunctio=
n with the<br>
method described in Section 5...downstream PEs can compare reception on the=
<br>
two P-tunnels to determine when one of them is down&quot;, but =C2=A75 says=
 that<br>
&quot;downstream PEs accept traffic from the primary or standby tunnel, bas=
ed on<br>
the status of the tunnel (based on Section 3)&quot;.=C2=A0 IOW, =C2=A73.1.5=
 points at =C2=A75 as<br>
providing a way to determine if a tunnel is down, while =C2=A75 points back=
 at =C2=A73<br>
as the way to determine which tunnel to receive from.=C2=A0 This pointing b=
ack and<br>forth is not a total contradiction, but it needs to be clarified=
.<br></blockquote><div>=C2=A0GIM&gt;&gt; Though it might appear as a circul=
ar reference, it was not the intention. An implementation of the method des=
cribed in the last paragraph of Section 3.1.5 can periodically accept traff=
ic from primary and standby tunnels s the method of determining the state o=
f the primary P-tunnel. I&#39;ve updated that paragraph to note that the co=
mparison can be done periodically:</div><div>OLD TEXT:</div><div>=C2=A0 =C2=
=A0In cases where this mechanism is used in conjunction with the method<br>=
=C2=A0 =C2=A0described in Section 5, no prior knowledge of the rate or maxi=
mum<br>=C2=A0 =C2=A0inter-packet time on the multicast streams is required;=
 downstream<br>=C2=A0 =C2=A0PEs can compare actual packet reception statist=
ics on the two<br>=C2=A0 =C2=A0P-tunnels to determine when one of them is d=
own.=C2=A0 The detailed<br>=C2=A0 =C2=A0specification of this mechanism is =
outside the scope of this<br>=C2=A0 =C2=A0document.<br></div><div>NEW TEXT:=
</div><div>=C2=A0 =C2=A0In cases where this mechanism is used in conjunctio=
n with the method<br>=C2=A0 =C2=A0described in Section 5, no prior knowledg=
e of the rate or maximum<br>=C2=A0 =C2=A0inter-packet time on the multicast=
 streams is required; downstream<br>=C2=A0 =C2=A0PEs can periodically compa=
re actual packet reception statistics on<br>=C2=A0 =C2=A0the two P-tunnels =
to determine when one of them is down.=C2=A0 The<br>=C2=A0 =C2=A0detailed s=
pecification of this mechanism is outside the scope of this<br>=C2=A0 =C2=
=A0document.<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(13) =C2=A73.1.6: &quot;An implementation that does not recognize or is con=
figured not<br>
to support this attribute MUST follow procedures defined for optional<br>
transitive path attributes in Section 5 of [RFC4271].&quot;<br>
<br>
There cannot be a Normative action specified for a node that &quot;does not=
<br>
recognize...this attribute&quot; because, by definition, it can&#39;t be as=
sumed that<br>
it is aware of this specification.=C2=A0 In this case, it is not necessary =
to say<br>
anything about unrecognized attributes because that is already specified in=
<br>
rfc4271.<br>
<br>
For the &quot;configured not to support this attribute&quot; case, it shoul=
d be pointed<br>
out that the node should operate as if the attribute was unrecognized.<br>
<br>
Suggestion&gt;<br>
=C2=A0 =C2=A0An implementation that is configured not to support this attri=
bute MUST<br>
=C2=A0 =C2=A0follow the procedures defined in Section 5 of [RFC4271] as if =
the attribute<br>
=C2=A0 =C2=A0was unrecognized.<br></blockquote><div>GIM&gt;&gt; Thank you f=
or pointing this out. In the course of addressing comments from other IESG =
reviewers, this text was updated to:</div>=C2=A0 =C2=A0This document define=
s the format and ways of using a new BGP<br>=C2=A0 =C2=A0attribute called t=
he &quot;BFD Discriminator&quot;.=C2=A0 It is an optional<br>=C2=A0 =C2=A0t=
ransitive BGP attribute.=C2=A0 Thus it is expected that an implementation<b=
r>=C2=A0 =C2=A0that does not recognize or is configured not to support this=
<br>=C2=A0 =C2=A0attribute follows procedures defined for optional transiti=
ve path<br><div>=C2=A0 =C2=A0attributes in Section 5 of [RFC4271].</div><di=
v>Would the current text address your concern?=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
<br>
(14) [nit] s/BFD Mode field is the one octet long./The BFD Mode field is on=
e<br>
octet long.<br></blockquote><div>GIM&gt;&gt; Thank you. Done.=C2=A0</div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(15) =C2=A73.1.6: &quot;The BFD Discriminator attribute MUST be considered =
malformed if<br>
its length is not a non-zero multiple of four.&quot; =C2=A0Ok, except that =
the<br>
specification of the attribute doesn&#39;t mention the length (only the len=
gth of<br>
the TLVs).=C2=A0 Please specify the length and any considerations related t=
o the<br>
Extended Length bit.=C2=A0 Also, given that this is a new attribute, with a=
n<br>
unspecified potential number of TLVs, and that the length is apparently<br>
unbounded, all leading to the potential need for extended messages, please<=
br>
specify how to handle peers that cannot accommodate more than 4k octet<br>
messages (rfc8654).<br></blockquote><div>GIM&gt;&gt; I&#39;ve noticed a not=
e from Jeff Hass. Would you agree with his opinion?=C2=A0</div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex">
<br>
<br>
(16) =C2=A7<a href=3D"http://3.1.6.1" rel=3D"noreferrer" target=3D"_blank">=
3.1.6.1</a>: &quot;MUST set the IP destination address of the inner IP head=
er to<br>
one of the internal loopback addresses...&quot; =C2=A0 Where do these addre=
sses come<br>
from?=C2=A0 How does the Upstream PE figure out which one to use?=C2=A0 At =
least please<br>
include a reference to where that is explained.<br></blockquote><div>GIM&gt=
;&gt; Thank you for pointing out the missing reference to RFC 1122, added i=
t. I think that the selection of the inner destination IP address is an imp=
lementation issue and how the address is selected should not affect a Multi=
pointTail node. Would you agree?=C2=A0</div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">
<br>
<br>
(17) =C2=A7<a href=3D"http://3.1.6.1" rel=3D"noreferrer" target=3D"_blank">=
3.1.6.1</a>: &quot;MUST use its IP address as the source IP address&quot; =
=C2=A0Which<br>
address?=C2=A0 Please be specific.<br></blockquote><div>GIM&gt;&gt; Section=
 3.1.6.1 includes the list that an Upstream PE is required to follow:</div>=
=C2=A0 =C2=A0To enable downstream PEs to track the P-tunnel status using a =
point-<br><div>=C2=A0 =C2=A0to-multipoint (P2MP) BFD session the Upstream P=
E:</div><div>....</div>=C2=A0 =C2=A0o =C2=A0MUST use its IP address as the =
source IP address when transmitting<br><div>=C2=A0 =C2=A0 =C2=A0 BFD Contro=
l packets;</div><div>Would adding the reference to the Upstream PE address =
your concern:</div><div>=C2=A0 =C2=A0 o =C2=A0MUST use its, i.e., the Upstr=
eam PE&#39;s, IP address as the source IP address</div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 when transmitting BFD Control packets;</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
<br>
(18) =C2=A7<a href=3D"http://3.1.6.2" rel=3D"noreferrer" target=3D"_blank">=
3.1.6.2</a>: If the IP address doesn&#39;t map correctly at the downstream =
PE<br>
(for example, a different local address is used that doesn&#39;t correspond=
 to the<br>
information in the PMSI attribute), what action should it take?=C2=A0 Can t=
he<br>
tunnel still be monitored?<br></blockquote><div>GIM&gt;&gt; There&#39;s a p=
ossibility that the same downstream PE is monitoring more than one P-tunnel=
. Since each Upstream PE assigns its own BFD Discriminator, there&#39;s a c=
hance that the same value is picked by more than one Upstream PE. According=
 to Section 5.7 of the RFC 8562:</div><div>=C2=A0 =C2=A0IP and MPLS multipo=
int tails MUST demultiplex BFD packets based on a<br>=C2=A0 =C2=A0combinati=
on of the source address, My Discriminator, and the identity<br>=C2=A0 =C2=
=A0of the multipoint path that the multipoint BFD Control packet was<br>=C2=
=A0 =C2=A0received from.=C2=A0 Together they uniquely identify the head of =
the<br>=C2=A0 =C2=A0multipoint path.<br></div><div>We may consider adding t=
he source address in the BFD Discriminator attribute as an optional TLV. I =
think that might be a good extension that can be introduced in a new docume=
nt.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(19) =C2=A7<a href=3D"http://3.1.6.2" rel=3D"noreferrer" target=3D"_blank">=
3.1.6.2</a>: &quot;SHOULD NOT switch the traffic to the Standby Upstream PE=
&quot;<br>
When is it ok to do it?=C2=A0 IOW, why is this action recommended, and not<=
br>
required.<br></blockquote><div>GIM&gt;&gt; Thank you for pointing this out.=
 I agree that it is the requirement. s/SHOULD NOT/MUST NOT/</div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(20) =C2=A73.1.7: &quot;set the bfd.LocalDiag of the P2MP BFD session to Co=
ncatenated<br>
Path Down and/or Reverse Concatenated Path Down&quot; =C2=A0 =C2=A0Which on=
e? =C2=A0bfd.LocalDiag<br>
carries a single value.<br></blockquote><div>GIM&gt;&gt; Thank you. This is=
 the editorial error, clearly, it is &quot;or&quot;. Which of the two value=
s is used may depend upon the detection mechanism used monitoring the CE-PE=
 link.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(21) =C2=A73.1.7: &quot;...it is desired for the downstream PEs to switch t=
o a backup<br>
Upstream PE.=C2=A0 To achieve that...it SHOULD set the bfd.LocalDiag...&quo=
t; =C2=A0If not<br>
set, then the objective won&#39;t be achieved.=C2=A0 When is it ok to not s=
et the<br>
bfd.LocalDiag to indicate the concatenated failure?<br></blockquote><div>GI=
M&gt;&gt; I agree with you, that is the required behavior. s/SHOULD/MUST/=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(22) =C2=A74: &quot;Such behavior is referred to as &quot;revertive&quot; b=
ehavior and MUST be<br>
supported.&quot; =C2=A0The text around this sentence seems to indicate that=
 the<br>
revertive behavior is the default, is that the intent?=C2=A0 Or if the inte=
nt for<br>
it just to be supported (as written)?=C2=A0 Please be clear.<br></blockquot=
e><div>GIM&gt;&gt; This part of the document has been updated in the course=
 of addressing IESG comments:</div><div>=C2=A0 =C2=A0Such behavior is refer=
red to as</div>=C2=A0 =C2=A0&quot;revertive&quot; behavior and MUST be supp=
orted.=C2=A0 Non-revertive behavior<br>=C2=A0 =C2=A0refers to the behavior =
of continuing to select the backup PE as the<br>=C2=A0 =C2=A0UMH even after=
 the Primary has come up.=C2=A0 This non-revertive behavior<br>=C2=A0 =C2=
=A0MAY also be supported by an implementation and would be enabled<br>=C2=
=A0 =C2=A0through some configuration.=C2=A0 Selection of the behavior, reve=
rtive or<br>=C2=A0 =C2=A0non-revertive, is an operational issue, but it MUS=
T be consistent on<br>=C2=A0 =C2=A0all PEs in the given MVPN.</div><div cla=
ss=3D"gmail_quote">Do you find the updated text clear enough?<br><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(23) =C2=A74.1: &quot;...routes that carry the &quot;Standby PE&quot; BGP C=
ommunity MUST have the<br>
LOCAL_PREF attribute set to zero.&quot; =C2=A0What should a receiver do if =
the<br>
LOCAL_PREF is not zero?<br></blockquote><div>GIM&gt;&gt; I believe that the=
 preceding text describes the situation when the LOCAL_PREF !=3D 0:</div><d=
iv>=C2=A0 =C2=A0... two different downstream PEs</div>=C2=A0 =C2=A0consider=
 different Upstream PEs to be the primary one.=C2=A0 In that case,<br>=C2=
=A0 =C2=A0without any precaution taken, both Upstream PEs would process a<b=
r>=C2=A0 =C2=A0standby C-multicast route and possibly stop forwarding at th=
e same<br>=C2=A0 =C2=A0time.<blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x">
<br>
<br>
(24) =C2=A74.1: In the last paragraph of this section, if I follow correctl=
y, the<br>
text talks about the case where the standby becomes the primary and the<br>
updated advertisement doesn&#39;t have the Standby PE community.=C2=A0 If t=
hat is<br>
correct, then s/ presence/absence of the Standby PE BGP Community/ absence =
of<br>
the Standby PE BGP Community<br>
<br>
Also, the last sentence says that the &quot;LOCAL_PREF attribute MUST be se=
t to<br>
zero&quot;.=C2=A0 If the community is not present, how can a receiver enfor=
ce this?<br>
What action should it take if the LOCAL_PREF has a different value?<br></bl=
ockquote><div>GIM&gt;&gt; Thank you=C2=A0for=C2=A0the suggestion, it clarif=
ies the text. As I understand, the requirement is for the Standby Upstream =
PE, not for a downstream PE. Would the following update make that clearer:<=
/div><div>OLD TEXT:</div><div>=C2=A0 =C2=A0The LOCAL_PREF attribute MUST be=
 set to zero.<br></div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0The new Upstre=
am PE MUST set the LOCAL_PREF attribute to<br>=C2=A0 =C2=A0zero for that C-=
multicast route.<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
>
<br>
<br>
(25) =C2=A74.3: &quot;other mechanisms MAY be used&quot; =C2=A0 s/MAY/may =
=C2=A0 This is just a<br>
statement of fact.<br></blockquote><div>GIM&gt;&gt; Agree.=C2=A0</div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(26) =C2=A74.4.2: &quot;MUST try to locate&quot; =C2=A0 To try is not an ac=
tion that can be<br>
normatively enforced. =C2=A0 Also, I don&#39;t think that using &quot;MUST&=
quot; here adds value<br>
since the normative action is in the next sentence (&quot;MUST perform as<b=
r>
follows&quot;). s/MUST/must<br></blockquote><div>GIM&gt;&gt; Agree.=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bor=
der-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
(27) s/&quot;hot root standby&quot; mode is used (Section 4)/&quot;hot root=
 standby&quot; mode is<br>
used (Section 5)<br></blockquote><div>GIM&gt;&gt; Thank you for catching th=
e wrong reference. Updated.=C2=A0</div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">
<br>
<br>
(28) =C2=A77.3: s/sub-TLV/TLV/g =C2=A0 The attribute includes TLVs, not sub=
-TLVs.<br></blockquote><div>GIM&gt;&gt; Agree and updated.=C2=A0</div></div=
></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sun, 20 Dec 2020 16:25:21 -0800
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: Alvaro Retana <aretana.ietf@gmail.com>, The IESG <iesg@ietf.org>,  draft-ietf-bess-mvpn-fast-failover@ietf.org, bess-chairs@ietf.org,  BESS <bess@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>, bfd-chairs@ietf.org
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Hi Jeff,
your comments and suggestions are much appreciated. Please find my answers
and notes in-lined below and tagger by GIM>>.
Attached, please find the diff and the new working version of the draft.

Regards,
Greg

On Wed, Dec 16, 2020 at 1:04 PM Jeffrey Haas <jhaas@pfrc.org> wrote:

> Alvaro,
>
> Thanks for drawing our attention to this document.
>
> On Tue, Dec 15, 2020 at 03:09:54PM -0800, Alvaro Retana via Datatracker
> wrote:
> > Alvaro Retana has entered the following ballot position for
> > draft-ietf-bess-mvpn-fast-failover-13: Discuss
> >
> > When responding, please keep the subject line intact and reply to all
> > email addresses included in the To and CC lines. (Feel free to cut this
> > introductory paragraph, however.)
> >
> >
> > Please refer to
> https://www.ietf.org/iesg/statement/discuss-criteria.html
> > for more information about IESG DISCUSS and COMMENT positions.
> >
> >
> > The document, along with other ballot positions, can be found here:
> > https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
> >
> >
> >
> > ----------------------------------------------------------------------
> > DISCUSS:
> > ----------------------------------------------------------------------
> >
> > (1) This document describes several methods to determine the status of =
a
> > tunnel (in =C2=A73), none of which "provide a "fast failover" solution =
when
> used
> > alone, but can be used together with the mechanism described in Section
> 4"
> > (=C2=A71).  =C2=A73 also says this:
> >
> >    An implementation may support any combination of the methods
> >    described in this section and provide a network operator with contro=
l
> >    to choose which one to use in the particular deployment.
> >
> > While =C2=A73.1 is clear in the fact that it is not a requirement for a=
ll
> > downstream PEs to use the same mechanism, there are no guidelines to ai=
d
> the
> > operator to chose which mechanism to use.  Some cases may be obvious
> (e.g.
> > =C2=A73.1.3 applies to tunnels of a specific type), but others are not.=
  I
> would
> > like to see deployment considerations related to the
> advantages/disadvantages
> > that each method may have in specific situations (including their
> possible
> > combination).
> >
> >
> > (2) The BFD Discriminator Attribute has a very narrow application in th=
is
> > document when compared to the potential other uses given the
> extensibility
> > possibilities related to bootstrapping BFD.  I have serious concerns
> about
> > the attribute being defined in this document, amongst a series of other
> > mechanisms.
>
> I have the following comments about the BGP Path Attribute in question:
>
> - BGP Packet space is sometimes at a premium.  The initial 3 octet reserv=
ed
>   padding should be removed.
>
GIM>> Agree. Removed

> - The TLVs having a required length of multiples of 4 similarly are space
>   wasting.
>
GIM>> Agree. Updated the check on the receipt accordingly.

> - The attribute does not make adequate provision for more than one type o=
f
> a
>   BFD Mode.  This likely limits the general purpose re-use of this
> attribute
>   for other purposes.
>
GIM>> In Section 7.2 we're requesting IANA to create a new sub-registry.
New types of a BFD session can be bootstrapped using the BGP BFD
Discriminator attribute. For example, draft-ietf-bess-evpn-bfd
<https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-bfd/?include_text=3D=
1> may
introduce a new BFD Mode value. Would you suggest larger field for BFD Mode
or an alternative method to signal the type of the BFD session to which the
value in the BFD Discriminator field is applicable? I thought that, in some
cases, a new value for p2mp with Active Tail Unsolicited Notifications or
p2mp Active Tail with Polling would be added.

> - The length handling text is likely not correct:
>   "The BFD Discriminator attribute MUST be considered malformed if its
>    length is not a non-zero multiple of four."
>   The implication is a length of four, which would have no BFD
>   Discriminator, should be considered a valid PDU.  Note that the length
>   considerations are further compounded by the padding issue for optional
>   sub-tlvs in the prior point.
>
GIM>> Thank you for pointing this case out. I agree, that is not what we
wanted. Following updates noted above the new text is as follows:
NEW TEXT:
   The BFD Discriminator attribute MUST be considered malformed if its
   length is smaller than five octets or the value of the BFD Mode field
   is unrecognized.  If the attribute is deemed to be malformed, the
   UPDATE message SHALL be handled using the approach of Attribute
   Discard per [RFC7606].

>
> Since a BFD discriminator is 4-octets, I'm curious as to what discussion
> the
> working group may have had with regard to using a BGP Extended Community
> instead?  In particular, the BGP Extended Community's Transitive bit migh=
t
> be useful in many multicast VPN scenarios operating over a single AS to
> limit the distribution scope of this Discriminator.
>
GIM>> I agree that the BGP Extended Community attribute can address the
immediate problem and be used to bootstrap a p2mp BFD session. It would
even have space for the BFD Mode field. But because the length of the BFD
Extended Communities attribute is fixed, it seems that no further
extensions (e.g., providing the MultipointHead's source IP address) be
possible.

>
> The IANA allocation strategies for the Path Attribute and the Optional
> Sub-TLVs seems reasonable.  Note that Experimental code points have prove=
n
> to be poorly used in BGP and that their use in the public Internet may
> result in unexpected discard of the attribute.
>
>
> >
> > (2a) The tunnel can be monitored without the new BGP Attribute (assumin=
g
> > proper configuration of course).  Why is that option is not even
> mentioned in
> > the document?
> >
> > In fact, the document recommends deleting the BFD session if the
> Attribute is
> > not present.  Why is that recommendation in place, and what are the
> cases when
> > it can not be followed?
> >
> >
> > (2b) The fact that BFD monitoring can be achieved without the new
> attribute
> > makes me think that the bootstrapping of BFD using BGP would be better
> served
> > in a document produced by the BFD WG.  One of the editors has expressed
> the
> > same opinion [1] [2].  Has a discussion taken place in the BFD WG (or a=
t
> least
> > with the Chairs) about this work?  Why was it not taken up there?
> >
> >
> > [1]
> https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c=
/
> > [2] https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-96-bess.html
>
> I will not speak for Reshad, but I don't recall this issue.  I may simply
> be
> forgetting the e-mail brought to the list, if so.
>
> The meta desire here is that communication of the BFD Discriminator for
> p2mp
> sessions requires protocol help - in this case BGP.  While this could als=
o
> be discovered via provisioning, that would limit the flexibility of the
> deployment of this feature.
>
> For this specific internet-draft's purpose, dissemination of the
> Discriminator is tightly scoped.  The fact that this happens under an
> AFI/SAFI that is not expected to hit general purpose Internet routes limi=
ts
> the blast radius of its use.  However, as you note, Alvaro, there may be
> more general purpose desire to use this attribute for.
>
> > (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be considered
> malformed if
> > its length is not a non-zero multiple of four."  Ok, except that the
> > specification of the attribute doesn't mention the length (only the
> length of
> > the TLVs).  Please specify the length and any considerations related to
> the
> > Extended Length bit.  Also, given that this is a new attribute, with an
> > unspecified potential number of TLVs, and that the length is apparently
> > unbounded, all leading to the potential need for extended messages,
> please
> > specify how to handle peers that cannot accommodate more than 4k octet
> > messages (rfc8654).
>
> Note: I wouldn't put special requirements here on the Extended Length bit=
.
> That's core RFC 4271 Path Attribute behavior.
>
> Similarly, overflow of Path Attributes is a general BGP consideration and
> it
> is inapropriate to require this document to solve that.
>
>
> -- Jeff
>

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Jeff,<div>your comments and suggestion=
s are much appreciated. Please find my answers and notes in-lined below and=
 tagger by GIM&gt;&gt;.</div><div>Attached, please find the diff and the ne=
w working version of the draft.</div><div><br></div><div>Regards,</div><div=
>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Wed, Dec 16, 2020 at 1:04 PM Jeffrey Haas &lt;<a href=3D"mail=
to:jhaas@pfrc.org">jhaas@pfrc.org</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">Alvaro,<br>
<br>
Thanks for drawing our attention to this document.=C2=A0 <br>
<br>
On Tue, Dec 15, 2020 at 03:09:54PM -0800, Alvaro Retana via Datatracker wro=
te:<br>
&gt; Alvaro Retana has entered the following ballot position for<br>
&gt; draft-ietf-bess-mvpn-fast-failover-13: Discuss<br>
&gt; <br>
&gt; When responding, please keep the subject line intact and reply to all<=
br>
&gt; email addresses included in the To and CC lines. (Feel free to cut thi=
s<br>
&gt; introductory paragraph, however.)<br>
&gt; <br>
&gt; <br>
&gt; Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss=
-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/i=
esg/statement/discuss-criteria.html</a><br>
&gt; for more information about IESG DISCUSS and COMMENT positions.<br>
&gt; <br>
&gt; <br>
&gt; The document, along with other ballot positions, can be found here:<br=
>
&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-=
failover/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.or=
g/doc/draft-ietf-bess-mvpn-fast-failover/</a><br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; ----------------------------------------------------------------------=
<br>
&gt; DISCUSS:<br>
&gt; ----------------------------------------------------------------------=
<br>
&gt; <br>
&gt; (1) This document describes several methods to determine the status of=
 a<br>
&gt; tunnel (in =C2=A73), none of which &quot;provide a &quot;fast failover=
&quot; solution when used<br>
&gt; alone, but can be used together with the mechanism described in Sectio=
n 4&quot;<br>
&gt; (=C2=A71).=C2=A0 =C2=A73 also says this:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 An implementation may support any combination of the meth=
ods<br>
&gt;=C2=A0 =C2=A0 described in this section and provide a network operator =
with control<br>
&gt;=C2=A0 =C2=A0 to choose which one to use in the particular deployment.<=
br>
&gt; <br>
&gt; While =C2=A73.1 is clear in the fact that it is not a requirement for =
all<br>
&gt; downstream PEs to use the same mechanism, there are no guidelines to a=
id the<br>
&gt; operator to chose which mechanism to use.=C2=A0 Some cases may be obvi=
ous (e.g.<br>
&gt; =C2=A73.1.3 applies to tunnels of a specific type), but others are not=
.=C2=A0 I would<br>
&gt; like to see deployment considerations related to the advantages/disadv=
antages<br>
&gt; that each method may have in specific situations (including their poss=
ible<br>
&gt; combination).<br>
&gt; <br>
&gt; <br>
&gt; (2) The BFD Discriminator Attribute has a very narrow application in t=
his<br>
&gt; document when compared to the potential other uses given the extensibi=
lity<br>
&gt; possibilities related to bootstrapping BFD.=C2=A0 I have serious conce=
rns about<br>
&gt; the attribute being defined in this document, amongst a series of othe=
r<br>
&gt; mechanisms.<br>
<br>
I have the following comments about the BGP Path Attribute in question:<br>
<br>
- BGP Packet space is sometimes at a premium.=C2=A0 The initial 3 octet res=
erved<br>
=C2=A0 padding should be removed.<br></blockquote><div>GIM&gt;&gt; Agree. R=
emoved=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px=
 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
- The TLVs having a required length of multiples of 4 similarly are space<b=
r>
=C2=A0 wasting.<br></blockquote><div>GIM&gt;&gt; Agree. Updated the check o=
n the receipt accordingly.=C2=A0</div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex">
- The attribute does not make adequate provision for more than one type of =
a<br>
=C2=A0 BFD Mode.=C2=A0 This likely limits the general purpose re-use of thi=
s attribute<br>
=C2=A0 for other purposes.<br></blockquote><div>GIM&gt;&gt; In Section 7.2 =
we&#39;re requesting IANA to create a new sub-registry. New types of a BFD =
session can be bootstrapped using the BGP BFD Discriminator attribute. For =
example,=C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-e=
vpn-bfd/?include_text=3D1">draft-ietf-bess-evpn-bfd</a>=C2=A0may introduce =
a new BFD Mode value. Would you suggest larger field for BFD Mode or an alt=
ernative method to signal the type of the BFD session to which the value in=
 the BFD Discriminator field is applicable? I thought that, in some cases, =
a new value for p2mp with Active Tail Unsolicited Notifications or p2mp Act=
ive Tail with Polling would be added.</div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex">
- The length handling text is likely not correct:<br>
=C2=A0 &quot;The BFD Discriminator attribute MUST be considered malformed i=
f its<br>
=C2=A0 =C2=A0length is not a non-zero multiple of four.&quot;<br>
=C2=A0 The implication is a length of four, which would have no BFD<br>
=C2=A0 Discriminator, should be considered a valid PDU.=C2=A0 Note that the=
 length<br>
=C2=A0 considerations are further compounded by the padding issue for optio=
nal<br>
=C2=A0 sub-tlvs in the prior point.<br></blockquote><div>GIM&gt;&gt; Thank =
you for pointing this case out. I agree, that is not what we wanted. Follow=
ing updates noted above the new text is as follows:</div><div>NEW TEXT:</di=
v><div>=C2=A0 =C2=A0The BFD Discriminator attribute MUST be considered malf=
ormed if its<br>=C2=A0 =C2=A0length is smaller than five octets or the valu=
e of the BFD Mode field<br>=C2=A0 =C2=A0is unrecognized.=C2=A0 If the attri=
bute is deemed to be malformed, the<br>=C2=A0 =C2=A0UPDATE message SHALL be=
 handled using the approach of Attribute<br>=C2=A0 =C2=A0Discard per [RFC76=
06].<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Since a BFD discriminator is 4-octets, I&#39;m curious as to what discussio=
n the<br>
working group may have had with regard to using a BGP Extended Community<br=
>
instead?=C2=A0 In particular, the BGP Extended Community&#39;s Transitive b=
it might<br>
be useful in many multicast VPN scenarios operating over a single AS to<br>
limit the distribution scope of this Discriminator.<br></blockquote><div>GI=
M&gt;&gt; I agree that the BGP Extended Community attribute can address the=
 immediate problem and be used to bootstrap a p2mp BFD session. It would ev=
en have space for the BFD Mode field. But because the length of the BFD Ext=
ended Communities attribute is fixed, it seems that no further extensions (=
e.g., providing the MultipointHead&#39;s source IP address) be possible.</d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
The IANA allocation strategies for the Path Attribute and the Optional<br>
Sub-TLVs seems reasonable.=C2=A0 Note that Experimental code points have pr=
oven<br>
to be poorly used in BGP and that their use in the public Internet may<br>
result in unexpected discard of the attribute.<br>
<br>
<br>
&gt; <br>
&gt; (2a) The tunnel can be monitored without the new BGP Attribute (assumi=
ng<br>
&gt; proper configuration of course).=C2=A0 Why is that option is not even =
mentioned in<br>
&gt; the document?<br>
&gt; <br>
&gt; In fact, the document recommends deleting the BFD session if the Attri=
bute is<br>
&gt; not present.=C2=A0 Why is that recommendation in place, and what are t=
he cases when<br>
&gt; it can not be followed?<br>
&gt; <br>
&gt; <br>
&gt; (2b) The fact that BFD monitoring can be achieved without the new attr=
ibute<br>
&gt; makes me think that the bootstrapping of BFD using BGP would be better=
 served<br>
&gt; in a document produced by the BFD WG.=C2=A0 One of the editors has exp=
ressed the<br>
&gt; same opinion [1] [2].=C2=A0 Has a discussion taken place in the BFD WG=
 (or at least<br>
&gt; with the Chairs) about this work?=C2=A0 Why was it not taken up there?=
<br>
&gt; <br>
&gt; <br>
&gt; [1] <a href=3D"https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXu=
PatTpuD_wA0JC3CT1c/" rel=3D"noreferrer" target=3D"_blank">https://mailarchi=
ve.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c/</a><br>
&gt; [2] <a href=3D"https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-9=
6-bess.html" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/wg=
/bess/minutes?item=3Dminutes-96-bess.html</a><br>
<br>
I will not speak for Reshad, but I don&#39;t recall this issue.=C2=A0 I may=
 simply be<br>
forgetting the e-mail brought to the list, if so.<br>
<br>
The meta desire here is that communication of the BFD Discriminator for p2m=
p<br>
sessions requires protocol help - in this case BGP.=C2=A0 While this could =
also<br>
be discovered via provisioning, that would limit the flexibility of the<br>
deployment of this feature.<br>
<br>
For this specific internet-draft&#39;s purpose, dissemination of the<br>
Discriminator is tightly scoped.=C2=A0 The fact that this happens under an<=
br>
AFI/SAFI that is not expected to hit general purpose Internet routes limits=
<br>
the blast radius of its use.=C2=A0 However, as you note, Alvaro, there may =
be<br>
more general purpose desire to use this attribute for.<br>
<br>
&gt; (15) =C2=A73.1.6: &quot;The BFD Discriminator attribute MUST be consid=
ered malformed if<br>
&gt; its length is not a non-zero multiple of four.&quot;=C2=A0 Ok, except =
that the<br>
&gt; specification of the attribute doesn&#39;t mention the length (only th=
e length of<br>
&gt; the TLVs).=C2=A0 Please specify the length and any considerations rela=
ted to the<br>
&gt; Extended Length bit.=C2=A0 Also, given that this is a new attribute, w=
ith an<br>
&gt; unspecified potential number of TLVs, and that the length is apparentl=
y<br>
&gt; unbounded, all leading to the potential need for extended messages, pl=
ease<br>
&gt; specify how to handle peers that cannot accommodate more than 4k octet=
<br>
&gt; messages (rfc8654).<br>
<br>
Note: I wouldn&#39;t put special requirements here on the Extended Length b=
it.<br>
That&#39;s core RFC 4271 Path Attribute behavior.<br>
<br>
Similarly, overflow of Path Attributes is a general BGP consideration and i=
t<br>
is inapropriate to require this document to solve that.<br>
<br>
<br>
-- Jeff<br>
</blockquote></div></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sun, 20 Dec 2020 16:55:36 -0800
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Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess]  =?utf-8?q?=C3=89ric_Vyncke=27s_Abstain_on_draft-ietf-bess?= =?utf-8?q?-mvpn-fast-failover-13=3A_=28with_COMMENT=29?=
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Hi Eric,
apologies for the belated response. Please find my answers below in-lined
tagged by GIM>>.

Regards,
Greg

On Wed, Dec 16, 2020 at 2:05 AM =C3=89ric Vyncke via Datatracker <
noreply@ietf.org> wrote:

> =C3=89ric Vyncke has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-13: Abstain
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Thank you for the work put into this document.
>
> I have balloted ABSTAIN in the sense of "I oppose this document but
> understand
> that others differ and am not going to stand in the way of the others."
> because
> of the use outside of a node of the IPv4-mapped IPv6 addresses in section
> 3.1.6.1. A reply on this topic will be welcome.
>
> St=C3=A9phane in his doc shepherd's write up states that no implementatio=
n is
> known
> for a document born in 2008... Does the IETF really want to have this on
> the
> proposed standards track ?
>
> Please find below my ABSTAIN point, some non-blocking COMMENT points (but
> replies would be appreciated), and one nits.
>
> I hope that this helps to improve the document,
>
> Regards,
>
> -=C3=A9ric
>
> =3D=3D ABSTAIN =3D=3D
> -- Section 3.1.6.1 --
> I appreciate that the BFD WG relies on "::ffff:127.0.0.0/104" but those
> IPv4-mapped IPv6 addresses are assumed to never leave a node and should
> never
> be transmitted over the Internet (see
> https://tools.ietf.org/html/rfc5156#section-2.2). This is the cause of my
> ABSTAIN. As the inner packet is sent over a tunnel, why not using the a
> link-local address or the ff02::1 link-local multicast group ?
>
GIM>> This text has been updated. Please let me know if the new text is
acceptable:
NEW TEXT:
   o  when transmitting BFD Control packets MUST set the IP destination
      address of the inner IP header to the internal loopback address
      127.0.0.1/32 for IPv4 [RFC1122].  For IPv6, it MUST use the
      loopback address ::1/128 [RFC4291].

>
> =3D=3D COMMENTS =3D=3D
>
> -- Section 2.3 --
> The use of "upstream" and "Upstream" could be confusing... The latter cou=
ld
> have been "Upstream PE/ABSR" (often used later in the document) or "ingre=
ss
> node"
>
GIM>> We've tried to clarify the difference in the Terminology section. As
I can see from grepping the document, it consistently uses "Upstream PE"
(Upstream ASBR is used once).

>
> -- Section 3.1.6 --
> Could the "BFD Discreminator" attribute be used for other purpose than th=
is
> document? If so, then why not specifying it in *another* document?
>
> Should this document clearly state that it does not define any TLV ?
>
GIM>> Added a note in Section 7.3 BFD Discriminator Optional TLV Type:
NEW TEXT:
No optional TLV types defined at the creation of the registry.

>
> =3D=3D NITS =3D=3D
>
> As I am probably not the only reader have difficulties to remember RFC
> contents
> by their number, may I suggest to prefix the RFC numbers with their title=
s
> ?
> Esp in the introduction ;-)
>
GIM>> I understand the challenge that manner of using references might
present. In the Abstract RFC 8562 is referenced by both number and its full
title. I'm concerned that doing that in the body of a document might
inflate the size. I use HTMLized version that conveniently links the
reference and the referenced document.

--0000000000003d8f2f05b6eeeb83
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<div dir=3D"ltr"><div dir=3D"ltr">Hi Eric,<div>apologies for the belated re=
sponse. Please find my answers below in-lined tagged by GIM&gt;&gt;.</div><=
div><br></div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gma=
il_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Dec 16, 2020 at 2:0=
5 AM =C3=89ric Vyncke via Datatracker &lt;<a href=3D"mailto:noreply@ietf.or=
g">noreply@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">=C3=89ric Vyncke has entered the following ballot positi=
on for<br>
draft-ietf-bess-mvpn-fast-failover-13: Abstain<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
Thank you for the work put into this document.<br>
<br>
I have balloted ABSTAIN in the sense of &quot;I oppose this document but un=
derstand<br>
that others differ and am not going to stand in the way of the others.&quot=
; because<br>
of the use outside of a node of the IPv4-mapped IPv6 addresses in section<b=
r>
3.1.6.1. A reply on this topic will be welcome.<br>
<br>
St=C3=A9phane in his doc shepherd&#39;s write up states that no implementat=
ion is known<br>
for a document born in 2008... Does the IETF really want to have this on th=
e<br>
proposed standards track ?<br>
<br>
Please find below my ABSTAIN point, some non-blocking COMMENT points (but<b=
r>
replies would be appreciated), and one nits.<br>
<br>
I hope that this helps to improve the document,<br>
<br>
Regards,<br>
<br>
-=C3=A9ric<br>
<br>
=3D=3D ABSTAIN =3D=3D<br>
-- Section 3.1.6.1 --<br>
I appreciate that the BFD WG relies on &quot;::ffff:<a href=3D"http://127.0=
.0.0/104" rel=3D"noreferrer" target=3D"_blank">127.0.0.0/104</a>&quot; but =
those<br>
IPv4-mapped IPv6 addresses are assumed to never leave a node and should nev=
er<br>
be transmitted over the Internet (see<br>
<a href=3D"https://tools.ietf.org/html/rfc5156#section-2.2" rel=3D"noreferr=
er" target=3D"_blank">https://tools.ietf.org/html/rfc5156#section-2.2</a>).=
 This is the cause of my<br>
ABSTAIN. As the inner packet is sent over a tunnel, why not using the a<br>
link-local address or the ff02::1 link-local multicast group ?<br></blockqu=
ote><div>GIM&gt;&gt; This text has been updated. Please let me know if the =
new text is acceptable:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0o =C2=A0when =
transmitting BFD Control packets MUST set the IP destination<br>=C2=A0 =C2=
=A0 =C2=A0 address of the inner IP header to the internal loopback address<=
br>=C2=A0 =C2=A0 =C2=A0 <a href=3D"http://127.0.0.1/32">127.0.0.1/32</a> fo=
r IPv4 [RFC1122].=C2=A0 For IPv6, it MUST use the<br><div>=C2=A0 =C2=A0 =C2=
=A0 loopback address ::1/128 [RFC4291].=C2=A0</div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex">
<br>
=3D=3D COMMENTS =3D=3D<br>
<br>
-- Section 2.3 --<br>
The use of &quot;upstream&quot; and &quot;Upstream&quot; could be confusing=
... The latter could<br>
have been &quot;Upstream PE/ABSR&quot; (often used later in the document) o=
r &quot;ingress<br>
node&quot;<br></blockquote><div>GIM&gt;&gt; We&#39;ve tried to clarify the =
difference in the Terminology section. As I can see from grepping=C2=A0the =
document, it consistently uses &quot;Upstream PE&quot; (Upstream ASBR is us=
ed once).</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
-- Section 3.1.6 --<br>
Could the &quot;BFD Discreminator&quot; attribute be used for other purpose=
 than this<br>
document? If so, then why not specifying it in *another* document?<br>
<br>
Should this document clearly state that it does not define any TLV ?<br></b=
lockquote><div>GIM&gt;&gt; Added a note in Section 7.3 BFD Discriminator Op=
tional TLV Type:</div><div>NEW TEXT:</div><div>No optional TLV types define=
d at the creation of the registry.=C2=A0</div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">
<br>
=3D=3D NITS =3D=3D<br>
<br>
As I am probably not the only reader have difficulties to remember RFC cont=
ents<br>
by their number, may I suggest to prefix the RFC numbers with their titles =
?<br>
Esp in the introduction ;-)<br></blockquote><div>GIM&gt;&gt; I understand t=
he challenge that manner of using references might present. In the Abstract=
 RFC 8562 is referenced by both number and its full title. I&#39;m concerne=
d that doing that in the body of a document might inflate the size. I use H=
TMLized=C2=A0version that conveniently links the reference and the referenc=
ed document.</div></div></div>

--0000000000003d8f2f05b6eeeb83--


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Date: Thu, 17 Dec 2020 15:52:48 +0000 (UTC)
From: Reshad Rahman <reshad@yahoo.com>
Reply-To: Reshad Rahman <reshad@yahoo.com>
To: Jeffrey Haas <jhaas@pfrc.org>, Alvaro Retana <aretana.ietf@gmail.com>
Cc: The IESG <iesg@ietf.org>, "draft-ietf-bess-mvpn-fast-failover@ietf.org" <draft-ietf-bess-mvpn-fast-failover@ietf.org>,  "bess-chairs@ietf.org" <bess-chairs@ietf.org>,  "bess@ietf.org" <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>,  "bfd-chairs@ietf.org" <bfd-chairs@ietf.org>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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=20
Thanks Alvaro, Jeff. Please see inline.
=20
 On 2020-12-16 4:21 p.m., Jeffrey Haas wrote:
 =20
 Alvaro,

Thanks for drawing our attention to this document. =20

On Tue, Dec 15, 2020 at 03:09:54PM -0800, Alvaro Retana via Datatracker wro=
te:
=20
 Alvaro Retana has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: Discuss

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

(1) This document describes several methods to determine the status of a
tunnel (in =C2=A73), none of which "provide a "fast failover" solution when=
 used
alone, but can be used together with the mechanism described in Section 4"
(=C2=A71).  =C2=A73 also says this:

   An implementation may support any combination of the methods
   described in this section and provide a network operator with control
   to choose which one to use in the particular deployment.

While =C2=A73.1 is clear in the fact that it is not a requirement for all
downstream PEs to use the same mechanism, there are no guidelines to aid th=
e
operator to chose which mechanism to use.  Some cases may be obvious (e.g.
=C2=A73.1.3 applies to tunnels of a specific type), but others are not.  I =
would
like to see deployment considerations related to the advantages/disadvantag=
es
that each method may have in specific situations (including their possible
combination).


(2) The BFD Discriminator Attribute has a very narrow application in this
document when compared to the potential other uses given the extensibility
possibilities related to bootstrapping BFD.  I have serious concerns about
the attribute being defined in this document, amongst a series of other
mechanisms.
=20
 I have the following comments about the BGP Path Attribute in question:

- BGP Packet space is sometimes at a premium.  The initial 3 octet reserved
  padding should be removed.
- The TLVs having a required length of multiples of 4 similarly are space
  wasting.
- The attribute does not make adequate provision for more than one type of =
a
  BFD Mode.  This likely limits the general purpose re-use of this attribut=
e
  for other purposes.
- The length handling text is likely not correct:
  "The BFD Discriminator attribute MUST be considered malformed if its
   length is not a non-zero multiple of four."
  The implication is a length of four, which would have no BFD
  Discriminator, should be considered a valid PDU.  Note that the length
  considerations are further compounded by the padding issue for optional
  sub-tlvs in the prior point.

Since a BFD discriminator is 4-octets, I'm curious as to what discussion th=
e
working group may have had with regard to using a BGP Extended Community
instead?  In particular, the BGP Extended Community's Transitive bit might
be useful in many multicast VPN scenarios operating over a single AS to
limit the distribution scope of this Discriminator.

The IANA allocation strategies for the Path Attribute and the Optional
Sub-TLVs seems reasonable.  Note that Experimental code points have proven
to be poorly used in BGP and that their use in the public Internet may
result in unexpected discard of the attribute.


=20
 (2a) The tunnel can be monitored without the new BGP Attribute (assuming
proper configuration of course).  Why is that option is not even mentioned =
in
the document?

In fact, the document recommends deleting the BFD session if the Attribute =
is
not present.  Why is that recommendation in place, and what are the cases w=
hen
it can not be followed?


(2b) The fact that BFD monitoring can be achieved without the new attribute
makes me think that the bootstrapping of BFD using BGP would be better serv=
ed
in a document produced by the BFD WG.  One of the editors has expressed the
same opinion [1] [2].  Has a discussion taken place in the BFD WG (or at le=
ast
with the Chairs) about this work?  Why was it not taken up there?


[1] https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT=
1c/
[2] https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-96-bess.html
=20
 I will not speak for Reshad, but I don't recall this issue.  I may simply =
be
forgetting the e-mail brought to the list, if so.=20
=20
I tried to dig this up and here's the summarized history:
=20
 There was some discussion right after IETF96 (I was at the BESS meeting):=
=20
https://mailarchive.ietf.org/arch/msg/rtg-bfd/-D0iRI2aMSD9tkMWGObsmKGiXow/
=20
=20
Greg did bring this draft to the attention of the BFD WG in 2018 but there =
was no discussion:
=20
=20
https://mailarchive.ietf.org/arch/msg/rtg-bfd/wQOhY6p9L3Z7f29VpNx_yRsCTZg/
=20
AFAIK BFD WG wasn't involved in WGLC.=20
Note that draft-ietf-bess-evpn-bfd reuses the mechanism for signaling BFD d=
iscriminator.

Regards,=20
Reshad.
=20
=20
 The meta desire here is that communication of the BFD Discriminator for p2=
mp
sessions requires protocol help - in this case BGP.  While this could also
be discovered via provisioning, that would limit the flexibility of the
deployment of this feature.

For this specific internet-draft's purpose, dissemination of the
Discriminator is tightly scoped.  The fact that this happens under an
AFI/SAFI that is not expected to hit general purpose Internet routes limits
the blast radius of its use.  However, as you note, Alvaro, there may be
more general purpose desire to use this attribute for.

=20
 (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be considered malf=
ormed if
its length is not a non-zero multiple of four."  Ok, except that the
specification of the attribute doesn't mention the length (only the length =
of
the TLVs).  Please specify the length and any considerations related to the
Extended Length bit.  Also, given that this is a new attribute, with an
unspecified potential number of TLVs, and that the length is apparently
unbounded, all leading to the potential need for extended messages, please
specify how to handle peers that cannot accommodate more than 4k octet
messages (rfc8654).
=20
 Note: I wouldn't put special requirements here on the Extended Length bit.
That's core RFC 4271 Path Attribute behavior.

Similarly, overflow of Path Attributes is a general BGP consideration and i=
t
is inapropriate to require this document to solve that.


-- Jeff
=20
=20
------=_Part_1214633_390820262.1608220368880
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<html><head></head><body><div class=3D"ydpbdb00a85yahoo-style-wrap" style=
=3D"font-family:courier new, courier, monaco, monospace, sans-serif;font-si=
ze:13px;"><div id=3D"ydpbdb00a85yiv4548558956"><div>
    <p><font size=3D"-1">Thanks Alvaro, Jeff. Please see inline.</font><br =
clear=3D"none">
    </p>
    <div class=3D"ydpbdb00a85yiv4548558956moz-cite-prefix">On 2020-12-16 4:=
21 p.m., Jeffrey Haas
      wrote:<br clear=3D"none">
    </div>
    <blockquote type=3D"cite">
      <pre class=3D"ydpbdb00a85yiv4548558956moz-quote-pre">Alvaro,

Thanks for drawing our attention to this document. =20

On Tue, Dec 15, 2020 at 03:09:54PM -0800, Alvaro Retana via Datatracker wro=
te:
</pre>
      <blockquote type=3D"cite">
        <pre class=3D"ydpbdb00a85yiv4548558956moz-quote-pre">Alvaro Retana =
has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: Discuss

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to <a shape=3D"rect" class=3D"ydpbdb00a85yiv4548558956moz-txt-=
link-freetext" href=3D"https://www.ietf.org/iesg/statement/discuss-criteria=
.html" rel=3D"nofollow" target=3D"_blank">https://www.ietf.org/iesg/stateme=
nt/discuss-criteria.html</a>
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
<a shape=3D"rect" class=3D"ydpbdb00a85yiv4548558956moz-txt-link-freetext" h=
ref=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/=
" rel=3D"nofollow" target=3D"_blank">https://datatracker.ietf.org/doc/draft=
-ietf-bess-mvpn-fast-failover/</a>



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

(1) This document describes several methods to determine the status of a
tunnel (in =C2=A73), none of which "provide a "fast failover" solution when=
 used
alone, but can be used together with the mechanism described in Section 4"
(=C2=A71).  =C2=A73 also says this:

   An implementation may support any combination of the methods
   described in this section and provide a network operator with control
   to choose which one to use in the particular deployment.

While =C2=A73.1 is clear in the fact that it is not a requirement for all
downstream PEs to use the same mechanism, there are no guidelines to aid th=
e
operator to chose which mechanism to use.  Some cases may be obvious (e.g.
=C2=A73.1.3 applies to tunnels of a specific type), but others are not.  I =
would
like to see deployment considerations related to the advantages/disadvantag=
es
that each method may have in specific situations (including their possible
combination).


(2) The BFD Discriminator Attribute has a very narrow application in this
document when compared to the potential other uses given the extensibility
possibilities related to bootstrapping BFD.  I have serious concerns about
the attribute being defined in this document, amongst a series of other
mechanisms.
</pre>
      </blockquote>
      <pre class=3D"ydpbdb00a85yiv4548558956moz-quote-pre">I have the follo=
wing comments about the BGP Path Attribute in question:

- BGP Packet space is sometimes at a premium.  The initial 3 octet reserved
  padding should be removed.
- The TLVs having a required length of multiples of 4 similarly are space
  wasting.
- The attribute does not make adequate provision for more than one type of =
a
  BFD Mode.  This likely limits the general purpose re-use of this attribut=
e
  for other purposes.
- The length handling text is likely not correct:
  "The BFD Discriminator attribute MUST be considered malformed if its
   length is not a non-zero multiple of four."
  The implication is a length of four, which would have no BFD
  Discriminator, should be considered a valid PDU.  Note that the length
  considerations are further compounded by the padding issue for optional
  sub-tlvs in the prior point.

Since a BFD discriminator is 4-octets, I'm curious as to what discussion th=
e
working group may have had with regard to using a BGP Extended Community
instead?  In particular, the BGP Extended Community's Transitive bit might
be useful in many multicast VPN scenarios operating over a single AS to
limit the distribution scope of this Discriminator.

The IANA allocation strategies for the Path Attribute and the Optional
Sub-TLVs seems reasonable.  Note that Experimental code points have proven
to be poorly used in BGP and that their use in the public Internet may
result in unexpected discard of the attribute.


</pre>
      <blockquote type=3D"cite">
        <pre class=3D"ydpbdb00a85yiv4548558956moz-quote-pre">(2a) The tunne=
l can be monitored without the new BGP Attribute (assuming
proper configuration of course).  Why is that option is not even mentioned =
in
the document?

In fact, the document recommends deleting the BFD session if the Attribute =
is
not present.  Why is that recommendation in place, and what are the cases w=
hen
it can not be followed?


(2b) The fact that BFD monitoring can be achieved without the new attribute
makes me think that the bootstrapping of BFD using BGP would be better serv=
ed
in a document produced by the BFD WG.  One of the editors has expressed the
same opinion [1] [2].  Has a discussion taken place in the BFD WG (or at le=
ast
with the Chairs) about this work?  Why was it not taken up there?


[1] <a shape=3D"rect" class=3D"ydpbdb00a85yiv4548558956moz-txt-link-freetex=
t" href=3D"https://mailarchive.ietf.org/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_w=
A0JC3CT1c/" rel=3D"nofollow" target=3D"_blank">https://mailarchive.ietf.org=
/arch/msg/rtg-bfd/T1jVpgyXuPatTpuD_wA0JC3CT1c/</a>
[2] <a shape=3D"rect" class=3D"ydpbdb00a85yiv4548558956moz-txt-link-freetex=
t" href=3D"https://tools.ietf.org/wg/bess/minutes?item=3Dminutes-96-bess.ht=
ml" rel=3D"nofollow" target=3D"_blank">https://tools.ietf.org/wg/bess/minut=
es?item=3Dminutes-96-bess.html</a>
</pre>
      </blockquote>
      <pre class=3D"ydpbdb00a85yiv4548558956moz-quote-pre">I will not speak=
 for Reshad, but I don't recall this issue.  I may simply be
forgetting the e-mail brought to the list, if so.</pre>
    </blockquote>
    <p><font size=3D"-1">I tried to dig this up and here's the summarized
        history:<br clear=3D"none">
      </font></p>
    <div dir=3D"ltr" data-setdir=3D"false"><font size=3D"-1">There was some=
 discussion right after IETF96 (I was at
        the BESS meeting):</font></div>
    <p><font size=3D"-1"><a shape=3D"rect" class=3D"ydpbdb00a85yiv454855895=
6moz-txt-link-freetext" href=3D"https://mailarchive.ietf.org/arch/msg/rtg-b=
fd/-D0iRI2aMSD9tkMWGObsmKGiXow/" rel=3D"nofollow" target=3D"_blank">https:/=
/mailarchive.ietf.org/arch/msg/rtg-bfd/-D0iRI2aMSD9tkMWGObsmKGiXow/</a><br =
clear=3D"none">
      </font></p>
    <p><font size=3D"-1">Greg did bring this draft to the attention of the
        BFD WG in 2018 but there was no discussion:<br clear=3D"none">
      </font></p>
    <p><font size=3D"-1"><a shape=3D"rect" class=3D"ydpbdb00a85yiv454855895=
6moz-txt-link-freetext" href=3D"https://mailarchive.ietf.org/arch/msg/rtg-b=
fd/wQOhY6p9L3Z7f29VpNx_yRsCTZg/" rel=3D"nofollow" target=3D"_blank">https:/=
/mailarchive.ietf.org/arch/msg/rtg-bfd/wQOhY6p9L3Z7f29VpNx_yRsCTZg/</a></fo=
nt></p>
    <div dir=3D"ltr" data-setdir=3D"false"><font size=3D"-1"><span><br></sp=
an></font></div><div dir=3D"ltr" data-setdir=3D"false"><font size=3D"-1"><s=
pan></span>AFAIK BFD WG wasn't involved in WGLC.</font></div>
    <div><font size=3D"-1"><span><font style=3D"background-color: inherit;"=
 size=3D"-1"><br></font></span></font></div><div><font size=3D"-1"><span><f=
ont style=3D"background-color: inherit;" size=3D"-1">Note that <span>draft-=
ietf-bess-evpn-bfd reuses the mechanism for signaling BFD discriminator.</s=
pan></font></span><br></font></div><div><font size=3D"-1"><br></font></div>=
<div><font size=3D"-1">Regards,</font></div>
    </div></div></div><div class=3D"ydpdf0b3027yiv4548558956yqt4486023898" =
id=3D"ydpdf0b3027yiv4548558956yqtfd73067"><p><font size=3D"-1">Reshad.</fon=
t><br clear=3D"none">
    </p>
    <blockquote type=3D"cite">
      <pre class=3D"ydpdf0b3027yiv4548558956moz-quote-pre">The meta desire =
here is that communication of the BFD Discriminator for p2mp
sessions requires protocol help - in this case BGP.  While this could also
be discovered via provisioning, that would limit the flexibility of the
deployment of this feature.

For this specific internet-draft's purpose, dissemination of the
Discriminator is tightly scoped.  The fact that this happens under an
AFI/SAFI that is not expected to hit general purpose Internet routes limits
the blast radius of its use.  However, as you note, Alvaro, there may be
more general purpose desire to use this attribute for.

</pre>
      <blockquote type=3D"cite">
        <pre class=3D"ydpdf0b3027yiv4548558956moz-quote-pre">(15) =C2=A73.1=
.6: "The BFD Discriminator attribute MUST be considered malformed if
its length is not a non-zero multiple of four."  Ok, except that the
specification of the attribute doesn't mention the length (only the length =
of
the TLVs).  Please specify the length and any considerations related to the
Extended Length bit.  Also, given that this is a new attribute, with an
unspecified potential number of TLVs, and that the length is apparently
unbounded, all leading to the potential need for extended messages, please
specify how to handle peers that cannot accommodate more than 4k octet
messages (rfc8654).
</pre>
      </blockquote>
      <pre class=3D"ydpdf0b3027yiv4548558956moz-quote-pre">Note: I wouldn't=
 put special requirements here on the Extended Length bit.
That's core RFC 4271 Path Attribute behavior.

Similarly, overflow of Path Attributes is a general BGP consideration and i=
t
is inapropriate to require this document to solve that.


-- Jeff
</pre>
    </blockquote>
  </div></body></html>
------=_Part_1214633_390820262.1608220368880--


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To: Greg Mirsky <gregimirsky@gmail.com>
CC: Stephane Litkowski <slitkows.ietf@gmail.com>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>, The IESG <iesg@ietf.org>, BESS <bess@ietf.org>, "draft-ietf-bess-mvpn-fast-failover@ietf.org" <draft-ietf-bess-mvpn-fast-failover@ietf.org>
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--_000_B7C98F057FA643C9858958F17458530Eciscocom_--


From nobody Mon Dec 21 03:19:28 2020
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Éric Vyncke has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-13: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for the work put into this document and for addressing my previous
comments. My previous position is kept below ***ONLY FOR ARCHIVE*** as the
authors have proposed text to fix those issues.

-éric

===FOR ARCHIVE ONLY===

I have balloted ABSTAIN in the sense of "I oppose this document but understand
that others differ and am not going to stand in the way of the others." because
of the use outside of a node of the IPv4-mapped IPv6 addresses in section
3.1.6.1. A reply on this topic will be welcome.

Stéphane in his doc shepherd's write up states that no implementation is known
for a document born in 2008... Does the IETF really want to have this on the
proposed standards track ?

Please find below my ABSTAIN point, some non-blocking COMMENT points (but
replies would be appreciated), and one nits.

I hope that this helps to improve the document,

Regards,

-éric

== ABSTAIN ==
-- Section 3.1.6.1 --
I appreciate that the BFD WG relies on "::ffff:127.0.0.0/104" but those
IPv4-mapped IPv6 addresses are assumed to never leave a node and should never
be transmitted over the Internet (see
https://tools.ietf.org/html/rfc5156#section-2.2). This is the cause of my
ABSTAIN. As the inner packet is sent over a tunnel, why not using the a
link-local address or the ff02::1 link-local multicast group ?

== COMMENTS ==

-- Section 2.3 --
The use of "upstream" and "Upstream" could be confusing... The latter could
have been "Upstream PE/ABSR" (often used later in the document) or "ingress
node"

-- Section 3.1.6 --
Could the "BFD Discreminator" attribute be used for other purpose than this
document? If so, then why not specifying it in *another* document?

Should this document clearly state that it does not define any TLV ?

== NITS ==

As I am probably not the only reader have difficulties to remember RFC contents
by their number, may I suggest to prefix the RFC numbers with their titles ?
Esp in the introduction ;-)




From nobody Mon Dec 21 05:42:42 2020
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To: Greg Mirsky <gregimirsky@gmail.com>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Greg,

On Sun, Dec 20, 2020 at 04:25:21PM -0800, Greg Mirsky wrote:
> GIM>> In Section 7.2 we're requesting IANA to create a new sub-registry.
> New types of a BFD session can be bootstrapped using the BGP BFD
> Discriminator attribute. For example, draft-ietf-bess-evpn-bfd
> <https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-bfd/?include_text=1> may
> introduce a new BFD Mode value. Would you suggest larger field for BFD Mode
> or an alternative method to signal the type of the BFD session to which the
> value in the BFD Discriminator field is applicable? I thought that, in some
> cases, a new value for p2mp with Active Tail Unsolicited Notifications or
> p2mp Active Tail with Polling would be added.

The property I'm talking about here is that the BFD Discriminator attribute
is not repeating.  You can have exactly one BFD mode in the Path Attribute.

If the intent was to permit more than one type, the BFD Mode would be
followed by a length field - likely 2 octets long.



> 
> > - The length handling text is likely not correct:
> >   "The BFD Discriminator attribute MUST be considered malformed if its
> >    length is not a non-zero multiple of four."
> >   The implication is a length of four, which would have no BFD
> >   Discriminator, should be considered a valid PDU.  Note that the length
> >   considerations are further compounded by the padding issue for optional
> >   sub-tlvs in the prior point.
> >
> GIM>> Thank you for pointing this case out. I agree, that is not what we
> wanted. Following updates noted above the new text is as follows:
> NEW TEXT:
>    The BFD Discriminator attribute MUST be considered malformed if its
>    length is smaller than five octets or the value of the BFD Mode field
>    is unrecognized.  If the attribute is deemed to be malformed, the
>    UPDATE message SHALL be handled using the approach of Attribute
>    Discard per [RFC7606].

The 5 octet minimum length is probably worth having as a condition.

The unrecognized doesn't follow BGP philosophy very well.  Incremental
deployment of BGP features often requires some devices that are simply
transporting the routes, but not utilizing them, to pass things they don't
fully understand.

I suggest dropping the "or the value of the BFD Mode field is unrecognized".

Having text that says "if Optional TLVs are present, but not well formed,
the entire Path Attribute is malformed and should be handled using Attribute
Discard".

The implication is that if there's more than one BFD Discriminator that any
BFD Mode TLV (if the change is made above for multiple) that is malformed is
reason to discard the entire feature.

> > Since a BFD discriminator is 4-octets, I'm curious as to what discussion
> > the
> > working group may have had with regard to using a BGP Extended Community
> > instead?  In particular, the BGP Extended Community's Transitive bit might
> > be useful in many multicast VPN scenarios operating over a single AS to
> > limit the distribution scope of this Discriminator.
> >
> GIM>> I agree that the BGP Extended Community attribute can address the
> immediate problem and be used to bootstrap a p2mp BFD session. It would
> even have space for the BFD Mode field. But because the length of the BFD
> Extended Communities attribute is fixed, it seems that no further
> extensions (e.g., providing the MultipointHead's source IP address) be
> possible.

There we go - a motivation. :-)


-- Jeff


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To: Reshad Rahman <reshad@yahoo.com>, Jeffrey Haas <jhaas@pfrc.org>
Cc: Stephane Litkowski <slitkows.ietf@gmail.com>, "bfd-chairs@ietf.org" <bfd-chairs@ietf.org>,  "bess-chairs@ietf.org" <bess-chairs@ietf.org>,  "draft-ietf-bess-mvpn-fast-failover@ietf.org" <draft-ietf-bess-mvpn-fast-failover@ietf.org>, The IESG <iesg@ietf.org>,  "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Reshad/Jeff:

Hi! =C2=A0Thanks for chiming in!

>From your replies, I'm not sure if you think the BFD WG should have
been involved more, or if you agree that it may be better to have a
general purpose attribute like this one developed in BFD, or if you
are ok with the current work. ?? =C2=A0 With your bfd-chair hat, of course.

Thanks!

Alvaro.




On December 17, 2020 at 10:52:50 AM, Reshad Rahman wrote:
> On 2020-12-16 4:21 p.m., Jeffrey Haas wrote:
> > On Tue, Dec 15, 2020 at 03:09:54PM -0800, Alvaro Retana wrote:


> > > (2b) The fact that BFD monitoring can be achieved without the new
> > > attribute makes me think that the bootstrapping of BFD using BGP woul=
d
> > > be better served in a document produced by the BFD WG. One of the
> > > editors has expressed the same opinion [1] [2]. Has a discussion take=
n
> > > place in the =C2=A0BFD WG (or at least with the Chairs) about this wo=
rk? Why
> > > was it not taken up there?
> >
...
> > >
> > I will not speak for Reshad, but I don't recall this issue. I may simpl=
y
> > be forgetting the e-mail brought to the list, if so.
>
> I tried to dig this up and here's the summarized history:
>
> There was some discussion right after IETF96 (I was at the BESS meeting):
>
> https://mailarchive.ietf.org/arch/msg/rtg-bfd/-D0iRI2aMSD9tkMWGObsmKGiXow=
/
>
> Greg did bring this draft to the attention of the BFD WG in 2018 but ther=
e
> was no discussion:
>
> https://mailarchive.ietf.org/arch/msg/rtg-bfd/wQOhY6p9L3Z7f29VpNx_yRsCTZg=
/
>
> AFAIK BFD WG wasn't involved in WGLC.
>
> Note that draft-ietf-bess-evpn-bfd reuses the mechanism for signaling BFD
> discriminator.
>
> Regards,
>
> Reshad.
>
>
> > The meta desire here is that communication of the BFD Discriminator for
> > p2mp sessions requires protocol help - in this case BGP. While this cou=
ld
> > also be discovered via provisioning, that would limit the flexibility o=
f
> > the deployment of this feature.
> >
> > For this specific internet-draft's purpose, dissemination of the
> > Discriminator is tightly scoped. The fact that this happens under an AF=
I/
> > SAFI that is not expected to hit general purpose Internet routes limits
> > the blast radius of its use. However, as you note, Alvaro, there may be
> > more general purpose desire to use this attribute for.


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From: Jeffrey Haas <jhaas@pfrc.org>
To: Alvaro Retana <aretana.ietf@gmail.com>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Álvaro,

On Mon, Dec 21, 2020 at 08:00:35AM -0800, Alvaro Retana wrote:
> From your replies, I'm not sure if you think the BFD WG should have
> been involved more, or if you agree that it may be better to have a
> general purpose attribute like this one developed in BFD, or if you
> are ok with the current work. ??   With your bfd-chair hat, of course.

The BFD RFC series makes it pretty clear that BFD will often require help
for bootstrapping or discovering sessions.  Part of our charter is to help
review the work from other Working Groups when they do that.  So, it's
appropriate to flag it for BFD WG review minimally as part of WGLC.

In this case, the responses you're seeing from me have a bit more to do with
my background in BGP rather than BFD. :-)  I would heartily suggest that IDR
get a chance to look at the mechanism in more detail since it likely will be
used in a more general fashion for other protocol extensions in BGP.

What I think we're seeing is the usual impedence mismatch in BESS where work
eventually moves to move general BGP mechanisms and additional IDR scrutiny
was needed.

My recommendation is to extend WGLC to BFD and IDR.

My personal opinion, not speaking as BFD chair, is that the mechanism is
generally fine and in need of the minimal PDU encoding advice I've already
given.

-- jeff


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

        Title           : Multicast VPN Fast Upstream Failover
        Authors         : Thomas Morin
                          Robert Kebler
                          Greg Mirsky
	Filename        : draft-ietf-bess-mvpn-fast-failover-14.txt
	Pages           : 24
	Date            : 2020-12-21

Abstract:
   This document defines Multicast Virtual Private Network (VPN)
   extensions and procedures that allow fast failover for upstream
   failures by allowing downstream Provider Edges (PEs) to consider the
   status of Provider-Tunnels (P-tunnels) when selecting the upstream PE
   for a VPN multicast flow.  The fast failover is enabled by using RFC
   8562 Bidirectional Forwarding Detection (BFD) for Multipoint Networks
   and the new BGP Attribute - BFD Discriminator.  Also, the document
   introduces a new BGP Community, Standby PE, extending BGP Multicast
   VPN routing so that a C-multicast route can be advertised toward a
   Standby Upstream PE.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-mvpn-fast-failover-14
https://datatracker.ietf.org/doc/html/draft-ietf-bess-mvpn-fast-failover-14

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-mvpn-fast-failover-14


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 21 Dec 2020 09:33:03 -0800
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Subject: Re: [bess] Benjamin Kaduk's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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--00000000000060c31e05b6fcda49
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Hi Ben, et al.,
I've uploaded version -14 of the draft that includes all the updates we've
discussed. Please let me know if you find this version satisfactory
addresses your DISCUSS and COMMENTS.

Regards,
Greg

A new version of I-D, draft-ietf-bess-mvpn-fast-failover-14.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:           draft-ietf-bess-mvpn-fast-failover
Revision:       14
Title:          Multicast VPN Fast Upstream Failover
Document date:  2020-12-21
Group:          bess
Pages:          24
URL:
https://www.ietf.org/archive/id/draft-ietf-bess-mvpn-fast-failover-14.txt
Status:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
Htmlized:
https://datatracker.ietf.org/doc/html/draft-ietf-bess-mvpn-fast-failover
Htmlized:
https://tools.ietf.org/html/draft-ietf-bess-mvpn-fast-failover-14
Diff:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bess-mvpn-fast-failover-14

Abstract:
   This document defines Multicast Virtual Private Network (VPN)
   extensions and procedures that allow fast failover for upstream
   failures by allowing downstream Provider Edges (PEs) to consider the
   status of Provider-Tunnels (P-tunnels) when selecting the upstream PE
   for a VPN multicast flow.  The fast failover is enabled by using RFC
   8562 Bidirectional Forwarding Detection (BFD) for Multipoint Networks
   and the new BGP Attribute - BFD Discriminator.  Also, the document
   introduces a new BGP Community, Standby PE, extending BGP Multicast
   VPN routing so that a C-multicast route can be advertised toward a
   Standby Upstream PE.




Please note that it may take a couple of minutes from the time of submissio=
n
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat



On Fri, Dec 18, 2020 at 6:34 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Ben,
> many thanks for your kind considerations of the proposed updates. Please
> find my follow-up notes in-lined under the GIM2>> tag below.
> Attached is the diff that highlights all the updates including the ones
> that address comments by Martin, Barry, Roman, and Murray.
> I will upload the new version if you agree to the latest proposed updates=
.
>
> Regards,
> Greg
>
> On Thu, Dec 17, 2020 at 6:02 PM Benjamin Kaduk <kaduk@mit.edu> wrote:
>
>> Hi Greg,
>>
>> Also inline (though there's not much left to say)
>>
>> On Wed, Dec 16, 2020 at 12:17:55PM -0800, Greg Mirsky wrote:
>> > Hi Ben,
>> > thank you for the review, and your detailed comments and direct
>> questions.
>> > Please find my answers and proposed updates in-lined below under the
>> GIM>>
>> > tag.
>> > Attached, please find, the diff highlighting the updates and the new
>> > working version of the draft.
>> >
>> > Regards,
>> > Greg
>> >
>> > On Mon, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker <
>> > noreply@ietf.org> wrote:
>> >
>> > > Benjamin Kaduk has entered the following ballot position for
>> > > draft-ietf-bess-mvpn-fast-failover-13: Discuss
>> > >
>> > > When responding, please keep the subject line intact and reply to al=
l
>> > > email addresses included in the To and CC lines. (Feel free to cut
>> this
>> > > introductory paragraph, however.)
>> > >
>> > >
>> > > Please refer to
>> https://www.ietf.org/iesg/statement/discuss-criteria.html
>> > > for more information about IESG DISCUSS and COMMENT positions.
>> > >
>> > >
>> > > The document, along with other ballot positions, can be found here:
>> > > https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>> > >
>> > >
>> > >
>> > > --------------------------------------------------------------------=
--
>> > > DISCUSS:
>> > > --------------------------------------------------------------------=
--
>> > >
>> > > Let's talk about what the requirements are for consistency across PE=
s
>> in
>> > > the algorithm for selecting the Primary Upstream PE.  Section 4 note=
s
>> > > that "all the PEs of that MVPN [are required] to follow the same UMH
>> > > selection procedure", but leaves the option of non-revertive behavio=
r
>> as
>> > > something that "MAY also be supported by an implementation", without
>> > > requirement for consistency across all PEs.  It seems to me that if
>> some
>> > > PEs use non-revertive behavior and others do not, then they will
>> > > disagree as to which PE is the Primary (or active) PE in some cases,
>> > > which seems to conflict with the initial guidance that all PEs neede=
d
>> to
>> > > pick the same one.  Is it perhaps that the PEs need to agree on whic=
h
>> PE
>> > > is to be advertised as Primary but not necessarily to actually be
>> using
>> > > that one for traffic?  Or am I missing something?
>> > >
>> > GIM>> Thank you for pointing out this inconsistency. I agree that the
>> text
>> > needs some tightening. Below is the proposed update:
>> > OLD TEXT:
>> >    Such behavior is referred to as
>> >    "revertive" behavior and MUST be supported.  Non-revertive behavior
>> >    refers to the behavior of continuing to select the backup PE as the
>> >    UMH even after the Primary has come up.  This non-revertive behavio=
r
>> >    MAY also be supported by an implementation and would be enabled
>> >    through some configuration.
>> > NEW TEXT:
>> > Such behavior is referred to as
>> >    "revertive" behavior and MUST be supported.  Non-revertive behavior
>> >    refers to the behavior of continuing to select the backup PE as the
>> >    UMH even after the Primary has come up.  This non-revertive behavio=
r
>> >    MAY also be supported by an implementation and would be enabled
>> >    through some configuration.  Selection of the behavior, revertive o=
r
>> >    non-revertive, is an operational issue, but it MUST be consistent o=
n
>> >    all PEs in the given MVPN.
>>
>> Looks good; I'm glad this was just a simple change.
>>
>> > >
>> > >
>> > > --------------------------------------------------------------------=
--
>> > > COMMENT:
>> > > --------------------------------------------------------------------=
--
>> > >
>> > > Section 1
>> > >
>> > >    Section 3 describes local procedures allowing an egress PE (a PE
>> > >    connected to a receiver site) to take into account the status of
>> > >    P-tunnels to determine the Upstream Multicast Hop (UMH) for a giv=
en
>> > >    (C-S, C-G).  [...]
>> > >
>> > > Does it also apply to (C-*, C-G)?  (I'll just mention it once, but t=
he
>> > > handling seems to be somewhat inconsistent throughout the document,
>> with
>> > > (C-*,C-G) getting mentioned sometimes but not always, and no pattern
>> > > obvious to me for when it is or is not included.  I think I see some
>> > > instances where (C-*, C-G) does not make sense, so it would probably
>> not
>> > > be a universal replacement.)
>> > >
>> > GIM>> Yes, it cannot be used interchangeably. We've followed the
>> notation
>> > as defined in the last paragraph of Section 3.1 RFC 6513:
>> >    ... C-group address would be a group address in a
>> >    VPN's address space.  A C-tree is a multicast distribution tree
>> >    constructed and maintained by the PIM C-instances.  A C-flow is a
>> >    stream of multicast packets with a common C-source address and a
>> >    common C-group address.  We will use the notation "(C-S,C-G)" to
>> >    identify specific C-flows.  If a particular C-tree is a shared tree
>> >    (whether unidirectional or bidirectional) rather than a source-
>> >    specific tree, we will sometimes speak of the entire set of flows
>> >    traveling that tree, identifying the set as "(C-*,C-G)".
>> > It is my understanding, that the one reference to (C-*,C-G) in the
>> draft is
>> > in Section 3 bullet B:
>> >           The S-PMSI can be advertised only after the
>> >           Upstream PE receives a C-multicast route for (C-S, C-G)/(C-*=
,
>> >           C-G) to be carried over the advertised S-PMSI.
>> > The reference is not an introduced text but an informational summary o=
f
>> > Section 5.1 RFC 6513. The text preceding that reference is intended to
>> > clarify its status:
>> >   There are three options specified in Section 5.1 of [RFC6513] for a
>> >    downstream PE to select an Upstream PE.
>> > Would you suggest an additional text?
>>
>> I don't see a need for additional text.  Thanks for walking me through i=
t
>> -- I'm pretty sure I had lost track of the fact that the =C2=A73 (and on=
ly)
>> occurrence of "(C-*, C-G)" was in a part that was supposed to be
>> summarizing RFC 6513 by the time I stumbled upon it.  With the extra
>> context it all seems clear.
>>
>> > >
>> > >    Section 5 describes a "hot leaf standby" mechanism that can be us=
ed
>> > >    to improve failover time in MVPN.  The approach combines mechanis=
ms
>> > >    defined in Section 3 and Section 4 has similarities with the
>> solution
>> > >    described in [RFC7431] to improve failover times when PIM routing
>> is
>> > >    used in a network given some topology and metric constraints.
>> > >
>> > > nit: grammar issue around "has similarities with" (maybe needs a
>> leading
>> > > "and"?)
>> > >
>> > GIM>> Thank you. Updated to:
>> > NEW TEXT:
>> >    Section 5 describes a "hot leaf standby" mechanism that can be used
>> >    to improve failover time in MVPN.  The approach combines mechanisms
>> >    defined in Section 3 and Section 4, and has similarities with the
>> >    solution described in [RFC7431] to improve failover times when PIM
>> >    routing is used in a network given some topology and metric
>> >    constraints.
>> > >
>> > >
>> > >    VPNs.  An operator would enable these mechanisms using a method
>> > >    discussed in Section 3 in combination with the redundancy provide=
d
>> by
>> > >    a standby PE connected to the source of the multicast flow, and i=
t
>> is
>> > >    assumed that all PEs in the network would support these mechanism=
s
>> > >    for the procedures to work.  In the case that a BGP implementatio=
n
>> > >
>> > > Is it a matter of "the procedure will not work at all unless all PEs
>> in
>> > > the network support it", or "only the PEs that support it will get t=
he
>> > > benefits of it"?  [The next sentence suggests an anwer...]
>> > >
>> > GIM>> The sentence might be too long. Yes, only PEs that support the n=
ew
>> > Standby PE community and use any of UMH monitoring methods would
>> converge
>> > faster than PEs that don't support both features. Would the re-wording
>> as
>> > below make the text clear:
>> > NEW TEXT:
>> >    An operator would enable these mechanisms using a method
>> >    discussed in Section 3 combined with the redundancy provided by a
>> >    standby PE connected to the multicast flow source.  PEs that suppor=
t
>> >    these mechanisms would converge faster and thus provide a more stab=
le
>> >    multicast service.
>>
>> Yes, that looks pretty crisp -- thanks!
>>
>> > >
>> > > Section 3
>> > >
>> > >    Section 9.1.1 of [RFC6513] are applicable when using I-PMSI
>> > >    P-tunnels.  That document is a foundation for this document, and
>> its
>> > >    processes all apply here.  Section 9.1.1 mandates the use of
>> specific
>> > >    procedures for sending intra-AS I-PMSI A-D Routes.
>> > >
>> > > (nit) the second "Section 9.1.1" is also referring to RFC 6513, not
>> this
>> > > document, which would be the default interpretation of a bare sectio=
n
>> > > reference.
>> >
>> >
>> > > (not-nit) The referenced procedure seems to be about processing, not
>> > > sending, intra-AS I-PMSI A-D routes.  Am I misreading something?
>> > >
>> > GIM>> You are right. The sentence mischaracterizes Section 9.1.1 and
>> has no
>> > informational value. Removed it altogether.
>> >
>> > >
>> > > Section 3.1
>> > >
>> > >    Different factors can be considered to determine the "status" of =
a
>> > >    P-tunnel and are described in the following sub-sections.  The
>> > >    optional procedures described in this section also handle the cas=
e
>> > >    the downstream PEs do not all apply the same rules to define what
>> the
>> > >    status of a P-tunnel is (please see Section 6), and some of them
>> will
>> > >    produce a result that may be different for different downstream
>> PEs.
>> > >
>> > > nit: I think it's better to put a word like "where" in "the case the
>> > > downtream PEs".
>> > >
>> > GIM>> I've tried it like the following:
>> > NEW TEXT:
>> >    The
>> >    optional procedures described in this section also handle the case
>> >    when the downstream PEs do not all apply the same rules to define
>> >    what the status of a P-tunnel is (please see Section 6), and some o=
f
>> >    them will produce a result that may be different for different
>> >    downstream PEs.
>> >
>> > >
>> > > Section 3.1.3
>> > >
>> > >    corresponding P-tunnel MUST be re-evaluated.  If the P-tunnel
>> > >    transitions from Up to Down state, the Upstream PE that is the
>> > >    ingress of the P-tunnel MUST NOT be considered a valid UMH.
>> > >
>> > > (nit?) I'm not sure how much precedent there is for using "valid" in
>> > > this context -- IIUC the previous discussion of this process referre=
d
>> > > only to whether a PE is a candidate for being the UMH.
>> > >
>> > GIM>> I agree, "candidate" is missing here. Proposed update:
>> > NEW TEXT:
>> >    If the P-tunnel
>> >    transitions from Up to Down state, the Upstream PE that is the
>> >    ingress of the P-tunnel MUST NOT be considered as a valid candidate
>> >    UMH.
>> >
>> > >
>> > > Section 3.1.5
>> > >
>> > >    When such a procedure is used, in the context where fast
>> restoration
>> > >    mechanisms are used for the P-tunnels, a configurable timer MUST =
be
>> > >    set on the downstream PE to wait before updating the UMH, to let
>> the
>> > >    P-tunnel restoration mechanism to execute its actions.  An
>> > >    implementation SHOULD use three seconds as the default value for
>> this
>> > >    timer.
>> > >
>> > > How does this interact with the value of the maximum inter-packet
>> time?
>> > > Suppose that I know to expect at least one packet every ten seconds.
>> Do
>> > > I wait ten seconds after receiving the last packet and then another
>> > > three seconds, before engaging in an UMH change?
>> > >
>> > GIM>> This scenario is similar to the use of an active OAM detecting a
>> > network failure. The role of the timer to trigger an action if a certa=
in
>> > number of packets have not arrived. Since the maximum inter-packet tim=
e
>> is
>> > known, a downstream PE has an expectation of receiving a packet within=
 a
>> > time interval large than the maximum inter-packet interval. In practic=
e,
>> > the timer could be set three times the maximum inter-packet interval, =
so
>> > that it expires if three consecutive packets were not received. In the
>> case
>> > you've described, I think that the timer must be set larger than 10
>> > seconds, probably 30+ seconds. Would you suggest any additional text
>> here?
>>
>> I think my uncertainty here is whether the 3 seconds default is intended
>> to
>> be the only waiting period or an additional waiting period after
>> determining that the tunnel is "probably down" but before updating the
>> UMH.
>> (Looking at it again now, the latter is a bit of a strained
>> interpretation.)  That said, your description here suggests that the
>> operative mechanism is to determine that the tunnel is probably down by
>> passing a threshold number of packets that were expected but did not
>> arrive, with some accomodation for jitter in the network if packets are
>> supposed to be arriving very quickly so that "just wait for 3 missed
>> packets" isn't long enough to account for (e.g.) interrupt handling on a
>> forwarder.  So the intended sentiment seems to be something like
>> "Determining that a tunnel is probably down by waiting for enough packet=
s
>> to fail to arrive as expected is a heuristic and operational matter that
>> depends on the maximum inter-packet time.  A timeout of three seconds is=
 a
>> generally suitable default waiting period to ascertain that the tunnel i=
s
>> down, though other values would be needed for atypical conditions."
>
>
>> I would not complain if you kept the original text, though.
>>
> GIM2>> I much appreciate the consideration you gave to the document and
> glad to use the suggested text.
>
>>
>> > >
>> > >    In cases where this mechanism is used in conjunction with the
>> method
>> > >    described in Section 5, no prior knowledge of the rate of the
>> > >    multicast streams is required; downstream PEs can compare recepti=
on
>> > >    on the two P-tunnels to determine when one of them is down.
>> > >
>> > > This feels a little underspecified; is there a reference or more
>> > > guidance that we could give about turning a stream of received packe=
ts
>> > > on one tunnel into a maximum inter-packet time on another tunnel,
>> > > supposedly carrying the same traffic?
>> > >
>> > GIM>> I think that this text refers to 1+1 protection, i.e.,
>> Active-Active
>> > P-tunnels. In that scenario, the determination of the P-tunnel's state
>> can
>> > be done by comparing it to the reception state of the other P-tunnel i=
n
>> the
>> > redundancy group. But there might be corner cases, like a significant
>> delay
>> > in one of P-tunnels, that may need consideration before recommending
>> this
>> > method. I don't think that it is in the scope of the document. Would
>> > appending the paragraph with "The detailed specification of this
>> mechanism
>> > is outside the scope of this document" be acceptable?
>>
>> I think my confusion stems from the first paragraph of the section seemi=
ng
>> to emphasize the dependence on the "maximum inter-packet time", but the
>> best algorithm to use in the 1+1 case seems likely to be different (i.e.=
,
>> one that makes use of the full knowledge of the incoming packet
>> distribution).  So my suggestion would be something more along the lines
>> of
>> "no prior knowledge of the rate or maximum inter-packet time on the
>> multicast streams is required; downstream PEs can compare actual packet
>> reception statistics on the two P-tunnels to determine when one of them =
is
>> down".  (Adding a "details are out of scope of the document" to that wou=
ld
>> be fine, of course.)
>>
> GIM2>> Thanks again for the suggested text.
>
>>
>> > >
>> > > Section 3.1.6
>> > >
>> > >       *  one octet-long field of TLV's Type value (Section 7.3)
>> > >
>> > >       *  one octet-long field of the length of the Value field in
>> octets
>> > >
>> > >       *  variable length Value field.
>> > >
>> > >       The length of a TLV MUST be multiple of four octets.
>> > >
>> > > I assume this is the total length, not the value in the length field=
?
>> > >
>> > GIM>> Correct. Would the following update make it clearer?
>> > NEW TEXT:
>> >       Figure 2 presents the Optional TLV format TLV that
>> >       consists of:
>> >
>> >       *  Type - a one-octet-long field that characterizes the
>> >          interpretation of the Value field (Section 7.3)
>> >
>> >       *  Length - a one-octet-long field equal to the length of the
>> >          Value field in octets
>> >
>> >       *  Value - a variable-length field.
>> >
>> >       The length of a TLV as a whole MUST be multiple of four octets.
>>
>> Yes, that's more clear.  (But given Jeff and Alvaro's comments maybe the
>> whole thing will change anyway.)
>>
>> > >
>> > >    The BFD Discriminator attribute MUST be considered malformed if i=
ts
>> > >    length is not a non-zero multiple of four.  If the attribute
>> > >    considered malformed, the UPDATE message SHALL be handled using t=
he
>> > >    approach of Attribute Discard per [RFC7606].
>> > >
>> > > nit: s/attribute considered/attribute is considered/
>> > >
>> > GIM>> Thank you! Updated text to:
>> > NEW TEXT:
>> >    The BFD Discriminator attribute MUST be considered malformed if its
>> >    length is not a non-zero multiple of four.  If the attribute is
>> >    deemed to be malformed, the UPDATE message SHALL be handled using t=
he
>> >    approach of Attribute Discard per [RFC7606].
>> >
>> > >
>> > > Section 3.1.6.1
>> > >
>> > >    o  MUST periodically transmit BFD Control packets over the x-PMSI
>> > >       P-tunnel after the P-tunnel is considered established.  Note
>> that
>> > >       the methods to declare a P-tunnel has been established are
>> outside
>> > >       the scope of this specification.
>> > >
>> > > Is there a good reference for how to choose the period of
>> transmission?
>> > >
>> > GIM>> Not really. There are many factors that an operator should
>> consider
>> > when configuring the frequency of BFD packets on the MultipointHead
>> system.
>> > One of the aspects to keep in mind is that unlike p2p BFD, there's no
>> > interval negotiation phase in p2mp BFD. As a result, a tail has no
>> > influence over the interval at which the head of the p2mp BFD session
>> > transmits BFD Control messages.
>>
>> Okay.  (Yes, I do remember there was a fair bit of contention in the
>> reviews of the multipoint BFD document relating to the transmission
>> frequency and the potential to overload the network in the absence of
>> feedback ... luckily that was a case where I was able to sit back and
>> watch, and not have to be taking a position.)
>>
>> > >
>> > >    If the tracking of the P-tunnel by using a P2MP BFD session is
>> > >    enabled after the x-PMSI A-D Route has been already advertised, t=
he
>> > >    x-PMSI A-D Route MUST be re-sent with precisely the same attribut=
es
>> > >    as before and the BFD Discriminator attribute included.
>> > >
>> > > Pedantically, it seems like "precisely the same attributes as before=
"
>> > > is incompatible with adding the BFD Discriminator attribute.  Phrasi=
ng
>> > > that discusses "the only change between the previous advertisement a=
nd
>> > > the new advertisement" would not suffer from such a potential issue.
>> > > (And similarly for when the BFD Discriminator attribute is to be
>> > > removed, a couple paragraphs later.)
>> > >
>> > GIM>> Great, thank you. Applied in both cases:
>> > NEW TEXT:
>> >    If the tracking of the P-tunnel by using a P2MP BFD session is
>> >    enabled after the x-PMSI A-D Route has been already advertised, the
>> >    x-PMSI A-D Route MUST be re-sent with the only change between the
>> >    previous advertisement and the new advertisement to be the inclusio=
n
>> >    of the BFD Discriminator attribute.
>> > and
>> >    o  x-PMSI A-D Route MUST be re-sent with the only change between th=
e
>> >       previous advertisement and the new advertisement be the exclusio=
n
>> >       of the BFD Discriminator attribute;
>> >
>> > >
>> > > Section 3.1.6.2
>> > >
>> > >    o  MUST use the source IP address of the BFD Control packet, the
>> > >       value of the BFD Discriminator field, and the x-PMSI Tunnel
>> > >       Identifier [RFC6514] the BFD Control packet was received to
>> > >       properly demultiplex BFD sessions.
>> > >
>> > > nit: missing word around "the BFD Control packet was received" (mayb=
e
>> > > "received on/in"?).
>> > >
>> > GIM>> "on" seems the better option. Updated accordingly.
>> >
>> > >
>> > >    According to [RFC8562], if the downstream PE receives Down or
>> > >    AdminDown in the State field of the BFD Control packet or
>> associated
>> > >    with the BFD session Detection Timer expires, the BFD session is
>> > >
>> > > nit: "the BFD Detection Timer associated with the BFD session expire=
s"
>> > >
>> > GIM>> Thank you for the helpful suggestion. Updated.
>> >
>> > >
>> > >    PE, while others are considered as Standby Upstream PEs.  In such=
 a
>> > >    scenario, when the P-tunnel is considered down, the downstream PE
>> MAY
>> > >    initiate a switchover of the traffic from the Primary Upstream PE
>> to
>> > >    the Standby Upstream PE only if the Standby Upstream PE is deemed
>> > >    available.
>> > >
>> > > I'm not sure that we've defined what it means for an Upstream PE to =
be
>> > > deemed "available', yet.  I guess it's possible that there is not an
>> > > established P-Tunnel between the (selected) Standby Upstream PE and
>> the
>> > > donstream PE, so just using the Up/Down/not-known-to-be-Down status =
of
>> > > that P-tunnel is not an option...
>> > >
>> > GIM>> The wording is sloppy, agree. I think that the intention was to
>> say
>> > "deemed in the Up state". That can be determined using the p2mp BFD
>> session
>> > with Standby Upstream PE acting as its MultipointHead. The proposed
>> update
>> > is as follows:
>> > NEW TEXT:
>> >    In such a scenario, when the P-tunnel is considered
>> >    down, the downstream PE MAY initiate a switchover of the traffic fr=
om
>> >    the Primary Upstream PE to the Standby Upstream PE only if the
>> >    Standby Upstream PE is deemed to be in the Up state.  That MAY be
>> >    determined from the state of a P2MP BFD session with the Standby
>> >    Upstream PE as the MultipointHead.
>> >
>> > >
>> > >    If the downstream PE's P-tunnel is already established when the
>> > >    downstream PE receives the new x-PMSI A-D Route with BFD
>> > >    Discriminator attribute, the downstream PE MUST associate the val=
ue
>> > >    of BFD Discriminator field with the P-tunnel and follow procedure=
s
>> > >    listed above in this section if and only if the x-PMSI A-D Route
>> was
>> > >    properly processed as per [RFC6514], and the BFD Discriminator
>> > >    attribute was validated.
>> > >
>> > > We did not discuss any validation of the BFD Discriminator attribute
>> in
>> > > =C2=A73.1.6; what procedures would this process entail?
>> > >
>> > GIM>> There's, so far, only one validation condition:
>> >
>> > The length of a TLV as a whole MUST be multiple of four octets.
>> >
>> >
>> > > Section 4
>> > >
>> > >    The procedures described below are limited to the case where the
>> site
>> > >    that contains C-S is connected to two or more PEs, though, to
>> > >    simplify the description, the case of dual-homing is described.
>> The
>> > >
>> > > I suggest giving at least some considerations to how to choose betwe=
en
>> > > multiple standby Upstream PEs when there are more than one available=
.
>> > >
>> > GIM>> I understand your idea but that might be a whole new specificati=
on
>> > similar to the selection of UMH from the list of candidates. Perhaps
>> > stating that the selection might use known methods but the specifics a=
re
>> > outside the scope of this document be acceptable? For example (sorry
>> for a
>> > longer quote):
>> > NEW TEXT:
>> >    The procedures described below are limited to the case where the si=
te
>> >    that contains C-S is connected to two or more PEs, though, to
>> >    simplify the description, the case of dual-homing is described.  In
>> >    the case where more than two PEs are connected to the C-s site,
>> >    selection of the Standby PE can be performed using one of the metho=
ds
>> >    of selecting a UMH.  Details of the selection are outside the scope
>> >    of this document.  The procedures require all the PEs of that MVPN =
to
>> >    follow the same UMH selection procedure, as specified in [RFC6513],
>> >    whether the PE selected based on its IP address, hashing algorithm
>> >    described in section 5.1.3 of [RFC6513], or Installed UMH Route.  T=
he
>> >    procedures assume that if a site of a given MVPN that contains C-S =
is
>> >    dual-homed to two PEs, then all the other sites of that MVPN would
>> >    have two unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each wit=
h
>> >    its RD.
>>
>> I can understand that selecting from a list of (more than two) candidate=
s
>> might end up being complicated; I think your text here is sufficient to
>> address my concern, by giving some indication of how the extension to th=
e
>> general case could be performed while acknowledging that it is not fully
>> specified yet.
>>
>> > >
>> > >    procedures require all the PEs of that MVPN to follow the same UM=
H
>> > >    selection procedure, as specified in [RFC6513], whether the PE
>> > >    selected based on its IP address, hashing algorithm described in
>> > >    section 5.1.3 of [RFC6513], or Installed UMH Route.  The procedur=
es
>> > >
>> > > I assume that how the PEs agree on which procedure is in use does no=
t
>> > > involve something being advertised in-band, and is out of scope for
>> this
>> > > document.  But please say so!
>> > >
>> > GIM>> You are right, that is an operational issue and the management
>> > plane's responsibility.
>> > NEW TEXT:
>> > The procedures require all the PEs of that MVPN to
>> >    follow the same UMH selection procedure, as specified in [RFC6513],
>> >    whether the PE selected based on its IP address, the hashing
>> >    algorithm described in section 5.1.3 of [RFC6513], or Installed UMH
>> >    Route.  The consistency of the UMH selection method used among all
>> >    PEs is expected to be provided by the management plane.
>> >
>> > >
>> > >    assume that if a site of a given MVPN that contains C-S is
>> dual-homed
>> > >    to two PEs, then all the other sites of that MVPN would have two
>> > >    unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, each with its R=
D.
>> > >
>> > > nit: s/its RD/its own RD/
>> > >
>> > GIM>> Ack
>> >
>> > > Also, please confirm that the unicast routes are *to* C-S, vs *from*
>> it.
>> > >
>> > GIM>> Though it might be somewhat counterintuitive, in the context of
>> MVPN
>> > "to" is correct.
>>
>> Thanks.
>>
>> > >
>> > > Section 4.1
>> > >
>> > >    o  the NLRI is constructed as the C-multicast route with an RT th=
at
>> > >       identifies the Primary Upstream PE, except that the RD is the
>> same
>> > >       as if the C-multicast route was built using the Standby Upstre=
am
>> > >       PE as the UMH (it will carry the RD associated to the unicast
>> VPN
>> > >       route advertised by the Standby Upstream PE for S and a Route
>> > >       Target derived from the Standby Upstream PE's UMH route's VRF =
RT
>> > >       Import EC);
>> > >
>> > > This part is a bit confusing to me, since the first part says that t=
he
>> > > RT identifies the Primary Upstream PE, but the second part says that
>> the
>> > > RT is derived from the Standy Upstream PE's [stuff].  But I'm happy =
to
>> > > trust you that the [stuff] makes it correct!
>> > >
>> > GIM>> Thank you for putting your trust in our collective thinking.
>> AFAIK,
>> > it works.
>> >
>> > >
>> > > Section 4.2
>> > >
>> > >       when the PE determines (the use of the particular method to
>> detect
>> > >       the failure is outside the scope of this document) that C-S is
>> not
>> > >       reachable through some other PE, the PE SHOULD install VRF PIM
>> > >
>> > > It seems like a forward reference to =C2=A74.3 might be helpful.
>> > >
>> > GIM>> Thank you for your suggestion, the reference is added in the
>> working
>> > version.
>> >
>> > >
>> > >    Section 9.3.2 of [RFC6514], describes the procedures of sending a
>> > >    Source-Active A-D Route as a result of receiving the C-multicast
>> > >    route.  These procedures MUST be followed for both the normal and
>> > >    Standby C-multicast routes.
>> > >
>> > > There is no section 9.3.2 in RFC 6514.  There is a 9.2.3 that looks
>> > > perhaps plausible, though the string "Source-Active" does not appear
>> in
>> > > it.
>> > >
>> > GIM>> Great catch, thank you! I believe that the correct section is in
>> RFC
>> > 6513, not RFC 6514. The former opens with:
>> >    The issue described in Section 9.3.1 is resolved through the use of
>> >    Source Active A-D routes.  In the remainder this section, we provid=
e
>> >    an example of how this works, along with an informal description of
>> >    the procedures.
>> > Would you agree RFC 6513 makes sense?
>>
>> That does look to make a lot more sense than 6514 did!
>>
>> > >
>> > > Section 4.4.2
>> > >
>> > >    Source AS carried in the C-multicast route.  If the match is foun=
d,
>> > >    and the C-multicast route carries the Standby PE BGP Community,
>> then
>> > >    the ASBR MUST perform as follows:
>> > >
>> > > (I assume that there is room for local policy to modify this "MUST",
>> > > e.g., if needed to protect against some form of attack ... perhaps i=
t
>> > > even goes without saying.)
>> > >
>> > GIM>> Indeed. Perhaps the following change makes it more accurate:
>> > NEW TEXT:
>> >    If the match is found,
>> >    and the C-multicast route carries the Standby PE BGP Community, the=
n
>> >    the ASBR implementation that supports this specification MUST be
>> >    configurable to perform as follows:
>> >
>> >    o  if the route was received over iBGP and its LOCAL_PREF attribute
>> >       is set to zero, then it MUST be re-advertised in eBGP with a MED
>> >       attribute (MULTI_EXIT_DISC) set to the highest possible value
>> >       (0xffff)
>> >
>> >    o  if the route was received over eBGP and its MED attribute set to
>> >       0xffff, then it MUST be re-advertised in iBGP with a LOCAL_PREF
>> >       attribute set to zero
>> >
>> >    Other ASBR procedures are applied without modification and, when
>> >    applied, MAY modify the above-listed behavior.
>>
>> Works for me :)
>>
>> > >
>> > > Section 5
>> > >
>> > >    o  Upstream PEs use the "hot standby" optional behavior and thus
>> will
>> > >       forward traffic for a given multicast state as soon as they ha=
ve
>> > >       whether a (primary) BGP C-multicast route or a Standby BGP
>> > >       C-multicast route for that state (or both)
>> > >
>> > > nit: the grammar is a bit weird here, after "as soon as they have";
>> I'm
>> > > not confident that I could make an accurate suggestion for a fix.
>> > >
>> > GIM>> Would with a minor update it all reads better:
>> > NEW TEXT:
>> >       Upstream PEs use the "hot standby" optional behavior and thus wi=
ll
>> >       start forwarding traffic for a given multicast state after they
>> >       have whether a (primary) BGP C-multicast route or a Standby BGP
>> >       C-multicast route for that state (or both)
>>
>> I think that "whether" is not needed (though "either" might work in its
>> stead).
>>
> GIM2>> Yes, it was not the best choice. Below is the newest version:
>     o  Upstream PEs use the "hot standby" optional behavior and thus will
>       start forwarding traffic for a given multicast state after they
>       have a (primary) BGP C-multicast route or a Standby BGP
>       C-multicast route for that state (or both)
>>
>>
>> > >
>> > > Section 6
>> > >
>> > > I could almost see the discussion of duplicate packets as being a
>> > > subsection of the security considerations, though I don't mind leavi=
ng
>> > > it as-is.
>> > >
>> > GIM>> Thank you for agreeing.
>> >
>> > >
>> > > Section 8
>> > >
>> > > We could perhaps make some pro forma note that the BFD Discriminator
>> > > attribute, like all BGP attributes, typically does not benefit from
>> > > cryptographic integrity protection and thus could be spoofed so as t=
o
>> be
>> > > different than what is actually used by the multipoint BFD head.  Th=
at
>> > > said, I'm willing to let this fall under the incorporated-by-referen=
ce
>> > > BGP security considerations.
>> > >
>> > GIM>> Thank you.
>> >
>> > >
>> > > Is it worth noting that operating in "hot" standby mode will increas=
e
>> > > the general level of traffic on the VPN and thus susceptibility to
>> DoS?
>> > >
>> > GIM>> We use hot standby in the control plane only. That would add som=
e
>> BGP
>> > traffic but would not as much as 1+1 protection in the data plane. I
>> think
>> > that the amount of the additional load in the VPN with the "hot standb=
y"
>> > defined in the draft unlikely to make PEs more volnurable to DoS. What
>> do
>> > you think?
>>
>> I think I was assuming this was "hot" in the data plane as well as the
>> control plane, when I Wrote the comment.  For just the control plane, yo=
ur
>> assessment seems reasonable.
>>
>> > >
>> > >    This document uses P2MP BFD, as defined in [RFC8562], which, in
>> turn,
>> > >    is based on [RFC5880].  Security considerations relevant to each
>> > >    protocol are discussed in the respective protocol specifications.
>> An
>> > >    implementation that supports this specification MUST use a
>> mechanism
>> > >    to control the maximum number of P2MP BFD sessions that can be
>> active
>> > >    at the same time.
>> > >
>> > > What is the objective that this control is designed to achieve?  I c=
an
>> > > "control the maximum number of sessions" by asserting the maximum
>> number
>> > > to be an absurdly large value, but I don't think that would meet the
>> > > spirit of this requirement (it does meet the letter of the
>> requirement).
>> > >
>> > GIM>> Though this recommendation may look as too vague, I think it is
>> > helpful to a developer. I imagine, as we've discussed in regard to the
>> > selection of the interval between BFD Control packets, an operator wil=
l
>> > consider the overall load of BFD Control packets across all active BFD
>> > sessions. Do you think that a sentence that connects the number of p2m=
p
>> BFD
>> > sessions and the rate of BFD Control packets be helpful in this contex=
t?
>>
>> Or even another clause, maybe something like "to limit the overall amoun=
t
>> of capacity used by the BFD traffic".  (I think part of what triggered m=
y
>> comment is that this is "MUST use", not "MUST provide" -- the goal of a
>> "MUST provide" is fairly obvious but "MUST use" with no specific bound
>> could be seen as make-work.)
>>
> GIM2>> More thanks for this suggestion. I think that your clause is more
> general and better expresses our concern in regard to the potential impac=
t
> of using p2mp BFD. Below is the new text I propose:
> NEW TEXT:
>    This document uses P2MP BFD, as defined in [RFC8562], which, in turn,
>    is based on [RFC5880].  Security considerations relevant to each
>    protocol are discussed in the respective protocol specifications.  An
>    implementation that supports this specification MUST provide a
>    mechanism to limit the overall amount of capacity used by the BFD
>    traffic (as the combination of the number of active P2MP BFD sessions
>    and the rate of BFD Control packets to process).
>
>>
>> > >
>> > >    The methods described in Section 3.1 may produce false-negative
>> state
>> > >    changes that can be the trigger for an unnecessary convergence in
>> the
>> > >    control plane, ultimately negatively impacting the multicast
>> service
>> > >    provided by the VPN.  An operator is expected to consider the
>> network
>> > >    environment and use available controls of the mechanism used to
>> > >    determine the status of a P-tunnel.
>> > >
>> > > We mentioned earlier (e.g., in =C2=A73.1) that similar negative effe=
cts can
>> > > occur when resiliency mechanisms at different layers interact; that
>> > > might be worth repeating here.
>> > >
>> > GIM>> One of such references is in Section 3.1.2:
>> >    In many cases, it is not practical to use both protection
>> >    methods at the same time because uncorrelated timers might cause
>> >    unnecessary switchovers and destabilize the network.
>> > Thus we referred to Section 3.1 as the encompassing reference to all
>> > possible scenarios. Would you agree with that?
>>
>> Wow, that looks like a real short-term memory failure on my part (=C2=A7=
3.1 was
>> mentioned just in the previous sentence!).  Sorry for the noise; this is
>> fine as-is.
>>
>> Thanks again,
>>
>> Ben
>>
>

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<div dir=3D"ltr">Hi Ben, et al.,<div>I&#39;ve uploaded version -14 of the d=
raft that includes all the updates we&#39;ve discussed. Please let me know =
if you find this version satisfactory addresses your DISCUSS and COMMENTS.<=
/div><div><br></div><div>Regards,</div><div>Greg</div><div><br></div><div>A=
 new version of I-D, draft-ietf-bess-mvpn-fast-failover-14.txt<br>has been =
successfully submitted by Greg Mirsky and posted to the<br>IETF repository.=
<br><br>Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-bess-mvpn-=
fast-failover<br>Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A014<br>Title:=C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 Multicast VPN Fast Upstream Failover<br>Document d=
ate:=C2=A0 2020-12-21<br>Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 bess<br>P=
ages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 24<br>URL:=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0=C2=A0<a href=3D"https://www.ietf.org/archive/id/draft-iet=
f-bess-mvpn-fast-failover-14.txt" rel=3D"noreferrer" target=3D"_blank">http=
s://www.ietf.org/archive/id/draft-ietf-bess-mvpn-fast-failover-14.txt</a><b=
r>Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.i=
etf.org/doc/draft-ietf-bess-mvpn-fast-failover/" rel=3D"noreferrer" target=
=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-fail=
over/</a><br>Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatra=
cker.ietf.org/doc/html/draft-ietf-bess-mvpn-fast-failover" rel=3D"noreferre=
r" target=3D"_blank">https://datatracker.ietf.org/doc/html/draft-ietf-bess-=
mvpn-fast-failover</a><br>Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"ht=
tps://tools.ietf.org/html/draft-ietf-bess-mvpn-fast-failover-14" rel=3D"nor=
eferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-bess-mvpn=
-fast-failover-14</a><br>Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a h=
ref=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bess-mvpn-fast-failov=
er-14" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?ur=
l2=3Ddraft-ietf-bess-mvpn-fast-failover-14</a><br><br>Abstract:<br>=C2=A0 =
=C2=A0This document defines Multicast Virtual Private Network (VPN)<br>=C2=
=A0 =C2=A0extensions and procedures that allow fast failover for upstream<b=
r>=C2=A0 =C2=A0failures by allowing downstream Provider Edges (PEs) to cons=
ider the<br>=C2=A0 =C2=A0status of Provider-Tunnels (P-tunnels) when select=
ing the upstream PE<br>=C2=A0 =C2=A0for a VPN multicast flow.=C2=A0 The fas=
t failover is enabled by using RFC<br>=C2=A0 =C2=A08562 Bidirectional Forwa=
rding Detection (BFD) for Multipoint Networks<br>=C2=A0 =C2=A0and the new B=
GP Attribute - BFD Discriminator.=C2=A0 Also, the document<br>=C2=A0 =C2=A0=
introduces a new BGP Community, Standby PE, extending BGP Multicast<br>=C2=
=A0 =C2=A0VPN routing so that a C-multicast route can be advertised toward =
a<br>=C2=A0 =C2=A0Standby Upstream PE.<br><br><br><br><br>Please note that =
it may take a couple of minutes from the time of submission<br>until the ht=
mlized version and diff are available at=C2=A0<a href=3D"http://tools.ietf.=
org/" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br><br>The I=
ETF Secretariat<div class=3D"gmail-yj6qo"></div><br class=3D"gmail-Apple-in=
terchange-newline"><div><br></div></div></div><br><div class=3D"gmail_quote=
"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Dec 18, 2020 at 6:34 PM Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com=
</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:=
0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">=
<div dir=3D"ltr">Hi Ben,<div>many thanks for your kind considerations of th=
e proposed updates. Please find my follow-up notes in-lined=C2=A0under the =
GIM2&gt;&gt; tag below.</div><div></div><div>Attached is the diff that high=
lights all the updates including the ones that address comments by Martin, =
Barry, Roman, and Murray.</div><div>I will upload the new version if you ag=
ree to the latest proposed updates.<br></div><div><br></div><div>Regards,</=
div><div>Greg</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D=
"gmail_attr">On Thu, Dec 17, 2020 at 6:02 PM Benjamin Kaduk &lt;<a href=3D"=
mailto:kaduk@mit.edu" target=3D"_blank">kaduk@mit.edu</a>&gt; wrote:<br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Greg,<br>
<br>
Also inline (though there&#39;s not much left to say)<br>
<br>
On Wed, Dec 16, 2020 at 12:17:55PM -0800, Greg Mirsky wrote:<br>
&gt; Hi Ben,<br>
&gt; thank you for the review, and your detailed comments and direct questi=
ons.<br>
&gt; Please find my answers and proposed updates in-lined below under the G=
IM&gt;&gt;<br>
&gt; tag.<br>
&gt; Attached, please find, the diff highlighting the updates and the new<b=
r>
&gt; working version of the draft.<br>
&gt; <br>
&gt; Regards,<br>
&gt; Greg<br>
&gt; <br>
&gt; On Mon, Dec 14, 2020 at 4:51 PM Benjamin Kaduk via Datatracker &lt;<br=
>
&gt; <a href=3D"mailto:noreply@ietf.org" target=3D"_blank">noreply@ietf.org=
</a>&gt; wrote:<br>
&gt; <br>
&gt; &gt; Benjamin Kaduk has entered the following ballot position for<br>
&gt; &gt; draft-ietf-bess-mvpn-fast-failover-13: Discuss<br>
&gt; &gt;<br>
&gt; &gt; When responding, please keep the subject line intact and reply to=
 all<br>
&gt; &gt; email addresses included in the To and CC lines. (Feel free to cu=
t this<br>
&gt; &gt; introductory paragraph, however.)<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; Please refer to <a href=3D"https://www.ietf.org/iesg/statement/di=
scuss-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.=
org/iesg/statement/discuss-criteria.html</a><br>
&gt; &gt; for more information about IESG DISCUSS and COMMENT positions.<br=
>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; The document, along with other ballot positions, can be found her=
e:<br>
&gt; &gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-=
fast-failover/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ie=
tf.org/doc/draft-ietf-bess-mvpn-fast-failover/</a><br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt; DISCUSS:<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt;<br>
&gt; &gt; Let&#39;s talk about what the requirements are for consistency ac=
ross PEs in<br>
&gt; &gt; the algorithm for selecting the Primary Upstream PE.=C2=A0 Sectio=
n 4 notes<br>
&gt; &gt; that &quot;all the PEs of that MVPN [are required] to follow the =
same UMH<br>
&gt; &gt; selection procedure&quot;, but leaves the option of non-revertive=
 behavior as<br>
&gt; &gt; something that &quot;MAY also be supported by an implementation&q=
uot;, without<br>
&gt; &gt; requirement for consistency across all PEs.=C2=A0 It seems to me =
that if some<br>
&gt; &gt; PEs use non-revertive behavior and others do not, then they will<=
br>
&gt; &gt; disagree as to which PE is the Primary (or active) PE in some cas=
es,<br>
&gt; &gt; which seems to conflict with the initial guidance that all PEs ne=
eded to<br>
&gt; &gt; pick the same one.=C2=A0 Is it perhaps that the PEs need to agree=
 on which PE<br>
&gt; &gt; is to be advertised as Primary but not necessarily to actually be=
 using<br>
&gt; &gt; that one for traffic?=C2=A0 Or am I missing something?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for pointing out this inconsistency. I agree tha=
t the text<br>
&gt; needs some tightening. Below is the proposed update:<br>
&gt; OLD TEXT:<br>
&gt;=C2=A0 =C2=A0 Such behavior is referred to as<br>
&gt;=C2=A0 =C2=A0 &quot;revertive&quot; behavior and MUST be supported.=C2=
=A0 Non-revertive behavior<br>
&gt;=C2=A0 =C2=A0 refers to the behavior of continuing to select the backup=
 PE as the<br>
&gt;=C2=A0 =C2=A0 UMH even after the Primary has come up.=C2=A0 This non-re=
vertive behavior<br>
&gt;=C2=A0 =C2=A0 MAY also be supported by an implementation and would be e=
nabled<br>
&gt;=C2=A0 =C2=A0 through some configuration.<br>
&gt; NEW TEXT:<br>
&gt; Such behavior is referred to as<br>
&gt;=C2=A0 =C2=A0 &quot;revertive&quot; behavior and MUST be supported.=C2=
=A0 Non-revertive behavior<br>
&gt;=C2=A0 =C2=A0 refers to the behavior of continuing to select the backup=
 PE as the<br>
&gt;=C2=A0 =C2=A0 UMH even after the Primary has come up.=C2=A0 This non-re=
vertive behavior<br>
&gt;=C2=A0 =C2=A0 MAY also be supported by an implementation and would be e=
nabled<br>
&gt;=C2=A0 =C2=A0 through some configuration.=C2=A0 Selection of the behavi=
or, revertive or<br>
&gt;=C2=A0 =C2=A0 non-revertive, is an operational issue, but it MUST be co=
nsistent on<br>
&gt;=C2=A0 =C2=A0 all PEs in the given MVPN.<br>
<br>
Looks good; I&#39;m glad this was just a simple change.<br>
<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt; COMMENT:<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt;<br>
&gt; &gt; Section 1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 3 describes local procedures allowing an egr=
ess PE (a PE<br>
&gt; &gt;=C2=A0 =C2=A0 connected to a receiver site) to take into account t=
he status of<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnels to determine the Upstream Multicast Hop (U=
MH) for a given<br>
&gt; &gt;=C2=A0 =C2=A0 (C-S, C-G).=C2=A0 [...]<br>
&gt; &gt;<br>
&gt; &gt; Does it also apply to (C-*, C-G)?=C2=A0 (I&#39;ll just mention it=
 once, but the<br>
&gt; &gt; handling seems to be somewhat inconsistent throughout the documen=
t, with<br>
&gt; &gt; (C-*,C-G) getting mentioned sometimes but not always, and no patt=
ern<br>
&gt; &gt; obvious to me for when it is or is not included.=C2=A0 I think I =
see some<br>
&gt; &gt; instances where (C-*, C-G) does not make sense, so it would proba=
bly not<br>
&gt; &gt; be a universal replacement.)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Yes, it cannot be used interchangeably. We&#39;ve followed=
 the notation<br>
&gt; as defined in the last paragraph of Section 3.1 RFC 6513:<br>
&gt;=C2=A0 =C2=A0 ... C-group address would be a group address in a<br>
&gt;=C2=A0 =C2=A0 VPN&#39;s address space.=C2=A0 A C-tree is a multicast di=
stribution tree<br>
&gt;=C2=A0 =C2=A0 constructed and maintained by the PIM C-instances.=C2=A0 =
A C-flow is a<br>
&gt;=C2=A0 =C2=A0 stream of multicast packets with a common C-source addres=
s and a<br>
&gt;=C2=A0 =C2=A0 common C-group address.=C2=A0 We will use the notation &q=
uot;(C-S,C-G)&quot; to<br>
&gt;=C2=A0 =C2=A0 identify specific C-flows.=C2=A0 If a particular C-tree i=
s a shared tree<br>
&gt;=C2=A0 =C2=A0 (whether unidirectional or bidirectional) rather than a s=
ource-<br>
&gt;=C2=A0 =C2=A0 specific tree, we will sometimes speak of the entire set =
of flows<br>
&gt;=C2=A0 =C2=A0 traveling that tree, identifying the set as &quot;(C-*,C-=
G)&quot;.<br>
&gt; It is my understanding, that the one reference to (C-*,C-G) in the dra=
ft is<br>
&gt; in Section 3 bullet B:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0The S-PMSI can be advertised o=
nly after the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Upstream PE receives a C-multi=
cast route for (C-S, C-G)/(C-*,<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0C-G) to be carried over the ad=
vertised S-PMSI.<br>
&gt; The reference is not an introduced text but an informational summary o=
f<br>
&gt; Section 5.1 RFC 6513. The text preceding that reference is intended to=
<br>
&gt; clarify its status:<br>
&gt;=C2=A0 =C2=A0There are three options specified in Section 5.1 of [RFC65=
13] for a<br>
&gt;=C2=A0 =C2=A0 downstream PE to select an Upstream PE.<br>
&gt; Would you suggest an additional text?<br>
<br>
I don&#39;t see a need for additional text.=C2=A0 Thanks for walking me thr=
ough it<br>
-- I&#39;m pretty sure I had lost track of the fact that the =C2=A73 (and o=
nly)<br>
occurrence of &quot;(C-*, C-G)&quot; was in a part that was supposed to be<=
br>
summarizing RFC 6513 by the time I stumbled upon it.=C2=A0 With the extra<b=
r>
context it all seems clear.<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 5 describes a &quot;hot leaf standby&quot; m=
echanism that can be used<br>
&gt; &gt;=C2=A0 =C2=A0 to improve failover time in MVPN.=C2=A0 The approach=
 combines mechanisms<br>
&gt; &gt;=C2=A0 =C2=A0 defined in Section 3 and Section 4 has similarities =
with the solution<br>
&gt; &gt;=C2=A0 =C2=A0 described in [RFC7431] to improve failover times whe=
n PIM routing is<br>
&gt; &gt;=C2=A0 =C2=A0 used in a network given some topology and metric con=
straints.<br>
&gt; &gt;<br>
&gt; &gt; nit: grammar issue around &quot;has similarities with&quot; (mayb=
e needs a leading<br>
&gt; &gt; &quot;and&quot;?)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you. Updated to:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 Section 5 describes a &quot;hot leaf standby&quot; mechan=
ism that can be used<br>
&gt;=C2=A0 =C2=A0 to improve failover time in MVPN.=C2=A0 The approach comb=
ines mechanisms<br>
&gt;=C2=A0 =C2=A0 defined in Section 3 and Section 4, and has similarities =
with the<br>
&gt;=C2=A0 =C2=A0 solution described in [RFC7431] to improve failover times=
 when PIM<br>
&gt;=C2=A0 =C2=A0 routing is used in a network given some topology and metr=
ic<br>
&gt;=C2=A0 =C2=A0 constraints.<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 VPNs.=C2=A0 An operator would enable these mechanism=
s using a method<br>
&gt; &gt;=C2=A0 =C2=A0 discussed in Section 3 in combination with the redun=
dancy provided by<br>
&gt; &gt;=C2=A0 =C2=A0 a standby PE connected to the source of the multicas=
t flow, and it is<br>
&gt; &gt;=C2=A0 =C2=A0 assumed that all PEs in the network would support th=
ese mechanisms<br>
&gt; &gt;=C2=A0 =C2=A0 for the procedures to work.=C2=A0 In the case that a=
 BGP implementation<br>
&gt; &gt;<br>
&gt; &gt; Is it a matter of &quot;the procedure will not work at all unless=
 all PEs in<br>
&gt; &gt; the network support it&quot;, or &quot;only the PEs that support =
it will get the<br>
&gt; &gt; benefits of it&quot;?=C2=A0 [The next sentence suggests an anwer.=
..]<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; The sentence might be too long. Yes, only PEs that support=
 the new<br>
&gt; Standby PE community and use any of UMH monitoring methods would conve=
rge<br>
&gt; faster than PEs that don&#39;t support both features. Would the re-wor=
ding as<br>
&gt; below make the text clear:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 An operator would enable these mechanisms using a method<=
br>
&gt;=C2=A0 =C2=A0 discussed in Section 3 combined with the redundancy provi=
ded by a<br>
&gt;=C2=A0 =C2=A0 standby PE connected to the multicast flow source.=C2=A0 =
PEs that support<br>
&gt;=C2=A0 =C2=A0 these mechanisms would converge faster and thus provide a=
 more stable<br>
&gt;=C2=A0 =C2=A0 multicast service.<br>
<br>
Yes, that looks pretty crisp -- thanks!<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 3<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 9.1.1 of [RFC6513] are applicable when using=
 I-PMSI<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnels.=C2=A0 That document is a foundation for t=
his document, and its<br>
&gt; &gt;=C2=A0 =C2=A0 processes all apply here.=C2=A0 Section 9.1.1 mandat=
es the use of specific<br>
&gt; &gt;=C2=A0 =C2=A0 procedures for sending intra-AS I-PMSI A-D Routes.<b=
r>
&gt; &gt;<br>
&gt; &gt; (nit) the second &quot;Section 9.1.1&quot; is also referring to R=
FC 6513, not this<br>
&gt; &gt; document, which would be the default interpretation of a bare sec=
tion<br>
&gt; &gt; reference.<br>
&gt; <br>
&gt; <br>
&gt; &gt; (not-nit) The referenced procedure seems to be about processing, =
not<br>
&gt; &gt; sending, intra-AS I-PMSI A-D routes.=C2=A0 Am I misreading someth=
ing?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; You are right. The sentence mischaracterizes Section 9.1.1=
 and has no<br>
&gt; informational value. Removed it altogether.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Different factors can be considered to determine the=
 &quot;status&quot; of a<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnel and are described in the following sub-sect=
ions.=C2=A0 The<br>
&gt; &gt;=C2=A0 =C2=A0 optional procedures described in this section also h=
andle the case<br>
&gt; &gt;=C2=A0 =C2=A0 the downstream PEs do not all apply the same rules t=
o define what the<br>
&gt; &gt;=C2=A0 =C2=A0 status of a P-tunnel is (please see Section 6), and =
some of them will<br>
&gt; &gt;=C2=A0 =C2=A0 produce a result that may be different for different=
 downstream PEs.<br>
&gt; &gt;<br>
&gt; &gt; nit: I think it&#39;s better to put a word like &quot;where&quot;=
 in &quot;the case the<br>
&gt; &gt; downtream PEs&quot;.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I&#39;ve tried it like the following:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The<br>
&gt;=C2=A0 =C2=A0 optional procedures described in this section also handle=
 the case<br>
&gt;=C2=A0 =C2=A0 when the downstream PEs do not all apply the same rules t=
o define<br>
&gt;=C2=A0 =C2=A0 what the status of a P-tunnel is (please see Section 6), =
and some of<br>
&gt;=C2=A0 =C2=A0 them will produce a result that may be different for diff=
erent<br>
&gt;=C2=A0 =C2=A0 downstream PEs.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.3<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 corresponding P-tunnel MUST be re-evaluated.=C2=A0 I=
f the P-tunnel<br>
&gt; &gt;=C2=A0 =C2=A0 transitions from Up to Down state, the Upstream PE t=
hat is the<br>
&gt; &gt;=C2=A0 =C2=A0 ingress of the P-tunnel MUST NOT be considered a val=
id UMH.<br>
&gt; &gt;<br>
&gt; &gt; (nit?) I&#39;m not sure how much precedent there is for using &qu=
ot;valid&quot; in<br>
&gt; &gt; this context -- IIUC the previous discussion of this process refe=
rred<br>
&gt; &gt; only to whether a PE is a candidate for being the UMH.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I agree, &quot;candidate&quot; is missing here. Proposed u=
pdate:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 If the P-tunnel<br>
&gt;=C2=A0 =C2=A0 transitions from Up to Down state, the Upstream PE that i=
s the<br>
&gt;=C2=A0 =C2=A0 ingress of the P-tunnel MUST NOT be considered as a valid=
 candidate<br>
&gt;=C2=A0 =C2=A0 UMH.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.5<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 When such a procedure is used, in the context where =
fast restoration<br>
&gt; &gt;=C2=A0 =C2=A0 mechanisms are used for the P-tunnels, a configurabl=
e timer MUST be<br>
&gt; &gt;=C2=A0 =C2=A0 set on the downstream PE to wait before updating the=
 UMH, to let the<br>
&gt; &gt;=C2=A0 =C2=A0 P-tunnel restoration mechanism to execute its action=
s.=C2=A0 An<br>
&gt; &gt;=C2=A0 =C2=A0 implementation SHOULD use three seconds as the defau=
lt value for this<br>
&gt; &gt;=C2=A0 =C2=A0 timer.<br>
&gt; &gt;<br>
&gt; &gt; How does this interact with the value of the maximum inter-packet=
 time?<br>
&gt; &gt; Suppose that I know to expect at least one packet every ten secon=
ds.=C2=A0 Do<br>
&gt; &gt; I wait ten seconds after receiving the last packet and then anoth=
er<br>
&gt; &gt; three seconds, before engaging in an UMH change?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; This scenario is similar to the use of an active OAM detec=
ting a<br>
&gt; network failure. The role of the timer to trigger an action if a certa=
in<br>
&gt; number of packets have not arrived. Since the maximum inter-packet tim=
e is<br>
&gt; known, a downstream PE has an expectation of receiving a packet within=
 a<br>
&gt; time interval large than the maximum inter-packet interval. In practic=
e,<br>
&gt; the timer could be set three times the maximum inter-packet interval, =
so<br>
&gt; that it expires if three consecutive packets were not received. In the=
 case<br>
&gt; you&#39;ve described, I think that the timer must be set larger than 1=
0<br>
&gt; seconds, probably 30+ seconds. Would you suggest any additional text h=
ere?<br>
<br>
I think my uncertainty here is whether the 3 seconds default is intended to=
<br>
be the only waiting period or an additional waiting period after<br>
determining that the tunnel is &quot;probably down&quot; but before updatin=
g the UMH.<br>
(Looking at it again now, the latter is a bit of a strained<br>
interpretation.)=C2=A0 That said, your description here suggests that the<b=
r>
operative mechanism is to determine that the tunnel is probably down by<br>
passing a threshold number of packets that were expected but did not<br>
arrive, with some accomodation for jitter in the network if packets are<br>
supposed to be arriving very quickly so that &quot;just wait for 3 missed<b=
r>
packets&quot; isn&#39;t long enough to account for (e.g.) interrupt handlin=
g on a<br>
forwarder.=C2=A0 So the intended sentiment seems to be something like<br>
&quot;Determining that a tunnel is probably down by waiting for enough pack=
ets<br>
to fail to arrive as expected is a heuristic and operational matter that<br=
>
depends on the maximum inter-packet time.=C2=A0 A timeout of three seconds =
is a<br>
generally suitable default waiting period to ascertain that the tunnel is<b=
r>
down, though other values would be needed for atypical conditions.&quot;=C2=
=A0</blockquote><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
I would not complain if you kept the original text, though.<br></blockquote=
><div>GIM2&gt;&gt; I much appreciate the consideration you gave to the docu=
ment and glad to use the suggested text.=C2=A0</div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 In cases where this mechanism is used in conjunction=
 with the method<br>
&gt; &gt;=C2=A0 =C2=A0 described in Section 5, no prior knowledge of the ra=
te of the<br>
&gt; &gt;=C2=A0 =C2=A0 multicast streams is required; downstream PEs can co=
mpare reception<br>
&gt; &gt;=C2=A0 =C2=A0 on the two P-tunnels to determine when one of them i=
s down.<br>
&gt; &gt;<br>
&gt; &gt; This feels a little underspecified; is there a reference or more<=
br>
&gt; &gt; guidance that we could give about turning a stream of received pa=
ckets<br>
&gt; &gt; on one tunnel into a maximum inter-packet time on another tunnel,=
<br>
&gt; &gt; supposedly carrying the same traffic?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I think that this text refers to 1+1 protection, i.e., Act=
ive-Active<br>
&gt; P-tunnels. In that scenario, the determination of the P-tunnel&#39;s s=
tate can<br>
&gt; be done by comparing it to the reception state of the other P-tunnel i=
n the<br>
&gt; redundancy group. But there might be corner cases, like a significant =
delay<br>
&gt; in one of P-tunnels, that may need consideration before recommending t=
his<br>
&gt; method. I don&#39;t think that it is in the scope of the document. Wou=
ld<br>
&gt; appending the paragraph with &quot;The detailed specification of this =
mechanism<br>
&gt; is outside the scope of this document&quot; be acceptable?<br>
<br>
I think my confusion stems from the first paragraph of the section seeming<=
br>
to emphasize the dependence on the &quot;maximum inter-packet time&quot;, b=
ut the<br>
best algorithm to use in the 1+1 case seems likely to be different (i.e.,<b=
r>
one that makes use of the full knowledge of the incoming packet<br>
distribution).=C2=A0 So my suggestion would be something more along the lin=
es of<br>
&quot;no prior knowledge of the rate or maximum inter-packet time on the<br=
>
multicast streams is required; downstream PEs can compare actual packet<br>
reception statistics on the two P-tunnels to determine when one of them is<=
br>
down&quot;.=C2=A0 (Adding a &quot;details are out of scope of the document&=
quot; to that would<br>
be fine, of course.)<br></blockquote><div>GIM2&gt;&gt; Thanks again for the=
 suggested text.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x">
<br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.6<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 one octet-long field of TLV&#39=
;s Type value (Section 7.3)<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 one octet-long field of the len=
gth of the Value field in octets<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 variable length Value field.<br=
>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0The length of a TLV MUST be multiple of=
 four octets.<br>
&gt; &gt;<br>
&gt; &gt; I assume this is the total length, not the value in the length fi=
eld?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Correct. Would the following update make it clearer?<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Figure 2 presents the Optional TLV format TL=
V that<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0consists of:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 Type - a one-octet-long field that c=
haracterizes the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 interpretation of the Value field (S=
ection 7.3)<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 Length - a one-octet-long field equa=
l to the length of the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Value field in octets<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0*=C2=A0 Value - a variable-length field.<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0The length of a TLV as a whole MUST be multi=
ple of four octets.<br>
<br>
Yes, that&#39;s more clear.=C2=A0 (But given Jeff and Alvaro&#39;s comments=
 maybe the<br>
whole thing will change anyway.)<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 The BFD Discriminator attribute MUST be considered m=
alformed if its<br>
&gt; &gt;=C2=A0 =C2=A0 length is not a non-zero multiple of four.=C2=A0 If =
the attribute<br>
&gt; &gt;=C2=A0 =C2=A0 considered malformed, the UPDATE message SHALL be ha=
ndled using the<br>
&gt; &gt;=C2=A0 =C2=A0 approach of Attribute Discard per [RFC7606].<br>
&gt; &gt;<br>
&gt; &gt; nit: s/attribute considered/attribute is considered/<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you! Updated text to:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The BFD Discriminator attribute MUST be considered malfor=
med if its<br>
&gt;=C2=A0 =C2=A0 length is not a non-zero multiple of four.=C2=A0 If the a=
ttribute is<br>
&gt;=C2=A0 =C2=A0 deemed to be malformed, the UPDATE message SHALL be handl=
ed using the<br>
&gt;=C2=A0 =C2=A0 approach of Attribute Discard per [RFC7606].<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.6.1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 MUST periodically transmit BFD Control packe=
ts over the x-PMSI<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0P-tunnel after the P-tunnel is consider=
ed established.=C2=A0 Note that<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the methods to declare a P-tunnel has b=
een established are outside<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the scope of this specification.<br>
&gt; &gt;<br>
&gt; &gt; Is there a good reference for how to choose the period of transmi=
ssion?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Not really. There are many factors that an operator should=
 consider<br>
&gt; when configuring the frequency of BFD packets on the MultipointHead sy=
stem.<br>
&gt; One of the aspects to keep in mind is that unlike p2p BFD, there&#39;s=
 no<br>
&gt; interval negotiation phase in p2mp BFD. As a result, a tail has no<br>
&gt; influence over the interval at which the head of the p2mp BFD session<=
br>
&gt; transmits BFD Control messages.<br>
<br>
Okay.=C2=A0 (Yes, I do remember there was a fair bit of contention in the<b=
r>
reviews of the multipoint BFD document relating to the transmission<br>
frequency and the potential to overload the network in the absence of<br>
feedback ... luckily that was a case where I was able to sit back and<br>
watch, and not have to be taking a position.)<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 If the tracking of the P-tunnel by using a P2MP BFD =
session is<br>
&gt; &gt;=C2=A0 =C2=A0 enabled after the x-PMSI A-D Route has been already =
advertised, the<br>
&gt; &gt;=C2=A0 =C2=A0 x-PMSI A-D Route MUST be re-sent with precisely the =
same attributes<br>
&gt; &gt;=C2=A0 =C2=A0 as before and the BFD Discriminator attribute includ=
ed.<br>
&gt; &gt;<br>
&gt; &gt; Pedantically, it seems like &quot;precisely the same attributes a=
s before&quot;<br>
&gt; &gt; is incompatible with adding the BFD Discriminator attribute.=C2=
=A0 Phrasing<br>
&gt; &gt; that discusses &quot;the only change between the previous adverti=
sement and<br>
&gt; &gt; the new advertisement&quot; would not suffer from such a potentia=
l issue.<br>
&gt; &gt; (And similarly for when the BFD Discriminator attribute is to be<=
br>
&gt; &gt; removed, a couple paragraphs later.)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Great, thank you. Applied in both cases:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 If the tracking of the P-tunnel by using a P2MP BFD sessi=
on is<br>
&gt;=C2=A0 =C2=A0 enabled after the x-PMSI A-D Route has been already adver=
tised, the<br>
&gt;=C2=A0 =C2=A0 x-PMSI A-D Route MUST be re-sent with the only change bet=
ween the<br>
&gt;=C2=A0 =C2=A0 previous advertisement and the new advertisement to be th=
e inclusion<br>
&gt;=C2=A0 =C2=A0 of the BFD Discriminator attribute.<br>
&gt; and<br>
&gt;=C2=A0 =C2=A0 o=C2=A0 x-PMSI A-D Route MUST be re-sent with the only ch=
ange between the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0previous advertisement and the new advertise=
ment be the exclusion<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0of the BFD Discriminator attribute;<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 3.1.6.2<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 MUST use the source IP address of the BFD Co=
ntrol packet, the<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0value of the BFD Discriminator field, a=
nd the x-PMSI Tunnel<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Identifier [RFC6514] the BFD Control pa=
cket was received to<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0properly demultiplex BFD sessions.<br>
&gt; &gt;<br>
&gt; &gt; nit: missing word around &quot;the BFD Control packet was receive=
d&quot; (maybe<br>
&gt; &gt; &quot;received on/in&quot;?).<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; &quot;on&quot; seems the better option. Updated accordingl=
y.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 According to [RFC8562], if the downstream PE receive=
s Down or<br>
&gt; &gt;=C2=A0 =C2=A0 AdminDown in the State field of the BFD Control pack=
et or associated<br>
&gt; &gt;=C2=A0 =C2=A0 with the BFD session Detection Timer expires, the BF=
D session is<br>
&gt; &gt;<br>
&gt; &gt; nit: &quot;the BFD Detection Timer associated with the BFD sessio=
n expires&quot;<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for the helpful suggestion. Updated.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 PE, while others are considered as Standby Upstream =
PEs.=C2=A0 In such a<br>
&gt; &gt;=C2=A0 =C2=A0 scenario, when the P-tunnel is considered down, the =
downstream PE MAY<br>
&gt; &gt;=C2=A0 =C2=A0 initiate a switchover of the traffic from the Primar=
y Upstream PE to<br>
&gt; &gt;=C2=A0 =C2=A0 the Standby Upstream PE only if the Standby Upstream=
 PE is deemed<br>
&gt; &gt;=C2=A0 =C2=A0 available.<br>
&gt; &gt;<br>
&gt; &gt; I&#39;m not sure that we&#39;ve defined what it means for an Upst=
ream PE to be<br>
&gt; &gt; deemed &quot;available&#39;, yet.=C2=A0 I guess it&#39;s possible=
 that there is not an<br>
&gt; &gt; established P-Tunnel between the (selected) Standby Upstream PE a=
nd the<br>
&gt; &gt; donstream PE, so just using the Up/Down/not-known-to-be-Down stat=
us of<br>
&gt; &gt; that P-tunnel is not an option...<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; The wording is sloppy, agree. I think that the intention w=
as to say<br>
&gt; &quot;deemed in the Up state&quot;. That can be determined using the p=
2mp BFD session<br>
&gt; with Standby Upstream PE acting as its MultipointHead. The proposed up=
date<br>
&gt; is as follows:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 In such a scenario, when the P-tunnel is considered<br>
&gt;=C2=A0 =C2=A0 down, the downstream PE MAY initiate a switchover of the =
traffic from<br>
&gt;=C2=A0 =C2=A0 the Primary Upstream PE to the Standby Upstream PE only i=
f the<br>
&gt;=C2=A0 =C2=A0 Standby Upstream PE is deemed to be in the Up state.=C2=
=A0 That MAY be<br>
&gt;=C2=A0 =C2=A0 determined from the state of a P2MP BFD session with the =
Standby<br>
&gt;=C2=A0 =C2=A0 Upstream PE as the MultipointHead.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 If the downstream PE&#39;s P-tunnel is already estab=
lished when the<br>
&gt; &gt;=C2=A0 =C2=A0 downstream PE receives the new x-PMSI A-D Route with=
 BFD<br>
&gt; &gt;=C2=A0 =C2=A0 Discriminator attribute, the downstream PE MUST asso=
ciate the value<br>
&gt; &gt;=C2=A0 =C2=A0 of BFD Discriminator field with the P-tunnel and fol=
low procedures<br>
&gt; &gt;=C2=A0 =C2=A0 listed above in this section if and only if the x-PM=
SI A-D Route was<br>
&gt; &gt;=C2=A0 =C2=A0 properly processed as per [RFC6514], and the BFD Dis=
criminator<br>
&gt; &gt;=C2=A0 =C2=A0 attribute was validated.<br>
&gt; &gt;<br>
&gt; &gt; We did not discuss any validation of the BFD Discriminator attrib=
ute in<br>
&gt; &gt; =C2=A73.1.6; what procedures would this process entail?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; There&#39;s, so far, only one validation condition:<br>
&gt; <br>
&gt; The length of a TLV as a whole MUST be multiple of four octets.<br>
&gt; <br>
&gt; <br>
&gt; &gt; Section 4<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 The procedures described below are limited to the ca=
se where the site<br>
&gt; &gt;=C2=A0 =C2=A0 that contains C-S is connected to two or more PEs, t=
hough, to<br>
&gt; &gt;=C2=A0 =C2=A0 simplify the description, the case of dual-homing is=
 described.=C2=A0 The<br>
&gt; &gt;<br>
&gt; &gt; I suggest giving at least some considerations to how to choose be=
tween<br>
&gt; &gt; multiple standby Upstream PEs when there are more than one availa=
ble.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I understand your idea but that might be a whole new speci=
fication<br>
&gt; similar to the selection of UMH from the list of candidates. Perhaps<b=
r>
&gt; stating that the selection might use known methods but the specifics a=
re<br>
&gt; outside the scope of this document be acceptable? For example (sorry f=
or a<br>
&gt; longer quote):<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The procedures described below are limited to the case wh=
ere the site<br>
&gt;=C2=A0 =C2=A0 that contains C-S is connected to two or more PEs, though=
, to<br>
&gt;=C2=A0 =C2=A0 simplify the description, the case of dual-homing is desc=
ribed.=C2=A0 In<br>
&gt;=C2=A0 =C2=A0 the case where more than two PEs are connected to the C-s=
 site,<br>
&gt;=C2=A0 =C2=A0 selection of the Standby PE can be performed using one of=
 the methods<br>
&gt;=C2=A0 =C2=A0 of selecting a UMH.=C2=A0 Details of the selection are ou=
tside the scope<br>
&gt;=C2=A0 =C2=A0 of this document.=C2=A0 The procedures require all the PE=
s of that MVPN to<br>
&gt;=C2=A0 =C2=A0 follow the same UMH selection procedure, as specified in =
[RFC6513],<br>
&gt;=C2=A0 =C2=A0 whether the PE selected based on its IP address, hashing =
algorithm<br>
&gt;=C2=A0 =C2=A0 described in section 5.1.3 of [RFC6513], or Installed UMH=
 Route.=C2=A0 The<br>
&gt;=C2=A0 =C2=A0 procedures assume that if a site of a given MVPN that con=
tains C-S is<br>
&gt;=C2=A0 =C2=A0 dual-homed to two PEs, then all the other sites of that M=
VPN would<br>
&gt;=C2=A0 =C2=A0 have two unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S=
, each with<br>
&gt;=C2=A0 =C2=A0 its RD.<br>
<br>
I can understand that selecting from a list of (more than two) candidates<b=
r>
might end up being complicated; I think your text here is sufficient to<br>
address my concern, by giving some indication of how the extension to the<b=
r>
general case could be performed while acknowledging that it is not fully<br=
>
specified yet.<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 procedures require all the PEs of that MVPN to follo=
w the same UMH<br>
&gt; &gt;=C2=A0 =C2=A0 selection procedure, as specified in [RFC6513], whet=
her the PE<br>
&gt; &gt;=C2=A0 =C2=A0 selected based on its IP address, hashing algorithm =
described in<br>
&gt; &gt;=C2=A0 =C2=A0 section 5.1.3 of [RFC6513], or Installed UMH Route.=
=C2=A0 The procedures<br>
&gt; &gt;<br>
&gt; &gt; I assume that how the PEs agree on which procedure is in use does=
 not<br>
&gt; &gt; involve something being advertised in-band, and is out of scope f=
or this<br>
&gt; &gt; document.=C2=A0 But please say so!<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; You are right, that is an operational issue and the manage=
ment<br>
&gt; plane&#39;s responsibility.<br>
&gt; NEW TEXT:<br>
&gt; The procedures require all the PEs of that MVPN to<br>
&gt;=C2=A0 =C2=A0 follow the same UMH selection procedure, as specified in =
[RFC6513],<br>
&gt;=C2=A0 =C2=A0 whether the PE selected based on its IP address, the hash=
ing<br>
&gt;=C2=A0 =C2=A0 algorithm described in section 5.1.3 of [RFC6513], or Ins=
talled UMH<br>
&gt;=C2=A0 =C2=A0 Route.=C2=A0 The consistency of the UMH selection method =
used among all<br>
&gt;=C2=A0 =C2=A0 PEs is expected to be provided by the management plane.<b=
r>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 assume that if a site of a given MVPN that contains =
C-S is dual-homed<br>
&gt; &gt;=C2=A0 =C2=A0 to two PEs, then all the other sites of that MVPN wo=
uld have two<br>
&gt; &gt;=C2=A0 =C2=A0 unicast VPN routes (VPN-IPv4 or VPN-IPv6) to C-S, ea=
ch with its RD.<br>
&gt; &gt;<br>
&gt; &gt; nit: s/its RD/its own RD/<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Ack<br>
&gt; <br>
&gt; &gt; Also, please confirm that the unicast routes are *to* C-S, vs *fr=
om* it.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Though it might be somewhat counterintuitive, in the conte=
xt of MVPN<br>
&gt; &quot;to&quot; is correct.<br>
<br>
Thanks.<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 4.1<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 the NLRI is constructed as the C-multicast r=
oute with an RT that<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0identifies the Primary Upstream PE, exc=
ept that the RD is the same<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0as if the C-multicast route was built u=
sing the Standby Upstream<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0PE as the UMH (it will carry the RD ass=
ociated to the unicast VPN<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0route advertised by the Standby Upstrea=
m PE for S and a Route<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Target derived from the Standby Upstrea=
m PE&#39;s UMH route&#39;s VRF RT<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Import EC);<br>
&gt; &gt;<br>
&gt; &gt; This part is a bit confusing to me, since the first part says tha=
t the<br>
&gt; &gt; RT identifies the Primary Upstream PE, but the second part says t=
hat the<br>
&gt; &gt; RT is derived from the Standy Upstream PE&#39;s [stuff].=C2=A0 Bu=
t I&#39;m happy to<br>
&gt; &gt; trust you that the [stuff] makes it correct!<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for putting your trust in our collective thinkin=
g. AFAIK,<br>
&gt; it works.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 4.2<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0when the PE determines (the use of the =
particular method to detect<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0the failure is outside the scope of thi=
s document) that C-S is not<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0reachable through some other PE, the PE=
 SHOULD install VRF PIM<br>
&gt; &gt;<br>
&gt; &gt; It seems like a forward reference to =C2=A74.3 might be helpful.<=
br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for your suggestion, the reference is added in t=
he working<br>
&gt; version.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Section 9.3.2 of [RFC6514], describes the procedures=
 of sending a<br>
&gt; &gt;=C2=A0 =C2=A0 Source-Active A-D Route as a result of receiving the=
 C-multicast<br>
&gt; &gt;=C2=A0 =C2=A0 route.=C2=A0 These procedures MUST be followed for b=
oth the normal and<br>
&gt; &gt;=C2=A0 =C2=A0 Standby C-multicast routes.<br>
&gt; &gt;<br>
&gt; &gt; There is no section 9.3.2 in RFC 6514.=C2=A0 There is a 9.2.3 tha=
t looks<br>
&gt; &gt; perhaps plausible, though the string &quot;Source-Active&quot; do=
es not appear in<br>
&gt; &gt; it.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Great catch, thank you! I believe that the correct section=
 is in RFC<br>
&gt; 6513, not RFC 6514. The former opens with:<br>
&gt;=C2=A0 =C2=A0 The issue described in Section 9.3.1 is resolved through =
the use of<br>
&gt;=C2=A0 =C2=A0 Source Active A-D routes.=C2=A0 In the remainder this sec=
tion, we provide<br>
&gt;=C2=A0 =C2=A0 an example of how this works, along with an informal desc=
ription of<br>
&gt;=C2=A0 =C2=A0 the procedures.<br>
&gt; Would you agree RFC 6513 makes sense?<br>
<br>
That does look to make a lot more sense than 6514 did!<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 4.4.2<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 Source AS carried in the C-multicast route.=C2=A0 If=
 the match is found,<br>
&gt; &gt;=C2=A0 =C2=A0 and the C-multicast route carries the Standby PE BGP=
 Community, then<br>
&gt; &gt;=C2=A0 =C2=A0 the ASBR MUST perform as follows:<br>
&gt; &gt;<br>
&gt; &gt; (I assume that there is room for local policy to modify this &quo=
t;MUST&quot;,<br>
&gt; &gt; e.g., if needed to protect against some form of attack ... perhap=
s it<br>
&gt; &gt; even goes without saying.)<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Indeed. Perhaps the following change makes it more accurat=
e:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 If the match is found,<br>
&gt;=C2=A0 =C2=A0 and the C-multicast route carries the Standby PE BGP Comm=
unity, then<br>
&gt;=C2=A0 =C2=A0 the ASBR implementation that supports this specification =
MUST be<br>
&gt;=C2=A0 =C2=A0 configurable to perform as follows:<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 o=C2=A0 if the route was received over iBGP and its LOCAL=
_PREF attribute<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0is set to zero, then it MUST be re-advertise=
d in eBGP with a MED<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0attribute (MULTI_EXIT_DISC) set to the highe=
st possible value<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0(0xffff)<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 o=C2=A0 if the route was received over eBGP and its MED a=
ttribute set to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A00xffff, then it MUST be re-advertised in iBG=
P with a LOCAL_PREF<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0attribute set to zero<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 Other ASBR procedures are applied without modification an=
d, when<br>
&gt;=C2=A0 =C2=A0 applied, MAY modify the above-listed behavior.<br>
<br>
Works for me :)<br>
<br>
&gt; &gt;<br>
&gt; &gt; Section 5<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 o=C2=A0 Upstream PEs use the &quot;hot standby&quot;=
 optional behavior and thus will<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0forward traffic for a given multicast s=
tate as soon as they have<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0whether a (primary) BGP C-multicast rou=
te or a Standby BGP<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0C-multicast route for that state (or bo=
th)<br>
&gt; &gt;<br>
&gt; &gt; nit: the grammar is a bit weird here, after &quot;as soon as they=
 have&quot;; I&#39;m<br>
&gt; &gt; not confident that I could make an accurate suggestion for a fix.=
<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Would with a minor update it all reads better:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Upstream PEs use the &quot;hot standby&quot;=
 optional behavior and thus will<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0start forwarding traffic for a given multica=
st state after they<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0have whether a (primary) BGP C-multicast rou=
te or a Standby BGP<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0C-multicast route for that state (or both)<b=
r>
<br>
I think that &quot;whether&quot; is not needed (though &quot;either&quot; m=
ight work in its<br>
stead).<br></blockquote><div>GIM2&gt;&gt; Yes, it was not the best choice. =
Below is the newest version:</div><div>=C2=A0 =C2=A0 o =C2=A0Upstream PEs u=
se the &quot;hot standby&quot; optional behavior and thus will</div>=C2=A0 =
=C2=A0 =C2=A0 start forwarding traffic for a given multicast state after th=
ey<br>=C2=A0 =C2=A0 =C2=A0 have a (primary) BGP C-multicast route or a Stan=
dby BGP<br>=C2=A0 =C2=A0 =C2=A0 C-multicast route for that state (or both)<=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
&gt; &gt;<br>
&gt; &gt; Section 6<br>
&gt; &gt;<br>
&gt; &gt; I could almost see the discussion of duplicate packets as being a=
<br>
&gt; &gt; subsection of the security considerations, though I don&#39;t min=
d leaving<br>
&gt; &gt; it as-is.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for agreeing.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Section 8<br>
&gt; &gt;<br>
&gt; &gt; We could perhaps make some pro forma note that the BFD Discrimina=
tor<br>
&gt; &gt; attribute, like all BGP attributes, typically does not benefit fr=
om<br>
&gt; &gt; cryptographic integrity protection and thus could be spoofed so a=
s to be<br>
&gt; &gt; different than what is actually used by the multipoint BFD head.=
=C2=A0 That<br>
&gt; &gt; said, I&#39;m willing to let this fall under the incorporated-by-=
reference<br>
&gt; &gt; BGP security considerations.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Is it worth noting that operating in &quot;hot&quot; standby mode=
 will increase<br>
&gt; &gt; the general level of traffic on the VPN and thus susceptibility t=
o DoS?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; We use hot standby in the control plane only. That would a=
dd some BGP<br>
&gt; traffic but would not as much as 1+1 protection in the data plane. I t=
hink<br>
&gt; that the amount of the additional load in the VPN with the &quot;hot s=
tandby&quot;<br>
&gt; defined in the draft unlikely to make PEs more volnurable to DoS. What=
 do<br>
&gt; you think?<br>
<br>
I think I was assuming this was &quot;hot&quot; in the data plane as well a=
s the<br>
control plane, when I Wrote the comment.=C2=A0 For just the control plane, =
your<br>
assessment seems reasonable.<br>
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 This document uses P2MP BFD, as defined in [RFC8562]=
, which, in turn,<br>
&gt; &gt;=C2=A0 =C2=A0 is based on [RFC5880].=C2=A0 Security considerations=
 relevant to each<br>
&gt; &gt;=C2=A0 =C2=A0 protocol are discussed in the respective protocol sp=
ecifications.=C2=A0 An<br>
&gt; &gt;=C2=A0 =C2=A0 implementation that supports this specification MUST=
 use a mechanism<br>
&gt; &gt;=C2=A0 =C2=A0 to control the maximum number of P2MP BFD sessions t=
hat can be active<br>
&gt; &gt;=C2=A0 =C2=A0 at the same time.<br>
&gt; &gt;<br>
&gt; &gt; What is the objective that this control is designed to achieve?=
=C2=A0 I can<br>
&gt; &gt; &quot;control the maximum number of sessions&quot; by asserting t=
he maximum number<br>
&gt; &gt; to be an absurdly large value, but I don&#39;t think that would m=
eet the<br>
&gt; &gt; spirit of this requirement (it does meet the letter of the requir=
ement).<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Though this recommendation may look as too vague, I think =
it is<br>
&gt; helpful to a developer. I imagine, as we&#39;ve discussed in regard to=
 the<br>
&gt; selection of the interval between BFD Control packets, an operator wil=
l<br>
&gt; consider the overall load of BFD Control packets across all active BFD=
<br>
&gt; sessions. Do you think that a sentence that connects the number of p2m=
p BFD<br>
&gt; sessions and the rate of BFD Control packets be helpful in this contex=
t?<br>
<br>
Or even another clause, maybe something like &quot;to limit the overall amo=
unt<br>
of capacity used by the BFD traffic&quot;.=C2=A0 (I think part of what trig=
gered my<br>
comment is that this is &quot;MUST use&quot;, not &quot;MUST provide&quot; =
-- the goal of a<br>
&quot;MUST provide&quot; is fairly obvious but &quot;MUST use&quot; with no=
 specific bound<br>
could be seen as make-work.)<br></blockquote><div>GIM2&gt;&gt; More thanks =
for this suggestion. I think that your clause is more general and better ex=
presses our concern in regard to the potential impact of using p2mp BFD. Be=
low is the new text I propose:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0This d=
ocument uses P2MP BFD, as defined in [RFC8562], which, in turn,<br>=C2=A0 =
=C2=A0is based on [RFC5880].=C2=A0 Security considerations relevant to each=
<br>=C2=A0 =C2=A0protocol are discussed in the respective protocol specific=
ations.=C2=A0 An<br>=C2=A0 =C2=A0implementation that supports this specific=
ation MUST provide a<br>=C2=A0 =C2=A0mechanism to limit the overall amount =
of capacity used by the BFD<br>=C2=A0 =C2=A0traffic (as the combination of =
the number of active P2MP BFD sessions<br><div>=C2=A0 =C2=A0and the rate of=
 BFD Control packets to process).=C2=A0</div><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204=
);padding-left:1ex">
<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 The methods described in Section 3.1 may produce fal=
se-negative state<br>
&gt; &gt;=C2=A0 =C2=A0 changes that can be the trigger for an unnecessary c=
onvergence in the<br>
&gt; &gt;=C2=A0 =C2=A0 control plane, ultimately negatively impacting the m=
ulticast service<br>
&gt; &gt;=C2=A0 =C2=A0 provided by the VPN.=C2=A0 An operator is expected t=
o consider the network<br>
&gt; &gt;=C2=A0 =C2=A0 environment and use available controls of the mechan=
ism used to<br>
&gt; &gt;=C2=A0 =C2=A0 determine the status of a P-tunnel.<br>
&gt; &gt;<br>
&gt; &gt; We mentioned earlier (e.g., in =C2=A73.1) that similar negative e=
ffects can<br>
&gt; &gt; occur when resiliency mechanisms at different layers interact; th=
at<br>
&gt; &gt; might be worth repeating here.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; One of such references is in Section 3.1.2:<br>
&gt;=C2=A0 =C2=A0 In many cases, it is not practical to use both protection=
<br>
&gt;=C2=A0 =C2=A0 methods at the same time because uncorrelated timers migh=
t cause<br>
&gt;=C2=A0 =C2=A0 unnecessary switchovers and destabilize the network.<br>
&gt; Thus we referred to Section 3.1 as the encompassing reference to all<b=
r>
&gt; possible scenarios. Would you agree with that?<br>
<br>
Wow, that looks like a real short-term memory failure on my part (=C2=A73.1=
 was<br>
mentioned just in the previous sentence!).=C2=A0 Sorry for the noise; this =
is<br>
fine as-is.<br>
<br>
Thanks again,<br>
<br>
Ben<br>
</blockquote></div></div>
</blockquote></div>

--00000000000060c31e05b6fcda49--


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To: Jeffrey Haas <jhaas@pfrc.org>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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I agree with that.

Thanks Jeff!

Alvaro.

On December 21, 2020 at 11:30:54 AM, Jeffrey Haas (jhaas@pfrc.org) wrote:

My recommendation is to extend WGLC to BFD and IDR.

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<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style>=
</head><body style=3D"word-wrap:break-word"><div style=3D"font-family:Helve=
tica,Arial;font-size:13px">I agree with that.</div><div style=3D"font-famil=
y:Helvetica,Arial;font-size:13px"><br></div><div style=3D"font-family:Helve=
tica,Arial;font-size:13px">Thanks Jeff!</div><div style=3D"font-family:Helv=
etica,Arial;font-size:13px"><br></div><div style=3D"font-family:Helvetica,A=
rial;font-size:13px">Alvaro.</div> <br><p class=3D"airmail_on">On December =
21, 2020 at 11:30:54 AM, Jeffrey Haas (<a href=3D"mailto:jhaas@pfrc.org">jh=
aas@pfrc.org</a>) wrote:</p> <blockquote type=3D"cite" class=3D"clean_bq"><=
span><div>My recommendation is to extend WGLC to BFD and IDR. </div></span>=
</blockquote> <div class=3D"gmail_signature"></div></body></html>

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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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On December 20, 2020 at 7:24:34 PM, Greg Mirsky wrote:

Greg:

Hi!

I'm leaving in only the parts where we don't agree or where I have commment=
s.

Thanks!

Alvaro.


...
> > ----------------------------------------------------------------------
> > DISCUSS:
> > ----------------------------------------------------------------------
> >
> > (1) This document describes several methods to determine the status of =
a
> > tunnel (in =C2=A73), none of which "provide a "fast failover" solution =
when
> > used alone, but can be used together with the mechanism described in
> > Section 4" (=C2=A71). =C2=A73 also says this:
> >
> > An implementation may support any combination of the methods
> > described in this section and provide a network operator with control
> > to choose which one to use in the particular deployment.
> >
> > While =C2=A73.1 is clear in the fact that it is not a requirement for a=
ll
> > downstream PEs to use the same mechanism, there are no guidelines to ai=
d
> > the operator to chose which mechanism to use. Some cases may be obvious
> > (e.g. =C2=A73.1.3 applies to tunnels of a specific type), but others ar=
e not.
> > I would like to see deployment considerations related to the advantages=
/
> > disadvantages that each method may have in specific situations (includi=
ng
> > their possible combination).
>
> GIM>> I think it might be not that simple to compare deployment challenge=
s
> and benefits resulting from the deployment of different P-tunnel monitori=
ng
> methods because we have to somehow abstract from an impact of choices mad=
e
> by respective implementations. Also, there probably should be a reference
> environment, a use case we agree with. I agree that such a comparative
> analysis of P-tunnel monitoring methods is useful it doesn't seem to bene=
fit
> this document as the choice of a developer which ones to implement and an
> operator which one to use don't affect the functionality discussed in the
> draft. Would you agree?

No, I don't. =C2=A0That's the reason for this DISCUSS point. :-)

Why is this document specifying multiple mechanisms? =C2=A0Why not specify
just one? =C2=A0At a high level, I assume the answer is that one size
doesn't fit all, and that specific deployments might benefit from
specific mechanisms while others may not be as useful. =C2=A0 I don't think
that to provide guidance (I'm not asking for in-depth analysis) there
needs to be a priori agreement on use cases, etc...beyond what the WG
has already been considering for the development of this document.

Your initial statement that "it might be not that simple to compare"
is precisely the reason I think that operational guidance is needed.



> > (2) The BFD Discriminator Attribute has a very narrow application in th=
is
> > document when compared to the potential other uses given the extensibil=
ity
> > possibilities related to bootstrapping BFD. I have serious concerns abo=
ut
> > the attribute being defined in this document, amongst a series of other
> > mechanisms.
> >
> > (2a) The tunnel can be monitored without the new BGP Attribute (assumin=
g
> > proper configuration of course). Why is that option is not even mention=
ed
> > in the document?
>
> GIM>> You are right, there could be other methods to bootstrap a p2mp BFD
> session. But since RFC 8562 has no discussion of bootstrapping a session,
> having it in this draft seemed somewhat out of place. We can add an
> informational reference to Section 4 of draft-mirsky-mpls-p2mp-bfd
> (https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-bfd/)where sever=
al
> bootstrapping options discussed. Would that be acceptable?

No, but thanks for pointing at that other draft which supports the
fact that the attribute is not the only way to bootstrap the session.

My point here is that you don't need the attribute for BFD to be an
useful tool. =C2=A0However, the description of the tool (monitoring) is
tied to the attribute (including the point below about deleting the
BFD session). =C2=A0It doesn't have to be: the use of BFD should be
independent of the bootstrapping mechanism.

Do you consider other possible ways of bootstrapping the session
valid? =C2=A0Would it be ok to use them to enable the use of BFD? =C2=A0Can=
 a
BFD session that is setup using a different mechanism used to monitor
the tunnel?



...
> > (2b) The fact that BFD monitoring can be achieved without the new
> > attribute makes me think that the bootstrapping of BFD using BGP would =
be
> > better served in a document produced by the BFD WG. One of the editors =
has
> > expressed the same opinion [1] [2]. Has a discussion taken place in the
> > BFD WG (or at least with the Chairs) about this work? Why was it not ta=
ken
> > up there?
> >
> GIM>> Work on draft-mirsky-mpls-p2mp-bfd is progressing at MPLS WG. AFAIK=
,
> it is in the state Candidate for WG Adoption. Moving the definition of th=
e
> BFD Discriminator attribute to that draft, as I understand, would require
> using it as the normative reference. Comparing the current states of both
> documents, would severely delay the publication of MVPN Fast Failover
> specification and likely affect implementations of P-tunnel monitoring
> mechanisms. I hope you can agree with the current organization of the
> document.

That doesn't address my question about whether this work should have
been done in the BFD WG -- as you had suggested (links above).

I'm sure you saw the message I sent to Reshad/Jeff on this topic.
I'll rely on their and Martin's opinion. =C2=A0BTW, I agree with Jeff in
that bfd/idr should be given the opportunity to review this document.





> > ----------------------------------------------------------------------
> > COMMENT:
> > ----------------------------------------------------------------------
...
> > (2) s/is an OPTIONAL procedure/is an optional procedure
> > This is not a normative statement to require capitalization.
>
> GIM>> I think that the use of the normative form is reasonable. The sente=
nce
> can be re-worded using MAY. For example:
> OLD TEXT:
> The procedure described here is an OPTIONAL procedure that is based
> on a downstream PE taking into account the status of P-tunnels rooted
> at each possible Upstream PE, for including or not including each
> given PE in the list of candidate UMHs for a given (C-S, C-G) state.
> NEW TEXT:
> The procedure described here MAY be used in a BGP/MPLS MVPN [RFC6513]. It=
 is
> based on a downstream PE taking into account the status of P-tunnels root=
ed
> at each possible Upstream PE, for including or not including each given P=
E
> in the list of candidate UMHs for a given (C-S, C-G) state.
>
> We wanted to stress that without this mechanism BGP/MPLS MVPN, as defined=
 in
> RFCs 6513 and 6514, is fully functional and architecturally complete. Thi=
s
> draft discusses mechanisms that support the protection and faster
> convergence in MVPN's control plane. And since these mechanisms only an
> improvement compared to the BGP mechanisms, we wanted to emphasize that b=
y
> using the normative form. Would you agree?

No, I don't. =C2=A0Normative language was not meant for emphasis. =C2=A0In =
any
case, this is not a blocking comment.




...
> > (4) =C2=A73.1.1: "similar to BGP next-hop tracking" Is this specified
> > somewhere? I don't remember seeing a specification for next-hop trackin=
g,
> > but do know that implementations do it -- in an implementation-specific
> > way. Please add a little more text about what is meant/expected.
>
> GIM>> Indeed, BGP next-hop tracking is internal to a system behavior that
> has not been, to the best of my knowledge, been documented at IETF or any
> SDO. Would the following text provide reasonable context information:
>
> That is similar to BGP next-hop tracking for VPN routes, except that
> the address considered is not the BGP next-hop address but the root
> address in the x-PMSI Tunnel attribute. BGP next-hop tracking is a
> feature that reduces the BGP convergence time comparing to the
> "regular" BGP by monitoring BGP next-hop address changes in the
> routing table. It's event-based because it detects changes in the
> routing table. When it detects a change, it performs a next-hop scan
> to find if any of the next hops in the BGP table is affected and updates
> it accordingly.

Suggestion:

OLD>
=C2=A0 =C2=A0BGP next-hop tracking is a feature that reduces the BGP conver=
gence time
=C2=A0 =C2=A0comparing to the "regular" BGP by monitoring BGP next-hop addr=
ess changes
=C2=A0 =C2=A0in the routing table. It's event-based because it detects chan=
ges in the
=C2=A0 =C2=A0routing table. When it detects a change, it performs a next-ho=
p scan to
=C2=A0 =C2=A0find if any of the next hops in the BGP table is affected and =
updates it
=C2=A0 =C2=A0accordingly.

NEW>
=C2=A0 =C2=A0BGP next-hop tracking monitors BGP next-hop address changes in=
 the routing
=C2=A0 =C2=A0table. =C2=A0In general, when a change is detected, it perform=
s a next-hop scan
=C2=A0 =C2=A0to find if any of the next hops in the BGP table is affected a=
nd updates it
=C2=A0 =C2=A0accordingly.>



...
> > (6) The "reachability condition" is mentioned in =C2=A73.1.1/=C2=A73.1.=
3/=C2=A73.1.4.
> > Does this mean that that root tracking (=C2=A73.1.1) should be used wit=
h the
> > other mechanisms? The specific text says that "the downstream PE can
> > immediately update its UMH when the reachability condition changes",
> > giving the impression that the combination is possible but not required=
.
> >
> > Note that =C2=A74.3 is titled "Reachability Determination", which I hop=
ed would
> > shed more light, but all it does is point back to =C2=A73.1.
>
> GIM>> I don't see any benefit of concurrently using more than one of the
> described in the document mechanisms that can monitor the state of a
> P-tunnel. That is certainly possible but, in my opinion, would add
> unnecessary complexity. The last paragraph in Section 3.1 is intended as =
the
> introduction to sub-sections that discuss different monitoring mechanisms=
:
>
> An implementation may support any combination of the methods
> described in this section and provide a network operator with control
> to choose which one to use in the particular deployment.
> Would you suggest an update to this paragraph to clarify the statement?

See the first DISCUSS point above.

You didn't explicitly answer the question: =C2=A0is the text in
=C2=A73.1.1/=C2=A73.1.3/=C2=A73.1.4 an implication that root tracking shoul=
d be used
with the other mechanisms? =C2=A0If not, then that does it mean?



...
> > (8) =C2=A73.1.2 mentions that "careful consideration and coordination" =
is
> > needed when using other mechanisms such as rfc4090 "because uncorrelate=
d
> > timers might cause unnecessary switchovers and destabilize the network.=
"
> > What are the associated timers related to the mechanisms in this sectio=
n?
>
> GIM>> This is in reference to the defect detection timers. When using
> multi-layer protection particular consideration must be given to the
> interaction of defect detections at different layers of a network. It s
> recommended to use longer detection intervals at the higher layers. Some
> recommendations suggest using a multiplier of 3 or larger, e.g., 10 msec
> detection for FRR and at least 100 msec for e2e detection.

Can you add something like that to the document?



...
> > (10) =C2=A73.1.4: "An Upstream PE SHOULD be removed from the UMH candid=
ate
> > list...if...the upstream one-hop branch of the tunnel from P to PE cann=
ot be
> > built." When is it ok to not remove the PE? IOW, why is this action not
> > required?
>
> GIM>> Thank you for bringing this case. It was discussed during Shepherd'=
s
> review and we've asked for the expert's opinion. Jeffrey Zhang kindly
> suggested the current text. (https://mailarchive.ietf.org/arch/browse/bes=
s/?gbt=3D1&index=3DLxKYi9F6u1tl2qKtR2Q8wkQPMOA)
> I'll check with him and get back with the answer.

ok.




...
> > (12) =C2=A73.1.5 says that "where this mechanism is used in conjunction=
 with
> > the method described in Section 5...downstream PEs can compare receptio=
n
> > on the two P-tunnels to determine when one of them is down", but =C2=A7=
5 says
> > that "downstream PEs accept traffic from the primary or standby tunnel,
> > based on the status of the tunnel (based on Section 3)". IOW, =C2=A73.1=
.5
> > points at =C2=A75 as providing a way to determine if a tunnel is down, =
while =C2=A75
> > points back at =C2=A73 as the way to determine which tunnel to receive =
from.
> > This pointing back and forth is not a total contradiction, but it needs=
 to
> > be clarified.
>
> GIM>> Though it might appear as a circular reference, it was not the
> intention. An implementation of the method described in the last paragrap=
h
> of Section 3.1.5 can periodically accept traffic from primary and standby
> tunnels s the method of determining the state of the primary P-tunnel. I'=
ve
> updated that paragraph to note that the comparison can be done periodical=
ly:
>
> OLD TEXT:
> In cases where this mechanism is used in conjunction with the method
> described in Section 5, no prior knowledge of the rate or maximum
> inter-packet time on the multicast streams is required; downstream
> PEs can compare actual packet reception statistics on the two
> P-tunnels to determine when one of them is down. The detailed
> specification of this mechanism is outside the scope of this
> document.
>
> NEW TEXT:
> In cases where this mechanism is used in conjunction with the method
> described in Section 5, no prior knowledge of the rate or maximum
> inter-packet time on the multicast streams is required; downstream
> PEs can periodically compare actual packet reception statistics on
> the two P-tunnels to determine when one of them is down. The
> detailed specification of this mechanism is outside the scope of this
> document.

Let me try again.

=C2=A73.1.5 says that the "PEs can compare reception on the two P-tunnels
to determine when one of them is down". =C2=A0OTOH, =C2=A75 says that the "=
PEs
accept traffic from the primary or standby tunnel, based on the status
of the tunnel". =C2=A0The difference that I'm trying to point at is that =
=C2=A75
says that traffic is accepted from only *one* tunnel ("primary *or*
standby"), but =C2=A73.1.5 talks about receiving from *both*.

Adding "periodically" doesn't help because the basic contradiction
(receiving from one or both) is still there.




> > (13) =C2=A73.1.6: "An implementation that does not recognize or is conf=
igured
> > not to support this attribute MUST follow procedures defined for option=
al
> > transitive path attributes in Section 5 of [RFC4271]."
> >
> > There cannot be a Normative action specified for a node that "does not
> > recognize...this attribute" because, by definition, it can't be assumed
> > that it is aware of this specification. In this case, it is not necessa=
ry
> > to say anything about unrecognized attributes because that is already
> > specified in rfc4271.
> >
> > For the "configured not to support this attribute" case, it should be
> > pointed out that the node should operate as if the attribute was
> > unrecognized.
> >
> > Suggestion>
> > An implementation that is configured not to support this attribute MUST
> > follow the procedures defined in Section 5 of [RFC4271] as if the attri=
bute
> > was unrecognized.
>
> GIM>> Thank you for pointing this out. In the course of addressing commen=
ts
> from other IESG reviewers, this text was updated to: This document define=
s
> the format and ways of using a new BGP attribute called the "BFD
> Discriminator". It is an optional transitive BGP attribute. Thus it is
> expected that an implementation that does not recognize or is configured =
not
> to support this attribute follows procedures defined for optional transit=
ive
> path attributes in Section 5 of [RFC4271].
> Would the current text address your concern?

Mmmm...sure.

rfc4271 doesn't talk about the case where a node is "configured not to
support" an attribute. =C2=A0The reason I suggested the specific link
("configured not to support this attribute...as if the attribute was
unrecognized.") is that the behavior of ignoring (which may be an
interpretation of "configured not to support") is different than if
the attribute was unrecognized. =C2=A0The text above doesn't make that link
and, while some implementations may interpret it the way you meant it,
others may not.




> > (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be considered m=
alformed
> > if its length is not a non-zero multiple of four." Ok, except that the
> > specification of the attribute doesn't mention the length (only the len=
gth
> > of the TLVs). Please specify the length and any considerations related =
to
> > the Extended Length bit. Also, given that this is a new attribute, with=
 an
> > unspecified potential number of TLVs, and that the length is apparently
> > unbounded, all leading to the potential need for extended messages, ple=
ase
> > specify how to handle peers that cannot accommodate more than 4k octet
> > messages (rfc8654).
>
> GIM>> I've noticed a note from Jeff Hass. Would you agree with his opinio=
n?

Partially. ;-)

He's right about the Extended Length bit.


My reference to rfc8654 is because of this text from =C2=A75:

=C2=A0 =C2=A0It is RECOMMENDED that BGP protocol developers and implementer=
s are
=C2=A0 =C2=A0conservative in their application and use of BGP Extended Mess=
ages.
=C2=A0 =C2=A0Future protocol specifications MUST describe how to handle pee=
rs that
=C2=A0 =C2=A0can only accommodate 4,096 octet messages.

As I mentioned before, it concerns me that the attribute (while having
a narrow use in this document) can have wider applicability. =C2=A0The
extensibility is significant by allowing sequential or nested TLVs.
This combination may result in a large attribute, leading to large
Updates, specially when considering other MVPN-related
attribute/communities, etc.

Considering the text in rfc8654, the question is: is the attribute
necessary always, or can it be removed/omitted in some cases? =C2=A0This is
not an attribute that is necessary for route selection, for example.
Given that rfc4271 says this:

=C2=A0 =C2=A0If, due to the limits on the maximum size of an UPDATE message=
 (see
=C2=A0 =C2=A0Section 4), a single route doesn't fit into the message, the B=
GP
=C2=A0 =C2=A0speaker MUST not advertise the route to its peers and MAY choo=
se to
=C2=A0 =C2=A0log an error locally.

...it may be possible that by not propagating the new attribute the
size of the update will be reduced so that the advertisement can be
made. =C2=A0OTOH, if the attribute is removed then the tunnel can't be
monitored.

All I want is for you to consider any potential implications of the
new attribute. =C2=A0The conclusion may be that no further change is
needed.




...
> > (17) =C2=A73.1.6.1: "MUST use its IP address as the source IP =C2=A0add=
ress" Which
> > address? Please be specific.
>
> GIM>> Section 3.1.6.1 includes the list that an Upstream PE is required t=
o
> follow: To enable downstream PEs to track the P-tunnel status using a poi=
nt-
> to-multipoint (P2MP) BFD session the Upstream PE:
> ....
> o MUST use its IP address as the source IP address when transmitting
> BFD Control packets;
> Would adding the reference to the Upstream PE address your concern:
> o MUST use its, i.e., the Upstream PE's, IP address as the source IP addr=
ess
> when transmitting BFD Control packets;

No -- the question is which address of the Upstream PE? =C2=A0I'm assuming
that an upstream PE can have several addresses, which one is to be
used? =C2=A0I can guess it is the address of the interface used to reach
the destination (or something like that)...but I would just want it to
be clear.




> > (18) =C2=A73.1.6.2: If the IP address doesn't map correctly at the down=
stream
> > PE (for example, a different local address is used that doesn't corresp=
ond
> > to the information in the PMSI attribute), what action should it take? =
Can
> > the tunnel still be monitored?
>
> GIM>> There's a possibility that the same downstream PE is monitoring mor=
e
> than one P-tunnel. Since each Upstream PE assigns its own BFD Discriminat=
or,
> there's a chance that the same value is picked by more than one Upstream =
PE.
> According to Section 5.7 of the RFC 8562:
> IP and MPLS multipoint tails MUST demultiplex BFD packets based on a
> combination of the source address, My Discriminator, and the identity
> of the multipoint path that the multipoint BFD Control packet was
> received from. Together they uniquely identify the head of the
> multipoint path.
>
> We may consider adding the source address in the BFD Discriminator attrib=
ute
> as an optional TLV. I think that might be a good extension that can be
> introduced in a new document.

Why wait for a new document? =C2=A0You made a pretty good case for
signaling the source address.



...
> > (22) =C2=A74: "Such behavior is referred to as "revertive" behavior and=
 MUST be
> > supported." The text around this sentence seems to indicate that the
> > revertive behavior is the default, is that the intent? Or if the intent
> > for it just to be supported (as written)? Please be clear.
>
> GIM>> This part of the document has been updated in the course of address=
ing
> IESG comments:
> Such behavior is referred to as "revertive" behavior and MUST be supporte=
d.
> Non-revertive behavior refers to the behavior of continuing to select the
> backup PE as the UMH even after the Primary has come up. This non-reverti=
ve
> behavior MAY also be supported by an implementation and would be enabled
> through some configuration. Selection of the behavior, revertive or
> non-revertive, is an operational issue, but it MUST be consistent on all =
PEs
> in the given MVPN.
>
> Do you find the updated text clear enough?

Yes. =C2=A0But it now brings up a new question: can you provide operational
guidance on the selection of this behavior?



> > (23) =C2=A74.1: "...routes that carry the "Standby PE" BGP Community MU=
ST have
> > the LOCAL_PREF attribute set to zero." What should a receiver do if the
> > LOCAL_PREF is not zero?
>
> GIM>> I believe that the preceding text describes the situation when the
> LOCAL_PREF !=3D 0:
> ... two different downstream PEs
> consider different Upstream PEs to be the primary one. In that case,
> without any precaution taken, both Upstream PEs would process a
> standby C-multicast route and possibly stop forwarding at the same
> time.

No, it doesn't. =C2=A0The text specifies that the update "MUST have the
LOCAL_PREF attribute set to zero". =C2=A0The question is not about the
potential effect, but about the value being anything else (> 0). =C2=A0Note
that the value can be low enough (> 0) and no adverse effect may take
place, but the text doesn't specify a "low value", it explicitly
specifies 0.



> > (24) =C2=A74.1: In the last paragraph of this section, if I follow corr=
ectly,
> > the text talks about the case where the standby becomes the primary and
> > the updated advertisement doesn't have the Standby PE community. If tha=
t
> > is correct, then s/ presence/absence of the Standby PE BGP Community/
> > absence of the Standby PE BGP Community
> >
> > Also, the last sentence says that the "LOCAL_PREF attribute MUST be set=
 to
> > zero". If the community is not present, how can a receiver enforce this=
?
> > What action should it take if the LOCAL_PREF has a different value?
>
> GIM>> Thank you for the suggestion, it clarifies the text. As I understan=
d,
> the requirement is for the Standby Upstream PE, not for a downstream PE. =
Would
> the following update make that clearer:
> OLD TEXT:
> The LOCAL_PREF attribute MUST be set to zero.
> NEW TEXT:
> The new Upstream PE MUST set the LOCAL_PREF attribute to
> zero for that C-multicast route.

I don't know what the difference in the meaning is. :-(

There are three parts to my question:

(1) If the community is not present, then this would be a "normal"
Update. =C2=A0How does the receiver know the difference so it can enforce
the "MUST"?

(2) What should the receiver do if the value is not as specified?

(3) Given that the LOCAL_PREF for Updates *with* the community MUST be
0, what's the use of sending Updates *without* the community with the
same value?


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From: Greg Mirsky <gregimirsky@gmail.com>
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: Alvaro Retana <aretana.ietf@gmail.com>, The IESG <iesg@ietf.org>,  draft-ietf-bess-mvpn-fast-failover@ietf.org, bess-chairs@ietf.org,  BESS <bess@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>, bfd-chairs@ietf.org
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Hi Jeff,
thank you for your quick detailed response. Please find my follow-up notes
in-line tagged by GIM2>>.

Regards,
Greg

On Mon, Dec 21, 2020 at 5:42 AM Jeffrey Haas <jhaas@pfrc.org> wrote:

> Greg,
>
> On Sun, Dec 20, 2020 at 04:25:21PM -0800, Greg Mirsky wrote:
> > GIM>> In Section 7.2 we're requesting IANA to create a new sub-registry.
> > New types of a BFD session can be bootstrapped using the BGP BFD
> > Discriminator attribute. For example, draft-ietf-bess-evpn-bfd
> > <
> https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-bfd/?include_text=1>
> may
> > introduce a new BFD Mode value. Would you suggest larger field for BFD
> Mode
> > or an alternative method to signal the type of the BFD session to which
> the
> > value in the BFD Discriminator field is applicable? I thought that, in
> some
> > cases, a new value for p2mp with Active Tail Unsolicited Notifications or
> > p2mp Active Tail with Polling would be added.
>
> The property I'm talking about here is that the BFD Discriminator attribute
> is not repeating.  You can have exactly one BFD mode in the Path Attribute.
>
> If the intent was to permit more than one type, the BFD Mode would be
> followed by a length field - likely 2 octets long.
>
GIM2>> At this time I don't see a use case for the same BGP speaker
advertising more than one type of BFD session.

>
>
>
> >
> > > - The length handling text is likely not correct:
> > >   "The BFD Discriminator attribute MUST be considered malformed if its
> > >    length is not a non-zero multiple of four."
> > >   The implication is a length of four, which would have no BFD
> > >   Discriminator, should be considered a valid PDU.  Note that the
> length
> > >   considerations are further compounded by the padding issue for
> optional
> > >   sub-tlvs in the prior point.
> > >
> > GIM>> Thank you for pointing this case out. I agree, that is not what we
> > wanted. Following updates noted above the new text is as follows:
> > NEW TEXT:
> >    The BFD Discriminator attribute MUST be considered malformed if its
> >    length is smaller than five octets or the value of the BFD Mode field
> >    is unrecognized.  If the attribute is deemed to be malformed, the
> >    UPDATE message SHALL be handled using the approach of Attribute
> >    Discard per [RFC7606].
>
> The 5 octet minimum length is probably worth having as a condition.
>
> The unrecognized doesn't follow BGP philosophy very well.  Incremental
> deployment of BGP features often requires some devices that are simply
> transporting the routes, but not utilizing them, to pass things they don't
> fully understand.
>
> I suggest dropping the "or the value of the BFD Mode field is
> unrecognized".
>
GIM2>> Agree.

>
> Having text that says "if Optional TLVs are present, but not well formed,
> the entire Path Attribute is malformed and should be handled using
> Attribute
> Discard".
>
GIM2>>  Could it be used to replace the "unrecognized value" clause to make
the updated text as follows:
NEW TEXT:
   The BFD Discriminator attribute MUST be considered malformed if its
   length is smaller than five octets or if Optional TLVs are present,
   but not well-formed.  If the attribute is deemed to be malformed, the
   UPDATE message SHALL be handled using the approach of Attribute
   Discard per [RFC7606].

>
> The implication is that if there's more than one BFD Discriminator that any
> BFD Mode TLV (if the change is made above for multiple) that is malformed
> is
> reason to discard the entire feature.
>
GIM2>> Do you see as useful a reference to clause g in Section 3 of the RFC
7606 that states:
       If any other attribute (whether
       recognized or unrecognized) appears more than once in an UPDATE
       message, then all the occurrences of the attribute other than the
       first one SHALL be discarded and the UPDATE message will continue
       to be processed.


> > > Since a BFD discriminator is 4-octets, I'm curious as to what
> discussion
> > > the
> > > working group may have had with regard to using a BGP Extended
> Community
> > > instead?  In particular, the BGP Extended Community's Transitive bit
> might
> > > be useful in many multicast VPN scenarios operating over a single AS to
> > > limit the distribution scope of this Discriminator.
> > >
> > GIM>> I agree that the BGP Extended Community attribute can address the
> > immediate problem and be used to bootstrap a p2mp BFD session. It would
> > even have space for the BFD Mode field. But because the length of the BFD
> > Extended Communities attribute is fixed, it seems that no further
> > extensions (e.g., providing the MultipointHead's source IP address) be
> > possible.
>
> There we go - a motivation. :-)
>
>
> -- Jeff
>

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Jeff,<div>thank you for your quick det=
ailed response. Please find my follow-up notes in-line tagged by GIM2&gt;&g=
t;.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><div cl=
ass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Dec 21, 2=
020 at 5:42 AM Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@pfr=
c.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">Greg,<br>
<br>
On Sun, Dec 20, 2020 at 04:25:21PM -0800, Greg Mirsky wrote:<br>
&gt; GIM&gt;&gt; In Section 7.2 we&#39;re requesting IANA to create a new s=
ub-registry.<br>
&gt; New types of a BFD session can be bootstrapped using the BGP BFD<br>
&gt; Discriminator attribute. For example, draft-ietf-bess-evpn-bfd<br>
&gt; &lt;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-b=
fd/?include_text=3D1" rel=3D"noreferrer" target=3D"_blank">https://datatrac=
ker.ietf.org/doc/draft-ietf-bess-evpn-bfd/?include_text=3D1</a>&gt; may<br>
&gt; introduce a new BFD Mode value. Would you suggest larger field for BFD=
 Mode<br>
&gt; or an alternative method to signal the type of the BFD session to whic=
h the<br>
&gt; value in the BFD Discriminator field is applicable? I thought that, in=
 some<br>
&gt; cases, a new value for p2mp with Active Tail Unsolicited Notifications=
 or<br>
&gt; p2mp Active Tail with Polling would be added.<br>
<br>
The property I&#39;m talking about here is that the BFD Discriminator attri=
bute<br>
is not repeating.=C2=A0 You can have exactly one BFD mode in the Path Attri=
bute.<br>
<br>
If the intent was to permit more than one type, the BFD Mode would be<br>
followed by a length field - likely 2 octets long.<br></blockquote><div>GIM=
2&gt;&gt; At this time I don&#39;t see a use case for the same BGP speaker =
advertising more than one type of BFD session.=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
<br>
<br>
&gt; <br>
&gt; &gt; - The length handling text is likely not correct:<br>
&gt; &gt;=C2=A0 =C2=A0&quot;The BFD Discriminator attribute MUST be conside=
red malformed if its<br>
&gt; &gt;=C2=A0 =C2=A0 length is not a non-zero multiple of four.&quot;<br>
&gt; &gt;=C2=A0 =C2=A0The implication is a length of four, which would have=
 no BFD<br>
&gt; &gt;=C2=A0 =C2=A0Discriminator, should be considered a valid PDU.=C2=
=A0 Note that the length<br>
&gt; &gt;=C2=A0 =C2=A0considerations are further compounded by the padding =
issue for optional<br>
&gt; &gt;=C2=A0 =C2=A0sub-tlvs in the prior point.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Thank you for pointing this case out. I agree, that is not=
 what we<br>
&gt; wanted. Following updates noted above the new text is as follows:<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The BFD Discriminator attribute MUST be considered malfor=
med if its<br>
&gt;=C2=A0 =C2=A0 length is smaller than five octets or the value of the BF=
D Mode field<br>
&gt;=C2=A0 =C2=A0 is unrecognized.=C2=A0 If the attribute is deemed to be m=
alformed, the<br>
&gt;=C2=A0 =C2=A0 UPDATE message SHALL be handled using the approach of Att=
ribute<br>
&gt;=C2=A0 =C2=A0 Discard per [RFC7606].<br>
<br>
The 5 octet minimum length is probably worth having as a condition.<br>
<br>
The unrecognized doesn&#39;t follow BGP philosophy very well.=C2=A0 Increme=
ntal<br>
deployment of BGP features often requires some devices that are simply<br>
transporting the routes, but not utilizing them, to pass things they don&#3=
9;t<br>
fully understand.<br>
<br>
I suggest dropping the &quot;or the value of the BFD Mode field is unrecogn=
ized&quot;.<br></blockquote><div>GIM2&gt;&gt; Agree.=C2=A0</div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex">
<br>
Having text that says &quot;if Optional TLVs are present, but not well form=
ed,<br>
the entire Path Attribute is malformed and should be handled using Attribut=
e<br>
Discard&quot;.<br></blockquote><div>GIM2&gt;&gt;=C2=A0 Could it be used to =
replace the &quot;unrecognized value&quot; clause to make the updated text =
as follows:</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0The BFD Discriminato=
r attribute MUST be considered malformed if its<br>=C2=A0 =C2=A0length is s=
maller than five octets or if Optional TLVs are present,<br>=C2=A0 =C2=A0bu=
t not well-formed.=C2=A0 If the attribute is deemed to be malformed, the<br=
>=C2=A0 =C2=A0UPDATE message SHALL be handled using the approach of Attribu=
te<br>=C2=A0 =C2=A0Discard per [RFC7606].<br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex">
<br>
The implication is that if there&#39;s more than one BFD Discriminator that=
 any<br>
BFD Mode TLV (if the change is made above for multiple) that is malformed i=
s<br>
reason to discard the entire feature.<br></blockquote><div>GIM2&gt;&gt; Do =
you see as useful a reference to clause g in Section 3 of the RFC 7606 that=
 states:</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0If any other attribute (wheth=
er</div>=C2=A0 =C2=A0 =C2=A0 =C2=A0recognized or unrecognized) appears more=
 than once in an UPDATE<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0message, then all the=
 occurrences of the attribute other than the<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0=
first one SHALL be discarded and the UPDATE message will continue<br>=C2=A0=
 =C2=A0 =C2=A0 =C2=A0to be processed.</div><div class=3D"gmail_quote"><br><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
&gt; &gt; Since a BFD discriminator is 4-octets, I&#39;m curious as to what=
 discussion<br>
&gt; &gt; the<br>
&gt; &gt; working group may have had with regard to using a BGP Extended Co=
mmunity<br>
&gt; &gt; instead?=C2=A0 In particular, the BGP Extended Community&#39;s Tr=
ansitive bit might<br>
&gt; &gt; be useful in many multicast VPN scenarios operating over a single=
 AS to<br>
&gt; &gt; limit the distribution scope of this Discriminator.<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; I agree that the BGP Extended Community attribute can addr=
ess the<br>
&gt; immediate problem and be used to bootstrap a p2mp BFD session. It woul=
d<br>
&gt; even have space for the BFD Mode field. But because the length of the =
BFD<br>
&gt; Extended Communities attribute is fixed, it seems that no further<br>
&gt; extensions (e.g., providing the MultipointHead&#39;s source IP address=
) be<br>
&gt; possible.<br>
<br>
There we go - a motivation. :-)<br>
<br>
<br>
-- Jeff<br>
</blockquote></div></div>

--0000000000009badfd05b6ffdca9--


From nobody Mon Dec 21 15:28:55 2020
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Date: Mon, 21 Dec 2020 18:46:22 -0500
From: Jeffrey Haas <jhaas@pfrc.org>
To: Greg Mirsky <gregimirsky@gmail.com>
Cc: Alvaro Retana <aretana.ietf@gmail.com>, The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org, bess-chairs@ietf.org, BESS <bess@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>, bfd-chairs@ietf.org
Message-ID: <20201221234621.GE23143@pfrc.org>
References: <160807379483.25352.17040820176966456047@ietfa.amsl.com> <20201216212141.GB24940@pfrc.org> <CA+RyBmXdYBO66J+4-oFAikPgt9YGMHTb9x773RGPEDYV-NF+-Q@mail.gmail.com> <20201221140007.GB23143@pfrc.org> <CA+RyBmUjbkzvDsasZzT+uv+3fT6SUFmDDu9p+VDDxMd6uSh8jA@mail.gmail.com>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Greg,

On Mon, Dec 21, 2020 at 01:08:26PM -0800, Greg Mirsky wrote:
> > If the intent was to permit more than one type, the BFD Mode would be
> > followed by a length field - likely 2 octets long.
> >
> GIM2>> At this time I don't see a use case for the same BGP speaker
> advertising more than one type of BFD session.

Consider the example where BFD or S-BFD were options.  Consider that S-BFD
might be preferred, but regular BFD was being offered as an option.  How do
you encode that?

> NEW TEXT:
>    The BFD Discriminator attribute MUST be considered malformed if its
>    length is smaller than five octets or if Optional TLVs are present,
>    but not well-formed.  If the attribute is deemed to be malformed, the
>    UPDATE message SHALL be handled using the approach of Attribute
>    Discard per [RFC7606].

That text is better. Thanks.

> > The implication is that if there's more than one BFD Discriminator that any
> > BFD Mode TLV (if the change is made above for multiple) that is malformed
> > is
> > reason to discard the entire feature.
> >
> GIM2>> Do you see as useful a reference to clause g in Section 3 of the RFC
> 7606 that states:
>        If any other attribute (whether
>        recognized or unrecognized) appears more than once in an UPDATE
>        message, then all the occurrences of the attribute other than the
>        first one SHALL be discarded and the UPDATE message will continue
>        to be processed.

I wouldn't cite that one.  Its intent is that if you had more than one BFD
Path Attribute present in the Update, not that there may be more than one
BFD Mode in the BFD Path Attribute.

-- Jeff


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From: Greg Mirsky <gregimirsky@gmail.com>
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: Alvaro Retana <aretana.ietf@gmail.com>, The IESG <iesg@ietf.org>,  draft-ietf-bess-mvpn-fast-failover@ietf.org, bess-chairs@ietf.org,  BESS <bess@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>, bfd-chairs@ietf.org
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--00000000000064e86505b7033d0f
Content-Type: text/plain; charset="UTF-8"

Hi Jeff,
RE: the use case for multiple BFD discriminators listed in the BGP BFD
Discriminator attribute.
As I understand BFD and S-BFD, a discriminator value a node would advertise
has different contexts in BFD and S-BFD. In the former case - that is the
value node would use as My Discriminator, while in the latter- a remote
S-BFD system must use as Your Discriminator. Additionally, I don't think
that S-BFD has been defined for p2mp networks (I'm not sure it can work in
p2mp). And there's draft-ietf-idr-bgp-ls-sbfd-extensions
<https://tools.ietf.org/html/draft-ietf-idr-bgp-ls-sbfd-extensions-04> that
   defines extensions to the BGP Link-state address-family to
   carry the S-BFD Discriminators information via BGP.
As I understand it, to advertise a Discriminator for S-BFD, a node will
follow the mechanism defined in draft-ietf-idr-bgp-ls-sbfd-extensions.
What do you think?

Regards,
Greg

On Mon, Dec 21, 2020 at 3:28 PM Jeffrey Haas <jhaas@pfrc.org> wrote:

> Greg,
>
> On Mon, Dec 21, 2020 at 01:08:26PM -0800, Greg Mirsky wrote:
> > > If the intent was to permit more than one type, the BFD Mode would be
> > > followed by a length field - likely 2 octets long.
> > >
> > GIM2>> At this time I don't see a use case for the same BGP speaker
> > advertising more than one type of BFD session.
>
> Consider the example where BFD or S-BFD were options.  Consider that S-BFD
> might be preferred, but regular BFD was being offered as an option.  How do
> you encode that?
>
> > NEW TEXT:
> >    The BFD Discriminator attribute MUST be considered malformed if its
> >    length is smaller than five octets or if Optional TLVs are present,
> >    but not well-formed.  If the attribute is deemed to be malformed, the
> >    UPDATE message SHALL be handled using the approach of Attribute
> >    Discard per [RFC7606].
>
> That text is better. Thanks.
>
> > > The implication is that if there's more than one BFD Discriminator
> that any
> > > BFD Mode TLV (if the change is made above for multiple) that is
> malformed
> > > is
> > > reason to discard the entire feature.
> > >
> > GIM2>> Do you see as useful a reference to clause g in Section 3 of the
> RFC
> > 7606 that states:
> >        If any other attribute (whether
> >        recognized or unrecognized) appears more than once in an UPDATE
> >        message, then all the occurrences of the attribute other than the
> >        first one SHALL be discarded and the UPDATE message will continue
> >        to be processed.
>
> I wouldn't cite that one.  Its intent is that if you had more than one BFD
> Path Attribute present in the Update, not that there may be more than one
> BFD Mode in the BFD Path Attribute.
>
> -- Jeff
>

--00000000000064e86505b7033d0f
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Jeff,<br><div>RE: the use case for multiple BFD discrim=
inators listed in the BGP BFD Discriminator attribute.</div><div>As I under=
stand BFD and S-BFD, a discriminator value a node would advertise has diffe=
rent contexts in BFD and S-BFD. In the former case - that is the value node=
 would use as My Discriminator, while in the latter- a remote S-BFD system =
must use as Your Discriminator. Additionally, I don&#39;t think that S-BFD =
has been defined for p2mp networks (I&#39;m not sure it can work in p2mp). =
And there&#39;s=C2=A0<a href=3D"https://tools.ietf.org/html/draft-ietf-idr-=
bgp-ls-sbfd-extensions-04">draft-ietf-idr-bgp-ls-sbfd-extensions</a>=C2=A0t=
hat</div><div>=C2=A0 =C2=A0defines extensions to the BGP Link-state address=
-family to<br>=C2=A0 =C2=A0carry the S-BFD Discriminators information via B=
GP.<br></div><div>As I understand it, to advertise a Discriminator for S-BF=
D, a node will follow the mechanism defined in=C2=A0draft-ietf-idr-bgp-ls-s=
bfd-extensions.</div><div>What do you think?</div><div><br></div><div>Regar=
ds,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"lt=
r" class=3D"gmail_attr">On Mon, Dec 21, 2020 at 3:28 PM Jeffrey Haas &lt;<a=
 href=3D"mailto:jhaas@pfrc.org">jhaas@pfrc.org</a>&gt; wrote:<br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex">Greg,<br>
<br>
On Mon, Dec 21, 2020 at 01:08:26PM -0800, Greg Mirsky wrote:<br>
&gt; &gt; If the intent was to permit more than one type, the BFD Mode woul=
d be<br>
&gt; &gt; followed by a length field - likely 2 octets long.<br>
&gt; &gt;<br>
&gt; GIM2&gt;&gt; At this time I don&#39;t see a use case for the same BGP =
speaker<br>
&gt; advertising more than one type of BFD session.<br>
<br>
Consider the example where BFD or S-BFD were options.=C2=A0 Consider that S=
-BFD<br>
might be preferred, but regular BFD was being offered as an option.=C2=A0 H=
ow do<br>
you encode that?<br>
<br>
&gt; NEW TEXT:<br>
&gt;=C2=A0 =C2=A0 The BFD Discriminator attribute MUST be considered malfor=
med if its<br>
&gt;=C2=A0 =C2=A0 length is smaller than five octets or if Optional TLVs ar=
e present,<br>
&gt;=C2=A0 =C2=A0 but not well-formed.=C2=A0 If the attribute is deemed to =
be malformed, the<br>
&gt;=C2=A0 =C2=A0 UPDATE message SHALL be handled using the approach of Att=
ribute<br>
&gt;=C2=A0 =C2=A0 Discard per [RFC7606].<br>
<br>
That text is better. Thanks.<br>
<br>
&gt; &gt; The implication is that if there&#39;s more than one BFD Discrimi=
nator that any<br>
&gt; &gt; BFD Mode TLV (if the change is made above for multiple) that is m=
alformed<br>
&gt; &gt; is<br>
&gt; &gt; reason to discard the entire feature.<br>
&gt; &gt;<br>
&gt; GIM2&gt;&gt; Do you see as useful a reference to clause g in Section 3=
 of the RFC<br>
&gt; 7606 that states:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 If any other attribute (whether<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 recognized or unrecognized) appears more th=
an once in an UPDATE<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 message, then all the occurrences of the at=
tribute other than the<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 first one SHALL be discarded and the UPDATE=
 message will continue<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 to be processed.<br>
<br>
I wouldn&#39;t cite that one.=C2=A0 Its intent is that if you had more than=
 one BFD<br>
Path Attribute present in the Update, not that there may be more than one<b=
r>
BFD Mode in the BFD Path Attribute.<br>
<br>
-- Jeff<br>
</blockquote></div>

--00000000000064e86505b7033d0f--


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Subject: [bess] I-D Action: draft-ietf-bess-rfc7432bis-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

        Title           : BGP MPLS-Based Ethernet VPN
        Authors         : Ali Sajassi
                          John Drake
                          Jorge Rabadan
	Filename        : draft-ietf-bess-rfc7432bis-00.txt
	Pages           : 65
	Date            : 2020-12-21

Abstract:
   This document describes procedures for BGP MPLS-based Ethernet VPNs
   (EVPN).  The procedures described here meet the requirements
   specified in RFC 7209 -- "Requirements for Ethernet VPN (EVPN)".


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-rfc7432bis/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-rfc7432bis-00
https://datatracker.ietf.org/doc/html/draft-ietf-bess-rfc7432bis-00


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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Reviewer: Ravi Singh
Review result: Has Nits

Hello,

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing ADs.
For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it would
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or by
updating the draft.

Document: draft-ietf-bess-evpn-proxy-arp-nd
Reviewer: Ravi Singh
Review Date: 21 Dec 2020
Intended Status: Standards track (as listed on the draft)

Summary:

This document is basically ready for publication, but has nits that should be
considered prior to publication.

Comments:

The draft is generally well written and easy to understand.
It basically is a description to explain how ARP, ND, EVPN should work together
to reduce forwarding of ARP queries and/or NS messages, in an EVPN deployment,
by the use of gratuitous ARP/ND. The abstract, though, could be made more
direct by stating as such.

Major Issues: none found.

Minor Issues: none found.

Nits:
1. Figure 1: please show which device owns IP3, for more clarity.

2.      Section 4.6 (a):
        a. "       IP moves before the timer expires (default value of N=5), it
       concludes that a duplicate IP situation has occurred.  An IP move". It
       would be nice to elaborate on why the default value of "5" is
       recommended. Why not 1? Too much thrashing? However, for the cases where
       there is no thrashing, having a value of 5 as default slows the DAD
       procedure. Any recommendation on how to address that?
        b.      Minor typo: "       owner and spoofer keep replying to the
        CONFIRM message, the PE
       will detect the duplicate IP within the M timer:" ->
                "      owner and spoofer keep replying to the CONFIRM message,
                the PE
       will detect the duplicate IP within the M-second timer:"

3. Biggest nit: the draft does not really specify any new messaging formats or
any new fields. It is basically saying how the existing ARP, ND, EVPN
messaging/machinery (should) work together to achieve flooding-minimization of
ARP/ND queries in EVPN. Given the foregoing, it is not clear to me if the draft
really should be considered "standards track" instead of "informational". The
chairs are requested to evaluate that.

Best regards
Ravi



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From: Greg Mirsky <gregimirsky@gmail.com>
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To: Alvaro Retana <aretana.ietf@gmail.com>
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Hi Alvaro,
thank you for giving me more details to work with. Please find my notes and
the new proposed updates in-line below under the GIM2>> tag. Attached is
the diff that highlights changes related to your DISCUSS and COMMENT.

Regards,
Greg

On Mon, Dec 21, 2020 at 12:01 PM Alvaro Retana <aretana.ietf@gmail.com>
wrote:

> On December 20, 2020 at 7:24:34 PM, Greg Mirsky wrote:
>
> Greg:
>
> Hi!
>
> I'm leaving in only the parts where we don't agree or where I have
> commments.
>
> Thanks!
>
> Alvaro.
>
>
> ...
> > > ---------------------------------------------------------------------=
-
> > > DISCUSS:
> > > ---------------------------------------------------------------------=
-
> > >
> > > (1) This document describes several methods to determine the status o=
f
> a
> > > tunnel (in =C2=A73), none of which "provide a "fast failover" solutio=
n when
> > > used alone, but can be used together with the mechanism described in
> > > Section 4" (=C2=A71). =C2=A73 also says this:
> > >
> > > An implementation may support any combination of the methods
> > > described in this section and provide a network operator with control
> > > to choose which one to use in the particular deployment.
> > >
> > > While =C2=A73.1 is clear in the fact that it is not a requirement for=
 all
> > > downstream PEs to use the same mechanism, there are no guidelines to
> aid
> > > the operator to chose which mechanism to use. Some cases may be obvio=
us
> > > (e.g. =C2=A73.1.3 applies to tunnels of a specific type), but others =
are
> not.
> > > I would like to see deployment considerations related to the
> advantages/
> > > disadvantages that each method may have in specific situations
> (including
> > > their possible combination).
> >
> > GIM>> I think it might be not that simple to compare deployment
> challenges
> > and benefits resulting from the deployment of different P-tunnel
> monitoring
> > methods because we have to somehow abstract from an impact of choices
> made
> > by respective implementations. Also, there probably should be a referen=
ce
> > environment, a use case we agree with. I agree that such a comparative
> > analysis of P-tunnel monitoring methods is useful it doesn't seem to
> benefit
> > this document as the choice of a developer which ones to implement and =
an
> > operator which one to use don't affect the functionality discussed in t=
he
> > draft. Would you agree?
>
> No, I don't.  That's the reason for this DISCUSS point. :-)
>
> Why is this document specifying multiple mechanisms?  Why not specify
> just one?  At a high level, I assume the answer is that one size
> doesn't fit all, and that specific deployments might benefit from
> specific mechanisms while others may not be as useful.   I don't think
> that to provide guidance (I'm not asking for in-depth analysis) there
> needs to be a priori agreement on use cases, etc...beyond what the WG
> has already been considering for the development of this document.
>
> Your initial statement that "it might be not that simple to compare"
> is precisely the reason I think that operational guidance is needed.
>
GIM2>> I propose a new sub-section to summarize the benefits and challenges
of methods described in Section 3.1:
3.1.8.  Operational Considerations for Monitoring P-Tunnel's Status

   Several methods to monitor the status of a P-tunnel are described in
   Section 3.1.  Though there might be no perfect method, a comparison
   of benefits and challenges of each technique could be helpful to both
   implementors and network operators.

   Tracking the root of an MVPN (Section 3.1.1) concludes about the
   status of a P-tunnel based on the control plane information.
   Because, in general, the MPLS data plane is not fate-sharing with the
   control plane, this method might produce false positive or false
   negative alarms.  On the other hand, because BGP next-hop tracking is
   broadly supported and deployed, this method might be the easiest to
   deploy.

   Method described in Section 3.1.2 monitors the state of the data
   plane but only for an egress P-PE link of a P-tunnel.  As a result,
   network failures that affect upstream links might not be detected
   using this method and the MVPN convergence would be determined by the
   convergence of the BGP control plane.

   Using the state change of a P2MP RSVP-TE LSP as the trigger to re-
   evaluate the status of the P-tunnel (Section 3.1.3) relies on the
   mechanism used to monitor the state of the P2MP LSP.

   The method described in Section 3.1.4 is simple and prone to false
   alarms but it is applicable to a sub-set of MVPNs, those that use the
   leaf-triggered x-PMSI tunnels.

   Though some MVPN might be used to provide a multicast service with
   predictable interpacket interval (Section 3.1.5), the number of such
   cases seem limited.

   Monitoring the status of a P-tunnel using p2mp BFD session
   (Section 3.1.6) may produce the most accurate and expedient failure
   notification of all monitoring methods discussed.  On the other hand,
   it requires careful consideration of the additional load of BFD onto
   network and PE nodes.

>
>
>
> > > (2) The BFD Discriminator Attribute has a very narrow application in
> this
> > > document when compared to the potential other uses given the
> extensibility
> > > possibilities related to bootstrapping BFD. I have serious concerns
> about
> > > the attribute being defined in this document, amongst a series of oth=
er
> > > mechanisms.
> > >
> > > (2a) The tunnel can be monitored without the new BGP Attribute
> (assuming
> > > proper configuration of course). Why is that option is not even
> mentioned
> > > in the document?
> >
> > GIM>> You are right, there could be other methods to bootstrap a p2mp B=
FD
> > session. But since RFC 8562 has no discussion of bootstrapping a sessio=
n,
> > having it in this draft seemed somewhat out of place. We can add an
> > informational reference to Section 4 of draft-mirsky-mpls-p2mp-bfd
> > (https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-bfd/)where
> several
> > bootstrapping options discussed. Would that be acceptable?
>
> No, but thanks for pointing at that other draft which supports the
> fact that the attribute is not the only way to bootstrap the session.
>
> My point here is that you don't need the attribute for BFD to be an
> useful tool.  However, the description of the tool (monitoring) is
> tied to the attribute (including the point below about deleting the
> BFD session).  It doesn't have to be: the use of BFD should be
> independent of the bootstrapping mechanism.
>
> Do you consider other possible ways of bootstrapping the session
> valid?  Would it be ok to use them to enable the use of BFD?  Can a
> BFD session that is setup using a different mechanism used to monitor
> the tunnel?
>

GIM2>> Thank you for clarifying the question. Yes, a p2mp BFD session can
be instantiated using some other than the BFD Discriminator attribute
method. draft-mirsky-mpls-p2mp-bfd gives several options and describes how
MPLS LSP Ping can be used. But that method, in my opinion, has some
operational issues and is less preferable compared to using an extension of
a control plane protocol. Other examples of extending a protocol to
bootstrap a p2mp BFD session can be found in the draft.
I've added a note in the first paragraph of Section 3.1.6 to clarify that
the use of the BFD Discriminator attribute is optional:
NEW TEXT:
   The P-tunnel status may be derived from the status of a multipoint
   BFD session [RFC8562] whose discriminator is advertised along with an
   x-PMSI A-D Route.  A P2MP BFD session can be instantiated using a
   mechanism other than the BFD Discriminator attribute, e.g., MPLS LSP
   Ping ([I-D.mirsky-mpls-p2mp-bfd]).  Description of these methods is
   outside the scope of this document.

>
>
>
> ...
> > > (2b) The fact that BFD monitoring can be achieved without the new
> > > attribute makes me think that the bootstrapping of BFD using BGP woul=
d
> be
> > > better served in a document produced by the BFD WG. One of the editor=
s
> has
> > > expressed the same opinion [1] [2]. Has a discussion taken place in t=
he
> > > BFD WG (or at least with the Chairs) about this work? Why was it not
> taken
> > > up there?
> > >
> > GIM>> Work on draft-mirsky-mpls-p2mp-bfd is progressing at MPLS WG.
> AFAIK,
> > it is in the state Candidate for WG Adoption. Moving the definition of
> the
> > BFD Discriminator attribute to that draft, as I understand, would requi=
re
> > using it as the normative reference. Comparing the current states of bo=
th
> > documents, would severely delay the publication of MVPN Fast Failover
> > specification and likely affect implementations of P-tunnel monitoring
> > mechanisms. I hope you can agree with the current organization of the
> > document.
>
> That doesn't address my question about whether this work should have
> been done in the BFD WG -- as you had suggested (links above).
>
> I'm sure you saw the message I sent to Reshad/Jeff on this topic.
> I'll rely on their and Martin's opinion.  BTW, I agree with Jeff in
> that bfd/idr should be given the opportunity to review this document.
>
GIM2>> I'm leaving this decision to the AD and Chairs of BESS and BFD WGs.

>
>
>
>
>
> > > ---------------------------------------------------------------------=
-
> > > COMMENT:
> > > ---------------------------------------------------------------------=
-
> ...
> > > (2) s/is an OPTIONAL procedure/is an optional procedure
> > > This is not a normative statement to require capitalization.
> >
> > GIM>> I think that the use of the normative form is reasonable. The
> sentence
> > can be re-worded using MAY. For example:
> > OLD TEXT:
> > The procedure described here is an OPTIONAL procedure that is based
> > on a downstream PE taking into account the status of P-tunnels rooted
> > at each possible Upstream PE, for including or not including each
> > given PE in the list of candidate UMHs for a given (C-S, C-G) state.
> > NEW TEXT:
> > The procedure described here MAY be used in a BGP/MPLS MVPN [RFC6513].
> It is
> > based on a downstream PE taking into account the status of P-tunnels
> rooted
> > at each possible Upstream PE, for including or not including each given
> PE
> > in the list of candidate UMHs for a given (C-S, C-G) state.
> >
> > We wanted to stress that without this mechanism BGP/MPLS MVPN, as
> defined in
> > RFCs 6513 and 6514, is fully functional and architecturally complete.
> This
> > draft discusses mechanisms that support the protection and faster
> > convergence in MVPN's control plane. And since these mechanisms only an
> > improvement compared to the BGP mechanisms, we wanted to emphasize that
> by
> > using the normative form. Would you agree?
>
> No, I don't.  Normative language was not meant for emphasis.  In any
> case, this is not a blocking comment.
>
GIM>> Switched to the lower case version of "optional"

>
>
>
>
> ...
> > > (4) =C2=A73.1.1: "similar to BGP next-hop tracking" Is this specified
> > > somewhere? I don't remember seeing a specification for next-hop
> tracking,
> > > but do know that implementations do it -- in an implementation-specif=
ic
> > > way. Please add a little more text about what is meant/expected.
> >
> > GIM>> Indeed, BGP next-hop tracking is internal to a system behavior th=
at
> > has not been, to the best of my knowledge, been documented at IETF or a=
ny
> > SDO. Would the following text provide reasonable context information:
> >
> > That is similar to BGP next-hop tracking for VPN routes, except that
> > the address considered is not the BGP next-hop address but the root
> > address in the x-PMSI Tunnel attribute. BGP next-hop tracking is a
> > feature that reduces the BGP convergence time comparing to the
> > "regular" BGP by monitoring BGP next-hop address changes in the
> > routing table. It's event-based because it detects changes in the
> > routing table. When it detects a change, it performs a next-hop scan
> > to find if any of the next hops in the BGP table is affected and update=
s
> > it accordingly.
>
> Suggestion:
>
> OLD>
>    BGP next-hop tracking is a feature that reduces the BGP convergence ti=
me
>    comparing to the "regular" BGP by monitoring BGP next-hop address
> changes
>    in the routing table. It's event-based because it detects changes in t=
he
>    routing table. When it detects a change, it performs a next-hop scan t=
o
>    find if any of the next hops in the BGP table is affected and updates =
it
>    accordingly.
>
> NEW>
>    BGP next-hop tracking monitors BGP next-hop address changes in the
> routing
>    table.  In general, when a change is detected, it performs a next-hop
> scan
>    to find if any of the next hops in the BGP table is affected and
> updates it
>    accordingly.>
>
GIM2>> Thank you for the proposed text. Accepted.

>
>
>
> ...
> > > (6) The "reachability condition" is mentioned in =C2=A73.1.1/=C2=A73.=
1.3/=C2=A73.1.4.
> > > Does this mean that that root tracking (=C2=A73.1.1) should be used w=
ith the
> > > other mechanisms? The specific text says that "the downstream PE can
> > > immediately update its UMH when the reachability condition changes",
> > > giving the impression that the combination is possible but not
> required.
> > >
> > > Note that =C2=A74.3 is titled "Reachability Determination", which I h=
oped
> would
> > > shed more light, but all it does is point back to =C2=A73.1.
> >
> > GIM>> I don't see any benefit of concurrently using more than one of th=
e
> > described in the document mechanisms that can monitor the state of a
> > P-tunnel. That is certainly possible but, in my opinion, would add
> > unnecessary complexity. The last paragraph in Section 3.1 is intended a=
s
> the
> > introduction to sub-sections that discuss different monitoring
> mechanisms:
> >
> > An implementation may support any combination of the methods
> > described in this section and provide a network operator with control
> > to choose which one to use in the particular deployment.
> > Would you suggest an update to this paragraph to clarify the statement?
>
> See the first DISCUSS point above.
>
> You didn't explicitly answer the question:  is the text in
> =C2=A73.1.1/=C2=A73.1.3/=C2=A73.1.4 an implication that root tracking sho=
uld be used
> with the other mechanisms?  If not, then that does it mean?
>
GIM2>> I hope that a new sub-section added in the response to the first
DISCUSS clarifies this question.

>
>
>
> ...
> > > (8) =C2=A73.1.2 mentions that "careful consideration and coordination=
" is
> > > needed when using other mechanisms such as rfc4090 "because
> uncorrelated
> > > timers might cause unnecessary switchovers and destabilize the
> network."
> > > What are the associated timers related to the mechanisms in this
> section?
> >
> > GIM>> This is in reference to the defect detection timers. When using
> > multi-layer protection particular consideration must be given to the
> > interaction of defect detections at different layers of a network. It s
> > recommended to use longer detection intervals at the higher layers. Som=
e
> > recommendations suggest using a multiplier of 3 or larger, e.g., 10 mse=
c
> > detection for FRR and at least 100 msec for e2e detection.
>
> Can you add something like that to the document?
>
GIM2>> I've used that text to update the last paragraph of Section 3.1.2:
NEW TEXT:
   Using this method when a fast restoration mechanism (such as MPLS FRR
   [RFC4090]) is in place for the link requires careful consideration
   and coordination of defect detection intervals for the link and the
   tunnel.  When using multi-layer protection, particular consideration
   must be given to the interaction of defect detections at different
   layers of a network.  It is recommended to use longer detection
   intervals at the higher layers.  Some recommendations suggest using a
   multiplier of 3 or larger, e.g., 10 msec detection for the link
   failure detection and at least 100 msec for the tunnel failure
   detection.  In many cases, it is not practical to use both protection
   methods at the same time because uncorrelated timers might cause
   unnecessary switchovers and destabilize the network.

>
>
>
> ...
> > > (10) =C2=A73.1.4: "An Upstream PE SHOULD be removed from the UMH cand=
idate
> > > list...if...the upstream one-hop branch of the tunnel from P to PE
> cannot be
> > > built." When is it ok to not remove the PE? IOW, why is this action n=
ot
> > > required?
> >
> > GIM>> Thank you for bringing this case. It was discussed during
> Shepherd's
> > review and we've asked for the expert's opinion. Jeffrey Zhang kindly
> > suggested the current text. (
> https://mailarchive.ietf.org/arch/browse/bess/?gbt=3D1&index=3DLxKYi9F6u1=
tl2qKtR2Q8wkQPMOA
> )
> > I'll check with him and get back with the answer.
>
> ok.
>
GIM2>> After the discussion, we've decided to make it the requirement,
i.e., s/SHOULD/MUST/

>
>
>
>
> ...
> > > (12) =C2=A73.1.5 says that "where this mechanism is used in conjuncti=
on with
> > > the method described in Section 5...downstream PEs can compare
> reception
> > > on the two P-tunnels to determine when one of them is down", but =C2=
=A75
> says
> > > that "downstream PEs accept traffic from the primary or standby tunne=
l,
> > > based on the status of the tunnel (based on Section 3)". IOW, =C2=A73=
.1.5
> > > points at =C2=A75 as providing a way to determine if a tunnel is down=
,
> while =C2=A75
> > > points back at =C2=A73 as the way to determine which tunnel to receiv=
e from.
> > > This pointing back and forth is not a total contradiction, but it
> needs to
> > > be clarified.
> >
> > GIM>> Though it might appear as a circular reference, it was not the
> > intention. An implementation of the method described in the last
> paragraph
> > of Section 3.1.5 can periodically accept traffic from primary and stand=
by
> > tunnels s the method of determining the state of the primary P-tunnel.
> I've
> > updated that paragraph to note that the comparison can be done
> periodically:
> >
> > OLD TEXT:
> > In cases where this mechanism is used in conjunction with the method
> > described in Section 5, no prior knowledge of the rate or maximum
> > inter-packet time on the multicast streams is required; downstream
> > PEs can compare actual packet reception statistics on the two
> > P-tunnels to determine when one of them is down. The detailed
> > specification of this mechanism is outside the scope of this
> > document.
> >
> > NEW TEXT:
> > In cases where this mechanism is used in conjunction with the method
> > described in Section 5, no prior knowledge of the rate or maximum
> > inter-packet time on the multicast streams is required; downstream
> > PEs can periodically compare actual packet reception statistics on
> > the two P-tunnels to determine when one of them is down. The
> > detailed specification of this mechanism is outside the scope of this
> > document.
>
> Let me try again.
>
> =C2=A73.1.5 says that the "PEs can compare reception on the two P-tunnels
> to determine when one of them is down".  OTOH, =C2=A75 says that the "PEs
> accept traffic from the primary or standby tunnel, based on the status
> of the tunnel".  The difference that I'm trying to point at is that =C2=
=A75
> says that traffic is accepted from only *one* tunnel ("primary *or*
> standby"), but =C2=A73.1.5 talks about receiving from *both*.
>
> Adding "periodically" doesn't help because the basic contradiction
> (receiving from one or both) is still there.
>
GIM2>> Thank you for further clarifying your point. I propose to update
that bullet point in Section 5 as follows:
   o  a policy controls downstream PEs from which tunnel to accept
      traffic.  For example, the policy could be based on the status of
      the tunnel or tunnel monitoring method (Section 3.1.5).

>
>
>
>
> > > (13) =C2=A73.1.6: "An implementation that does not recognize or is
> configured
> > > not to support this attribute MUST follow procedures defined for
> optional
> > > transitive path attributes in Section 5 of [RFC4271]."
> > >
> > > There cannot be a Normative action specified for a node that "does no=
t
> > > recognize...this attribute" because, by definition, it can't be assum=
ed
> > > that it is aware of this specification. In this case, it is not
> necessary
> > > to say anything about unrecognized attributes because that is already
> > > specified in rfc4271.
> > >
> > > For the "configured not to support this attribute" case, it should be
> > > pointed out that the node should operate as if the attribute was
> > > unrecognized.
> > >
> > > Suggestion>
> > > An implementation that is configured not to support this attribute MU=
ST
> > > follow the procedures defined in Section 5 of [RFC4271] as if the
> attribute
> > > was unrecognized.
> >
> > GIM>> Thank you for pointing this out. In the course of addressing
> comments
> > from other IESG reviewers, this text was updated to: This document
> defines
> > the format and ways of using a new BGP attribute called the "BFD
> > Discriminator". It is an optional transitive BGP attribute. Thus it is
> > expected that an implementation that does not recognize or is configure=
d
> not
> > to support this attribute follows procedures defined for optional
> transitive
> > path attributes in Section 5 of [RFC4271].
> > Would the current text address your concern?
>
> Mmmm...sure.
>
> rfc4271 doesn't talk about the case where a node is "configured not to
> support" an attribute.  The reason I suggested the specific link
> ("configured not to support this attribute...as if the attribute was
> unrecognized.") is that the behavior of ignoring (which may be an
> interpretation of "configured not to support") is different than if
> the attribute was unrecognized.  The text above doesn't make that link
> and, while some implementations may interpret it the way you meant it,
> others may not.
>
GIM2>> Thank you for the suggested clarification of the text. Hope the
updated text is clearer:
NEW TEXT:
   Thus it is expected that an implementation
   that does not recognize or is configured not to support this
   attribute, as if the attribute was unrecognized, follows procedures
   defined for optional transitive path attributes in Section 5 of
   [RFC4271].
>
>
>
>
>
> > > (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be considered
> malformed
> > > if its length is not a non-zero multiple of four." Ok, except that th=
e
> > > specification of the attribute doesn't mention the length (only the
> length
> > > of the TLVs). Please specify the length and any considerations relate=
d
> to
> > > the Extended Length bit. Also, given that this is a new attribute,
> with an
> > > unspecified potential number of TLVs, and that the length is apparent=
ly
> > > unbounded, all leading to the potential need for extended messages,
> please
> > > specify how to handle peers that cannot accommodate more than 4k octe=
t
> > > messages (rfc8654).
> >
> > GIM>> I've noticed a note from Jeff Hass. Would you agree with his
> opinion?
>
> Partially. ;-)
>
> He's right about the Extended Length bit.
>
>
> My reference to rfc8654 is because of this text from =C2=A75:
>
>    It is RECOMMENDED that BGP protocol developers and implementers are
>    conservative in their application and use of BGP Extended Messages.
>    Future protocol specifications MUST describe how to handle peers that
>    can only accommodate 4,096 octet messages.
>
> As I mentioned before, it concerns me that the attribute (while having
> a narrow use in this document) can have wider applicability.  The
> extensibility is significant by allowing sequential or nested TLVs.
> This combination may result in a large attribute, leading to large
> Updates, specially when considering other MVPN-related
> attribute/communities, etc.
>

> Considering the text in rfc8654, the question is: is the attribute
> necessary always, or can it be removed/omitted in some cases?  This is
> not an attribute that is necessary for route selection, for example.
> Given that rfc4271 says this:
>
>    If, due to the limits on the maximum size of an UPDATE message (see
>    Section 4), a single route doesn't fit into the message, the BGP
>    speaker MUST not advertise the route to its peers and MAY choose to
>    log an error locally.
>
> ...it may be possible that by not propagating the new attribute the
> size of the update will be reduced so that the advertisement can be
> made.  OTOH, if the attribute is removed then the tunnel can't be
> monitored.
>
> All I want is for you to consider any potential implications of the
> new attribute.  The conclusion may be that no further change is
> needed.
>
GIM2>> Thank you for further clarifying your comment. We are not defining
any extensions to the BFD Discriminator attribute and it may not be
possible to imagine all the potential extensions that could be proposed in
the future. It seems that it will be more appropriate to review the impact
of the specific extension of the BFD Discriminator attribute when it will
be proposed. At that time, we'll need to consider that excluding the BFD
Discriminator attribute from an update will be interpreted as the removal
of the corresponding p2mp BFD session. That would not cause a switchover
but just make MVPN failover to rely on the convergence of the BGP control
plane.

>
>
>
>
> ...
> > > (17) =C2=A73.1.6.1: "MUST use its IP address as the source IP  addres=
s"
> Which
> > > address? Please be specific.
> >
> > GIM>> Section 3.1.6.1 includes the list that an Upstream PE is required
> to
> > follow: To enable downstream PEs to track the P-tunnel status using a
> point-
> > to-multipoint (P2MP) BFD session the Upstream PE:
> > ....
> > o MUST use its IP address as the source IP address when transmitting
> > BFD Control packets;
> > Would adding the reference to the Upstream PE address your concern:
> > o MUST use its, i.e., the Upstream PE's, IP address as the source IP
> address
> > when transmitting BFD Control packets;
>
> No -- the question is which address of the Upstream PE?  I'm assuming
> that an upstream PE can have several addresses, which one is to be
> used?  I can guess it is the address of the interface used to reach
> the destination (or something like that)...but I would just want it to
> be clear.
>
GIM2>> Thank you, I now better understand the question. It it the PE
address in the given VRF. I propose the following update:
NEW TEXT:
    o  MUST use its PE address as the source IP address when transmitting
      BFD Control packets;
Also, I think that the text in the next section that defines the process on
a downstream PE needs clarification. I propose to update text as follows:
OLD TEXT:
   o  MUST use the source IP address of the BFD Control packet, the
      value of the BFD Discriminator field, and the x-PMSI Tunnel
      Identifier [RFC6514] the BFD Control packet was received on to
      properly demultiplex BFD sessions.
NEW TEXT:
   o  to properly demultiplex BFD session MUST use:

         the address of the PE that included the BFD Discriminator
         attribute in the x-PMSI A-D Route;

         the value of the BFD Discriminator field in the BFD
         Discriminator attribute;

         the x-PMSI Tunnel Identifier [RFC6514] the BFD Control packet
         was received on.

>
>
>
>
> > > (18) =C2=A73.1.6.2: If the IP address doesn't map correctly at the
> downstream
> > > PE (for example, a different local address is used that doesn't
> correspond
> > > to the information in the PMSI attribute), what action should it take=
?
> Can
> > > the tunnel still be monitored?
> >
> > GIM>> There's a possibility that the same downstream PE is monitoring
> more
> > than one P-tunnel. Since each Upstream PE assigns its own BFD
> Discriminator,
> > there's a chance that the same value is picked by more than one Upstrea=
m
> PE.
> > According to Section 5.7 of the RFC 8562:
> > IP and MPLS multipoint tails MUST demultiplex BFD packets based on a
> > combination of the source address, My Discriminator, and the identity
> > of the multipoint path that the multipoint BFD Control packet was
> > received from. Together they uniquely identify the head of the
> > multipoint path.
> >
> > We may consider adding the source address in the BFD Discriminator
> attribute
> > as an optional TLV. I think that might be a good extension that can be
> > introduced in a new document.
>
> Why wait for a new document?  You made a pretty good case for
> signaling the source address.
>
GIM2>> I'd like to defer this question to our AD and BESS WG Chairs.

>
>
>
> ...
> > > (22) =C2=A74: "Such behavior is referred to as "revertive" behavior a=
nd
> MUST be
> > > supported." The text around this sentence seems to indicate that the
> > > revertive behavior is the default, is that the intent? Or if the inte=
nt
> > > for it just to be supported (as written)? Please be clear.
> >
> > GIM>> This part of the document has been updated in the course of
> addressing
> > IESG comments:
> > Such behavior is referred to as "revertive" behavior and MUST be
> supported.
> > Non-revertive behavior refers to the behavior of continuing to select t=
he
> > backup PE as the UMH even after the Primary has come up. This
> non-revertive
> > behavior MAY also be supported by an implementation and would be enable=
d
> > through some configuration. Selection of the behavior, revertive or
> > non-revertive, is an operational issue, but it MUST be consistent on al=
l
> PEs
> > in the given MVPN.
> >
> > Do you find the updated text clear enough?
>
> Yes.  But it now brings up a new question: can you provide operational
> guidance on the selection of this behavior?
>
GIM2>> I think that the decision to prefer revertive behavior is based on
the resource allocation model for primary and standby P-tunnels. In cases
where the switchover to the standby tunnel does not affect other services
and provides the required quality of service, an operator might use
non-revertive behavior to avoid unnecessary in such case switchover and
thus minimize disruption to the multicast service. I'd propose that be
added as follows:
NEW TEXT:
While revertive is considered the default
   behavior, there might be cases where the switchover to the standby
   tunnel does not affect other services and provides the required
   quality of service.  An operator might use non-revertive behavior to
   avoid unnecessary in such case switchover and thus minimize
   disruption to the multicast service.

>
>
>
> > > (23) =C2=A74.1: "...routes that carry the "Standby PE" BGP Community =
MUST
> have
> > > the LOCAL_PREF attribute set to zero." What should a receiver do if t=
he
> > > LOCAL_PREF is not zero?
> >
> > GIM>> I believe that the preceding text describes the situation when th=
e
> > LOCAL_PREF !=3D 0:
> > ... two different downstream PEs
> > consider different Upstream PEs to be the primary one. In that case,
> > without any precaution taken, both Upstream PEs would process a
> > standby C-multicast route and possibly stop forwarding at the same
> > time.
>
> No, it doesn't.  The text specifies that the update "MUST have the
> LOCAL_PREF attribute set to zero".  The question is not about the
> potential effect, but about the value being anything else (> 0).  Note
> that the value can be low enough (> 0) and no adverse effect may take
> place, but the text doesn't specify a "low value", it explicitly
> specifies 0.
>
GIM2>> I think I see it better now. Would the following text work:
NEW TEXT:
   For this purpose, routes that carry the Standby PE BGP
   Community MUST have the LOCAL_PREF attribute set to the value lower
   than the value specified as the LOCAL_PREF attribute for the route
   that does not carry the Standby PE BGP Community.  The value of zero
   is RECOMMENDED.
Also, the text regarding setting the LOCAL_PREF after the switchover may
need, in my view, the update to not require it is set to zero:
NEW TEXT:
   The new Upstream PE MUST set the LOCAL_PREF attribute
   for that C-multicast route to the same value as when the Standby PE
   BGP Community was included in the advertisement.


>
>
>
> > > (24) =C2=A74.1: In the last paragraph of this section, if I follow
> correctly,
> > > the text talks about the case where the standby becomes the primary a=
nd
> > > the updated advertisement doesn't have the Standby PE community. If
> that
> > > is correct, then s/ presence/absence of the Standby PE BGP Community/
> > > absence of the Standby PE BGP Community
> > >
> > > Also, the last sentence says that the "LOCAL_PREF attribute MUST be
> set to
> > > zero". If the community is not present, how can a receiver enforce
> this?
> > > What action should it take if the LOCAL_PREF has a different value?
> >
> > GIM>> Thank you for the suggestion, it clarifies the text. As I
> understand,
> > the requirement is for the Standby Upstream PE, not for a downstream PE=
.
> Would
> > the following update make that clearer:
> > OLD TEXT:
> > The LOCAL_PREF attribute MUST be set to zero.
> > NEW TEXT:
> > The new Upstream PE MUST set the LOCAL_PREF attribute to
> > zero for that C-multicast route.
>
> I don't know what the difference in the meaning is. :-(
>
> There are three parts to my question:
>
> (1) If the community is not present, then this would be a "normal"
> Update.  How does the receiver know the difference so it can enforce
> the "MUST"?
>
> (2) What should the receiver do if the value is not as specified?
>
> (3) Given that the LOCAL_PREF for Updates *with* the community MUST be
> 0, what's the use of sending Updates *without* the community with the
> same value?
>
GIM2>> Had the change above addressed this comment?

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Alvaro,<div>thank you for giving me mo=
re details to work with. Please find my notes and the new proposed updates =
in-line below under the GIM2&gt;&gt; tag. Attached is the diff that highlig=
hts changes related to your DISCUSS and COMMENT.</div><div><br></div><div>R=
egards,</div><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Mon, Dec 21, 2020 at 12:01 PM Alvaro Retan=
a &lt;<a href=3D"mailto:aretana.ietf@gmail.com">aretana.ietf@gmail.com</a>&=
gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On De=
cember 20, 2020 at 7:24:34 PM, Greg Mirsky wrote:<br>
<br>
Greg:<br>
<br>
Hi!<br>
<br>
I&#39;m leaving in only the parts where we don&#39;t agree or where I have =
commments.<br>
<br>
Thanks!<br>
<br>
Alvaro.<br>
<br>
<br>
...<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt; DISCUSS:<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt;<br>
&gt; &gt; (1) This document describes several methods to determine the stat=
us of a<br>
&gt; &gt; tunnel (in =C2=A73), none of which &quot;provide a &quot;fast fai=
lover&quot; solution when<br>
&gt; &gt; used alone, but can be used together with the mechanism described=
 in<br>
&gt; &gt; Section 4&quot; (=C2=A71). =C2=A73 also says this:<br>
&gt; &gt;<br>
&gt; &gt; An implementation may support any combination of the methods<br>
&gt; &gt; described in this section and provide a network operator with con=
trol<br>
&gt; &gt; to choose which one to use in the particular deployment.<br>
&gt; &gt;<br>
&gt; &gt; While =C2=A73.1 is clear in the fact that it is not a requirement=
 for all<br>
&gt; &gt; downstream PEs to use the same mechanism, there are no guidelines=
 to aid<br>
&gt; &gt; the operator to chose which mechanism to use. Some cases may be o=
bvious<br>
&gt; &gt; (e.g. =C2=A73.1.3 applies to tunnels of a specific type), but oth=
ers are not.<br>
&gt; &gt; I would like to see deployment considerations related to the adva=
ntages/<br>
&gt; &gt; disadvantages that each method may have in specific situations (i=
ncluding<br>
&gt; &gt; their possible combination).<br>
&gt;<br>
&gt; GIM&gt;&gt; I think it might be not that simple to compare deployment =
challenges<br>
&gt; and benefits resulting from the deployment of different P-tunnel monit=
oring<br>
&gt; methods because we have to somehow abstract from an impact of choices =
made<br>
&gt; by respective implementations. Also, there probably should be a refere=
nce<br>
&gt; environment, a use case we agree with. I agree that such a comparative=
<br>
&gt; analysis of P-tunnel monitoring methods is useful it doesn&#39;t seem =
to benefit<br>
&gt; this document as the choice of a developer which ones to implement and=
 an<br>
&gt; operator which one to use don&#39;t affect the functionality discussed=
 in the<br>
&gt; draft. Would you agree?<br>
<br>
No, I don&#39;t.=C2=A0 That&#39;s the reason for this DISCUSS point. :-)<br=
>
<br>
Why is this document specifying multiple mechanisms?=C2=A0 Why not specify<=
br>
just one?=C2=A0 At a high level, I assume the answer is that one size<br>
doesn&#39;t fit all, and that specific deployments might benefit from<br>
specific mechanisms while others may not be as useful. =C2=A0 I don&#39;t t=
hink<br>
that to provide guidance (I&#39;m not asking for in-depth analysis) there<b=
r>
needs to be a priori agreement on use cases, etc...beyond what the WG<br>
has already been considering for the development of this document.<br>
<br>
Your initial statement that &quot;it might be not that simple to compare&qu=
ot;<br>
is precisely the reason I think that operational guidance is needed.<br></b=
lockquote><div>GIM2&gt;&gt; I propose a new sub-section to summarize the be=
nefits and challenges of methods described in Section 3.1:</div>3.1.8.=C2=
=A0 Operational Considerations for Monitoring P-Tunnel&#39;s Status<br><br>=
=C2=A0 =C2=A0Several methods to monitor the status of a P-tunnel are descri=
bed in<br>=C2=A0 =C2=A0Section 3.1.=C2=A0 Though there might be no perfect =
method, a comparison<br>=C2=A0 =C2=A0of benefits and challenges of each tec=
hnique could be helpful to both<br>=C2=A0 =C2=A0implementors and network op=
erators.<br><br>=C2=A0 =C2=A0Tracking the root of an MVPN (Section 3.1.1) c=
oncludes about the<br>=C2=A0 =C2=A0status of a P-tunnel based on the contro=
l plane information.<br>=C2=A0 =C2=A0Because, in general, the MPLS data pla=
ne is not fate-sharing with the<br>=C2=A0 =C2=A0control plane, this method =
might produce false positive or false<br>=C2=A0 =C2=A0negative alarms.=C2=
=A0 On the other hand, because BGP next-hop tracking is<br>=C2=A0 =C2=A0bro=
adly supported and deployed, this method might be the easiest to<br>=C2=A0 =
=C2=A0deploy.<br><br>=C2=A0 =C2=A0Method described in Section 3.1.2 monitor=
s the state of the data<br>=C2=A0 =C2=A0plane but only for an egress P-PE l=
ink of a P-tunnel.=C2=A0 As a result,<br>=C2=A0 =C2=A0network failures that=
 affect upstream links might not be detected<br>=C2=A0 =C2=A0using this met=
hod and the MVPN convergence would be determined by the<br>=C2=A0 =C2=A0con=
vergence of the BGP control plane.<br><br>=C2=A0 =C2=A0Using the state chan=
ge of a P2MP RSVP-TE LSP as the trigger to re-<br>=C2=A0 =C2=A0evaluate the=
 status of the P-tunnel (Section 3.1.3) relies on the<br>=C2=A0 =C2=A0mecha=
nism used to monitor the state of the P2MP LSP.<br><br>=C2=A0 =C2=A0The met=
hod described in Section 3.1.4 is simple and prone to false<br>=C2=A0 =C2=
=A0alarms but it is applicable to a sub-set of MVPNs, those that use the<br=
>=C2=A0 =C2=A0leaf-triggered x-PMSI tunnels.<br><br>=C2=A0 =C2=A0Though som=
e MVPN might be used to provide a multicast service with<br>=C2=A0 =C2=A0pr=
edictable interpacket interval (Section 3.1.5), the number of such<br>=C2=
=A0 =C2=A0cases seem limited.<br><br>=C2=A0 =C2=A0Monitoring the status of =
a P-tunnel using p2mp BFD session<br>=C2=A0 =C2=A0(Section 3.1.6) may produ=
ce the most accurate and expedient failure<br>=C2=A0 =C2=A0notification of =
all monitoring methods discussed.=C2=A0 On the other hand,<br>=C2=A0 =C2=A0=
it requires careful consideration of the additional load of BFD onto<br><di=
v>=C2=A0 =C2=A0network and PE nodes.=C2=A0</div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex">
<br>
<br>
<br>
&gt; &gt; (2) The BFD Discriminator Attribute has a very narrow application=
 in this<br>
&gt; &gt; document when compared to the potential other uses given the exte=
nsibility<br>
&gt; &gt; possibilities related to bootstrapping BFD. I have serious concer=
ns about<br>
&gt; &gt; the attribute being defined in this document, amongst a series of=
 other<br>
&gt; &gt; mechanisms.<br>
&gt; &gt;<br>
&gt; &gt; (2a) The tunnel can be monitored without the new BGP Attribute (a=
ssuming<br>
&gt; &gt; proper configuration of course). Why is that option is not even m=
entioned<br>
&gt; &gt; in the document?<br>
&gt;<br>
&gt; GIM&gt;&gt; You are right, there could be other methods to bootstrap a=
 p2mp BFD<br>
&gt; session. But since RFC 8562 has no discussion of bootstrapping a sessi=
on,<br>
&gt; having it in this draft seemed somewhat out of place. We can add an<br=
>
&gt; informational reference to Section 4 of draft-mirsky-mpls-p2mp-bfd<br>
&gt; (<a href=3D"https://datatracker.ietf.org/doc/draft-mirsky-mpls-p2mp-bf=
d/)where" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org=
/doc/draft-mirsky-mpls-p2mp-bfd/)where</a> several<br>
&gt; bootstrapping options discussed. Would that be acceptable?<br>
<br>
No, but thanks for pointing at that other draft which supports the<br>
fact that the attribute is not the only way to bootstrap the session.<br>
<br>
My point here is that you don&#39;t need the attribute for BFD to be an<br>
useful tool.=C2=A0 However, the description of the tool (monitoring) is<br>
tied to the attribute (including the point below about deleting the<br>
BFD session).=C2=A0 It doesn&#39;t have to be: the use of BFD should be<br>
independent of the bootstrapping mechanism.<br>
<br>
Do you consider other possible ways of bootstrapping the session<br>
valid?=C2=A0 Would it be ok to use them to enable the use of BFD?=C2=A0 Can=
 a<br>
BFD session that is setup using a different mechanism used to monitor<br>
the tunnel?<br></blockquote><div><br></div><div>GIM2&gt;&gt; Thank you for =
clarifying the question. Yes, a p2mp BFD session can be instantiated using =
some other than the BFD Discriminator attribute method. draft-mirsky-mpls-p=
2mp-bfd gives several options and describes how MPLS LSP Ping can be used. =
But that method, in my opinion, has some operational issues and is less pre=
ferable=C2=A0compared to using an extension of a control plane protocol. Ot=
her examples of extending a protocol to bootstrap a p2mp BFD session can be=
 found in the draft.</div><div>I&#39;ve added a note in the first paragraph=
 of Section 3.1.6 to clarify that the use of the BFD Discriminator attribut=
e is optional:</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0The P-tunnel stat=
us may be derived from the status of a multipoint<br>=C2=A0 =C2=A0BFD sessi=
on [RFC8562] whose discriminator is advertised along with an<br>=C2=A0 =C2=
=A0x-PMSI A-D Route.=C2=A0 A P2MP BFD session can be instantiated using a<b=
r>=C2=A0 =C2=A0mechanism other than the BFD Discriminator attribute, e.g., =
MPLS LSP<br>=C2=A0 =C2=A0Ping ([I-D.mirsky-mpls-p2mp-bfd]).=C2=A0 Descripti=
on of these methods is<br>=C2=A0 =C2=A0outside the scope of this document.<=
br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
...<br>
&gt; &gt; (2b) The fact that BFD monitoring can be achieved without the new=
<br>
&gt; &gt; attribute makes me think that the bootstrapping of BFD using BGP =
would be<br>
&gt; &gt; better served in a document produced by the BFD WG. One of the ed=
itors has<br>
&gt; &gt; expressed the same opinion [1] [2]. Has a discussion taken place =
in the<br>
&gt; &gt; BFD WG (or at least with the Chairs) about this work? Why was it =
not taken<br>
&gt; &gt; up there?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; Work on draft-mirsky-mpls-p2mp-bfd is progressing at MPLS =
WG. AFAIK,<br>
&gt; it is in the state Candidate for WG Adoption. Moving the definition of=
 the<br>
&gt; BFD Discriminator attribute to that draft, as I understand, would requ=
ire<br>
&gt; using it as the normative reference. Comparing the current states of b=
oth<br>
&gt; documents, would severely delay the publication of MVPN Fast Failover<=
br>
&gt; specification and likely affect implementations of P-tunnel monitoring=
<br>
&gt; mechanisms. I hope you can agree with the current organization of the<=
br>
&gt; document.<br>
<br>
That doesn&#39;t address my question about whether this work should have<br=
>
been done in the BFD WG -- as you had suggested (links above).<br>
<br>
I&#39;m sure you saw the message I sent to Reshad/Jeff on this topic.<br>
I&#39;ll rely on their and Martin&#39;s opinion.=C2=A0 BTW, I agree with Je=
ff in<br>
that bfd/idr should be given the opportunity to review this document.<br></=
blockquote><div>GIM2&gt;&gt; I&#39;m leaving this decision to the AD and Ch=
airs of BESS and BFD WGs.</div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left=
:1ex">
<br>
<br>
<br>
<br>
<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
&gt; &gt; COMMENT:<br>
&gt; &gt; -----------------------------------------------------------------=
-----<br>
...<br>
&gt; &gt; (2) s/is an OPTIONAL procedure/is an optional procedure<br>
&gt; &gt; This is not a normative statement to require capitalization.<br>
&gt;<br>
&gt; GIM&gt;&gt; I think that the use of the normative form is reasonable. =
The sentence<br>
&gt; can be re-worded using MAY. For example:<br>
&gt; OLD TEXT:<br>
&gt; The procedure described here is an OPTIONAL procedure that is based<br=
>
&gt; on a downstream PE taking into account the status of P-tunnels rooted<=
br>
&gt; at each possible Upstream PE, for including or not including each<br>
&gt; given PE in the list of candidate UMHs for a given (C-S, C-G) state.<b=
r>
&gt; NEW TEXT:<br>
&gt; The procedure described here MAY be used in a BGP/MPLS MVPN [RFC6513].=
 It is<br>
&gt; based on a downstream PE taking into account the status of P-tunnels r=
ooted<br>
&gt; at each possible Upstream PE, for including or not including each give=
n PE<br>
&gt; in the list of candidate UMHs for a given (C-S, C-G) state.<br>
&gt;<br>
&gt; We wanted to stress that without this mechanism BGP/MPLS MVPN, as defi=
ned in<br>
&gt; RFCs 6513 and 6514, is fully functional and architecturally complete. =
This<br>
&gt; draft discusses mechanisms that support the protection and faster<br>
&gt; convergence in MVPN&#39;s control plane. And since these mechanisms on=
ly an<br>
&gt; improvement compared to the BGP mechanisms, we wanted to emphasize tha=
t by<br>
&gt; using the normative form. Would you agree?<br>
<br>
No, I don&#39;t.=C2=A0 Normative language was not meant for emphasis.=C2=A0=
 In any<br>
case, this is not a blocking comment.<br></blockquote><div>GIM&gt;&gt; Swit=
ched to the lower case version of &quot;optional&quot;=C2=A0</div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
<br>
...<br>
&gt; &gt; (4) =C2=A73.1.1: &quot;similar to BGP next-hop tracking&quot; Is =
this specified<br>
&gt; &gt; somewhere? I don&#39;t remember seeing a specification for next-h=
op tracking,<br>
&gt; &gt; but do know that implementations do it -- in an implementation-sp=
ecific<br>
&gt; &gt; way. Please add a little more text about what is meant/expected.<=
br>
&gt;<br>
&gt; GIM&gt;&gt; Indeed, BGP next-hop tracking is internal to a system beha=
vior that<br>
&gt; has not been, to the best of my knowledge, been documented at IETF or =
any<br>
&gt; SDO. Would the following text provide reasonable context information:<=
br>
&gt;<br>
&gt; That is similar to BGP next-hop tracking for VPN routes, except that<b=
r>
&gt; the address considered is not the BGP next-hop address but the root<br=
>
&gt; address in the x-PMSI Tunnel attribute. BGP next-hop tracking is a<br>
&gt; feature that reduces the BGP convergence time comparing to the<br>
&gt; &quot;regular&quot; BGP by monitoring BGP next-hop address changes in =
the<br>
&gt; routing table. It&#39;s event-based because it detects changes in the<=
br>
&gt; routing table. When it detects a change, it performs a next-hop scan<b=
r>
&gt; to find if any of the next hops in the BGP table is affected and updat=
es<br>
&gt; it accordingly.<br>
<br>
Suggestion:<br>
<br>
OLD&gt;<br>
=C2=A0 =C2=A0BGP next-hop tracking is a feature that reduces the BGP conver=
gence time<br>
=C2=A0 =C2=A0comparing to the &quot;regular&quot; BGP by monitoring BGP nex=
t-hop address changes<br>
=C2=A0 =C2=A0in the routing table. It&#39;s event-based because it detects =
changes in the<br>
=C2=A0 =C2=A0routing table. When it detects a change, it performs a next-ho=
p scan to<br>
=C2=A0 =C2=A0find if any of the next hops in the BGP table is affected and =
updates it<br>
=C2=A0 =C2=A0accordingly.<br>
<br>
NEW&gt;<br>
=C2=A0 =C2=A0BGP next-hop tracking monitors BGP next-hop address changes in=
 the routing<br>
=C2=A0 =C2=A0table.=C2=A0 In general, when a change is detected, it perform=
s a next-hop scan<br>
=C2=A0 =C2=A0to find if any of the next hops in the BGP table is affected a=
nd updates it<br>
=C2=A0 =C2=A0accordingly.&gt;<br></blockquote><div>GIM2&gt;&gt; Thank you f=
or the proposed text. Accepted.=C2=A0</div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex">
<br>
<br>
<br>
...<br>
&gt; &gt; (6) The &quot;reachability condition&quot; is mentioned in =C2=A7=
3.1.1/=C2=A73.1.3/=C2=A73.1.4.<br>
&gt; &gt; Does this mean that that root tracking (=C2=A73.1.1) should be us=
ed with the<br>
&gt; &gt; other mechanisms? The specific text says that &quot;the downstrea=
m PE can<br>
&gt; &gt; immediately update its UMH when the reachability condition change=
s&quot;,<br>
&gt; &gt; giving the impression that the combination is possible but not re=
quired.<br>
&gt; &gt;<br>
&gt; &gt; Note that =C2=A74.3 is titled &quot;Reachability Determination&qu=
ot;, which I hoped would<br>
&gt; &gt; shed more light, but all it does is point back to =C2=A73.1.<br>
&gt;<br>
&gt; GIM&gt;&gt; I don&#39;t see any benefit of concurrently using more tha=
n one of the<br>
&gt; described in the document mechanisms that can monitor the state of a<b=
r>
&gt; P-tunnel. That is certainly possible but, in my opinion, would add<br>
&gt; unnecessary complexity. The last paragraph in Section 3.1 is intended =
as the<br>
&gt; introduction to sub-sections that discuss different monitoring mechani=
sms:<br>
&gt;<br>
&gt; An implementation may support any combination of the methods<br>
&gt; described in this section and provide a network operator with control<=
br>
&gt; to choose which one to use in the particular deployment.<br>
&gt; Would you suggest an update to this paragraph to clarify the statement=
?<br>
<br>
See the first DISCUSS point above.<br>
<br>
You didn&#39;t explicitly answer the question: =C2=A0is the text in<br>
=C2=A73.1.1/=C2=A73.1.3/=C2=A73.1.4 an implication that root tracking shoul=
d be used<br>
with the other mechanisms?=C2=A0 If not, then that does it mean?<br></block=
quote><div>GIM2&gt;&gt; I hope that a new sub-section added in the response=
 to the first DISCUSS clarifies this question.</div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">
<br>
<br>
<br>
...<br>
&gt; &gt; (8) =C2=A73.1.2 mentions that &quot;careful consideration and coo=
rdination&quot; is<br>
&gt; &gt; needed when using other mechanisms such as rfc4090 &quot;because =
uncorrelated<br>
&gt; &gt; timers might cause unnecessary switchovers and destabilize the ne=
twork.&quot;<br>
&gt; &gt; What are the associated timers related to the mechanisms in this =
section?<br>
&gt;<br>
&gt; GIM&gt;&gt; This is in reference to the defect detection timers. When =
using<br>
&gt; multi-layer protection particular consideration must be given to the<b=
r>
&gt; interaction of defect detections at different layers of a network. It =
s<br>
&gt; recommended to use longer detection intervals at the higher layers. So=
me<br>
&gt; recommendations suggest using a multiplier of 3 or larger, e.g., 10 ms=
ec<br>
&gt; detection for FRR and at least 100 msec for e2e detection.<br>
<br>
Can you add something like that to the document?<br></blockquote><div>GIM2&=
gt;&gt; I&#39;ve used that text to update the last paragraph of Section 3.1=
.2:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0Using this method when a fast res=
toration mechanism (such as MPLS FRR<br>=C2=A0 =C2=A0[RFC4090]) is in place=
 for the link requires careful consideration<br>=C2=A0 =C2=A0and coordinati=
on of defect detection intervals for the link and the<br>=C2=A0 =C2=A0tunne=
l.=C2=A0 When using multi-layer protection, particular consideration<br>=C2=
=A0 =C2=A0must be given to the interaction of defect detections at differen=
t<br>=C2=A0 =C2=A0layers of a network.=C2=A0 It is recommended to use longe=
r detection<br>=C2=A0 =C2=A0intervals at the higher layers.=C2=A0 Some reco=
mmendations suggest using a<br>=C2=A0 =C2=A0multiplier of 3 or larger, e.g.=
, 10 msec detection for the link<br>=C2=A0 =C2=A0failure detection and at l=
east 100 msec for the tunnel failure<br>=C2=A0 =C2=A0detection.=C2=A0 In ma=
ny cases, it is not practical to use both protection<br>=C2=A0 =C2=A0method=
s at the same time because uncorrelated timers might cause<br><div>=C2=A0 =
=C2=A0unnecessary switchovers and destabilize the network.=C2=A0</div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
...<br>
&gt; &gt; (10) =C2=A73.1.4: &quot;An Upstream PE SHOULD be removed from the=
 UMH candidate<br>
&gt; &gt; list...if...the upstream one-hop branch of the tunnel from P to P=
E cannot be<br>
&gt; &gt; built.&quot; When is it ok to not remove the PE? IOW, why is this=
 action not<br>
&gt; &gt; required?<br>
&gt;<br>
&gt; GIM&gt;&gt; Thank you for bringing this case. It was discussed during =
Shepherd&#39;s<br>
&gt; review and we&#39;ve asked for the expert&#39;s opinion. Jeffrey Zhang=
 kindly<br>
&gt; suggested the current text. (<a href=3D"https://mailarchive.ietf.org/a=
rch/browse/bess/?gbt=3D1&amp;index=3DLxKYi9F6u1tl2qKtR2Q8wkQPMOA" rel=3D"no=
referrer" target=3D"_blank">https://mailarchive.ietf.org/arch/browse/bess/?=
gbt=3D1&amp;index=3DLxKYi9F6u1tl2qKtR2Q8wkQPMOA</a>)<br>
&gt; I&#39;ll check with him and get back with the answer.<br>
<br>
ok.<br></blockquote><div>GIM2&gt;&gt; After the discussion, we&#39;ve decid=
ed to make it the requirement, i.e., s/SHOULD/MUST/=C2=A0</div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
<br>
...<br>
&gt; &gt; (12) =C2=A73.1.5 says that &quot;where this mechanism is used in =
conjunction with<br>
&gt; &gt; the method described in Section 5...downstream PEs can compare re=
ception<br>
&gt; &gt; on the two P-tunnels to determine when one of them is down&quot;,=
 but =C2=A75 says<br>
&gt; &gt; that &quot;downstream PEs accept traffic from the primary or stan=
dby tunnel,<br>
&gt; &gt; based on the status of the tunnel (based on Section 3)&quot;. IOW=
, =C2=A73.1.5<br>
&gt; &gt; points at =C2=A75 as providing a way to determine if a tunnel is =
down, while =C2=A75<br>
&gt; &gt; points back at =C2=A73 as the way to determine which tunnel to re=
ceive from.<br>
&gt; &gt; This pointing back and forth is not a total contradiction, but it=
 needs to<br>
&gt; &gt; be clarified.<br>
&gt;<br>
&gt; GIM&gt;&gt; Though it might appear as a circular reference, it was not=
 the<br>
&gt; intention. An implementation of the method described in the last parag=
raph<br>
&gt; of Section 3.1.5 can periodically accept traffic from primary and stan=
dby<br>
&gt; tunnels s the method of determining the state of the primary P-tunnel.=
 I&#39;ve<br>
&gt; updated that paragraph to note that the comparison can be done periodi=
cally:<br>
&gt;<br>
&gt; OLD TEXT:<br>
&gt; In cases where this mechanism is used in conjunction with the method<b=
r>
&gt; described in Section 5, no prior knowledge of the rate or maximum<br>
&gt; inter-packet time on the multicast streams is required; downstream<br>
&gt; PEs can compare actual packet reception statistics on the two<br>
&gt; P-tunnels to determine when one of them is down. The detailed<br>
&gt; specification of this mechanism is outside the scope of this<br>
&gt; document.<br>
&gt;<br>
&gt; NEW TEXT:<br>
&gt; In cases where this mechanism is used in conjunction with the method<b=
r>
&gt; described in Section 5, no prior knowledge of the rate or maximum<br>
&gt; inter-packet time on the multicast streams is required; downstream<br>
&gt; PEs can periodically compare actual packet reception statistics on<br>
&gt; the two P-tunnels to determine when one of them is down. The<br>
&gt; detailed specification of this mechanism is outside the scope of this<=
br>
&gt; document.<br>
<br>
Let me try again.<br>
<br>
=C2=A73.1.5 says that the &quot;PEs can compare reception on the two P-tunn=
els<br>
to determine when one of them is down&quot;.=C2=A0 OTOH, =C2=A75 says that =
the &quot;PEs<br>
accept traffic from the primary or standby tunnel, based on the status<br>
of the tunnel&quot;.=C2=A0 The difference that I&#39;m trying to point at i=
s that =C2=A75<br>
says that traffic is accepted from only *one* tunnel (&quot;primary *or*<br=
>
standby&quot;), but =C2=A73.1.5 talks about receiving from *both*.<br>
<br>
Adding &quot;periodically&quot; doesn&#39;t help because the basic contradi=
ction<br>
(receiving from one or both) is still there.<br></blockquote><div>GIM2&gt;&=
gt; Thank you for further clarifying your point. I propose to update that b=
ullet point in Section 5 as follows:</div>=C2=A0 =C2=A0o =C2=A0a policy con=
trols downstream PEs from which tunnel to accept<br>=C2=A0 =C2=A0 =C2=A0 tr=
affic.=C2=A0 For example, the policy could be based on the status of<br><di=
v>=C2=A0 =C2=A0 =C2=A0 the tunnel or tunnel monitoring method (Section 3.1.=
5).=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
<br>
&gt; &gt; (13) =C2=A73.1.6: &quot;An implementation that does not recognize=
 or is configured<br>
&gt; &gt; not to support this attribute MUST follow procedures defined for =
optional<br>
&gt; &gt; transitive path attributes in Section 5 of [RFC4271].&quot;<br>
&gt; &gt;<br>
&gt; &gt; There cannot be a Normative action specified for a node that &quo=
t;does not<br>
&gt; &gt; recognize...this attribute&quot; because, by definition, it can&#=
39;t be assumed<br>
&gt; &gt; that it is aware of this specification. In this case, it is not n=
ecessary<br>
&gt; &gt; to say anything about unrecognized attributes because that is alr=
eady<br>
&gt; &gt; specified in rfc4271.<br>
&gt; &gt;<br>
&gt; &gt; For the &quot;configured not to support this attribute&quot; case=
, it should be<br>
&gt; &gt; pointed out that the node should operate as if the attribute was<=
br>
&gt; &gt; unrecognized.<br>
&gt; &gt;<br>
&gt; &gt; Suggestion&gt;<br>
&gt; &gt; An implementation that is configured not to support this attribut=
e MUST<br>
&gt; &gt; follow the procedures defined in Section 5 of [RFC4271] as if the=
 attribute<br>
&gt; &gt; was unrecognized.<br>
&gt;<br>
&gt; GIM&gt;&gt; Thank you for pointing this out. In the course of addressi=
ng comments<br>
&gt; from other IESG reviewers, this text was updated to: This document def=
ines<br>
&gt; the format and ways of using a new BGP attribute called the &quot;BFD<=
br>
&gt; Discriminator&quot;. It is an optional transitive BGP attribute. Thus =
it is<br>
&gt; expected that an implementation that does not recognize or is configur=
ed not<br>
&gt; to support this attribute follows procedures defined for optional tran=
sitive<br>
&gt; path attributes in Section 5 of [RFC4271].<br>
&gt; Would the current text address your concern?<br>
<br>
Mmmm...sure.<br>
<br>
rfc4271 doesn&#39;t talk about the case where a node is &quot;configured no=
t to<br>
support&quot; an attribute.=C2=A0 The reason I suggested the specific link<=
br>
(&quot;configured not to support this attribute...as if the attribute was<b=
r>
unrecognized.&quot;) is that the behavior of ignoring (which may be an<br>
interpretation of &quot;configured not to support&quot;) is different than =
if<br>
the attribute was unrecognized.=C2=A0 The text above doesn&#39;t make that =
link<br>
and, while some implementations may interpret it the way you meant it,<br>
others may not.<br></blockquote><div>GIM2&gt;&gt; Thank you for the suggest=
ed clarification of the text. Hope the updated text is clearer:</div><div>N=
EW TEXT:</div><div>=C2=A0 =C2=A0Thus it is expected that an implementation<=
/div>=C2=A0 =C2=A0that does not recognize or is configured not to support t=
his<br>=C2=A0 =C2=A0attribute, as if the attribute was unrecognized, follow=
s procedures<br>=C2=A0 =C2=A0defined for optional transitive path attribute=
s in Section 5 of<br>=C2=A0 =C2=A0[RFC4271].<blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">
<br>
<br>
<br>
<br>
&gt; &gt; (15) =C2=A73.1.6: &quot;The BFD Discriminator attribute MUST be c=
onsidered malformed<br>
&gt; &gt; if its length is not a non-zero multiple of four.&quot; Ok, excep=
t that the<br>
&gt; &gt; specification of the attribute doesn&#39;t mention the length (on=
ly the length<br>
&gt; &gt; of the TLVs). Please specify the length and any considerations re=
lated to<br>
&gt; &gt; the Extended Length bit. Also, given that this is a new attribute=
, with an<br>
&gt; &gt; unspecified potential number of TLVs, and that the length is appa=
rently<br>
&gt; &gt; unbounded, all leading to the potential need for extended message=
s, please<br>
&gt; &gt; specify how to handle peers that cannot accommodate more than 4k =
octet<br>
&gt; &gt; messages (rfc8654).<br>
&gt;<br>
&gt; GIM&gt;&gt; I&#39;ve noticed a note from Jeff Hass. Would you agree wi=
th his opinion?<br>
<br>
Partially. ;-)<br>
<br>
He&#39;s right about the Extended Length bit.<br>
<br>
<br>
My reference to rfc8654 is because of this text from =C2=A75:<br>
<br>
=C2=A0 =C2=A0It is RECOMMENDED that BGP protocol developers and implementer=
s are<br>
=C2=A0 =C2=A0conservative in their application and use of BGP Extended Mess=
ages.<br>
=C2=A0 =C2=A0Future protocol specifications MUST describe how to handle pee=
rs that<br>
=C2=A0 =C2=A0can only accommodate 4,096 octet messages.<br>
<br>
As I mentioned before, it concerns me that the attribute (while having<br>
a narrow use in this document) can have wider applicability.=C2=A0 The<br>
extensibility is significant by allowing sequential or nested TLVs.<br>
This combination may result in a large attribute, leading to large<br>
Updates, specially when considering other MVPN-related<br>
attribute/communities, etc.<br></blockquote><div></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(2=
04,204,204);padding-left:1ex">
<br>
Considering the text in rfc8654, the question is: is the attribute<br>
necessary always, or can it be removed/omitted in some cases?=C2=A0 This is=
<br>
not an attribute that is necessary for route selection, for example.<br>
Given that rfc4271 says this:<br>
<br>
=C2=A0 =C2=A0If, due to the limits on the maximum size of an UPDATE message=
 (see<br>
=C2=A0 =C2=A0Section 4), a single route doesn&#39;t fit into the message, t=
he BGP<br>
=C2=A0 =C2=A0speaker MUST not advertise the route to its peers and MAY choo=
se to<br>
=C2=A0 =C2=A0log an error locally.<br>
<br>
...it may be possible that by not propagating the new attribute the<br>
size of the update will be reduced so that the advertisement can be<br>
made.=C2=A0 OTOH, if the attribute is removed then the tunnel can&#39;t be<=
br>
monitored.<br>
<br>
All I want is for you to consider any potential implications of the<br>
new attribute.=C2=A0 The conclusion may be that no further change is<br>
needed.<br></blockquote><div>

GIM2&gt;&gt; Thank you for further clarifying your comment. We are not defi=
ning any extensions to the BFD Discriminator attribute and it may not be po=
ssible to imagine all the potential extensions that could be proposed in th=
e future. It seems that it will be more appropriate to review the impact of=
 the specific extension of the BFD Discriminator attribute when it will be =
proposed. At that time, we&#39;ll need to consider that excluding the BFD D=
iscriminator attribute from an update will be interpreted as the removal of=
 the corresponding p2mp BFD session. That would not cause a switchover but =
just make MVPN failover to rely on the convergence of the BGP control plane=
.

=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
<br>
...<br>
&gt; &gt; (17) =C2=A7<a href=3D"http://3.1.6.1" rel=3D"noreferrer" target=
=3D"_blank">3.1.6.1</a>: &quot;MUST use its IP address as the source IP =C2=
=A0address&quot; Which<br>
&gt; &gt; address? Please be specific.<br>
&gt;<br>
&gt; GIM&gt;&gt; Section 3.1.6.1 includes the list that an Upstream PE is r=
equired to<br>
&gt; follow: To enable downstream PEs to track the P-tunnel status using a =
point-<br>
&gt; to-multipoint (P2MP) BFD session the Upstream PE:<br>
&gt; ....<br>
&gt; o MUST use its IP address as the source IP address when transmitting<b=
r>
&gt; BFD Control packets;<br>
&gt; Would adding the reference to the Upstream PE address your concern:<br=
>
&gt; o MUST use its, i.e., the Upstream PE&#39;s, IP address as the source =
IP address<br>
&gt; when transmitting BFD Control packets;<br>
<br>
No -- the question is which address of the Upstream PE?=C2=A0 I&#39;m assum=
ing<br>
that an upstream PE can have several addresses, which one is to be<br>
used?=C2=A0 I can guess it is the address of the interface used to reach<br=
>
the destination (or something like that)...but I would just want it to<br>
be clear.<br></blockquote><div>GIM2&gt;&gt; Thank you, I now better underst=
and the question. It it the PE address in the given VRF. I propose the foll=
owing update:</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0 o =C2=A0MUST use =
its PE address as the source IP address when transmitting</div>=C2=A0 =C2=
=A0 =C2=A0 BFD Control packets;</div><div class=3D"gmail_quote">Also, I thi=
nk that the text in the next section that defines the process on a downstre=
am PE needs clarification. I propose to update text as follows:</div><div c=
lass=3D"gmail_quote">OLD TEXT:</div><div class=3D"gmail_quote">=C2=A0 =C2=
=A0o =C2=A0MUST use the source IP address of the BFD Control packet, the<br=
>=C2=A0 =C2=A0 =C2=A0 value of the BFD Discriminator field, and the x-PMSI =
Tunnel<br>=C2=A0 =C2=A0 =C2=A0 Identifier [RFC6514] the BFD Control packet =
was received on to<br>=C2=A0 =C2=A0 =C2=A0 properly demultiplex BFD session=
s.</div><div class=3D"gmail_quote">NEW TEXT:</div><div class=3D"gmail_quote=
">=C2=A0 =C2=A0o =C2=A0to properly demultiplex BFD session MUST use:<br><br=
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the address of the PE that included the =
BFD Discriminator<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0attribute in the x-P=
MSI A-D Route;<br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the value of the BF=
D Discriminator field in the BFD<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Discr=
iminator attribute;<br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the x-PMSI Tun=
nel Identifier [RFC6514] the BFD Control packet<br>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0was received on.<br><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">
<br>
<br>
<br>
<br>
&gt; &gt; (18) =C2=A7<a href=3D"http://3.1.6.2" rel=3D"noreferrer" target=
=3D"_blank">3.1.6.2</a>: If the IP address doesn&#39;t map correctly at the=
 downstream<br>
&gt; &gt; PE (for example, a different local address is used that doesn&#39=
;t correspond<br>
&gt; &gt; to the information in the PMSI attribute), what action should it =
take? Can<br>
&gt; &gt; the tunnel still be monitored?<br>
&gt;<br>
&gt; GIM&gt;&gt; There&#39;s a possibility that the same downstream PE is m=
onitoring more<br>
&gt; than one P-tunnel. Since each Upstream PE assigns its own BFD Discrimi=
nator,<br>
&gt; there&#39;s a chance that the same value is picked by more than one Up=
stream PE.<br>
&gt; According to Section 5.7 of the RFC 8562:<br>
&gt; IP and MPLS multipoint tails MUST demultiplex BFD packets based on a<b=
r>
&gt; combination of the source address, My Discriminator, and the identity<=
br>
&gt; of the multipoint path that the multipoint BFD Control packet was<br>
&gt; received from. Together they uniquely identify the head of the<br>
&gt; multipoint path.<br>
&gt;<br>
&gt; We may consider adding the source address in the BFD Discriminator att=
ribute<br>
&gt; as an optional TLV. I think that might be a good extension that can be=
<br>
&gt; introduced in a new document.<br>
<br>
Why wait for a new document?=C2=A0 You made a pretty good case for<br>
signaling the source address.<br></blockquote><div>GIM2&gt;&gt; I&#39;d lik=
e to defer this question to our AD and BESS WG Chairs.=C2=A0</div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
...<br>
&gt; &gt; (22) =C2=A74: &quot;Such behavior is referred to as &quot;reverti=
ve&quot; behavior and MUST be<br>
&gt; &gt; supported.&quot; The text around this sentence seems to indicate =
that the<br>
&gt; &gt; revertive behavior is the default, is that the intent? Or if the =
intent<br>
&gt; &gt; for it just to be supported (as written)? Please be clear.<br>
&gt;<br>
&gt; GIM&gt;&gt; This part of the document has been updated in the course o=
f addressing<br>
&gt; IESG comments:<br>
&gt; Such behavior is referred to as &quot;revertive&quot; behavior and MUS=
T be supported.<br>
&gt; Non-revertive behavior refers to the behavior of continuing to select =
the<br>
&gt; backup PE as the UMH even after the Primary has come up. This non-reve=
rtive<br>
&gt; behavior MAY also be supported by an implementation and would be enabl=
ed<br>
&gt; through some configuration. Selection of the behavior, revertive or<br=
>
&gt; non-revertive, is an operational issue, but it MUST be consistent on a=
ll PEs<br>
&gt; in the given MVPN.<br>
&gt;<br>
&gt; Do you find the updated text clear enough?<br>
<br>
Yes.=C2=A0 But it now brings up a new question: can you provide operational=
<br>
guidance on the selection of this behavior?<br></blockquote><div>GIM2&gt;&g=
t; I think that the decision to prefer revertive behavior is based on the r=
esource allocation model for primary and standby P-tunnels. In cases where =
the switchover to the standby tunnel does not affect other services and pro=
vides the required quality of service, an operator might use non-revertive =
behavior to avoid unnecessary in such case switchover and thus minimize dis=
ruption to the multicast service. I&#39;d propose that be added as follows:=
</div><div>NEW TEXT:</div><div>While revertive is considered the default<br=
>=C2=A0 =C2=A0behavior, there might be cases where the switchover to the st=
andby<br>=C2=A0 =C2=A0tunnel does not affect other services and provides th=
e required<br>=C2=A0 =C2=A0quality of service.=C2=A0 An operator might use =
non-revertive behavior to<br>=C2=A0 =C2=A0avoid unnecessary in such case sw=
itchover and thus minimize<br>=C2=A0 =C2=A0disruption to the multicast serv=
ice.<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
&gt; &gt; (23) =C2=A74.1: &quot;...routes that carry the &quot;Standby PE&q=
uot; BGP Community MUST have<br>
&gt; &gt; the LOCAL_PREF attribute set to zero.&quot; What should a receive=
r do if the<br>
&gt; &gt; LOCAL_PREF is not zero?<br>
&gt;<br>
&gt; GIM&gt;&gt; I believe that the preceding text describes the situation =
when the<br>
&gt; LOCAL_PREF !=3D 0:<br>
&gt; ... two different downstream PEs<br>
&gt; consider different Upstream PEs to be the primary one. In that case,<b=
r>
&gt; without any precaution taken, both Upstream PEs would process a<br>
&gt; standby C-multicast route and possibly stop forwarding at the same<br>
&gt; time.<br>
<br>
No, it doesn&#39;t.=C2=A0 The text specifies that the update &quot;MUST hav=
e the<br>
LOCAL_PREF attribute set to zero&quot;.=C2=A0 The question is not about the=
<br>
potential effect, but about the value being anything else (&gt; 0).=C2=A0 N=
ote<br>
that the value can be low enough (&gt; 0) and no adverse effect may take<br=
>
place, but the text doesn&#39;t specify a &quot;low value&quot;, it explici=
tly<br>
specifies 0.<br></blockquote><div>GIM2&gt;&gt; I think I see it better now.=
 Would the following text work:</div><div>NEW TEXT:</div>=C2=A0 =C2=A0For t=
his purpose, routes that carry the Standby PE BGP<br>=C2=A0 =C2=A0Community=
 MUST have the LOCAL_PREF attribute set to the value lower<br>=C2=A0 =C2=A0=
than the value specified as the LOCAL_PREF attribute for the route<br>=C2=
=A0 =C2=A0that does not carry the Standby PE BGP Community.=C2=A0 The value=
 of zero<br>=C2=A0 =C2=A0is RECOMMENDED.</div><div class=3D"gmail_quote">Al=
so, the text regarding setting the LOCAL_PREF after the switchover may need=
, in my view, the update to not require it is set to zero:</div><div class=
=3D"gmail_quote">NEW TEXT:</div><div class=3D"gmail_quote">=C2=A0 =C2=A0The=
 new Upstream PE MUST set the LOCAL_PREF attribute<br>=C2=A0 =C2=A0for that=
 C-multicast route to the same value as when the Standby PE<br>=C2=A0 =C2=
=A0BGP Community was included in the advertisement.<br><div>=C2=A0</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
&gt; &gt; (24) =C2=A74.1: In the last paragraph of this section, if I follo=
w correctly,<br>
&gt; &gt; the text talks about the case where the standby becomes the prima=
ry and<br>
&gt; &gt; the updated advertisement doesn&#39;t have the Standby PE communi=
ty. If that<br>
&gt; &gt; is correct, then s/ presence/absence of the Standby PE BGP Commun=
ity/<br>
&gt; &gt; absence of the Standby PE BGP Community<br>
&gt; &gt;<br>
&gt; &gt; Also, the last sentence says that the &quot;LOCAL_PREF attribute =
MUST be set to<br>
&gt; &gt; zero&quot;. If the community is not present, how can a receiver e=
nforce this?<br>
&gt; &gt; What action should it take if the LOCAL_PREF has a different valu=
e?<br>
&gt;<br>
&gt; GIM&gt;&gt; Thank you for the suggestion, it clarifies the text. As I =
understand,<br>
&gt; the requirement is for the Standby Upstream PE, not for a downstream P=
E. Would<br>
&gt; the following update make that clearer:<br>
&gt; OLD TEXT:<br>
&gt; The LOCAL_PREF attribute MUST be set to zero.<br>
&gt; NEW TEXT:<br>
&gt; The new Upstream PE MUST set the LOCAL_PREF attribute to<br>
&gt; zero for that C-multicast route.<br>
<br>
I don&#39;t know what the difference in the meaning is. :-(<br>
<br>
There are three parts to my question:<br>
<br>
(1) If the community is not present, then this would be a &quot;normal&quot=
;<br>
Update.=C2=A0 How does the receiver know the difference so it can enforce<b=
r>
the &quot;MUST&quot;?<br>
<br>
(2) What should the receiver do if the value is not as specified?<br>
<br>
(3) Given that the LOCAL_PREF for Updates *with* the community MUST be<br>
0, what&#39;s the use of sending Updates *without* the community with the<b=
r>
same value?<br></blockquote><div>GIM2&gt;&gt; Had the change above addresse=
d this comment?=C2=A0</div></div></div>

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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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On December 22, 2020 at 10:59:19 PM, Greg Mirsky wrote:


Greg:

Hi!

I think we have converged on the first two DISCUSS points. =C2=A0On the
third one, I do want to give bfd/idr an opportunity to comment -- I
agree with you that we should wait for Martin (I believe he's out for
the rest of the year).

There are just a couple of comments left.

Thanks!!

Happy Holidays!

Alvaro.



> > > > -------------------------------------------------------------------=
---
> > > > DISCUSS:
> > > > -------------------------------------------------------------------=
---
> > > >
> > > > (1) ...
> > > >
> > Your initial statement that "it might be not that simple to compare"
> > is precisely the reason I think that operational guidance is needed.
>
> GIM2>> I propose a new sub-section to summarize the benefits and challeng=
es
> of methods described in Section 3.1: 3.1.8. Operational Considerations fo=
r
> Monitoring P-Tunnel's Status

This is a good start.

There are some nits/grammar enhancements that I'll leave for now. =C2=A0A
couple of other comments/questions in-line.


> Several methods to monitor the status of a P-tunnel are described in
> Section 3.1. Though there might be no perfect method, a comparison
> of benefits and challenges of each technique could be helpful to both
> implementors and network operators.

"a comparison of benefits and challenges of each technique could be helpful=
"

The "could" makes it sound as if that is work for another
day/document. =C2=A0Simply get rid of that last sentence.


> Tracking the root of an MVPN (Section 3.1.1) concludes about the
> status of a P-tunnel based on the control plane information.
> Because, in general, the MPLS data plane is not fate-sharing with the
> control plane, this method might produce false positive or false
> negative alarms. On the other hand, because BGP next-hop tracking is
> broadly supported and deployed, this method might be the easiest to
> deploy.

"...might produce false positive or false negative alarms."

Maybe add something like "resulting in tunnels that seem up but are
not able to reach the root, or ones that are declared down
prematurely" -- just to explain a little the potential effect.


> Method described in Section 3.1.2 monitors the state of the data
> plane but only for an egress P-PE link of a P-tunnel. As a result,
> network failures that affect upstream links might not be detected
> using this method and the MVPN convergence would be determined by the
> convergence of the BGP control plane.

"...would be determined by the convergence of the BGP control plane."

This is a case where it seems that combining =C2=A73.1.1/=C2=A73.1.2 would =
make
sense. In fact, tracking the state of the root seems helpful in other
cases too (below) that are looking at different things. =C2=A0You said
before that you didn't think combining the methods make sense -- can
you please explain why in this section?


> Using the state change of a P2MP RSVP-TE LSP as the trigger to re-
> evaluate the status of the P-tunnel (Section 3.1.3) relies on the
> mechanism used to monitor the state of the P2MP LSP.
>
> The method described in Section 3.1.4 is simple and prone to false
> alarms but it is applicable to a sub-set of MVPNs, those that use the
> leaf-triggered x-PMSI tunnels.

"false alarms"

As with the false indicators above, maybe include a simple example of
the effect.


> Though some MVPN might be used to provide a multicast service with
> predictable interpacket interval (Section 3.1.5), the number of such
> cases seem limited.
>
> Monitoring the status of a P-tunnel using p2mp BFD session
> (Section 3.1.6) may produce the most accurate and expedient failure
> notification of all monitoring methods discussed. On the other hand,
> it requires careful consideration of the additional load of BFD onto
> network and PE nodes.

"requires careful consideration of the additional load of BFD"

A reference would be nice.




> > > > (2) ...
> > > >
> > My point here is that you don't need the attribute for BFD to be an
> > useful tool. However, the description of the tool (monitoring) is
> > tied to the attribute (including the point below about deleting the
> > BFD session). It doesn't have to be: the use of BFD should be
> > independent of the bootstrapping mechanism.
> >
> > Do you consider other possible ways of bootstrapping the session
> > valid? Would it be ok to use them to enable the use of BFD? Can a
> > BFD session that is setup using a different mechanism used to monitor
> > the tunnel?
>
> GIM2>> Thank you for clarifying the question. Yes, a p2mp BFD session can=
 be
> instantiated using some other than the BFD Discriminator attribute method=
.
> draft-mirsky-mpls-p2mp-bfd gives several options and describes how MPLS L=
SP
> Ping can be used. But that method, in my opinion, has some operational
> issues and is less preferable compared to using an extension of a control
> plane protocol. Other examples of extending a protocol to bootstrap a p2m=
p
> BFD session can be found in the draft.
>
> I've added a note in the first paragraph of Section 3.1.6 to clarify that
> the use of the BFD Discriminator attribute is optional:
>
> NEW TEXT:
> The P-tunnel status may be derived from the status of a multipoint
> BFD session [RFC8562] whose discriminator is advertised along with an
> x-PMSI A-D Route. A P2MP BFD session can be instantiated using a
> mechanism other than the BFD Discriminator attribute, e.g., MPLS LSP
> Ping ([I-D.mirsky-mpls-p2mp-bfd]). Description of these methods is
> outside the scope of this document.

Ok, that's fine. =C2=A0See a related comment below (15).




> > > > (2b) ...
> > > >
> > BTW, I agree with Jeff in > that bfd/idr should be given the opportunit=
y
> > to review this document.
>
> GIM2>> I'm leaving this decision to the AD and Chairs of BESS and BFD WGs=
.

Yup.




> > > > -------------------------------------------------------------------=
---
> > > > COMMENT:
> > > > -------------------------------------------------------------------=
---
...
> > > > (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be consider=
ed
> > > > malformed if its length is not a non-zero multiple of four." Ok,
> > > > except that the specification of the attribute doesn't mention the
> > > > length (only the length of the TLVs). Please specify the length...

Don't forget to specify the length of the attribute.



...
> > All I want is for you to consider any potential implications of the
> > new attribute. The conclusion may be that no further change is
> > needed.
>
> GIM2>> Thank you for further clarifying your comment. We are not defining
> any extensions to the BFD Discriminator attribute and it may not be possi=
ble
> to imagine all the potential extensions that could be proposed in the
> future. It seems that it will be more appropriate to review the impact of
> the specific extension of the BFD Discriminator attribute when it will be
> proposed. At that time, we'll need to consider that excluding the BFD
> Discriminator attribute from an update will be interpreted as the removal=
 of
> the corresponding p2mp BFD session. That would not cause a switchover but
> just make MVPN failover to rely on the convergence of the BGP control pla=
ne.

Fair enough.


Two more comments (related, but different):

(a) Being that the attribute (just like other attributes) is not
protected, it can be removed in flight (for example, by a rogue node).
As you mentioned, that action will not cause a switchover, but (from
the end of =C2=A73.1.6) the BFD session will be deleted causing the tunnel
to be left unmonitored. =C2=A0There isn't much that can be done about this,
but it should be mentioned somewhere (maybe the Security
Considerations section).

(b) Back to my DISCUSS point about not needing the attribute to
bootstrap the BFD session: =C2=A0If the BFD session is already up (maybe it
was done using the attribute or maybe it was manually configured, it
doesn't matter), then not including the attribute disables the
monitoring, regardless of how the session was set up. =C2=A0The last
paragraph in =C2=A73.1.6 says this:

=C2=A0 =C2=A0If the downstream PE's P-tunnel is already established, its st=
ate
=C2=A0 =C2=A0being monitored by the P2MP BFD session, and the downstream PE
=C2=A0 =C2=A0receives the new x-PMSI A-D Route without the BFD Discriminato=
r
=C2=A0 =C2=A0attribute, and the x-PMSI A-D Route was processed without any =
error
=C2=A0 =C2=A0as per the relevant specifications, the downstream PE:

I guess the intent was to say: "if the BFD session was set up using
the attribute and the attribute is not present anymore". =C2=A0But the text
doesn't make that clarification, and a direct reading would result in
deleting the BFD session even if the attribute was not used.

Suggestion>
=C2=A0 =C2=A0If the downstream PE's P-tunnel is already established, its st=
ate being
=C2=A0 =C2=A0monitored by the P2MP BFD session set up using the BFD Discrim=
inator
=C2=A0 =C2=A0Attribute...





> > > > (17) ...
> > > >
> > No -- the question is which address of the Upstream PE? I'm assuming
> > that an upstream PE can have several addresses, which one is to be
> > used? I can guess it is the address of the interface used to reach
> > the destination (or something like that)...but I would just want it to
> > be clear.
>
> GIM2>> Thank you, I now better understand the question. It it the PE addr=
ess
> in the given VRF. I propose the following update:
>
> NEW TEXT:
> o MUST use its PE address as the source IP address when transmitting
> BFD Control packets;

I'm not sure that "PE address" is the best clarification. =C2=A0I'll let
you figure it out. :-)


> Also, I think that the text in the next section that defines the process =
on a
> downstream PE needs clarification. I propose to update text as follows:
> OLD TEXT:
> o MUST use the source IP address of the BFD Control packet, the
> value of the BFD Discriminator field, and the x-PMSI Tunnel
> Identifier [RFC6514] the BFD Control packet was received on to
> properly demultiplex BFD sessions.
> NEW TEXT:
> o to properly demultiplex BFD session MUST use:
>
> the address of the PE that included the BFD Discriminator
> attribute in the x-PMSI A-D Route;
>
> the value of the BFD Discriminator field in the BFD
> Discriminator attribute;
>
> the x-PMSI Tunnel Identifier [RFC6514] the BFD Control packet
> was received on.

This looks good.



> > > > (18) =C2=A73.1.6.2(http://3.1.6.2): If the IP address doesn't map c=
orrectly
> > > > at the downstream PE (for example, a different local address is use=
d
> > > > that doesn't correspond to the information in the PMSI attribute),
> > > > what action should it take? Can the tunnel still be monitored?
> > >
> > > GIM>> There's a possibility that the same downstream PE is monitoring
> > > more than one P-tunnel. Since each Upstream PE assigns its own BFD
> > > Discriminator, there's a chance that the same value is picked by more
> > > than one Upstream PE.
> > > According to Section 5.7 of the RFC 8562:
> > > IP and MPLS multipoint tails MUST demultiplex BFD packets based on a
> > > combination of the source address, My Discriminator, and the identity
> > > of the multipoint path that the multipoint BFD Control packet was
> > > received from. Together they uniquely identify the head of the
> > > multipoint path.
> > >
> > > We may consider adding the source address in the BFD Discriminator
> > > attribute as an optional TLV. I think that might be a good extension
> > > that can be introduced in a new document.
> >
> > Why wait for a new document? You made a pretty good case for
> > signaling the source address.
>
> GIM2>> I'd like to defer this question to our AD and BESS WG Chairs.

Again, you made a good case for why it is needed for the mechanism to
work. =C2=A0Leaving it for later might just leave a hole. =C2=A0Sure, let's=
 hear
from the Chairs/AD.




...
> > > > (23) ...
> > > >
> > No, it doesn't. The text specifies that the update "MUST have the
> > LOCAL_PREF attribute set to zero". The question is not about the
> > potential effect, but about the value being anything else (> 0). Note
> > that the value can be low enough (> 0) and no adverse effect may take
> > place, but the text doesn't specify a "low value", it explicitly
> > specifies 0.
>
> GIM2>> I think I see it better now. Would the following text work:
>
> NEW TEXT:
> For this purpose, routes that carry the Standby PE BGP
> Community MUST have the LOCAL_PREF attribute set to the value lower
> than the value specified as the LOCAL_PREF attribute for the route
> that does not carry the Standby PE BGP Community. The value of zero
> is RECOMMENDED.

Yeah...I still have a problem with "MUST have the LOCAL_PREF attribute
set to the value lower than..." because there's no practical way to
enforce that by the receiver: if the update with the community comes
in first then now the receiver was to remember to check when the other
update comes in later...

s/MUST/must
The "RECOMMENDED" part should be enough.


> Also, the text regarding setting the LOCAL_PREF after the switchover may
> need, in my view, the update to not require it is set to zero:
>
> NEW TEXT:
> The new Upstream PE MUST set the LOCAL_PREF attribute
> for that C-multicast route to the same value as when the Standby PE
> BGP Community was included in the advertisement.

Same thing here: s/MUST/must


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 23 Dec 2020 10:51:01 -0800
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To: Alvaro Retana <aretana.ietf@gmail.com>
Cc: "bfd-chairs@ietf.org" <bfd-chairs@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>,  "draft-ietf-bess-mvpn-fast-failover@ietf.org" <draft-ietf-bess-mvpn-fast-failover@ietf.org>,  "bess-chairs@ietf.org" <bess-chairs@ietf.org>, The IESG <iesg@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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Hi Alvaro,
happy Holidays to you and everyone you care about!

Thank you for the great discussion and thought stimulating clues. I've
added more follow-up notes in-line now tagged by GIM3>>.

Regards,
Greg

On Wed, Dec 23, 2020 at 8:16 AM Alvaro Retana <aretana.ietf@gmail.com>
wrote:

> On December 22, 2020 at 10:59:19 PM, Greg Mirsky wrote:
>
>
> Greg:
>
> Hi!
>
> I think we have converged on the first two DISCUSS points.  On the
> third one, I do want to give bfd/idr an opportunity to comment -- I
> agree with you that we should wait for Martin (I believe he's out for
> the rest of the year).
>
GIM3>> I'm glad you feel we've converged on the two DISCUSSes.

>
> There are just a couple of comments left.
>
> Thanks!!
>
> Happy Holidays!
>
> Alvaro.
>
>
>
> > > > >
> ----------------------------------------------------------------------
> > > > > DISCUSS:
> > > > >
> ----------------------------------------------------------------------
> > > > >
> > > > > (1) ...
> > > > >
> > > Your initial statement that "it might be not that simple to compare"
> > > is precisely the reason I think that operational guidance is needed.
> >
> > GIM2>> I propose a new sub-section to summarize the benefits and
> challenges
> > of methods described in Section 3.1: 3.1.8. Operational Considerations
> for
> > Monitoring P-Tunnel's Status
>
> This is a good start.
>
> There are some nits/grammar enhancements that I'll leave for now.  A
> couple of other comments/questions in-line.
>
>
> > Several methods to monitor the status of a P-tunnel are described in
> > Section 3.1. Though there might be no perfect method, a comparison
> > of benefits and challenges of each technique could be helpful to both
> > implementors and network operators.
>
> "a comparison of benefits and challenges of each technique could be
> helpful"
>
> The "could" makes it sound as if that is work for another
> day/document.  Simply get rid of that last sentence.
>
GIM3>> OKay

>
>
> > Tracking the root of an MVPN (Section 3.1.1) concludes about the
> > status of a P-tunnel based on the control plane information.
> > Because, in general, the MPLS data plane is not fate-sharing with the
> > control plane, this method might produce false positive or false
> > negative alarms. On the other hand, because BGP next-hop tracking is
> > broadly supported and deployed, this method might be the easiest to
> > deploy.
>
> "...might produce false positive or false negative alarms."
>
> Maybe add something like "resulting in tunnels that seem up but are
> not able to reach the root, or ones that are declared down
> prematurely" -- just to explain a little the potential effect.
>
GIM3>> Thank you for the specific examples.

>
>
> > Method described in Section 3.1.2 monitors the state of the data
> > plane but only for an egress P-PE link of a P-tunnel. As a result,
> > network failures that affect upstream links might not be detected
> > using this method and the MVPN convergence would be determined by the
> > convergence of the BGP control plane.
>
> "...would be determined by the convergence of the BGP control plane."
>
> This is a case where it seems that combining =C2=A73.1.1/=C2=A73.1.2 woul=
d make
> sense. In fact, tracking the state of the root seems helpful in other
> cases too (below) that are looking at different things.  You said
> before that you didn't think combining the methods make sense -- can
> you please explain why in this section?
>
GIM3>> But that would be my personal opinion that the WG might not agree.
I'm always glad to discuss technical ideas, pros, and contras of that or
this approach to solve the problem but I feel uneasy adding my personal
opinions in the WG document. The document lists a set of techniques but how
they are combined in a product is left for product managers and developers
to decide. Would you agree?

>
>
> > Using the state change of a P2MP RSVP-TE LSP as the trigger to re-
> > evaluate the status of the P-tunnel (Section 3.1.3) relies on the
> > mechanism used to monitor the state of the P2MP LSP.
> >
> > The method described in Section 3.1.4 is simple and prone to false
> > alarms but it is applicable to a sub-set of MVPNs, those that use the
> > leaf-triggered x-PMSI tunnels.
>
> "false alarms"
>
> As with the false indicators above, maybe include a simple example of
> the effect.
>
GIM3>> Ooops, I meant to write "not prone" as "safe from causing false
alarms".
NEW TEXT:
   The method described in Section 3.1.4 is simple and is safe from
   causing false alarms, e.g., considering a tunnel operationally up
   even though its data path has a defect or, conversely, declaring a
   tunnel failed when it is unaffected.  But the method applies to a
   sub-set of MVPNs, those that use the leaf-triggered x-PMSI tunnels.

>
>
> > Though some MVPN might be used to provide a multicast service with
> > predictable interpacket interval (Section 3.1.5), the number of such
> > cases seem limited.
> >
> > Monitoring the status of a P-tunnel using p2mp BFD session
> > (Section 3.1.6) may produce the most accurate and expedient failure
> > notification of all monitoring methods discussed. On the other hand,
> > it requires careful consideration of the additional load of BFD onto
> > network and PE nodes.
>
> "requires careful consideration of the additional load of BFD"
>
> A reference would be nice.
>
GIM3>> I've updated the text with some details. Please let me know if it
works:
NEW TEXT:
   Operators should consider the rate of BFD
   Control packets transmitted by root PEs combined with the number of
   such PEs in the network.  In addition, the number of P2MP BFD
   sessions per PE determines the amount of state information that a PE
   maintains.
>
>
>
>
>
> > > > > (2) ...
> > > > >
> > > My point here is that you don't need the attribute for BFD to be an
> > > useful tool. However, the description of the tool (monitoring) is
> > > tied to the attribute (including the point below about deleting the
> > > BFD session). It doesn't have to be: the use of BFD should be
> > > independent of the bootstrapping mechanism.
> > >
> > > Do you consider other possible ways of bootstrapping the session
> > > valid? Would it be ok to use them to enable the use of BFD? Can a
> > > BFD session that is setup using a different mechanism used to monitor
> > > the tunnel?
> >
> > GIM2>> Thank you for clarifying the question. Yes, a p2mp BFD session
> can be
> > instantiated using some other than the BFD Discriminator attribute
> method.
> > draft-mirsky-mpls-p2mp-bfd gives several options and describes how MPLS
> LSP
> > Ping can be used. But that method, in my opinion, has some operational
> > issues and is less preferable compared to using an extension of a contr=
ol
> > plane protocol. Other examples of extending a protocol to bootstrap a
> p2mp
> > BFD session can be found in the draft.
> >
> > I've added a note in the first paragraph of Section 3.1.6 to clarify th=
at
> > the use of the BFD Discriminator attribute is optional:
> >
> > NEW TEXT:
> > The P-tunnel status may be derived from the status of a multipoint
> > BFD session [RFC8562] whose discriminator is advertised along with an
> > x-PMSI A-D Route. A P2MP BFD session can be instantiated using a
> > mechanism other than the BFD Discriminator attribute, e.g., MPLS LSP
> > Ping ([I-D.mirsky-mpls-p2mp-bfd]). Description of these methods is
> > outside the scope of this document.
>
> Ok, that's fine.  See a related comment below (15).
>
>
>
>
> > > > > (2b) ...
> > > > >
> > > BTW, I agree with Jeff in > that bfd/idr should be given the
> opportunity
> > > to review this document.
> >
> > GIM2>> I'm leaving this decision to the AD and Chairs of BESS and BFD
> WGs.
>
> Yup.
>
>
>
>
> > > > >
> ----------------------------------------------------------------------
> > > > > COMMENT:
> > > > >
> ----------------------------------------------------------------------
> ...
> > > > > (15) =C2=A73.1.6: "The BFD Discriminator attribute MUST be consid=
ered
> > > > > malformed if its length is not a non-zero multiple of four." Ok,
> > > > > except that the specification of the attribute doesn't mention th=
e
> > > > > length (only the length of the TLVs). Please specify the length..=
.
>
> Don't forget to specify the length of the attribute.
>
GIM3>> Resulting from the discussion with Jeff, the text we've agreed to is
now as follows:
NEW TEXT:
   The BFD Discriminator attribute MUST be considered malformed if its
   length is smaller than five octets or if Optional TLVs are present,
   but not well-formed.
>
>
>
>
> ...
> > > All I want is for you to consider any potential implications of the
> > > new attribute. The conclusion may be that no further change is
> > > needed.
> >
> > GIM2>> Thank you for further clarifying your comment. We are not defini=
ng
> > any extensions to the BFD Discriminator attribute and it may not be
> possible
> > to imagine all the potential extensions that could be proposed in the
> > future. It seems that it will be more appropriate to review the impact =
of
> > the specific extension of the BFD Discriminator attribute when it will =
be
> > proposed. At that time, we'll need to consider that excluding the BFD
> > Discriminator attribute from an update will be interpreted as the
> removal of
> > the corresponding p2mp BFD session. That would not cause a switchover b=
ut
> > just make MVPN failover to rely on the convergence of the BGP control
> plane.
>
> Fair enough.
>
>
> Two more comments (related, but different):
>
> (a) Being that the attribute (just like other attributes) is not
> protected, it can be removed in flight (for example, by a rogue node).
> As you mentioned, that action will not cause a switchover, but (from
> the end of =C2=A73.1.6) the BFD session will be deleted causing the tunne=
l
> to be left unmonitored.  There isn't much that can be done about this,
> but it should be mentioned somewhere (maybe the Security
> Considerations section).
>
> (b) Back to my DISCUSS point about not needing the attribute to
> bootstrap the BFD session:  If the BFD session is already up (maybe it
> was done using the attribute or maybe it was manually configured, it
> doesn't matter), then not including the attribute disables the
> monitoring, regardless of how the session was set up.  The last
> paragraph in =C2=A73.1.6 says this:
>
>    If the downstream PE's P-tunnel is already established, its state
>    being monitored by the P2MP BFD session, and the downstream PE
>    receives the new x-PMSI A-D Route without the BFD Discriminator
>    attribute, and the x-PMSI A-D Route was processed without any error
>    as per the relevant specifications, the downstream PE:
>
> I guess the intent was to say: "if the BFD session was set up using
> the attribute and the attribute is not present anymore".  But the text
> doesn't make that clarification, and a direct reading would result in
> deleting the BFD session even if the attribute was not used.
>
> Suggestion>
>    If the downstream PE's P-tunnel is already established, its state bein=
g
>    monitored by the P2MP BFD session set up using the BFD Discriminator
>    Attribute...
>
GIM3>> Thank you for the detailed and clear explanation. I've used the
suggested text.


>
>
>
>
> > > > > (17) ...
> > > > >
> > > No -- the question is which address of the Upstream PE? I'm assuming
> > > that an upstream PE can have several addresses, which one is to be
> > > used? I can guess it is the address of the interface used to reach
> > > the destination (or something like that)...but I would just want it t=
o
> > > be clear.
> >
> > GIM2>> Thank you, I now better understand the question. It it the PE
> address
> > in the given VRF. I propose the following update:
> >
> > NEW TEXT:
> > o MUST use its PE address as the source IP address when transmitting
> > BFD Control packets;
>
> I'm not sure that "PE address" is the best clarification.  I'll let
> you figure it out. :-)
>
GIM3>> RFC 6513 refers to the Upstream PE Address. The PE Distinguisher
Labels Attribute, defined in RFC 6514, includes the PE Address field. BFD
must use the same PE address.

>
>
> > Also, I think that the text in the next section that defines the proces=
s
> on a
> > downstream PE needs clarification. I propose to update text as follows:
> > OLD TEXT:
> > o MUST use the source IP address of the BFD Control packet, the
> > value of the BFD Discriminator field, and the x-PMSI Tunnel
> > Identifier [RFC6514] the BFD Control packet was received on to
> > properly demultiplex BFD sessions.
> > NEW TEXT:
> > o to properly demultiplex BFD session MUST use:
> >
> > the address of the PE that included the BFD Discriminator
> > attribute in the x-PMSI A-D Route;
> >
> > the value of the BFD Discriminator field in the BFD
> > Discriminator attribute;
> >
> > the x-PMSI Tunnel Identifier [RFC6514] the BFD Control packet
> > was received on.
>
> This looks good.
>
GIM3>> Thank you.

>
>
>
> > > > > (18) =C2=A73.1.6.2(http://3.1.6.2): If the IP address doesn't map
> correctly
> > > > > at the downstream PE (for example, a different local address is
> used
> > > > > that doesn't correspond to the information in the PMSI attribute)=
,
> > > > > what action should it take? Can the tunnel still be monitored?
> > > >
> > > > GIM>> There's a possibility that the same downstream PE is monitori=
ng
> > > > more than one P-tunnel. Since each Upstream PE assigns its own BFD
> > > > Discriminator, there's a chance that the same value is picked by mo=
re
> > > > than one Upstream PE.
> > > > According to Section 5.7 of the RFC 8562:
> > > > IP and MPLS multipoint tails MUST demultiplex BFD packets based on =
a
> > > > combination of the source address, My Discriminator, and the identi=
ty
> > > > of the multipoint path that the multipoint BFD Control packet was
> > > > received from. Together they uniquely identify the head of the
> > > > multipoint path.
> > > >
> > > > We may consider adding the source address in the BFD Discriminator
> > > > attribute as an optional TLV. I think that might be a good extensio=
n
> > > > that can be introduced in a new document.
> > >
> > > Why wait for a new document? You made a pretty good case for
> > > signaling the source address.
> >
> > GIM2>> I'd like to defer this question to our AD and BESS WG Chairs.
>
> Again, you made a good case for why it is needed for the mechanism to
> work.  Leaving it for later might just leave a hole.  Sure, let's hear
> from the Chairs/AD.
>
>
>
>
> ...
> > > > > (23) ...
> > > > >
> > > No, it doesn't. The text specifies that the update "MUST have the
> > > LOCAL_PREF attribute set to zero". The question is not about the
> > > potential effect, but about the value being anything else (> 0). Note
> > > that the value can be low enough (> 0) and no adverse effect may take
> > > place, but the text doesn't specify a "low value", it explicitly
> > > specifies 0.
> >
> > GIM2>> I think I see it better now. Would the following text work:
> >
> > NEW TEXT:
> > For this purpose, routes that carry the Standby PE BGP
> > Community MUST have the LOCAL_PREF attribute set to the value lower
> > than the value specified as the LOCAL_PREF attribute for the route
> > that does not carry the Standby PE BGP Community. The value of zero
> > is RECOMMENDED.
>
> Yeah...I still have a problem with "MUST have the LOCAL_PREF attribute
> set to the value lower than..." because there's no practical way to
> enforce that by the receiver: if the update with the community comes
> in first then now the receiver was to remember to check when the other
> update comes in later...
>
> s/MUST/must
> The "RECOMMENDED" part should be enough.
>
GIM3>> Applied

>
>
> > Also, the text regarding setting the LOCAL_PREF after the switchover ma=
y
> > need, in my view, the update to not require it is set to zero:
> >
> > NEW TEXT:
> > The new Upstream PE MUST set the LOCAL_PREF attribute
> > for that C-multicast route to the same value as when the Standby PE
> > BGP Community was included in the advertisement.
>
> Same thing here: s/MUST/must
>
GIM3>> Applied

--000000000000dbaffa05b7262cf5
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Alvaro,<div>happy Holidays to you and =
everyone you care about!</div><div><br></div><div>Thank you for the great d=
iscussion and thought stimulating clues. I&#39;ve added more follow-up note=
s in-line now tagged by GIM3&gt;&gt;.</div><div><br></div><div>Regards,</di=
v><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" clas=
s=3D"gmail_attr">On Wed, Dec 23, 2020 at 8:16 AM Alvaro Retana &lt;<a href=
=3D"mailto:aretana.ietf@gmail.com">aretana.ietf@gmail.com</a>&gt; wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">On December 22, 20=
20 at 10:59:19 PM, Greg Mirsky wrote:<br>
<br>
<br>
Greg:<br>
<br>
Hi!<br>
<br>
I think we have converged on the first two DISCUSS points.=C2=A0 On the<br>
third one, I do want to give bfd/idr an opportunity to comment -- I<br>
agree with you that we should wait for Martin (I believe he&#39;s out for<b=
r>
the rest of the year).<br></blockquote><div>GIM3&gt;&gt; I&#39;m glad you f=
eel we&#39;ve converged on the two DISCUSSes.=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
There are just a couple of comments left.<br>
<br>
Thanks!!<br>
<br>
Happy Holidays!<br>
<br>
Alvaro.<br>
<br>
<br>
<br>
&gt; &gt; &gt; &gt; -------------------------------------------------------=
---------------<br>
&gt; &gt; &gt; &gt; DISCUSS:<br>
&gt; &gt; &gt; &gt; -------------------------------------------------------=
---------------<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; (1) ...<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; Your initial statement that &quot;it might be not that simple to =
compare&quot;<br>
&gt; &gt; is precisely the reason I think that operational guidance is need=
ed.<br>
&gt;<br>
&gt; GIM2&gt;&gt; I propose a new sub-section to summarize the benefits and=
 challenges<br>
&gt; of methods described in Section 3.1: 3.1.8. Operational Considerations=
 for<br>
&gt; Monitoring P-Tunnel&#39;s Status<br>
<br>
This is a good start.<br>
<br>
There are some nits/grammar enhancements that I&#39;ll leave for now. =C2=
=A0A<br>
couple of other comments/questions in-line.<br>
<br>
<br>
&gt; Several methods to monitor the status of a P-tunnel are described in<b=
r>
&gt; Section 3.1. Though there might be no perfect method, a comparison<br>
&gt; of benefits and challenges of each technique could be helpful to both<=
br>
&gt; implementors and network operators.<br>
<br>
&quot;a comparison of benefits and challenges of each technique could be he=
lpful&quot;<br>
<br>
The &quot;could&quot; makes it sound as if that is work for another<br>
day/document.=C2=A0 Simply get rid of that last sentence.<br></blockquote><=
div>GIM3&gt;&gt; OKay=C2=A0</div><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-le=
ft:1ex">
<br>
<br>
&gt; Tracking the root of an MVPN (Section 3.1.1) concludes about the<br>
&gt; status of a P-tunnel based on the control plane information.<br>
&gt; Because, in general, the MPLS data plane is not fate-sharing with the<=
br>
&gt; control plane, this method might produce false positive or false<br>
&gt; negative alarms. On the other hand, because BGP next-hop tracking is<b=
r>
&gt; broadly supported and deployed, this method might be the easiest to<br=
>
&gt; deploy.<br>
<br>
&quot;...might produce false positive or false negative alarms.&quot;<br>
<br>
Maybe add something like &quot;resulting in tunnels that seem up but are<br=
>
not able to reach the root, or ones that are declared down<br>
prematurely&quot; -- just to explain a little the potential effect.<br></bl=
ockquote><div>GIM3&gt;&gt; Thank you for the specific examples.</div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
&gt; Method described in Section 3.1.2 monitors the state of the data<br>
&gt; plane but only for an egress P-PE link of a P-tunnel. As a result,<br>
&gt; network failures that affect upstream links might not be detected<br>
&gt; using this method and the MVPN convergence would be determined by the<=
br>
&gt; convergence of the BGP control plane.<br>
<br>
&quot;...would be determined by the convergence of the BGP control plane.&q=
uot;<br>
<br>
This is a case where it seems that combining =C2=A73.1.1/=C2=A73.1.2 would =
make<br>
sense. In fact, tracking the state of the root seems helpful in other<br>
cases too (below) that are looking at different things.=C2=A0 You said<br>
before that you didn&#39;t think combining the methods make sense -- can<br=
>
you please explain why in this section?<br></blockquote><div>GIM3&gt;&gt; B=
ut that would be my personal opinion that the=C2=A0WG might not agree. I&#3=
9;m always glad to discuss technical ideas, pros, and contras of that or th=
is approach to solve the problem but I feel uneasy adding my personal opini=
ons in the WG document. The document lists a set of techniques but how they=
 are combined in a product is left for product managers and developers to d=
ecide. Would you agree?</div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex">
<br>
<br>
&gt; Using the state change of a P2MP RSVP-TE LSP as the trigger to re-<br>
&gt; evaluate the status of the P-tunnel (Section 3.1.3) relies on the<br>
&gt; mechanism used to monitor the state of the P2MP LSP.<br>
&gt;<br>
&gt; The method described in Section 3.1.4 is simple and prone to false<br>
&gt; alarms but it is applicable to a sub-set of MVPNs, those that use the<=
br>
&gt; leaf-triggered x-PMSI tunnels.<br>
<br>
&quot;false alarms&quot;<br>
<br>
As with the false indicators above, maybe include a simple example of<br>
the effect.<br></blockquote><div>GIM3&gt;&gt; Ooops, I meant to write &quot=
;not prone&quot; as &quot;safe from causing false alarms&quot;.=C2=A0</div>=
<div>NEW TEXT:</div><div>=C2=A0 =C2=A0The method described in Section 3.1.4=
 is simple and is safe from<br>=C2=A0 =C2=A0causing false alarms, e.g., con=
sidering a tunnel operationally up<br>=C2=A0 =C2=A0even though its data pat=
h has a defect or, conversely, declaring a<br>=C2=A0 =C2=A0tunnel failed wh=
en it is unaffected.=C2=A0 But the method applies to a<br>=C2=A0 =C2=A0sub-=
set of MVPNs, those that use the leaf-triggered x-PMSI tunnels.<br></div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
&gt; Though some MVPN might be used to provide a multicast service with<br>
&gt; predictable interpacket interval (Section 3.1.5), the number of such<b=
r>
&gt; cases seem limited.<br>
&gt;<br>
&gt; Monitoring the status of a P-tunnel using p2mp BFD session<br>
&gt; (Section 3.1.6) may produce the most accurate and expedient failure<br=
>
&gt; notification of all monitoring methods discussed. On the other hand,<b=
r>
&gt; it requires careful consideration of the additional load of BFD onto<b=
r>
&gt; network and PE nodes.<br>
<br>
&quot;requires careful consideration of the additional load of BFD&quot;<br=
>
<br>
A reference would be nice.<br></blockquote><div>GIM3&gt;&gt; I&#39;ve updat=
ed the text with some details. Please let me know if it works:</div><div>NE=
W TEXT:</div><div>=C2=A0 =C2=A0Operators should consider the rate of BFD</d=
iv>=C2=A0 =C2=A0Control packets transmitted by root PEs combined with the n=
umber of<br>=C2=A0 =C2=A0such PEs in the network.=C2=A0 In addition, the nu=
mber of P2MP BFD<br>=C2=A0 =C2=A0sessions per PE determines the amount of s=
tate information that a PE<br>=C2=A0 =C2=A0maintains.<blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex">
<br>
<br>
<br>
<br>
&gt; &gt; &gt; &gt; (2) ...<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; My point here is that you don&#39;t need the attribute for BFD to=
 be an<br>
&gt; &gt; useful tool. However, the description of the tool (monitoring) is=
<br>
&gt; &gt; tied to the attribute (including the point below about deleting t=
he<br>
&gt; &gt; BFD session). It doesn&#39;t have to be: the use of BFD should be=
<br>
&gt; &gt; independent of the bootstrapping mechanism.<br>
&gt; &gt;<br>
&gt; &gt; Do you consider other possible ways of bootstrapping the session<=
br>
&gt; &gt; valid? Would it be ok to use them to enable the use of BFD? Can a=
<br>
&gt; &gt; BFD session that is setup using a different mechanism used to mon=
itor<br>
&gt; &gt; the tunnel?<br>
&gt;<br>
&gt; GIM2&gt;&gt; Thank you for clarifying the question. Yes, a p2mp BFD se=
ssion can be<br>
&gt; instantiated using some other than the BFD Discriminator attribute met=
hod.<br>
&gt; draft-mirsky-mpls-p2mp-bfd gives several options and describes how MPL=
S LSP<br>
&gt; Ping can be used. But that method, in my opinion, has some operational=
<br>
&gt; issues and is less preferable compared to using an extension of a cont=
rol<br>
&gt; plane protocol. Other examples of extending a protocol to bootstrap a =
p2mp<br>
&gt; BFD session can be found in the draft.<br>
&gt;<br>
&gt; I&#39;ve added a note in the first paragraph of Section 3.1.6 to clari=
fy that<br>
&gt; the use of the BFD Discriminator attribute is optional:<br>
&gt;<br>
&gt; NEW TEXT:<br>
&gt; The P-tunnel status may be derived from the status of a multipoint<br>
&gt; BFD session [RFC8562] whose discriminator is advertised along with an<=
br>
&gt; x-PMSI A-D Route. A P2MP BFD session can be instantiated using a<br>
&gt; mechanism other than the BFD Discriminator attribute, e.g., MPLS LSP<b=
r>
&gt; Ping ([I-D.mirsky-mpls-p2mp-bfd]). Description of these methods is<br>
&gt; outside the scope of this document.<br>
<br>
Ok, that&#39;s fine.=C2=A0 See a related comment below (15).<br>
<br>
<br>
<br>
<br>
&gt; &gt; &gt; &gt; (2b) ...<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; BTW, I agree with Jeff in &gt; that bfd/idr should be given the o=
pportunity<br>
&gt; &gt; to review this document.<br>
&gt;<br>
&gt; GIM2&gt;&gt; I&#39;m leaving this decision to the AD and Chairs of BES=
S and BFD WGs.<br>
<br>
Yup.<br>
<br>
<br>
<br>
<br>
&gt; &gt; &gt; &gt; -------------------------------------------------------=
---------------<br>
&gt; &gt; &gt; &gt; COMMENT:<br>
&gt; &gt; &gt; &gt; -------------------------------------------------------=
---------------<br>
...<br>
&gt; &gt; &gt; &gt; (15) =C2=A73.1.6: &quot;The BFD Discriminator attribute=
 MUST be considered<br>
&gt; &gt; &gt; &gt; malformed if its length is not a non-zero multiple of f=
our.&quot; Ok,<br>
&gt; &gt; &gt; &gt; except that the specification of the attribute doesn&#3=
9;t mention the<br>
&gt; &gt; &gt; &gt; length (only the length of the TLVs). Please specify th=
e length...<br>
<br>
Don&#39;t forget to specify the length of the attribute.<br></blockquote><d=
iv>GIM3&gt;&gt; Resulting from the discussion with Jeff, the text we&#39;ve=
 agreed to is now as follows:</div><div>NEW TEXT:</div><div>=C2=A0 =C2=A0Th=
e BFD Discriminator attribute MUST be considered malformed if its</div>=C2=
=A0 =C2=A0length is smaller than five octets or if Optional TLVs are presen=
t,<br>=C2=A0 =C2=A0but not well-formed.<blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">
<br>
<br>
<br>
...<br>
&gt; &gt; All I want is for you to consider any potential implications of t=
he<br>
&gt; &gt; new attribute. The conclusion may be that no further change is<br=
>
&gt; &gt; needed.<br>
&gt;<br>
&gt; GIM2&gt;&gt; Thank you for further clarifying your comment. We are not=
 defining<br>
&gt; any extensions to the BFD Discriminator attribute and it may not be po=
ssible<br>
&gt; to imagine all the potential extensions that could be proposed in the<=
br>
&gt; future. It seems that it will be more appropriate to review the impact=
 of<br>
&gt; the specific extension of the BFD Discriminator attribute when it will=
 be<br>
&gt; proposed. At that time, we&#39;ll need to consider that excluding the =
BFD<br>
&gt; Discriminator attribute from an update will be interpreted as the remo=
val of<br>
&gt; the corresponding p2mp BFD session. That would not cause a switchover =
but<br>
&gt; just make MVPN failover to rely on the convergence of the BGP control =
plane.<br>
<br>
Fair enough.<br>
<br>
<br>
Two more comments (related, but different):<br>
<br>
(a) Being that the attribute (just like other attributes) is not<br>
protected, it can be removed in flight (for example, by a rogue node).<br>
As you mentioned, that action will not cause a switchover, but (from<br>
the end of =C2=A73.1.6) the BFD session will be deleted causing the tunnel<=
br>
to be left unmonitored.=C2=A0 There isn&#39;t much that can be done about t=
his,<br>
but it should be mentioned somewhere (maybe the Security<br>
Considerations section).<br>
<br>
(b) Back to my DISCUSS point about not needing the attribute to<br>
bootstrap the BFD session: =C2=A0If the BFD session is already up (maybe it=
<br>
was done using the attribute or maybe it was manually configured, it<br>
doesn&#39;t matter), then not including the attribute disables the<br>
monitoring, regardless of how the session was set up.=C2=A0 The last<br>
paragraph in =C2=A73.1.6 says this:<br>
<br>
=C2=A0 =C2=A0If the downstream PE&#39;s P-tunnel is already established, it=
s state<br>
=C2=A0 =C2=A0being monitored by the P2MP BFD session, and the downstream PE=
<br>
=C2=A0 =C2=A0receives the new x-PMSI A-D Route without the BFD Discriminato=
r<br>
=C2=A0 =C2=A0attribute, and the x-PMSI A-D Route was processed without any =
error<br>
=C2=A0 =C2=A0as per the relevant specifications, the downstream PE:<br>
<br>
I guess the intent was to say: &quot;if the BFD session was set up using<br=
>
the attribute and the attribute is not present anymore&quot;.=C2=A0 But the=
 text<br>
doesn&#39;t make that clarification, and a direct reading would result in<b=
r>
deleting the BFD session even if the attribute was not used.<br>
<br>
Suggestion&gt;<br>
=C2=A0 =C2=A0If the downstream PE&#39;s P-tunnel is already established, it=
s state being<br>
=C2=A0 =C2=A0monitored by the P2MP BFD session set up using the BFD Discrim=
inator<br>
=C2=A0 =C2=A0Attribute...<br></blockquote><div>GIM3&gt;&gt; Thank you for t=
he detailed and clear explanation. I&#39;ve used the suggested text.</div><=
div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
<br>
<br>
&gt; &gt; &gt; &gt; (17) ...<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; No -- the question is which address of the Upstream PE? I&#39;m a=
ssuming<br>
&gt; &gt; that an upstream PE can have several addresses, which one is to b=
e<br>
&gt; &gt; used? I can guess it is the address of the interface used to reac=
h<br>
&gt; &gt; the destination (or something like that)...but I would just want =
it to<br>
&gt; &gt; be clear.<br>
&gt;<br>
&gt; GIM2&gt;&gt; Thank you, I now better understand the question. It it th=
e PE address<br>
&gt; in the given VRF. I propose the following update:<br>
&gt;<br>
&gt; NEW TEXT:<br>
&gt; o MUST use its PE address as the source IP address when transmitting<b=
r>
&gt; BFD Control packets;<br>
<br>
I&#39;m not sure that &quot;PE address&quot; is the best clarification.=C2=
=A0 I&#39;ll let<br>
you figure it out. :-)<br></blockquote><div>GIM3&gt;&gt; RFC 6513 refers to=
 the Upstream PE Address. The PE Distinguisher Labels Attribute, defined in=
 RFC 6514, includes the PE Address field. BFD must use the same PE address.=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
&gt; Also, I think that the text in the next section that defines the proce=
ss on a<br>
&gt; downstream PE needs clarification. I propose to update text as follows=
:<br>
&gt; OLD TEXT:<br>
&gt; o MUST use the source IP address of the BFD Control packet, the<br>
&gt; value of the BFD Discriminator field, and the x-PMSI Tunnel<br>
&gt; Identifier [RFC6514] the BFD Control packet was received on to<br>
&gt; properly demultiplex BFD sessions.<br>
&gt; NEW TEXT:<br>
&gt; o to properly demultiplex BFD session MUST use:<br>
&gt;<br>
&gt; the address of the PE that included the BFD Discriminator<br>
&gt; attribute in the x-PMSI A-D Route;<br>
&gt;<br>
&gt; the value of the BFD Discriminator field in the BFD<br>
&gt; Discriminator attribute;<br>
&gt;<br>
&gt; the x-PMSI Tunnel Identifier [RFC6514] the BFD Control packet<br>
&gt; was received on.<br>
<br>
This looks good.<br></blockquote><div>GIM3&gt;&gt; Thank you.=C2=A0</div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
<br>
&gt; &gt; &gt; &gt; (18) =C2=A73.1.6.2(<a href=3D"http://3.1.6.2" rel=3D"no=
referrer" target=3D"_blank">http://3.1.6.2</a>): If the IP address doesn&#3=
9;t map correctly<br>
&gt; &gt; &gt; &gt; at the downstream PE (for example, a different local ad=
dress is used<br>
&gt; &gt; &gt; &gt; that doesn&#39;t correspond to the information in the P=
MSI attribute),<br>
&gt; &gt; &gt; &gt; what action should it take? Can the tunnel still be mon=
itored?<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; GIM&gt;&gt; There&#39;s a possibility that the same downstre=
am PE is monitoring<br>
&gt; &gt; &gt; more than one P-tunnel. Since each Upstream PE assigns its o=
wn BFD<br>
&gt; &gt; &gt; Discriminator, there&#39;s a chance that the same value is p=
icked by more<br>
&gt; &gt; &gt; than one Upstream PE.<br>
&gt; &gt; &gt; According to Section 5.7 of the RFC 8562:<br>
&gt; &gt; &gt; IP and MPLS multipoint tails MUST demultiplex BFD packets ba=
sed on a<br>
&gt; &gt; &gt; combination of the source address, My Discriminator, and the=
 identity<br>
&gt; &gt; &gt; of the multipoint path that the multipoint BFD Control packe=
t was<br>
&gt; &gt; &gt; received from. Together they uniquely identify the head of t=
he<br>
&gt; &gt; &gt; multipoint path.<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; We may consider adding the source address in the BFD Discrim=
inator<br>
&gt; &gt; &gt; attribute as an optional TLV. I think that might be a good e=
xtension<br>
&gt; &gt; &gt; that can be introduced in a new document.<br>
&gt; &gt;<br>
&gt; &gt; Why wait for a new document? You made a pretty good case for<br>
&gt; &gt; signaling the source address.<br>
&gt;<br>
&gt; GIM2&gt;&gt; I&#39;d like to defer this question to our AD and BESS WG=
 Chairs.<br>
<br>
Again, you made a good case for why it is needed for the mechanism to<br>
work.=C2=A0 Leaving it for later might just leave a hole.=C2=A0 Sure, let&#=
39;s hear<br>
from the Chairs/AD.<br>
<br>
<br>
<br>
<br>
...<br>
&gt; &gt; &gt; &gt; (23) ...<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; No, it doesn&#39;t. The text specifies that the update &quot;MUST=
 have the<br>
&gt; &gt; LOCAL_PREF attribute set to zero&quot;. The question is not about=
 the<br>
&gt; &gt; potential effect, but about the value being anything else (&gt; 0=
). Note<br>
&gt; &gt; that the value can be low enough (&gt; 0) and no adverse effect m=
ay take<br>
&gt; &gt; place, but the text doesn&#39;t specify a &quot;low value&quot;, =
it explicitly<br>
&gt; &gt; specifies 0.<br>
&gt;<br>
&gt; GIM2&gt;&gt; I think I see it better now. Would the following text wor=
k:<br>
&gt;<br>
&gt; NEW TEXT:<br>
&gt; For this purpose, routes that carry the Standby PE BGP<br>
&gt; Community MUST have the LOCAL_PREF attribute set to the value lower<br=
>
&gt; than the value specified as the LOCAL_PREF attribute for the route<br>
&gt; that does not carry the Standby PE BGP Community. The value of zero<br=
>
&gt; is RECOMMENDED.<br>
<br>
Yeah...I still have a problem with &quot;MUST have the LOCAL_PREF attribute=
<br>
set to the value lower than...&quot; because there&#39;s no practical way t=
o<br>
enforce that by the receiver: if the update with the community comes<br>
in first then now the receiver was to remember to check when the other<br>
update comes in later...<br>
<br>
s/MUST/must<br>
The &quot;RECOMMENDED&quot; part should be enough.<br></blockquote><div>GIM=
3&gt;&gt; Applied=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex">
<br>
<br>
&gt; Also, the text regarding setting the LOCAL_PREF after the switchover m=
ay<br>
&gt; need, in my view, the update to not require it is set to zero:<br>
&gt;<br>
&gt; NEW TEXT:<br>
&gt; The new Upstream PE MUST set the LOCAL_PREF attribute<br>
&gt; for that C-multicast route to the same value as when the Standby PE<br=
>
&gt; BGP Community was included in the advertisement.<br>
<br>
Same thing here: s/MUST/must<br></blockquote><div>GIM3&gt;&gt; Applied=C2=
=A0</div></div></div>

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From: Alvaro Retana <aretana.ietf@gmail.com>
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To: Greg Mirsky <gregimirsky@gmail.com>
Cc: "bfd-chairs@ietf.org" <bfd-chairs@ietf.org>, Stephane Litkowski <slitkows.ietf@gmail.com>,  "draft-ietf-bess-mvpn-fast-failover@ietf.org" <draft-ietf-bess-mvpn-fast-failover@ietf.org>,  "bess-chairs@ietf.org" <bess-chairs@ietf.org>, The IESG <iesg@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] Alvaro Retana's Discuss on draft-ietf-bess-mvpn-fast-failover-13: (with DISCUSS and COMMENT)
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On December 23, 2020 at 1:51:13 PM, Greg Mirsky wrote:


Greg:

I have just one reply. =C2=A0I am also leaving in the text where we're
waiting for Chair/AD input.


Thanks!!

Alvaro.


...
> > > Method described in Section 3.1.2 monitors the state of the data
> > > plane but only for an egress P-PE link of a P-tunnel. As a result,
> > > network failures that affect upstream links might not be detected
> > > using this method and the MVPN convergence would be determined by the
> > > convergence of the BGP control plane.
> >
> > "...would be determined by the convergence of the BGP control plane."
> >
> > This is a case where it seems that combining =C2=A73.1.1/=C2=A73.1.2 wo=
uld make
> > sense. In fact, tracking the state of the root seems helpful in other
> > cases too (below) that are looking at different things. You said
> > before that you didn't think combining the methods make sense -- can
> > you please explain why in this section?
>
> GIM3>> But that would be my personal opinion that the WG might not agree.
> I'm always glad to discuss technical ideas, pros, and contras of that or
> this approach to solve the problem but I feel uneasy adding my personal
> opinions in the WG document. The document lists a set of techniques but h=
ow
> they are combined in a product is left for product managers and developer=
s
> to decide.
> Would you agree?

The document already talks about combinations, specifically with root track=
ing.

The text above already mentions "convergence of the BGP control
plane", which I think makes direct reference to root tracking. =C2=A0=C2=A7=
3.1.3
and =C2=A73.1.4 both say that "the downstream PE can immediately update its
UMH when the reachability condition changes" -- this is the exact same
text used in =C2=A73.1.1 to describe root tracking.

The opinion of not combining is already not represented in the text,
and there is direct reference to using an additional method. =C2=A0If you
didn't mean to use the same text to refer to different things then
perhaps some clarification would be in order.




...
> > > > > > (2b) ...
> > > > > >
> > > > BTW, I agree with Jeff in > that bfd/idr should be given the opport=
unity
> > > > to review this document.
> > >
> > > GIM2>> I'm leaving this decision to the AD and Chairs of BESS and BFD=
 WGs.
> >
> > Yup.

...
> > > > > > (18) =C2=A73.1.6.2(http://3.1.6.2): If the IP address doesn't m=
ap
> > > > > > correctly at the downstream PE (for example, a different local
> > > > > > address is used that doesn't correspond to the information in t=
he
> > > > > > PMSI attribute), what action should it take? Can the tunnel sti=
ll
> > > > > > be monitored?
> > > > >
> > > > > GIM>> There's a possibility that the same downstream PE is monito=
ring
> > > > > more than one P-tunnel. Since each Upstream PE assigns its own BF=
D
> > > > > Discriminator, there's a chance that the same value is picked by =
more
> > > > > than one Upstream PE.
> > > > > According to Section 5.7 of the RFC 8562:
> > > > > IP and MPLS multipoint tails MUST demultiplex BFD packets based o=
n a
> > > > > combination of the source address, My Discriminator, and the iden=
tity
> > > > > of the multipoint path that the multipoint BFD Control packet was
> > > > > received from. Together they uniquely identify the head of the
> > > > > multipoint path.
> > > > >
> > > > > We may consider adding the source address in the BFD Discriminato=
r
> > > > > attribute as an optional TLV. I think that might be a good extens=
ion
> > > > > that can be introduced in a new document.
> > > >
> > > > Why wait for a new document? You made a pretty good case for
> > > > signaling the source address.
> > >
> > > GIM2>> I'd like to defer this question to our AD and BESS WG Chairs.
> >
> > Again, you made a good case for why it is needed for the mechanism to
> > work. Leaving it for later might just leave a hole. Sure, let's hear
> > from the Chairs/AD.


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Benjamin Kaduk has entered the following ballot position for
draft-ietf-bess-mvpn-fast-failover-14: No Objection

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email addresses included in the To and CC lines. (Feel free to cut this
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The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Thank you for addressing my discuss (and comment!) points.

Given what I have read so far in Alvaro's ballot thread, I had expected
the Reserved field to be removed from the BFD Discriminator attribute
format, but I will let that play out in Alvaro's ballot thread.




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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 23 Dec 2020 17:59:57 -0800
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Cc: The IESG <iesg@ietf.org>, draft-ietf-bess-mvpn-fast-failover@ietf.org,  bess-chairs@ietf.org, BESS <bess@ietf.org>,  Stephane Litkowski <slitkows.ietf@gmail.com>
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Subject: Re: [bess] Benjamin Kaduk's No Objection on draft-ietf-bess-mvpn-fast-failover-14: (with COMMENT)
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--000000000000d53fcf05b72c2ab2
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Hi Ben,
happy Holidays!
The Reserved field, resulting from our discussion with Jeff Haas, is gone
in the working version of the document:

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+
      |    BFD Mode   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                       BFD Discriminator                       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      ~                         Optional TLVs                         ~
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


Thank you for your comments and discussion.

Regards,
Greg


On Wed, Dec 23, 2020 at 4:52 PM Benjamin Kaduk via Datatracker <
noreply@ietf.org> wrote:

> Benjamin Kaduk has entered the following ballot position for
> draft-ietf-bess-mvpn-fast-failover-14: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Thank you for addressing my discuss (and comment!) points.
>
> Given what I have read so far in Alvaro's ballot thread, I had expected
> the Reserved field to be removed from the BFD Discriminator attribute
> format, but I will let that play out in Alvaro's ballot thread.
>
>
>
>

--000000000000d53fcf05b72c2ab2
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr">Hi Ben,<div>happy Holidays!</div><div>The Reserved field, =
resulting from our discussion with Jeff Haas, is gone in the working versio=
n of the document:</div><div><pre style=3D"color:rgb(0,0,0);white-space:pre=
-wrap">       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+
      |    BFD Mode   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                       BFD Discriminator                       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      ~                         Optional TLVs                         ~
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

</pre>Thank you for your comments and discussion.</div><div><br></div><div>=
Regards,</div><div>Greg</div><div><br></div></div><br><div class=3D"gmail_q=
uote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Dec 23, 2020 at 4:52 PM=
 Benjamin Kaduk via Datatracker &lt;<a href=3D"mailto:noreply@ietf.org">nor=
eply@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex">Benjamin Kaduk has entered the following ballot position for<b=
r>
draft-ietf-bess-mvpn-fast-failover-14: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tatement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failo=
ver/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc=
/draft-ietf-bess-mvpn-fast-failover/</a><br>
<br>
<br>
<br>
----------------------------------------------------------------------<br>
COMMENT:<br>
----------------------------------------------------------------------<br>
<br>
Thank you for addressing my discuss (and comment!) points.<br>
<br>
Given what I have read so far in Alvaro&#39;s ballot thread, I had expected=
<br>
the Reserved field to be removed from the BFD Discriminator attribute<br>
format, but I will let that play out in Alvaro&#39;s ballot thread.<br>
<br>
<br>
<br>
</blockquote></div>

--000000000000d53fcf05b72c2ab2--


From nobody Mon Dec 28 17:26:13 2020
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From: Lizhenbin <lizhenbin@huawei.com>
To: "slitkows.ietf@gmail.com" <slitkows.ietf@gmail.com>, "draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org" <draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org>, "bess@ietf.org" <bess@ietf.org>
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Hi All,
I support the publication of the draft.

I am not aware of any non-disclosed IPR except the one has been announced.


Best Regards,
Zhenbin (Robin)




From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of slitkows.ietf@gmail.=
com
Sent: Friday, December 11, 2020 11:53 PM
To: draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: [bess] WG Last Call, IPR and Implementation Poll for draft-ietf-be=
ss-mvpn-evpn-aggregation-label-04

This email starts a two-week working group last call for draft-ietf-bess-mv=
pn-evpn-aggregation-label-04 [1]

Please review the draft and send any comments to the BESS list. Also, pleas=
e indicate if you support publishing the draft as a standards track RFC.

This poll runs until the 28th December 2020

We are also polling for knowledge of any undisclosed IPR that applies to th=
is Document, to ensure that IPR has been disclosed in compliance with IETF =
IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).

If you are listed as an Author or a Contributor of this document please res=
pond to this email and indicate whether or not you are aware of any relevan=
t undisclosed IPR. The Document won't progress without answers from all the=
 Authors and Contributors.
There is currently one IPR disclosure.

In addition, we are polling for knowledge of implementations of this draft,=
 per the BESS policy in [2].

Thank you,
Matthew & Stephane


[1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-evpn-aggregation-=
label/
[2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw


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<body lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Hi All,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I support the publication of the draft=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I am not aware of any non-disclosed IP=
R except the one has been announced.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Best Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Zhenbin (Robin)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp=
;</o:p></span></a></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;ms=
o-fareast-language:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"fon=
t-size:11.0pt;mso-fareast-language:ZH-CN"> BESS [mailto:bess-bounces@ietf.o=
rg]
<b>On Behalf Of </b>slitkows.ietf@gmail.com<br>
<b>Sent:</b> Friday, December 11, 2020 11:53 PM<br>
<b>To:</b> draft-ietf-bess-mvpn-evpn-aggregation-label@ietf.org; bess@ietf.=
org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> [bess] WG Last Call, IPR and Implementation Poll for draft-=
ietf-bess-mvpn-evpn-aggregation-label-04<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This email starts a two-week working group last call for&=
nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-language:=
EN-GB">draft-ietf-bess-mvpn-evpn-aggregation-label-04
 [1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">Please review the draft and send any comments to the BESS=
 list. Also, please indicate if you support publishing the draft as a stand=
ards track RFC.</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">This&nbsp;poll&nbsp;runs until the 28<sup>th</sup> Decemb=
er 2020</span><span lang=3D"EN-GB" style=3D"color:black;mso-fareast-languag=
e:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black;mso-fareas=
t-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=3D"color:black;ms=
o-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">We are also&nbsp;polling for knowledge of any undisclosed=
&nbsp;IPR&nbsp;that applies to this Document, to ensure that&nbsp;IPR&nbsp;=
has been disclosed in compliance with IETF&nbsp;IPR&nbsp;rules (see RFCs
 3979, 4879, 3669 and 5378 for more details).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB">If you are listed as an Author or a Contributor of this d=
ocument please respond to this email and indicate whether or not you are aw=
are of any relevant undisclosed&nbsp;IPR. The
 Document won't progress without answers from all the Authors and Contribut=
ors.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">There is currently one&nbsp;IPR&nbsp;dis=
closure.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">In addition, we are polling for knowledg=
e of implementations</span><span lang=3D"EN-US">
</span><span lang=3D"EN-US" style=3D"font-size:11.0pt;color:black;mso-farea=
st-language:EN-GB">of this draft, per the BESS policy in [2]. &nbsp;&nbsp;<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black;mso-fareas=
t-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Thank you,</span><span lang=3D"EN-GB" st=
yle=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">Matthew &amp; Stephane</span><span lang=
=3D"EN-GB" style=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB">&nbsp;</span><span lang=3D"EN-GB" style=
=3D"color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">&nbsp;</s=
pan><span lang=3D"EN-GB" style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"caret-color: rgb(0, 0, 0);font-variant-caps=
: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adju=
st: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span lang=3D"EN-US" style=3D"color:black">[1]<span class=3D"apple-converte=
d-space">&nbsp;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-=
mvpn-evpn-aggregation-label/">https://datatracker.ietf.org/doc/draft-ietf-b=
ess-mvpn-evpn-aggregation-label/</a>
</span></span><span class=3D"apple-converted-space"><span lang=3D"EN-US"><o=
:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">[2]<span =
class=3D"apple-converted-space">&nbsp;</span><a href=3D"https://mailarchive=
.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw" target=3D"_blank" titl=
e=3D"https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw=
">https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a=
></span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><o:p=
>&nbsp;</o:p></span></p>
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