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Date: Sun, 2 Dec 2018 18:20:57 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Eric Rosen <erosen@juniper.net>
Cc: The IESG <iesg@ietf.org>, "draft-ietf-bess-mvpn-expl-track@ietf.org" <draft-ietf-bess-mvpn-expl-track@ietf.org>,  "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
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References: <154352912422.26019.11045526919398221329.idtracker@ietfa.amsl.com> <c6c2b01d-ee17-b556-cf18-b0ef3ecd9186@juniper.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/UIrbmU7qhlwESshvr7cMRKqhcrQ>
Subject: Re: [bess] Benjamin Kaduk's Discuss on draft-ietf-bess-mvpn-expl-track-13: (with DISCUSS and COMMENT)
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On Fri, Nov 30, 2018 at 04:23:36PM +0000, Eric Rosen wrote:
> On 11/29/2018 5:05 PM, Benjamin Kaduk wrote:
> > The updates in the -13 include new Updates headers for RFCs 7582 and 7900,
> > which may or may not call for additional IESG eyes on the changes.  Just from
> > looking at the diff, it's not entirely clear to me what about those documents is
> > being updated.
> 
> In Alvaro's comments, he explicitly asked me to put 7582 and 7900 in the 
> "Updates" header.
> 
> His reasoning was based on the the following text (which is unchanged 
> from the previous version) from Section 3:
> 
>     The rules for finding a "match for reception" in [RFC6625] are hereby
>     modified as follows:
> 
>        When applying the rules of Section 3.2.1 or 3.2.2 of [RFC6625], it
>        is REQUIRED to ignore any S-PMSI A-D route that has no PTA, or
>        whose PTA specifies "no tunnel information present".
> 
>     There are other RFCs that update [RFC6625] and that modify the rules
>     for finding a "match for reception".  See, e.g., [RFC7582] and
>     [RFC7900].  When applying those modified rules, it is REQUIRED to
>     ignore any S-PMSI A-D route that has no PTA, or whose PTA specifies
>     "no tunnel information present".

Ah, I see it now...

> Alvaro's comment was:
> 
> "This text is also Updating rfc7582 and rfc7900 (and others?) that Updated
> rfc6625.  This document should then be marked to Update those other RFCs
> explicitly."
> 
> This comment seems reasonable to me, but if you two would like to fight 
> it out, just let me know the resolution ;-)

...and apparently had completely forgotten about Alvaro's remark.

I'll go clear now, but will leave a mention of
https://mailarchive.ietf.org/arch/msg/ietf/-1u_1-peHKAmUDuLyGAJYu0fPCE for
reasons why one might want (or not want) to explicitly say things like
"this document Updates RFC XXXX by YYY".  As a non-blocking comment, of
course.

-Benjamin


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From: <stephane.litkowski@orange.com>
To: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment 
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Date: Mon, 3 Dec 2018 10:43:14 +0000
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Subject: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Hello Working Group,



This email starts a two-week Working Group Last Call on draft-ietf-bess-evp=
n-virtual-eth-segment [1]



This poll runs until *the 17th of December*.



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 no IPR disclosed.



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.



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



    Thank you,

    Stephane & Matthew



    [1] https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-s=
egment/



    [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw



___________________________________________________________________________=
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<p class=3D"MsoPlainText">Hello Working Group,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">This email starts a two-week Working Group Last C=
all on draft-ietf-bess-evpn-virtual-eth-segment [1]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">This poll runs until *the 17th of December*.<o:p>=
</o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for knowledge of any undisclo=
sed IPR that applies to this Document, to ensure that IPR has been disclose=
d in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for=
 more details).<o:p></o:p></p>
<p class=3D"MsoPlainText">If you are listed as an Author or a Contributor o=
f this Document please respond to this email and indicate whether or not yo=
u are aware of any relevant undisclosed IPR. The Document won't progress wi=
thout answers from all the Authors
 and Contributors.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">There is currently no IPR disclosed.&nbsp;&nbsp;<=
o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">If you are not listed as an Author or a Contribut=
or, then please explicitly respond only if you are aware of any IPR that ha=
s not yet been disclosed in conformance with IETF rules.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for any existing implementati=
on as per [2].
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;Thank you,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; Stephane &amp; Matthew<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;[1] <a href=3D"https://da=
tatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/">
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/<=
/a><o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; [2] <a href=3D"https://mailarc=
hive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<PRE>______________________________________________________________________=
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From nobody Mon Dec  3 09:37:19 2018
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Cc: The IESG <iesg@ietf.org>, stephane.litkowski@orange.com, draft-ietf-bess-mvpn-expl-track@ietf.org, martin.vigoureux@nokia.com, bess-chairs@ietf.org, bess@ietf.org, rfc-editor@rfc-editor.org
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Date: Mon, 03 Dec 2018 09:37:12 -0800
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Subject: [bess] Protocol Action: 'Explicit Tracking with Wild Card Routes in Multicast VPN' to Proposed Standard (draft-ietf-bess-mvpn-expl-track-13.txt)
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The IESG has approved the following document:
- 'Explicit Tracking with Wild Card Routes in Multicast VPN'
  (draft-ietf-bess-mvpn-expl-track-13.txt) as Proposed Standard

This document is the product of the BGP Enabled ServiceS Working Group.

The IESG contact persons are Alvaro Retana, Deborah Brungard and Martin
Vigoureux.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-expl-track/





Technical Summary

  This document clarifies the explicit tracking procedures in Multicast VPNs.
  The existing documents are leaving ambiguity  for some scenarios that are clarified by this document.
  In addition, the document provides new optimized procedures to request explicit tracking of individual flows when wildcard S-PMSIs are used.

Working Group Summary

  There was no real controversy on this document. Some technical points have been discussed
  and resolved with the WG consensus.

Document Quality

  There is no implementation yet.
  The draft-ietf-bier-mvpn has a normative dependency with this document.
  There was no opposition in the WG to progress the document without implementations
  to help the BIER document progressing.

Personnel

  Stephane Litkowski is the document shepherd.
  Martin Vigoureux is the responsible Area Director.


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From: Zhuangshunwan <zhuangshunwan@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
CC: "draft-liu-bess-mvpn-yang@ietf.org" <draft-liu-bess-mvpn-yang@ietf.org>
Thread-Topic: Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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Date: Tue, 4 Dec 2018 01:29:51 +0000
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Subject: Re: [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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From: Mahesh Sivakumar <sivakumar.mahesh@gmail.com>
Date: Tue, 4 Dec 2018 07:55:48 +0530
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To: matthew.bocci@nokia.com
Cc: bess@ietf.org, draft-liu-bess-mvpn-yang@ietf.org
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Subject: Re: [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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Support adoption as a co-author. I'm not aware of any IPR.

Thanks
Mahesh

On Mon, Dec 3, 2018 at 8:22 PM Bocci, Matthew (Nokia - GB) <
matthew.bocci@nokia.com> wrote:

> This email begins a two-week poll for adoption of
> draft-liu-bess-mvpn-yang-07.txt
>
>
>
> 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 won't
> progress without answers from all the authors and contributors.
>
> Currently there is one IPR declaration 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 Monday 17th December 2018.
>
>
>
> Regards,
>
> Matthew
>
>
>
>
>

--000000000000a7c9ed057c28fc6b
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<div dir=3D"ltr">Support adoption as a co-author. I&#39;m not aware of any =
IPR.<div><br></div><div>Thanks</div><div>Mahesh</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr">On Mon, Dec 3, 2018 at 8:22 PM Bocci, Mat=
thew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocci@nokia.com">matthew.bo=
cci@nokia.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_-4886703653221264051WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">This em=
ail begins a two-week poll for adoption of
</span><span style=3D"font-size:11.0pt;color:black">draft-liu-bess-mvpn-yan=
g-07.txt<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">=C2=A0<=
/span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">Please =
review the draft and post any comments to the BESS working group list.</spa=
n><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">=C2=A0<=
/span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">We are =
also=C2=A0polling for knowledge of any undisclosed IPR that applies to this=
 Document, to ensure that IPR has been disclosed in compliance with IETF IP=
R rules (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"font-size:11.0pt;color:black">If you =
are listed as an author or a contributor of this document, please respond t=
o this email and indicate whether or not you are aware of any relevant undi=
sclosed IPR, copying the BESS mailing
 list. The document won&#39;t progress without answers from all the authors=
 and contributors.</span><span style=3D"color:black"><u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">Current=
ly there is one IPR declaration against this document.</span><span style=3D=
"color:black"><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"font-size:11.0pt;color:black">If you =
are not listed as an author or a contributor, then please explicitly respon=
d only if you are aware of any IPR that has not yet been disclosed in confo=
rmance with IETF rules.</span><span style=3D"color:black"><u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">This po=
ll for adoption closes on Monday 17<sup>th</sup> December 2018. =C2=A0</spa=
n><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">=C2=A0<=
/span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">Regards=
,</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">Matthew=
 </span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:black">=C2=A0<=
/span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>

</blockquote></div>

--000000000000a7c9ed057c28fc6b--


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From: <stephane.litkowski@orange.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
CC: "draft-liu-bess-mvpn-yang@ietf.org" <draft-liu-bess-mvpn-yang@ietf.org>
Thread-Topic: Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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Date: Tue, 4 Dec 2018 08:41:47 +0000
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Subject: Re: [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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From nobody Tue Dec  4 06:05:49 2018
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Subject: [bess] Last Call: <draft-ietf-bess-evpn-vpls-seamless-integ-05.txt> ((PBB-)EVPN Seamless Integration with (PBB-)VPLS) to Proposed Standard
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The IESG has received a request from the BGP Enabled ServiceS WG (bess) to
consider the following document: - '(PBB-)EVPN Seamless Integration with
(PBB-)VPLS'
  <draft-ietf-bess-evpn-vpls-seamless-integ-05.txt> as Proposed Standard

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
ietf@ietf.org mailing lists by 2018-12-18. 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


   This draft specifies procedures for backward compatibility of
   Ethernet VPN (EVPN) and Provider Backbone Bridge Ethernet VPN (PBB-
   EVPN) solutions with Virtual Private LAN Service (VPLS) and Provider
   Backbone Bridge VPLS (PBB-VPLS) solutions (PBB-)VPLS. It also
   provides mechanisms for seamless integration of these two
   technologies in the same MPLS/IP network on a per-VPN-instance basis.
   Implementation of this draft enables service providers to introduce
   (PBB-)EVPN PEs in their brown-field deployments of (PBB-)VPLS
   networks.





The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-vpls-seamless-integ/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-vpls-seamless-integ/ballot/

The following IPR Declarations may be related to this I-D:

   https://datatracker.ietf.org/ipr/2472/






From nobody Tue Dec  4 09:30:21 2018
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-df-election-framework-06.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           : Framework for EVPN Designated Forwarder Election Extensibility
        Authors         : Jorge Rabadan
                          Satya Mohanty
                          Ali Sajassi
                          John Drake
                          Kiran Nagaraj
                          Senthil Sathappan
	Filename        : draft-ietf-bess-evpn-df-election-framework-06.txt
	Pages           : 27
	Date            : 2018-12-04

Abstract:
   The Designated Forwarder (DF) in EVPN networks is the Provider Edge
   (PE) router responsible for sending broadcast, unknown unicast and
   multicast (BUM) traffic to a multi-homed Customer Equipment (CE)
   device, on a given VLAN on a particular Ethernet Segment (ES). The DF
   is selected out of a list of candidate PEs that advertise the same
   Ethernet Segment Identifier (ESI) to the EVPN network. By default,
   EVPN uses a DF Election algorithm referred to as "Service Carving"
   and it is based on a modulus function (V mod N) that takes the number
   of PEs in the ES (N) and the VLAN value (V) as input. This default DF
   Election algorithm has some inefficiencies that this document
   addresses by defining a new DF Election algorithm and a capability to
   influence the DF Election result for a VLAN, depending on the state
   of the associated Attachment Circuit (AC). In addition, this document
   creates a registry with IANA, for future DF Election Algorithms and
   Capabilities. It also presents a formal definition and clarification
   of the DF Election Finite State Machine.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-df-election-framework-06
https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-df-election-framework-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-df-election-framework-06


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: "Vigoureux, Martin (Nokia - FR/Paris-Saclay)" <martin.vigoureux@nokia.com>
To: "bess@ietf.org" <bess@ietf.org>
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Thread-Topic: PLEASE LOOK: minor change to draft-ietf-bess-evpn-df-election-framework-05 => two weeks poll to get feedback
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Date: Tue, 4 Dec 2018 18:44:30 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/yE3K2wKA2FrBnmjD0mhVGUKhMC4>
Subject: Re: [bess] PLEASE LOOK: minor change to draft-ietf-bess-evpn-df-election-framework-05 => two weeks poll to get feedback
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Date: Tue, 4 Dec 2018 19:52:49 +0000
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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From nobody Tue Dec  4 12:02:49 2018
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From: IETF Secretariat <ietf-secretariat-reply@ietf.org>
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Subject: [bess] The BESS WG has placed draft-sajassi-bess-evpn-virtual-eth-segment in state "Adopted by a WG"
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The BESS WG has placed draft-sajassi-bess-evpn-virtual-eth-segment in state
Adopted by a WG (entered by Stephane Litkowski)

The document is available at
https://datatracker.ietf.org/doc/draft-sajassi-bess-evpn-virtual-eth-segment/


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From: <stephane.litkowski@orange.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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From nobody Tue Dec  4 13:09:35 2018
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Subject: [bess] I-D Action: draft-ietf-bess-service-chaining-06.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           : Service Function Chaining using Virtual Networks with BGP VPNs
        Authors         : Rex Fernando
                          Stuart Mackie
                          Dhananjaya Rao
                          Bruno Rijsman
                          Maria Napierala
                          Thomas Morin
	Filename        : draft-ietf-bess-service-chaining-06.txt
	Pages           : 41
	Date            : 2018-12-04

Abstract:
   This document describes how service function chains (SFC) can be
   applied to traffic flows using routing in a virtual (overlay) network
   to steer traffic between service nodes.  Chains can include services
   running in routers, on physical appliances or in virtual machines.
   Service chains have applicability at the subscriber edge, business
   edge and in multi-tenant datacenters.  The routing function into SFCs
   and between service functions within an SFC can be performed by
   physical devices (routers), be virtualized inside hypervisors, or run
   as part of a host OS.

   A BGP control plane for route distribution is used to create virtual
   networks implemented using IP MPLS, VXLAN or other suitable
   encapsulation, where the routes within the virtual networks cause
   traffic to flow through a sequence of service nodes that apply packet
   processing functions to the flows.

   Two techniques are described: in one the service chain is implemented
   as a sequence of distinct VPNs between sets of service nodes that
   apply each service function; in the other, the routes within a VPN
   are modified through the use of special route targets and modified
   next-hop resolution to achieve the desired result.

   In both techniques, service chains can be created by manual
   configuration of routes and route targets in routing systems, or
   through the use of a controller which contains a topological model of
   the desired service chains.

   This document also contains discussion of load balancing between
   network functions, symmetric forward and reverse paths when stateful
   services are involved, and use of classifiers to direct traffic into
   a service chain.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-service-chaining/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-service-chaining-06
https://datatracker.ietf.org/doc/html/draft-ietf-bess-service-chaining-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-service-chaining-06


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 Tue Dec  4 14:10:23 2018
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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Tue, 4 Dec 2018 17:10:08 -0500
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To: bess@ietf.org, draft-ietf-bess-service-chaining@ietf.org
Cc: draft-ietf-mpls-sfc-encapsulation@ietf.org
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Subject: [bess] Comment on draft-ietf-bess-service-chaining-06
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--000000000000f641cd057c3987a6
Content-Type: text/plain; charset="UTF-8"

I just read the new revision of draft-ietf-bess-service-chaining. Although
the draft doesn't use the RFC 8300 NSH, it could very easily take advantage
of features provided by the NSH (such as metadata) by adding NSH over MPLS
as defined in draft-ietf-mpls-sfc-encapsulation to the list of
encapsulations listed in section 2.5. And this draft provides an excellent
label distribution mechanism for NSH over MPLS. It would make a lot of
sense to add a reference to draft-ietf-mpls-sfc-encapsulation in the list
of encapsulations in section 2.5.

Thanks,
Andy

--000000000000f641cd057c3987a6
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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">I just =
read the new revision of=C2=A0draft-ietf-bess-service-chaining. Although th=
e draft doesn&#39;t use the RFC 8300 NSH, it could very easily take advanta=
ge of features provided by the NSH (such as metadata) by adding NSH over MP=
LS as defined in=C2=A0draft-ietf-mpls-sfc-encapsulation to the list of enca=
psulations listed in section 2.5. And this draft provides an excellent labe=
l distribution mechanism for NSH over MPLS. It would make a lot of sense to=
 add a reference to=C2=A0draft-ietf-mpls-sfc-encapsulation in the list of e=
ncapsulations in section 2.5.</div><div dir=3D"ltr"><br></div><div>Thanks,<=
/div><div>Andy</div><div><br></div></div></div></div>

--000000000000f641cd057c3987a6--


From nobody Tue Dec  4 16:57:23 2018
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CC: stephane.litkowski@orange.com, martin.vigoureux@nokia.com, draft-ietf-bess-evpn-df-election-framework@ietf.org, bess-chairs@ietf.org, bess@ietf.org, Stephane Litkowski <stephane.litkowski@orange.com>
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Date: Tue, 04 Dec 2018 16:57:08 -0800
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Subject: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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The IESG has received a request from the BGP Enabled ServiceS WG (bess) to
consider the following document: - 'Framework for EVPN Designated Forwarder
Election Extensibility'
  <draft-ietf-bess-evpn-df-election-framework-06.txt> as Proposed Standard

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
ietf@ietf.org mailing lists by 2018-12-18. 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 Designated Forwarder (DF) in EVPN networks is the Provider Edge
   (PE) router responsible for sending broadcast, unknown unicast and
   multicast (BUM) traffic to a multi-homed Customer Equipment (CE)
   device, on a given VLAN on a particular Ethernet Segment (ES). The DF
   is selected out of a list of candidate PEs that advertise the same
   Ethernet Segment Identifier (ESI) to the EVPN network. By default,
   EVPN uses a DF Election algorithm referred to as "Service Carving"
   and it is based on a modulus function (V mod N) that takes the number
   of PEs in the ES (N) and the VLAN value (V) as input. This default DF
   Election algorithm has some inefficiencies that this document
   addresses by defining a new DF Election algorithm and a capability to
   influence the DF Election result for a VLAN, depending on the state
   of the associated Attachment Circuit (AC). In addition, this document
   creates a registry with IANA, for future DF Election Algorithms and
   Capabilities. It also presents a formal definition and clarification
   of the DF Election Finite State Machine.





The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/ballot/


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





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From: Xiejingrong <xiejingrong@huawei.com>
To: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>, "bess@ietf.org" <bess@ietf.org>
CC: "draft-liu-bess-mvpn-yang@ietf.org" <draft-liu-bess-mvpn-yang@ietf.org>
Thread-Topic: Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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Date: Wed, 5 Dec 2018 09:53:22 +0000
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Subject: Re: [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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From: John E Drake <jdrake@juniper.net>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/0mehTgoUV8zEk36SVZPWZElZ4Bk>
Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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--_000_BN7PR05MB43545CCC16C24BEEE3B39850C7A80BN7PR05MB4354namp_
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Support, Juniper has supported this feature for an eternity, not aware of a=
ny IPR

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com
Sent: Monday, December 3, 2018 5:43 AM
To: bess@ietf.org
Subject: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-=
virtual-eth-segment


Hello Working Group,



This email starts a two-week Working Group Last Call on draft-ietf-bess-evp=
n-virtual-eth-segment [1]



This poll runs until *the 17th of December*.



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 no IPR disclosed.



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.



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



    Thank you,

    Stephane & Matthew



    [1] https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-s=
egment/<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.=
ietf.org_doc_draft-2Dietf-2Dbess-2Devpn-2Dvirtual-2Deth-2Dsegment_&d=3DDwMF=
Ag&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DCRB2tJiQePk0cT-h5LGh=
EWH-s_xXXup3HzvBSMRj5VE&m=3DP_r69CctJ_1IyO9GtR7N-QkGdTeoT-2zRsLIi57GgIU&s=
=3DyA_JRmjUxOUkw0lMd6i8maFkQaLLuSGxpsAejOjPccQ&e=3D>



    [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__mailarchive.ietf=
.org_arch_msg_bess_cG3X1tTqb-5FvPC4rg56SEdkjqDpw&d=3DDwMFAg&c=3DHAkYuh63rsu=
hr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DCRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSM=
Rj5VE&m=3DP_r69CctJ_1IyO9GtR7N-QkGdTeoT-2zRsLIi57GgIU&s=3D7SM7Pls8TwqMWQYYD=
V1MRIOL39jI-yh6rTiTwoCHiV0&e=3D>



___________________________________________________________________________=
______________________________________________



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<p class=3D"MsoNormal">Support, Juniper has supported this feature for an e=
ternity, not aware of any IPR<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Yours Irrespectively,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">John<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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0in 0in">
<p class=3D"MsoNormal"><b>From:</b> BESS [mailto:bess-bounces@ietf.org] <b>=
On Behalf Of
</b>stephane.litkowski@orange.com<br>
<b>Sent:</b> Monday, December 3, 2018 5:43 AM<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] WGLC, IPR and implementation poll for draft-ietf-bes=
s-evpn-virtual-eth-segment<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Hello Working Group,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">This email starts a two-week Working Group Last C=
all on draft-ietf-bess-evpn-virtual-eth-segment [1]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">This poll runs until *the 17th of December*.<o:p>=
</o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for knowledge of any undisclo=
sed IPR that applies to this Document, to ensure that IPR has been disclose=
d in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for=
 more details).<o:p></o:p></p>
<p class=3D"MsoPlainText">If you are listed as an Author or a Contributor o=
f this Document please respond to this email and indicate whether or not yo=
u are aware of any relevant undisclosed IPR. The Document won't progress wi=
thout answers from all the Authors
 and Contributors.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">There is currently no IPR disclosed.&nbsp;&nbsp;<=
o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">If you are not listed as an Author or a Contribut=
or, then please explicitly respond only if you are aware of any IPR that ha=
s not yet been disclosed in conformance with IETF rules.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for any existing implementati=
on as per [2].
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;Thank you,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; Stephane &amp; Matthew<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;[1] <a href=3D"https://ur=
ldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc_draft=
-2Dietf-2Dbess-2Devpn-2Dvirtual-2Deth-2Dsegment_&amp;d=3DDwMFAg&amp;c=3DHAk=
Yuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DCRB2tJiQePk0cT-h5LGhEWH-s_=
xXXup3HzvBSMRj5VE&amp;m=3DP_r69CctJ_1IyO9GtR7N-QkGdTeoT-2zRsLIi57GgIU&amp;s=
=3DyA_JRmjUxOUkw0lMd6i8maFkQaLLuSGxpsAejOjPccQ&amp;e=3D">
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/<=
/a><o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; [2] <a href=3D"https://urldefe=
nse.proofpoint.com/v2/url?u=3Dhttps-3A__mailarchive.ietf.org_arch_msg_bess_=
cG3X1tTqb-5FvPC4rg56SEdkjqDpw&amp;d=3DDwMFAg&amp;c=3DHAkYuh63rsuhr6Scbfh0Uj=
BXeMK-ndb3voDTXcWzoCI&amp;r=3DCRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&a=
mp;m=3DP_r69CctJ_1IyO9GtR7N-QkGdTeoT-2zRsLIi57GgIU&amp;s=3D7SM7Pls8TwqMWQYY=
DV1MRIOL39jI-yh6rTiTwoCHiV0&amp;e=3D">
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
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<pre>Thank you.<o:p></o:p></pre>
</div>
</div>
</body>
</html>

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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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It=92s an important document. I support its publication as coauthor. Not aw=
are of any IPR. Nokia has an implementation for a while now.
Thanks,
Jorge


________________________________
From: BESS <bess-bounces@ietf.org> on behalf of stephane.litkowski@orange.c=
om
Sent: Monday, December 3, 2018 14:43
To: bess@ietf.org
Subject: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-=
virtual-eth-segment


Hello Working Group,



This email starts a two-week Working Group Last Call on draft-ietf-bess-evp=
n-virtual-eth-segment [1]



This poll runs until *the 17th of December*.



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 no IPR disclosed.



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.



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



    Thank you,

    Stephane & Matthew



    [1] https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-s=
egment/



    [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw



___________________________________________________________________________=
______________________________________________

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<meta name=3D"viewport" content=3D"width=3Ddevice-width, user-scalable=3Dno=
, initial-scale=3D1.0">
<div style=3D"direction: ltr;">
<div>It=92s an important document. I support its publication as coauthor. N=
ot aware of any IPR. Nokia has an implementation for a while now.</div>
<div style=3D"direction: ltr;">Thanks,</div>
<div style=3D"direction: ltr;">Jorge</div>
<div><br>
</div>
<div class=3D"ms-outlook-ios-signature"></div>
</div>
<div>&nbsp;</div>
<hr style=3D"display:inline-block;width:98%" tabindex=3D"-1">
<div id=3D"divRplyFwdMsg" dir=3D"dir=3D&quot;ltr&quot;"><font face=3D"Calib=
ri, sans-serif" style=3D"font-size:11pt" color=3D"#000000"><b>From:</b> BES=
S &lt;bess-bounces@ietf.org&gt; on behalf of stephane.litkowski@orange.com<=
br>
<b>Sent:</b> Monday, December 3, 2018 14:43<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] WGLC, IPR and implementation poll for draft-ietf-bes=
s-evpn-virtual-eth-segment
<div>&nbsp;</div>
</font></div>
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<p class=3D"MsoPlainText">Hello Working Group,</p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; </p>
<p class=3D"MsoPlainText">This email starts a two-week Working Group Last C=
all on draft-ietf-bess-evpn-virtual-eth-segment [1]</p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">This poll runs until *the 17th of December*.</p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">We are also polling for knowledge of any undisclo=
sed IPR that applies to this Document, to ensure that IPR has been disclose=
d in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for=
 more details).</p>
<p class=3D"MsoPlainText">If you are listed as an Author or a Contributor o=
f this Document please respond to this email and indicate whether or not yo=
u are aware of any relevant undisclosed IPR. The Document won't progress wi=
thout answers from all the Authors
 and Contributors.</p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">There is currently no IPR disclosed.&nbsp;&nbsp;<=
/p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">If you are not listed as an Author or a Contribut=
or, then please explicitly respond only if you are aware of any IPR that ha=
s not yet been disclosed in conformance with IETF rules.</p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">We are also polling for any existing implementati=
on as per [2].
</p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; </p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;Thank you,</p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; Stephane &amp; Matthew</p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;[1] <a href=3D"https://da=
tatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/">
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/<=
/a></p>
<p class=3D"MsoPlainText">&nbsp;</p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; [2] <a href=3D"https://mailarc=
hive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
/p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt; font-family:&quot;T=
imes New Roman&quot;,&quot;serif&quot;">&nbsp;</span></p>
</div>
<pre>______________________________________________________________________=
___________________________________________________

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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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--_000_AM0PR07MB384464CA4468ACE4358C2B65F7A80AM0PR07MB3844eurp_--


From nobody Wed Dec  5 09:32:43 2018
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From: IETF Secretariat <ietf-ipr@ietf.org>
To: <draft-ietf-bess-evpn-inter-subnet-forwarding@ietf.org>
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Subject: [bess] IPR Disclosure Huawei Technologies Co., Ltd's Statement about IPR related to draft-ietf-bess-evpn-inter-subnet-forwarding
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Dear Ali Sajassi, Samer Salam, Samir Thoria, John Drake, Jorge Rabadan:


An IPR disclosure that pertains to your Internet-Draft entitled
"Integrated Routing and Bridging in EVPN"
(draft-ietf-bess-evpn-inter-subnet-forwarding) was submitted to the IETF
Secretariat on  and has been posted on the "IETF Page of Intellectual
Property Rights Disclosures" (https://datatracker.ietf.org/ipr/3352/). The
title of the IPR disclosure is "Huawei Technologies Co.,Ltd's Statement
about IPR related to draft-ietf-bess-evpn-inter-subnet-forwarding"


Thank you

IETF Secretariat


From nobody Wed Dec  5 09:33:32 2018
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From: IETF Secretariat <ietf-ipr@ietf.org>
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Subject: [bess] IPR Disclosure Cisco's Statement about IPR related to draft-ietf-bess-evpn-virtual-eth-segment
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Dear Ali Sajassi, Patrice Brissette, Rick Schell, John Drake, Jorge Rabadan:


An IPR disclosure that pertains to your Internet-Draft entitled "EVPN
Virtual Ethernet Segment" (draft-ietf-bess-evpn-virtual-eth-segment) was
submitted to the IETF Secretariat on  and has been posted on the "IETF Page
of Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/3353/). The title of the IPR disclosure is
"Cisco's Statement about IPR related to
draft-ietf-bess-evpn-virtual-eth-segment"


Thank you

IETF Secretariat


From nobody Wed Dec  5 09:34:03 2018
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Dear Ali Sajassi, Patrice Brissette, Rick Schell, John Drake, Jorge Rabadan:


An IPR disclosure that pertains to your Internet-Draft entitled "EVPN
Virtual Ethernet Segment" (draft-ietf-bess-evpn-virtual-eth-segment) was
submitted to the IETF Secretariat on  and has been posted on the "IETF Page
of Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/3354/). The title of the IPR disclosure is
"Cisco's Statement about IPR related to
draft-ietf-bess-evpn-virtual-eth-segment"


Thank you

IETF Secretariat


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 5 Dec 2018 10:37:30 -0800
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To: zzhang@juniper.net
Cc: Thomas Morin <thomas.morin@orange.com>, Robert Kebler <rkebler@juniper.net>, bess-chairs@ietf.org, BESS <bess@ietf.org>
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-mvpn-fast-failover
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Hi Jeffrey,
thank you for the review, detailed questions and helpful comments. Please
find my notes, answers in-line tagged GIM>>.

Regards,
Greg

On Fri, Nov 30, 2018 at 5:14 PM Jeffrey (Zhaohui) Zhang <zzhang@juniper.net=
>
wrote:

> Hi,
>
>
>
> I have the following questions/comments:
>
>
>
>    The procedure described here is an OPTIONAL procedure that consists
>
>    of having a downstream PE take into account the status of P-tunnels
>
>    rooted at each possible upstream PEs, for including or not including
>
>    each given PE in the list of candidate UMHs for a given (C-S,C-G)
>
>    state.  The result is that, if a P-tunnel is "down" (see
>
>    Section 3.1), the PE that is the root of the P-tunnel will not be
>
>    considered for UMH selection, which will result in the downstream PE
>
>    to failover to the upstream PE which is next in the list of
>
>    candidates.
>
>
>
> Is it possible that a p2mp tunnel is considered up by some leaves but dow=
n
> by some other leaves, leaving to them choosing different UMH? In that cas=
e,
> procedures described in Section 9.1.1 ("Discarding Packets from Wrong PE"=
)
> of RFC 6513 must be used. I see that this is actually pointed out later i=
n
> section 6 =E2=80=93 good to have a pointer to it right here.
>
GIM>> Would the following new text that follows the quoted text address
your concern:
NEW TEXT:
   If rules to determine the state of the P-tunnel are not
   consistent across all PEs, then some may arrive at a different
   conclusion regarding the state of the tunnel, In such a scenario,
   procedures described in Section 9.1.1 of [RFC 6513] MUST be used.

>
>
> Additionally, the text in section 3 seems to be more biased on Single
> Forwarder Election choosing the UMH with the highest IP address. Section =
5
> of RFC6513 also describes two other options, hashing or based on =E2=80=
=9Cinstalled
> UMH route=E2=80=9D (aka unicast-based). It is not clear how the text in t=
his
> document applies to hashing based selection, and I don=E2=80=99t see how =
the text
> applies to unicast-based selection. Some rewording/clarification are need=
ed
> here.
>
GIM>> How would the use of an alternative UMH selection algorithm change
documented use of p2mp BFD? Do you think that if the Upstream PE selected
using, for example, hashing then defined use of BGP-BFD and p2mp BFD itself
no longer applicable?

>
>
>    For P-tunnels of type P2MP MPLS-TE, the status of the P-tunnel is
>
>    considered up if one or more of the P2MP RSVP-TE LSPs, identified by
>
>    the P-tunnel Attribute, are in Up state.
>
>
>
> Why is =E2=80=9Cone or more of =E2=80=A6=E2=80=9D used in the above text?
>
GIM>> Would s/one or more of/at least one of/ address your concern?

>
>
> There are several occurrences of ((S, G)). I assume they should be change=
d
> to (C-S, C-G).
>
GIM>> Indeed, globally replaced s/((S,G))/(C-S,C-G)/

>
>
>    A PE can be removed from the UMH candidate list for a given ((S, G))
>
>    if the P-tunnel for this (S, G) (I or S , depending) is leaf
>
>    triggered (PIM, mLDP)
>
>
>
> Perhaps either remove the (I or S , depending)or move it to before the
> =E2=80=9Cfor=E2=80=9D.
>
GIM>> Moved before the "for".

>
>
>    This document defines the format and ways of usingr a new BGP
>
>    attribute called the "BGP- BFD attribute".
>
>
>
> s/usingr/using/
>
GIM>> Yes, great catch.

>
>
>    o  MUST use [Ed.note] address as destination IP address when
>
>       transmitting BFD control packets;
>
>
>
> [Ed.note]?
>
GIM>> Replaced [Ed.note] to make it as follows:
    o  MUST use address in 127.0.0.0/8 range for IPv4 or in
      0:0:0:0:0:FFFF:7F00:0/104 range for IPv6 as destination IP address
      when transmitting BFD control packets;

>
>
>    If tracking of the P-tunnel by using a p2mp BFD session is to be
>
>    enabled after the P-tunnel has been already signaled, the the
>
>    procedure described above MUST be followed.
>
>
>
> What if the tracking is to be enabled before the P-tunnel has been
> signaled? The text implies different behavior?
>
GIM>> Not really, I guess. I think that the second sentence is important:
   Note that x-PMSI A-D Route MUST be re-sent with exactly the same
attributes as before and
   the BGP-BFD Attribute included.

> s/the the/then the/
>
GIM>> Done.

>
>
>    =E2=80=A6 The dedicated p2mp BFD session MAY monitor the state of
>
>    the Standby Upstream PE.
>
>
>
> What does the above text mean? Do you mean =E2=80=9CA different p2mp BFD =
session
> =E2=80=A6=E2=80=9D?
>
GIM>> Yes, thank you for the suggested re-wording. Applied s/The
dedicated/A different/

>
>
>    When such a procedure is used, in the context where fast restoration
>
>    mechanisms are used for the P-tunnels, leaf PEs should be configured
>
>    to wait before updating the UMH, to let the P-tunnel restoration
>
>    mechanism happen.  A configurable timer MUST be provided for this
>
>    purpose, and it is recommended to provide a reasonable default value
>
>    for this timer.
>
>
>
> What does =E2=80=9Csuch a procedure=E2=80=9D refers to?
>
GIM>> Would s/When such a procedure is used/In such a scenario/

> s/recommended/RECOMMENDED/?
>
GIM>> Great catch, thank you. Done.

>
>
> 3.1.7.  Per PE-CE link BFD Discriminator
>
>
>
>    The following approach is defined for the fast failover in response
>
>    to the detection of PE-CE link failures, in which UMH selection for a
>
>    given C-multicast route takes into account the state of the BFD
>
>    session associated with the state of the upstream PE-CE link.
>
>
>
> 3.1.7.1.  Upstream PE Procedures
>
>
>
>    For each protected PE-CE link, the upstream PE initiates a multipoint
>
>    BFD session [I-D.ietf-bfd-multipoint] as MultipointHead toward
>
>    downstream PEs.  A downstream PE monitors the state of the p2mp
>
>    session as MultipointTail and MAY interpret transition of the BFD
>
>    session into Down state as the indication of the associated PE-CE
>
>    link being down.
>
>
>
> Since the BFD packets are sent over the P2MP tunnel not the PE-CE link, m=
y
> understanding is that the BFD discriminator is still for the tunnel and n=
ot
> tied to the PE-CE link; but different from the previous case, the root wi=
ll
> stop sending BFD messages when it detects the PE-CE link failure. As far =
as
> the egress PEs are concerned, they don=E2=80=99t know if it is the tunnel=
 failure
> or PE-CE link failure.
>
>
>
> If my understanding is correct, the wording should be changed.
>
GIM>> There are other than stopping transmission of BFD control packets
ways to distinguish two conditions for the egress PE. For example, the
MultipointHead MAY set the State to AdminDown and continue sending BFD
control packets. If and when PE-CE link restored to Up, the MultipointHead
can set the state to Up in the BFD control packet.

>
>
>    =E2=80=A6  If the route to the
>
>    src/RP changes such that the RPF interface is changed to be a new PE-
>
>    CE interface, then the upstream PE will update the S-PMSI A-D route
>
>    with included BGP-BFD Attribute so that value of the BFD
>
>    Discriminator is associated with the new RPF link.
>
>
>
> If the RPF interface changes on the upstream PE, why should it update the
> route to send a new discriminator? As long as there is a new RPF interfac=
e
> couldn=E2=80=99t the upstream PE do nothing but start tracking the new RP=
F
> interface?
>
GIM>> I'll defer this one to Thomas and Rob.

>
>
> Regardless which way (the currently described way and my imagined way),
> some text should be added to discuss how the downstream would not switch =
to
> another upstream PE when the primary PE is just going through a RPF chang=
e.
>
GIM>>  Would appending the following text be acceptable to address your
concern:
NEW TEXT:
   To avoid unwarranted switchover a downstream PE MUST gracefully handle
the
   updated S-PMSI A-D route and switch to the use of the associated BFD
   Discriminator value.

>
>
> 4.  Standby C-multicast route
>
>
>
>    The procedures described below are limited to the case where the site
>
>    that contains C-S is connected to exactly two PEs. The procedures
>
>    require all the PEs of that MVPN to follow the single forwarder PE
>
>    selection, as specified in [RFC6513].
>
>
>
>
>
> Why would it not work with more than two upstream PEs?
>
> Why is it limited to single forwarder selection? What about unicast based
> selection?
>
GIM>> Again, asking for Thomas and Rob to help.

>
>
> This route, that has the semantics of being a 'standby'
>
>    C-multicast route, is further called a "Standby BGP C-multicast
>
>    route", and is constructed as follows:
>
>
>
>    o  the NLRI is constructed as the original C-multicast route, except
>
>       that the RD is the same as if the C-multicast route was built
>
>       using the standby PE as the UMH (it will carry the RD associated
>
>       to the unicast VPN route advertised by the standby PE for S)
>
>
>
> Since you mention RD, you might as well mention it carries a Route Target
> derived from the standby RE=E2=80=99s UMH route=E2=80=99s VRF RT Import E=
C.
>
GIM>> Woud the following be acceptable:
NEW TEXT:
   o  the NLRI is constructed as the original C-multicast route, except
      that the RD is the same as if the C-multicast route was built
      using the standby PE as the UMH (it will carry the RD associated
      to the unicast VPN route advertised by the standby PE for S and a
      Route Target derived from the standby PE's UMH route's VRF RT
      Import EC)

>
>
>    If at some later point the local PE determines that C-S is no longer
>
>    reachable through the Primary Upstream PE, the Standby Upstream PE
>
>    becomes the Upstream PE, and the local PE re-sends the C-multicast
>
>    route with RT that identifies the Standby Upstream PE, except that
>
>    now the route does not carry the Standby PE BGP Community (which
>
>    results in replacing the old route with a new route, with the only
>
>    difference between these routes being the presence/absence of the
>
>    Standby PE BGP Community).
>
>
>
> Additionally the LOCAL_PREF should also change?
>
GIM>> Like normative SHOULD?

>
>
> 4.3.  Reachability determination
>
>
>
>    The standby PE can use the following information to determine that
>
>    C-S can or cannot be reached through the primary PE:
>
>
>
> Shouldn=E2=80=99t this be 4.2.1 instead of 4.3?
>
GIM>> Yes, agree. Thank you.

>
>
> 5.  Hot leaf standby
>
>
>
>    The mechanisms defined in sections Section 4 and Section 3 can be
>
>    used together as follows.
>
>
>
> This section is a little confusing to me. It seems that it really should
> be how a leaf should behave when hot root standby is used, not that there
> is a =E2=80=9Chot leaf=E2=80=9D mode. A leaf is just a leaf, not a
> cold/warm/hot/primary/standby leaf.
>
GIM>> Would re-naming the section to "Use of Standby C-multicast Route" bet=
ter
reflect the content of the section?

>
>
> Thanks.
>
>
>
> Jeffrey
>
>
>
> *From:* BESS <bess-bounces@ietf.org> *On Behalf Of *
> stephane.litkowski@orange.com
> *Sent:* Thursday, November 22, 2018 2:54 AM
> *To:* bess@ietf.org
> *Cc:* bess-chairs@ietf.org
> *Subject:* [bess] WGLC, IPR and implementation poll for
> draft-ietf-bess-mvpn-fast-failover
>
>
>
> Hello Working Group,
>
>
>
> This email starts a two-week Working Group Last Call on
> draft-ietf-bess-mvpn-fast-failover-04  [1]
>
>
>
> This poll runs until *the 6th of December*.
>
>
>
> 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.
>
>
>
> Currently two IPRs have been disclosed 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.
>
>
>
> We are also polling for any existing implementation as per [2].
>
>
>
>     Thank you,
>
>     Stephane & Matthew
>
>
>
>     [1]
> https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.=
org_doc_draft-2Dietf-2Dbess-2Dmvpn-2Dfast-2Dfailover_&d=3DDwMFAg&c=3DHAkYuh=
63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3Df7wsLGcfzAWDNS6XNTBZwj_OLAOsZZqdr=
R2IDAzeZqE&m=3D21UeMvv2ofELpScacCIlRV64tml5G3zQ3NN5NqhC90s&s=3DZKwzFkFZdTKG=
HJdgRZ6PExBQcl1Ck5CGjhXDxYQYvvI&e=3D>
>
>
>
>     [2]
> https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__mailarchive.ietf.=
org_arch_msg_bess_cG3X1tTqb-5FvPC4rg56SEdkjqDpw&d=3DDwMFAg&c=3DHAkYuh63rsuh=
r6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3Df7wsLGcfzAWDNS6XNTBZwj_OLAOsZZqdrR2IDAz=
eZqE&m=3D21UeMvv2ofELpScacCIlRV64tml5G3zQ3NN5NqhC90s&s=3DfR1eK_EmnRha7QRf37=
WKaJmt1F5OLq7ynG7afcmPhM0&e=3D>
>
>
>
>
>
> _________________________________________________________________________=
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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div di=
r=3D"ltr"><div dir=3D"ltr">Hi Jeffrey,<div>thank you for the review, detail=
ed questions=C2=A0and helpful comments. Please find my notes, answers in-li=
ne tagged GIM&gt;&gt;.</div><div><br></div><div>Regards,</div><div>Greg</di=
v><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Fri, Nov 30, 2018 at 5=
:14 PM Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net" ta=
rget=3D"_blank">zzhang@juniper.net</a>&gt; wrote:<br></div><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">







<div lang=3D"EN-US">
<div class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134WordS=
ection1">
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Hi,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
I have the following questions/comments:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>The procedure described here is an OPTIONAL procedure that consists<=
u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>of having a downstream PE take into account the status of P-tunnels<=
u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>rooted at each possible upstream PEs, for including or not including=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>each given PE in the list of candidate UMHs for a given (C-S,C-G)<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>state.<span>=C2=A0 </span>The result is that, if a P-tunnel is &quot=
;down&quot; (see<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>Section 3.1), the PE that is the root of the P-tunnel will not be<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>considered for UMH selection, which will result in the downstream PE=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>to failover to the upstream PE which is next in the list of<u></u><u=
></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>candidates.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Is it possible that a p2mp tunnel is considered up by some leaves
 but down by some other leaves, leaving to them choosing different UMH? In =
that case, procedures described in Section 9.1.1 (&quot;Discarding Packets =
from Wrong PE&quot;) of RFC 6513 must be used. I see that this is actually =
pointed out later in section 6 =E2=80=93 good to have
 a pointer to it right here.</span></p></div></div></blockquote><div>GIM&gt=
;&gt; Would the following new text that follows the quoted text address you=
r concern:</div><div>NEW TEXT:=C2=A0</div><div><div>=C2=A0 =C2=A0If rules t=
o determine the state of the P-tunnel are not</div><div>=C2=A0 =C2=A0consis=
tent across all PEs, then some may arrive at a different</div><div>=C2=A0 =
=C2=A0conclusion regarding the state of the tunnel, In such a scenario,</di=
v><div>=C2=A0 =C2=A0procedures described in Section 9.1.1 of [RFC 6513] MUS=
T be used.</div></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"><di=
v lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650gmail-m_-8796632=
855555630134WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:1=
2pt;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Additionally, the text in section 3 seems to be more biased on Single
 Forwarder Election choosing the UMH with the highest IP address. Section 5=
 of RFC6513 also describes two other options, hashing or based on =E2=80=9C=
installed UMH route=E2=80=9D (aka unicast-based). It is not clear how the t=
ext in this document applies to hashing based selection,
 and I don=E2=80=99t see how the text applies to unicast-based selection. S=
ome rewording/clarification are needed here.</span></p></div></div></blockq=
uote><div>GIM&gt;&gt; How would the use of an alternative UMH selection alg=
orithm change documented use of p2mp BFD? Do you think that if the Upstream=
 PE selected using, for example, hashing then defined use of BGP-BFD and p2=
mp BFD itself no longer applicable?</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979=
650gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>For P-tunnels of type P2MP MPLS-TE, the status of the P-tunnel is<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>considered up if one or more of the P2MP RSVP-TE LSPs, identified by=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>the P-tunnel Attribute, are in Up state. <u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Why is =E2=80=9Cone or more of =E2=80=A6=E2=80=9D used in the above text?</=
span></p></div></div></blockquote><div>GIM&gt;&gt; Would s/one or more of/a=
t least one of/ address your concern?=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"><div lang=3D"EN-US"><div class=3D"gmail-m_-33083900=
41763979650gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal"=
><span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
There are several occurrences of ((S, G)). I assume they should be
 changed to (C-S, C-G).</span></p></div></div></blockquote><div>GIM&gt;&gt;=
 Indeed, globally replaced s/((S,G))/(C-S,C-G)/=C2=A0</div><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"><div lang=3D"EN-US"><div class=3D"gmail-m=
_-3308390041763979650gmail-m_-8796632855555630134WordSection1"><p class=3D"=
MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>A PE can be removed from the UMH candidate list for a given ((S, G))=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>if the P-tunnel for this (S, G) (I or S , depending) is leaf<u></u><=
u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>triggered (PIM, mLDP)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Perhaps either remove the
</span><span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;co=
lor:black">(I or S , depending)</span><span style=3D"font-size:12pt;color:r=
gb(31,78,121)">or
 move it to before the =E2=80=9Cfor=E2=80=9D.</span></p></div></div></block=
quote><div>GIM&gt;&gt; Moved before the &quot;for&quot;.=C2=A0</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"><div lang=3D"EN-US"><div class=
=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134WordSection1"><=
p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)"><=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>This document defines the format and ways of usingr a new BGP<u></u>=
<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>attribute called the &quot;BGP- BFD attribute&quot;. <u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
s/usingr/using/</span></p></div></div></blockquote><div>GIM&gt;&gt; Yes, gr=
eat catch.=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"><di=
v lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650gmail-m_-8796632=
855555630134WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:1=
2pt;color:rgb(31,78,121)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>o<span>=C2=A0 </span>MUST use [Ed.note] address as destination IP ad=
dress when<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span>transmitting BFD control packets;<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
[Ed.note]?</span></p></div></div></blockquote><div>GIM&gt;&gt; Replaced [Ed=
.note] to make it as follows:</div><div>=C2=A0 =C2=A0 o=C2=A0 MUST use addr=
ess in <a href=3D"http://127.0.0.0/8" target=3D"_blank">127.0.0.0/8</a> ran=
ge for IPv4 or in</div><div>=C2=A0 =C2=A0 =C2=A0 0:0:0:0:0:FFFF:7F00:0/104 =
range for IPv6 as destination IP address</div><div>=C2=A0 =C2=A0 =C2=A0 whe=
n transmitting BFD control packets;</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979=
650gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:12pt;color:rgb(31,78,121)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>If tracking of the P-tunnel by using a p2mp BFD session is to be<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>enabled after the P-tunnel has been already signaled, the the<u></u>=
<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>procedure described above MUST be followed.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
What if the tracking is to
 be enabled before the P-tunnel has been signaled? The text implies differe=
nt behavior?</span></p></div></div></blockquote><div>GIM&gt;&gt; Not really=
, I guess. I think that the second sentence is important:</div><div><div>=
=C2=A0 =C2=A0Note that x-PMSI A-D Route MUST be re-sent with exactly the sa=
me attributes as before and</div><div>=C2=A0 =C2=A0the BGP-BFD Attribute in=
cluded.</div></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0p=
x 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div l=
ang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855=
555630134WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:12pt=
;color:rgb(31,78,121)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
s/the the/then the/</span></p></div></div></blockquote><div>GIM&gt;&gt; Don=
e.=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"><div lang=
=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555=
630134WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:12pt;co=
lor:rgb(31,78,121)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>=E2=80=A6 The dedicated p2mp BFD session MAY monitor the state of<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>the Standby Upstream PE.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
What does the above text mean? Do you mean =E2=80=9CA different p2mp BFD se=
ssion
 =E2=80=A6=E2=80=9D?</span></p></div></div></blockquote><div>GIM&gt;&gt; Ye=
s, thank you for the suggested re-wording. Applied s/The dedicated/A differ=
ent/=C2=A0</div><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"><div lang=
=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555=
630134WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:12pt;co=
lor:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>When such a procedure is used, in the context where fast restoration=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>mechanisms are used for the P-tunnels, leaf PEs should be configured=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>to wait before updating the UMH, to let the P-tunnel restoration<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>mechanism happen.<span>=C2=A0 </span>A configurable timer MUST be pr=
ovided for this<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>purpose, and it is recommended to provide a reasonable default value=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>for this timer.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
What does =E2=80=9Csuch a procedure=E2=80=9D refers to?</span></p></div></d=
iv></blockquote><div>GIM&gt;&gt; Would s/When such a procedure is used/In s=
uch a scenario/</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=
 lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650gmail-m_-87966328=
55555630134WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:12=
pt;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
s/recommended/RECOMMENDED/?</span></p></div></div></blockquote><div>GIM&gt;=
&gt; Great catch, thank you. Done.=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"><div lang=3D"EN-US"><div class=3D"gmail-m_-33083900417=
63979650gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal"><s=
pan style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck">3.1.7.<span>=C2=A0
</span>Per PE-CE link BFD Discriminator<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>The following approach is defined for the fast failover in response<=
u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>to the detection of PE-CE link failures, in which UMH selection for =
a<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>given C-multicast route takes into account the state of the BFD<u></=
u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>session associated with the state of the upstream PE-CE link.<u></u>=
<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck">3.1.7.1.<span>=C2=A0
</span>Upstream PE Procedures<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>For each protected PE-CE link, the upstream PE initiates a multipoin=
t<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>BFD session [I-D.ietf-bfd-multipoint] as MultipointHead toward<u></u=
><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>downstream PEs.<span>=C2=A0 </span>A downstream PE monitors the stat=
e of the p2mp<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>session as MultipointTail and MAY interpret transition of the BFD<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>session into Down state as the indication of the associated PE-CE<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>link being down.<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:12pt;color:rgb(31,78,121)">Since
 the BFD packets are sent over the P2MP tunnel not the PE-CE link, my under=
standing is that the BFD discriminator is still for the tunnel and not tied=
 to the PE-CE link; but different from the previous case, the root will sto=
p sending BFD messages when it detects
 the PE-CE link failure. As far as the egress PEs are concerned, they don=
=E2=80=99t know if it is the tunnel failure or PE-CE link failure.<u></u><u=
></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:12pt;color:rgb(31,78,121)"><u></u>=C2=A0<u></u></s=
pan></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:12pt;color:rgb(31,78,121)">If my
 understanding is correct, the wording should be changed.</span></p></div><=
/div></blockquote><div>GIM&gt;&gt; There are other than stopping transmissi=
on of BFD control packets ways to distinguish two conditions for the egress=
 PE. For example, the MultipointHead MAY set the State to AdminDown and con=
tinue sending BFD control packets. If and when PE-CE link restored to Up, t=
he MultipointHead can set the state to Up in the BFD control packet.</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"><div lang=3D"EN-US"><div c=
lass=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134WordSection=
1"><p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,78,121=
)"><u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:12pt;color:rgb(31,78,121)"><u></u>=C2=A0<u></u></s=
pan></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>=E2=80=A6<span>=C2=A0 </span>If the route to the<u></u><u></u></span=
></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>src/RP changes such that the RPF interface is changed to be a new PE=
-<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>CE interface, then the upstream PE will update the S-PMSI A-D route<=
u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>with included BGP-BFD Attribute so that value of the BFD<u></u><u></=
u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>Discriminator is associated with the new RPF link.<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
If the RPF interface changes on the upstream PE, why should it update
 the route to send a new discriminator? As long as there is a new RPF inter=
face couldn=E2=80=99t the upstream PE do nothing but start tracking the new=
 RPF interface?</span></p></div></div></blockquote><div>GIM&gt;&gt; I&#39;l=
l defer this one to Thomas and Rob.</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979=
650gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Regardless which way (the currently described way and my imagined
 way), some text should be added to discuss how the downstream would not sw=
itch to another upstream PE when the primary PE is just going through a RPF=
 change.</span></p></div></div></blockquote><div>GIM&gt;&gt;=C2=A0 Would ap=
pending the following text be acceptable to address your concern:</div><div=
>NEW TEXT:</div><div><div>=C2=A0 =C2=A0To avoid unwarranted switchover a do=
wnstream PE MUST gracefully handle the</div><div>=C2=A0 =C2=A0updated S-PMS=
I A-D route and switch to the use of the associated BFD</div><div>=C2=A0 =
=C2=A0Discriminator value.</div></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"><div lang=3D"EN-US"><div class=3D"gmail-m_-3308390041763979650=
gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal"><span styl=
e=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck">4.<span>=C2=A0
</span>Standby C-multicast route<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>The procedures described below are limited to the case where the sit=
e<u></u><u></u></span></p>
<pre><span style=3D"color:black"><span>=C2=A0=C2=A0 </span>that contains C-=
S is connected to exactly two PEs. The procedures<u></u><u></u></span></pre=
>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>require all the PEs of that MVPN to follow the single forwarder PE<u=
></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>selection, as specified in [RFC6513].<span>=C2=A0 </span>
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Why would it not work with more than two upstream PEs?<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Why is it limited to single forwarder selection? What about unicast
 based selection?</span></p></div></div></blockquote><div>GIM&gt;&gt; Again=
, asking for Thomas and Rob to help.=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"><div lang=3D"EN-US"><div class=3D"gmail-m_-330839004=
1763979650gmail-m_-8796632855555630134WordSection1"><p class=3D"MsoNormal">=
<span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck">This route, that has the semantics of being a &#39;standby&#39;<u></u><=
u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>C-multicast route, is further called a &quot;Standby BGP C-multicast=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>route&quot;, and is constructed as follows:<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>o<span>=C2=A0 </span>the NLRI is constructed as the original C-multi=
cast route, except<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span>that the RD is the same as if the C-multicast route was built<u></u>=
<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span>using the standby PE as the UMH (it will carry the RD associated<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span>to the unicast VPN route advertised by the standby PE for S)<u></u><=
u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Since you mention RD, you might as well mention it carries a Route
 Target derived from the standby RE=E2=80=99s UMH route=E2=80=99s VRF RT Im=
port EC.</span></p></div></div></blockquote><div>GIM&gt;&gt; Woud the follo=
wing be acceptable:</div><div>NEW TEXT:</div><div><div>=C2=A0 =C2=A0o=C2=A0=
 the NLRI is constructed as the original C-multicast route, except</div><di=
v>=C2=A0 =C2=A0 =C2=A0 that the RD is the same as if the C-multicast route =
was built</div><div>=C2=A0 =C2=A0 =C2=A0 using the standby PE as the UMH (i=
t will carry the RD associated</div><div>=C2=A0 =C2=A0 =C2=A0 to the unicas=
t VPN route advertised by the standby PE for S and a</div><div>=C2=A0 =C2=
=A0 =C2=A0 Route Target derived from the standby PE&#39;s UMH route&#39;s V=
RF RT</div><div>=C2=A0 =C2=A0 =C2=A0 Import EC)</div></div><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"><div lang=3D"EN-US"><div class=3D"gmail-m=
_-3308390041763979650gmail-m_-8796632855555630134WordSection1"><p class=3D"=
MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>If at some later point the local PE determines that C-S is no longer=
<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>reachable through the Primary Upstream PE, the Standby Upstream PE<u=
></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>becomes the Upstream PE, and the local PE re-sends the C-multicast<u=
></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>route with RT that identifies the Standby Upstream PE, except that<u=
></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>now the route does not carry the Standby PE BGP Community (which<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>results in replacing the old route with a new route, with the only<u=
></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>difference between these routes being the presence/absence of the<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>Standby PE BGP Community).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Additionally the LOCAL_PREF should also change?</span></p></div></div></blo=
ckquote><div>GIM&gt;&gt; Like normative SHOULD?=C2=A0</div><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"><div lang=3D"EN-US"><div class=3D"gmail-m=
_-3308390041763979650gmail-m_-8796632855555630134WordSection1"><p class=3D"=
MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck">4.3.<span>=C2=A0
</span>Reachability determination<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>The standby PE can use the following information to determine that<u=
></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>C-S can or cannot be reached through the primary PE:<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Shouldn=E2=80=99t this be 4.2.1 instead of 4.3?</span></p></div></div></blo=
ckquote><div>GIM&gt;&gt; Yes, agree. Thank you.=C2=A0=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"><div lang=3D"EN-US"><div class=3D"g=
mail-m_-3308390041763979650gmail-m_-8796632855555630134WordSection1"><p cla=
ss=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u=
><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck">5.<span>=C2=A0
</span>Hot leaf standby<u></u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>The mechanisms defined in sections Section 4 and Section 3 can be<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;color:bla=
ck"><span>=C2=A0=C2=A0
</span>used together as follows.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
This section is a little confusing to me. It seems that it really
 should be how a leaf should behave when hot root standby is used, not that=
 there is a =E2=80=9Chot leaf=E2=80=9D mode. A leaf is just a leaf, not a c=
old/warm/hot/primary/standby leaf.</span></p></div></div></blockquote><div>=
GIM&gt;&gt; Would re-naming the section to &quot;Use of=C2=A0<span style=3D=
"color:rgb(0,0,0);font-size:13.3333px">Standby C-multicast Route&quot;</spa=
n>=C2=A0better reflect the content of the section?</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"><div lang=3D"EN-US"><div class=3D"gmail-m_=
-3308390041763979650gmail-m_-8796632855555630134WordSection1"><p class=3D"M=
soNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)"><u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Thanks.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
Jeffrey<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:rgb(31,73,125)">=
<u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span>From:</span></b><span> BESS &lt;<a href=3D"=
mailto:bess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a>&g=
t;
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com" target=
=3D"_blank">stephane.litkowski@orange.com</a><br>
<b>Sent:</b> Thursday, November 22, 2018 2:54 AM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Cc:</b> <a href=3D"mailto:bess-chairs@ietf.org" target=3D"_blank">bess-c=
hairs@ietf.org</a><br>
<b>Subject:</b> [bess] WGLC, IPR and implementation poll for draft-ietf-bes=
s-mvpn-fast-failover<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">Hello Working Group,<u></u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">=C2=A0=C2=A0=C2=A0 <u></u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">This email starts a two-week Working Group Last Call on draft-ietf-b=
ess-mvpn-fast-failover-04 =C2=A0[1]<u></u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">=C2=A0<u></u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">This poll runs until *the 6th of December*.<u></u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">=C2=A0<u></u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">We are also polling for knowledge of any undisclosed IPR that applie=
s to this Document, to ensure that IPR has been disclosed in compliance wit=
h IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).<u><=
/u><u></u></p>
<p class=3D"gmail-m_-3308390041763979650gmail-m_-8796632855555630134MsoPlai=
nText">If you are listed as an Author or a Contributor of this Document ple=
ase respond to this email and indicate whether or not you are aware of any =
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To: "draft-ietf-bess-evpn-yang@ietf.org" <draft-ietf-bess-evpn-yang@ietf.org>
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Subject: [bess] Some question about the evpn yang
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Dear Editors of the EVPN YANG data model draft,


1.     I have found that there are list ip-prefix-route under the evpn-inst=
ance, when will use this?
          +--rw evpn-instances
             +--rw evpn-instance* [name]

                +--ro routes

                |  +--ro ip-prefix-route*

2. According to this model, how to support EVPN vlan-aware service?


would highly appreciated your responses.

Regards,
Haibo


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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black">Dear Editors of =
the EVPN YANG data model draft,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:18.0pt;text-indent:-18.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-family:&quot;&#2449=
4;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black"><span style=3D"mso=
-list:Ignore">1.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbs=
p;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-family:&q=
uot;&#24494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black">I have f=
ound that there are list ip-prefix-route under the evpn-instance, when will=
 use this?<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;font-family:&quot;var(--a)&quot;,serif=
;color:#404040">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43=
;--rw evpn-instances<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;font-family:&quot;var(--a)&quot;,serif=
;color:#404040">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp; &#43;--rw evpn-instance* [name]<o:p></o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;c=
olor:#404040">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#43;--ro routes<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;c=
olor:#404040">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>|&nbsp; &#43;--ro ip-prefix-route*<o:p></o=
:p></b></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;c=
olor:#404040">2. According to this model, how to support EVPN vlan-aware se=
rvice?<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;var(--a)&quot;,serif;c=
olor:#404040"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black">would highly app=
reciated your responses.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black">Regards,<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black">Haibo<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;&#24=
494;&#36719;&#38597;&#40657;&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p=
></span></p>
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Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-mvpn-fast-failover
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Date: Thu, 6 Dec 2018 09:30:59 +0000
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-mvpn-fast-failover
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Hi WG,

The WGLC poll is over. Authors have now to address Jeffrey's comment before=
 moving forward.

Brgds,


From: stephane.litkowski@orange.com [mailto:stephane.litkowski@orange.com]
Sent: Thursday, November 22, 2018 08:54
To: bess@ietf.org
Cc: bess-chairs@ietf.org
Subject: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-mvpn-=
fast-failover


Hello Working Group,



This email starts a two-week Working Group Last Call on draft-ietf-bess-mvp=
n-fast-failover-04  [1]



This poll runs until *the 6th of December*.



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.



Currently two IPRs have been disclosed 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.



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



    Thank you,

    Stephane & Matthew



    [1] https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/



    [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw




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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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This message and its attachments may contain confidential or privileged inf=
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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi WG,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">The WGLC poll is over.=
 Authors have now to address Jeffrey&#8217;s comment before moving forward.=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Brgds,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> stephane=
.litkowski@orange.com [mailto:stephane.litkowski@orange.com]
<br>
<b>Sent:</b> Thursday, November 22, 2018 08:54<br>
<b>To:</b> bess@ietf.org<br>
<b>Cc:</b> bess-chairs@ietf.org<br>
<b>Subject:</b> [bess] WGLC, IPR and implementation poll for draft-ietf-bes=
s-mvpn-fast-failover<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Hello Working Group,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">This email starts a two-week Working Group Last C=
all on draft-ietf-bess-mvpn-fast-failover-04 &nbsp;[1]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">This poll runs until *the 6th of December*.<o:p><=
/o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for knowledge of any undisclo=
sed IPR that applies to this Document, to ensure that IPR has been disclose=
d in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for=
 more details).<o:p></o:p></p>
<p class=3D"MsoPlainText">If you are listed as an Author or a Contributor o=
f this Document please respond to this email and indicate whether or not yo=
u are aware of any relevant undisclosed IPR. The Document won't progress wi=
thout answers from all the Authors
 and Contributors.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">Currently two IPRs have been disclosed against th=
is Document.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">If you are not listed as an Author or a Contribut=
or, then please explicitly respond only if you are aware of any IPR that ha=
s not yet been disclosed in conformance with IETF rules.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for any existing implementati=
on as per [2].<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;Thank you,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; Stephane &amp; Matthew<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;[1] <a href=3D"https://da=
tatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/">
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/</a><o:=
p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; [2] <a href=3D"https://mailarc=
hive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<pre><o:p>&nbsp;</o:p></pre>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
</html>

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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Date: Thu, 6 Dec 2018 18:46:52 +0000
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Date: Thu, 6 Dec 2018 18:48:03 +0000
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References: <17128_1543833795_5C0508C3_17128_38_7_9E32478DFA9976438E7A22F69B08FF924B778825@OPEXCLILMA4.corporate.adroot.infra.ftgroup> <AM0PR07MB384464CA4468ACE4358C2B65F7A80@AM0PR07MB3844.eurprd07.prod.outlook.com>
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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References: <4ACF1273-2F08-492E-BC5B-6778B81BE7E1@nokia.com> <16253F7987E4F346823E305D08F9115AAB7C79CE@nkgeml514-mbs.china.huawei.com>
In-Reply-To: <16253F7987E4F346823E305D08F9115AAB7C79CE@nkgeml514-mbs.china.huawei.com>
From: Xufeng Liu <xufeng.liu.ietf@gmail.com>
Date: Thu, 6 Dec 2018 18:39:04 -0500
Message-ID: <CAEz6PPQH-xXaWOfiqPckbhdULzefEyM-Oi1_WHwu5GTFxVPW5w@mail.gmail.com>
To: xiejingrong@huawei.com
Cc: matthew.bocci@nokia.com, bess@ietf.org, draft-liu-bess-mvpn-yang@ietf.org
Content-Type: multipart/alternative; boundary="000000000000b2c188057c630104"
Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/AtKphpYa7bXsrbfkbp82h3fxTiI>
Subject: Re: [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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I am aware of any relevant IPR that applies to this Document.
I support the adoption as a co-author.

Thanks,
- Xufeng

On Wed, Dec 5, 2018 at 4:53 AM Xiejingrong <xiejingrong@huawei.com> wrote:

> I support the adoption.
>
>
>
> Thanks,
>
> Jingrong
>
>
>
> *From:* BESS [mailto:bess-bounces@ietf.org] *On Behalf Of *Bocci, Matthew
> (Nokia - GB)
> *Sent:* Monday, December 03, 2018 10:53 PM
> *To:* bess@ietf.org
> *Cc:* draft-liu-bess-mvpn-yang@ietf.org
> *Subject:* [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
>
>
>
> This email begins a two-week poll for adoption of
> draft-liu-bess-mvpn-yang-07.txt
>
>
>
> 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 won't
> progress without answers from all the authors and contributors.
>
> Currently there is one IPR declaration 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 Monday 17th December 2018.
>
>
>
> Regards,
>
> Matthew
>
>
>
>
>

--000000000000b2c188057c630104
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div dir=3D"ltr">I am aware of any relevant IPR <span styl=
e=3D"font-size:11pt;color:black">that applies to this Document.</span></div=
><div><span style=3D"font-size:11pt;color:black">I support the adoption as =
a co-<span style=3D"font-size:11pt;color:black">author.</span></span></div>=
<div><span style=3D"font-size:11pt;color:black"><br></span></div><div><span=
 style=3D"font-size:11pt;color:black">Thanks,</span></div><div><span style=
=3D"font-size:11pt;color:black">- Xufeng<br></span></div></div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr">On Wed, Dec 5, 2018 at 4:53 AM Xiejingr=
ong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejingrong@huawei.com</a=
>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_-8331962155885259016WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d">I support the adoption.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d">Jingrong<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d"><u></u>=C2=A0<u></u></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">F=
rom:</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt"> BESS [mailt=
o:<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">bess-bounces@i=
etf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Monday, December 03, 2018 10:53 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Cc:</b> <a href=3D"mailto:draft-liu-bess-mvpn-yang@ietf.org" target=3D"_=
blank">draft-liu-bess-mvpn-yang@ietf.org</a><br>
<b>Subject:</b> [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yan=
g-07<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">This email begins a two-week poll for adoption of draft-liu-bess-mv=
pn-yang-07.txt<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;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-GB" style=3D"font-size:11.0pt;color=
:black">Please review the draft and post any comments to the BESS working g=
roup list.</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;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-GB" style=3D"font-size:11.0pt;color=
:black">We are also=C2=A0polling for knowledge of any undisclosed IPR that =
applies to this Document, to ensure that IPR has been disclosed in complian=
ce with IETF IPR rules (see RFCs 3979, 4879,
 3669 and 5378 for more details).<u></u><u></u></span></p>
<p class=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"font-size:11.0pt;color=
:black">If you are listed as an author or a contributor of this document, p=
lease respond to this email and indicate whether or not you are aware of an=
y relevant undisclosed IPR, copying the
 BESS mailing list. The document won&#39;t progress without answers from al=
l the authors and contributors.</span><span lang=3D"EN-GB" style=3D"color:b=
lack"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">Currently there is one IPR declaration against this document.</span=
><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p>
<p class=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"font-size:11.0pt;color=
:black">If you are not listed as an author or a contributor, then please ex=
plicitly respond only if you are aware of any IPR that has not yet been dis=
closed in conformance with IETF rules.</span><span lang=3D"EN-GB" style=3D"=
color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">This poll for adoption closes on Monday 17<sup>th</sup> December 20=
18. =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-GB" style=3D"font-size:11.0pt;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-GB" style=3D"font-size:11.0pt;color=
:black">Regards,</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">Matthew
</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;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-GB"><u></u>=C2=A0<u></u></span></p>
</div>
</div>

</blockquote></div>

--000000000000b2c188057c630104--


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From: Xufeng Liu <xufeng.liu.ietf@gmail.com>
Date: Thu, 6 Dec 2018 18:51:02 -0500
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To: xiejingrong@huawei.com
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/mGZm-O1W-ey-8lfaTKT0E3LQ70s>
Subject: Re: [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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--0000000000007e27f5057c632c1d
Content-Type: text/plain; charset="UTF-8"

Sorry. I'd like to correct my previous email. I meant to say:

I am not aware of any relevant IPR that applies to this Document.

Thanks,
- Xufeng

On Thu, Dec 6, 2018 at 6:39 PM Xufeng Liu <xufeng.liu.ietf@gmail.com> wrote:

> I am aware of any relevant IPR that applies to this Document.
> I support the adoption as a co-author.
>
> Thanks,
> - Xufeng
>
> On Wed, Dec 5, 2018 at 4:53 AM Xiejingrong <xiejingrong@huawei.com> wrote:
>
>> I support the adoption.
>>
>>
>>
>> Thanks,
>>
>> Jingrong
>>
>>
>>
>> *From:* BESS [mailto:bess-bounces@ietf.org] *On Behalf Of *Bocci,
>> Matthew (Nokia - GB)
>> *Sent:* Monday, December 03, 2018 10:53 PM
>> *To:* bess@ietf.org
>> *Cc:* draft-liu-bess-mvpn-yang@ietf.org
>> *Subject:* [bess] Wg Adoption and IPR poll for
>> draft-liu-bess-mvpn-yang-07
>>
>>
>>
>> This email begins a two-week poll for adoption of
>> draft-liu-bess-mvpn-yang-07.txt
>>
>>
>>
>> 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 won't
>> progress without answers from all the authors and contributors.
>>
>> Currently there is one IPR declaration 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 Monday 17th December 2018.
>>
>>
>>
>> Regards,
>>
>> Matthew
>>
>>
>>
>>
>>
>

--0000000000007e27f5057c632c1d
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Sorry. I&#39;d like to correct my previous email. I m=
eant to say:</div><div><br></div><div>I am not aware of any relevant IPR <s=
pan style=3D"font-size:11pt;color:black">that applies to this Document.</sp=
an></div><div><span style=3D"font-size:11pt;color:black"><br></span></div><=
div><span style=3D"font-size:11pt;color:black">Thanks,</span></div><div><sp=
an style=3D"font-size:11pt;color:black">- Xufeng<br></span></div></div><br>=
<div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Dec 6, 2018 at 6:39 PM =
Xufeng Liu &lt;<a href=3D"mailto:xufeng.liu.ietf@gmail.com">xufeng.liu.ietf=
@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=
=3D"ltr"><div dir=3D"ltr">I am aware of any relevant IPR <span style=3D"fon=
t-size:11pt;color:black">that applies to this Document.</span></div><div><s=
pan style=3D"font-size:11pt;color:black">I support the adoption as a co-<sp=
an style=3D"font-size:11pt;color:black">author.</span></span></div><div><sp=
an style=3D"font-size:11pt;color:black"><br></span></div><div><span style=
=3D"font-size:11pt;color:black">Thanks,</span></div><div><span style=3D"fon=
t-size:11pt;color:black">- Xufeng<br></span></div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr">On Wed, Dec 5, 2018 at 4:53 AM Xiejingrong &lt=
;<a href=3D"mailto:xiejingrong@huawei.com" target=3D"_blank">xiejingrong@hu=
awei.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_-86780479965690986m_-8331962155885259016WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d">I support the adoption.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d">Jingrong<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1f497d"><u></u>=C2=A0<u></u></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">F=
rom:</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt"> BESS [mailt=
o:<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">bess-bounces@i=
etf.org</a>]
<b>On Behalf Of </b>Bocci, Matthew (Nokia - GB)<br>
<b>Sent:</b> Monday, December 03, 2018 10:53 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Cc:</b> <a href=3D"mailto:draft-liu-bess-mvpn-yang@ietf.org" target=3D"_=
blank">draft-liu-bess-mvpn-yang@ietf.org</a><br>
<b>Subject:</b> [bess] Wg Adoption and IPR poll for draft-liu-bess-mvpn-yan=
g-07<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">This email begins a two-week poll for adoption of draft-liu-bess-mv=
pn-yang-07.txt<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;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-GB" style=3D"font-size:11.0pt;color=
:black">Please review the draft and post any comments to the BESS working g=
roup list.</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;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-GB" style=3D"font-size:11.0pt;color=
:black">We are also=C2=A0polling for knowledge of any undisclosed IPR that =
applies to this Document, to ensure that IPR has been disclosed in complian=
ce with IETF IPR rules (see RFCs 3979, 4879,
 3669 and 5378 for more details).<u></u><u></u></span></p>
<p class=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"font-size:11.0pt;color=
:black">If you are listed as an author or a contributor of this document, p=
lease respond to this email and indicate whether or not you are aware of an=
y relevant undisclosed IPR, copying the
 BESS mailing list. The document won&#39;t progress without answers from al=
l the authors and contributors.</span><span lang=3D"EN-GB" style=3D"color:b=
lack"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">Currently there is one IPR declaration against this document.</span=
><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p>
<p class=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"font-size:11.0pt;color=
:black">If you are not listed as an author or a contributor, then please ex=
plicitly respond only if you are aware of any IPR that has not yet been dis=
closed in conformance with IETF rules.</span><span lang=3D"EN-GB" style=3D"=
color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">This poll for adoption closes on Monday 17<sup>th</sup> December 20=
18. =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-GB" style=3D"font-size:11.0pt;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-GB" style=3D"font-size:11.0pt;color=
:black">Regards,</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black">Matthew
</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;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-GB"><u></u>=C2=A0<u></u></span></p>
</div>
</div>

</blockquote></div>
</blockquote></div>

--0000000000007e27f5057c632c1d--


From nobody Fri Dec  7 01:01:09 2018
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From: Anoop Ghanwani <anoop@alumni.duke.edu>
Date: Fri, 7 Dec 2018 01:00:50 -0800
Message-ID: <CA+-tSzwdxwGTB99kozVhN-fb8EuxvD7d_i5t_c9b+y4Ee1dmyw@mail.gmail.com>
To: bess@ietf.org
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Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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I have reviewed the doc and I have mostly editorial comments.

Thanks,
Anoop

==

Throughout

VLAN Bundle, VLAN bundle, VLAN-Bundle, VLAN-bundle -- make consistent
VLAN Aware Bundle, VLAN-aware bundle, VLAN-Aware Bundle -- make consistent
bridge table, Bridge Table -- make consistent (also add definition to
terminology section)
DF election, DF Election -- make consistent
Default DF Election, default DF Election -- make consistent
non-DF -> NDF

Section 1

double Q-in-Q tags -> Q-in-Q tags

double is redundant

Section 2.1

Fig 1 is a bit confusing.  If the idea of the rectangle is to show a
core, then why have connections between PE1 and PE2, PE3, but not
between PE1 and PE4?

Change
>>>
Layer-2 devices are particularly susceptible to forwarding loops
because of the broadcast nature of the Ethernet traffic.
>>>
to
The effect of forwarding loops in a Layer-2 network is particularly
severe because of the broadcast nature of Ethernet traffic and the
lack of a TTL.

Section 2.2.1

a v4 or v6 peering -> an IPv4 or IPv6 peering

>>>
>From a forwarding perspective, this is
a churn, as it results in re-programming the PE ports as either
blocking or non-blocking at potentially all PEs when the DF changes.
>>>

Why would the reprogramming change at all PEs?  It should change for
at most 2 PEs for each (ES,EVI) being reprogrammed.  Maybe authors
were trying to convey something else?


Section 2.3

>>>
DF Election procedure Generally
>>>
Missing a period.


Section 3

specification in EVPN -> EVPN specification


Section 3.1

DF WAIT, DF_WAIT -- make consistent
DF Wait timer -- where is this defined?
Ethernet Segment Route -> Ethernet Segment route
stop DF timer ->  stop DF wait timer (?)
start DF timer -> start DF wait timer (?)

Section 4

rather than the state of the server states -> rather than the state of
the server (?)

Section 4.2

Si is the IP address of server i -> Si is the IP address of PE i
operator chooses so -> operator so chooses
Note 0 <= i,j <= Number of PEs -- should this be "< Number of PEs"?
Weight(V, Es, Sk) -> Weight(v, Es, Sk)
Pseudo-random -> pseudo-random
efficient deterministic -> efficient and deterministic
V4 -> IPv4
V6 -> IPv6


From nobody Fri Dec  7 07:20:15 2018
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From: Adrian Farrel <adrian@olddog.co.uk>
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Subject: [bess] Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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Reviewer: Adrian Farrel
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-df-election-framework-06.txt
Reviewer: Adrian Farrel
Review Date: 2018-12-07
IETF LC End Date: 2018-12-18
Intended Status: Standards Track

Summary:

This document is basically ready for publication, but has nits that should be
considered prior to publication.

Comments:

This document addresses issues in the default election algorithm used for
Designated Forwarder Election in EVPN (RFC 7432 and RFC 8124) by defining a new
election algorithm and a capability to influence the election result for a
VLAN, depending on the state of the associated Attachment Circuit.

This is an exceptionally clear and well written document. The authors and the
working group are to be congratulated.

During my review I observed a number of small issues and editorial nits. I
don't believe any of these is cause for discussion in the working group, but it
would be sensible to resolve them before publication.

Thanks and Happy Christmas,
Adrian
--
It's Christmas.
Buy someone you love a book of fairy tales.
https://www.feedaread.com/profiles/8604/
Available from your favourite online bookseller.
Or contact me to receive a signed copy by mail.

===

Major Issues:
 No major issues found

===

Minor Issues:

HRW1999 is provided as a normative reference, and from the text I can
see why. But no URL (stable or otherwise) is given for the reference.
Using my favorite search engine, I looked for and found a copy of
the referenced document on the IEEE site behind a paywall. I don't
think that will do at all. However, there is a version at
https://www.microsoft.com/en-us/research/wp-content/uploads/2017/02/HRW98.pdf
That appears to be dated 1998, but otherwise could be the same paper.

---

When I read in Section 3...

   In addition, since the specification in EVPN
   [RFC7432] does leave several questions open as to the precise final
   state machine behavior of the DF election, section 3.1 describes
   precisely the intended behavior.

... I wondered whether this document is updating 7432 in that respect.

Other features later in the document (such as section 5) confirm this.

---

Notwithstanding the mention of backward compatiblity in section 6, I
think it would be a good idea to include a very short section 3.2.1.

3.2.1.  Backward Compatibility

   Legacy implementations (i.e., those that predate this specification)
   will not advertise the DF Election Extended Community.  That means
   that all other participating PEs will not receive DF preferences and
   will revert to the defailt algorithm without AC-Influenced DF
   Election.

   Similarly, a legacy implementation receiving a DF Election Extended
   Community will ignore it and will continue to use the default
   algorithm.

---

On first reading, I missed an important subtlty in 3.2. The paragraph...

     - Otherwise if even a single advertisement for the type-4 route is
       not received with the locally configured DF Alg and capability,
       the default DF Election algorithm (modulus) algorithm MUST be
       used as in [RFC7432].

...is really important because it handles what to do if different
participating PEs disagree about which algorithm to use.  Your text is
perfectly fine and adequate, but the "locally configured" sort of hid
it from me first time around.

Maybe add a sentence to the end of the bullet point to say...

"This procedure handles the case where participating PEs disagree about
the DF algorithm and capability to apply."

---

Section 4 introduces 8124 for the first time. It's good that this is
applicable to private wire EVPN as well as 7432 EVPN. Maybe bring this
into focus in the Introducion?

It does make me wonder whether you are also updating 8124.

---

I think section 7 is good. Since you note that the "unfair" situation
may be created maliciously, should you note that there is also scope for
a downgrade attach where the advertisement from one PE is hidden, the
preferred algorithm is modified to any unexpected value, or any
unexpected bit in the capabilities bitfield is set? I think such an
attack assumes either a subversion of the PE (perhaps via its
configuration) or modification of the BGP message. Thus, it is not a
probable if adequate existing security mechanisms are used.

===

Nits:

The RFC Editor will require that the first section in the document is
the Introduction.

---

You use VNI and I-SID without expansion.

---

2.1
s/proposes/defines/

---

2.3
s/procedure Generally,/procedure.  Generally,/

---

3.2 has

   For the DF election procedures to be consistent and unanimous, it is
   necessary that all the participating PEs agree on the DF Election
   algorithm and capabilities to be used.

This is exactly the type of statement I was hoping for when I opened the
document, so thanks. But... :-)

This depends slightly on the definition of "all participating PEs". You
don't need all PEs in the EVPN to use the same algorithm, only the PEs
that share multi-homing connections.

You also use the term in 2.1 and other places in the document, so
perhaps I am worrying too much.

---

4.
s/the state of the server states/the server states./
s/on Unix utilities rand and srand/on the Unix utilities rand and srand/

---

I am not sure why you describe Wrand2 in section 4.2 because you
immediately decide to not use it. Maybe you can just describe Wrand and
observe that does the job?

---

4.2
   s/HRW solves the disadvantage/HRW solves the disadvantages/



From nobody Fri Dec  7 08:49:12 2018
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Subject: [bess] I-D Action: draft-ietf-bess-mvpn-evpn-aggregation-label-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           : MVPN/EVPN Tunnel Aggregation with Common Labels
        Authors         : Zhaohui Zhang
                          Eric Rosen
                          Wen Lin
                          Zhenbin Li
                          IJsbrand Wijnands
	Filename        : draft-ietf-bess-mvpn-evpn-aggregation-label-01.txt
	Pages           : 14
	Date            : 2018-12-07

Abstract:
   The MVPN specifications allow a single Point-to-Multipoint (P2MP)
   tunnel to carry traffic of multiple VPNs.  The EVPN specifications
   allow a single P2MP tunnel to carry traffic of multiple Broadcast
   Domains (BDs).  These features require the ingress router of the P2MP
   tunnel to allocate an upstream-assigned MPLS label for each VPN or
   for each BD.  A packet sent on a P2MP tunnel then carries the label
   that is mapped to its VPN or BD.  (In some cases, a distinct
   upstream-assigned is needed for each flow.)  Since each ingress
   router allocates labels independently, with no coordination among the
   ingress routers, the egress routers may need to keep track of a large
   number of labels.  The number of labels may need to be as large (or
   larger) than the product of the number of ingress routers times the
   number of VPNs or BDs.  However, the number of labels can be greatly
   reduced if the association between a label and a VPN or BD is made by
   provisioning, so that all ingress routers assign the same label to a
   particular VPN or BD.  New procedures are needed in order to take
   advantage of such provisioned labels.  These new procedures also
   apply to Multipoint-to-Multipoint (MP2MP) tunnels.  This document
   updates RFCs 6514, 7432 and 7582 by specifying the necessary
   procedures.



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

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

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


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From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
To: Anoop Ghanwani <anoop@alumni.duke.edu>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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Date: Fri, 7 Dec 2018 17:09:14 +0000
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Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
To: Adrian Farrel <adrian@olddog.co.uk>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "draft-ietf-bess-evpn-df-election-framework.all@ietf.org" <draft-ietf-bess-evpn-df-election-framework.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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Date: Fri, 7 Dec 2018 17:11:31 +0000
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Subject: Re: [bess] Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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From nobody Fri Dec  7 13:21:05 2018
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Reply-To: <adrian@olddog.co.uk>
From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Satya Mohanty \(satyamoh\)'" <satyamoh@cisco.com>
Cc: <ietf@ietf.org>, <bess@ietf.org>, <rse@rfc-editor.org>, <rtg-dir@ietf.org>
Date: Fri, 7 Dec 2018 21:20:47 -0000
Organization: Old Dog Consulting
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/T47tlmuswbj1VFDh5QkA-p8ZMHc>
Subject: [bess] Referencing material behind a paywall
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Hi,

[Changed the subject line, tried to reduce the recipients (but it's =
still a bit much), added the RSE in case she has advice]

It's tricky. Sometimes we need to reference material that is behind a =
paywall or simply in a paper journal. Sometimes we need to reference =
something from a published book.

Most often such references are Informative, and that's usually =
considered OK so long as there is a stable reference to the material =
(such as a URL, or an ISBN, or a DOI).=20

For Normative references the issue is more complex because the =
implication is that the reference must be read in order to understand =
and implement the RFC. That, of course, is a problem for an open access =
organisation like the IETF (you could look at https://open-stand.org/ =
for an overview of the principles that underlie this).

In general (and I think your draft is an example of this) it is possible =
to describe/rewrite the pieces of normative text without infringing =
copyright. That usually reduces the reference to Informative and =
provides enough information in the RFC for implementation. Your draft is =
an example of this because you have described the algorithms in your =
text with enough detail to allow an implementation: the reference is =
really only there to provide context and proof of the algorithms. (And =
anyway, having found a freely accessible copy of the reference in your =
draft, we are probably home and dry.)

Cheers,
Adrian

-----Original Message-----
From: Satya Mohanty (satyamoh) <satyamoh@cisco.com>=20
Sent: 07 December 2018 17:12
To: Adrian Farrel <adrian@olddog.co.uk>; rtg-dir@ietf.org
Cc: draft-ietf-bess-evpn-df-election-framework.all@ietf.org; =
ietf@ietf.org; bess@ietf.org
Subject: Re: Rtgdir last call review of =
draft-ietf-bess-evpn-df-election-framework-06

Hi Adrian,

Thank you very much for your detailed review and comments.
We will take care of all the nits that you have pointed out and include =
the reference to the IEEE/ACM TON paper (the link you have pointed out =
is indeed correct).

However, I had one query. Most of the time research journal/conference =
papers will be behind a paywall and there may not be a free cached copy =
available online.
How do we get across this problem?

Best,
--Satya

=EF=BB=BFOn 12/7/18, 7:20 AM, "Adrian Farrel" <adrian@olddog.co.uk> =
wrote:

    Reviewer: Adrian Farrel
    Review result: Has Nits
   =20
    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.
   =20
    Document: draft-ietf-bess-evpn-df-election-framework-06.txt
    Reviewer: Adrian Farrel
    Review Date: 2018-12-07
    IETF LC End Date: 2018-12-18
    Intended Status: Standards Track
   =20
    Summary:
   =20
    This document is basically ready for publication, but has nits that =
should be
    considered prior to publication.
   =20
    Comments:
   =20
    This document addresses issues in the default election algorithm =
used for
    Designated Forwarder Election in EVPN (RFC 7432 and RFC 8124) by =
defining a new
    election algorithm and a capability to influence the election result =
for a
    VLAN, depending on the state of the associated Attachment Circuit.
   =20
    This is an exceptionally clear and well written document. The =
authors and the
    working group are to be congratulated.
   =20
    During my review I observed a number of small issues and editorial =
nits. I
    don't believe any of these is cause for discussion in the working =
group, but it
    would be sensible to resolve them before publication.
   =20
    Thanks and Happy Christmas,
    Adrian
    --
    It's Christmas.
    Buy someone you love a book of fairy tales.
    https://www.feedaread.com/profiles/8604/
    Available from your favourite online bookseller.
    Or contact me to receive a signed copy by mail.
   =20
    =3D=3D=3D
   =20
    Major Issues:
     No major issues found
   =20
    =3D=3D=3D
   =20
    Minor Issues:
   =20
    HRW1999 is provided as a normative reference, and from the text I =
can
    see why. But no URL (stable or otherwise) is given for the =
reference.
    Using my favorite search engine, I looked for and found a copy of
    the referenced document on the IEEE site behind a paywall. I don't
    think that will do at all. However, there is a version at
    =
https://www.microsoft.com/en-us/research/wp-content/uploads/2017/02/HRW98=
.pdf
    That appears to be dated 1998, but otherwise could be the same =
paper.
   =20
    ---
   =20
    When I read in Section 3...
   =20
       In addition, since the specification in EVPN
       [RFC7432] does leave several questions open as to the precise =
final
       state machine behavior of the DF election, section 3.1 describes
       precisely the intended behavior.
   =20
    ... I wondered whether this document is updating 7432 in that =
respect.
   =20
    Other features later in the document (such as section 5) confirm =
this.
   =20
    ---
   =20
    Notwithstanding the mention of backward compatiblity in section 6, I
    think it would be a good idea to include a very short section 3.2.1.
   =20
    3.2.1.  Backward Compatibility
   =20
       Legacy implementations (i.e., those that predate this =
specification)
       will not advertise the DF Election Extended Community.  That =
means
       that all other participating PEs will not receive DF preferences =
and
       will revert to the defailt algorithm without AC-Influenced DF
       Election.
   =20
       Similarly, a legacy implementation receiving a DF Election =
Extended
       Community will ignore it and will continue to use the default
       algorithm.
   =20
    ---
   =20
    On first reading, I missed an important subtlty in 3.2. The =
paragraph...
   =20
         - Otherwise if even a single advertisement for the type-4 route =
is
           not received with the locally configured DF Alg and =
capability,
           the default DF Election algorithm (modulus) algorithm MUST be
           used as in [RFC7432].
   =20
    ...is really important because it handles what to do if different
    participating PEs disagree about which algorithm to use.  Your text =
is
    perfectly fine and adequate, but the "locally configured" sort of =
hid
    it from me first time around.
   =20
    Maybe add a sentence to the end of the bullet point to say...
   =20
    "This procedure handles the case where participating PEs disagree =
about
    the DF algorithm and capability to apply."
   =20
    ---
   =20
    Section 4 introduces 8124 for the first time. It's good that this is
    applicable to private wire EVPN as well as 7432 EVPN. Maybe bring =
this
    into focus in the Introducion?
   =20
    It does make me wonder whether you are also updating 8124.
   =20
    ---
   =20
    I think section 7 is good. Since you note that the "unfair" =
situation
    may be created maliciously, should you note that there is also scope =
for
    a downgrade attach where the advertisement from one PE is hidden, =
the
    preferred algorithm is modified to any unexpected value, or any
    unexpected bit in the capabilities bitfield is set? I think such an
    attack assumes either a subversion of the PE (perhaps via its
    configuration) or modification of the BGP message. Thus, it is not a
    probable if adequate existing security mechanisms are used.
   =20
    =3D=3D=3D
   =20
    Nits:
   =20
    The RFC Editor will require that the first section in the document =
is
    the Introduction.
   =20
    ---
   =20
    You use VNI and I-SID without expansion.
   =20
    ---
   =20
    2.1
    s/proposes/defines/
   =20
    ---
   =20
    2.3
    s/procedure Generally,/procedure.  Generally,/
   =20
    ---
   =20
    3.2 has
   =20
       For the DF election procedures to be consistent and unanimous, it =
is
       necessary that all the participating PEs agree on the DF Election
       algorithm and capabilities to be used.
   =20
    This is exactly the type of statement I was hoping for when I opened =
the
    document, so thanks. But... :-)
   =20
    This depends slightly on the definition of "all participating PEs". =
You
    don't need all PEs in the EVPN to use the same algorithm, only the =
PEs
    that share multi-homing connections.
   =20
    You also use the term in 2.1 and other places in the document, so
    perhaps I am worrying too much.
   =20
    ---
   =20
    4.
    s/the state of the server states/the server states./
    s/on Unix utilities rand and srand/on the Unix utilities rand and =
srand/
   =20
    ---
   =20
    I am not sure why you describe Wrand2 in section 4.2 because you
    immediately decide to not use it. Maybe you can just describe Wrand =
and
    observe that does the job?
   =20
    ---
   =20
    4.2
       s/HRW solves the disadvantage/HRW solves the disadvantages/
   =20
   =20
   =20



From nobody Sat Dec  8 15:29:25 2018
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From: Russ Housley <housley@vigilsec.com>
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Subject: [bess] Secdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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Reviewer: Russ Housley
Review result: Has Nits

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-df-election-framework-06
Reviewer: Russ Housley
Review Date: 2018-12-09
IETF LC End Date: 2018-12-18
IESG Telechat date: unknown

Summary: Has Nits


Major Concerns: None


Minor Concerns:

Please spell out EVPN on first use.  I suspect that "Ethernet VPN" is
good enough since "VPN" is quite well known.

The Abstract seems to be overly complete, so it reads more like an
Introduction.  I suggest someting like:

   An alternative to the default Designated Forwarder (DF) selection
   algorithm in Ethernet VPN (EVPN) networks is defined. The DF is the
   Provider Edge (PE) router responsible for sending broadcast, unknown
   unicast and multicast (BUM) traffic to multi-homed Customer Equipment
   (CE) on a particular Ethernet Segment (ES) within a VLAN. In addition,
   the capability to influence the DF election result for a VLAN based
   on the state of the associated Attachment Circuit (AC) is specified.

I suggest that the original Abstract text become Section 2.

Section 3 says:

   ...  In addition, since the specification in EVPN
   [RFC7432] does leave several questions open as to the precise final
   state machine behavior of the DF election, section 3.1 describes
   precisely the intended behavior.

This seems like an update to RFC 7432.  If that is the intent, please
update the Introduction and the Title Page Heading to say so.


Nits:

Section 2.2.1:  s/multi homed/multi-homed/

Section 4:  s/the state of the server states/the server states./


From nobody Mon Dec 10 02:13:36 2018
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Subject: [bess] [Technical Errata Reported] RFC8214 (5571)
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The following errata report has been submitted for RFC8214,
"Virtual Private Wire Service Support in Ethernet VPN".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata/eid5571

--------------------------------------
Type: Technical
Reported by: gangadhara reddy chavva; SatishKumar N Rodd <c.gangadhara.reddy@ericsson.com>

Section: 3.1

Original Text
-------------
C If set to 1, a control word [RFC4448] MUST be present
when sending EVPN packets to this PE. It is
recommended that the control word be included in the
absence of an entropy label [RFC6790].

Corrected Text
--------------
C If set to 1, a control word [RFC4448] MUST be present
when sending EVPN packets to this PE. It is
recommended that the control word be included in the
absence of an entropy label [RFC6790]. 

For detailed explanation of the behavior of EVPN VPWS 
session based on control word bit can be referred link: 
https://tools.ietf.org/html/rfc4447#section-6.2

which explains all combinations of control word 
configurations in detailed way whic was missing in RFC8214.

Notes
-----
RFC8214 doesn't mention the cases where control word configuration between the PE's can mismatch, disabled, enabled. which will lead to ambiguity in protocol implementation.

Instructions:
-------------
This erratum is currently posted as "Reported". If necessary, please
use "Reply All" to discuss whether it should be verified or
rejected. When a decision is reached, the verifying party  
can log in to change the status and edit the report, if necessary. 

--------------------------------------
RFC8214 (draft-ietf-bess-evpn-vpws-14)
--------------------------------------
Title               : Virtual Private Wire Service Support in Ethernet VPN
Publication Date    : August 2017
Author(s)           : S. Boutros, A. Sajassi, S. Salam, J. Drake, J. Rabadan
Category            : PROPOSED STANDARD
Source              : BGP Enabled Services
Area                : Routing
Stream              : IETF
Verifying Party     : IESG


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Subject: Re: [bess] Secdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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From nobody Mon Dec 10 12:42:07 2018
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To: adrian@olddog.co.uk, "'Satya Mohanty (satyamoh)'" <satyamoh@cisco.com>
Cc: ietf@ietf.org, bess@ietf.org, rtg-dir@ietf.org
References: <0f2e01d48e72$b9581340$2c0839c0$@olddog.co.uk>
From: Heather Flanagan <rse@rfc-editor.org>
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Subject: Re: [bess] Referencing material behind a paywall
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On 12/7/18 9:20 PM, Adrian Farrel wrote:
> Hi,
>
> [Changed the subject line, tried to reduce the recipients (but it's still a bit much), added the RSE in case she has advice]
>
> It's tricky. Sometimes we need to reference material that is behind a paywall or simply in a paper journal. Sometimes we need to reference something from a published book.
>
> Most often such references are Informative, and that's usually considered OK so long as there is a stable reference to the material (such as a URL, or an ISBN, or a DOI).
>
> For Normative references the issue is more complex because the implication is that the reference must be read in order to understand and implement the RFC. That, of course, is a problem for an open access organisation like the IETF (you could look at https://open-stand.org/ for an overview of the principles that underlie this).
>
> In general (and I think your draft is an example of this) it is possible to describe/rewrite the pieces of normative text without infringing copyright. That usually reduces the reference to Informative and provides enough information in the RFC for implementation. Your draft is an example of this because you have described the algorithms in your text with enough detail to allow an implementation: the reference is really only there to provide context and proof of the algorithms. (And anyway, having found a freely accessible copy of the reference in your draft, we are probably home and dry.)
>
> Cheers,
> Adrian


Hello all,

In general, I think having an open standard normatively reference 
paywalled material is a terrible idea. That said, at the IESG meeting in 
Bangkok, we discussed this a bit. Ekr offered an interesting proposal 
that would have this kind of reference be treated in a fashion similar 
to IPR declarations. I am waiting to see a more concrete proposal along 
these lines--and discuss it with the other streams to see if it can 
apply to all--before I put anything in a future style guide.

-Heather


> -----Original Message-----
> From: Satya Mohanty (satyamoh) <satyamoh@cisco.com>
> Sent: 07 December 2018 17:12
> To: Adrian Farrel <adrian@olddog.co.uk>; rtg-dir@ietf.org
> Cc: draft-ietf-bess-evpn-df-election-framework.all@ietf.org; ietf@ietf.org; bess@ietf.org
> Subject: Re: Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
>
> Hi Adrian,
>
> Thank you very much for your detailed review and comments.
> We will take care of all the nits that you have pointed out and include the reference to the IEEE/ACM TON paper (the link you have pointed out is indeed correct).
>
> However, I had one query. Most of the time research journal/conference papers will be behind a paywall and there may not be a free cached copy available online.
> How do we get across this problem?
>
> Best,
> --Satya
>
> ï»¿On 12/7/18, 7:20 AM, "Adrian Farrel" <adrian@olddog.co.uk> wrote:
>
>      Reviewer: Adrian Farrel
>      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-df-election-framework-06.txt
>      Reviewer: Adrian Farrel
>      Review Date: 2018-12-07
>      IETF LC End Date: 2018-12-18
>      Intended Status: Standards Track
>      
>      Summary:
>      
>      This document is basically ready for publication, but has nits that should be
>      considered prior to publication.
>      
>      Comments:
>      
>      This document addresses issues in the default election algorithm used for
>      Designated Forwarder Election in EVPN (RFC 7432 and RFC 8124) by defining a new
>      election algorithm and a capability to influence the election result for a
>      VLAN, depending on the state of the associated Attachment Circuit.
>      
>      This is an exceptionally clear and well written document. The authors and the
>      working group are to be congratulated.
>      
>      During my review I observed a number of small issues and editorial nits. I
>      don't believe any of these is cause for discussion in the working group, but it
>      would be sensible to resolve them before publication.
>      
>      Thanks and Happy Christmas,
>      Adrian
>      --
>      It's Christmas.
>      Buy someone you love a book of fairy tales.
>      https://www.feedaread.com/profiles/8604/
>      Available from your favourite online bookseller.
>      Or contact me to receive a signed copy by mail.
>      
>      ===
>      
>      Major Issues:
>       No major issues found
>      
>      ===
>      
>      Minor Issues:
>      
>      HRW1999 is provided as a normative reference, and from the text I can
>      see why. But no URL (stable or otherwise) is given for the reference.
>      Using my favorite search engine, I looked for and found a copy of
>      the referenced document on the IEEE site behind a paywall. I don't
>      think that will do at all. However, there is a version at
>      https://www.microsoft.com/en-us/research/wp-content/uploads/2017/02/HRW98.pdf
>      That appears to be dated 1998, but otherwise could be the same paper.
>      
>      ---
>      
>      When I read in Section 3...
>      
>         In addition, since the specification in EVPN
>         [RFC7432] does leave several questions open as to the precise final
>         state machine behavior of the DF election, section 3.1 describes
>         precisely the intended behavior.
>      
>      ... I wondered whether this document is updating 7432 in that respect.
>      
>      Other features later in the document (such as section 5) confirm this.
>      
>      ---
>      
>      Notwithstanding the mention of backward compatiblity in section 6, I
>      think it would be a good idea to include a very short section 3.2.1.
>      
>      3.2.1.  Backward Compatibility
>      
>         Legacy implementations (i.e., those that predate this specification)
>         will not advertise the DF Election Extended Community.  That means
>         that all other participating PEs will not receive DF preferences and
>         will revert to the defailt algorithm without AC-Influenced DF
>         Election.
>      
>         Similarly, a legacy implementation receiving a DF Election Extended
>         Community will ignore it and will continue to use the default
>         algorithm.
>      
>      ---
>      
>      On first reading, I missed an important subtlty in 3.2. The paragraph...
>      
>           - Otherwise if even a single advertisement for the type-4 route is
>             not received with the locally configured DF Alg and capability,
>             the default DF Election algorithm (modulus) algorithm MUST be
>             used as in [RFC7432].
>      
>      ...is really important because it handles what to do if different
>      participating PEs disagree about which algorithm to use.  Your text is
>      perfectly fine and adequate, but the "locally configured" sort of hid
>      it from me first time around.
>      
>      Maybe add a sentence to the end of the bullet point to say...
>      
>      "This procedure handles the case where participating PEs disagree about
>      the DF algorithm and capability to apply."
>      
>      ---
>      
>      Section 4 introduces 8124 for the first time. It's good that this is
>      applicable to private wire EVPN as well as 7432 EVPN. Maybe bring this
>      into focus in the Introducion?
>      
>      It does make me wonder whether you are also updating 8124.
>      
>      ---
>      
>      I think section 7 is good. Since you note that the "unfair" situation
>      may be created maliciously, should you note that there is also scope for
>      a downgrade attach where the advertisement from one PE is hidden, the
>      preferred algorithm is modified to any unexpected value, or any
>      unexpected bit in the capabilities bitfield is set? I think such an
>      attack assumes either a subversion of the PE (perhaps via its
>      configuration) or modification of the BGP message. Thus, it is not a
>      probable if adequate existing security mechanisms are used.
>      
>      ===
>      
>      Nits:
>      
>      The RFC Editor will require that the first section in the document is
>      the Introduction.
>      
>      ---
>      
>      You use VNI and I-SID without expansion.
>      
>      ---
>      
>      2.1
>      s/proposes/defines/
>      
>      ---
>      
>      2.3
>      s/procedure Generally,/procedure.  Generally,/
>      
>      ---
>      
>      3.2 has
>      
>         For the DF election procedures to be consistent and unanimous, it is
>         necessary that all the participating PEs agree on the DF Election
>         algorithm and capabilities to be used.
>      
>      This is exactly the type of statement I was hoping for when I opened the
>      document, so thanks. But... :-)
>      
>      This depends slightly on the definition of "all participating PEs". You
>      don't need all PEs in the EVPN to use the same algorithm, only the PEs
>      that share multi-homing connections.
>      
>      You also use the term in 2.1 and other places in the document, so
>      perhaps I am worrying too much.
>      
>      ---
>      
>      4.
>      s/the state of the server states/the server states./
>      s/on Unix utilities rand and srand/on the Unix utilities rand and srand/
>      
>      ---
>      
>      I am not sure why you describe Wrand2 in section 4.2 because you
>      immediately decide to not use it. Maybe you can just describe Wrand and
>      observe that does the job?
>      
>      ---
>      
>      4.2
>         s/HRW solves the disadvantage/HRW solves the disadvantages/
>      
>      
>      
>
>


From nobody Mon Dec 10 14:09:04 2018
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Date: Mon, 10 Dec 2018 23:08:35 +0100
Cc: "Adrian Farrel (adrian@olddog.co.uk)" <adrian@olddog.co.uk>, "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>, rtg-dir@ietf.org, ietf@ietf.org, bess@ietf.org
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On Dec 10, 2018, at 21:41, Heather Flanagan <rse@rfc-editor.org> wrote:
>=20
> similar to IPR declarations

For those people who believe in =E2=80=9CIPR=E2=80=9D, copyrights (which =
is the mechanism used to protect specifications that are behind =
paywalls) are =E2=80=9CIPR".  So this is very logical, even if the =
impact of this kind of IPR on large-scale vendors is much more limited =
than the kinds of =E2=80=9CIPR=E2=80=9D we usually talk about in the =
IETF (i.e., patent claims).  The impact on people who need to configure, =
diagnose, research, or otherwise assess the technology is still very =
relevant.

Gr=C3=BC=C3=9Fe, Carsten


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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
To: Heather Flanagan <rse@rfc-editor.org>, adrian@olddog.co.uk,
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Subject: Re: Referencing material behind a paywall
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On 10/12/2018 20:41, Heather Flanagan wrote:
> Ekr offered an interesting proposal that would have this kind of
> reference be treated in a fashion similar to IPR declarations.

Not a bad idea. I'd also make it like the downref registry [1]
though, since once we've got a normative reference in one RFC
to e.g. some IEEE 802 thing, then it shouldn't need new process
to have a 2nd RFC do the same.

Cheers,
S.

[1] https://datatracker.ietf.org/doc/downref/

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From: <stephane.litkowski@orange.com>
To: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Date: Tue, 11 Dec 2018 15:09:34 +0000
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Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



___________________________________________________________________________=
______________________________________________

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<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have received an early allocation request for the=
 draft-ietf-bess-mvpn-evpn-aggregation-label.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please raise your concerns if you object to this req=
uest and if you think that the document is not mature enough.<o:p></o:p></p>
<p class=3D"MsoNormal">Feel also free to support this request.<o:p></o:p></=
p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We will wait until next Monday (12/17) to gather fee=
dbacks.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
</html>

--_000_9E32478DFA9976438E7A22F69B08FF924B780A07OPEXCLILMA4corp_--


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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>
CC: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Date: Tue, 11 Dec 2018 16:19:54 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/cp_TJrBezryKVYY291UomUwXXcQ>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Stephane, and all,
Support.

Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com

From: BESS <bess-bounces@ietf.org> On Behalf Of stephane.litkowski@orange.=
com
Sent: Tuesday, December 11, 2018 5:10 PM
To: bess@ietf.org
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn=
-evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-=
evpn-aggregation-label.

Please raise your concerns if you object to this request and if you think =
that the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



__________________________________________________________________________=
_______________________________________________



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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Stephane, and all,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Support.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Regards,<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Sasha<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Office: &#43;972-3926=
6302<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cell:&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp; &#43;972-549266302<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Email:&nbsp;&nbsp; Al=
exander.Vainshtein@ecitele.com<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm=
 0cm 0cm">
<p class=3D"MsoNormal"><b>From:</b> BESS &lt;bess-bounces@ietf.org&gt; <b>=
On Behalf Of </b>
stephane.litkowski@orange.com<br>
<b>Sent:</b> Tuesday, December 11, 2018 5:10 PM<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-be=
ss-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have received an early allocation request for th=
e draft-ietf-bess-mvpn-evpn-aggregation-label.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please raise your concerns if you object to this re=
quest and if you think that the document is not mature enough.<o:p></o:p><=
/p>
<p class=3D"MsoNormal">Feel also free to support this request.<o:p></o:p><=
/p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We will wait until next Monday (12/17) to gather fe=
edbacks.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;T=
imes New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre>_____________________________________________________________________=
____________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations co=
nfidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous ave=
z recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messa=
ges electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, defor=
me ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privileg=
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<pre>they should not be distributed, used or copied without authorisation.=
<o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender an=
d delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have=
 been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
<br clear=3D"both">
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_<BR>
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From: Xiejingrong <xiejingrong@huawei.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Objection.

I remember I have raised my concerns, but I didn't find the response.

Copy the concerns I have listed before:
1.      The problem stated by this draft is valid, and the proposed method =
is useful for some of the listed problem. For example, EVPN BUM who uses MP=
LS identification and dataplane.
2.      EVPN BUM using vxlan/vni identification may not need a MPLS label t=
o identify the vpn/tenant.
3.      For MVPN who has a UMH(Upstream Multicast Hop) selection procedure,=
 the exist using of upstream-assigned VpnLabel can be optimized to only pop=
ulate to forwarding-state when there are c-multicast flows selecting the sp=
ecific UMH PE.
4.      For an End-to-End deployment of MVPN who spans multi-ASes as the wa=
y stated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a =
global-unique label is useful and possible. But operators may need to be ve=
ry careful to allocate the very limited MPLS labels. Because, MPLS labels h=
as been divided to SRLB and SRGB, and SRGB may have been again divided by S=
R-domains according to <draft-filsfils-spring-large-scale-interconnect-12>.
5.      For segmented MVPN deployment, the further divide of the MPLS Label=
 is also difficult when thinking of the above.
6.      For BIER, is the BIER proto=3D1 indicating a BIER-specific unique V=
pnLabel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  i=
f it is the later one, how about adding a new BIER proto value to indicatin=
g a BIER-specific unique VpnLabel ?  And then a static Context (BIER) can b=
e optional to the dynamic advertising of a Context ?

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.

Thank you.

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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">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I remember I have raised my concerns, but I didn&#8217;t find the=
 response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Copy the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:18.0pt;text-indent:-18.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;color:#1F=
497D">1.</span><span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&q=
uot;Times New Roman&quot;,serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;co=
lor:#1F497D">The problem stated by this draft is valid, and the proposed me=
thod is useful for some of the listed problem. For example, EVPN BUM who us=
es MPLS identification and dataplane.
</span><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-family:SimSun"><=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:18.0pt;text-indent:-18.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;color:#1F=
497D">2.</span><span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&q=
uot;Times New Roman&quot;,serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;co=
lor:#1F497D">EVPN BUM using vxlan/vni identification may not need a MPLS la=
bel to identify the vpn/tenant.</span><span lang=3D"EN-US" style=3D"font-si=
ze:12.0pt;font-family:SimSun"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:18.0pt;text-indent:-18.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;color:#1F=
497D">3.</span><span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&q=
uot;Times New Roman&quot;,serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;co=
lor:#1F497D">For MVPN who has a UMH(Upstream Multicast Hop) selection proce=
dure, the exist using of upstream-assigned VpnLabel can be optimized to onl=
y populate to forwarding-state when
 there are c-multicast flows selecting the specific UMH PE.</span><span lan=
g=3D"EN-US" style=3D"font-size:12.0pt;font-family:SimSun"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:18.0pt;text-indent:-18.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;color:#1F=
497D">4.</span><span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&q=
uot;Times New Roman&quot;,serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;co=
lor:#1F497D">For an End-to-End deployment of MVPN who spans multi-ASes as t=
he way stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the alloc=
ation of a global-unique label is useful and
 possible. But operators may need to be very careful to allocate the very l=
imited MPLS labels. Because, MPLS labels has been divided to SRLB and SRGB,=
 and SRGB may have been again divided by SR-domains according to &lt;draft-=
filsfils-spring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:12.0pt;font-family:Si=
mSun"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:18.0pt;text-indent:-18.0pt">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;color:#1F=
497D">5.</span><span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&q=
uot;Times New Roman&quot;,serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;co=
lor:#1F497D">For segmented MVPN deployment, the further divide of the MPLS =
Label is also difficult when thinking of the above.</span><span lang=3D"EN-=
US" style=3D"font-size:12.0pt;font-family:SimSun"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:SimSun;color:#1F497D">6.</span><span lang=3D"EN-US" style=3D"font-si=
ze:7.0pt;font-family:&quot;Times New Roman&quot;,serif;color:#1F497D">&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:SimSun;co=
lor:#1F497D">For BIER, is the BIER proto=3D1 indicating a BIER-specific uni=
que VpnLabel ? or a Per-platform (RFC5331) downstream-assigned unique label=
 ? &nbsp;if it is the later one, how about
 adding a new BIER proto value to indicating a BIER-specific unique VpnLabe=
l ? &nbsp;And then a static Context (BIER) can be optional to the dynamic a=
dvertising of a Context ?</span><span lang=3D"EN-US" style=3D"font-size:10.=
5pt;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS [mailto:bess-bounces@ietf.org]
<b>On Behalf Of </b>stephane.litkowski@orange.com<br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<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">Hi WG,<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">We have received an early alloc=
ation request for the draft-ietf-bess-mvpn-evpn-aggregation-label.<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">Please raise your concerns if y=
ou object to this request and if you think that the document is not mature =
enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Feel also free to support this =
request.<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">We will wait until next Monday =
(12/17) to gather feedbacks.<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,<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" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US">_________________________________________________=
________________________________________________________________________<o:=
p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">Ce message et ses pieces jointes peuvent contenir=
 des informations confidentielles ou privilegiees et ne doivent donc<o:p></=
o:p></span></pre>
<pre><span lang=3D"EN-US">pas etre diffuses, exploites ou copies sans autor=
isation. Si vous avez recu ce message par erreur, veuillez le signaler<o:p>=
</o:p></span></pre>
<pre><span lang=3D"EN-US">a l'expediteur et le detruire ainsi que les piece=
s jointes. Les messages electroniques etant susceptibles d'alteration,<o:p>=
</o:p></span></pre>
<pre><span lang=3D"EN-US">Orange decline toute responsabilite si ce message=
 a ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">This message and its attachments may contain conf=
idential or privileged information that may be protected by law;<o:p></o:p>=
</span></pre>
<pre><span lang=3D"EN-US">they should not be distributed, used or copied wi=
thout authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">If you have received this email in error, please =
notify the sender and delete this message and its attachments.<o:p></o:p></=
span></pre>
<pre><span lang=3D"EN-US">As emails may be altered, Orange is not liable fo=
r messages that have been modified, changed or falsified.<o:p></o:p></span>=
</pre>
<pre><span lang=3D"EN-US">Thank you.<o:p></o:p></span></pre>
</div>
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--_000_16253F7987E4F346823E305D08F9115AAB7DB407nkgeml514mbxchi_--


From nobody Wed Dec 12 06:02:49 2018
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Date: Wed, 12 Dec 2018 09:01:46 -0500
From: Jeffrey Haas <jhaas@pfrc.org>
To: bess@ietf.org
Cc: rtg-bfd@ietf.org
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Subject: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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BESS Working Group members,

https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04

BFD has finished working group last call on BFD for Vxlan and is about ready
to request publication as an RFC.  A last minute comment suggested that we
should consider inviting comment from your working group for expertise.

We will be leaving the last call open until December 21 to leave time for
final comments.

-- Jeff (for BFD)


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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: Xiejingrong <xiejingrong@huawei.com>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/GstlDwyCEeIWqawWpXbKL9s6caQ>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org> On Behalf Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com; bess@ietf.org
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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<w:LsdException Locked=3D"false" Priority=3D"1" SemiHidden=3D"true" UnhideW=
henUsed=3D"true" Name=3D"Default Paragraph Font"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text Indent"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Message Header"/>
<w:LsdException Locked=3D"false" Priority=3D"11" QFormat=3D"true" Name=3D"S=
ubtitle"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Salutation"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Date"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text First Indent"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text First Indent 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Note Heading"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text Indent 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text Indent 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Block Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Hyperlink"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"FollowedHyperlink"/>
<w:LsdException Locked=3D"false" Priority=3D"22" QFormat=3D"true" Name=3D"S=
trong"/>
<w:LsdException Locked=3D"false" Priority=3D"20" QFormat=3D"true" Name=3D"E=
mphasis"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Document Map"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Plain Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"E-mail Signature"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Top of Form"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Bottom of Form"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Normal (Web)"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Acronym"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Address"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Cite"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Code"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Definition"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Keyboard"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Preformatted"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Sample"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Typewriter"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Variable"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Normal Table"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"annotation subject"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"No List"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Outline List 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Simple 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Simple 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Simple 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Classic 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Classic 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Classic 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Classic 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Colorful 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Colorful 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Columns 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Contemporary"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Elegant"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Professional"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Balloon Text"/>
<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Theme"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
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<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
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<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/=
>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/=
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<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
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<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
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<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
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<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
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<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
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<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 4=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 5=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 6=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"tab-interval:.=
5in">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"font-size:12.0=
pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-f=
amily:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497=
D">Jingrong</span></span><span style=3D"font-size:12.0pt;mso-bidi-font-size=
:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bid=
i-font-family:&quot;Times New Roman&quot;;color:#1F497D">,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Please see
<span class=3D"SpellE">zzh</span>&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<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"mso-fareast-font-family:&quot;Time=
s New Roman&quot;">From:</span></b><span style=3D"mso-fareast-font-family:&=
quot;Times New Roman&quot;"> BESS &lt;bess-bounces@ietf.org&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> stephane.litkowski@orange.com; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color:#1F497D">Objec=
tion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"color:#1F497D"=
>Zzh</span></span><span style=3D"color:#1F497D">&gt; Please note that this =
is not a LC for the draft. This is the poll for early allocation for the DC=
B-flag and an extended community type.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">I rem=
ember I have raised my concerns, but I didn&#8217;t find the response.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"font-size:12.0=
pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-f=
amily:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497=
D">Zzh</span></span><span style=3D"font-size:12.0pt;mso-bidi-font-size:11.0=
pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-fon=
t-family:&quot;Times New Roman&quot;;color:#1F497D">&gt;
 Sorry for missing those. Please see below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Copy =
the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">The problem stated by this draft is valid, and the proposed method is us=
eful for some of the listed problem. For example, EVPN BUM who uses MPLS id=
entification and dataplane.
</span><span style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span class=3D"SpellE"><span style=3D"font-size:12.0pt;mso-bidi-fo=
nt-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;=
mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh</span><=
/span><span style=3D"font-size:12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-f=
ont-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:&quot=
;Times New Roman&quot;;color:#1F497D">&gt;
 Do you think the proposed solution is reasonable for the problems? If so, =
we would like to see early allocation is done. The allocation is temporary =
&#8211; it would time out after some time if the draft does not become a RF=
C.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">EVPN BUM using
<span class=3D"SpellE">vxlan</span>/<span class=3D"SpellE">vni</span> ident=
ification may not need a MPLS label to identify the
<span class=3D"SpellE">vpn</span>/tenant.</span><span style=3D"font-size:10=
.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"color:#1F497D"=
>Zzh</span></span><span style=3D"color:#1F497D">&gt; The draft is about &#8=
220;aggregation label&#8221;, so
<span class=3D"SpellE">vxlan</span>/<span class=3D"SpellE">vni</span> is ir=
relevant. On the other hand, in case of
<span class=3D"SpellE">vxlan</span>/<span class=3D"SpellE">vni</span>, the =
VNI is no different from a DCB label in concept (so the solution of using D=
CB label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, the =
exist using of upstream-assigned VpnLabel can be optimized to only populate=
 to forwarding-state when there are
 c-multicast flows selecting the specific UMH PE.</span><span style=3D"font=
-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"color:#1F497D"=
>Zzh</span></span><span style=3D"color:#1F497D">&gt; If that is a better so=
lution, perhaps a separate draft can be written. The solution in this draft=
 is simpler and in concept no different from
<span class=3D"SpellE">vxlan</span> case.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For an End-to-End deployment of MVPN who spans multi-ASes as the way sta=
ted in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the allocation of a=
 global-unique label is useful and possible.
 But operators may need to be very careful to allocate the very limited MPL=
S labels. Because, MPLS labels has been divided to SRLB and SRGB, and SRGB =
may have been again divided by SR-domains according to &lt;draft-filsfils-s=
pring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"color:#1F497D"=
>Zzh</span></span><span style=3D"color:#1F497D">&gt; What&#8217;s relevant =
here is the second part of your text above (the &#8220;But operators &#8230=
;&#8221;) &#8211; though that is the same point #5 below (please see my res=
ponse
 below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For segmented MVPN deployment, the further divide of the MPLS Label is a=
lso difficult when thinking of the above.</span><span style=3D"font-size:10=
.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"color:#1F497D"=
>Zzh</span></span><span style=3D"color:#1F497D">&gt; Please see section 2.2=
.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnLab=
el ? or a Per-platform (RFC5331) downstream-assigned unique label ? &nbsp;i=
f it is the later one, how about adding a
 new BIER proto value to indicating a BIER-specific unique VpnLabel ? &nbsp=
;And then a static Context (BIER) can be optional to the dynamic advertisin=
g of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"font-size:10.5=
pt;color:#1F497D">Zzh</span></span><span style=3D"font-size:10.5pt;color:#1=
F497D">&gt; In BIER header, proto=3D1 indicates downstream-assigned label. =
There is no need to define a new BIER specific
 proto value. The reason is that &#8220;downstream-assigned label&#8221; ju=
st means that it is a label in the &#8220;main/default&#8221; label space o=
f the receiving router, and a DCB label is just that. Nothing is BIER speci=
fic here. I believe Tony also responded to you (and in BIER
 WG).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"font-size:10.5=
pt;color:#1F497D">Zzh</span></span><span style=3D"font-size:10.5pt;color:#1=
F497D">&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"font-size:10.5=
pt;color:#1F497D">Zzh</span></span><span style=3D"font-size:10.5pt;color:#1=
F497D">&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> BESS [<a =
href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have received an early allocation request for the=
 draft-ietf-bess-mvpn-evpn-aggregation-label.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please raise your concerns if you object to this req=
uest and if you think that the document is not mature enough.<o:p></o:p></p=
>
<p class=3D"MsoNormal">Feel also free to support this request.<o:p></o:p></=
p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We will wait until next Monday (12/17) to gather fee=
dbacks.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
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<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
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From: Xiejingrong <xiejingrong@huawei.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
Thread-Index: AdSRY0PBVt0YG9tEQjai9rg/QSu3AAAU/xjQABrSiYAAGeYBEA==
Date: Thu, 13 Dec 2018 02:22:30 +0000
Message-ID: <16253F7987E4F346823E305D08F9115AAB7DD859@nkgeml514-mbx.china.huawei.com>
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.
But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?
For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.
DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).
Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.
Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com>; stephane.litkowski@orange.com; be=
ss@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Let m=
e take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In sum=
mary, labels can be allocated and advertised the following<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from the DCB.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication that they are=
 from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from a few<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; common context label spaces,
</span><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;co=
lor:red">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</span><span lang=
=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp; =
PEs advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels along with the context-identifying labels.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbs=
p; A central authority assigns disjoint label blocks from those a //<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allocate labels =
from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbsp; Each PE a=
llocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels from its assigned label block independently for it=
s<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-identifying labe=
ls.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option=
 1 is simplest, but it requires that all the PEs set aside a<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common=
 label block for the DCB that is large enough for all the<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/B=
Ds/ESes combined.&nbsp; Option 3 is needed only for segmented<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; select=
ive tunnels that are set up dynamically.&nbsp; Multiple options<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could =
be used in any combination depending on the deployment<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situat=
ion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Optio=
n-1 is simplest and I like it very much (anyone who don&#8217;t like simpli=
fication?). For Inter-area EVPN deployment scenarios, it is strong and simp=
le enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">But w=
hen it is not the suitable case, and Option-2 has to be used, I think thing=
s are becoming complex: You still need a DCB from &#8216;main/default&#8217=
; label-space, though this DCB is very small, which
 maybe only include ONE label. And then the ONE label is used as &#8216;con=
text-label&#8217;. While for BIER case, BIER header itself can act as a &#8=
216;BIER-Context&#8217; naturally. Am I understanding correctly ?<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">For O=
ption-3, I do understand it as two sub-options, Option-3a if there is enoug=
h number of Labels in the DCB, and Option-3b if there isn&#8217;t and the O=
NE &#8216;DCB&#8217; label is used as context-label. Each
 one is difficult for me to consider the development and deployment. One th=
e other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechanism to=
 select the right upstream-assigned VpnLabel to download to forwarding stat=
es.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">So my=
 summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to VNI very much, but the MPLS labels in the &#8220;main/default&=
#8221; space is very costly due to the &#8216;per-platform&#8217; (RFC5331)=
 allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to SRGB very much, but DCB requires &#8216;absolute&#8217; unique=
 value other than the &#8216;unique&#8217; index in SRGB(at least has such =
mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f context-label from a DCB can be comparable to the use of the &#8216;BIER-=
specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f &#8216;dynamic&#8217; allocation with DCB mechanism in segmented MVPN dep=
loyment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">I sug=
gest this draft to make more clear what the use cases are, what it really w=
ant to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Thank=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;xiejingrong@huawei.com&gt;; stephane.litkowski@o=
range.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please note that this is not a LC for the draft. This is the poll for earl=
y allocation for the DCB-flag and an extended community type.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I remember I have raised my concerns, but I didn&#8217;t find the=
 response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; Sorry for missing those. Please see below.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Copy the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">The problem stated by this draft is valid, and the propos=
ed method is useful for some of the listed problem. For example, EVPN BUM w=
ho uses MPLS identification and dataplane.
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D">Zzh&=
gt; Do you think the proposed solution is reasonable for the problems? If s=
o, we would like to see early allocation is
 done. The allocation is temporary &#8211; it would time out after some tim=
e if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">EVPN BUM using vxlan/vni identification may not need a MP=
LS label to identify the vpn/tenant.</span><span lang=3D"EN-US" style=3D"fo=
nt-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 The draft is about &#8220;aggregation label&#8221;, so vxlan/vni is irrele=
vant. On the other hand, in case of vxlan/vni, the VNI is no different from=
 a DCB label in concept (so the solution of using DCB
 label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For MVPN who has a UMH(Upstream Multicast Hop) selection =
procedure, the exist using of upstream-assigned VpnLabel can be optimized t=
o only populate to forwarding-state
 when there are c-multicast flows selecting the specific UMH PE.</span><spa=
n lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 If that is a better solution, perhaps a separate draft can be written. The=
 solution in this draft is simpler and in concept no different from vxlan c=
ase.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For an End-to-End deployment of MVPN who spans multi-ASes=
 as the way stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the =
allocation of a global-unique label is useful
 and possible. But operators may need to be very careful to allocate the ve=
ry limited MPLS labels. Because, MPLS labels has been divided to SRLB and S=
RGB, and SRGB may have been again divided by SR-domains according to &lt;dr=
aft-filsfils-spring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 What&#8217;s relevant here is the second part of your text above (the &#82=
20;But operators &#8230;&#8221;) &#8211; though that is the same point #5 b=
elow (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For segmented MVPN deployment, the further divide of the =
MPLS Label is also difficult when thinking of the above.</span><span lang=
=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For BIER, is the BIER proto=3D1 indicating a BIER-specifi=
c unique VpnLabel ? or a Per-platform (RFC5331) downstream-assigned unique =
label ? &nbsp;if it is the later one, how about
 adding a new BIER proto value to indicating a BIER-specific unique VpnLabe=
l ? &nbsp;And then a static Context (BIER) can be optional to the dynamic a=
dvertising of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; In BIER header, proto=3D1 indicates downstream-assigned l=
abel. There is no need to define a new BIER specific proto value. The reaso=
n is that &#8220;downstream-assigned label&#8221; just
 means that it is a label in the &#8220;main/default&#8221; label space of =
the receiving router, and a DCB label is just that. Nothing is BIER specifi=
c here. I believe Tony also responded to you (and in BIER WG).<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-boun=
ces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<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">Hi WG,<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">We have received an early alloc=
ation request for the draft-ietf-bess-mvpn-evpn-aggregation-label.<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">Please raise your concerns if y=
ou object to this request and if you think that the document is not mature =
enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Feel also free to support this =
request.<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">We will wait until next Monday =
(12/17) to gather feedbacks.<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,<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" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">_____________________________________________________________=
____________________________________________________________<o:p></o:p></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Ce message et ses pieces jointes peuvent contenir des informa=
tions confidentielles ou privilegiees et ne doivent donc<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">pas etre diffuses, exploites ou copies sans autorisation. Si =
vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">a l'expediteur et le detruire ainsi que les pieces jointes. L=
es messages electroniques etant susceptibles d'alteration,<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Orange decline toute responsabilite si ce message a ete alter=
e, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
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From: Xiejingrong <xiejingrong@huawei.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net>; stephane.litkowski@oran=
ge.com; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.
But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?
For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.
DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).
Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.
Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">s/inter-area/intra-area/g<o:p></o:p></span></p>
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<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> Xiejingrong
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;zzhang@juniper.net&gt;; stephane.l=
itkowski@orange.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:9.0pt">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Let m=
e take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In sum=
mary, labels can be allocated and advertised the following<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from the DCB.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication that they are=
 from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from a few<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; common context label spaces,
</span><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;co=
lor:red">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</span><span lang=
=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp; =
PEs advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels along with the context-identifying labels.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbs=
p; A central authority assigns disjoint label blocks from those a //<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allocate labels =
from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbsp; Each PE a=
llocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels from its assigned label block independently for it=
s<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-identifying labe=
ls.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option=
 1 is simplest, but it requires that all the PEs set aside a<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common=
 label block for the DCB that is large enough for all the<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/B=
Ds/ESes combined.&nbsp; Option 3 is needed only for segmented<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; select=
ive tunnels that are set up dynamically.&nbsp; Multiple options<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could =
be used in any combination depending on the deployment<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situat=
ion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Optio=
n-1 is simplest and I like it very much (anyone who don&#8217;t like simpli=
fication?). For Inter-area EVPN deployment scenarios, it is strong and simp=
le enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">But w=
hen it is not the suitable case, and Option-2 has to be used, I think thing=
s are becoming complex: You still need a DCB from &#8216;main/default&#8217=
; label-space, though this DCB is very small, which
 maybe only include ONE label. And then the ONE label is used as &#8216;con=
text-label&#8217;. While for BIER case, BIER header itself can act as a &#8=
216;BIER-Context&#8217; naturally. Am I understanding correctly ?<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">For O=
ption-3, I do understand it as two sub-options, Option-3a if there is enoug=
h number of Labels in the DCB, and Option-3b if there isn&#8217;t and the O=
NE &#8216;DCB&#8217; label is used as context-label. Each
 one is difficult for me to consider the development and deployment. One th=
e other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechanism to=
 select the right upstream-assigned VpnLabel to download to forwarding stat=
es.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">So my=
 summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to VNI very much, but the MPLS labels in the &#8220;main/default&=
#8221; space is very costly due to the &#8216;per-platform&#8217; (RFC5331)=
 allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to SRGB very much, but DCB requires &#8216;absolute&#8217; unique=
 value other than the &#8216;unique&#8217; index in SRGB(at least has such =
mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f context-label from a DCB can be comparable to the use of the &#8216;BIER-=
specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f &#8216;dynamic&#8217; allocation with DCB mechanism in segmented MVPN dep=
loyment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">I sug=
gest this draft to make more clear what the use cases are, what it really w=
ant to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Thank=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">=
mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please note that this is not a LC for the draft. This is the poll for earl=
y allocation for the DCB-flag and an extended community type.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I remember I have raised my concerns, but I didn&#8217;t find the=
 response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; Sorry for missing those. Please see below.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Copy the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">The problem stated by this draft is valid, and the propos=
ed method is useful for some of the listed problem. For example, EVPN BUM w=
ho uses MPLS identification and dataplane.
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D">Zzh&=
gt; Do you think the proposed solution is reasonable for the problems? If s=
o, we would like to see early allocation is
 done. The allocation is temporary &#8211; it would time out after some tim=
e if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">EVPN BUM using vxlan/vni identification may not need a MP=
LS label to identify the vpn/tenant.</span><span lang=3D"EN-US" style=3D"fo=
nt-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 The draft is about &#8220;aggregation label&#8221;, so vxlan/vni is irrele=
vant. On the other hand, in case of vxlan/vni, the VNI is no different from=
 a DCB label in concept (so the solution of using DCB
 label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For MVPN who has a UMH(Upstream Multicast Hop) selection =
procedure, the exist using of upstream-assigned VpnLabel can be optimized t=
o only populate to forwarding-state
 when there are c-multicast flows selecting the specific UMH PE.</span><spa=
n lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 If that is a better solution, perhaps a separate draft can be written. The=
 solution in this draft is simpler and in concept no different from vxlan c=
ase.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For an End-to-End deployment of MVPN who spans multi-ASes=
 as the way stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the =
allocation of a global-unique label is useful
 and possible. But operators may need to be very careful to allocate the ve=
ry limited MPLS labels. Because, MPLS labels has been divided to SRLB and S=
RGB, and SRGB may have been again divided by SR-domains according to &lt;dr=
aft-filsfils-spring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 What&#8217;s relevant here is the second part of your text above (the &#82=
20;But operators &#8230;&#8221;) &#8211; though that is the same point #5 b=
elow (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For segmented MVPN deployment, the further divide of the =
MPLS Label is also difficult when thinking of the above.</span><span lang=
=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For BIER, is the BIER proto=3D1 indicating a BIER-specifi=
c unique VpnLabel ? or a Per-platform (RFC5331) downstream-assigned unique =
label ? &nbsp;if it is the later one, how about
 adding a new BIER proto value to indicating a BIER-specific unique VpnLabe=
l ? &nbsp;And then a static Context (BIER) can be optional to the dynamic a=
dvertising of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; In BIER header, proto=3D1 indicates downstream-assigned l=
abel. There is no need to define a new BIER specific proto value. The reaso=
n is that &#8220;downstream-assigned label&#8221; just
 means that it is a label in the &#8220;main/default&#8221; label space of =
the receiving router, and a DCB label is just that. Nothing is BIER specifi=
c here. I believe Tony also responded to you (and in BIER WG).<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-boun=
ces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<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">Hi WG,<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">We have received an early alloc=
ation request for the draft-ietf-bess-mvpn-evpn-aggregation-label.<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">Please raise your concerns if y=
ou object to this request and if you think that the document is not mature =
enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Feel also free to support this =
request.<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">We will wait until next Monday =
(12/17) to gather feedbacks.<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,<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" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">_____________________________________________________________=
____________________________________________________________<o:p></o:p></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Ce message et ses pieces jointes peuvent contenir des informa=
tions confidentielles ou privilegiees et ne doivent donc<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">pas etre diffuses, exploites ou copies sans autorisation. Si =
vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">a l'expediteur et le detruire ainsi que les pieces jointes. L=
es messages electroniques etant susceptibles d'alteration,<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Orange decline toute responsabilite si ce message a ete alter=
e, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">This message and its attachments may contain confidential or =
privileged information that may be protected by law;<o:p></o:p></span></pre=
>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">they should not be distributed, used or copied without author=
isation.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">If you have received this email in error, please notify the s=
ender and delete this message and its attachments.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">As emails may be altered, Orange is not liable for messages t=
hat have been modified, changed or falsified.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Thank you.<o:p></o:p></span></pre>
</div>
</div>
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</html>

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From: <stephane.litkowski@orange.com>
To: Xiejingrong <xiejingrong@huawei.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi Jingrong,

Speaking as co-chair, what I need to know from this discussion is if there =
is a blocking point for the early allocation.
Yes, of course the draft will require some polishing, clarifications... as =
Jeffrey has mentioned, this is not a WGLC.

Based on your last sentence (and the overall discussion), I don't see any r=
eal blocking point but I want this to be crystal clear. So please state cle=
arly if you object to the early allocation or not and why. What is importan=
t to me is to ensure that the encoding is stable and does not require any c=
hange.


Thanks,

Stephane



From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Xiejingrong
Sent: Thursday, December 13, 2018 03:24
To: Jeffrey (Zhaohui) Zhang; LITKOWSKI Stephane OBS/OINIS; bess@ietf.org
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net>; stephane.litkowski@oran=
ge.com; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.
But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?
For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.
DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).
Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.
Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.

Thank you.

___________________________________________________________________________=
______________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Jingrong,<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Speaking as co-chair, =
what I need to know from this discussion is if there is a blocking point fo=
r the early allocation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Yes, of course the dra=
ft will require some polishing, clarifications&#8230; as Jeffrey has mentio=
ned, this is not a WGLC.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Based on your last sen=
tence (and the overall discussion), I don&#8217;t see any real blocking poi=
nt but I want this to be crystal clear. So please state clearly if you obje=
ct to the early allocation or not and why.
 What is important to me is to ensure that the encoding is stable and does =
not require any change.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Stephane<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [ma=
ilto:bess-bounces@ietf.org]
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Thursday, December 13, 2018 03:24<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang; LITKOWSKI Stephane OBS/OINIS; bess@ietf=
.org<br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">s/inter-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> Xiejingrong
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;zzhang@juniper.net&gt;; stephane.l=
itkowski@orange.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Hi Jeffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Let me take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; In summary, labels can be allocated and advertised the following<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; ways:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; 1.&nbsp; A central authority allocates per-VPN/BD/ES labels from the =
DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication t=
hat they are from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; 2.&nbsp; A central authority allocates per-VPN/BD/ES labels from a fe=
w<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; common context label spaces,
</span><span style=3D"font-family:&quot;Courier New&quot;;color:red;mso-far=
east-language:ZH-CN">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:red;mso-fareast-language:ZH-CN">&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</spa=
n><span style=3D"font-family:&quot;Courier New&quot;;color:navy;mso-fareast=
-language:ZH-CN">&nbsp; PEs
 advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; labels along with the context-identifying lab=
els.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; 3.&nbsp; A central authority assigns disjoint label blocks from those=
 a //<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allo=
cate labels from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbs=
p; Each PE allocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; labels from its assigned label block independ=
ently for its<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-iden=
tifying labels.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; Option 1 is simplest, but it requires that all the PEs set aside a<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; common label block for the DCB that is large enough for all the<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; VPNs/BDs/ESes combined.&nbsp; Option 3 is needed only for segmented<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; selective tunnels that are set up dynamically.&nbsp; Multiple options=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; could be used in any combination depending on the deployment<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; situation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Option-1 is simplest and I like it very much (anyone who don&#8217;t=
 like simplification?). For Inter-area EVPN deployment scenarios, it is str=
ong and simple enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">But when it is not the suitable case, and Option-2 has to be used, I=
 think things are becoming complex: You still need a DCB from &#8216;main/d=
efault&#8217; label-space, though this DCB is very
 small, which maybe only include ONE label. And then the ONE label is used =
as &#8216;context-label&#8217;. While for BIER case, BIER header itself can=
 act as a &#8216;BIER-Context&#8217; naturally. Am I understanding correctl=
y ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">For Option-3, I do understand it as two sub-options, Option-3a if th=
ere is enough number of Labels in the DCB, and Option-3b if there isn&#8217=
;t and the ONE &#8216;DCB&#8217; label is used as context-label.
 Each one is difficult for me to consider the development and deployment. O=
ne the other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechani=
sm to select the right upstream-assigned VpnLabel to download to forwarding=
 states.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">So my summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">DCB is similar to VNI very much, but the MPLS labels in the &#8220;m=
ain/default&#8221; space is very costly due to the &#8216;per-platform&#821=
7; (RFC5331) allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">DCB is similar to SRGB very much, but DCB requires &#8216;absolute&#=
8217; unique value other than the &#8216;unique&#8217; index in SRGB(at lea=
st has such mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Use of context-label from a DCB can be comparable to the use of the =
&#8216;BIER-specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Use of &#8216;dynamic&#8217; allocation with DCB mechanism in segmen=
ted MVPN deployment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">I suggest this draft to make more clear what the use cases are, what=
 it really want to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> Jeffrey (Zhaohui) Zha=
ng [<a href=3D"mailto:zzhang@juniper.net">mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<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"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> BESS &lt;<a href=3D"m=
ailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; Please note that this is not a LC for the draft. This is the p=
oll for early allocation for the DCB-flag and an extended community type.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">I remember I have raised my concerns, but I didn&#821=
7;t find the response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; Sorry for missing those. Please see below.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Copy the concerns I have listed before:<o:p></o:p></s=
pan></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">1.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">The problem stated by this draft is valid, and the proposed method is=
 useful for some of the listed problem. For example, EVPN BUM who uses MPLS=
 identification and dataplane.
</span><span style=3D"font-size:10.5pt;mso-fareast-language:ZH-CN"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fareast-language=
:ZH-CN">Zzh&gt; Do you think the proposed solution is reasonable for the pr=
oblems? If so, we would like to see early
 allocation is done. The allocation is temporary &#8211; it would time out =
after some time if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">2.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">EVPN BUM using vxlan/vni identification may not need a MPLS label to =
identify the vpn/tenant.</span><span style=3D"font-size:10.5pt;mso-fareast-=
language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; The draft is about &#8220;aggregation label&#8221;, so vxlan/v=
ni is irrelevant. On the other hand, in case of vxlan/vni, the VNI is no di=
fferent from a DCB label in concept (so the solution
 of using DCB label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">3.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, t=
he exist using of upstream-assigned VpnLabel can be optimized to only popul=
ate to forwarding-state when there
 are c-multicast flows selecting the specific UMH PE.</span><span style=3D"=
font-size:10.5pt;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; If that is a better solution, perhaps a separate draft can be =
written. The solution in this draft is simpler and in concept no different =
from vxlan case.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">4.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For an End-to-End deployment of MVPN who spans multi-ASes as the way =
stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the allocation o=
f a global-unique label is useful and possible.
 But operators may need to be very careful to allocate the very limited MPL=
S labels. Because, MPLS labels has been divided to SRLB and SRGB, and SRGB =
may have been again divided by SR-domains according to &lt;draft-filsfils-s=
pring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span style=3D"font-size:10.5pt;mso-fareast-language:ZH-CN"><=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; What&#8217;s relevant here is the second part of your text abo=
ve (the &#8220;But operators &#8230;&#8221;) &#8211; though that is the sam=
e point #5 below (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">5.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For segmented MVPN deployment, the further divide of the MPLS Label i=
s also difficult when thinking of the above.</span><span style=3D"font-size=
:10.5pt;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">6.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For BIER, is the BIER proto=3D1 indicating a BIER-specific unique Vpn=
Label ? or a Per-platform (RFC5331) downstream-assigned unique label ? &nbs=
p;if it is the later one, how about adding
 a new BIER proto value to indicating a BIER-specific unique VpnLabel ? &nb=
sp;And then a static Context (BIER) can be optional to the dynamic advertis=
ing of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; In BIER header, proto=3D1 indicates downstrea=
m-assigned label. There is no need to define a new BIER specific proto valu=
e. The reason is that &#8220;downstream-assigned
 label&#8221; just means that it is a label in the &#8220;main/default&#822=
1; label space of the receiving router, and a DCB label is just that. Nothi=
ng is BIER specific here. I believe Tony also responded to you (and in BIER=
 WG).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> BESS [<a href=3D"mail=
to:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Hi WG,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">We have r=
eceived an early allocation request for the draft-ietf-bess-mvpn-evpn-aggre=
gation-label.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Please ra=
ise your concerns if you object to this request and if you think that the d=
ocument is not mature enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Feel also=
 free to support this request.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">We will w=
ait until next Monday (12/17) to gather feedbacks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Thanks,<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Stephane<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;;mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">_________________________________________________=
________________________________________________________________________<o:=
p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">Ce message et ses pieces jointes peuvent contenir=
 des informations confidentielles ou privilegiees et ne doivent donc<o:p></=
o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">pas etre diffuses, exploites ou copies sans autor=
isation. Si vous avez recu ce message par erreur, veuillez le signaler<o:p>=
</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">a l'expediteur et le detruire ainsi que les piece=
s jointes. Les messages electroniques etant susceptibles d'alteration,<o:p>=
</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">Orange decline toute responsabilite si ce message=
 a ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">This message and its attachments may contain conf=
idential or privileged information that may be protected by law;<o:p></o:p>=
</span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">they should not be distributed, used or copied wi=
thout authorisation.<o:p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">If you have received this email in error, please =
notify the sender and delete this message and its attachments.<o:p></o:p></=
span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">As emails may be altered, Orange is not liable fo=
r messages that have been modified, changed or falsified.<o:p></o:p></span>=
</pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">Thank you.<o:p></o:p></span></pre>
</div>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: Xiejingrong <xiejingrong@huawei.com>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/ITe6kPsV2lrjwqK0JO_RXscadHk>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi Jingrong,

Please see zzh2> below.

From: BESS <bess-bounces@ietf.org> On Behalf Of Xiejingrong
Sent: Wednesday, December 12, 2018 9:24 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net>; stephane.litkowski@orange=
.com; bess@ietf.org
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net<mailto:zzhang@juniper.net=
>>; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.

Zzh2> So I assume you're not objecting to the early allocation for DCB-flag=
 at least?

But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?

Zzh2> Nowadays with the adoption of SR, allocating SAME SRGBs across router=
s is not difficult and is the preferred way. If you use DCB (could just be =
the SRGB itself) for non-segmented case, what's the concern with allocating=
 a context label from the DCB/SRGB? See later comment about BIER-context.

For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

Zzh2> There is no 3a. There could be multiple DCB labels for multiple conte=
xt label spaces, either because of scaling requirement (in theory) or for w=
hatever reason an operator wants to use multiple.
Zzh2> I don't think selectively installing upstream assigned labels based o=
n UMH is good enough (and it introduces more complexity). The sources could=
 be everywhere, and in case of EVPN, the forwarding could be (*,g) based, s=
o you'll end up with the original problem.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.

Zzh2> If one can do common SRGB for SR, then one can do DCB for MVPN/EVPN. =
If you're still concerned with that, you can have a separate context label =
space for EVPN/MVPN purpose, with the context label from the DCB/SRGB. I do=
n't want to tie it to BIER only though, because the problem and solution eq=
ually applies to P2MP tunnels.

DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).

Zzh2> Practically, operators strongly desire to use common SRGBs. Vendors h=
ad resisted the push for using common SRGBs but now have given up.

Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.

Zzh2> There is no need, and it is not desired to have a BIER-specific conte=
xt. Besides, defining a new BIER header's "proto" value to indicate a subse=
quent context label space should first be discussed in BIER WG; if that pas=
ses, then we come back to (or at least involve) BESS WG to enhance MVPN/EVP=
N signaling so that every PE knows where to allocate labels and where to in=
stall forwarding state.

Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

Zzh2> Compared to existing method of using upstream assigned labels, what i=
s the complexity? Upstream assigned labels are assigned from the assigner's=
 main/default label space; the "dynamic" allocation scheme in option-3 allo=
cates from a label block (of a context label space identified by a DCB labe=
l) assigned to the assigner. If the need to maintain that extra label block=
 information is complicated, wouldn't it be more complicated to selectively=
 install upstream-assigned labels based on UMH selection (forget about that=
 it would not work all the time)?

Zzh> If that is not convincing enough, what is a better solution? I know yo=
u have proposed doing IP lookup - we discussed in a separate thread on the =
pros/cons of that and we're working together on a separate draft on that, r=
ight? I also have a short section 2.2.2.3 on that.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Zzh2> The use cases and problem domains are discussed in section 2.1, and m=
ore complicated scenarios are followed-up in section 2.2.
Zzh2> About "what it don't" - can you point out the areas that you think th=
is draft should cover or explicitly declare out of scope?
Zzh2> Thanks.
Zzh2> Jeffrey


Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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<w:LsdException Locked=3D"false" Priority=3D"9" QFormat=3D"true" Name=3D"he=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" Priority=3D"9" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"35" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"table of figures"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"line number"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number 5"/>
<w:LsdException Locked=3D"false" Priority=3D"10" QFormat=3D"true" Name=3D"T=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"1" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"11" QFormat=3D"true" Name=3D"S=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"22" QFormat=3D"true" Name=3D"S=
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<w:LsdException Locked=3D"false" Priority=3D"20" QFormat=3D"true" Name=3D"E=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"E-mail Signature"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Top of Form"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
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<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
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<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/=
>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/=
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<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
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<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
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<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
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<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"tab-interval:.=
5in">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Hi
<span class=3D"SpellE">Jingrong</span>,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Please see zzh2&gt; =
below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<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"mso-fareast-font-family:&quot;Time=
s New Roman&quot;">From:</span></b><span style=3D"mso-fareast-font-family:&=
quot;Times New Roman&quot;"> BESS &lt;bess-bounces@ietf.org&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Wednesday, December 12, 2018 9:24 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;zzhang@juniper.net&gt;; stephane.lit=
kowski@orange.com; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">s/int=
er-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> Xiejingro=
ng <br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Hi Jeffrey,<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Let me take the sect=
ion 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In summary, labels ca=
n be allocated and advertised the following<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbsp; A central au=
thority allocates per-VPN/BD/ES labels from the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; PEs advertise the labels with an indication that they are from<o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbsp; A central au=
thority allocates per-VPN/BD/ES labels from a few<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; common context label spaces,
</span><span style=3D"font-family:&quot;Courier New&quot;;color:red">and al=
locate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;identify those context label spaces.</span><span style=3D"font-famil=
y:&quot;Courier New&quot;;color:navy">&nbsp; PEs advertise the VPN/BD<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; labels along with the context-identifying labels.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbsp; A central au=
thority assigns disjoint label blocks from those a //<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; few context label spaces to each PE, and allocate labels from the<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; DCB to identify the context label spaces.&nbsp; Each PE allocates<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; labels from its assigned label block independently for its<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; segmented S-PMSI, along with the context-identifying labels.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option 1 is simplest,=
 but it requires that all the PEs set aside a<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common label block fo=
r the DCB that is large enough for all the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/BDs/ESes combine=
d.&nbsp; Option 3 is needed only for segmented<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; selective tunnels tha=
t are set up dynamically.&nbsp; Multiple options<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could be used in any =
combination depending on the deployment<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situation.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Option-1 is simplest=
 and I like it very much (anyone who don&#8217;t like simplification?). For=
 Inter-area EVPN deployment scenarios, it is strong and simple enough I thi=
nk.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; So I assume=
 you&#8217;re not objecting to the early allocation for
 DCB-flag at least?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">But when it is not t=
he suitable case, and Option-2 has to be used, I think things are becoming =
complex: You still need a DCB from &#8216;main/default&#8217; label-space, =
though this DCB is very small, which maybe only
 include ONE label. And then the ONE label is used as &#8216;context-label&=
#8217;. While for BIER case, BIER header itself can act as a &#8216;BIER-Co=
ntext&#8217; naturally. Am I understanding correctly ?<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; Nowadays wi=
th the adoption of SR, allocating SAME SRGBs across
 routers is not difficult and is the preferred way. If you use DCB (could j=
ust be the SRGB itself) for non-segmented case, what&#8217;s the concern wi=
th allocating a context label from the DCB/SRGB? See later comment about BI=
ER-context.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">For Option-3, I do u=
nderstand it as two sub-options, Option-3a if there is enough number of Lab=
els in the DCB, and Option-3b if there isn&#8217;t and the ONE &#8216;DCB&#=
8217; label is used as context-label. Each one is difficult
 for me to consider the development and deployment. One the other hand, the=
 segmented MVPN can use the &#8216;UMH&#8217; mechanism to select the right=
 upstream-assigned VpnLabel to download to forwarding states.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; There is no=
 3a. There could be multiple DCB labels for multiple
 context label spaces, either because of scaling requirement (in theory) or=
 for whatever reason an operator wants to use multiple.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; I don&#8217=
;t think selectively installing upstream assigned labels
 based on UMH is good enough (and it introduces more complexity). The sourc=
es could be everywhere, and in case of EVPN, the forwarding could be (*,g) =
based, so you&#8217;ll end up with the original problem.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">So my summarized com=
ments: <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">DCB is similar to VN=
I very much, but the MPLS labels in the &#8220;main/default&#8221; space is=
 very costly due to the &#8216;per-platform&#8217; (RFC5331) allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; If one can =
do common SRGB for SR, then one can do DCB for MVPN/EVPN.
 If you&#8217;re still concerned with that, you can have a separate context=
 label space for EVPN/MVPN purpose, with the context label from the DCB/SRG=
B. I don&#8217;t want to tie it to BIER only though, because the problem an=
d solution equally applies to P2MP tunnels.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">DCB is similar to SR=
GB very much, but DCB requires &#8216;absolute&#8217; unique value other th=
an the &#8216;unique&#8217; index in SRGB(at least has such mechanism).<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; Practically=
, operators strongly desire to use common SRGBs.
 Vendors had resisted the push for using common SRGBs but now have given up=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Use of context-label=
 from a DCB can be comparable to the use of the &#8216;BIER-specific&#8217;=
 context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; There is no=
 need, and it is not desired to have a BIER-specific
 context. Besides, defining a new BIER header&#8217;s &#8220;proto&#8221; v=
alue to indicate a subsequent context label space should first be discussed=
 in BIER WG; if that passes, then we come back to (or at least involve) BES=
S WG to enhance MVPN/EVPN signaling so that every
 PE knows where to allocate labels and where to install forwarding state.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Use of &#8216;dynami=
c&#8217; allocation with DCB mechanism in segmented MVPN deployment may add=
 extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; Compared to=
 existing method of using upstream assigned labels,
 what is the complexity? Upstream assigned labels are assigned from the ass=
igner&#8217;s main/default label space; the &#8220;dynamic&#8221; allocatio=
n scheme in option-3 allocates from a label block (of a context label space=
 identified by a DCB label) assigned to the assigner.
 If the need to maintain that extra label block information is complicated,=
 wouldn&#8217;t it be more complicated to selectively install upstream-assi=
gned labels based on UMH selection (forget about that it would not work all=
 the time)?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span style=3D"font-size:12.0=
pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-f=
amily:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497=
D">Zzh</span></span><span style=3D"font-size:12.0pt;mso-bidi-font-size:11.0=
pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-fon=
t-family:&quot;Times New Roman&quot;;color:#1F497D">&gt;
 If that is not convincing enough, what is a better solution? I know you ha=
ve proposed doing IP lookup &#8211; we discussed in a separate thread on th=
e pros/cons of that and we&#8217;re working together on a separate draft on=
 that, right? I also have a short section 2.2.2.3
 on that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">I suggest this draft=
 to make more clear what the use cases are, what it really want to solve, a=
nd what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; The use cas=
es and problem domains are discussed in section 2.1,
 and more complicated scenarios are followed-up in section 2.2.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; About &#822=
0;what it don&#8217;t&#8221; &#8211; can you point out the areas that you
 think this draft should cover or explicitly declare out of scope?<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; Thanks.<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh2&gt; Jeffrey<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Thanks.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Jingrong<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> Jeffrey (=
Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">mailto:zzhang@juniper=
.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Jingr=
ong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Pleas=
e see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-outline-level:1"><b>From:</b> BESS &lt;=
<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Objec=
tion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; Please note th=
at this is not a LC for the draft. This is the poll for early allocation fo=
r the DCB-flag and an extended community type.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">I rem=
ember I have raised my concerns, but I didn&#8217;t find the response.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh&g=
t; Sorry for missing those. Please see below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Copy =
the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">The problem stated by this draft is valid, and the proposed method is us=
eful for some of the listed problem. For example, EVPN BUM who uses MPLS id=
entification and dataplane.
</span><span style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh&gt; Do you thin=
k the proposed solution is reasonable for the problems? If so, we would lik=
e to see early allocation is done. The allocation
 is temporary &#8211; it would time out after some time if the draft does n=
ot become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">EVPN BUM using vxlan/vni identification may not need a MPLS label to ide=
ntify the vpn/tenant.</span><span style=3D"font-size:10.5pt"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; The draft is a=
bout &#8220;aggregation label&#8221;, so vxlan/vni is irrelevant. On the ot=
her hand, in case of vxlan/vni, the VNI is no different from a DCB label in=
 concept (so the solution of using DCB label should
 be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, the =
exist using of upstream-assigned VpnLabel can be optimized to only populate=
 to forwarding-state when there are
 c-multicast flows selecting the specific UMH PE.</span><span style=3D"font=
-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; If that is a b=
etter solution, perhaps a separate draft can be written. The solution in th=
is draft is simpler and in concept no different from vxlan case.<o:p></o:p>=
</span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For an End-to-End deployment of MVPN who spans multi-ASes as the way sta=
ted in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the allocation of a=
 global-unique label is useful and possible.
 But operators may need to be very careful to allocate the very limited MPL=
S labels. Because, MPLS labels has been divided to SRLB and SRGB, and SRGB =
may have been again divided by SR-domains according to &lt;draft-filsfils-s=
pring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; What&#8217;s r=
elevant here is the second part of your text above (the &#8220;But operator=
s &#8230;&#8221;) &#8211; though that is the same point #5 below (please se=
e my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For segmented MVPN deployment, the further divide of the MPLS Label is a=
lso difficult when thinking of the above.</span><span style=3D"font-size:10=
.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; Please see sec=
tion 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnLab=
el ? or a Per-platform (RFC5331) downstream-assigned unique label ? &nbsp;i=
f it is the later one, how about adding a
 new BIER proto value to indicating a BIER-specific unique VpnLabel ? &nbsp=
;And then a static Context (BIER) can be optional to the dynamic advertisin=
g of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Zzh&g=
t; In BIER header, proto=3D1 indicates downstream-assigned label. There is =
no need to define a new BIER specific proto value. The reason is that &#822=
0;downstream-assigned label&#8221; just means that it
 is a label in the &#8220;main/default&#8221; label space of the receiving =
router, and a DCB label is just that. Nothing is BIER specific here. I beli=
eve Tony also responded to you (and in BIER WG).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Zzh&g=
t; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Zzh&g=
t; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> BESS [<a =
href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have received an early allocation request for the=
 draft-ietf-bess-mvpn-evpn-aggregation-label.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please raise your concerns if you object to this req=
uest and if you think that the document is not mature enough.<o:p></o:p></p=
>
<p class=3D"MsoNormal">Feel also free to support this request.<o:p></o:p></=
p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We will wait until next Monday (12/17) to gather fee=
dbacks.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">_____=
___________________________________________________________________________=
_________________________________________<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>=
&nbsp;</o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">Ce me=
ssage et ses pieces jointes peuvent contenir des informations confidentiell=
es ou privilegiees et ne doivent donc<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">pas e=
tre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce m=
essage par erreur, veuillez le signaler<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">a l'e=
xpediteur et le detruire ainsi que les pieces jointes. Les messages electro=
niques etant susceptibles d'alteration,<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">Orang=
e decline toute responsabilite si ce message a ete altere, deforme ou falsi=
fie. Merci.<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>=
&nbsp;</o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">This =
message and its attachments may contain confidential or privileged informat=
ion that may be protected by law;<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">they =
should not be distributed, used or copied without authorisation.<o:p></o:p>=
</span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">If yo=
u have received this email in error, please notify the sender and delete th=
is message and its attachments.<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">As em=
ails may be altered, Orange is not liable for messages that have been modif=
ied, changed or falsified.<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">Thank=
 you.<o:p></o:p></span></pre>
</div>
</div>
</div>
</body>
</html>

--_000_DM6PR05MB5036257964FBF48DB96FEA0FD4A00DM6PR05MB5036namp_--


From nobody Thu Dec 13 10:14:51 2018
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-bum-procedure-updates-05.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           : Updates on EVPN BUM Procedures
        Authors         : Zhaohui Zhang
                          Wen Lin
                          Jorge Rabadan
                          Keyur Patel
                          Ali Sajassi
	Filename        : draft-ietf-bess-evpn-bum-procedure-updates-05.txt
	Pages           : 19
	Date            : 2018-12-13

Abstract:
   This document specifies procedure updates for broadcast, unknown
   unicast, and multicast (BUM) traffic in Ethernet VPNs (EVPN),
   including selective multicast, and provider tunnel segmentation.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-bum-procedure-updates/

There are also htmlized versions available at:
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https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-bum-procedure-updates-05

A diff from the previous version is available at:
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Reviewer: Stephen Kent
Review result: Has Nits

 



BESS Workgroup                                       A. Sajassi (Editor)
INTERNET-DRAFT                                                  S. Salam
Intended Status: Standard Track                                    Cisco
                                                            N. Del Regno
                                                                 Verizon
                                                              J. Rabadan
                                                                   Nokia
                                                                        
Expires: May 27, 2019                                  November 27, 2018


            (PBB-)EVPN Seamless Integration with (PBB-)VPLS 
              draft-ietf-bess-evpn-vpls-seamless-integ-05


Abstract

   This draft specifies procedures for backward compatibility of
   Ethernet VPN (EVPN) and Provider Backbone Bridge Ethernet VPN (PBB-
   EVPN) solutions with Virtual Private LAN Service (VPLS) and Provider
   Backbone Bridge VPLS (PBB-VPLS) solutions (PBB-)VPLS. It also
   provides mechanisms for seamless integration of these two
   technologies in the same MPLS/IP network on a per-VPN-instance basis.
   Implementation of this draft enables service providers to introduce
   (PBB-)EVPN PEs in their brown-field deployments of (PBB-)VPLS
   networks.


Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html
 


Sajassi et al.            Expires May 27, 2019                  [Page 1]

INTERNET DRAFT  draft-ietf-bess-evpn-vpls-seamless-integ    Nov 27, 2019


Copyright and License Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document. Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document. Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.



Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Specification of Requirements  . . . . . . . . . . . . . .  4
     1.2.  Terms and Abbreviations  . . . . . . . . . . . . . . . . .  4
   2.  Requirements . . . . . . . . . . . . . . . . . . . . . . . . .  6
   3 VPLS Integration with EVPN . . . . . . . . . . . . . . . . . . .  6
     3.1 Capability Discovery . . . . . . . . . . . . . . . . . . . .  7
     3.2 Forwarding Setup and Unicast Operation . . . . . . . . . . .  7
     3.3 MAC Mobility . . . . . . . . . . . . . . . . . . . . . . . .  8
     3.4 Multicast Operation  . . . . . . . . . . . . . . . . . . . .  9
       3.4.1 Ingress Replication  . . . . . . . . . . . . . . . . . .  9
       3.4.2 P2MP Tunnel  . . . . . . . . . . . . . . . . . . . . . .  9
   4 PBB-VPLS Integration with PBB-EVPN . . . . . . . . . . . . . . . 10
     4.1 Capability Discovery . . . . . . . . . . . . . . . . . . . . 10
     4.2 Forwarding Setup and Unicast Operation . . . . . . . . . . . 10
     4.3 MAC Mobility . . . . . . . . . . . . . . . . . . . . . . . . 11
     4.4 Multicast Operation  . . . . . . . . . . . . . . . . . . . . 11
       4.4.1 Ingress Replication  . . . . . . . . . . . . . . . . . . 11
       4.4.2 P2MP Tunnel - Inclusive Tree . . . . . . . . . . . . . . 12
   5 Security Considerations  . . . . . . . . . . . . . . . . . . . . 12
   6  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 12
   7  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     7.1  Normative References  . . . . . . . . . . . . . . . . . . . 12
     7.2  Informative References  . . . . . . . . . . . . . . . . . . 13
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14





 


Sajassi et al.            Expires May 27, 2019                  [Page 2]

INTERNET DRAFT  draft-ietf-bess-evpn-vpls-seamless-integ    Nov 27, 2019


1  Introduction

   Virtual Private LAN Service (VPLS) and Provider Backbone Bridging
   VPLS (PBB-VPLS) are widely-deployed Layer-2 VPN (L2VPN) technologies.
   Many Service Providers (SPs) who are looking at adopting Ethernet VPN
   (EVPN) and Provider Backbone Bridging EVPN (PBB-EVPN) want to
   preserve their investment in the VPLS and PBB-VPLS networks. Hence,
   they require procedures by which EVPN and PBB-EVPN technology can be
   introduced into their brown-field VPLS and PBB-VPLS networks without
   requiring any upgrades (software or hardware) to these networks. This
   document specifies procedures for the seamless integration of the two
   technologies in the same MPLS/IP network. Throughout this document,
   we use the term (PBB-)EVPN to correspond to both EVPN and PBB-EVPN
   and we use the term (PBB-)VPLS to correspond to both VPLS and PBB-
   VPLS.

                            VPLS PE
                             +---+   
                             |PE1|
                             +---+
                               /
        EVPN/VPLS PE  +---------------+   EVPN/VPLS PE     
             +---+    |               |   +---+
             |PE4|----|    MPLS/IP    |---|PE5|
             +---+    |     Core      |   +---+
                      |               |
                      +---------------+     
                        /        \
                     +---+     +---+ 
                     |PE2|     |PE3|
                     +---+     +---+       
                   VPLS PE     VPLS PE

       Figure 1: Seamless Integration of (PBB-)EVPN & (PBB-)VPLS

   Section 2 provides the details of the requirements. Section 3
   specifies procedures for the seamless integration of VPLS and EVPN
   networks. And section 4 specifies procedures for the seamless
   integration of PBB-VPLS and PBB-EVPN networks. 

   It should be noted that the scenarios for PBB-VPLS integration with
   EVPN and VPLS integration with PBB-EVPN are not covered in this
   document because there haven't been any requirements from service
   providers for these scenarios. The reason for that is that
   deployments which employ PBB-VPLS typically require PBB encapsulation
   for various reasons. Hence, it is expected that for those deployments
   the evolution path would be from PBB-VPLS towards PBB-EVPN.
   Furthermore, the evolution path from VPLS is expected to be towards
 


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   EVPN.

   The seamless integration solution described in this document has the
   following attributes: 

   - When ingress replication is used for multi-destination traffic
   delivery, the solution reduces the scope of [MMRP] (which is a soft-
   state protocol) to only that of existing VPLS PEs, and uses the more
   robust BGP-based mechanism for multicast pruning among new EVPN PEs.

   - It is completely backward compatible.

   - New PEs can leverage the extensive multi-homing mechanisms and
   provisioning simplifications of (PBB-)EVPN:
      a. Auto-sensing of MHN / MHD
      b. Auto-discovery of redundancy group
      c. Auto-provisioning of Designated Forwarder election and 
         VLAN carving

1.1.  Specification of Requirements

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

1.2.  Terms and Abbreviations

   Broadcast Domain:  In a bridged network, the broadcast domain
   corresponds to a Virtual LAN (VLAN), where a VLAN is typically
   represented by a single VLAN ID (VID) but can be represented by
   several VIDs where Shared VLAN Learning (SVL) is used per
   [IEEE.802.1ah].

   Bridge Table:  An instantiation of a broadcast domain on a MAC-VRF

   RIB: Routing Information Base - An instantiation of a routing table
   on a MAC-VRF

   FIB: Forwarding Information Base - An instantiation of a forwarding
   table on a MAC-VRF

   CE:  A Customer Edge device, e.g., a host, router, or switch.

   MAC-VRF:  A Virtual Routing and Forwarding table for Media Access
   Control (MAC) addresses on an EVPN PE.

 


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   MAC address: Media Access Control address

   C-MAC address: Customer MAC address - e.g., host or CE's MAC address 

   B-MAC address: Backbone MAC address - e.g., PE's MAC address

   Ethernet segment (ES): Refers to the set of Ethernet links that
   connects a customer site (device or network) to one or more PEs.

   Ethernet Tag:  An Ethernet Tag identifies a particular broadcast
   domain, e.g., a VLAN.  An EVPN instance consists of one or more
   broadcast domains

   MHD: Multi-Homed Device

   MHN: Multi-Homed Network

   P2MP:  Point-to-Multipoint

   PBB: Provider Backbone Bridge

   PE:  Provider Edge device

   VSI: Virtual Switch Instance 

   VPLS: Virtual Private LAN Service

   Single-Active Redundancy Mode: When only a single PE, among all the
   PEs attached to an Ethernet segment, is allowed to forward traffic
   to/from that Ethernet segment for a given VLAN, then the Ethernet
   segment is defined to be operating in Single-Active redundancy mode.

   All-Active Redundancy Mode: When all PEs attached to an Ethernet
   segment are allowed to forward known unicast traffic to/from that
   Ethernet segment for a given VLAN, then the Ethernet segment is
   defined to be operating in All-Active redundancy mode.

   (PBB-)EVPN: refers to both, PBB-EVPN and EVPN. This document uses
   this abbreviation when a given description applies to both
   technologies.

   (PBB-)VPLS: refers to both, PBB-VPLS and VPLS. As for EVPN, this
   abbreviation is used when the text applies to both technologies.

   VPLS A-D: refers to Virtual Private LAN Services with BGP-based Auto
   Discovery as in [RFC6074].

   PW: Pseudowire
 


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   I-SID: Ethernet Services Instance Identifier


2.  Requirements

   Following are the key requirements for backward compatibility between
   (PBB-)EVPN and (PBB-)VPLS:

   1. The solution MUST allow for staged migration towards (PBB-)EVPN on
   a site-by-site basis per VPN instance - e.g., new EVPN sites to be
   provisioned on (PBB-)EVPN Provider Edge devices (PEs).

   2. The solution MUST require no changes to existing VPLS or PBB-VPLS
   PEs, not even a software upgrade.

   3. The solution MUST allow for the coexistence of PEs running (PBB-
   )EVPN and (PBB-)VPLS for the same VPN instance and single-homed
   segments.

   4. The solution MUST support single-active redundancy of multi-homed
   networks and multi-homed devices for (PBB-)EVPN PEs.

   5. In case of single-active redundancy, the participant VPN instances
   MAY span across both (PBB-)EVPN PEs and (PBB-)VPLS PEs as long as the
   MHD or MHN is connected to (PBB-)EVPN PEs. In case of an ES link
   failure, the (PBB-)EVPN PEs will send a BGP mass-withdraw to the EVPN
   peers OR MAC advertisement with MAC Mobility extended community for
   PBB-EVPN AND follow existing VPLS MAC Flush procedures with the VPLS
   peers.

   6. The support of All-Active redundancy mode across both (PBB-)EVPN
   PEs and (PBB-)VPLS PEs is outside the scope of this document. 


   These requirements collectively allow for the seamless insertion of
   the (PBB-)EVPN technology into brown-field (PBB-)VPLS deployments.

3 VPLS Integration with EVPN

   In order to support seamless integration with VPLS PEs, this document
   requires that VPLS PEs support VPLS A-D per [RFC6074] and EVPN PEs
   support both BGP EVPN routes per [RFC7432] and VPLS A-D per
   [RFC6074]. All the logic for seamless integration shall reside on the
   EVPN PEs. If a VPLS instance is setup without the use of VPLS A-D, it
   is still possible (but cumbersome) for EVPN PEs to integrate into
   that VPLS instance by manually configuring Pseudowires (PWs) to all
   the VPLS PEs in that instance (i.e., the integration is no longer
   seamless).
 


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3.1 Capability Discovery

   The EVPN PEs MUST advertise both the BGP VPLS Auto-Discovery (A-D)
   route as well as the BGP EVPN Inclusive Multicast Ethernet Tag (IMET)
   route for a given VPN instance. The VPLS PEs only advertise the BGP
   VPLS A-D route, per the procedures specified in [RFC4761], [RFC4762]
   and [RFC6074]. The operator may decide to use the same Route Target
   (RT) to identify a VPN on both EVPN and VPLS networks. In this case,
   when a VPLS PE receives the EVPN IMET route, it MUST ignore it on the
   basis that it belongs to an unknown SAFI. However, the operator may
   choose to use two RTs - one to identify the VPN on VPLS network and
   another for EVPN network and employ RT-constrained [RFC4684] in order
   to prevent BGP EVPN routes from reaching the VPLS PEs. 

   When an EVPN PE receives both a VPLS A-D route as well as an EVPN
   IMET route from a given remote PE for the same VPN instance, it MUST
   give preference to the EVPN route for the purpose of discovery. This
   ensures that, at the end of the route exchanges, all EVPN capable PEs
   discover other EVPN capable PEs in addition to the VPLS-only PEs for
   that VPN instance. Furthermore, all the VPLS-only PEs will discover
   the EVPN PEs as if they were standard VPLS PEs. In other words, when
   the discovery phase is complete, the EVPN PEs will have discovered
   all the PEs in the VPN instance along with their associated
   capability (EVPN or VPLS-only), whereas the VPLS PEs will have
   discovered all the PEs in the VPN instance as if they were all VPLS-
   only PEs.


3.2 Forwarding Setup and Unicast Operation

   The procedures for forwarding state setup and unicast operation on
   the VPLS PE are per [RFC8077], [RFC4761], [RFC4762]. 

   The procedures for forwarding state setup and unicast operation on
   the EVPN PE are as follows:

   - The EVPN PE MUST establish a PW to each remote PE from which it has
   received only a VPLS A-D route for the corresponding VPN instance,
   and MUST set up the label stack corresponding to the PW FEC. For
   seamless integration between EVPN and VPLS PEs, the PW that is setup
   between a pair of VPLS and EVPN PEs is between the VSI of the VPLS PE
   and the MAC-VRF of the EVPN PE.  

   - The EVPN PE must set up the label stack corresponding to the MP2P
   VPN unicast FEC to any remote PE that has advertised EVPN IMET route.

   - If an EVPN PE receives a VPLS A-D route from a given PE, it sets up
   a PW to that PE. If it then receives an EVPN IMET route from the same
 


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   PE, then the EVPN PE MUST bring that PW operationally down.

   - If an EVPN PE receives an EVPN IMET route followed by a VPLS A-D
   route from the same PE, then the EVPN PE will setup the PW but MUST
   keep it operationally down. 

   - In case VPLS AD is not used in some VPLS PEs, the EVPN PEs need to
   be provisioned manually with PWs to those remote VPLS PEs for each
   VPN instance. In that case, if an EVPN PE receives an EVPN IMET route
   from a PE to which a PW exists, the EVPN PE MUST bring the PW
   operationally down.

   When the EVPN PE receives traffic over the VPLS PWs, it learns the
   associated C-MAC addresses in the data-plane. The C-MAC addresses
   learned over these PWs MUST be injected into the bridge table of the
   associated MAC-VRF on that EVPN PE. The learned C-MAC addresses MAY
   also be injected into the RIB/FIB tables of the associated MAC-VRF on
   that EVPN PE. For seamless integration between EVPN and VPLS PEs,
   since these PWs belong to the same split-horizon group as the MP2P
   EVPN service tunnels, then the C-MAC addresses learned and associated
   to the PWs MUST NOT be advertised in the control plane to any remote
   EVPN PEs. This is because every EVPN PE can send and receive traffic
   directly to/from every VPLS PE belonging to the same VPN instance.

   The C-MAC addresses learned over local Attachment Circuits (ACs) by
   an EVPN PE are learned in data-plane. For EVPN PEs, these C-MAC
   addresses MUST be injected into the corresponding MAC-VRF and
   advertised in the control-plane using BGP EVPN routes. Furthermore,
   the C-MAC addresses learned in the control plane via the BGP EVPN
   routes sent by remote EVPN PEs, are injected into the corresponding
   MAC-VRF table.

3.3 MAC Mobility

   In EVPN, host addresses (C-MAC addresses) can move around among EVPN
   PEs or even between EVPN and VPLS PEs.  

   When a C-MAC address moves from an EVPN PE to a VPLS PE, then as soon
   as Broadcast/Unknown-unicast/Multicast (BUM) traffic is initiated
   from that MAC address, it is flooded to all other PEs (both VPLS and
   EVPN PEs) and the receiving PEs update their MAC tables (VSI or MAC-
   VRF). The EVPN PEs do not advertise the C-MAC addresses learned over
   the PW to each other because every EVPN PE learns them directly over
   its associated PW to that VPLS PE. If only known-unicast traffic is
   initiated from the moved C-MAC address toward a known C-MAC, then
   this can result in black-holing of traffic destined to the C-MAC that
   has moved until there is a BUM traffic originated with the moved C-
   MAC address as the source MAC address (e.g., as a result of MAC age-
 


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   out timer expires). Note that this is behavior typical of VPLS PEs. 

   When a C-MAC address moves from a VPLS PE to an EVPN PE, then as soon
   as BUM or known-unicast traffic is initiated from that C-MAC address,
   the C-MAC is learned and advertised in BGP to other EVPN PEs and MAC
   mobility procedure is exercised among EVPN PEs. For BUM traffic, both
   EVPN and VPLS PEs learn the new location of the moved C-MAC address;
   however, if there is only known-unicast traffic, then only EVPN PEs
   learn the new location of the C-MAC that has moved but not VPLS PEs.
   This can result in black-holing of traffic sent from VPLS PEs
   destined to the C-MAC that has moved until there is a BUM traffic
   originated with the moved C-MAC address as the source MAC address
   (e.g., as a result of MAC age-out timer expires). Note that this is
   behavior typical of VPLS PEs.


3.4 Multicast Operation

3.4.1 Ingress Replication

   The procedures for multicast operation on the VPLS PE, using ingress
   replication, are per [RFC4761], [RFC4762], and [RFC7080].

   The procedures for multicast operation on the EVPN PE, for ingress
   replication, are as follows:

   - The EVPN PE builds a replication sub-list to all the remote EVPN
   PEs per EVPN instance as the result of the exchange of the EVPN IMET
   routes per [RFC7432]. This will be referred to as sub-list A. It
   comprises MP2P service tunnels used for delivering EVPN BUM traffic
   [RFC7432].

   - The EVPN PE builds a replication sub-list per VPLS instance to all
   the remote VPLS PEs. This will be referred to as sub-list B. It
   comprises PWs from the EVPN PE in question to all the remote VPLS PEs
   in the same VPLS instance.

   The replication list, maintained per VPN instance, on a given EVPN PE
   will be the union of sub-list A and sub-list B. Note that the PE must
   enable split-horizon over all the entries in the replication list,
   across both PWs and MP2P service tunnels.

3.4.2 P2MP Tunnel

   The procedures for multicast operation on the EVPN PEs using P2MP
   tunnels are outside of the scope of this document. 


 


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4 PBB-VPLS Integration with PBB-EVPN

   In order to support seamless integration between PBB-VPLS and PBB-
   EVPN PEs, this document requires that PBB-VPLS PEs support VPLS A-D
   per [RFC6074] and PBB-EVPN PEs support both BGP EVPN routes per
   [RFC7432] and VPLS A-D per [RFC6074]. All the logic for this seamless
   integration shall reside on the PBB-EVPN PEs.

4.1 Capability Discovery

   The procedures for capability discovery are per Section 3.1 above.

4.2 Forwarding Setup and Unicast Operation

   The procedures for forwarding state setup and unicast operation on
   the PBB-VPLS PE are per [RFC8077] and [RFC7080]. 

   The procedures for forwarding state setup and unicast operation on
   the PBB-EVPN PE are as follows:

   - The PBB-EVPN PE MUST establish a PW to each remote PBB-VPLS PE from
   which it has received only a VPLS A-D route for the corresponding VPN
   instance, and MUST set up the label stack corresponding to the PW
   FEC. For seamless integration between PBB-EVPN and PBB-VPLS PEs, the
   PW that is setup between a pair of PBB-VPLS and PBB-EVPN PEs, is
   between B-components of PBB-EVPN PE and PBB-VPLS PE per section 4 of 
   [RFC7041].  

   - The PBB-EVPN PE must set up the label stack corresponding to the
   MP2P VPN unicast FEC to any remote PBB-EVPN PE that has advertised
   EVPN IMET route.

   - If a PBB-EVPN PE receives a VPLS A-D route from a given PE, it sets
   up a PW to that PE. If it then receives an EVPN IMET route from the
   same PE, then the PBB-EVPN PE MUST bring that PW operationally down.

   - If a PBB-EVPN PE receives an EVPN IMET route followed by a VPLS A-D
   route from the same PE, then the PBB-EVPN PE will setup the PW but
   MUST keep it operationally down. 

   - In case VPLS AD is not used in some PBB-VPLS PEs, the PBB-EVPN PEs
   need to be provisioned manually with PWs to those remote PBB-VPLS PEs
   for each VPN instance. In that case, if a PBB-EVPN PE receives an
   EVPN IMET route from a PE to which a PW exists, the PBB-EVPN PE MUST
   bring the PW operationally down.

   - When the PBB-EVPN PE receives traffic over the PBB-VPLS PWs, it
   learns the associated B-MAC addresses in the data-plane. The B-MAC
 


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   addresses learned over these PWs MUST be injected into the bridge
   table of the associated MAC-VRF on that PBB-EVPN PE. The learned B-
   MAC addresses MAY also be injected into the RIB/FIB tables of the
   associated the MAC-VRF on that BPP-EVPN PE. For seamless integration
   between PBB-EVPN and PBB-VPLS PEs, since these PWs belongs to the
   same split-horizon group as the MP2P EVPN service tunnels, then the
   B-MAC addresses learned and associated to the PWs MUST NOT be
   advertised in the control plane to any remote PBB-EVPN PEs. This is
   because every PBB-EVPN PE can send and receive traffic directly
   to/from every PBB-VPLS PE belonging to the same VPN instance.

   - The C-MAC addresses learned over local Attachment Circuits (ACs) by
   an PBB-EVPN PE are learned in data-plane. For PBB-EVPN PEs, these C-
   MAC addresses are learned in I-component of PBB-EVPN PEs and they are
   not advertised in the control-plane per [RFC7623].

   - The B-MAC addresses learned in the control plane via the BGP EVPN
   routes sent by remote PBB-EVPN PEs, are injected into the
   corresponding MAC-VRF table.


4.3 MAC Mobility

   In PBB-EVPN, a given B-MAC address can be learnt either over the BGP
   control-plane from a remote PBB-EVPN PE, or in the data-plane over a
   PW from a remote PBB-VPLS PE. There is no mobility associated with B-
   MAC addresses in this context. Hence, when the same B-MAC address
   shows up behind both a remote PBB-VPLS PE as well as a PBB-EVPN PE,
   the local PE can deduce that it is an anomaly and SHOULD notify the
   operator.

4.4 Multicast Operation

4.4.1 Ingress Replication

   The procedures for multicast operation on the PBB-VPLS PE, using
   ingress replication, are per [RFC7041] and [RFC7080].

   The procedures for multicast operation on the PBB-EVPN PE, for
   ingress replication, are as follows:

   - The PBB-EVPN PE builds a replication sub-list per I-SID to all the
   remote PBB-EVPN PEs in a given VPN instance as a result of the
   exchange of the EVPN IMET routes, as described in [RFC7623]. This
   will be referred to as sub-list A. It comprises MP2P service tunnels
   used for delivering PBB-EVPN BUM traffic.

   - The PBB-EVPN PE builds a replication sub-list per VPN instance to
 


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   all the remote PBB-VPLS PEs. This will be referred to as sub-list B.
   It comprises PWs from the PBB-EVPN PE in question to all the remote
   PBB-VPLS PEs in the same VPN instance.

   - The PBB-EVPN PE may further prune sub-list B, on a per I-SID basis,
   by running [MMRP] over the PBB-VPLS network. This will be referred to
   as sub-list C. This list comprises a pruned set of the PWs in the
   sub-list B.

   The replication list maintained per I-SID on a given PBB-EVPN PE will
   be the union of sub-list A and sub-list B if [MMRP] is not used, and
   the union of sub-list A and sub-list C if [MMRP] is used. Note that
   the PE must enable split-horizon over all the entries in the
   replication list, across both pseudowires and MP2P service tunnels.

4.4.2 P2MP Tunnel - Inclusive Tree

   The procedures for multicast operation on the PBB-EVPN PEs using P2MP
   tunnels are outside of the scope of this document.


5 Security Considerations

   All the security considerations in [RFC4761], [RFC4762], [RFC7080],
   [RFC7432], and [RFC7623] apply directly to this document because this
   document leverages the control plane and the data plane procedures
   described in these RFCs.

   This document does not introduce any new security considerations
   beyond that of the above RFCs because the advertisements and
   processing of MAC addresses in BGP follow that of [RFC7432] and
   processing of MAC addresses learned over PWs follow that of
   [RFC4761], [RFC4762], and [RFC7080]. 


6  IANA Considerations

   This document has no actions for IANA.


7  References

7.1  Normative References


   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, DOI
              10.17487/RFC2119, March <https://www.rfc-
 


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              editor.org/info/rfc2119>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8077] Martini, et al., "Pseudowire Setup and Maintenance using
              the Label Distribution Protocol", RFC 8077, February 2017.

   [RFC7432] Sajassi et al., "BGP MPLS Based Ethernet VPN", RFC 7432,
              February, 2015.

   [RFC7623] Sajassi et al., "Provider Backbone Bridging Combined with
              Ethernet VPN (PBB-EVPN)", RFC 7623, September, 2015.

   [RFC4761] Kompella, K., Ed., and Y. Rekhter, Ed., "Virtual Private
              LAN Service (VPLS) Using BGP for Auto-Discovery and
              Signaling", RFC 4761, January 2007, <http://www.rfc-
              editor.org/info/rfc4761>.

   [RFC4762]  Lasserre, M., Ed., and V. Kompella, Ed., "Virtual Private
              LAN Service (VPLS) Using Label Distribution Protocol (LDP)
              Signaling", RFC 4762, January 2007, <http://www.rfc-
              editor.org/info/rfc4762>.

   [RFC6074] Rosen et al., "Provisioning, Auto-Discovery, and Signaling
              in Layer 2 Virtual Private Networks (L2VPNs)", RFC 6074,
              January 2011.


7.2  Informative References


   [MMRP] Clause 10 of "IEEE Standard for Local and metropolitan area
   networks - Media Access Control (MAC) Bridges and Virtual Bridged
   Local Area Networks", IEEE Std 802.1Q, 2013.

   [RFC7041] Balus et al., "Extensions to VPLS PE model for Provider
   Backbone Bridging", RFC 7041, November 2013.

   [RFC7080] Sajassi et al., "VPLS Interoperability with Provider
   Backbone Bridges", RFC 7080, December, 2013.

   [IEEE.802.1ah] IEEE, "IEEE Standard for Local and metropolitan area
   networks - Media Access Control (MAC) Bridges and Virtual Bridged
   Local Area Networks", Clauses 25 and 26, IEEE Std 802.1Q, DOI
   10.1109/IEEESTD.2011.6009146.

 


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   [RFC4684] Marques et al., "Constrained Route Distribution for Border
   Gateway Protocol/MultiProtocol Label Switching (BGP/MPLS) Internet
   Protocol (IP) Virtual Private Networks (VPNs)", RFC 4684, November,
   2006.



Authors' Addresses


   Ali Sajassi
   Cisco
   Email: sajassi@cisco.com


   Samer Salam
   Cisco
   Email: ssalam@cisco.com


   Nick Del Regno
   Verizon
   Email: nick.delregno@verizon.com


   Jorge Rabadan
   Nokia
   Email: jorge.rabadan@nokia.com























Sajassi et al.            Expires May 27, 2019                 [Page 14]



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From: Xiejingrong <xiejingrong@huawei.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi Jeffrey,

Please see xjr3>> below.

From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Thursday, December 13, 2018 10:32 PM
To: Xiejingrong <xiejingrong@huawei.com>; stephane.litkowski@orange.com; be=
ss@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jingrong,

Please see zzh2> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Wednesday, December 12, 2018 9:24 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess=
@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net<mailto:zzhang@juniper.net=
>>; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.

Zzh2> So I assume you're not objecting to the early allocation for DCB-flag=
 at least?
XJR3>> I don't understand how a DCB-flag in PTA is necessary in opinion-1. =
 Does it used to do consistency check ?

But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?

Zzh2> Nowadays with the adoption of SR, allocating SAME SRGBs across router=
s is not difficult and is the preferred way. If you use DCB (could just be =
the SRGB itself) for non-segmented case, what's the concern with allocating=
 a context label from the DCB/SRGB? See later comment about BIER-context.
XJR3>> OK for non-segmented case (mainly intra-area, at least intra-AS case=
).

For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

Zzh2> There is no 3a. There could be multiple DCB labels for multiple conte=
xt label spaces, either because of scaling requirement (in theory) or for w=
hatever reason an operator wants to use multiple.
Zzh2> I don't think selectively installing upstream assigned labels based o=
n UMH is good enough (and it introduces more complexity). The sources could=
 be everywhere, and in case of EVPN, the forwarding could be (*,g) based, s=
o you'll end up with the original problem.
XJR3>> OK. Thanks for the clarification.
XJR3>> For segmented case stated in this opinion, the section 2.2.2.1 state=
d that, it does not address the original scaling issue.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.

Zzh2> If one can do common SRGB for SR, then one can do DCB for MVPN/EVPN. =
If you're still concerned with that, you can have a separate context label =
space for EVPN/MVPN purpose, with the context label from the DCB/SRGB. I do=
n't want to tie it to BIER only though, because the problem and solution eq=
ually applies to P2MP tunnels.
XJR3>> Yes, good enough to use in intra-AS/intra-area cases for DCB/SRGB. F=
or Inter-area/inter-AS case, I hope it can to help non-segmented MVPN deplo=
yment but I am worrying about that.

DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).

Zzh2> Practically, operators strongly desire to use common SRGBs. Vendors h=
ad resisted the push for using common SRGBs but now have given up.
XJR3>> I guess the acceptance of SRGB may not occur if the "safety belt" is=
 not invented. Anyway, I feel worried that, even a small DCB block can be d=
ifficult in case out of intra-AS/intra-area scope.

Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.

Zzh2> There is no need, and it is not desired to have a BIER-specific conte=
xt. Besides, defining a new BIER header's "proto" value to indicate a subse=
quent context label space should first be discussed in BIER WG; if that pas=
ses, then we come back to (or at least involve) BESS WG to enhance MVPN/EVP=
N signaling so that every PE knows where to allocate labels and where to in=
stall forwarding state.
XJR3>> OK.  BIER has the proto field for easily extending, we can move this=
 discussion to BIER or personally.

Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

Zzh2> Compared to existing method of using upstream assigned labels, what i=
s the complexity? Upstream assigned labels are assigned from the assigner's=
 main/default label space; the "dynamic" allocation scheme in option-3 allo=
cates from a label block (of a context label space identified by a DCB labe=
l) assigned to the assigner. If the need to maintain that extra label block=
 information is complicated, wouldn't it be more complicated to selectively=
 install upstream-assigned labels based on UMH selection (forget about that=
 it would not work all the time)?
XJR3>> For non-segmented aggregrated-P2MP or MP2MP deployment, I was convin=
ced to believe it is useful even introducing the extra protocol extension (=
see IANA part of the draft).
XJR3>> If I understand correctly, the data-plane also have some change too.=
 A VPN need to be identified by a DCB-context-label (to identify the follow=
ing label is not from a main/default space), and a following COMMON vpn lab=
el. It is not common in current MPLS world and may need some change in data=
-plane.

Zzh> If that is not convincing enough, what is a better solution? I know yo=
u have proposed doing IP lookup - we discussed in a separate thread on the =
pros/cons of that and we're working together on a separate draft on that, r=
ight? I also have a short section 2.2.2.3 on that.
XJR3>> I am not convinced to follow the DCB-context-label for BIER or for S=
egmented MVPN case.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Zzh2> The use cases and problem domains are discussed in section 2.1, and m=
ore complicated scenarios are followed-up in section 2.2.
Zzh2> About "what it don't" - can you point out the areas that you think th=
is draft should cover or explicitly declare out of scope?

XJR3>> the section 2.2.2.1 stated that, "it does not address the original s=
caling issue". I just feel that, the draft can remove the segmented case ou=
t of the DCB-context-label solution if it does not match well (though it ma=
y work).
XJR3>> So does the case of MVPN/EVPN using BIER.
XJR3>> Thanks.
XJR3>> Jingrong

Zzh2> Thanks.
Zzh2> Jeffrey


Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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</head>
<body lang=3D"ZH-CN" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi Jeffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Please see
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:blue">xjr3&gt;&=
gt;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D"> be=
low.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:32 PM<br>
<b>To:</b> Xiejingrong &lt;xiejingrong@huawei.com&gt;; stephane.litkowski@o=
range.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Hi Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh2&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Wednesday, December 12, 2018 9:24 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">s/inter-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Xiejingrong
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:9.0pt">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Let m=
e take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In sum=
mary, labels can be allocated and advertised the following<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from the DCB.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication that they are=
 from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from a few<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; common context label spaces,
</span><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;co=
lor:red">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</span><span lang=
=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp; =
PEs advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels along with the context-identifying labels.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbs=
p; A central authority assigns disjoint label blocks from those a //<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allocate labels =
from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbsp; Each PE a=
llocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels from its assigned label block independently for it=
s<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-identifying labe=
ls.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option=
 1 is simplest, but it requires that all the PEs set aside a<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common=
 label block for the DCB that is large enough for all the<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/B=
Ds/ESes combined.&nbsp; Option 3 is needed only for segmented<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; select=
ive tunnels that are set up dynamically.&nbsp; Multiple options<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could =
be used in any combination depending on the deployment<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situat=
ion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Optio=
n-1 is simplest and I like it very much (anyone who don&#8217;t like simpli=
fication?). For Inter-area EVPN deployment scenarios, it is strong and simp=
le enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; So I assume you&#8217;re not objecting to the early allo=
cation for DCB-flag at least?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; I don&#8217;t understand how a DCB-flag in PTA is neces=
sary in opinion-1. &nbsp;Does it used to do consistency check ?</span><span=
 lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">But w=
hen it is not the suitable case, and Option-2 has to be used, I think thing=
s are becoming complex: You still need a DCB from &#8216;main/default&#8217=
; label-space, though this DCB is very small, which
 maybe only include ONE label. And then the ONE label is used as &#8216;con=
text-label&#8217;. While for BIER case, BIER header itself can act as a &#8=
216;BIER-Context&#8217; naturally. Am I understanding correctly ?<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Nowadays with the adoption of SR, allocating SAME SRGBs =
across routers is not difficult and is the preferred way. If you use DCB (c=
ould just be the SRGB itself) for non-segmented
 case, what&#8217;s the concern with allocating a context label from the DC=
B/SRGB? See later comment about BIER-context.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; OK for non-segmented case (mainly intra-area, at least =
intra-AS case).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">For O=
ption-3, I do understand it as two sub-options, Option-3a if there is enoug=
h number of Labels in the DCB, and Option-3b if there isn&#8217;t and the O=
NE &#8216;DCB&#8217; label is used as context-label. Each
 one is difficult for me to consider the development and deployment. One th=
e other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechanism to=
 select the right upstream-assigned VpnLabel to download to forwarding stat=
es.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; There is no 3a. There could be multiple DCB labels for m=
ultiple context label spaces, either because of scaling requirement (in the=
ory) or for whatever reason an operator wants
 to use multiple.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; I don&#8217;t think selectively installing upstream assi=
gned labels based on UMH is good enough (and it introduces more complexity)=
. The sources could be everywhere, and in case
 of EVPN, the forwarding could be (*,g) based, so you&#8217;ll end up with =
the original problem.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; OK. Thanks for the clarification.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; For segmented case stated in this opinion, the section =
2.2.2.1 stated that, it does not address the original scaling issue.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">So my=
 summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to VNI very much, but the MPLS labels in the &#8220;main/default&=
#8221; space is very costly due to the &#8216;per-platform&#8217; (RFC5331)=
 allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; If one can do common SRGB for SR, then one can do DCB fo=
r MVPN/EVPN. If you&#8217;re still concerned with that, you can have a sepa=
rate context label space for EVPN/MVPN purpose,
 with the context label from the DCB/SRGB. I don&#8217;t want to tie it to =
BIER only though, because the problem and solution equally applies to P2MP =
tunnels.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; Yes, good enough to use in intra-AS/intra-area cases fo=
r DCB/SRGB. For Inter-area/inter-AS case, I hope it can to help non-segment=
ed MVPN deployment but I am worrying about that.</span><span lang=3D"EN-US"=
 style=3D"font-size:12.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to SRGB very much, but DCB requires &#8216;absolute&#8217; unique=
 value other than the &#8216;unique&#8217; index in SRGB(at least has such =
mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Practically, operators strongly desire to use common SRG=
Bs. Vendors had resisted the push for using common SRGBs but now have given=
 up.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; I guess the acceptance of SRGB may not occur if the &#8=
220;safety belt&#8221; is not invented. Anyway, I feel worried that, even a=
 small DCB block can be difficult in case out of intra-AS/intra-area
 scope.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f context-label from a DCB can be comparable to the use of the &#8216;BIER-=
specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; There is no need, and it is not desired to have a BIER-s=
pecific context. Besides, defining a new BIER header&#8217;s &#8220;proto&#=
8221; value to indicate a subsequent context label space should
 first be discussed in BIER WG; if that passes, then we come back to (or at=
 least involve) BESS WG to enhance MVPN/EVPN signaling so that every PE kno=
ws where to allocate labels and where to install forwarding state.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; OK. &nbsp;BIER has the proto field for easily extending=
, we can move this discussion to BIER or personally.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f &#8216;dynamic&#8217; allocation with DCB mechanism in segmented MVPN dep=
loyment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Compared to existing method of using upstream assigned l=
abels, what is the complexity? Upstream assigned labels are assigned from t=
he assigner&#8217;s main/default label space; the
 &#8220;dynamic&#8221; allocation scheme in option-3 allocates from a label=
 block (of a context label space identified by a DCB label) assigned to the=
 assigner. If the need to maintain that extra label block information is co=
mplicated, wouldn&#8217;t it be more complicated to
 selectively install upstream-assigned labels based on UMH selection (forge=
t about that it would not work all the time)?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; For non-segmented aggregrated-P2MP or MP2MP deployment,=
 I was convinced to believe it is useful even introducing the extra protoco=
l extension (see IANA part of the draft).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; If I understand correctly, the data-plane also have som=
e change too. A VPN need to be identified by a DCB-context-label (to identi=
fy the following label is not from a main/default
 space), and a following COMMON vpn label. It is not common in current MPLS=
 world and may need some change in data-plane.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; If that is not convincing enough, what is a better soluti=
on? I know you have proposed doing IP lookup &#8211; we discussed in a sepa=
rate thread on the pros/cons of that and we&#8217;re
 working together on a separate draft on that, right? I also have a short s=
ection 2.2.2.3 on that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt;
</span><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:blue">I am not =
convinced to follow the DCB-context-label for BIER or for Segmented MVPN ca=
se.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">I sug=
gest this draft to make more clear what the use cases are, what it really w=
ant to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; The use cases and problem domains are discussed in secti=
on 2.1, and more complicated scenarios are followed-up in section 2.2.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; About &#8220;what it don&#8217;t&#8221; &#8211; can you =
point out the areas that you think this draft should cover or explicitly de=
clare out of scope?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; the section 2.2.2.1 stated that, &#8220;it does not add=
ress the original scaling issue&#8221;. I just feel that, the draft can rem=
ove the segmented case out of the DCB-context-label solution
 if it does not match well (though it may work).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; So does the case of MVPN/EVPN using BIER.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; Thanks.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Thank=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">=
mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please note that this is not a LC for the draft. This is the poll for earl=
y allocation for the DCB-flag and an extended community type.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I remember I have raised my concerns, but I didn&#8217;t find the=
 response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; Sorry for missing those. Please see below.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Copy the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">The problem stated by this draft is valid, and the propos=
ed method is useful for some of the listed problem. For example, EVPN BUM w=
ho uses MPLS identification and dataplane.
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D">Zzh&=
gt; Do you think the proposed solution is reasonable for the problems? If s=
o, we would like to see early allocation is
 done. The allocation is temporary &#8211; it would time out after some tim=
e if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">EVPN BUM using vxlan/vni identification may not need a MP=
LS label to identify the vpn/tenant.</span><span lang=3D"EN-US" style=3D"fo=
nt-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 The draft is about &#8220;aggregation label&#8221;, so vxlan/vni is irrele=
vant. On the other hand, in case of vxlan/vni, the VNI is no different from=
 a DCB label in concept (so the solution of using DCB
 label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For MVPN who has a UMH(Upstream Multicast Hop) selection =
procedure, the exist using of upstream-assigned VpnLabel can be optimized t=
o only populate to forwarding-state
 when there are c-multicast flows selecting the specific UMH PE.</span><spa=
n lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 If that is a better solution, perhaps a separate draft can be written. The=
 solution in this draft is simpler and in concept no different from vxlan c=
ase.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For an End-to-End deployment of MVPN who spans multi-ASes=
 as the way stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the =
allocation of a global-unique label is useful
 and possible. But operators may need to be very careful to allocate the ve=
ry limited MPLS labels. Because, MPLS labels has been divided to SRLB and S=
RGB, and SRGB may have been again divided by SR-domains according to &lt;dr=
aft-filsfils-spring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 What&#8217;s relevant here is the second part of your text above (the &#82=
20;But operators &#8230;&#8221;) &#8211; though that is the same point #5 b=
elow (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For segmented MVPN deployment, the further divide of the =
MPLS Label is also difficult when thinking of the above.</span><span lang=
=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For BIER, is the BIER proto=3D1 indicating a BIER-specifi=
c unique VpnLabel ? or a Per-platform (RFC5331) downstream-assigned unique =
label ? &nbsp;if it is the later one, how about
 adding a new BIER proto value to indicating a BIER-specific unique VpnLabe=
l ? &nbsp;And then a static Context (BIER) can be optional to the dynamic a=
dvertising of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; In BIER header, proto=3D1 indicates downstream-assigned l=
abel. There is no need to define a new BIER specific proto value. The reaso=
n is that &#8220;downstream-assigned label&#8221; just
 means that it is a label in the &#8220;main/default&#8221; label space of =
the receiving router, and a DCB label is just that. Nothing is BIER specifi=
c here. I believe Tony also responded to you (and in BIER WG).<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-boun=
ces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<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">Hi WG,<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">We have received an early alloc=
ation request for the draft-ietf-bess-mvpn-evpn-aggregation-label.<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">Please raise your concerns if y=
ou object to this request and if you think that the document is not mature =
enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Feel also free to support this =
request.<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">We will wait until next Monday =
(12/17) to gather feedbacks.<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,<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" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">_____________________________________________________________=
____________________________________________________________<o:p></o:p></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Ce message et ses pieces jointes peuvent contenir des informa=
tions confidentielles ou privilegiees et ne doivent donc<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">pas etre diffuses, exploites ou copies sans autorisation. Si =
vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">a l'expediteur et le detruire ainsi que les pieces jointes. L=
es messages electroniques etant susceptibles d'alteration,<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Orange decline toute responsabilite si ce message a ete alter=
e, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">This message and its attachments may contain confidential or =
privileged information that may be protected by law;<o:p></o:p></span></pre=
>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">they should not be distributed, used or copied without author=
isation.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">If you have received this email in error, please notify the s=
ender and delete this message and its attachments.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">As emails may be altered, Orange is not liable for messages t=
hat have been modified, changed or falsified.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Thank you.<o:p></o:p></span></pre>
</div>
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From: Xiejingrong <xiejingrong@huawei.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi Stephane,

Thank you for raising the meaningful discussion on this draft.

I am not against the early allocation, because the allocation needed by the=
 DCB-context-label can help the aggregated  P2MP/MP2MP for MVPN/EVPN as an =
extension to the current RFC6513.

I am not convinced to follow the DCB-context-label for BIER/SegmentedMVPN c=
ases,  but this can be discussed later.

Thanks,
Jingrong.


From: stephane.litkowski@orange.com [mailto:stephane.litkowski@orange.com]
Sent: Thursday, December 13, 2018 4:40 PM
To: Xiejingrong <xiejingrong@huawei.com>; Jeffrey (Zhaohui) Zhang <zzhang@j=
uniper.net>; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jingrong,

Speaking as co-chair, what I need to know from this discussion is if there =
is a blocking point for the early allocation.
Yes, of course the draft will require some polishing, clarifications... as =
Jeffrey has mentioned, this is not a WGLC.

Based on your last sentence (and the overall discussion), I don't see any r=
eal blocking point but I want this to be crystal clear. So please state cle=
arly if you object to the early allocation or not and why. What is importan=
t to me is to ensure that the encoding is stable and does not require any c=
hange.


Thanks,

Stephane



From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Xiejingrong
Sent: Thursday, December 13, 2018 03:24
To: Jeffrey (Zhaohui) Zhang; LITKOWSKI Stephane OBS/OINIS; bess@ietf.org<ma=
ilto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net<mailto:zzhang@juniper.net=
>>; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.
But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?
For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.
DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).
Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.
Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.

Thank you.

___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.

Thank you.

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</head>
<body lang=3D"ZH-CN" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi Stephane,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Thank you for raising the meaningful discussion on this draft.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I am not against the early allocation, because the allocation nee=
ded by the DCB-context-label can help the aggregated &nbsp;P2MP/MP2MP for M=
VPN/EVPN as an extension to the current RFC6513.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I am not convinced to follow the DCB-context-label for BIER/Segme=
ntedMVPN cases, &nbsp;but this can be discussed later.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> stephane.litkowski@orange.com [mailto:stephane.litkowski@orange=
.com]
<br>
<b>Sent:</b> Thursday, December 13, 2018 4:40 PM<br>
<b>To:</b> Xiejingrong &lt;xiejingrong@huawei.com&gt;; Jeffrey (Zhaohui) Zh=
ang &lt;zzhang@juniper.net&gt;; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:#1F497D">Hi Jing=
rong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Speakin=
g as co-chair, what I need to know from this discussion is if there is a bl=
ocking point for the early allocation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Yes, of=
 course the draft will require some polishing, clarifications&#8230; as Jef=
frey has mentioned, this is not a WGLC.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Based o=
n your last sentence (and the overall discussion), I don&#8217;t see any re=
al blocking point but I want this to be crystal clear. So please state clea=
rly if you object to the early allocation or
 not and why. What is important to me is to ensure that the encoding is sta=
ble and does not require any change.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Stephan=
e<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,sans-serif">From:</span></b><span lang=3D"EN-U=
S" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"> BE=
SS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</=
a>]
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Thursday, December 13, 2018 03:24<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang; LITKOWSKI Stephane OBS/OINIS; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">s/inter-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Xiejingrong
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:9.0pt">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Let m=
e take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In sum=
mary, labels can be allocated and advertised the following<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from the DCB.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication that they are=
 from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from a few<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; common context label spaces,
</span><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;co=
lor:red">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</span><span lang=
=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp; =
PEs advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels along with the context-identifying labels.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbs=
p; A central authority assigns disjoint label blocks from those a //<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allocate labels =
from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbsp; Each PE a=
llocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels from its assigned label block independently for it=
s<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-identifying labe=
ls.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option=
 1 is simplest, but it requires that all the PEs set aside a<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common=
 label block for the DCB that is large enough for all the<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/B=
Ds/ESes combined.&nbsp; Option 3 is needed only for segmented<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; select=
ive tunnels that are set up dynamically.&nbsp; Multiple options<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could =
be used in any combination depending on the deployment<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situat=
ion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Optio=
n-1 is simplest and I like it very much (anyone who don&#8217;t like simpli=
fication?). For Inter-area EVPN deployment scenarios, it is strong and simp=
le enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">But w=
hen it is not the suitable case, and Option-2 has to be used, I think thing=
s are becoming complex: You still need a DCB from &#8216;main/default&#8217=
; label-space, though this DCB is very small, which
 maybe only include ONE label. And then the ONE label is used as &#8216;con=
text-label&#8217;. While for BIER case, BIER header itself can act as a &#8=
216;BIER-Context&#8217; naturally. Am I understanding correctly ?<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">For O=
ption-3, I do understand it as two sub-options, Option-3a if there is enoug=
h number of Labels in the DCB, and Option-3b if there isn&#8217;t and the O=
NE &#8216;DCB&#8217; label is used as context-label. Each
 one is difficult for me to consider the development and deployment. One th=
e other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechanism to=
 select the right upstream-assigned VpnLabel to download to forwarding stat=
es.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">So my=
 summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to VNI very much, but the MPLS labels in the &#8220;main/default&=
#8221; space is very costly due to the &#8216;per-platform&#8217; (RFC5331)=
 allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to SRGB very much, but DCB requires &#8216;absolute&#8217; unique=
 value other than the &#8216;unique&#8217; index in SRGB(at least has such =
mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f context-label from a DCB can be comparable to the use of the &#8216;BIER-=
specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f &#8216;dynamic&#8217; allocation with DCB mechanism in segmented MVPN dep=
loyment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">I sug=
gest this draft to make more clear what the use cases are, what it really w=
ant to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Thank=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">=
mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please note that this is not a LC for the draft. This is the poll for earl=
y allocation for the DCB-flag and an extended community type.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I remember I have raised my concerns, but I didn&#8217;t find the=
 response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; Sorry for missing those. Please see below.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Copy the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">1.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif;color:#1F497D">&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">The pr=
oblem stated by this draft is valid, and the proposed method is useful for =
some of the listed problem. For example, EVPN BUM who uses MPLS identificat=
ion and dataplane.
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D">Zzh&=
gt; Do you think the proposed solution is reasonable for the problems? If s=
o, we would like to see early allocation is
 done. The allocation is temporary &#8211; it would time out after some tim=
e if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">2.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif;color:#1F497D">&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">EVPN B=
UM using vxlan/vni identification may not need a MPLS label to identify the=
 vpn/tenant.</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 The draft is about &#8220;aggregation label&#8221;, so vxlan/vni is irrele=
vant. On the other hand, in case of vxlan/vni, the VNI is no different from=
 a DCB label in concept (so the solution of using DCB
 label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">3.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif;color:#1F497D">&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">For MV=
PN who has a UMH(Upstream Multicast Hop) selection procedure, the exist usi=
ng of upstream-assigned VpnLabel can be optimized to only populate to forwa=
rding-state when there are c-multicast
 flows selecting the specific UMH PE.</span><span lang=3D"EN-US" style=3D"f=
ont-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 If that is a better solution, perhaps a separate draft can be written. The=
 solution in this draft is simpler and in concept no different from vxlan c=
ase.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">4.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif;color:#1F497D">&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">For an=
 End-to-End deployment of MVPN who spans multi-ASes as the way stated in &l=
t;draft-geng-bier-sr-multicast-deployment&gt;, the allocation of a global-u=
nique label is useful and possible. But operators
 may need to be very careful to allocate the very limited MPLS labels. Beca=
use, MPLS labels has been divided to SRLB and SRGB, and SRGB may have been =
again divided by SR-domains according to &lt;draft-filsfils-spring-large-sc=
ale-interconnect-12&gt;. &nbsp;</span><span lang=3D"EN-US" style=3D"font-si=
ze:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 What&#8217;s relevant here is the second part of your text above (the &#82=
20;But operators &#8230;&#8221;) &#8211; though that is the same point #5 b=
elow (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">5.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif;color:#1F497D">&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">For se=
gmented MVPN deployment, the further divide of the MPLS Label is also diffi=
cult when thinking of the above.</span><span lang=3D"EN-US" style=3D"font-s=
ize:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">6.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif;color:#1F497D">&nbsp;&nbsp;
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D">For BI=
ER, is the BIER proto=3D1 indicating a BIER-specific unique VpnLabel ? or a=
 Per-platform (RFC5331) downstream-assigned unique label ? &nbsp;if it is t=
he later one, how about adding a new BIER proto
 value to indicating a BIER-specific unique VpnLabel ? &nbsp;And then a sta=
tic Context (BIER) can be optional to the dynamic advertising of a Context =
?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; In BIER header, proto=3D1 indicates downstream-assigned l=
abel. There is no need to define a new BIER specific proto value. The reaso=
n is that &#8220;downstream-assigned label&#8221; just
 means that it is a label in the &#8220;main/default&#8221; label space of =
the receiving router, and a DCB label is just that. Nothing is BIER specifi=
c here. I believe Tony also responded to you (and in BIER WG).<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-boun=
ces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<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">Hi WG,<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">We have received an early alloc=
ation request for the draft-ietf-bess-mvpn-evpn-aggregation-label.<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">Please raise your concerns if y=
ou object to this request and if you think that the document is not mature =
enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Feel also free to support this =
request.<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">We will wait until next Monday =
(12/17) to gather feedbacks.<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,<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" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">_____________________________________________________________=
____________________________________________________________<o:p></o:p></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Ce message et ses pieces jointes peuvent contenir des informa=
tions confidentielles ou privilegiees et ne doivent donc<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">pas etre diffuses, exploites ou copies sans autorisation. Si =
vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">a l'expediteur et le detruire ainsi que les pieces jointes. L=
es messages electroniques etant susceptibles d'alteration,<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Orange decline toute responsabilite si ce message a ete alter=
e, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">This message and its attachments may contain confidential or =
privileged information that may be protected by law;<o:p></o:p></span></pre=
>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">they should not be distributed, used or copied without author=
isation.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">If you have received this email in error, please notify the s=
ender and delete this message and its attachments.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">As emails may be altered, Orange is not liable for messages t=
hat have been modified, changed or falsified.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Thank you.<o:p></o:p></span></pre>
</div>
<pre><span lang=3D"EN-US">_________________________________________________=
________________________________________________________________________<o:=
p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">Ce message et ses pieces jointes peuvent contenir=
 des informations confidentielles ou privilegiees et ne doivent donc<o:p></=
o:p></span></pre>
<pre><span lang=3D"EN-US">pas etre diffuses, exploites ou copies sans autor=
isation. Si vous avez recu ce message par erreur, veuillez le signaler<o:p>=
</o:p></span></pre>
<pre><span lang=3D"EN-US">a l'expediteur et le detruire ainsi que les piece=
s jointes. Les messages electroniques etant susceptibles d'alteration,<o:p>=
</o:p></span></pre>
<pre><span lang=3D"EN-US">Orange decline toute responsabilite si ce message=
 a ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">This message and its attachments may contain conf=
idential or privileged information that may be protected by law;<o:p></o:p>=
</span></pre>
<pre><span lang=3D"EN-US">they should not be distributed, used or copied wi=
thout authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">If you have received this email in error, please =
notify the sender and delete this message and its attachments.<o:p></o:p></=
span></pre>
<pre><span lang=3D"EN-US">As emails may be altered, Orange is not liable fo=
r messages that have been modified, changed or falsified.<o:p></o:p></span>=
</pre>
<pre><span lang=3D"EN-US">Thank you.<o:p></o:p></span></pre>
</div>
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "Satya Mohanty     (satyamoh)" <satyamoh@cisco.com>, Adrian Farrel <adrian@olddog.co.uk>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-df-election-framework.all@ietf.org" <draft-ietf-bess-evpn-df-election-framework.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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Date: Fri, 14 Dec 2018 10:40:43 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/JOL1flmjVJbMqUmpSmOagNp5Bzk>
Subject: Re: [bess] Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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From nobody Fri Dec 14 07:10:33 2018
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: Xiejingrong <xiejingrong@huawei.com>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Date: Fri, 14 Dec 2018 15:10:08 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/68lTgd1ZDURBvBJD2hShCzV7YwI>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Please see zzh3> below.

From: Xiejingrong <xiejingrong@huawei.com>
Sent: Friday, December 14, 2018 2:10 AM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net>; stephane.litkowski@orange=
.com; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Please see xjr3>> below.

From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Thursday, December 13, 2018 10:32 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jingrong,

Please see zzh2> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Wednesday, December 12, 2018 9:24 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess=
@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net<mailto:zzhang@juniper.net=
>>; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.

Zzh2> So I assume you're not objecting to the early allocation for DCB-flag=
 at least?
XJR3>> I don't understand how a DCB-flag in PTA is necessary in opinion-1. =
 Does it used to do consistency check ?

Zzh3> If you don't carry that flag, how do you know if the label is upstrea=
m assigned or from the DCB?

But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?

Zzh2> Nowadays with the adoption of SR, allocating SAME SRGBs across router=
s is not difficult and is the preferred way. If you use DCB (could just be =
the SRGB itself) for non-segmented case, what's the concern with allocating=
 a context label from the DCB/SRGB? See later comment about BIER-context.
XJR3>> OK for non-segmented case (mainly intra-area, at least intra-AS case=
).

For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

Zzh2> There is no 3a. There could be multiple DCB labels for multiple conte=
xt label spaces, either because of scaling requirement (in theory) or for w=
hatever reason an operator wants to use multiple.
Zzh2> I don't think selectively installing upstream assigned labels based o=
n UMH is good enough (and it introduces more complexity). The sources could=
 be everywhere, and in case of EVPN, the forwarding could be (*,g) based, s=
o you'll end up with the original problem.
XJR3>> OK. Thanks for the clarification.
XJR3>> For segmented case stated in this opinion, the section 2.2.2.1 state=
d that, it does not address the original scaling issue.

Zzh3> Let's walk through these steps:
Zzh3> 1) Even in the non-segmented case, you're concerned that it may not b=
e easy to allocate a common DCB across all routers. If that's a real concer=
n, you can have a separate context label space (or even a few of them) shar=
ed by all PEs (instead of one context label space for every ingress PE). Th=
ose context label spaces can be identified by the context labels allocated =
from a smaller DCB. That's the rational for the "Context Label Space ID" Ex=
tended Community. While using a few context label spaces still requires a r=
outer to implement infrastructure for context label spaces, it is better to=
 only need to support a few context label spaces than having to scale to th=
ousands of context label spaces.
Zzh3> 2) In segmented case, while you still need one label for each S-PMSI,=
 using a few context label spaces is better than having to scale to thousan=
ds of context label spaces - see 1) above.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.

Zzh2> If one can do common SRGB for SR, then one can do DCB for MVPN/EVPN. =
If you're still concerned with that, you can have a separate context label =
space for EVPN/MVPN purpose, with the context label from the DCB/SRGB. I do=
n't want to tie it to BIER only though, because the problem and solution eq=
ually applies to P2MP tunnels.
XJR3>> Yes, good enough to use in intra-AS/intra-area cases for DCB/SRGB. F=
or Inter-area/inter-AS case, I hope it can to help non-segmented MVPN deplo=
yment but I am worrying about that.

Zzh3> It's not intra-AS/area vs. inter-AS/area. It's non-segmented vs. segm=
ented. When there is no segmentation, you don't need to allocate different =
labels for each S-PMSI so DCB may be large enough. When there is segmentati=
on you have to allocate different labels for different S-PMSI, so if DCB is=
 not big enough, you can use context label spaces identified by DCB labels.
Zzh3> I would not worry about allocating DCB across AS boundary in case of =
non-segmentation - if you do not need to segmentation across AS boundary, m=
ost likely the ASes belong to the same operator or the operators are friend=
ly enough to work out a DCB.

DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).

Zzh2> Practically, operators strongly desire to use common SRGBs. Vendors h=
ad resisted the push for using common SRGBs but now have given up.
XJR3>> I guess the acceptance of SRGB may not occur if the "safety belt" is=
 not invented. Anyway, I feel worried that, even a small DCB block can be d=
ifficult in case out of intra-AS/intra-area scope.

Zzh3> Common SRGB is a fact nowadays.
Zzh3> What better "safety belt" do you need/envision than using a few conte=
xt label spaces? If you worry about the practicality of a small DCB block a=
cross many PEs, do you not worry about PEs scaling up to thousands of conte=
xt label spaces (that are needed for upstream assigned labels)?

Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.

Zzh2> There is no need, and it is not desired to have a BIER-specific conte=
xt. Besides, defining a new BIER header's "proto" value to indicate a subse=
quent context label space should first be discussed in BIER WG; if that pas=
ses, then we come back to (or at least involve) BESS WG to enhance MVPN/EVP=
N signaling so that every PE knows where to allocate labels and where to in=
stall forwarding state.
XJR3>> OK.  BIER has the proto field for easily extending, we can move this=
 discussion to BIER or personally.

Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

Zzh2> Compared to existing method of using upstream assigned labels, what i=
s the complexity? Upstream assigned labels are assigned from the assigner's=
 main/default label space; the "dynamic" allocation scheme in option-3 allo=
cates from a label block (of a context label space identified by a DCB labe=
l) assigned to the assigner. If the need to maintain that extra label block=
 information is complicated, wouldn't it be more complicated to selectively=
 install upstream-assigned labels based on UMH selection (forget about that=
 it would not work all the time)?
XJR3>> For non-segmented aggregrated-P2MP or MP2MP deployment, I was convin=
ced to believe it is useful even introducing the extra protocol extension (=
see IANA part of the draft).
XJR3>> If I understand correctly, the data-plane also have some change too.=
 A VPN need to be identified by a DCB-context-label (to identify the follow=
ing label is not from a main/default space), and a following COMMON vpn lab=
el. It is not common in current MPLS world and may need some change in data=
-plane.

Zzh3> There is nothing special here. In the upstream assigned case, the bas=
e tunnel label (from the data-receiving router's main/default label space) =
tells you which context label space to look up the next label (that identif=
ies the VPN/BD/ES in our case). Here, the DCB context label (also from the =
data-receiving router's main/default label space) tells you which context l=
abel space to use for the next label lookup.

Zzh> If that is not convincing enough, what is a better solution? I know yo=
u have proposed doing IP lookup - we discussed in a separate thread on the =
pros/cons of that and we're working together on a separate draft on that, r=
ight? I also have a short section 2.2.2.3 on that.
XJR3>> I am not convinced to follow the DCB-context-label for BIER or for S=
egmented MVPN case.
Zzh3> I hope the responses above help.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Zzh2> The use cases and problem domains are discussed in section 2.1, and m=
ore complicated scenarios are followed-up in section 2.2.
Zzh2> About "what it don't" - can you point out the areas that you think th=
is draft should cover or explicitly declare out of scope?

XJR3>> the section 2.2.2.1 stated that, "it does not address the original s=
caling issue". I just feel that, the draft can remove the segmented case ou=
t of the DCB-context-label solution if it does not match well (though it ma=
y work).

Zzh3> We have to discuss the issue with the segmentation (otherwise one may=
 ask "what about segmentation") and we give the best solution so far. I can=
 add "better/other solutions are beyond the scope of this document" if you =
want J

XJR3>> So does the case of MVPN/EVPN using BIER.

Zzh3> The spec starts discussing the issue using the BIER example; it also =
points out the issue is not unique with BIER (though it's most acute with B=
IER). The solution works for BIER as well as P2MP tunnel aggregation (I als=
o have alluded to the applicability for IR though the text has not been pub=
lished). In particular, the specification/procedures part has nothing BIER =
specific. What's wrong with that?
Zzh3> Thanks.
Zzh3> Jeffrey

XJR3>> Thanks.
XJR3>> Jingrong

Zzh2> Thanks.
Zzh2> Jeffrey


Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



___________________________________________________________________________=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Theme"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
xt"/>
<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
 Spacing"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/=
>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/=
>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/=
>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
uote"/>
<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
ntense Quote"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 4=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 5=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 6=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"19" QFormat=3D"true" Name=3D"S=
ubtle Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"21" QFormat=3D"true" Name=3D"I=
ntense Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"31" QFormat=3D"true" Name=3D"S=
ubtle Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"32" QFormat=3D"true" Name=3D"I=
ntense Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"33" QFormat=3D"true" Name=3D"B=
ook Title"/>
<w:LsdException Locked=3D"false" Priority=3D"37" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" Name=3D"Bibliography"/>
<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" QFormat=3D"true" Name=3D"TOC Heading"/>
<w:LsdException Locked=3D"false" Priority=3D"41" Name=3D"Plain Table 1"/>
<w:LsdException Locked=3D"false" Priority=3D"42" Name=3D"Plain Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"43" Name=3D"Plain Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"44" Name=3D"Plain Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"45" Name=3D"Plain Table 5"/>
<w:LsdException Locked=3D"false" Priority=3D"40" Name=3D"Grid Table Light"/=
>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 6"/>
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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"tab-interval:.=
5in">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Please see zzh3&gt; =
below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<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"mso-fareast-font-family:&quot;Time=
s New Roman&quot;">From:</span></b><span style=3D"mso-fareast-font-family:&=
quot;Times New Roman&quot;"> Xiejingrong &lt;xiejingrong@huawei.com&gt;
<br>
<b>Sent:</b> Friday, December 14, 2018 2:10 AM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;zzhang@juniper.net&gt;; stephane.lit=
kowski@orange.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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;color:#1F497D">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Pleas=
e see </span>
<span style=3D"font-size:10.5pt;color:blue">xjr3&gt;&gt;</span><span style=
=3D"font-size:10.5pt;color:#1F497D"> below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> Jeffrey (=
Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">mailto:zzhang@juniper=
.net</a>]
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:32 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Hi Ji=
ngrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Pleas=
e see zzh2&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-outline-level:1"><b>From:</b> BESS &lt;=
<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Wednesday, December 12, 2018 9:24 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">s/int=
er-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> Xiejingro=
ng <br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Hi Jeffrey,<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Let me take the sect=
ion 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In summary, labels ca=
n be allocated and advertised the following<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbsp; A central au=
thority allocates per-VPN/BD/ES labels from the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; PEs advertise the labels with an indication that they are from<o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbsp; A central au=
thority allocates per-VPN/BD/ES labels from a few<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; common context label spaces,
</span><span style=3D"font-family:&quot;Courier New&quot;;color:red">and al=
locate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;identify those context label spaces.</span><span style=3D"font-famil=
y:&quot;Courier New&quot;;color:navy">&nbsp; PEs advertise the VPN/BD<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; labels along with the context-identifying labels.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbsp; A central au=
thority assigns disjoint label blocks from those a //<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; few context label spaces to each PE, and allocate labels from the<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; DCB to identify the context label spaces.&nbsp; Each PE allocates<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; labels from its assigned label block independently for its<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; segmented S-PMSI, along with the context-identifying labels.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option 1 is simplest,=
 but it requires that all the PEs set aside a<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common label block fo=
r the DCB that is large enough for all the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/BDs/ESes combine=
d.&nbsp; Option 3 is needed only for segmented<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; selective tunnels tha=
t are set up dynamically.&nbsp; Multiple options<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could be used in any =
combination depending on the deployment<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situation.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Option-1 is simplest=
 and I like it very much (anyone who don&#8217;t like simplification?). For=
 Inter-area EVPN deployment scenarios, it is strong and simple enough I thi=
nk.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; So I assume you&#8217;re not objecting to the early allocation for DCB-=
flag at least?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:blue">XJR3&gt;=
&gt; I don&#8217;t understand how a DCB-flag in PTA is necessary in opinion=
-1. &nbsp;Does it used to do consistency check ?</span><span style=3D"font-=
size:12.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; If you don&=
#8217;t carry that flag, how do you know if the label is
 upstream assigned or from the DCB?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">But when it is not t=
he suitable case, and Option-2 has to be used, I think things are becoming =
complex: You still need a DCB from &#8216;main/default&#8217; label-space, =
though this DCB is very small, which maybe only
 include ONE label. And then the ONE label is used as &#8216;context-label&=
#8217;. While for BIER case, BIER header itself can act as a &#8216;BIER-Co=
ntext&#8217; naturally. Am I understanding correctly ?<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; Nowadays with the adoption of SR, allocating SAME SRGBs across routers =
is not difficult and is the preferred way. If you use DCB (could just be th=
e SRGB itself) for non-segmented case,
 what&#8217;s the concern with allocating a context label from the DCB/SRGB=
? See later comment about BIER-context.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; OK for non-segmented case (mainly intra-area, at least intra-AS case).=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">For Option-3, I do u=
nderstand it as two sub-options, Option-3a if there is enough number of Lab=
els in the DCB, and Option-3b if there isn&#8217;t and the ONE &#8216;DCB&#=
8217; label is used as context-label. Each one is difficult
 for me to consider the development and deployment. One the other hand, the=
 segmented MVPN can use the &#8216;UMH&#8217; mechanism to select the right=
 upstream-assigned VpnLabel to download to forwarding states.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; There is no 3a. There could be multiple DCB labels for multiple context=
 label spaces, either because of scaling requirement (in theory) or for wha=
tever reason an operator wants to use multiple.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; I don&#8217;t think selectively installing upstream assigned labels bas=
ed on UMH is good enough (and it introduces more complexity). The sources c=
ould be everywhere, and in case of EVPN, the
 forwarding could be (*,g) based, so you&#8217;ll end up with the original =
problem.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; OK. Thanks for the clarification.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; For segmented case stated in this opinion, the section 2.2.2.1 stated =
that, it does not address the original scaling issue.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; Let&#8217;s=
 walk through these steps:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; 1) Even in =
the non-segmented case, you&#8217;re concerned that it
 may not be easy to allocate a common DCB across all routers. If that&#8217=
;s a real concern, you can have a separate context label space (or even a f=
ew of them) shared by all PEs (instead of one context label space for every=
 ingress PE). Those context label spaces
 can be identified by the context labels allocated from a smaller DCB. That=
&#8217;s the rational for the &#8220;Context Label Space ID&#8221; Extended=
 Community. While using a few context label spaces still requires a router =
to implement infrastructure for context label spaces,
 it is better to only need to support a few context label spaces than havin=
g to scale to thousands of context label spaces.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; 2) In segme=
nted case, while you still need one label for each
 S-PMSI, using a few context label spaces is better than having to scale to=
 thousands of context label spaces &#8211; see 1) above.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">So my summarized com=
ments: <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">DCB is similar to VN=
I very much, but the MPLS labels in the &#8220;main/default&#8221; space is=
 very costly due to the &#8216;per-platform&#8217; (RFC5331) allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; If one can do common SRGB for SR, then one can do DCB for MVPN/EVPN. If=
 you&#8217;re still concerned with that, you can have a separate context la=
bel space for EVPN/MVPN purpose, with the context
 label from the DCB/SRGB. I don&#8217;t want to tie it to BIER only though,=
 because the problem and solution equally applies to P2MP tunnels.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:blue">XJR3&gt;=
&gt; Yes, good enough to use in intra-AS/intra-area cases for DCB/SRGB. For=
 Inter-area/inter-AS case, I hope it can to help non-segmented MVPN deploym=
ent but I am worrying about that.</span><span style=3D"font-size:12.0pt;col=
or:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; It&#8217;s =
not intra-AS/area vs. inter-AS/area. It&#8217;s non-segmented
 vs. segmented. When there is no segmentation, you don&#8217;t need to allo=
cate different labels for each S-PMSI so DCB may be large enough. When ther=
e is segmentation you have to allocate different labels for different S-PMS=
I, so if DCB is not big enough, you can
 use context label spaces identified by DCB labels.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; I would not=
 worry about allocating DCB across AS boundary in
 case of non-segmentation &#8211; if you do not need to segmentation across=
 AS boundary, most likely the
<span class=3D"SpellE">ASes</span> belong to the same operator or the opera=
tors are friendly enough to work out a DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">DCB is similar to SR=
GB very much, but DCB requires &#8216;absolute&#8217; unique value other th=
an the &#8216;unique&#8217; index in SRGB(at least has such mechanism).<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; Practically, operators strongly desire to use common SRGBs. Vendors had=
 resisted the push for using common SRGBs but now have given up.<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; I guess the acceptance of SRGB may not occur if the &#8220;safety belt=
&#8221; is not invented. Anyway, I feel worried that, even a small DCB bloc=
k can be difficult in case out of intra-AS/intra-area
 scope.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; Common SRGB=
 is a fact nowadays.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; What better=
 &#8220;safety belt&#8221; do you need/envision than using a
 few context label spaces? If you worry about the practicality of a small D=
CB block across many PEs, do you not worry about PEs scaling up to thousand=
s of context label spaces (that are needed for upstream assigned labels)?<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Use of context-label=
 from a DCB can be comparable to the use of the &#8216;BIER-specific&#8217;=
 context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; There is no need, and it is not desired to have a BIER-specific context=
. Besides, defining a new BIER header&#8217;s &#8220;proto&#8221; value to =
indicate a subsequent context label space should first be
 discussed in BIER WG; if that passes, then we come back to (or at least in=
volve) BESS WG to enhance MVPN/EVPN signaling so that every PE knows where =
to allocate labels and where to install forwarding state.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:blue">XJR3&gt;=
&gt; OK. &nbsp;BIER has the proto field for easily extending, we can move t=
his discussion to BIER or personally.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Use of &#8216;dynami=
c&#8217; allocation with DCB mechanism in segmented MVPN deployment may add=
 extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; Compared to existing method of using upstream assigned labels, what is =
the complexity? Upstream assigned labels are assigned from the assigner&#82=
17;s main/default label space; the &#8220;dynamic&#8221;
 allocation scheme in option-3 allocates from a label block (of a context l=
abel space identified by a DCB label) assigned to the assigner. If the need=
 to maintain that extra label block information is complicated, wouldn&#821=
7;t it be more complicated to selectively
 install upstream-assigned labels based on UMH selection (forget about that=
 it would not work all the time)?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:blue">XJR3&gt;=
&gt; For non-segmented aggregrated-P2MP or MP2MP deployment, I was convince=
d to believe it is useful even introducing the extra protocol extension (se=
e IANA part of the draft).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:blue">XJR3&gt;=
&gt; If I understand correctly, the data-plane also have some change too. A=
 VPN need to be identified by a DCB-context-label (to identify the followin=
g label is not from a main/default space),
 and a following COMMON vpn label. It is not common in current MPLS world a=
nd may need some change in data-plane.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; There is no=
thing special here. In the upstream assigned case,
 the base tunnel label (from the data-receiving router&#8217;s main/default=
 label space) tells you which context label space to look up the next label=
 (that identifies the VPN/BD/ES in
<span class=3D"SpellE">our</span> case). Here, the DCB context label (also =
from the data-receiving router&#8217;s main/default label space) tells you =
which context label space to use for the next label lookup.<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh&g=
t; If that is not convincing enough, what is a better solution? I know you =
have proposed doing IP lookup &#8211; we discussed in a separate thread on =
the pros/cons of that and we&#8217;re working together
 on a separate draft on that, right? I also have a short section 2.2.2.3 on=
 that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; </span><span style=3D"font-size:12.0pt;color:blue">I am not convinced =
to follow the DCB-context-label for BIER or for Segmented MVPN case.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; I hope the =
responses above help.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">I suggest this draft=
 to make more clear what the use cases are, what it really want to solve, a=
nd what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; The use cases and problem domains are discussed in section 2.1, and mor=
e complicated scenarios are followed-up in section 2.2.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; About &#8220;what it don&#8217;t&#8221; &#8211; can you point out the a=
reas that you think this draft should cover or explicitly declare out of sc=
ope?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; the section 2.2.2.1 stated that, &#8220;it does not address the origin=
al scaling issue&#8221;. I just feel that, the draft can remove the segment=
ed case out of the DCB-context-label solution if it does
 not match well (though it may work).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; We have to =
discuss the issue with the segmentation (otherwise
 one may ask &#8220;what about segmentation&#8221;) and we give the best so=
lution so far. I can add &#8220;better/other solutions are beyond the scope=
 of this document&#8221; if you want
</span><span style=3D"font-size:12.0pt;mso-bidi-font-size:11.0pt;font-famil=
y:Wingdings;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso=
-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-char-type:s=
ymbol;mso-symbol-font-family:Wingdings"><span style=3D"mso-char-type:symbol=
;mso-symbol-font-family:Wingdings">J</span></span><span style=3D"font-size:=
12.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family:Calibri;mso-hansi-fo=
nt-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1=
F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; So does the case of MVPN/EVPN using BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; The spec st=
arts discussing the issue using the BIER example;
 it also points out the issue is not unique with BIER (though it&#8217;s mo=
st acute with BIER). The solution works for BIER as well as P2MP tunnel agg=
regation (I also have alluded to the applicability for IR though the text h=
as not been published). In particular,
 the specification/procedures part has nothing BIER specific. What&#8217;s =
wrong with that?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; Thanks.<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Zzh3&gt; Jeffrey<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; Thanks. <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:blue">XJR3&gt;=
&gt; Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh2&=
gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Thanks.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt">Jingrong<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> Jeffrey (=
Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">mailto:zzhang@juniper=
.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Jingr=
ong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Pleas=
e see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-outline-level:1"><b>From:</b> BESS &lt;=
<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Objec=
tion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; Please note th=
at this is not a LC for the draft. This is the poll for early allocation fo=
r the DCB-flag and an extended community type.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">I rem=
ember I have raised my concerns, but I didn&#8217;t find the response.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh&g=
t; Sorry for missing those. Please see below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Copy =
the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">The problem stated by this draft is valid, and the proposed method is us=
eful for some of the listed problem. For example, EVPN BUM who uses MPLS id=
entification and dataplane.
</span><span style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:12.0pt;color:#1F497D">Zzh&gt; Do you thin=
k the proposed solution is reasonable for the problems? If so, we would lik=
e to see early allocation is done. The allocation
 is temporary &#8211; it would time out after some time if the draft does n=
ot become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">EVPN BUM using vxlan/vni identification may not need a MPLS label to ide=
ntify the vpn/tenant.</span><span style=3D"font-size:10.5pt"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; The draft is a=
bout &#8220;aggregation label&#8221;, so vxlan/vni is irrelevant. On the ot=
her hand, in case of vxlan/vni, the VNI is no different from a DCB label in=
 concept (so the solution of using DCB label should
 be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, the =
exist using of upstream-assigned VpnLabel can be optimized to only populate=
 to forwarding-state when there are
 c-multicast flows selecting the specific UMH PE.</span><span style=3D"font=
-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; If that is a b=
etter solution, perhaps a separate draft can be written. The solution in th=
is draft is simpler and in concept no different from vxlan case.<o:p></o:p>=
</span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For an End-to-End deployment of MVPN who spans multi-ASes as the way sta=
ted in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the allocation of a=
 global-unique label is useful and possible.
 But operators may need to be very careful to allocate the very limited MPL=
S labels. Because, MPLS labels has been divided to SRLB and SRGB, and SRGB =
may have been again divided by SR-domains according to &lt;draft-filsfils-s=
pring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; What&#8217;s r=
elevant here is the second part of your text above (the &#8220;But operator=
s &#8230;&#8221;) &#8211; though that is the same point #5 below (please se=
e my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For segmented MVPN deployment, the further divide of the MPLS Label is a=
lso difficult when thinking of the above.</span><span style=3D"font-size:10=
.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Zzh&gt; Please see sec=
tion 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style=3D"font-size:10.5pt;mso-bidi-font-family:S=
imSun;color:#1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.5pt;color:#1F497=
D">For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnLab=
el ? or a Per-platform (RFC5331) downstream-assigned unique label ? &nbsp;i=
f it is the later one, how about adding a
 new BIER proto value to indicating a BIER-specific unique VpnLabel ? &nbsp=
;And then a static Context (BIER) can be optional to the dynamic advertisin=
g of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Zzh&g=
t; In BIER header, proto=3D1 indicates downstream-assigned label. There is =
no need to define a new BIER specific proto value. The reason is that &#822=
0;downstream-assigned label&#8221; just means that it
 is a label in the &#8220;main/default&#8221; label space of the receiving =
router, and a DCB label is just that. Nothing is BIER specific here. I beli=
eve Tony also responded to you (and in BIER WG).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Zzh&g=
t; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Zzh&g=
t; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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" style=3D"mso-outline-level:1"><b>From:</b> BESS [<a =
href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have received an early allocation request for the=
 draft-ietf-bess-mvpn-evpn-aggregation-label.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please raise your concerns if you object to this req=
uest and if you think that the document is not mature enough.<o:p></o:p></p=
>
<p class=3D"MsoNormal">Feel also free to support this request.<o:p></o:p></=
p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We will wait until next Monday (12/17) to gather fee=
dbacks.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">_____=
___________________________________________________________________________=
_________________________________________<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>=
&nbsp;</o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">Ce me=
ssage et ses pieces jointes peuvent contenir des informations confidentiell=
es ou privilegiees et ne doivent donc<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">pas e=
tre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce m=
essage par erreur, veuillez le signaler<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">a l'e=
xpediteur et le detruire ainsi que les pieces jointes. Les messages electro=
niques etant susceptibles d'alteration,<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">Orang=
e decline toute responsabilite si ce message a ete altere, deforme ou falsi=
fie. Merci.<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>=
&nbsp;</o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">This =
message and its attachments may contain confidential or privileged informat=
ion that may be protected by law;<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">they =
should not be distributed, used or copied without authorisation.<o:p></o:p>=
</span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">If yo=
u have received this email in error, please notify the sender and delete th=
is message and its attachments.<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">As em=
ails may be altered, Orange is not liable for messages that have been modif=
ied, changed or falsified.<o:p></o:p></span></pre>
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">Thank=
 you.<o:p></o:p></span></pre>
</div>
</div>
</div>
</div>
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--_000_DM6PR05MB50367131CB658801EB7441E5D4A10DM6PR05MB5036namp_--


From nobody Fri Dec 14 08:13:09 2018
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Subject: [bess] Genart last call review of draft-ietf-bess-evpn-df-election-framework-06
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Reviewer: Francesca Palombini
Review result: Ready with Nits

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

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-bess-evpn-df-election-framework-06
Reviewer: Francesca Palombini
Review Date: 2018-12-14
IETF LC End Date: 2018-12-18
IESG Telechat date: Not scheduled for a telechat

Summary: This draft is basically ready for publication, but has nits that
should be fixed before publication.

Major issues: N/A

Minor issues:

I agree with the reviewers comments saying that this document should update
RFC7432 and RFC8124. In particular, quoting RFC2232
(https://tools.ietf.org/html/rfc2223#section-12):

   [...] A document that
   merely updates an earlier document cannot stand on its own; it is
   something that must be added to or inserted into the previously
   existing document, and has limited usefulness independently.  The
   terms Supercedes and Replaces are no longer used.

   Updates

      To be used as a reference from a new item that cannot be used
      alone (i.e., one that supplements a previous document), to refer
      to the previous document.  The newer publication is a part that
      will supplement or be added on to the existing document; e.g., an
      addendum, or separate, extra information that is to be added to
      the original document.

(Yes, RFC2232 is obsolete, but I could not find the same text in the more
recent RFC7322)

Nits/editorial comments:

  "but they do not require
   any changes to the EVPN Route exchange and have minimal changes to
   their content per se."

* what does their refer to?

* Section 2.2.2: expand MAC-VRF on first usage for readability (or add a
reference to its definition)

* Figure 3: add a definition for ANY STATE (the figure is clear, but for
consistency I would add that in the text as well)

* Figure 3: add "or" between VLAN_CHANGE, RCVD_ES, LOST_ES (again, not
necessary, suggested for readability of the figure)

* Section 3.1: the term "re-entering" needs clarifying: I would consider a loop
as re-entering the state, but from bullet 8. it seems like you don't.

* suggestion for figure 4 (otherwise it looks like there are 2 fields Bitmap of
1B each):

      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
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | Type=0x06     | Sub-Type(0x06)| RSV |  DF Alg |    Bitmap     ~
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     ~               |            Reserved                           |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

* Section 3.2: why was Bit 0 left unassigned in Bitmap?

* IANA considerations: I think you want to specify that the policy for Alg 31
is Experimental use (right now the text describing the policy only says "RFC
required", with no distinction for different values).



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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Satya Mohanty \(satyamoh\)'" <satyamoh@cisco.com>, "'Rabadan, Jorge \(Nokia - US/Mountain View\)'" <jorge.rabadan@nokia.com>, <rtg-dir@ietf.org>, <draft-ietf-bess-evpn-df-election-framework.all@ietf.org>, <ietf@ietf.org>, <bess@ietf.org>
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Date: Sat, 15 Dec 2018 09:11:56 -0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/9NQaHRyRXbHr2OXbcjKIIFd6nyY>
Subject: Re: [bess] Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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We're good. Thanks!

Consult with your AD, but for the "updates" question, a way forward =
would be to make an explicit statement (in the Introduction) to the =
contrary.

Best,
Adrian
--
Fairy tales from North Wales brought to you for Christmas
https://www.feedaread.com/profiles/8604/
Available from your favourite online bookseller.
Or contact me to receive a signed copy by mail.

-----Original Message-----
From: Satya Mohanty (satyamoh) <satyamoh@cisco.com>=20
Sent: 14 December 2018 23:17
To: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>; =
Adrian Farrel <adrian@olddog.co.uk>; rtg-dir@ietf.org; =
draft-ietf-bess-evpn-df-election-framework.all@ietf.org; ietf@ietf.org; =
bess@ietf.org
Subject: Re: Rtgdir last call review of =
draft-ietf-bess-evpn-df-election-framework-06

Hi Jorge and Adrian.=20

Inline [Satya].

Thanks,
--Satya

=EF=BB=BFOn 12/14/18, 2:40 AM, "Rabadan, Jorge (Nokia - US/Mountain =
View)" <jorge.rabadan@nokia.com> wrote:

    Hi Adrian,
   =20
    Thank you very much for your thorough review.
    I incorporated most of your comments, please see the details in-line =
with [JORGE].
   =20
    There is one outstanding comment that Satya and I will discuss.
   =20
    Thank you.
    Jorge
   =20
    -----Original Message-----
    From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
    Date: Friday, December 7, 2018 at 9:11 PM
    To: Adrian Farrel <adrian@olddog.co.uk>, "rtg-dir@ietf.org" =
<rtg-dir@ietf.org>
    Cc: "draft-ietf-bess-evpn-df-election-framework.all@ietf.org" =
<draft-ietf-bess-evpn-df-election-framework.all@ietf.org>, =
"ietf@ietf.org" <ietf@ietf.org>, "bess@ietf.org" <bess@ietf.org>
    Subject: Re: Rtgdir last call review of =
draft-ietf-bess-evpn-df-election-framework-06
    Resent-From: <alias-bounces@ietf.org>
    Resent-To: <jorge.rabadan@nokia.com>, <satyamoh@cisco.com>, =
<sajassi@cisco.com>, <jdrake@juniper.net>, <kiran.nagaraj@nokia.com>, =
<senthil.sathappan@nokia.com>, <matthew.bocci@nokia.com>, =
<stephane.litkowski@orange.com>, <mankamis@cisco.com>, =
<martin.vigoureux@nokia.com>, <db3546@att.com>, =
<aretana.ietf@gmail.com>, Stephane Litkowski =
<stephane.litkowski@orange.com>
    Resent-Date: Friday, December 7, 2018 at 9:11 PM
   =20
        Hi Adrian,
       =20
        Thank you very much for your detailed review and comments.
        We will take care of all the nits that you have pointed out and =
include the reference to the IEEE/ACM TON paper (the link you have =
pointed out is indeed correct).
       =20
        However, I had one query. Most of the time research =
journal/conference papers will be behind a paywall and there may not be =
a free cached copy available online.
        How do we get across this problem?
       =20
        Best,
        --Satya
       =20
        On 12/7/18, 7:20 AM, "Adrian Farrel" <adrian@olddog.co.uk> =
wrote:
       =20
            Reviewer: Adrian Farrel
            Review result: Has Nits
           =20
            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.
           =20
            Document: draft-ietf-bess-evpn-df-election-framework-06.txt
            Reviewer: Adrian Farrel
            Review Date: 2018-12-07
            IETF LC End Date: 2018-12-18
            Intended Status: Standards Track
           =20
            Summary:
           =20
            This document is basically ready for publication, but has =
nits that should be
            considered prior to publication.
           =20
            Comments:
           =20
            This document addresses issues in the default election =
algorithm used for
            Designated Forwarder Election in EVPN (RFC 7432 and RFC =
8124) by defining a new
            election algorithm and a capability to influence the =
election result for a
            VLAN, depending on the state of the associated Attachment =
Circuit.
           =20
            This is an exceptionally clear and well written document. =
The authors and the
            working group are to be congratulated.
           =20
            During my review I observed a number of small issues and =
editorial nits. I
            don't believe any of these is cause for discussion in the =
working group, but it
            would be sensible to resolve them before publication.
           =20
            Thanks and Happy Christmas,
            Adrian
            --
            It's Christmas.
            Buy someone you love a book of fairy tales.
            https://www.feedaread.com/profiles/8604/
            Available from your favourite online bookseller.
            Or contact me to receive a signed copy by mail.
           =20
            =3D=3D=3D
           =20
            Major Issues:
             No major issues found
           =20
            =3D=3D=3D
           =20
            Minor Issues:
           =20
            HRW1999 is provided as a normative reference, and from the =
text I can
            see why. But no URL (stable or otherwise) is given for the =
reference.
            Using my favorite search engine, I looked for and found a =
copy of
            the referenced document on the IEEE site behind a paywall. I =
don't
            think that will do at all. However, there is a version at
            =
https://www.microsoft.com/en-us/research/wp-content/uploads/2017/02/HRW98=
.pdf
            That appears to be dated 1998, but otherwise could be the =
same paper.
   =20
    [JORGE] ok, we added the link and move it to informative references. =
Thanks!
           =20
            ---
           =20
            When I read in Section 3...
           =20
               In addition, since the specification in EVPN
               [RFC7432] does leave several questions open as to the =
precise final
               state machine behavior of the DF election, section 3.1 =
describes
               precisely the intended behavior.
           =20
            ... I wondered whether this document is updating 7432 in =
that respect.
           =20
            Other features later in the document (such as section 5) =
confirm this.
   =20
    [JORGE] it's not the first comment suggesting this. The intend is =
definitively not to update RFC7432 but to specified new procedures, that =
was the agreement so far. In other words, this work does not mandate an =
upgrade of all the systems supporting RFC7432. The RFC7432 are still =
fine. Maybe we need to rephrase that sentence?=20
           =20
            ---
           =20
            Notwithstanding the mention of backward compatiblity in =
section 6, I
            think it would be a good idea to include a very short =
section 3.2.1.
           =20
            3.2.1.  Backward Compatibility
           =20
               Legacy implementations (i.e., those that predate this =
specification)
               will not advertise the DF Election Extended Community.  =
That means
               that all other participating PEs will not receive DF =
preferences and
               will revert to the defailt algorithm without =
AC-Influenced DF
               Election.
           =20
               Similarly, a legacy implementation receiving a DF =
Election Extended
               Community will ignore it and will continue to use the =
default
               algorithm.
   =20
    [JORGE] Thank you. We took you text slightly modified:
   =20
    ***3.2.1. Backward Compatibility
   =20
       [RFC7432] implementations (i.e., those that predate this
       specification) will not advertise the DF Election Extended =
Community.
       That means that all other participating PEs will not receive DF
       preferences and will revert to the Default DF Election algorithm
       without AC-Influenced DF Election.
   =20
       Similarly, a [RFC7432] implementation receiving a DF Election
       Extended Community will ignore it and will continue to use the
       Default DF Election algorithm.***
           =20
            ---
           =20
            On first reading, I missed an important subtlty in 3.2. The =
paragraph...
           =20
                 - Otherwise if even a single advertisement for the =
type-4 route is
                   not received with the locally configured DF Alg and =
capability,
                   the default DF Election algorithm (modulus) algorithm =
MUST be
                   used as in [RFC7432].
           =20
            ...is really important because it handles what to do if =
different
            participating PEs disagree about which algorithm to use.  =
Your text is
            perfectly fine and adequate, but the "locally configured" =
sort of hid
            it from me first time around.
           =20
            Maybe add a sentence to the end of the bullet point to =
say...
           =20
            "This procedure handles the case where participating PEs =
disagree about
            the DF algorithm and capability to apply."
   =20
   =20
    [JORGE] added, thanks.
           =20
            ---
           =20
            Section 4 introduces 8124 for the first time. It's good that =
this is
            applicable to private wire EVPN as well as 7432 EVPN. Maybe =
bring this
            into focus in the Introducion?
           =20
            It does make me wonder whether you are also updating 8124.
    [JORGE] Added this to the introduction. See my comment above about =
updating specs.
    "The procedures described in this document apply to [RFC7432] and =
[RFC8214] EVPN networks."
           =20
            ---
           =20
            I think section 7 is good. Since you note that the "unfair" =
situation
            may be created maliciously, should you note that there is =
also scope for
            a downgrade attach where the advertisement from one PE is =
hidden, the
            preferred algorithm is modified to any unexpected value, or =
any
            unexpected bit in the capabilities bitfield is set? I think =
such an
            attack assumes either a subversion of the PE (perhaps via =
its
            configuration) or modification of the BGP message. Thus, it =
is not a
            probable if adequate existing security mechanisms are used.
   =20
    [JORGE] added this sentence: *** Note that the network will not =
benefit of the new
       procedures if the configuration of one of the PEs in the ES is
       changed to the default [RFC7432] DF Election.***
           =20
            =3D=3D=3D
           =20
            Nits:
           =20
            The RFC Editor will require that the first section in the =
document is
            the Introduction.
   =20
    [JORGE] changed, thanks.
           =20
            ---
           =20
            You use VNI and I-SID without expansion.
    [JORGE] expanded in the first occurrence.
           =20
            ---
           =20
            2.1
            s/proposes/defines/
    [JORGE] done, thx
           =20
            ---
           =20
            2.3
            s/procedure Generally,/procedure.  Generally,/
    [JORGE] done, thx
           =20
            ---
           =20
            3.2 has
           =20
               For the DF election procedures to be consistent and =
unanimous, it is
               necessary that all the participating PEs agree on the DF =
Election
               algorithm and capabilities to be used.
           =20
            This is exactly the type of statement I was hoping for when =
I opened the
            document, so thanks. But... :-)
           =20
            This depends slightly on the definition of "all =
participating PEs". You
            don't need all PEs in the EVPN to use the same algorithm, =
only the PEs
            that share multi-homing connections.
           =20
            You also use the term in 2.1 and other places in the =
document, so
            perhaps I am worrying too much.
    [JORGE] added "all participating PEs ***in the ES***"
           =20
            ---
           =20
            4.
            s/the state of the server states/the server states./
            s/on Unix utilities rand and srand/on the Unix utilities =
rand and srand/
    [JORGE] done, thx
           =20
            ---
           =20
            I am not sure why you describe Wrand2 in section 4.2 because =
you
            immediately decide to not use it. Maybe you can just =
describe Wrand and
            observe that does the job?
    [JORGE] that's a question for Satya, Satya??
[Satya] Yes, we can remove Wrand2. It is not necessary to describe it.
           =20
            ---
           =20
            4.2
               s/HRW solves the disadvantage/HRW solves the =
disadvantages/
    [JORGE] done, thx
           =20
           =20
           =20
       =20
       =20
   =20
   =20
   =20



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From: Xiejingrong <xiejingrong@huawei.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi Jeffrey,

Thanks for clarifying that there is nothing special on data-plane comparing=
 to the Upstream-assigned label following a P2MP label as mentioned in RFC6=
513. It help me much.

About the case (maybe the worst case) when it is difficult to allocate a 'd=
omain-wide unique' DCB-context-label,
do you think it helpful for an allocation of 'reserved' label (value from 0=
 to 15) to represent a 'Context-label' to make the interoperability mandato=
ry ?

Jingrong


From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Friday, December 14, 2018 11:10 PM
To: Xiejingrong <xiejingrong@huawei.com>; stephane.litkowski@orange.com; be=
ss@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Please see zzh3> below.

From: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>
Sent: Friday, December 14, 2018 2:10 AM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess=
@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Please see xjr3>> below.

From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Thursday, December 13, 2018 10:32 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jingrong,

Please see zzh2> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Wednesday, December 12, 2018 9:24 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess=
@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net<mailto:zzhang@juniper.net=
>>; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.

Zzh2> So I assume you're not objecting to the early allocation for DCB-flag=
 at least?
XJR3>> I don't understand how a DCB-flag in PTA is necessary in opinion-1. =
 Does it used to do consistency check ?

Zzh3> If you don't carry that flag, how do you know if the label is upstrea=
m assigned or from the DCB?

But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?

Zzh2> Nowadays with the adoption of SR, allocating SAME SRGBs across router=
s is not difficult and is the preferred way. If you use DCB (could just be =
the SRGB itself) for non-segmented case, what's the concern with allocating=
 a context label from the DCB/SRGB? See later comment about BIER-context.
XJR3>> OK for non-segmented case (mainly intra-area, at least intra-AS case=
).

For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

Zzh2> There is no 3a. There could be multiple DCB labels for multiple conte=
xt label spaces, either because of scaling requirement (in theory) or for w=
hatever reason an operator wants to use multiple.
Zzh2> I don't think selectively installing upstream assigned labels based o=
n UMH is good enough (and it introduces more complexity). The sources could=
 be everywhere, and in case of EVPN, the forwarding could be (*,g) based, s=
o you'll end up with the original problem.
XJR3>> OK. Thanks for the clarification.
XJR3>> For segmented case stated in this opinion, the section 2.2.2.1 state=
d that, it does not address the original scaling issue.

Zzh3> Let's walk through these steps:
Zzh3> 1) Even in the non-segmented case, you're concerned that it may not b=
e easy to allocate a common DCB across all routers. If that's a real concer=
n, you can have a separate context label space (or even a few of them) shar=
ed by all PEs (instead of one context label space for every ingress PE). Th=
ose context label spaces can be identified by the context labels allocated =
from a smaller DCB. That's the rational for the "Context Label Space ID" Ex=
tended Community. While using a few context label spaces still requires a r=
outer to implement infrastructure for context label spaces, it is better to=
 only need to support a few context label spaces than having to scale to th=
ousands of context label spaces.
Zzh3> 2) In segmented case, while you still need one label for each S-PMSI,=
 using a few context label spaces is better than having to scale to thousan=
ds of context label spaces - see 1) above.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.

Zzh2> If one can do common SRGB for SR, then one can do DCB for MVPN/EVPN. =
If you're still concerned with that, you can have a separate context label =
space for EVPN/MVPN purpose, with the context label from the DCB/SRGB. I do=
n't want to tie it to BIER only though, because the problem and solution eq=
ually applies to P2MP tunnels.
XJR3>> Yes, good enough to use in intra-AS/intra-area cases for DCB/SRGB. F=
or Inter-area/inter-AS case, I hope it can to help non-segmented MVPN deplo=
yment but I am worrying about that.

Zzh3> It's not intra-AS/area vs. inter-AS/area. It's non-segmented vs. segm=
ented. When there is no segmentation, you don't need to allocate different =
labels for each S-PMSI so DCB may be large enough. When there is segmentati=
on you have to allocate different labels for different S-PMSI, so if DCB is=
 not big enough, you can use context label spaces identified by DCB labels.
Zzh3> I would not worry about allocating DCB across AS boundary in case of =
non-segmentation - if you do not need to segmentation across AS boundary, m=
ost likely the ASes belong to the same operator or the operators are friend=
ly enough to work out a DCB.

DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).

Zzh2> Practically, operators strongly desire to use common SRGBs. Vendors h=
ad resisted the push for using common SRGBs but now have given up.
XJR3>> I guess the acceptance of SRGB may not occur if the "safety belt" is=
 not invented. Anyway, I feel worried that, even a small DCB block can be d=
ifficult in case out of intra-AS/intra-area scope.

Zzh3> Common SRGB is a fact nowadays.
Zzh3> What better "safety belt" do you need/envision than using a few conte=
xt label spaces? If you worry about the practicality of a small DCB block a=
cross many PEs, do you not worry about PEs scaling up to thousands of conte=
xt label spaces (that are needed for upstream assigned labels)?

Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.

Zzh2> There is no need, and it is not desired to have a BIER-specific conte=
xt. Besides, defining a new BIER header's "proto" value to indicate a subse=
quent context label space should first be discussed in BIER WG; if that pas=
ses, then we come back to (or at least involve) BESS WG to enhance MVPN/EVP=
N signaling so that every PE knows where to allocate labels and where to in=
stall forwarding state.
XJR3>> OK.  BIER has the proto field for easily extending, we can move this=
 discussion to BIER or personally.

Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

Zzh2> Compared to existing method of using upstream assigned labels, what i=
s the complexity? Upstream assigned labels are assigned from the assigner's=
 main/default label space; the "dynamic" allocation scheme in option-3 allo=
cates from a label block (of a context label space identified by a DCB labe=
l) assigned to the assigner. If the need to maintain that extra label block=
 information is complicated, wouldn't it be more complicated to selectively=
 install upstream-assigned labels based on UMH selection (forget about that=
 it would not work all the time)?
XJR3>> For non-segmented aggregrated-P2MP or MP2MP deployment, I was convin=
ced to believe it is useful even introducing the extra protocol extension (=
see IANA part of the draft).
XJR3>> If I understand correctly, the data-plane also have some change too.=
 A VPN need to be identified by a DCB-context-label (to identify the follow=
ing label is not from a main/default space), and a following COMMON vpn lab=
el. It is not common in current MPLS world and may need some change in data=
-plane.

Zzh3> There is nothing special here. In the upstream assigned case, the bas=
e tunnel label (from the data-receiving router's main/default label space) =
tells you which context label space to look up the next label (that identif=
ies the VPN/BD/ES in our case). Here, the DCB context label (also from the =
data-receiving router's main/default label space) tells you which context l=
abel space to use for the next label lookup.

Zzh> If that is not convincing enough, what is a better solution? I know yo=
u have proposed doing IP lookup - we discussed in a separate thread on the =
pros/cons of that and we're working together on a separate draft on that, r=
ight? I also have a short section 2.2.2.3 on that.
XJR3>> I am not convinced to follow the DCB-context-label for BIER or for S=
egmented MVPN case.
Zzh3> I hope the responses above help.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Zzh2> The use cases and problem domains are discussed in section 2.1, and m=
ore complicated scenarios are followed-up in section 2.2.
Zzh2> About "what it don't" - can you point out the areas that you think th=
is draft should cover or explicitly declare out of scope?

XJR3>> the section 2.2.2.1 stated that, "it does not address the original s=
caling issue". I just feel that, the draft can remove the segmented case ou=
t of the DCB-context-label solution if it does not match well (though it ma=
y work).

Zzh3> We have to discuss the issue with the segmentation (otherwise one may=
 ask "what about segmentation") and we give the best solution so far. I can=
 add "better/other solutions are beyond the scope of this document" if you =
want :)

XJR3>> So does the case of MVPN/EVPN using BIER.

Zzh3> The spec starts discussing the issue using the BIER example; it also =
points out the issue is not unique with BIER (though it's most acute with B=
IER). The solution works for BIER as well as P2MP tunnel aggregation (I als=
o have alluded to the applicability for IR though the text has not been pub=
lished). In particular, the specification/procedures part has nothing BIER =
specific. What's wrong with that?
Zzh3> Thanks.
Zzh3> Jeffrey

XJR3>> Thanks.
XJR3>> Jingrong

Zzh2> Thanks.
Zzh2> Jeffrey


Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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</head>
<body lang=3D"ZH-CN" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi Jeffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Thanks for clarifying that there is nothing special on data-plane=
 comparing to the Upstream-assigned label following a P2MP label as mention=
ed in RFC6513. It help me much.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">About the case (maybe the worst case) when it is difficult to all=
ocate a 'domain-wide unique' DCB-context-label,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">do you think it helpful for an allocation of &#8216;reserved&#821=
7; label (value from 0 to 15) to represent a &#8216;Context-label&#8217; to=
 make the interoperability mandatory ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
<br>
<b>Sent:</b> Friday, December 14, 2018 11:10 PM<br>
<b>To:</b> Xiejingrong &lt;xiejingrong@huawei.com&gt;; stephane.litkowski@o=
range.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Please see zzh3&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xieji=
ngrong@huawei.com</a>&gt;
<br>
<b>Sent:</b> Friday, December 14, 2018 2:10 AM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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;color=
:#1F497D">Hi Jeffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Please see
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:blue">xjr3&gt;&=
gt;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#1F497D"> be=
low.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">=
mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:32 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Hi Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh2&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Wednesday, December 12, 2018 9:24 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">s/inter-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Xiejingrong
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:9.0pt">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Let m=
e take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; In sum=
mary, labels can be allocated and advertised the following<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; ways:<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 1.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from the DCB.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication that they are=
 from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 2.&nbs=
p; A central authority allocates per-VPN/BD/ES labels from a few<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; common context label spaces,
</span><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;co=
lor:red">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:red">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</span><span lang=
=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp; =
PEs advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels along with the context-identifying labels.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; 3.&nbs=
p; A central authority assigns disjoint label blocks from those a //<o:p></=
o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allocate labels =
from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbsp; Each PE a=
llocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; labels from its assigned label block independently for it=
s<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-identifying labe=
ls.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; Option=
 1 is simplest, but it requires that all the PEs set aside a<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; common=
 label block for the DCB that is large enough for all the<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; VPNs/B=
Ds/ESes combined.&nbsp; Option 3 is needed only for segmented<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; select=
ive tunnels that are set up dynamically.&nbsp; Multiple options<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; could =
be used in any combination depending on the deployment<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Courier New&quot;;color:navy">&nbsp;&nbsp; situat=
ion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Optio=
n-1 is simplest and I like it very much (anyone who don&#8217;t like simpli=
fication?). For Inter-area EVPN deployment scenarios, it is strong and simp=
le enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; So I assume you&#8217;re not objecting to the early allo=
cation for DCB-flag at least?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; I don&#8217;t understand how a DCB-flag in PTA is neces=
sary in opinion-1. &nbsp;Does it used to do consistency check ?</span><span=
 lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; If you don&#8217;t carry that flag, how do you know if t=
he label is upstream assigned or from the DCB?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">But w=
hen it is not the suitable case, and Option-2 has to be used, I think thing=
s are becoming complex: You still need a DCB from &#8216;main/default&#8217=
; label-space, though this DCB is very small, which
 maybe only include ONE label. And then the ONE label is used as &#8216;con=
text-label&#8217;. While for BIER case, BIER header itself can act as a &#8=
216;BIER-Context&#8217; naturally. Am I understanding correctly ?<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Nowadays with the adoption of SR, allocating SAME SRGBs =
across routers is not difficult and is the preferred way. If you use DCB (c=
ould just be the SRGB itself) for non-segmented
 case, what&#8217;s the concern with allocating a context label from the DC=
B/SRGB? See later comment about BIER-context.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; OK for non-segmented case (mainly intra-area, at least =
intra-AS case).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">For O=
ption-3, I do understand it as two sub-options, Option-3a if there is enoug=
h number of Labels in the DCB, and Option-3b if there isn&#8217;t and the O=
NE &#8216;DCB&#8217; label is used as context-label. Each
 one is difficult for me to consider the development and deployment. One th=
e other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechanism to=
 select the right upstream-assigned VpnLabel to download to forwarding stat=
es.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; There is no 3a. There could be multiple DCB labels for m=
ultiple context label spaces, either because of scaling requirement (in the=
ory) or for whatever reason an operator wants
 to use multiple.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; I don&#8217;t think selectively installing upstream assi=
gned labels based on UMH is good enough (and it introduces more complexity)=
. The sources could be everywhere, and in case
 of EVPN, the forwarding could be (*,g) based, so you&#8217;ll end up with =
the original problem.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; OK. Thanks for the clarification.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; For segmented case stated in this opinion, the section =
2.2.2.1 stated that, it does not address the original scaling issue.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; Let&#8217;s walk through these steps:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; 1) Even in the non-segmented case, you&#8217;re concerne=
d that it may not be easy to allocate a common DCB across all routers. If t=
hat&#8217;s a real concern, you can have a separate context
 label space (or even a few of them) shared by all PEs (instead of one cont=
ext label space for every ingress PE). Those context label spaces can be id=
entified by the context labels allocated from a smaller DCB. That&#8217;s t=
he rational for the &#8220;Context Label Space
 ID&#8221; Extended Community. While using a few context label spaces still=
 requires a router to implement infrastructure for context label spaces, it=
 is better to only need to support a few context label spaces than having t=
o scale to thousands of context label
 spaces.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; 2) In segmented case, while you still need one label for=
 each S-PMSI, using a few context label spaces is better than having to sca=
le to thousands of context label spaces &#8211;
 see 1) above.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">So my=
 summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to VNI very much, but the MPLS labels in the &#8220;main/default&=
#8221; space is very costly due to the &#8216;per-platform&#8217; (RFC5331)=
 allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; If one can do common SRGB for SR, then one can do DCB fo=
r MVPN/EVPN. If you&#8217;re still concerned with that, you can have a sepa=
rate context label space for EVPN/MVPN purpose,
 with the context label from the DCB/SRGB. I don&#8217;t want to tie it to =
BIER only though, because the problem and solution equally applies to P2MP =
tunnels.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; Yes, good enough to use in intra-AS/intra-area cases fo=
r DCB/SRGB. For Inter-area/inter-AS case, I hope it can to help non-segment=
ed MVPN deployment but I am worrying about that.</span><span lang=3D"EN-US"=
 style=3D"font-size:12.0pt;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; It&#8217;s not intra-AS/area vs. inter-AS/area. It&#8217=
;s non-segmented vs. segmented. When there is no segmentation, you don&#821=
7;t need to allocate different labels for each S-PMSI so DCB
 may be large enough. When there is segmentation you have to allocate diffe=
rent labels for different S-PMSI, so if DCB is not big enough, you can use =
context label spaces identified by DCB labels.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; I would not worry about allocating DCB across AS boundar=
y in case of non-segmentation &#8211; if you do not need to segmentation ac=
ross AS boundary, most likely the ASes belong to
 the same operator or the operators are friendly enough to work out a DCB.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">DCB i=
s similar to SRGB very much, but DCB requires &#8216;absolute&#8217; unique=
 value other than the &#8216;unique&#8217; index in SRGB(at least has such =
mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Practically, operators strongly desire to use common SRG=
Bs. Vendors had resisted the push for using common SRGBs but now have given=
 up.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; I guess the acceptance of SRGB may not occur if the &#8=
220;safety belt&#8221; is not invented. Anyway, I feel worried that, even a=
 small DCB block can be difficult in case out of intra-AS/intra-area
 scope.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; Common SRGB is a fact nowadays.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; What better &#8220;safety belt&#8221; do you need/envisi=
on than using a few context label spaces? If you worry about the practicali=
ty of a small DCB block across many PEs, do you not worry
 about PEs scaling up to thousands of context label spaces (that are needed=
 for upstream assigned labels)?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f context-label from a DCB can be comparable to the use of the &#8216;BIER-=
specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; There is no need, and it is not desired to have a BIER-s=
pecific context. Besides, defining a new BIER header&#8217;s &#8220;proto&#=
8221; value to indicate a subsequent context label space should
 first be discussed in BIER WG; if that passes, then we come back to (or at=
 least involve) BESS WG to enhance MVPN/EVPN signaling so that every PE kno=
ws where to allocate labels and where to install forwarding state.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; OK. &nbsp;BIER has the proto field for easily extending=
, we can move this discussion to BIER or personally.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Use o=
f &#8216;dynamic&#8217; allocation with DCB mechanism in segmented MVPN dep=
loyment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Compared to existing method of using upstream assigned l=
abels, what is the complexity? Upstream assigned labels are assigned from t=
he assigner&#8217;s main/default label space; the
 &#8220;dynamic&#8221; allocation scheme in option-3 allocates from a label=
 block (of a context label space identified by a DCB label) assigned to the=
 assigner. If the need to maintain that extra label block information is co=
mplicated, wouldn&#8217;t it be more complicated to
 selectively install upstream-assigned labels based on UMH selection (forge=
t about that it would not work all the time)?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; For non-segmented aggregrated-P2MP or MP2MP deployment,=
 I was convinced to believe it is useful even introducing the extra protoco=
l extension (see IANA part of the draft).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:blue">XJR3&gt;&gt; If I understand correctly, the data-plane also have som=
e change too. A VPN need to be identified by a DCB-context-label (to identi=
fy the following label is not from a main/default
 space), and a following COMMON vpn label. It is not common in current MPLS=
 world and may need some change in data-plane.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; There is nothing special here. In the upstream assigned =
case, the base tunnel label (from the data-receiving router&#8217;s main/de=
fault label space) tells you which context label
 space to look up the next label (that identifies the VPN/BD/ES in our case=
). Here, the DCB context label (also from the data-receiving router&#8217;s=
 main/default label space) tells you which context label space to use for t=
he next label lookup.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; If that is not convincing enough, what is a better soluti=
on? I know you have proposed doing IP lookup &#8211; we discussed in a sepa=
rate thread on the pros/cons of that and we&#8217;re
 working together on a separate draft on that, right? I also have a short s=
ection 2.2.2.3 on that.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt;
</span><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:blue">I am not =
convinced to follow the DCB-context-label for BIER or for Segmented MVPN ca=
se.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; I hope the responses above help.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">I sug=
gest this draft to make more clear what the use cases are, what it really w=
ant to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; The use cases and problem domains are discussed in secti=
on 2.1, and more complicated scenarios are followed-up in section 2.2.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; About &#8220;what it don&#8217;t&#8221; &#8211; can you =
point out the areas that you think this draft should cover or explicitly de=
clare out of scope?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; the section 2.2.2.1 stated that, &#8220;it does not add=
ress the original scaling issue&#8221;. I just feel that, the draft can rem=
ove the segmented case out of the DCB-context-label solution
 if it does not match well (though it may work).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; We have to discuss the issue with the segmentation (othe=
rwise one may ask &#8220;what about segmentation&#8221;) and we give the be=
st solution so far. I can add &#8220;better/other solutions
 are beyond the scope of this document&#8221; if you want </span><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;font-family:Wingdings;color:#1F497D">J=
</span><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; So does the case of MVPN/EVPN using BIER.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; The spec starts discussing the issue using the BIER exam=
ple; it also points out the issue is not unique with BIER (though it&#8217;=
s most acute with BIER). The solution works for
 BIER as well as P2MP tunnel aggregation (I also have alluded to the applic=
ability for IR though the text has not been published). In particular, the =
specification/procedures part has nothing BIER specific. What&#8217;s wrong=
 with that?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh3&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; Thanks.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:blue">XJR3&gt;&gt; Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh2&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Thank=
s.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt">Jingr=
ong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> Jeffrey (Zhaohui) Zhang [<a href=3D"mailto:zzhang@juniper.net">=
mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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:12.0pt;color=
:#1F497D">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<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;color=
:#1F497D">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please note that this is not a LC for the draft. This is the poll for earl=
y allocation for the DCB-flag and an extended community type.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I remember I have raised my concerns, but I didn&#8217;t find the=
 response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color=
:#1F497D">Zzh&gt; Sorry for missing those. Please see below.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Copy the concerns I have listed before:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">1.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">The problem stated by this draft is valid, and the propos=
ed method is useful for some of the listed problem. For example, EVPN BUM w=
ho uses MPLS identification and dataplane.
</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-US" style=3D"font-size:12.0pt;color:#1F497D">Zzh&=
gt; Do you think the proposed solution is reasonable for the problems? If s=
o, we would like to see early allocation is
 done. The allocation is temporary &#8211; it would time out after some tim=
e if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">2.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">EVPN BUM using vxlan/vni identification may not need a MP=
LS label to identify the vpn/tenant.</span><span lang=3D"EN-US" style=3D"fo=
nt-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 The draft is about &#8220;aggregation label&#8221;, so vxlan/vni is irrele=
vant. On the other hand, in case of vxlan/vni, the VNI is no different from=
 a DCB label in concept (so the solution of using DCB
 label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">3.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For MVPN who has a UMH(Upstream Multicast Hop) selection =
procedure, the exist using of upstream-assigned VpnLabel can be optimized t=
o only populate to forwarding-state
 when there are c-multicast flows selecting the specific UMH PE.</span><spa=
n lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 If that is a better solution, perhaps a separate draft can be written. The=
 solution in this draft is simpler and in concept no different from vxlan c=
ase.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">4.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For an End-to-End deployment of MVPN who spans multi-ASes=
 as the way stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the =
allocation of a global-unique label is useful
 and possible. But operators may need to be very careful to allocate the ve=
ry limited MPLS labels. Because, MPLS labels has been divided to SRLB and S=
RGB, and SRGB may have been again divided by SR-domains according to &lt;dr=
aft-filsfils-spring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span lang=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 What&#8217;s relevant here is the second part of your text above (the &#82=
20;But operators &#8230;&#8221;) &#8211; though that is the same point #5 b=
elow (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">5.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For segmented MVPN deployment, the further divide of the =
MPLS Label is also difficult when thinking of the above.</span><span lang=
=3D"EN-US" style=3D"font-size:10.5pt"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Zzh&gt;=
 Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D"><span style=3D"mso-list:Ignore">6.<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D">For BIER, is the BIER proto=3D1 indicating a BIER-specifi=
c unique VpnLabel ? or a Per-platform (RFC5331) downstream-assigned unique =
label ? &nbsp;if it is the later one, how about
 adding a new BIER proto value to indicating a BIER-specific unique VpnLabe=
l ? &nbsp;And then a static Context (BIER) can be optional to the dynamic a=
dvertising of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; In BIER header, proto=3D1 indicates downstream-assigned l=
abel. There is no need to define a new BIER specific proto value. The reaso=
n is that &#8220;downstream-assigned label&#8221; just
 means that it is a label in the &#8220;main/default&#8221; label space of =
the receiving router, and a DCB label is just that. Nothing is BIER specifi=
c here. I believe Tony also responded to you (and in BIER WG).<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><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">From:</span></b><span lang=
=3D"EN-US"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-boun=
ces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<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">Hi WG,<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">We have received an early alloc=
ation request for the draft-ietf-bess-mvpn-evpn-aggregation-label.<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">Please raise your concerns if y=
ou object to this request and if you think that the document is not mature =
enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Feel also free to support this =
request.<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">We will wait until next Monday =
(12/17) to gather feedbacks.<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,<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" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">_____________________________________________________________=
____________________________________________________________<o:p></o:p></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Ce message et ses pieces jointes peuvent contenir des informa=
tions confidentielles ou privilegiees et ne doivent donc<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">pas etre diffuses, exploites ou copies sans autorisation. Si =
vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">a l'expediteur et le detruire ainsi que les pieces jointes. L=
es messages electroniques etant susceptibles d'alteration,<o:p></o:p></span=
></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Orange decline toute responsabilite si ce message a ete alter=
e, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">This message and its attachments may contain confidential or =
privileged information that may be protected by law;<o:p></o:p></span></pre=
>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">they should not be distributed, used or copied without author=
isation.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">If you have received this email in error, please notify the s=
ender and delete this message and its attachments.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">As emails may be altered, Orange is not liable for messages t=
hat have been modified, changed or falsified.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Thank you.<o:p></o:p></span></pre>
</div>
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From: <stephane.litkowski@orange.com>
To: Xiejingrong <xiejingrong@huawei.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/tVzuvNzo-AnxkfTVvH6DqSWOiZI>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Thanks for the clarification.

From: Xiejingrong [mailto:xiejingrong@huawei.com]
Sent: Friday, December 14, 2018 08:20
To: LITKOWSKI Stephane OBS/OINIS; Jeffrey (Zhaohui) Zhang; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Stephane,

Thank you for raising the meaningful discussion on this draft.

I am not against the early allocation, because the allocation needed by the=
 DCB-context-label can help the aggregated  P2MP/MP2MP for MVPN/EVPN as an =
extension to the current RFC6513.

I am not convinced to follow the DCB-context-label for BIER/SegmentedMVPN c=
ases,  but this can be discussed later.

Thanks,
Jingrong.


From: stephane.litkowski@orange.com [mailto:stephane.litkowski@orange.com]
Sent: Thursday, December 13, 2018 4:40 PM
To: Xiejingrong <xiejingrong@huawei.com>; Jeffrey (Zhaohui) Zhang <zzhang@j=
uniper.net>; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jingrong,

Speaking as co-chair, what I need to know from this discussion is if there =
is a blocking point for the early allocation.
Yes, of course the draft will require some polishing, clarifications... as =
Jeffrey has mentioned, this is not a WGLC.

Based on your last sentence (and the overall discussion), I don't see any r=
eal blocking point but I want this to be crystal clear. So please state cle=
arly if you object to the early allocation or not and why. What is importan=
t to me is to ensure that the encoding is stable and does not require any c=
hange.


Thanks,

Stephane



From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Xiejingrong
Sent: Thursday, December 13, 2018 03:24
To: Jeffrey (Zhaohui) Zhang; LITKOWSKI Stephane OBS/OINIS; bess@ietf.org<ma=
ilto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label


s/inter-area/intra-area/g

From: Xiejingrong
Sent: Thursday, December 13, 2018 10:22 AM
To: 'Jeffrey (Zhaohui) Zhang' <zzhang@juniper.net<mailto:zzhang@juniper.net=
>>; stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Let me take the section 2.2.3 for explaination:

   In summary, labels can be allocated and advertised the following
   ways:

   1.  A central authority allocates per-VPN/BD/ES labels from the DCB.
       PEs advertise the labels with an indication that they are from
       the DCB.

   2.  A central authority allocates per-VPN/BD/ES labels from a few
       common context label spaces, and allocate labels from the DCB to
       identify those context label spaces.  PEs advertise the VPN/BD
       labels along with the context-identifying labels.

   3.  A central authority assigns disjoint label blocks from those a //
       few context label spaces to each PE, and allocate labels from the
       DCB to identify the context label spaces.  Each PE allocates
       labels from its assigned label block independently for its
       segmented S-PMSI, along with the context-identifying labels.

   Option 1 is simplest, but it requires that all the PEs set aside a
   common label block for the DCB that is large enough for all the
   VPNs/BDs/ESes combined.  Option 3 is needed only for segmented
   selective tunnels that are set up dynamically.  Multiple options
   could be used in any combination depending on the deployment
   situation.

Option-1 is simplest and I like it very much (anyone who don't like simplif=
ication?). For Inter-area EVPN deployment scenarios, it is strong and simpl=
e enough I think.
But when it is not the suitable case, and Option-2 has to be used, I think =
things are becoming complex: You still need a DCB from 'main/default' label=
-space, though this DCB is very small, which maybe only include ONE label. =
And then the ONE label is used as 'context-label'. While for BIER case, BIE=
R header itself can act as a 'BIER-Context' naturally. Am I understanding c=
orrectly ?
For Option-3, I do understand it as two sub-options, Option-3a if there is =
enough number of Labels in the DCB, and Option-3b if there isn't and the ON=
E 'DCB' label is used as context-label. Each one is difficult for me to con=
sider the development and deployment. One the other hand, the segmented MVP=
N can use the 'UMH' mechanism to select the right upstream-assigned VpnLabe=
l to download to forwarding states.

So my summarized comments:
DCB is similar to VNI very much, but the MPLS labels in the "main/default" =
space is very costly due to the 'per-platform' (RFC5331) allocation.
DCB is similar to SRGB very much, but DCB requires 'absolute' unique value =
other than the 'unique' index in SRGB(at least has such mechanism).
Use of context-label from a DCB can be comparable to the use of the 'BIER-s=
pecific' context in case of BIER.
Use of 'dynamic' allocation with DCB mechanism in segmented MVPN deployment=
 may add extra complexity.

I suggest this draft to make more clear what the use cases are, what it rea=
lly want to solve, and what it don't.

Thanks.
Jingrong



From: Jeffrey (Zhaohui) Zhang [mailto:zzhang@juniper.net]
Sent: Wednesday, December 12, 2018 10:42 PM
To: Xiejingrong <xiejingrong@huawei.com<mailto:xiejingrong@huawei.com>>; st=
ephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; bess@iet=
f.org<mailto:bess@ietf.org>
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Jingrong,

Please see zzh> below.

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> On Behalf =
Of Xiejingrong
Sent: Tuesday, December 11, 2018 8:14 PM
To: stephane.litkowski@orange.com<mailto:stephane.litkowski@orange.com>; be=
ss@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label

Objection.

Zzh> Please note that this is not a LC for the draft. This is the poll for =
early allocation for the DCB-flag and an extended community type.

I remember I have raised my concerns, but I didn't find the response.

Zzh> Sorry for missing those. Please see below.

Copy the concerns I have listed before:

1.   The problem stated by this draft is valid, and the proposed method is =
useful for some of the listed problem. For example, EVPN BUM who uses MPLS =
identification and dataplane.
Zzh> Do you think the proposed solution is reasonable for the problems? If =
so, we would like to see early allocation is done. The allocation is tempor=
ary - it would time out after some time if the draft does not become a RFC.

2.   EVPN BUM using vxlan/vni identification may not need a MPLS label to i=
dentify the vpn/tenant.
Zzh> The draft is about "aggregation label", so vxlan/vni is irrelevant. On=
 the other hand, in case of vxlan/vni, the VNI is no different from a DCB l=
abel in concept (so the solution of using DCB label should be reasonable).

3.   For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, th=
e exist using of upstream-assigned VpnLabel can be optimized to only popula=
te to forwarding-state when there are c-multicast flows selecting the speci=
fic UMH PE.
Zzh> If that is a better solution, perhaps a separate draft can be written.=
 The solution in this draft is simpler and in concept no different from vxl=
an case.

4.   For an End-to-End deployment of MVPN who spans multi-ASes as the way s=
tated in <draft-geng-bier-sr-multicast-deployment>, the allocation of a glo=
bal-unique label is useful and possible. But operators may need to be very =
careful to allocate the very limited MPLS labels. Because, MPLS labels has =
been divided to SRLB and SRGB, and SRGB may have been again divided by SR-d=
omains according to <draft-filsfils-spring-large-scale-interconnect-12>.
Zzh> What's relevant here is the second part of your text above (the "But o=
perators ...") - though that is the same point #5 below (please see my resp=
onse below).

5.   For segmented MVPN deployment, the further divide of the MPLS Label is=
 also difficult when thinking of the above.
Zzh> Please see section 2.2.2 of this draft.

6.   For BIER, is the BIER proto=3D1 indicating a BIER-specific unique VpnL=
abel ? or a Per-platform (RFC5331) downstream-assigned unique label ?  if i=
t is the later one, how about adding a new BIER proto value to indicating a=
 BIER-specific unique VpnLabel ?  And then a static Context (BIER) can be o=
ptional to the dynamic advertising of a Context ?
Zzh> In BIER header, proto=3D1 indicates downstream-assigned label. There i=
s no need to define a new BIER specific proto value. The reason is that "do=
wnstream-assigned label" just means that it is a label in the "main/default=
" label space of the receiving router, and a DCB label is just that. Nothin=
g is BIER specific here. I believe Tony also responded to you (and in BIER =
WG).
Zzh> Thanks!
Zzh> Jeffrey

Jingrong


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com<mailto:stephane.litkowski@orange.com>
Sent: Tuesday, December 11, 2018 11:10 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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Thank you.

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pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks for the clarifi=
cation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Xiejingr=
ong [mailto:xiejingrong@huawei.com]
<br>
<b>Sent:</b> Friday, December 14, 2018 08:20<br>
<b>To:</b> LITKOWSKI Stephane OBS/OINIS; Jeffrey (Zhaohui) Zhang; bess@ietf=
.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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;color:#1F497D;mso-fa=
reast-language:ZH-CN">Hi Stephane,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Thank you for raising the meaningful discussion on th=
is draft.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">I am not against the early allocation, because the al=
location needed by the DCB-context-label can help the aggregated &nbsp;P2MP=
/MP2MP for MVPN/EVPN as an extension to the
 current RFC6513.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">I am not convinced to follow the DCB-context-label fo=
r BIER/SegmentedMVPN cases, &nbsp;but this can be discussed later.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Jingrong.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> stephane.litkowski@or=
ange.com [mailto:stephane.litkowski@orange.com]
<br>
<b>Sent:</b> Thursday, December 13, 2018 4:40 PM<br>
<b>To:</b> Xiejingrong &lt;xiejingrong@huawei.com&gt;; Jeffrey (Zhaohui) Zh=
ang &lt;zzhang@juniper.net&gt;; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Hi Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Speaking as co-chair, what I need to know from this discussion is if t=
here is a blocking point for the early allocation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Yes, of course the draft will require some polishing, clarifications&#=
8230; as Jeffrey has mentioned, this is not a WGLC.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Based on your last sentence (and the overall discussion), I don&#8217;=
t see any real blocking point but I want this to be crystal clear. So pleas=
e state clearly if you object to the early
 allocation or not and why. What is important to me is to ensure that the e=
ncoding is stable and does not require any change.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Stephane<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;;mso-fareast-language:ZH-CN">From:</spa=
n></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;=
sans-serif&quot;;mso-fareast-language:ZH-CN"> BESS [<a href=3D"mailto:bess-=
bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Thursday, December 13, 2018 03:24<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang; LITKOWSKI Stephane OBS/OINIS; <a href=
=3D"mailto:bess@ietf.org">
bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">s/inter-area/intra-area/g<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> Xiejingrong
<br>
<b>Sent:</b> Thursday, December 13, 2018 10:22 AM<br>
<b>To:</b> 'Jeffrey (Zhaohui) Zhang' &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Hi Jeffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Let me take the section 2.2.3 for explaination:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; In summary, labels can be allocated and advertised the following<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; ways:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; 1.&nbsp; A central authority allocates per-VPN/BD/ES labels from the =
DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PEs advertise the labels with an indication t=
hat they are from<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the DCB.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; 2.&nbsp; A central authority allocates per-VPN/BD/ES labels from a fe=
w<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; common context label spaces,
</span><span style=3D"font-family:&quot;Courier New&quot;;color:red;mso-far=
east-language:ZH-CN">and allocate labels from the DCB to
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:red;mso-fareast-language:ZH-CN">&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;identify those context label spaces.</spa=
n><span style=3D"font-family:&quot;Courier New&quot;;color:navy;mso-fareast=
-language:ZH-CN">&nbsp; PEs
 advertise the VPN/BD<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; labels along with the context-identifying lab=
els.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; 3.&nbsp; A central authority assigns disjoint label blocks from those=
 a //<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; few context label spaces to each PE, and allo=
cate labels from the<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DCB to identify the context label spaces.&nbs=
p; Each PE allocates<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; labels from its assigned label block independ=
ently for its<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; segmented S-PMSI, along with the context-iden=
tifying labels.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; Option 1 is simplest, but it requires that all the PEs set aside a<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; common label block for the DCB that is large enough for all the<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; VPNs/BDs/ESes combined.&nbsp; Option 3 is needed only for segmented<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; selective tunnels that are set up dynamically.&nbsp; Multiple options=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; could be used in any combination depending on the deployment<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-fa=
mily:&quot;Courier New&quot;;color:navy;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp; situation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Option-1 is simplest and I like it very much (anyone who don&#8217;t=
 like simplification?). For Inter-area EVPN deployment scenarios, it is str=
ong and simple enough I think.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">But when it is not the suitable case, and Option-2 has to be used, I=
 think things are becoming complex: You still need a DCB from &#8216;main/d=
efault&#8217; label-space, though this DCB is very
 small, which maybe only include ONE label. And then the ONE label is used =
as &#8216;context-label&#8217;. While for BIER case, BIER header itself can=
 act as a &#8216;BIER-Context&#8217; naturally. Am I understanding correctl=
y ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">For Option-3, I do understand it as two sub-options, Option-3a if th=
ere is enough number of Labels in the DCB, and Option-3b if there isn&#8217=
;t and the ONE &#8216;DCB&#8217; label is used as context-label.
 Each one is difficult for me to consider the development and deployment. O=
ne the other hand, the segmented MVPN can use the &#8216;UMH&#8217; mechani=
sm to select the right upstream-assigned VpnLabel to download to forwarding=
 states.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">So my summarized comments:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">DCB is similar to VNI very much, but the MPLS labels in the &#8220;m=
ain/default&#8221; space is very costly due to the &#8216;per-platform&#821=
7; (RFC5331) allocation.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">DCB is similar to SRGB very much, but DCB requires &#8216;absolute&#=
8217; unique value other than the &#8216;unique&#8217; index in SRGB(at lea=
st has such mechanism).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Use of context-label from a DCB can be comparable to the use of the =
&#8216;BIER-specific&#8217; context in case of BIER.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Use of &#8216;dynamic&#8217; allocation with DCB mechanism in segmen=
ted MVPN deployment may add extra complexity.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">I suggest this draft to make more clear what the use cases are, what=
 it really want to solve, and what it don&#8217;t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;mso-fareast-language:=
ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> Jeffrey (Zhaohui) Zha=
ng [<a href=3D"mailto:zzhang@juniper.net">mailto:zzhang@juniper.net</a>]
<br>
<b>Sent:</b> Wednesday, December 12, 2018 10:42 PM<br>
<b>To:</b> Xiejingrong &lt;<a href=3D"mailto:xiejingrong@huawei.com">xiejin=
grong@huawei.com</a>&gt;;
<a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.=
com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Jingrong,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Please see zzh&gt; below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<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"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> BESS &lt;<a href=3D"m=
ailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Xiejingrong<br>
<b>Sent:</b> Tuesday, December 11, 2018 8:14 PM<br>
<b>To:</b> <a href=3D"mailto:stephane.litkowski@orange.com">stephane.litkow=
ski@orange.com</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] Poll for early allocation request for draft-ietf=
-bess-mvpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Objection.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; Please note that this is not a LC for the draft. This is the p=
oll for early allocation for the DCB-flag and an extended community type.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">I remember I have raised my concerns, but I didn&#821=
7;t find the response.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; Sorry for missing those. Please see below.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Copy the concerns I have listed before:<o:p></o:p></s=
pan></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">1.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">The problem stated by this draft is valid, and the proposed method is=
 useful for some of the listed problem. For example, EVPN BUM who uses MPLS=
 identification and dataplane.
</span><span style=3D"font-size:10.5pt;mso-fareast-language:ZH-CN"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:12.0pt;color:#1F497D;mso-fareast-language=
:ZH-CN">Zzh&gt; Do you think the proposed solution is reasonable for the pr=
oblems? If so, we would like to see early
 allocation is done. The allocation is temporary &#8211; it would time out =
after some time if the draft does not become a RFC.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">2.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">EVPN BUM using vxlan/vni identification may not need a MPLS label to =
identify the vpn/tenant.</span><span style=3D"font-size:10.5pt;mso-fareast-=
language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; The draft is about &#8220;aggregation label&#8221;, so vxlan/v=
ni is irrelevant. On the other hand, in case of vxlan/vni, the VNI is no di=
fferent from a DCB label in concept (so the solution
 of using DCB label should be reasonable).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">3.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For MVPN who has a UMH(Upstream Multicast Hop) selection procedure, t=
he exist using of upstream-assigned VpnLabel can be optimized to only popul=
ate to forwarding-state when there
 are c-multicast flows selecting the specific UMH PE.</span><span style=3D"=
font-size:10.5pt;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; If that is a better solution, perhaps a separate draft can be =
written. The solution in this draft is simpler and in concept no different =
from vxlan case.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">4.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For an End-to-End deployment of MVPN who spans multi-ASes as the way =
stated in &lt;draft-geng-bier-sr-multicast-deployment&gt;, the allocation o=
f a global-unique label is useful and possible.
 But operators may need to be very careful to allocate the very limited MPL=
S labels. Because, MPLS labels has been divided to SRLB and SRGB, and SRGB =
may have been again divided by SR-domains according to &lt;draft-filsfils-s=
pring-large-scale-interconnect-12&gt;.
 &nbsp;</span><span style=3D"font-size:10.5pt;mso-fareast-language:ZH-CN"><=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; What&#8217;s relevant here is the second part of your text abo=
ve (the &#8220;But operators &#8230;&#8221;) &#8211; though that is the sam=
e point #5 below (please see my response below).<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">5.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For segmented MVPN deployment, the further divide of the MPLS Label i=
s also difficult when thinking of the above.</span><span style=3D"font-size=
:10.5pt;mso-fareast-language:ZH-CN"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">Zzh&gt; Please see section 2.2.2 of this draft.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:21.0pt;text-indent:-21.0=
pt"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-C=
N">6.</span><span style=3D"font-size:7.0pt;font-family:&quot;Times New Roma=
n&quot;,&quot;serif&quot;;color:#1F497D;mso-fareast-language:ZH-CN">&nbsp;&=
nbsp;
</span><span style=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:Z=
H-CN">For BIER, is the BIER proto=3D1 indicating a BIER-specific unique Vpn=
Label ? or a Per-platform (RFC5331) downstream-assigned unique label ? &nbs=
p;if it is the later one, how about adding
 a new BIER proto value to indicating a BIER-specific unique VpnLabel ? &nb=
sp;And then a static Context (BIER) can be optional to the dynamic advertis=
ing of a Context ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; In BIER header, proto=3D1 indicates downstrea=
m-assigned label. There is no need to define a new BIER specific proto valu=
e. The reason is that &#8220;downstream-assigned
 label&#8221; just means that it is a label in the &#8220;main/default&#822=
1; label space of the receiving router, and a DCB label is just that. Nothi=
ng is BIER specific here. I believe Tony also responded to you (and in BIER=
 WG).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Zzh&gt; Jeffrey<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D;mso-fa=
reast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> BESS [<a href=3D"mail=
to:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:stephane.litkowski@orange.com">stepha=
ne.litkowski@orange.com</a><br>
<b>Sent:</b> Tuesday, December 11, 2018 11:10 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Hi WG,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">We have r=
eceived an early allocation request for the draft-ietf-bess-mvpn-evpn-aggre=
gation-label.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Please ra=
ise your concerns if you object to this request and if you think that the d=
ocument is not mature enough.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Feel also=
 free to support this request.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">We will w=
ait until next Monday (12/17) to gather feedbacks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Thanks,<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Stephane<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;;mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">_________________________________________________=
________________________________________________________________________<o:=
p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">Ce message et ses pieces jointes peuvent contenir=
 des informations confidentielles ou privilegiees et ne doivent donc<o:p></=
o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">pas etre diffuses, exploites ou copies sans autor=
isation. Si vous avez recu ce message par erreur, veuillez le signaler<o:p>=
</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">a l'expediteur et le detruire ainsi que les piece=
s jointes. Les messages electroniques etant susceptibles d'alteration,<o:p>=
</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">Orange decline toute responsabilite si ce message=
 a ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">This message and its attachments may contain conf=
idential or privileged information that may be protected by law;<o:p></o:p>=
</span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">they should not be distributed, used or copied wi=
thout authorisation.<o:p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">If you have received this email in error, please =
notify the sender and delete this message and its attachments.<o:p></o:p></=
span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">As emails may be altered, Orange is not liable fo=
r messages that have been modified, changed or falsified.<o:p></o:p></span>=
</pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;ms=
o-fareast-language:ZH-CN">Thank you.<o:p></o:p></span></pre>
</div>
<pre><span style=3D"mso-fareast-language:ZH-CN">___________________________=
___________________________________________________________________________=
___________________<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p=
re>
<pre><span style=3D"mso-fareast-language:ZH-CN">Ce message et ses pieces jo=
intes peuvent contenir des informations confidentielles ou privilegiees et =
ne doivent donc<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">pas etre diffuses, exploite=
s ou copies sans autorisation. Si vous avez recu ce message par erreur, veu=
illez le signaler<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">a l'expediteur et le detrui=
re ainsi que les pieces jointes. Les messages electroniques etant susceptib=
les d'alteration,<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">Orange decline toute respon=
sabilite si ce message a ete altere, deforme ou falsifie. Merci.<o:p></o:p>=
</span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p=
re>
<pre><span style=3D"mso-fareast-language:ZH-CN">This message and its attach=
ments may contain confidential or privileged information that may be protec=
ted by law;<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">they should not be distribu=
ted, used or copied without authorisation.<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">If you have received this e=
mail in error, please notify the sender and delete this message and its att=
achments.<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">As emails may be altered, O=
range is not liable for messages that have been modified, changed or falsif=
ied.<o:p></o:p></span></pre>
<pre><span style=3D"mso-fareast-language:ZH-CN">Thank you.<o:p></o:p></span=
></pre>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
</html>

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From: <stephane.litkowski@orange.com>
To: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: WGLC, IPR and implementation poll for draft-ietf-bess-evpn-bum-procedure-updates
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Date: Mon, 17 Dec 2018 12:49:47 +0000
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Hello Working Group,



This email starts a three weeks Working Group Last Call on  draft-ietf-bess=
-evpn-bum-procedure-updates [1]. The poll period is longer than usual due t=
o the coming vacation period.



This poll runs until *the 7th of January*.



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 no IPR disclosed.



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.



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



    Thank you,

    Stephane & Matthew



    [1] https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-bum-procedure=
-updates/



    [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw


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<p class=3D"MsoPlainText">Hello Working Group,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">This email starts a three weeks Working Group Las=
t Call on &nbsp;draft-ietf-bess-evpn-bum-procedure-updates [1]. The poll pe=
riod is longer than usual due to the coming vacation period.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">This poll runs until *the 7th of January*.<o:p></=
o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for knowledge of any undisclo=
sed IPR that applies to this Document, to ensure that IPR has been disclose=
d in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for=
 more details).<o:p></o:p></p>
<p class=3D"MsoPlainText">If you are listed as an Author or a Contributor o=
f this Document please respond to this email and indicate whether or not yo=
u are aware of any relevant undisclosed IPR. The Document won't progress wi=
thout answers from all the Authors
 and Contributors.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">There is currently no IPR disclosed.&nbsp;&nbsp;<=
o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">If you are not listed as an Author or a Contribut=
or, then please explicitly respond only if you are aware of any IPR that ha=
s not yet been disclosed in conformance with IETF rules.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for any existing implementati=
on as per [2].
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;Thank you,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; Stephane &amp; Matthew<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;[1] <a href=3D"https://da=
tatracker.ietf.org/doc/draft-ietf-bess-evpn-bum-procedure-updates/">
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-bum-procedure-updates=
/</a><o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; [2] <a href=3D"https://mailarc=
hive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

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 ce message par erreur, veuillez le signaler
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
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From: <stephane.litkowski@orange.com>
To: LITKOWSKI Stephane OBS/OINIS <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Date: Mon, 17 Dec 2018 12:54:37 +0000
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Hi,

The WGLC poll is now ended.
We have one comment from Mankamana that requires a reply from the authors.

We are also missing an IPR reply from Richard Schnell from Verizon.

We can't proceed before clearing these two points.

Brgds,

Stephane



From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com
Sent: Monday, December 03, 2018 11:43
To: bess@ietf.org
Subject: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-=
virtual-eth-segment


Hello Working Group,



This email starts a two-week Working Group Last Call on draft-ietf-bess-evp=
n-virtual-eth-segment [1]



This poll runs until *the 17th of December*.



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 no IPR disclosed.



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.



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



    Thank you,

    Stephane & Matthew



    [1] https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-s=
egment/



    [2] https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjq=
Dpw



___________________________________________________________________________=
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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">The WGLC poll is now e=
nded.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We have one comment fr=
om Mankamana that requires a reply from the authors.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We are also missing an=
 IPR reply from Richard Schnell from Verizon.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We can&#8217;t proceed=
 before clearing these two points.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Brgds,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Stephane<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [ma=
ilto:bess-bounces@ietf.org]
<b>On Behalf Of </b>stephane.litkowski@orange.com<br>
<b>Sent:</b> Monday, December 03, 2018 11:43<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] WGLC, IPR and implementation poll for draft-ietf-bes=
s-evpn-virtual-eth-segment<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Hello Working Group,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">This email starts a two-week Working Group Last C=
all on draft-ietf-bess-evpn-virtual-eth-segment [1]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">This poll runs until *the 17th of December*.<o:p>=
</o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for knowledge of any undisclo=
sed IPR that applies to this Document, to ensure that IPR has been disclose=
d in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for=
 more details).<o:p></o:p></p>
<p class=3D"MsoPlainText">If you are listed as an Author or a Contributor o=
f this Document please respond to this email and indicate whether or not yo=
u are aware of any relevant undisclosed IPR. The Document won't progress wi=
thout answers from all the Authors
 and Contributors.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">There is currently no IPR disclosed.&nbsp;&nbsp;<=
o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">If you are not listed as an Author or a Contribut=
or, then please explicitly respond only if you are aware of any IPR that ha=
s not yet been disclosed in conformance with IETF rules.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;<o:p></o:p></p>
<p class=3D"MsoPlainText">We are also polling for any existing implementati=
on as per [2].
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;Thank you,<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; Stephane &amp; Matthew<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;[1] <a href=3D"https://da=
tatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/">
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-virtual-eth-segment/<=
/a><o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; [2] <a href=3D"https://mailarc=
hive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw">
https://mailarchive.ietf.org/arch/msg/bess/cG3X1tTqb_vPC4rg56SEdkjqDpw</a><=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
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From: "Mankamana Mishra (mankamis)" <mankamis@cisco.com>
To: LITKOWSKI Stephane OBS/OINIS <stephane.litkowski@orange.com>,
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Subject: Re: [bess] WGLC, IPR and implementation poll for
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To: "'bess@ietf.org'" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Date: Mon, 17 Dec 2018 12:55:32 +0000
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Subject: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-virtual-eth-segment
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Hello,
I am not aware of any relevant undisclosed IPR for this item.


Regards
Rick Schell
214-202-3464


From nobody Mon Dec 17 05:19:36 2018
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From: <stephane.litkowski@orange.com>
To: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: BESS Wiki draft
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Hi WG,

I have started to build a Wiki page for the BESS WG which gives a detailed =
status of the working group work.
https://trac.ietf.org/trac/bess/wiki/WikiStart

It is still a draft and I would be pleased to welcome your feedback on it o=
n the shape as well as the content.

The WG document status section is almost empty now, but will be enriched wi=
th the expected regular reports (next occurrence being mid-January) from th=
e editors.


Brgds,

Stephane



___________________________________________________________________________=
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rvice" xmlns:mml=3D"http://www.w3.org/1998/Math/MathML" xmlns:st=3D"&#1;" x=
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<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I have started to build a Wiki page for the BESS WG =
which gives a detailed status of the working group work.<o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://trac.ietf.org/trac/bess/wiki/Wiki=
Start">https://trac.ietf.org/trac/bess/wiki/WikiStart</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">It is still a draft and I would be pleased to welcom=
e your feedback on it on the shape as well as the content.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The WG document status section is almost empty now, =
but will be enriched with the expected regular reports (next occurrence bei=
ng mid-January) from the editors.<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">Brgds,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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This message and its attachments may contain confidential or privileged inf=
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they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
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From: <stephane.litkowski@orange.com>
To: LITKOWSKI Stephane OBS/OINIS <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Date: Mon, 17 Dec 2018 13:22:22 +0000
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Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Hi,

This poll is closed now.
It seems that some discussions are required on the document, however it has=
 been confirmed that nothing blocks the early allocation request.
I'm requesting the approval from our AD now.

Brgds,


From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of stephane.litkowski@o=
range.com
Sent: Tuesday, December 11, 2018 16:10
To: bess@ietf.org
Subject: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-=
evpn-aggregation-label

Hi WG,

We have received an early allocation request for the draft-ietf-bess-mvpn-e=
vpn-aggregation-label.

Please raise your concerns if you object to this request and if you think t=
hat the document is not mature enough.
Feel also free to support this request.

We will wait until next Monday (12/17) to gather feedbacks.

Thanks,

Stephane



___________________________________________________________________________=
______________________________________________



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pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
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ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

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Thank you.

___________________________________________________________________________=
______________________________________________

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ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">This poll is closed no=
w.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">It seems that some dis=
cussions are required on the document, however it has been confirmed that n=
othing blocks the early allocation request.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I&#8217;m requesting t=
he approval from our AD now.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Brgds,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [ma=
ilto:bess-bounces@ietf.org]
<b>On Behalf Of </b>stephane.litkowski@orange.com<br>
<b>Sent:</b> Tuesday, December 11, 2018 16:10<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] Poll for early allocation request for draft-ietf-bes=
s-mvpn-evpn-aggregation-label<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi WG,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have received an early allocation request for the=
 draft-ietf-bess-mvpn-evpn-aggregation-label.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please raise your concerns if you object to this req=
uest and if you think that the document is not mature enough.<o:p></o:p></p>
<p class=3D"MsoNormal">Feel also free to support this request.<o:p></o:p></=
p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We will wait until next Monday (12/17) to gather fee=
dbacks.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Stephane<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
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<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
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<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
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</PRE></body>
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: Xiejingrong <xiejingrong@huawei.com>, "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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Date: Mon, 17 Dec 2018 13:18:15 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/QNNU_i19RQg-Ondj8B4bdxNdZ7o>
Subject: Re: [bess] Poll for early allocation request for draft-ietf-bess-mvpn-evpn-aggregation-label
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--_000_DM6PR05MB5036A6CA3857FA4B44655F19D4BC0DM6PR05MB5036namp_
Content-Type: text/plain; charset="us-ascii"
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Hi Jingrong,

Allocating a special label from the 0~15 block is super difficult. I don't =
think our use case is strong enough for that.

Thanks.
Jeffrey

From: Xiejingrong <xiejingrong@huawei.com>
Sent: Sunday, December 16, 2018 11:02 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net>; stephane.litkowski@orange=
.com; bess@ietf.org
Subject: RE: Poll for early allocation request for draft-ietf-bess-mvpn-evp=
n-aggregation-label

Hi Jeffrey,

Thanks for clarifying that there is nothing special on data-plane comparing=
 to the Upstream-assigned label following a P2MP label as mentioned in RFC6=
513. It help me much.

About the case (maybe the worst case) when it is difficult to allocate a 'd=
omain-wide unique' DCB-context-label,
do you think it helpful for an allocation of 'reserved' label (value from 0=
 to 15) to represent a 'Context-label' to make the interoperability mandato=
ry ?

Jingrong



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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"index 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Normal Indent"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"footnote text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"annotation text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"header"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"footer"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"35" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" QFormat=3D"true" Name=3D"caption"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"table of figures"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"envelope address"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"envelope return"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"footnote reference"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"line number"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"endnote reference"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"macro"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"toa heading"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number 5"/>
<w:LsdException Locked=3D"false" Priority=3D"10" QFormat=3D"true" Name=3D"T=
itle"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Closing"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Signature"/>
<w:LsdException Locked=3D"false" Priority=3D"1" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Message Header"/>
<w:LsdException Locked=3D"false" Priority=3D"11" QFormat=3D"true" Name=3D"S=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Salutation"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Date"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text First Indent"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Block Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Hyperlink"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"FollowedHyperlink"/>
<w:LsdException Locked=3D"false" Priority=3D"22" QFormat=3D"true" Name=3D"S=
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<w:LsdException Locked=3D"false" Priority=3D"20" QFormat=3D"true" Name=3D"E=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Document Map"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Plain Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"E-mail Signature"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Top of Form"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Acronym"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Cite"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Code"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
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<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
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<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/=
>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/=
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<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
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<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
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<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
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<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
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<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
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<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
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<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
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<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
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<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"tab-interval:.=
5in">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Hi Jingrong,<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Allocating a special=
 label from the 0~15 block is super difficult.
 I don&#8217;t think our use case is strong enough for that.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Thanks.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D">Jeffrey<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;mso-bidi-font-size:1=
1.0pt;mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-=
font-family:&quot;Times New Roman&quot;;color:#1F497D"><o:p>&nbsp;</o:p></s=
pan></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<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"mso-fareast-font-family:&quot;Time=
s New Roman&quot;">From:</span></b><span style=3D"mso-fareast-font-family:&=
quot;Times New Roman&quot;"> Xiejingrong &lt;xiejingrong@huawei.com&gt;
<br>
<b>Sent:</b> Sunday, December 16, 2018 11:02 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;zzhang@juniper.net&gt;; stephane.lit=
kowski@orange.com; bess@ietf.org<br>
<b>Subject:</b> RE: Poll for early allocation request for draft-ietf-bess-m=
vpn-evpn-aggregation-label<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;color:#1F497D">Hi Je=
ffrey,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Thank=
s for clarifying that there is nothing special on data-plane comparing to t=
he Upstream-assigned label following a P2MP label as mentioned in RFC6513. =
It help me much.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">About=
 the case (maybe the worst case) when it is difficult to allocate a 'domain=
-wide unique' DCB-context-label,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">do yo=
u think it helpful for an allocation of &#8216;reserved&#8217; label (value=
 from 0 to 15) to represent a &#8216;Context-label&#8217; to make the inter=
operability mandatory ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#1F497D">Jingr=
ong<o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<pre style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6=
pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>=
&nbsp;</o:p></span></pre>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_DM6PR05MB5036A6CA3857FA4B44655F19D4BC0DM6PR05MB5036namp_--


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Date: Mon, 17 Dec 2018 11:48:18 -0800
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Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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--000000000000dfeaa5057d3d10f1
Content-Type: text/plain; charset="UTF-8"

Hi,

Very solid and understandable. Couple of minor comments [NM]:

Section 2.1: Layer-2 devices are particularly susceptible to
forwarding loops because of the broadcast nature of the Ethernet
traffic.

[NM]: better to refer to "Layer-2 services" instead of "Layer-2
devices" as the CE or PE devices themselves may be layer-3 capable.

Section 4.2: Note that while the DF election algorithm in [RFC7432]
uses PE address and vlan as inputs, this document uses Ethernet Tag,
PE address and ESI as inputs.

[NM]: I think the text in this context uses "vlan" and "Ethernet Tag"
interchangeably. Since the above is trying to emphasize the use of
"ESI" in this document as the key differentiation, clearer to have
other two variables (vlan and PE address) read the same, or else it
makes you wonder if there is a difference between vlan and ethernet
tag in this context.


Thanks,

Neeraj


On Tue, Dec 4, 2018 at 4:59 PM The IESG <iesg-secretary@ietf.org> wrote:

>
> The IESG has received a request from the BGP Enabled ServiceS WG (bess) to
> consider the following document: - 'Framework for EVPN Designated Forwarder
> Election Extensibility'
>   <draft-ietf-bess-evpn-df-election-framework-06.txt> as Proposed Standard
>
> 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
> ietf@ietf.org mailing lists by 2018-12-18. 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 Designated Forwarder (DF) in EVPN networks is the Provider Edge
>    (PE) router responsible for sending broadcast, unknown unicast and
>    multicast (BUM) traffic to a multi-homed Customer Equipment (CE)
>    device, on a given VLAN on a particular Ethernet Segment (ES). The DF
>    is selected out of a list of candidate PEs that advertise the same
>    Ethernet Segment Identifier (ESI) to the EVPN network. By default,
>    EVPN uses a DF Election algorithm referred to as "Service Carving"
>    and it is based on a modulus function (V mod N) that takes the number
>    of PEs in the ES (N) and the VLAN value (V) as input. This default DF
>    Election algorithm has some inefficiencies that this document
>    addresses by defining a new DF Election algorithm and a capability to
>    influence the DF Election result for a VLAN, depending on the state
>    of the associated Attachment Circuit (AC). In addition, this document
>    creates a registry with IANA, for future DF Election Algorithms and
>    Capabilities. It also presents a formal definition and clarification
>    of the DF Election Finite State Machine.
>
>
>
>
>
> The file can be obtained via
>
> https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/
>
> IESG discussion can be tracked via
>
> https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/ballot/
>
>
> No IPR declarations have been submitted directly on this I-D.
>
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--000000000000dfeaa5057d3d10f1
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><br><div><div dir=3D"ltr"><span style=3D"=
font-family:Courier;font-size:10pt;color:rgb(0,0,0)">Hi,</span><br></div><d=
iv dir=3D"ltr"><div class=3D"gmail-page" title=3D"Page 5" style=3D"color:rg=
b(0,0,0);font-family:-webkit-standard"><div class=3D"gmail-section"><div cl=
ass=3D"gmail-layoutArea"><div class=3D"gmail-column"><pre><span style=3D"fo=
nt-size:10pt;font-family:Courier">Very solid and understandable. Couple of =
minor comments [NM]:</span></pre><pre><span style=3D"font-size:10pt;font-fa=
mily:Courier">Section 2.1: </span><span style=3D"font-family:Courier;font-s=
ize:10pt">Layer-2 devices are particularly susceptible to forwarding loops =
because of the broadcast nature of the Ethernet traffic.</span></pre><pre>[=
NM]: better to refer to &quot;Layer-2 services&quot; instead of &quot;Layer=
-2 devices&quot; as the CE or PE devices themselves may be layer-3 capable.=
</pre><pre><div class=3D"gmail-page" title=3D"Page 17" style=3D"font-family=
:-webkit-standard;white-space:normal"><div class=3D"gmail-section"><div cla=
ss=3D"gmail-layoutArea"><div class=3D"gmail-column"><pre><span style=3D"fon=
t-size:10pt;font-family:Courier">Section 4.2: </span><span style=3D"white-s=
pace:normal;font-size:10pt;font-family:Courier">Note that while the DF elec=
tion algorithm in [</span><span style=3D"white-space:normal;font-size:10pt;=
font-family:Courier;color:rgb(0,0,255)">RFC7432</span><span style=3D"white-=
space:normal;font-size:10pt;font-family:Courier">] uses PE=C2=A0</span><spa=
n style=3D"font-family:Courier;font-size:10pt;white-space:normal">address a=
nd vlan as inputs, this document uses Ethernet Tag, PE=C2=A0</span><span st=
yle=3D"font-family:Courier;font-size:10pt;white-space:normal">address and E=
SI as inputs.</span></pre></div></div></div></div></pre><pre><span style=3D=
"font-size:10pt;font-family:Courier">[NM]: I think the text in this context=
 uses &quot;vlan&quot; and &quot;Ethernet Tag&quot; interchangeably. Since =
the above is trying to emphasize the use of &quot;ESI&quot; in this documen=
t as the key differentiation, clearer to have other two variables (vlan and=
 PE address) read the same, or else it makes you wonder if there is a diffe=
rence between vlan and ethernet tag in this context.</span></pre><pre><span=
 style=3D"font-size:10pt;font-family:Courier"><br></span></pre><pre><span s=
tyle=3D"font-size:10pt;font-family:Courier">Thanks,</span></pre><pre><span =
style=3D"font-size:10pt;font-family:Courier">Neeraj</span></pre></div></div=
></div></div></div></div></div></div><br><div class=3D"gmail_quote"><div di=
r=3D"ltr">On Tue, Dec 4, 2018 at 4:59 PM The IESG &lt;<a href=3D"mailto:ies=
g-secretary@ietf.org">iesg-secretary@ietf.org</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-=
width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);paddin=
g-left:1ex"><br>
The IESG has received a request from the BGP Enabled ServiceS WG (bess) to<=
br>
consider the following document: - &#39;Framework for EVPN Designated Forwa=
rder<br>
Election Extensibility&#39;<br>
=C2=A0 &lt;draft-ietf-bess-evpn-df-election-framework-06.txt&gt; as Propose=
d Standard<br>
<br>
The IESG plans to make a decision in the next few weeks, and solicits final=
<br>
comments on this action. Please send substantive comments to the<br>
<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a> mailin=
g lists by 2018-12-18. Exceptionally, comments may be<br>
sent to <a href=3D"mailto:iesg@ietf.org" target=3D"_blank">iesg@ietf.org</a=
> instead. In either case, please retain the beginning of<br>
the Subject line to allow automated sorting.<br>
<br>
Abstract<br>
<br>
<br>
=C2=A0 =C2=A0The Designated Forwarder (DF) in EVPN networks is the Provider=
 Edge<br>
=C2=A0 =C2=A0(PE) router responsible for sending broadcast, unknown unicast=
 and<br>
=C2=A0 =C2=A0multicast (BUM) traffic to a multi-homed Customer Equipment (C=
E)<br>
=C2=A0 =C2=A0device, on a given VLAN on a particular Ethernet Segment (ES).=
 The DF<br>
=C2=A0 =C2=A0is selected out of a list of candidate PEs that advertise the =
same<br>
=C2=A0 =C2=A0Ethernet Segment Identifier (ESI) to the EVPN network. By defa=
ult,<br>
=C2=A0 =C2=A0EVPN uses a DF Election algorithm referred to as &quot;Service=
 Carving&quot;<br>
=C2=A0 =C2=A0and it is based on a modulus function (V mod N) that takes the=
 number<br>
=C2=A0 =C2=A0of PEs in the ES (N) and the VLAN value (V) as input. This def=
ault DF<br>
=C2=A0 =C2=A0Election algorithm has some inefficiencies that this document<=
br>
=C2=A0 =C2=A0addresses by defining a new DF Election algorithm and a capabi=
lity to<br>
=C2=A0 =C2=A0influence the DF Election result for a VLAN, depending on the =
state<br>
=C2=A0 =C2=A0of the associated Attachment Circuit (AC). In addition, this d=
ocument<br>
=C2=A0 =C2=A0creates a registry with IANA, for future DF Election Algorithm=
s and<br>
=C2=A0 =C2=A0Capabilities. It also presents a formal definition and clarifi=
cation<br>
=C2=A0 =C2=A0of the DF Election Finite State Machine.<br>
<br>
<br>
<br>
<br>
<br>
The file can be obtained via<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-electio=
n-framework/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf=
.org/doc/draft-ietf-bess-evpn-df-election-framework/</a><br>
<br>
IESG discussion can be tracked via<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-electio=
n-framework/ballot/" rel=3D"noreferrer" target=3D"_blank">https://datatrack=
er.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/ballot/</a><br>
<br>
<br>
No IPR declarations have been submitted directly on this I-D.<br>
<br>
<br>
<br>
<br>
_______________________________________________<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>

--000000000000dfeaa5057d3d10f1--


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Subject: [bess] I-D Action: draft-ietf-bess-mvpn-evpn-aggregation-label-02.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           : MVPN/EVPN Tunnel Aggregation with Common Labels
        Authors         : Zhaohui Zhang
                          Eric Rosen
                          Wen Lin
                          Zhenbin Li
                          IJsbrand Wijnands
	Filename        : draft-ietf-bess-mvpn-evpn-aggregation-label-02.txt
	Pages           : 14
	Date            : 2018-12-18

Abstract:
   The MVPN specifications allow a single Point-to-Multipoint (P2MP)
   tunnel to carry traffic of multiple VPNs.  The EVPN specifications
   allow a single P2MP tunnel to carry traffic of multiple Broadcast
   Domains (BDs).  These features require the ingress router of the P2MP
   tunnel to allocate an upstream-assigned MPLS label for each VPN or
   for each BD.  A packet sent on a P2MP tunnel then carries the label
   that is mapped to its VPN or BD.  (In some cases, a distinct
   upstream-assigned is needed for each flow.)  Since each ingress
   router allocates labels independently, with no coordination among the
   ingress routers, the egress routers may need to keep track of a large
   number of labels.  The number of labels may need to be as large (or
   larger) than the product of the number of ingress routers times the
   number of VPNs or BDs.  However, the number of labels can be greatly
   reduced if the association between a label and a VPN or BD is made by
   provisioning, so that all ingress routers assign the same label to a
   particular VPN or BD.  New procedures are needed in order to take
   advantage of such provisioned labels.  These new procedures also
   apply to Multipoint-to-Multipoint (MP2MP) tunnels.  This document
   updates RFCs 6514, 7432 and 7582 by specifying the necessary
   procedures.



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

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-mvpn-evpn-aggregation-label-02
https://datatracker.ietf.org/doc/html/draft-ietf-bess-mvpn-evpn-aggregation-label-02

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-mvpn-evpn-aggregation-label-02


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: Neeraj Malhotra <neeraj.ietf@gmail.com>
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Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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--00000000000021b61f057d4f4914
Content-Type: text/plain; charset="UTF-8"

Hi,

Very solid and understandable. Couple of minor comments [NM]:

Section 2.1: Layer-2 devices are particularly susceptible to
forwarding loops because of the broadcast nature of the Ethernet
traffic.

[NM]: better to refer to "Layer-2 services" instead of "Layer-2
devices" as the CE or PE devices themselves may be layer-3 capable.

Section 4.2: Note that while the DF election algorithm in [RFC7432]
uses PE address and vlan as inputs, this document uses Ethernet Tag,
PE address and ESI as inputs.

[NM]: I think the text in this context uses "vlan" and "Ethernet Tag"
interchangeably. Since the above is trying to emphasize the use of
"ESI" in this document as the key differentiation, clearer to have
other two variables (vlan and PE address) read the same, or else it
makes you wonder if there is a difference between vlan and ethernet
tag in this context.

Thanks,

Neeraj


On Tue, Dec 4, 2018 at 4:59 PM The IESG <iesg-secretary@ietf.org> wrote:

>
> The IESG has received a request from the BGP Enabled ServiceS WG (bess) to
> consider the following document: - 'Framework for EVPN Designated Forwarder
> Election Extensibility'
>   <draft-ietf-bess-evpn-df-election-framework-06.txt> as Proposed Standard
>
> 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
> ietf@ietf.org mailing lists by 2018-12-18. 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 Designated Forwarder (DF) in EVPN networks is the Provider Edge
>    (PE) router responsible for sending broadcast, unknown unicast and
>    multicast (BUM) traffic to a multi-homed Customer Equipment (CE)
>    device, on a given VLAN on a particular Ethernet Segment (ES). The DF
>    is selected out of a list of candidate PEs that advertise the same
>    Ethernet Segment Identifier (ESI) to the EVPN network. By default,
>    EVPN uses a DF Election algorithm referred to as "Service Carving"
>    and it is based on a modulus function (V mod N) that takes the number
>    of PEs in the ES (N) and the VLAN value (V) as input. This default DF
>    Election algorithm has some inefficiencies that this document
>    addresses by defining a new DF Election algorithm and a capability to
>    influence the DF Election result for a VLAN, depending on the state
>    of the associated Attachment Circuit (AC). In addition, this document
>    creates a registry with IANA, for future DF Election Algorithms and
>    Capabilities. It also presents a formal definition and clarification
>    of the DF Election Finite State Machine.
>
>
>
>
>
> The file can be obtained via
>
> https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/
>
> IESG discussion can be tracked via
>
> https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/ballot/
>
>
> No IPR declarations have been submitted directly on this I-D.
>
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--00000000000021b61f057d4f4914
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><font face=3D"arial, helvetica, sans-seri=
f"><br></font><div><div dir=3D"ltr"><font face=3D"arial, helvetica, sans-se=
rif"><span style=3D"font-size:10pt;color:rgb(0,0,0)">Hi,</span><br></font><=
/div><div dir=3D"ltr"><div class=3D"gmail-m_-8037361501764207882gmail-page"=
 title=3D"Page 5" style=3D"color:rgb(0,0,0)"><div class=3D"gmail-m_-8037361=
501764207882gmail-section"><div class=3D"gmail-m_-8037361501764207882gmail-=
layoutArea"><div class=3D"gmail-m_-8037361501764207882gmail-column"><pre st=
yle=3D"white-space:pre-wrap"><span style=3D"font-size:10pt"><font face=3D"a=
rial, helvetica, sans-serif">Very solid and understandable. Couple of minor=
 comments [NM]:</font></span></pre><pre style=3D"white-space:pre-wrap"><fon=
t face=3D"arial, helvetica, sans-serif"><span style=3D"font-size:10pt">Sect=
ion 2.1: </span><span style=3D"font-size:10pt">Layer-2 devices are particul=
arly susceptible to forwarding loops because of the broadcast nature of the=
 Ethernet traffic.</span></font></pre><pre style=3D"white-space:pre-wrap"><=
font face=3D"arial, helvetica, sans-serif">[NM]: better to refer to &quot;L=
ayer-2 services&quot; instead of &quot;Layer-2 devices&quot; as the CE or P=
E devices themselves may be layer-3 capable.</font></pre><pre style=3D"whit=
e-space:pre-wrap"><div class=3D"gmail-m_-8037361501764207882gmail-page" tit=
le=3D"Page 17" style=3D"white-space:normal"><div class=3D"gmail-m_-80373615=
01764207882gmail-section"><div class=3D"gmail-m_-8037361501764207882gmail-l=
ayoutArea"><div class=3D"gmail-m_-8037361501764207882gmail-column"><pre sty=
le=3D"white-space:pre-wrap"><font face=3D"arial, helvetica, sans-serif"><sp=
an style=3D"font-size:10pt">Section 4.2: </span><span style=3D"white-space:=
normal;font-size:10pt">Note that while the DF election algorithm in [</span=
><span style=3D"white-space:normal;font-size:10pt;color:rgb(0,0,255)">RFC74=
32</span><span style=3D"white-space:normal;font-size:10pt">] uses PE=C2=A0<=
/span><span style=3D"font-size:10pt;white-space:normal">address and vlan as=
 inputs, this document uses Ethernet Tag, PE=C2=A0</span><span style=3D"fon=
t-size:10pt;white-space:normal">address and ESI as inputs.</span></font></p=
re></div></div></div></div></pre><pre style=3D"white-space:pre-wrap"><span =
style=3D"font-size:10pt"><font face=3D"arial, helvetica, sans-serif">[NM]: =
I think the text in this context uses &quot;vlan&quot; and &quot;Ethernet T=
ag&quot; interchangeably. Since the above is trying to emphasize the use of=
 &quot;ESI&quot; in this document as the key differentiation, clearer to ha=
ve other two variables (vlan and PE address) read the same, or else it make=
s you wonder if there is a difference between vlan and ethernet tag in this=
 context.</font></span></pre><pre style=3D"white-space:pre-wrap"><span styl=
e=3D"font-size:10pt"><font face=3D"arial, helvetica, sans-serif">Thanks,</f=
ont></span></pre><pre style=3D"white-space:pre-wrap"><span style=3D"font-si=
ze:10pt"><font face=3D"arial, helvetica, sans-serif">Neeraj</font></span></=
pre></div></div></div></div></div></div></div></div><br><div class=3D"gmail=
_quote"><div dir=3D"ltr">On Tue, Dec 4, 2018 at 4:59 PM The IESG &lt;<a hre=
f=3D"mailto:iesg-secretary@ietf.org">iesg-secretary@ietf.org</a>&gt; wrote:=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8=
ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,=
204,204);padding-left:1ex"><br>
The IESG has received a request from the BGP Enabled ServiceS WG (bess) to<=
br>
consider the following document: - &#39;Framework for EVPN Designated Forwa=
rder<br>
Election Extensibility&#39;<br>
=C2=A0 &lt;draft-ietf-bess-evpn-df-election-framework-06.txt&gt; as Propose=
d Standard<br>
<br>
The IESG plans to make a decision in the next few weeks, and solicits final=
<br>
comments on this action. Please send substantive comments to the<br>
<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a> mailin=
g lists by 2018-12-18. Exceptionally, comments may be<br>
sent to <a href=3D"mailto:iesg@ietf.org" target=3D"_blank">iesg@ietf.org</a=
> instead. In either case, please retain the beginning of<br>
the Subject line to allow automated sorting.<br>
<br>
Abstract<br>
<br>
<br>
=C2=A0 =C2=A0The Designated Forwarder (DF) in EVPN networks is the Provider=
 Edge<br>
=C2=A0 =C2=A0(PE) router responsible for sending broadcast, unknown unicast=
 and<br>
=C2=A0 =C2=A0multicast (BUM) traffic to a multi-homed Customer Equipment (C=
E)<br>
=C2=A0 =C2=A0device, on a given VLAN on a particular Ethernet Segment (ES).=
 The DF<br>
=C2=A0 =C2=A0is selected out of a list of candidate PEs that advertise the =
same<br>
=C2=A0 =C2=A0Ethernet Segment Identifier (ESI) to the EVPN network. By defa=
ult,<br>
=C2=A0 =C2=A0EVPN uses a DF Election algorithm referred to as &quot;Service=
 Carving&quot;<br>
=C2=A0 =C2=A0and it is based on a modulus function (V mod N) that takes the=
 number<br>
=C2=A0 =C2=A0of PEs in the ES (N) and the VLAN value (V) as input. This def=
ault DF<br>
=C2=A0 =C2=A0Election algorithm has some inefficiencies that this document<=
br>
=C2=A0 =C2=A0addresses by defining a new DF Election algorithm and a capabi=
lity to<br>
=C2=A0 =C2=A0influence the DF Election result for a VLAN, depending on the =
state<br>
=C2=A0 =C2=A0of the associated Attachment Circuit (AC). In addition, this d=
ocument<br>
=C2=A0 =C2=A0creates a registry with IANA, for future DF Election Algorithm=
s and<br>
=C2=A0 =C2=A0Capabilities. It also presents a formal definition and clarifi=
cation<br>
=C2=A0 =C2=A0of the DF Election Finite State Machine.<br>
<br>
<br>
<br>
<br>
<br>
The file can be obtained via<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-electio=
n-framework/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf=
.org/doc/draft-ietf-bess-evpn-df-election-framework/</a><br>
<br>
IESG discussion can be tracked via<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-electio=
n-framework/ballot/" rel=3D"noreferrer" target=3D"_blank">https://datatrack=
er.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/ballot/</a><br>
<br>
<br>
No IPR declarations have been submitted directly on this I-D.<br>
<br>
<br>
<br>
<br>
_______________________________________________<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>

--00000000000021b61f057d4f4914--


From nobody Tue Dec 18 10:08:42 2018
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From: Anoop Ghanwani <anoop@alumni.duke.edu>
Date: Tue, 18 Dec 2018 10:08:23 -0800
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: bess@ietf.org, rtg-bfd@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/SaQywwEJA3V-qscL0bZzF8JP3kw>
Subject: Re: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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I would change the introduction to the following to mention the use of
VXLAN by BGP EVPN.

Thanks,
Anoop

==

   "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348] provides
   an encapsulation scheme that allows building an overlay network by
   decoupling the address space of the attached virtual hosts from that
   of the network.

  One use of VXLAN is in data centers interconnecting
  VMs of a tenant.  VXLAN addresses requirements of the
   Layer 2 and Layer 3 data center network infrastructure in the
   presence of VMs in a multi-tenant environment, discussed in section 3
   of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
   Another use is as an encapsulation for EVPN [RFC 8365].

  In the remainder of this document the terms VM and End Station
  are used interchangeably.

   In the absence of a router in the overlay, a VM can communicate with
   another VM only if they are on the same VXLAN segment.  VMs are
   unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a VXLAN
   Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs (hypervisor/TOR) are
   responsible for encapsulating and decapsulating frames exchanged
   among VMs.

On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas <jhaas@pfrc.org> wrote:
>
> BESS Working Group members,
>
> https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04
>
> BFD has finished working group last call on BFD for Vxlan and is about ready
> to request publication as an RFC.  A last minute comment suggested that we
> should consider inviting comment from your working group for expertise.
>
> We will be leaving the last call open until December 21 to leave time for
> final comments.
>
> -- Jeff (for BFD)
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


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Thread-Topic: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-bum-procedure-updates
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-bum-procedure-updates
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 18 Dec 2018 20:16:59 +0000
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To: Anoop Ghanwani <anoop@alumni.duke.edu>
Cc: Jeffrey Haas <jhaas@pfrc.org>, rtg-bfd WG <rtg-bfd@ietf.org>, BESS <bess@ietf.org>
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Subject: Re: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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Hi Anoop,
thank you for your comments and the suggested text. To clarify the extent
of the update, would the following accurately reflect the change in
Introduction you're proposing:
OLD TEXT:
   VXLAN is typically deployed in data centers interconnecting
   virtualized hosts of a tenant.  VXLAN addresses requirements of the
   Layer 2 and Layer 3 data center network infrastructure in the
   presence of VMs in a multi-tenant environment, discussed in section 3
   [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
NEW TEXT:
  One use of VXLAN is in data centers interconnecting
  VMs of a tenant.  VXLAN addresses requirements of the
   Layer 2 and Layer 3 data center network infrastructure in the
   presence of VMs in a multi-tenant environment, discussed in section 3
   of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
   Another use is as an encapsulation for EVPN [RFC 8365].

  In the remainder of this document the terms VM and End Station
  are used interchangeably.

If my understanding of the proposed update is correct, I'd be glad to use
it (adding RFC 8365 as Informational reference).  Should note that in the
draft we never used "End Station". Perhaps the last sentence is not
required.

What do you think?

Regards,
Greg

On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani <anoop@alumni.duke.edu>
wrote:

> I would change the introduction to the following to mention the use of
> VXLAN by BGP EVPN.
>
> Thanks,
> Anoop
>
> ==
>
>    "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348] provides
>    an encapsulation scheme that allows building an overlay network by
>    decoupling the address space of the attached virtual hosts from that
>    of the network.
>
>   One use of VXLAN is in data centers interconnecting
>   VMs of a tenant.  VXLAN addresses requirements of the
>    Layer 2 and Layer 3 data center network infrastructure in the
>    presence of VMs in a multi-tenant environment, discussed in section 3
>    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
>    Another use is as an encapsulation for EVPN [RFC 8365].
>
>   In the remainder of this document the terms VM and End Station
>   are used interchangeably.
>
>    In the absence of a router in the overlay, a VM can communicate with
>    another VM only if they are on the same VXLAN segment.  VMs are
>    unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a VXLAN
>    Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs (hypervisor/TOR) are
>    responsible for encapsulating and decapsulating frames exchanged
>    among VMs.
>
> On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas <jhaas@pfrc.org> wrote:
> >
> > BESS Working Group members,
> >
> > https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04
> >
> > BFD has finished working group last call on BFD for Vxlan and is about
> ready
> > to request publication as an RFC.  A last minute comment suggested that
> we
> > should consider inviting comment from your working group for expertise.
> >
> > We will be leaving the last call open until December 21 to leave time for
> > final comments.
> >
> > -- Jeff (for BFD)
> >
> > _______________________________________________
> > BESS mailing list
> > BESS@ietf.org
> > https://www.ietf.org/mailman/listinfo/bess
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

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<div dir=3D"ltr"><div dir=3D"ltr">Hi Anoop,<div>thank you for your comments=
 and the suggested text. To clarify the extent of the update, would the fol=
lowing accurately reflect the change in Introduction you&#39;re proposing:<=
/div><div>OLD TEXT:</div><div><div>=C2=A0 =C2=A0VXLAN is typically deployed=
 in data centers interconnecting</div><div>=C2=A0 =C2=A0virtualized hosts o=
f a tenant.=C2=A0 VXLAN addresses requirements of the</div><div>=C2=A0 =C2=
=A0Layer 2 and Layer 3 data center network infrastructure in the</div><div>=
=C2=A0 =C2=A0presence of VMs in a multi-tenant environment, discussed in se=
ction 3</div><div>=C2=A0 =C2=A0[RFC7348], by providing Layer 2 overlay sche=
me on a Layer 3 network.</div></div><div>NEW TEXT:</div><div>=C2=A0 One use=
 of VXLAN is in data centers interconnecting<br>=C2=A0 VMs of a tenant.=C2=
=A0 VXLAN addresses requirements of the<br>=C2=A0 =C2=A0Layer 2 and Layer 3=
 data center network infrastructure in the<br>=C2=A0 =C2=A0presence of VMs =
in a multi-tenant environment, discussed in section 3<br>=C2=A0 =C2=A0of [R=
FC7348], by providing Layer 2 overlay scheme on a Layer 3 network.<br>=C2=
=A0 =C2=A0Another use is as an encapsulation for EVPN [RFC 8365].<br><br>=
=C2=A0 In the remainder of this document the terms VM and End Station<br>=
=C2=A0 are used interchangeably.=C2=A0</div><div><br></div><div>If my under=
standing of the proposed update is correct, I&#39;d be glad to use it (addi=
ng RFC 8365 as Informational reference).=C2=A0 Should note that in the draf=
t=C2=A0we never=C2=A0used &quot;End Station&quot;. Perhaps the last sentenc=
e is not required.<br></div><div><br></div><div>What do you think?</div><di=
v><br></div><div>Regards,</div><div>Greg</div></div></div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr">On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanw=
ani &lt;<a href=3D"mailto:anoop@alumni.duke.edu">anoop@alumni.duke.edu</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">I wou=
ld change the introduction to the following to mention the use of<br>
VXLAN by BGP EVPN.<br>
<br>
Thanks,<br>
Anoop<br>
<br>
=3D=3D<br>
<br>
=C2=A0 =C2=A0&quot;Virtual eXtensible Local Area Network&quot; (VXLAN) [RFC=
7348] provides<br>
=C2=A0 =C2=A0an encapsulation scheme that allows building an overlay networ=
k by<br>
=C2=A0 =C2=A0decoupling the address space of the attached virtual hosts fro=
m that<br>
=C2=A0 =C2=A0of the network.<br>
<br>
=C2=A0 One use of VXLAN is in data centers interconnecting<br>
=C2=A0 VMs of a tenant.=C2=A0 VXLAN addresses requirements of the<br>
=C2=A0 =C2=A0Layer 2 and Layer 3 data center network infrastructure in the<=
br>
=C2=A0 =C2=A0presence of VMs in a multi-tenant environment, discussed in se=
ction 3<br>
=C2=A0 =C2=A0of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3=
 network.<br>
=C2=A0 =C2=A0Another use is as an encapsulation for EVPN [RFC 8365].<br>
<br>
=C2=A0 In the remainder of this document the terms VM and End Station<br>
=C2=A0 are used interchangeably.<br>
<br>
=C2=A0 =C2=A0In the absence of a router in the overlay, a VM can communicat=
e with<br>
=C2=A0 =C2=A0another VM only if they are on the same VXLAN segment.=C2=A0 V=
Ms are<br>
=C2=A0 =C2=A0unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a =
VXLAN<br>
=C2=A0 =C2=A0Tunnel End Point (VTEP) (hypervisor/TOR).=C2=A0 VTEPs (hypervi=
sor/TOR) are<br>
=C2=A0 =C2=A0responsible for encapsulating and decapsulating frames exchang=
ed<br>
=C2=A0 =C2=A0among VMs.<br>
<br>
On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pf=
rc.org" target=3D"_blank">jhaas@pfrc.org</a>&gt; wrote:<br>
&gt;<br>
&gt; BESS Working Group members,<br>
&gt;<br>
&gt; <a href=3D"https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04" rel=3D=
"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-bfd-v=
xlan-04</a><br>
&gt;<br>
&gt; BFD has finished working group last call on BFD for Vxlan and is about=
 ready<br>
&gt; to request publication as an RFC.=C2=A0 A last minute comment suggeste=
d that we<br>
&gt; should consider inviting comment from your working group for expertise=
.<br>
&gt;<br>
&gt; We will be leaving the last call open until December 21 to leave time =
for<br>
&gt; final comments.<br>
&gt;<br>
&gt; -- Jeff (for BFD)<br>
&gt;<br>
&gt; _______________________________________________<br>
&gt; BESS mailing list<br>
&gt; <a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferr=
er" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
<br>
_______________________________________________<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>

--0000000000001479d5057d5195d6--


From nobody Tue Dec 18 15:26:17 2018
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From: Linda Dunbar <ldunbar@huawei.com>
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Cc: draft-ietf-bess-evpn-vpls-seamless-integ.all@ietf.org, ietf@ietf.org, bess@ietf.org
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Subject: [bess] Opsdir last call review of draft-ietf-bess-evpn-vpls-seamless-integ-05
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Reviewer: Linda Dunbar
Review result: Ready

Reviewer: Linda Dunbar
Review result: Ready with comments

I have reviewed this document as part of the Operational directorate's
ongoing effort to review all IETF documents being processed by the IESG.  These
comments were written with the intent of improving the operational aspects of
the IETF drafts. Comments that are not addressed in last call may be included
in AD reviews during the IESG review.  Document editors and WG chairs should
treat these comments just like any other last call comments.

The draft describes the procedures for EVPN PEs to handle traffic from VPLS
PEs, to enable smooth transition from VPLS network to EVPN network. The
procedures are written very clear, (although I am not sure why it is a Standard
Track document as the document is mainly in describing the procedures of PEs
that support both EVPN & VPLS).

Question to the authors:

Page 8 Section 3.2: why set up the PW if keep it operationally down?

Best Regards,
Linda Dunbar


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From: Anoop Ghanwani <anoop@alumni.duke.edu>
Date: Tue, 18 Dec 2018 22:53:54 -0800
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Subject: Re: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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Hi Greg,

Yes this captures what I was trying to get added.

Perhaps the last sentence can be changed to:

"This document is written assuming the use of VXLAN for virtualized
hosts and refers to VMs and VTEPs in hypervisors.  However, the
concepts are equally applicable to non-virtualized hosts attached to
VTEPs in switches."

Thanks,
Anoop

On Tue, Dec 18, 2018 at 12:17 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
> Hi Anoop,
> thank you for your comments and the suggested text. To clarify the extent of the update, would the following accurately reflect the change in Introduction you're proposing:
> OLD TEXT:
>    VXLAN is typically deployed in data centers interconnecting
>    virtualized hosts of a tenant.  VXLAN addresses requirements of the
>    Layer 2 and Layer 3 data center network infrastructure in the
>    presence of VMs in a multi-tenant environment, discussed in section 3
>    [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
> NEW TEXT:
>   One use of VXLAN is in data centers interconnecting
>   VMs of a tenant.  VXLAN addresses requirements of the
>    Layer 2 and Layer 3 data center network infrastructure in the
>    presence of VMs in a multi-tenant environment, discussed in section 3
>    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
>    Another use is as an encapsulation for EVPN [RFC 8365].
>
>   In the remainder of this document the terms VM and End Station
>   are used interchangeably.
>
> If my understanding of the proposed update is correct, I'd be glad to use it (adding RFC 8365 as Informational reference).  Should note that in the draft we never used "End Station". Perhaps the last sentence is not required.
>
> What do you think?
>
> Regards,
> Greg
>
> On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani <anoop@alumni.duke.edu> wrote:
>>
>> I would change the introduction to the following to mention the use of
>> VXLAN by BGP EVPN.
>>
>> Thanks,
>> Anoop
>>
>> ==
>>
>>    "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348] provides
>>    an encapsulation scheme that allows building an overlay network by
>>    decoupling the address space of the attached virtual hosts from that
>>    of the network.
>>
>>   One use of VXLAN is in data centers interconnecting
>>   VMs of a tenant.  VXLAN addresses requirements of the
>>    Layer 2 and Layer 3 data center network infrastructure in the
>>    presence of VMs in a multi-tenant environment, discussed in section 3
>>    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 network.
>>    Another use is as an encapsulation for EVPN [RFC 8365].
>>
>>   In the remainder of this document the terms VM and End Station
>>   are used interchangeably.
>>
>>    In the absence of a router in the overlay, a VM can communicate with
>>    another VM only if they are on the same VXLAN segment.  VMs are
>>    unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a VXLAN
>>    Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs (hypervisor/TOR) are
>>    responsible for encapsulating and decapsulating frames exchanged
>>    among VMs.
>>
>> On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas <jhaas@pfrc.org> wrote:
>> >
>> > BESS Working Group members,
>> >
>> > https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04
>> >
>> > BFD has finished working group last call on BFD for Vxlan and is about ready
>> > to request publication as an RFC.  A last minute comment suggested that we
>> > should consider inviting comment from your working group for expertise.
>> >
>> > We will be leaving the last call open until December 21 to leave time for
>> > final comments.
>> >
>> > -- Jeff (for BFD)
>> >
>> > _______________________________________________
>> > BESS mailing list
>> > BESS@ietf.org
>> > https://www.ietf.org/mailman/listinfo/bess
>>
>> _______________________________________________
>> BESS mailing list
>> BESS@ietf.org
>> https://www.ietf.org/mailman/listinfo/bess


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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "Satya Mohanty   (satyamoh)" <satyamoh@cisco.com>, Anoop Ghanwani <anoop@alumni.duke.edu>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "'Satya Mohanty (satyamoh)'" <satyamoh@cisco.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-df-election-framework.all@ietf.org" <draft-ietf-bess-evpn-df-election-framework.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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Date: Wed, 19 Dec 2018 09:41:51 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/-2J5YDHM12Gx4oime6oEW9RF3aw>
Subject: Re: [bess] Rtgdir last call review of draft-ietf-bess-evpn-df-election-framework-06
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: Francesca Palombini <francesca.palombini@ericsson.com>, "gen-art@ietf.org" <gen-art@ietf.org>
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Subject: Re: [bess] Genart last call review of draft-ietf-bess-evpn-df-election-framework-06
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From: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>
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Thread-Topic: REMINDER: Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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Subject: [bess] REMINDER: Wg Adoption and IPR poll for draft-liu-bess-mvpn-yang-07
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: John E Drake <jdrake@juniper.net>, Neeraj Malhotra <neeraj.ietf@gmail.com>
CC: "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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Date: Wed, 19 Dec 2018 12:19:46 +0000
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From: "Reshad Rahman (rrahman)" <rrahman@cisco.com>
To: Anoop Ghanwani <anoop@alumni.duke.edu>, Greg Mirsky <gregimirsky@gmail.com>
CC: rtg-bfd WG <rtg-bfd@ietf.org>, BESS <bess@ietf.org>
Thread-Topic: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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Subject: Re: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 19 Dec 2018 06:28:40 -0800
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To: "Reshad Rahman (rrahman)" <rrahman@cisco.com>
Cc: Anoop Ghanwani <anoop@alumni.duke.edu>, rtg-bfd WG <rtg-bfd@ietf.org>, BESS <bess@ietf.org>
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Subject: Re: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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Hi Anoop,
thank you for the great text you've contributed. Accepted. I'll update the
working text and publish later today.

Kind regards,
Greg

On Wed, Dec 19, 2018 at 5:19 AM Reshad Rahman (rrahman) <rrahman@cisco.com>
wrote:

> +1 to Anoop's comments. I've made similar comment to Greg privately, and
> Anoop's proposed text clears things up.
>
> Regards,
> Reshad (no hat).
>
> =EF=BB=BFOn 2018-12-19, 1:54 AM, "Rtg-bfd on behalf of Anoop Ghanwani" <
> rtg-bfd-bounces@ietf.org on behalf of anoop@alumni.duke.edu> wrote:
>
>     Hi Greg,
>
>     Yes this captures what I was trying to get added.
>
>     Perhaps the last sentence can be changed to:
>
>     "This document is written assuming the use of VXLAN for virtualized
>     hosts and refers to VMs and VTEPs in hypervisors.  However, the
>     concepts are equally applicable to non-virtualized hosts attached to
>     VTEPs in switches."
>
>     Thanks,
>     Anoop
>
>     On Tue, Dec 18, 2018 at 12:17 PM Greg Mirsky <gregimirsky@gmail.com>
> wrote:
>     >
>     > Hi Anoop,
>     > thank you for your comments and the suggested text. To clarify the
> extent of the update, would the following accurately reflect the change i=
n
> Introduction you're proposing:
>     > OLD TEXT:
>     >    VXLAN is typically deployed in data centers interconnecting
>     >    virtualized hosts of a tenant.  VXLAN addresses requirements of
> the
>     >    Layer 2 and Layer 3 data center network infrastructure in the
>     >    presence of VMs in a multi-tenant environment, discussed in
> section 3
>     >    [RFC7348], by providing Layer 2 overlay scheme on a Layer 3
> network.
>     > NEW TEXT:
>     >   One use of VXLAN is in data centers interconnecting
>     >   VMs of a tenant.  VXLAN addresses requirements of the
>     >    Layer 2 and Layer 3 data center network infrastructure in the
>     >    presence of VMs in a multi-tenant environment, discussed in
> section 3
>     >    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3
> network.
>     >    Another use is as an encapsulation for EVPN [RFC 8365].
>     >
>     >   In the remainder of this document the terms VM and End Station
>     >   are used interchangeably.
>     >
>     > If my understanding of the proposed update is correct, I'd be glad
> to use it (adding RFC 8365 as Informational reference).  Should note that
> in the draft we never used "End Station". Perhaps the last sentence is no=
t
> required.
>     >
>     > What do you think?
>     >
>     > Regards,
>     > Greg
>     >
>     > On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani <
> anoop@alumni.duke.edu> wrote:
>     >>
>     >> I would change the introduction to the following to mention the us=
e
> of
>     >> VXLAN by BGP EVPN.
>     >>
>     >> Thanks,
>     >> Anoop
>     >>
>     >> =3D=3D
>     >>
>     >>    "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348]
> provides
>     >>    an encapsulation scheme that allows building an overlay network
> by
>     >>    decoupling the address space of the attached virtual hosts from
> that
>     >>    of the network.
>     >>
>     >>   One use of VXLAN is in data centers interconnecting
>     >>   VMs of a tenant.  VXLAN addresses requirements of the
>     >>    Layer 2 and Layer 3 data center network infrastructure in the
>     >>    presence of VMs in a multi-tenant environment, discussed in
> section 3
>     >>    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3
> network.
>     >>    Another use is as an encapsulation for EVPN [RFC 8365].
>     >>
>     >>   In the remainder of this document the terms VM and End Station
>     >>   are used interchangeably.
>     >>
>     >>    In the absence of a router in the overlay, a VM can communicate
> with
>     >>    another VM only if they are on the same VXLAN segment.  VMs are
>     >>    unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a
> VXLAN
>     >>    Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs
> (hypervisor/TOR) are
>     >>    responsible for encapsulating and decapsulating frames exchange=
d
>     >>    among VMs.
>     >>
>     >> On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas <jhaas@pfrc.org>
> wrote:
>     >> >
>     >> > BESS Working Group members,
>     >> >
>     >> > https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04
>     >> >
>     >> > BFD has finished working group last call on BFD for Vxlan and is
> about ready
>     >> > to request publication as an RFC.  A last minute comment
> suggested that we
>     >> > should consider inviting comment from your working group for
> expertise.
>     >> >
>     >> > We will be leaving the last call open until December 21 to leave
> time for
>     >> > final comments.
>     >> >
>     >> > -- Jeff (for BFD)
>     >> >
>     >> > _______________________________________________
>     >> > BESS mailing list
>     >> > BESS@ietf.org
>     >> > https://www.ietf.org/mailman/listinfo/bess
>     >>
>     >> _______________________________________________
>     >> BESS mailing list
>     >> BESS@ietf.org
>     >> https://www.ietf.org/mailman/listinfo/bess
>
>
>
>

--0000000000004c656e057d60d51a
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Anoop,<div>thank you for the great text you&#39;ve cont=
ributed. Accepted. I&#39;ll update the working text and publish later today=
.</div><div><br></div><div>Kind regards,</div><div>Greg</div></div><br><div=
 class=3D"gmail_quote"><div dir=3D"ltr">On Wed, Dec 19, 2018 at 5:19 AM Res=
had Rahman (rrahman) &lt;<a href=3D"mailto:rrahman@cisco.com">rrahman@cisco=
.com</a>&gt; wrote:<br></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">+1 to Anoop&#39;s comments. I&#39;ve made similar comment to Greg priva=
tely, and Anoop&#39;s proposed text clears things up.<br>
<br>
Regards,<br>
Reshad (no hat).<br>
<br>
=EF=BB=BFOn 2018-12-19, 1:54 AM, &quot;Rtg-bfd on behalf of Anoop Ghanwani&=
quot; &lt;<a href=3D"mailto:rtg-bfd-bounces@ietf.org" target=3D"_blank">rtg=
-bfd-bounces@ietf.org</a> on behalf of <a href=3D"mailto:anoop@alumni.duke.=
edu" target=3D"_blank">anoop@alumni.duke.edu</a>&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 Hi Greg,<br>
<br>
=C2=A0 =C2=A0 Yes this captures what I was trying to get added.<br>
<br>
=C2=A0 =C2=A0 Perhaps the last sentence can be changed to:<br>
<br>
=C2=A0 =C2=A0 &quot;This document is written assuming the use of VXLAN for =
virtualized<br>
=C2=A0 =C2=A0 hosts and refers to VMs and VTEPs in hypervisors.=C2=A0 Howev=
er, the<br>
=C2=A0 =C2=A0 concepts are equally applicable to non-virtualized hosts atta=
ched to<br>
=C2=A0 =C2=A0 VTEPs in switches.&quot;<br>
<br>
=C2=A0 =C2=A0 Thanks,<br>
=C2=A0 =C2=A0 Anoop<br>
<br>
=C2=A0 =C2=A0 On Tue, Dec 18, 2018 at 12:17 PM Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
; wrote:<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; Hi Anoop,<br>
=C2=A0 =C2=A0 &gt; thank you for your comments and the suggested text. To c=
larify the extent of the update, would the following accurately reflect the=
 change in Introduction you&#39;re proposing:<br>
=C2=A0 =C2=A0 &gt; OLD TEXT:<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 VXLAN is typically deployed in data centers=
 interconnecting<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 virtualized hosts of a tenant.=C2=A0 VXLAN =
addresses requirements of the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 Layer 2 and Layer 3 data center network inf=
rastructure in the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 presence of VMs in a multi-tenant environme=
nt, discussed in section 3<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 [RFC7348], by providing Layer 2 overlay sch=
eme on a Layer 3 network.<br>
=C2=A0 =C2=A0 &gt; NEW TEXT:<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0One use of VXLAN is in data centers intercon=
necting<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0VMs of a tenant.=C2=A0 VXLAN addresses requi=
rements of the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 Layer 2 and Layer 3 data center network inf=
rastructure in the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 presence of VMs in a multi-tenant environme=
nt, discussed in section 3<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 of [RFC7348], by providing Layer 2 overlay =
scheme on a Layer 3 network.<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 Another use is as an encapsulation for EVPN=
 [RFC 8365].<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0In the remainder of this document the terms =
VM and End Station<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0are used interchangeably.<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; If my understanding of the proposed update is correct, I=
&#39;d be glad to use it (adding RFC 8365 as Informational reference).=C2=
=A0 Should note that in the draft we never used &quot;End Station&quot;. Pe=
rhaps the last sentence is not required.<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; What do you think?<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; Regards,<br>
=C2=A0 =C2=A0 &gt; Greg<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani &lt;<a h=
ref=3D"mailto:anoop@alumni.duke.edu" target=3D"_blank">anoop@alumni.duke.ed=
u</a>&gt; wrote:<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; I would change the introduction to the following to =
mention the use of<br>
=C2=A0 =C2=A0 &gt;&gt; VXLAN by BGP EVPN.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; Thanks,<br>
=C2=A0 =C2=A0 &gt;&gt; Anoop<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; =3D=3D<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 &quot;Virtual eXtensible Local Area Net=
work&quot; (VXLAN) [RFC7348] provides<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 an encapsulation scheme that allows bui=
lding an overlay network by<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 decoupling the address space of the att=
ached virtual hosts from that<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 of the network.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0One use of VXLAN is in data centers inte=
rconnecting<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0VMs of a tenant.=C2=A0 VXLAN addresses r=
equirements of the<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 Layer 2 and Layer 3 data center network=
 infrastructure in the<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 presence of VMs in a multi-tenant envir=
onment, discussed in section 3<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 of [RFC7348], by providing Layer 2 over=
lay scheme on a Layer 3 network.<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 Another use is as an encapsulation for =
EVPN [RFC 8365].<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0In the remainder of this document the te=
rms VM and End Station<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0are used interchangeably.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 In the absence of a router in the overl=
ay, a VM can communicate with<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 another VM only if they are on the same=
 VXLAN segment.=C2=A0 VMs are<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 unaware of VXLAN tunnels as a VXLAN tun=
nel is terminated on a VXLAN<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 Tunnel End Point (VTEP) (hypervisor/TOR=
).=C2=A0 VTEPs (hypervisor/TOR) are<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 responsible for encapsulating and decap=
sulating frames exchanged<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 among VMs.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas &lt;<a =
href=3D"mailto:jhaas@pfrc.org" target=3D"_blank">jhaas@pfrc.org</a>&gt; wro=
te:<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; BESS Working Group members,<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; <a href=3D"https://tools.ietf.org/html/draft-ie=
tf-bfd-vxlan-04" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.or=
g/html/draft-ietf-bfd-vxlan-04</a><br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; BFD has finished working group last call on BFD=
 for Vxlan and is about ready<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; to request publication as an RFC.=C2=A0 A last =
minute comment suggested that we<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; should consider inviting comment from your work=
ing group for expertise.<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; We will be leaving the last call open until Dec=
ember 21 to leave time for<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; final comments.<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; -- Jeff (for BFD)<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; _______________________________________________=
<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; BESS mailing list<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; <a href=3D"mailto:BESS@ietf.org" target=3D"_bla=
nk">BESS@ietf.org</a><br>
=C2=A0 =C2=A0 &gt;&gt; &gt; <a href=3D"https://www.ietf.org/mailman/listinf=
o/bess" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/l=
istinfo/bess</a><br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; _______________________________________________<br>
=C2=A0 =C2=A0 &gt;&gt; BESS mailing list<br>
=C2=A0 =C2=A0 &gt;&gt; <a href=3D"mailto:BESS@ietf.org" target=3D"_blank">B=
ESS@ietf.org</a><br>
=C2=A0 =C2=A0 &gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/bes=
s" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/listin=
fo/bess</a><br>
<br>
<br>
<br>
</blockquote></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
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Hi Anoop, et al.,
appreciate your check of the final version of the update to the draft.
Below is the new text as in the working version:
   One use of VXLAN is in data centers interconnecting VMs of a tenant.
   VXLAN addresses requirements of the Layer 2 and Layer 3 data center
   network infrastructure in the presence of VMs in a multi-tenant
   environment, discussed in section 3 [RFC7348], by providing Layer 2
   overlay scheme on a Layer 3 network.  Another use is as an
   encapsulation for Ethernet VPN [RFC8365].

   This document is written assuming the use of VXLAN for virtualized
   hosts and refers to VMs and VTEPs in hypervisors.  However, the
   concepts are equally applicable to non-virtualized hosts attached to
   VTEPs in switches.

Kind regards,
Greg

On Wed, Dec 19, 2018 at 6:28 AM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Anoop,
> thank you for the great text you've contributed. Accepted. I'll update th=
e
> working text and publish later today.
>
> Kind regards,
> Greg
>
> On Wed, Dec 19, 2018 at 5:19 AM Reshad Rahman (rrahman) <rrahman@cisco.co=
m>
> wrote:
>
>> +1 to Anoop's comments. I've made similar comment to Greg privately, and
>> Anoop's proposed text clears things up.
>>
>> Regards,
>> Reshad (no hat).
>>
>> =EF=BB=BFOn 2018-12-19, 1:54 AM, "Rtg-bfd on behalf of Anoop Ghanwani" <
>> rtg-bfd-bounces@ietf.org on behalf of anoop@alumni.duke.edu> wrote:
>>
>>     Hi Greg,
>>
>>     Yes this captures what I was trying to get added.
>>
>>     Perhaps the last sentence can be changed to:
>>
>>     "This document is written assuming the use of VXLAN for virtualized
>>     hosts and refers to VMs and VTEPs in hypervisors.  However, the
>>     concepts are equally applicable to non-virtualized hosts attached to
>>     VTEPs in switches."
>>
>>     Thanks,
>>     Anoop
>>
>>     On Tue, Dec 18, 2018 at 12:17 PM Greg Mirsky <gregimirsky@gmail.com>
>> wrote:
>>     >
>>     > Hi Anoop,
>>     > thank you for your comments and the suggested text. To clarify the
>> extent of the update, would the following accurately reflect the change =
in
>> Introduction you're proposing:
>>     > OLD TEXT:
>>     >    VXLAN is typically deployed in data centers interconnecting
>>     >    virtualized hosts of a tenant.  VXLAN addresses requirements of
>> the
>>     >    Layer 2 and Layer 3 data center network infrastructure in the
>>     >    presence of VMs in a multi-tenant environment, discussed in
>> section 3
>>     >    [RFC7348], by providing Layer 2 overlay scheme on a Layer 3
>> network.
>>     > NEW TEXT:
>>     >   One use of VXLAN is in data centers interconnecting
>>     >   VMs of a tenant.  VXLAN addresses requirements of the
>>     >    Layer 2 and Layer 3 data center network infrastructure in the
>>     >    presence of VMs in a multi-tenant environment, discussed in
>> section 3
>>     >    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3
>> network.
>>     >    Another use is as an encapsulation for EVPN [RFC 8365].
>>     >
>>     >   In the remainder of this document the terms VM and End Station
>>     >   are used interchangeably.
>>     >
>>     > If my understanding of the proposed update is correct, I'd be glad
>> to use it (adding RFC 8365 as Informational reference).  Should note tha=
t
>> in the draft we never used "End Station". Perhaps the last sentence is n=
ot
>> required.
>>     >
>>     > What do you think?
>>     >
>>     > Regards,
>>     > Greg
>>     >
>>     > On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani <
>> anoop@alumni.duke.edu> wrote:
>>     >>
>>     >> I would change the introduction to the following to mention the
>> use of
>>     >> VXLAN by BGP EVPN.
>>     >>
>>     >> Thanks,
>>     >> Anoop
>>     >>
>>     >> =3D=3D
>>     >>
>>     >>    "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348]
>> provides
>>     >>    an encapsulation scheme that allows building an overlay networ=
k
>> by
>>     >>    decoupling the address space of the attached virtual hosts fro=
m
>> that
>>     >>    of the network.
>>     >>
>>     >>   One use of VXLAN is in data centers interconnecting
>>     >>   VMs of a tenant.  VXLAN addresses requirements of the
>>     >>    Layer 2 and Layer 3 data center network infrastructure in the
>>     >>    presence of VMs in a multi-tenant environment, discussed in
>> section 3
>>     >>    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3
>> network.
>>     >>    Another use is as an encapsulation for EVPN [RFC 8365].
>>     >>
>>     >>   In the remainder of this document the terms VM and End Station
>>     >>   are used interchangeably.
>>     >>
>>     >>    In the absence of a router in the overlay, a VM can communicat=
e
>> with
>>     >>    another VM only if they are on the same VXLAN segment.  VMs ar=
e
>>     >>    unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a
>> VXLAN
>>     >>    Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs
>> (hypervisor/TOR) are
>>     >>    responsible for encapsulating and decapsulating frames exchang=
ed
>>     >>    among VMs.
>>     >>
>>     >> On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas <jhaas@pfrc.org>
>> wrote:
>>     >> >
>>     >> > BESS Working Group members,
>>     >> >
>>     >> > https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04
>>     >> >
>>     >> > BFD has finished working group last call on BFD for Vxlan and i=
s
>> about ready
>>     >> > to request publication as an RFC.  A last minute comment
>> suggested that we
>>     >> > should consider inviting comment from your working group for
>> expertise.
>>     >> >
>>     >> > We will be leaving the last call open until December 21 to leav=
e
>> time for
>>     >> > final comments.
>>     >> >
>>     >> > -- Jeff (for BFD)
>>     >> >
>>     >> > _______________________________________________
>>     >> > BESS mailing list
>>     >> > BESS@ietf.org
>>     >> > https://www.ietf.org/mailman/listinfo/bess
>>     >>
>>     >> _______________________________________________
>>     >> BESS mailing list
>>     >> BESS@ietf.org
>>     >> https://www.ietf.org/mailman/listinfo/bess
>>
>>
>>
>>

--00000000000010c291057d614a4b
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Hi Anoop, et al.,<div>appreciate your che=
ck of the final version of the update to the draft. Below is the new text a=
s in the working version:</div><div><div>=C2=A0 =C2=A0One use of VXLAN is i=
n data centers interconnecting VMs of a tenant.</div><div>=C2=A0 =C2=A0VXLA=
N addresses requirements of the Layer 2 and Layer 3 data center</div><div>=
=C2=A0 =C2=A0network infrastructure in the presence of VMs in a multi-tenan=
t</div><div>=C2=A0 =C2=A0environment, discussed in section 3 [RFC7348], by =
providing Layer 2</div><div>=C2=A0 =C2=A0overlay scheme on a Layer 3 networ=
k.=C2=A0 Another use is as an</div><div>=C2=A0 =C2=A0encapsulation for Ethe=
rnet VPN [RFC8365].</div><div><br></div><div>=C2=A0 =C2=A0This document is =
written assuming the use of VXLAN for virtualized</div><div>=C2=A0 =C2=A0ho=
sts and refers to VMs and VTEPs in hypervisors.=C2=A0 However, the</div><di=
v>=C2=A0 =C2=A0concepts are equally applicable to non-virtualized hosts att=
ached to</div><div>=C2=A0 =C2=A0VTEPs in switches.</div></div><div><br></di=
v><div>Kind regards,</div><div>Greg</div></div></div><br><div class=3D"gmai=
l_quote"><div dir=3D"ltr">On Wed, Dec 19, 2018 at 6:28 AM 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:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"lt=
r">Hi Anoop,<div>thank you for the great text you&#39;ve contributed. Accep=
ted. I&#39;ll update the working text and publish later today.</div><div><b=
r></div><div>Kind regards,</div><div>Greg</div></div><br><div class=3D"gmai=
l_quote"><div dir=3D"ltr">On Wed, Dec 19, 2018 at 5:19 AM Reshad Rahman (rr=
ahman) &lt;<a href=3D"mailto:rrahman@cisco.com" target=3D"_blank">rrahman@c=
isco.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-le=
ft:1ex">+1 to Anoop&#39;s comments. I&#39;ve made similar comment to Greg p=
rivately, and Anoop&#39;s proposed text clears things up.<br>
<br>
Regards,<br>
Reshad (no hat).<br>
<br>
=EF=BB=BFOn 2018-12-19, 1:54 AM, &quot;Rtg-bfd on behalf of Anoop Ghanwani&=
quot; &lt;<a href=3D"mailto:rtg-bfd-bounces@ietf.org" target=3D"_blank">rtg=
-bfd-bounces@ietf.org</a> on behalf of <a href=3D"mailto:anoop@alumni.duke.=
edu" target=3D"_blank">anoop@alumni.duke.edu</a>&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 Hi Greg,<br>
<br>
=C2=A0 =C2=A0 Yes this captures what I was trying to get added.<br>
<br>
=C2=A0 =C2=A0 Perhaps the last sentence can be changed to:<br>
<br>
=C2=A0 =C2=A0 &quot;This document is written assuming the use of VXLAN for =
virtualized<br>
=C2=A0 =C2=A0 hosts and refers to VMs and VTEPs in hypervisors.=C2=A0 Howev=
er, the<br>
=C2=A0 =C2=A0 concepts are equally applicable to non-virtualized hosts atta=
ched to<br>
=C2=A0 =C2=A0 VTEPs in switches.&quot;<br>
<br>
=C2=A0 =C2=A0 Thanks,<br>
=C2=A0 =C2=A0 Anoop<br>
<br>
=C2=A0 =C2=A0 On Tue, Dec 18, 2018 at 12:17 PM Greg Mirsky &lt;<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt=
; wrote:<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; Hi Anoop,<br>
=C2=A0 =C2=A0 &gt; thank you for your comments and the suggested text. To c=
larify the extent of the update, would the following accurately reflect the=
 change in Introduction you&#39;re proposing:<br>
=C2=A0 =C2=A0 &gt; OLD TEXT:<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 VXLAN is typically deployed in data centers=
 interconnecting<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 virtualized hosts of a tenant.=C2=A0 VXLAN =
addresses requirements of the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 Layer 2 and Layer 3 data center network inf=
rastructure in the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 presence of VMs in a multi-tenant environme=
nt, discussed in section 3<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 [RFC7348], by providing Layer 2 overlay sch=
eme on a Layer 3 network.<br>
=C2=A0 =C2=A0 &gt; NEW TEXT:<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0One use of VXLAN is in data centers intercon=
necting<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0VMs of a tenant.=C2=A0 VXLAN addresses requi=
rements of the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 Layer 2 and Layer 3 data center network inf=
rastructure in the<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 presence of VMs in a multi-tenant environme=
nt, discussed in section 3<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 of [RFC7348], by providing Layer 2 overlay =
scheme on a Layer 3 network.<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0 Another use is as an encapsulation for EVPN=
 [RFC 8365].<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0In the remainder of this document the terms =
VM and End Station<br>
=C2=A0 =C2=A0 &gt;=C2=A0 =C2=A0are used interchangeably.<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; If my understanding of the proposed update is correct, I=
&#39;d be glad to use it (adding RFC 8365 as Informational reference).=C2=
=A0 Should note that in the draft we never used &quot;End Station&quot;. Pe=
rhaps the last sentence is not required.<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; What do you think?<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; Regards,<br>
=C2=A0 =C2=A0 &gt; Greg<br>
=C2=A0 =C2=A0 &gt;<br>
=C2=A0 =C2=A0 &gt; On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani &lt;<a h=
ref=3D"mailto:anoop@alumni.duke.edu" target=3D"_blank">anoop@alumni.duke.ed=
u</a>&gt; wrote:<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; I would change the introduction to the following to =
mention the use of<br>
=C2=A0 =C2=A0 &gt;&gt; VXLAN by BGP EVPN.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; Thanks,<br>
=C2=A0 =C2=A0 &gt;&gt; Anoop<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; =3D=3D<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 &quot;Virtual eXtensible Local Area Net=
work&quot; (VXLAN) [RFC7348] provides<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 an encapsulation scheme that allows bui=
lding an overlay network by<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 decoupling the address space of the att=
ached virtual hosts from that<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 of the network.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0One use of VXLAN is in data centers inte=
rconnecting<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0VMs of a tenant.=C2=A0 VXLAN addresses r=
equirements of the<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 Layer 2 and Layer 3 data center network=
 infrastructure in the<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 presence of VMs in a multi-tenant envir=
onment, discussed in section 3<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 of [RFC7348], by providing Layer 2 over=
lay scheme on a Layer 3 network.<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 Another use is as an encapsulation for =
EVPN [RFC 8365].<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0In the remainder of this document the te=
rms VM and End Station<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0are used interchangeably.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 In the absence of a router in the overl=
ay, a VM can communicate with<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 another VM only if they are on the same=
 VXLAN segment.=C2=A0 VMs are<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 unaware of VXLAN tunnels as a VXLAN tun=
nel is terminated on a VXLAN<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 Tunnel End Point (VTEP) (hypervisor/TOR=
).=C2=A0 VTEPs (hypervisor/TOR) are<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 responsible for encapsulating and decap=
sulating frames exchanged<br>
=C2=A0 =C2=A0 &gt;&gt;=C2=A0 =C2=A0 among VMs.<br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas &lt;<a =
href=3D"mailto:jhaas@pfrc.org" target=3D"_blank">jhaas@pfrc.org</a>&gt; wro=
te:<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; BESS Working Group members,<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; <a href=3D"https://tools.ietf.org/html/draft-ie=
tf-bfd-vxlan-04" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.or=
g/html/draft-ietf-bfd-vxlan-04</a><br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; BFD has finished working group last call on BFD=
 for Vxlan and is about ready<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; to request publication as an RFC.=C2=A0 A last =
minute comment suggested that we<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; should consider inviting comment from your work=
ing group for expertise.<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; We will be leaving the last call open until Dec=
ember 21 to leave time for<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; final comments.<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; -- Jeff (for BFD)<br>
=C2=A0 =C2=A0 &gt;&gt; &gt;<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; _______________________________________________=
<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; BESS mailing list<br>
=C2=A0 =C2=A0 &gt;&gt; &gt; <a href=3D"mailto:BESS@ietf.org" target=3D"_bla=
nk">BESS@ietf.org</a><br>
=C2=A0 =C2=A0 &gt;&gt; &gt; <a href=3D"https://www.ietf.org/mailman/listinf=
o/bess" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/l=
istinfo/bess</a><br>
=C2=A0 =C2=A0 &gt;&gt;<br>
=C2=A0 =C2=A0 &gt;&gt; _______________________________________________<br>
=C2=A0 =C2=A0 &gt;&gt; BESS mailing list<br>
=C2=A0 =C2=A0 &gt;&gt; <a href=3D"mailto:BESS@ietf.org" target=3D"_blank">B=
ESS@ietf.org</a><br>
=C2=A0 =C2=A0 &gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/bes=
s" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/listin=
fo/bess</a><br>
<br>
<br>
<br>
</blockquote></div>
</blockquote></div>

--00000000000010c291057d614a4b--


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Subject: [bess] Genart last call review of draft-ietf-bess-evpn-vpls-seamless-integ-05
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Reviewer: Pete Resnick
Review result: Ready with Issues

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

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-bess-evpn-vpls-seamless-integ-0
Reviewer: Pete Resnick
Review Date: 2018-12-19
IETF LC End Date: 2018-12-18
IESG Telechat date: Not scheduled for a telechat

Summary: Ready with some nits, but one process issue/query.

Major issues: None

Minor issues:

This document is intended for Proposed Standard. It doesn't have protocol as
much as operational configuration information for integration. RFC 2026 section
5 says:

   The BCP subseries of the RFC series is designed to be a way to
   standardize practices and the results of community deliberations.
   [...]
   Historically Internet standards have generally been concerned with
   the technical specifications for hardware and software required for
   computer communication across interconnected networks.  However,
   since the Internet itself is composed of networks operated by a great
   variety of organizations, with diverse goals and rules, good user
   service requires that the operators and administrators of the
   Internet follow some common guidelines for policies and operations.

That sounds like what this document is doing. It also sounds like this document
is unlike to advance to Internet Standard, as there's not the kind of iterative
implementation that protocols go through. It's not a big deal either way, but
this does seem better suited to a BCP.

Nits/editorial comments:

Abstract: s/draft/document/g

Introduction: "Many Service Providers (SPs) who...". You don't use "SP"
anywhere else in the document, and other places where you use the phrase it
isn't capitalized. Suggest just saying "Many service providers who..."

Â§1, Definitions:

   (PBB-)VPLS: refers to both, PBB-VPLS and VPLS. As for EVPN, this
   abbreviation is used when the text applies to both technologies.

It says EVPN in the second sentence. I don't understand. Did you mean VPLS?

Â§2: The 4 "MUST"s and 1 "MAY" aren't requirements on the implementation;
they're the requirements this document will satisfy. Seems like they shouldn't
be capitalized.

Â§3.2, second bullet, 3.4.1, last paragraph, Â§4.2, second bullet, and Â§4.4.1,
last paragraph: Why are the "must"s not capitalized?



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From nobody Wed Dec 19 09:42:00 2018
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From: Anoop Ghanwani <anoop@alumni.duke.edu>
Date: Wed, 19 Dec 2018 09:41:44 -0800
Message-ID: <CA+-tSzwPYEesWu9JKJw5YTZQ39EW-CHdkck=UXLg+nN3SEM5yw@mail.gmail.com>
To: Greg Mirsky <gregimirsky@gmail.com>
Cc: "Reshad Rahman (rrahman)" <rrahman@cisco.com>, rtg-bfd WG <rtg-bfd@ietf.org>, BESS <bess@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/NN2lPgSL6efNMSfAidm8nk_itos>
Subject: Re: [bess] BFD WGLC for draft-ietf-bfd-vxlan; BESS input solicited
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Greg,

This is fine.

Thanks,
Anoop

On Wed, Dec 19, 2018 at 7:01 AM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
> Hi Anoop, et al.,
> appreciate your check of the final version of the update to the draft. Be=
low is the new text as in the working version:
>    One use of VXLAN is in data centers interconnecting VMs of a tenant.
>    VXLAN addresses requirements of the Layer 2 and Layer 3 data center
>    network infrastructure in the presence of VMs in a multi-tenant
>    environment, discussed in section 3 [RFC7348], by providing Layer 2
>    overlay scheme on a Layer 3 network.  Another use is as an
>    encapsulation for Ethernet VPN [RFC8365].
>
>    This document is written assuming the use of VXLAN for virtualized
>    hosts and refers to VMs and VTEPs in hypervisors.  However, the
>    concepts are equally applicable to non-virtualized hosts attached to
>    VTEPs in switches.
>
> Kind regards,
> Greg
>
> On Wed, Dec 19, 2018 at 6:28 AM Greg Mirsky <gregimirsky@gmail.com> wrote=
:
>>
>> Hi Anoop,
>> thank you for the great text you've contributed. Accepted. I'll update t=
he working text and publish later today.
>>
>> Kind regards,
>> Greg
>>
>> On Wed, Dec 19, 2018 at 5:19 AM Reshad Rahman (rrahman) <rrahman@cisco.c=
om> wrote:
>>>
>>> +1 to Anoop's comments. I've made similar comment to Greg privately, an=
d Anoop's proposed text clears things up.
>>>
>>> Regards,
>>> Reshad (no hat).
>>>
>>> =EF=BB=BFOn 2018-12-19, 1:54 AM, "Rtg-bfd on behalf of Anoop Ghanwani" =
<rtg-bfd-bounces@ietf.org on behalf of anoop@alumni.duke.edu> wrote:
>>>
>>>     Hi Greg,
>>>
>>>     Yes this captures what I was trying to get added.
>>>
>>>     Perhaps the last sentence can be changed to:
>>>
>>>     "This document is written assuming the use of VXLAN for virtualized
>>>     hosts and refers to VMs and VTEPs in hypervisors.  However, the
>>>     concepts are equally applicable to non-virtualized hosts attached t=
o
>>>     VTEPs in switches."
>>>
>>>     Thanks,
>>>     Anoop
>>>
>>>     On Tue, Dec 18, 2018 at 12:17 PM Greg Mirsky <gregimirsky@gmail.com=
> wrote:
>>>     >
>>>     > Hi Anoop,
>>>     > thank you for your comments and the suggested text. To clarify th=
e extent of the update, would the following accurately reflect the change i=
n Introduction you're proposing:
>>>     > OLD TEXT:
>>>     >    VXLAN is typically deployed in data centers interconnecting
>>>     >    virtualized hosts of a tenant.  VXLAN addresses requirements o=
f the
>>>     >    Layer 2 and Layer 3 data center network infrastructure in the
>>>     >    presence of VMs in a multi-tenant environment, discussed in se=
ction 3
>>>     >    [RFC7348], by providing Layer 2 overlay scheme on a Layer 3 ne=
twork.
>>>     > NEW TEXT:
>>>     >   One use of VXLAN is in data centers interconnecting
>>>     >   VMs of a tenant.  VXLAN addresses requirements of the
>>>     >    Layer 2 and Layer 3 data center network infrastructure in the
>>>     >    presence of VMs in a multi-tenant environment, discussed in se=
ction 3
>>>     >    of [RFC7348], by providing Layer 2 overlay scheme on a Layer 3=
 network.
>>>     >    Another use is as an encapsulation for EVPN [RFC 8365].
>>>     >
>>>     >   In the remainder of this document the terms VM and End Station
>>>     >   are used interchangeably.
>>>     >
>>>     > If my understanding of the proposed update is correct, I'd be gla=
d to use it (adding RFC 8365 as Informational reference).  Should note that=
 in the draft we never used "End Station". Perhaps the last sentence is not=
 required.
>>>     >
>>>     > What do you think?
>>>     >
>>>     > Regards,
>>>     > Greg
>>>     >
>>>     > On Tue, Dec 18, 2018 at 10:08 AM Anoop Ghanwani <anoop@alumni.duk=
e.edu> wrote:
>>>     >>
>>>     >> I would change the introduction to the following to mention the =
use of
>>>     >> VXLAN by BGP EVPN.
>>>     >>
>>>     >> Thanks,
>>>     >> Anoop
>>>     >>
>>>     >> =3D=3D
>>>     >>
>>>     >>    "Virtual eXtensible Local Area Network" (VXLAN) [RFC7348] pro=
vides
>>>     >>    an encapsulation scheme that allows building an overlay netwo=
rk by
>>>     >>    decoupling the address space of the attached virtual hosts fr=
om that
>>>     >>    of the network.
>>>     >>
>>>     >>   One use of VXLAN is in data centers interconnecting
>>>     >>   VMs of a tenant.  VXLAN addresses requirements of the
>>>     >>    Layer 2 and Layer 3 data center network infrastructure in the
>>>     >>    presence of VMs in a multi-tenant environment, discussed in s=
ection 3
>>>     >>    of [RFC7348], by providing Layer 2 overlay scheme on a Layer =
3 network.
>>>     >>    Another use is as an encapsulation for EVPN [RFC 8365].
>>>     >>
>>>     >>   In the remainder of this document the terms VM and End Station
>>>     >>   are used interchangeably.
>>>     >>
>>>     >>    In the absence of a router in the overlay, a VM can communica=
te with
>>>     >>    another VM only if they are on the same VXLAN segment.  VMs a=
re
>>>     >>    unaware of VXLAN tunnels as a VXLAN tunnel is terminated on a=
 VXLAN
>>>     >>    Tunnel End Point (VTEP) (hypervisor/TOR).  VTEPs (hypervisor/=
TOR) are
>>>     >>    responsible for encapsulating and decapsulating frames exchan=
ged
>>>     >>    among VMs.
>>>     >>
>>>     >> On Wed, Dec 12, 2018 at 6:02 AM Jeffrey Haas <jhaas@pfrc.org> wr=
ote:
>>>     >> >
>>>     >> > BESS Working Group members,
>>>     >> >
>>>     >> > https://tools.ietf.org/html/draft-ietf-bfd-vxlan-04
>>>     >> >
>>>     >> > BFD has finished working group last call on BFD for Vxlan and =
is about ready
>>>     >> > to request publication as an RFC.  A last minute comment sugge=
sted that we
>>>     >> > should consider inviting comment from your working group for e=
xpertise.
>>>     >> >
>>>     >> > We will be leaving the last call open until December 21 to lea=
ve time for
>>>     >> > final comments.
>>>     >> >
>>>     >> > -- Jeff (for BFD)
>>>     >> >
>>>     >> > _______________________________________________
>>>     >> > BESS mailing list
>>>     >> > BESS@ietf.org
>>>     >> > https://www.ietf.org/mailman/listinfo/bess
>>>     >>
>>>     >> _______________________________________________
>>>     >> BESS mailing list
>>>     >> BESS@ietf.org
>>>     >> https://www.ietf.org/mailman/listinfo/bess
>>>
>>>
>>>


From nobody Wed Dec 19 11:29:06 2018
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Subject: [bess] bess - New Meeting Session Request for IETF 104
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A new meeting session request has just been submitted by mankamana prasad mishra, a Secretary of the bess working group.


---------------------------------------------------------
Working Group Name: BGP Enabled ServiceS
Area Name: Routing Area
Session Requester: mankamana mishra

Number of Sessions: 1
Length of Session(s):  2 Hours
Number of Attendees: 80
Conflicts to Avoid: 
 First Priority:  idr nvo3
 Second Priority:  spring sfc mpls pim bier pals
 Third Priority:  i2rs l2sm


People who must be present:
  Matthew Bocci
  Martin Vigoureux
  Stephane Litkowski
  mankamana prasad mishra

Resources Requested:

Special Requests:
  last few sessions had a very busy agenda, it would be great to get 2h30  slot. 
---------------------------------------------------------


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From: Stuart Mackie <wsmackie@juniper.net>
To: "Andrew G. Malis" <agmalis@gmail.com>, "bess@ietf.org" <bess@ietf.org>, "draft-ietf-bess-service-chaining@ietf.org" <draft-ietf-bess-service-chaining@ietf.org>
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Thread-Topic: Comment on draft-ietf-bess-service-chaining-06
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/ZwwEZP_lIax9itT6yaMn4ntze7c>
Subject: Re: [bess] Comment on draft-ietf-bess-service-chaining-06
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In-Reply-To: <81380B9D-9064-4EF1-A83E-E300E5B8D810@juniper.net>
From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Wed, 19 Dec 2018 20:16:42 -0500
Message-ID: <CAA=duU2Eg=S_-6DDa55X1=kkkaDomDqiWTixMrj-vSiNPBiyXw@mail.gmail.com>
To: wsmackie@juniper.net
Cc: bess@ietf.org, draft-ietf-bess-service-chaining@ietf.org,  draft-ietf-mpls-sfc-encapsulation@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/MBRqmumF6lbX14gl7mSuWZDx0qM>
Subject: Re: [bess] Comment on draft-ietf-bess-service-chaining-06
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Stuart,

Thanks for your reply. I can see your point about wanting to do service
chaining without the NSH (as I'm sure you're aware, draft-ietf-mpls-sfc is
another example of this), but would you never have the need for service
chain per-packet metadata as it's being used in the SFC WG?

Even if the answer to that question is currently no, my other point remains
that this draft provides an excellent label distribution mechanism for NSH
over MPLS, which usage I'm confident will be defined in the future. I agree
that doesn't require an anticipatory reference in the draft. But it might
be nice ... :-)

Cheers,
Andy


On Wed, Dec 19, 2018 at 5:59 PM Stuart Mackie <wsmackie@juniper.net> wrote:

> Hi Andy,
>
>
>
> I=E2=80=98m struggling to make the connection, since
> draft-ietf-bess-service-chaining is specifically about how to do service
> chaining without needing a new protocol like NSH, so SFF labels would nev=
er
> be used.
>
>
>
> In draft-ietf-bess-service-chaining , if MPLS transport were used between
> Service Function Forwarders, a label would be allocated for a SF interfac=
e
> when a route pointing to it is installed (by the controller). This would =
be
> advertised to the controller and from there sent to the forwarders with
> egress interfaces for the previous SF in the chain. The label would be us=
ed
> at the bottom of the MPLS stack as is done normally.
>
>
>
> Cheers
>
>
>
> Stuart
>
> -914 886 2534
>
>
>
> *From: *"Andrew G. Malis" <agmalis@gmail.com>
> *Date: *Tuesday, December 4, 2018 at 5:10 PM
> *To: *"bess@ietf.org" <bess@ietf.org>, "
> draft-ietf-bess-service-chaining@ietf.org" <
> draft-ietf-bess-service-chaining@ietf.org>
> *Cc: *"draft-ietf-mpls-sfc-encapsulation@ietf.org" <
> draft-ietf-mpls-sfc-encapsulation@ietf.org>
> *Subject: *Comment on draft-ietf-bess-service-chaining-06
> *Resent-From: *<alias-bounces@ietf.org>
> *Resent-To: *<rex@cisco.com>, <wsmackie@juniper.net>, <dhrao@cisco.com>, =
<
> brunorijsman@gmail.com>, <mnapierala@att.com>, <thomas.morin@orange.com>
> *Resent-Date: *Tuesday, December 4, 2018 at 5:10 PM
>
>
>
> I just read the new revision of draft-ietf-bess-service-chaining. Althoug=
h
> the draft doesn't use the RFC 8300 NSH, it could very easily take advanta=
ge
> of features provided by the NSH (such as metadata) by adding NSH over MPL=
S
> as defined in draft-ietf-mpls-sfc-encapsulation to the list of
> encapsulations listed in section 2.5. And this draft provides an excellen=
t
> label distribution mechanism for NSH over MPLS. It would make a lot of
> sense to add a reference to draft-ietf-mpls-sfc-encapsulation in the list
> of encapsulations in section 2.5.
>
>
>
> Thanks,
>
> Andy
>
>
>

--000000000000cf6880057d69e253
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr">Stuart,<div><br></div><div>Thanks for you=
r reply. I can see your point about wanting to do service chaining without =
the NSH (as I&#39;m sure you&#39;re aware, draft-ietf-mpls-sfc is another e=
xample of this), but would you never have the need for service chain per-pa=
cket metadata as it&#39;s being used in the SFC WG?=C2=A0</div><div><br></d=
iv><div>Even if the answer to that question is currently no, my other point=
 remains that this draft provides an excellent label distribution mechanism=
 for NSH over MPLS, which usage I&#39;m confident will be defined in the fu=
ture. I agree that doesn&#39;t require an anticipatory reference in the dra=
ft. But it might be nice ... :-)</div><div><br></div><div>Cheers,</div><div=
>Andy</div><div><br></div></div></div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr">On Wed, Dec 19, 2018 at 5:59 PM Stuart Mackie &lt;<a href=3D"mai=
lto:wsmackie@juniper.net" target=3D"_blank">wsmackie@juniper.net</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">





<div lang=3D"EN-US">
<div class=3D"gmail-m_7669522707923981646gmail-m_-5621048259332925196WordSe=
ction1">
<p class=3D"MsoNormal">Hi Andy,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">I=E2=80=98m struggling to make the connection, since=
 draft-ietf-bess-service-chaining is specifically about how to do service c=
haining without needing a new protocol like NSH, so SFF labels would never =
be used.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">In draft-ietf-bess-service-chaining , if MPLS transp=
ort were used between Service Function Forwarders, a label would be allocat=
ed for a SF interface when a route pointing to it is installed (by the cont=
roller). This would be advertised
 to the controller and from there sent to the forwarders with egress interf=
aces for the previous SF in the chain. The label would be used at the botto=
m of the MPLS stack as is done normally.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Cheers<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Stuart<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">-914 886 2534<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><b><span style=3D"font-s=
ize:12pt;color:black">From:
</span></b><span style=3D"font-size:12pt;color:black">&quot;Andrew G. Malis=
&quot; &lt;<a href=3D"mailto:agmalis@gmail.com" target=3D"_blank">agmalis@g=
mail.com</a>&gt;<br>
<b>Date: </b>Tuesday, December 4, 2018 at 5:10 PM<br>
<b>To: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-bess-service-chainin=
g@ietf.org" target=3D"_blank">draft-ietf-bess-service-chaining@ietf.org</a>=
&quot; &lt;<a href=3D"mailto:draft-ietf-bess-service-chaining@ietf.org" tar=
get=3D"_blank">draft-ietf-bess-service-chaining@ietf.org</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:draft-ietf-mpls-sfc-encapsulation@ietf.o=
rg" target=3D"_blank">draft-ietf-mpls-sfc-encapsulation@ietf.org</a>&quot; =
&lt;<a href=3D"mailto:draft-ietf-mpls-sfc-encapsulation@ietf.org" target=3D=
"_blank">draft-ietf-mpls-sfc-encapsulation@ietf.org</a>&gt;<br>
<b>Subject: </b>Comment on draft-ietf-bess-service-chaining-06<br>
<b>Resent-From: </b>&lt;<a href=3D"mailto:alias-bounces@ietf.org" target=3D=
"_blank">alias-bounces@ietf.org</a>&gt;<br>
<b>Resent-To: </b>&lt;<a href=3D"mailto:rex@cisco.com" target=3D"_blank">re=
x@cisco.com</a>&gt;, &lt;<a href=3D"mailto:wsmackie@juniper.net" target=3D"=
_blank">wsmackie@juniper.net</a>&gt;, &lt;<a href=3D"mailto:dhrao@cisco.com=
" target=3D"_blank">dhrao@cisco.com</a>&gt;, &lt;<a href=3D"mailto:brunorij=
sman@gmail.com" target=3D"_blank">brunorijsman@gmail.com</a>&gt;, &lt;<a hr=
ef=3D"mailto:mnapierala@att.com" target=3D"_blank">mnapierala@att.com</a>&g=
t;, &lt;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">thomas=
.morin@orange.com</a>&gt;<br>
<b>Resent-Date: </b>Tuesday, December 4, 2018 at 5:10 PM<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">I just read the new revi=
sion of=C2=A0draft-ietf-bess-service-chaining. Although the draft doesn&#39=
;t use the RFC 8300 NSH, it could very easily take advantage of features pr=
ovided by the NSH (such as metadata) by adding
 NSH over MPLS as defined in=C2=A0draft-ietf-mpls-sfc-encapsulation to the =
list of encapsulations listed in section 2.5. And this draft provides an ex=
cellent label distribution mechanism for NSH over MPLS. It would make a lot=
 of sense to add a reference to=C2=A0draft-ietf-mpls-sfc-encapsulation
 in the list of encapsulations in section 2.5.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">Thanks,<u></u><u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">Andy<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>

</blockquote></div>

--000000000000cf6880057d69e253--


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From: Anoop Ghanwani <anoop@alumni.duke.edu>
Date: Wed, 19 Dec 2018 17:51:40 -0800
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To: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
Cc: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/kmAOCkchJpisYaPqx_3hMHxGx78>
Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
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Thanks Jorge!

On Wed, Dec 19, 2018 at 1:18 AM Rabadan, Jorge (Nokia - US/Mountain
View) <jorge.rabadan@nokia.com> wrote:
>
> Hi Anoop,
>
> Thank you for your review. We took all your comments.
> Please see in-line how we are resolving them in rev 07.
>
> Thanks.
> Jorge
>
> -----Original Message-----
> From: BESS <bess-bounces@ietf.org> on behalf of "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
> Date: Friday, December 7, 2018 at 6:09 PM
> To: Anoop Ghanwani <anoop@alumni.duke.edu>, "bess@ietf.org" <bess@ietf.org>
> Subject: Re: [bess] Last Call: <draft-ietf-bess-evpn-df-election-framework-06.txt> (Framework for EVPN Designated Forwarder Election Extensibility) to Proposed Standard
>
>     Hi Anoop,
>
>     Thank you very much for your editorial comments and review.
>     We will take care of it.
>
>     Best,
>     --Satya
>
>
>     On 12/7/18, 1:01 AM, "BESS on behalf of Anoop Ghanwani" <bess-bounces@ietf.org on behalf of anoop@alumni.duke.edu> wrote:
>
>         I have reviewed the doc and I have mostly editorial comments.
>
>         Thanks,
>         Anoop
>
>         ==
>
>         Throughout
>
>         VLAN Bundle, VLAN bundle, VLAN-Bundle, VLAN-bundle -- make consistent
>         VLAN Aware Bundle, VLAN-aware bundle, VLAN-Aware Bundle -- make consistent
>         bridge table, Bridge Table -- make consistent (also add definition to
>         terminology section)
>         DF election, DF Election -- make consistent
>         Default DF Election, default DF Election -- make consistent
>         non-DF -> NDF
> [JORGE] done, thx
>
>         Section 1
>
>         double Q-in-Q tags -> Q-in-Q tags
>
>         double is redundant
> [JORGE] done, thx
>
>         Section 2.1
>
>         Fig 1 is a bit confusing.  If the idea of the rectangle is to show a
>         core, then why have connections between PE1 and PE2, PE3, but not
>         between PE1 and PE4?
> [JORGE] good point, fixed it, thx
>
>         Change
>         >>>
>         Layer-2 devices are particularly susceptible to forwarding loops
>         because of the broadcast nature of the Ethernet traffic.
>         >>>
>         to
>         The effect of forwarding loops in a Layer-2 network is particularly
>         severe because of the broadcast nature of Ethernet traffic and the
>         lack of a TTL.
> [JORGE] done, thanks.
>
>         Section 2.2.1
>
>         a v4 or v6 peering -> an IPv4 or IPv6 peering
> [JORGE] done, thanks.
>
>         >>>
>         >From a forwarding perspective, this is
>         a churn, as it results in re-programming the PE ports as either
>         blocking or non-blocking at potentially all PEs when the DF changes.
>         >>>
>
>         Why would the reprogramming change at all PEs?  It should change for
>         at most 2 PEs for each (ES,EVI) being reprogrammed.  Maybe authors
>         were trying to convey something else?
> [JORGE] changed to:
> ***From a forwarding perspective, this is
>    a churn, as it results in re-programming the PE ports as either
>    blocking or non-blocking at the PEs where the DF state changes.***
>
>
>         Section 2.3
>
>         >>>
>         DF Election procedure Generally
>         >>>
>         Missing a period.
> [JORGE] done, thanks.
>
>
>         Section 3
>
>         specification in EVPN -> EVPN specification
> [JORGE] done, thanks.
>
>
>         Section 3.1
>
>         DF WAIT, DF_WAIT -- make consistent
> [JORGE] done, thanks.
>
>         DF Wait timer -- where is this defined?
> [JORGE] This is defined in [RFC7432]. I added a reference.
>
>         Ethernet Segment Route -> Ethernet Segment route
>         stop DF timer ->  stop DF wait timer (?)
>         start DF timer -> start DF wait timer (?)
> [JORGE] done, thanks.
>
>         Section 4
>
>         rather than the state of the server states -> rather than the state of
>         the server (?)
> [JORGE] done, thanks.
>
>         Section 4.2
>
>         Si is the IP address of server i -> Si is the IP address of PE i
> [JORGE] done, thanks.
>
>         operator chooses so -> operator so chooses
> [JORGE] done, thanks.
>
>         Note 0 <= i,j <= Number of PEs -- should this be "< Number of PEs"?
>         Weight(V, Es, Sk) -> Weight(v, Es, Sk)
>         Pseudo-random -> pseudo-random
>         efficient deterministic -> efficient and deterministic
>         V4 -> IPv4
>         V6 -> IPv6
> [JORGE] all of them changed. Thanks.
>
>         _______________________________________________
>         BESS mailing list
>         BESS@ietf.org
>         https://www.ietf.org/mailman/listinfo/bess
>
>
>     _______________________________________________
>     BESS mailing list
>     BESS@ietf.org
>     https://www.ietf.org/mailman/listinfo/bess
>
>
>


From nobody Thu Dec 20 01:36:14 2018
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Subject: [bess] I-D Action: draft-ietf-bess-evpn-df-election-framework-07.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           : Framework for EVPN Designated Forwarder Election Extensibility
        Authors         : Jorge Rabadan
                          Satya Mohanty
                          Ali Sajassi
                          John Drake
                          Kiran Nagaraj
                          Senthil Sathappan
	Filename        : draft-ietf-bess-evpn-df-election-framework-07.txt
	Pages           : 28
	Date            : 2018-12-20

Abstract:
   An alternative to the Default Designated Forwarder (DF) selection
   algorithm in Ethernet VPN (EVPN) networks is defined. The DF is the
   Provider Edge (PE) router responsible for sending broadcast, unknown
   unicast and multicast (BUM) traffic to multi-homed Customer Equipment
   (CE) on a particular Ethernet Segment (ES) within a VLAN. In
   addition, the capability to influence the DF election result for a
   VLAN based on the state of the associated Attachment Circuit (AC) is
   specified.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-df-election-framework/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-df-election-framework-07
https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-df-election-framework-07

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-df-election-framework-07


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: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "Ali Sajassi <sajassi@cisco.com> (sajassi@cisco.com)" <sajassi@cisco.com>
CC: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "jorge.rabadan@nokia.com" <jorge.rabadan@nokia.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: A question about RFC 8317
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/XIukgNU3mVjrIpYetf7_1z2mhmY>
Subject: [bess] A question about RFC 8317
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Ali and all,
I have read RFC 8317<https://tools.ietf.org/html/rfc8317>, and I would lik=
e to clarify a question dealing with Leaf ACs of an EVPN-based E-Tree serv=
ice on All-Active Multi-Homed Ethernet Segments (MH ES).

The reference model for my question is shown in the Embedded diagram below=
.


[cid:image002.png@01D49865.895588B0]

It shows an EVPN E-tree service with one Root customer site and two leaf c=
ustomer sites, where each Leaf CE is dual-homed to the same pair of PEs us=
ing two different All-Active multi-homed Ethernet Segments.

Suppose that the scheme with two RTs (one identifying the Root site and th=
e other identifying the Leaf sites) is used as described in 4.3.1.

Suppose also that each MAC-VRF uses per MAC-VRF label assignment as define=
d in section 9.2.1 of RFC 7432, i.e., advertises exactly one EVPN applicat=
ion label that identifies it as the Egress MAC-VRF, while the disposition =
of the received Ethernet frame within this MAC-VRF is based on the destina=
tion MAC address. In this case the per MAC-VRF label can be also used as t=
he "aliasing" label in the per EVI EAD route.

PE-1 will receive and accept per EVI EAD routes for both MH ES for PE-2 an=
d PE-3 with the corresponding "aliasing" labels.

Suppose that MAC-VRF in PE-2 learns some {MAC, IP} pair  {X, Y}  locally f=
rom the Leaf CE-1 and advertises this pair in the EVPN MAC/IP Advertisemen=
t route. With the "two RTs" scheme this route will be accepted by the MAC-=
VRF in PE-1 but it will not be accepted by the MAC-VRF in PE3. As a conseq=
uence:

-          MAC-VRF in PE-1 will know that this pair has been learned from =
the "blue" all-active MH ES, and therefore can decide to send locally rece=
ived unicast frames with destination MAC address X to PE-3 using the corre=
sponding "aliasing label". No other labels will be included in the EVN enc=
apsulation of such  frames because they are received from the Root AC.

-          MAC-VRF in PE-3 will not know anything about MAC address X, the=
refore, when it receives an EVPN-encapsulated frame with this destination,=
 it will treat it as an "unknown unicast" and flood it to both Leaf CE-1 (=
where it should be sent) and to Leaf CE-2 (where it should not be sent).

Is this what is really supposed to happen in this scenario? If not, what d=
id I miss in the E-tree EVPN solution?

Regards, and lots of thanks in advance,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com


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<p class=3D"MsoNormal">Ali and all,<o:p></o:p></p>
<p class=3D"MsoNormal">I have read <a href=3D"https://tools.ietf.org/html/=
rfc8317">RFC 8317</a>, and I would like to clarify a question dealing with=
 Leaf ACs of an EVPN-based E-Tree service on All-Active Multi-Homed Ethern=
et Segments (MH ES).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The reference model for my question is shown in the=
 Embedded diagram below.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">It shows an EVPN E-tree service with one Root custo=
mer site and two leaf customer sites, where each Leaf CE is dual-homed to =
the same pair of PEs using two different All-Active multi-homed Ethernet S=
egments.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Suppose that the scheme with two RTs (one identifyi=
ng the Root site and the other identifying the Leaf sites) is used as desc=
ribed in 4.3.1.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Suppose also that each MAC-VRF uses per MAC-VRF lab=
el assignment as defined in section 9.2.1 of RFC 7432, i.e., advertises ex=
actly one EVPN application label that identifies it as the Egress MAC-VRF,=
 while the disposition of the received
 Ethernet frame within this MAC-VRF is based on the destination MAC addres=
s. In this case the per MAC-VRF label can be also used as the &#8220;alias=
ing&#8221; label in the per EVI EAD route.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">PE-1 will receive and accept per EVI EAD routes for=
 both MH ES for PE-2 and PE-3 with the corresponding &#8220;aliasing&#8221=
; labels.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Suppose that MAC-VRF in PE-2 learns some {MAC, IP} =
pair &nbsp;{X, Y} &nbsp;locally from the Leaf CE-1 and advertises this pai=
r in the EVPN MAC/IP Advertisement route. With the &#8220;two RTs&#8221; s=
cheme this route will be accepted by the MAC-VRF in PE-1 but
 it will not be accepted by the MAC-VRF in PE3. As a consequence:<o:p></o:=
p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 lev=
el1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span styl=
e=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>MAC-VRF in PE-1 will know=
 that this pair has been learned from the &#8220;blue&#8221; all-active MH=
 ES, and therefore can decide to send locally received unicast frames with=
 destination MAC address X to PE-3 using the corresponding
 &#8220;aliasing label&#8221;. No other labels will be included in the EVN=
 encapsulation of such &nbsp;frames because they are received from the Roo=
t AC. &nbsp;<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 lev=
el1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span styl=
e=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>MAC-VRF in PE-3 will not =
know anything about MAC address X, therefore, when it receives an EVPN-enc=
apsulated frame with this destination,
<b><i>it will treat it as an &#8220;unknown unicast&#8221; and flood it to=
 both Leaf CE-1 (where it should be sent) and to Leaf CE-2 (where it shoul=
d not be sent)</i></b>.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Is this what is really supposed to happen in this s=
cenario? If not, what did I miss in the E-tree EVPN solution?<o:p></o:p></=
p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards, and lots of thanks in advance,<o:p></o:p><=
/p>
<p class=3D"MsoNormal">Sasha<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Office: &#43;972-39266302<o:p></o:p></p>
<p class=3D"MsoNormal">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;972-549266=
302<o:p></o:p></p>
<p class=3D"MsoNormal">Email:&nbsp;&nbsp; Alexander.Vainshtein@ecitele.com=
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<br clear=3D"both">
__________________________________________________________________________=
_<BR>
<BR>
This e-mail message is intended for the recipient only and contains inform=
ation which is <BR>
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece=
ived this <BR>
transmission in error, please inform us by e-mail, phone or fax, and then =
delete the original <BR>
and all copies thereof.<BR>
__________________________________________________________________________=
_<BR>
</body>
</html>

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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, "Ali Sajassi <sajassi@cisco.com> (sajassi@cisco.com)" <sajassi@cisco.com>
CC: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: A question about RFC 8317
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Date: Thu, 20 Dec 2018 17:31:20 +0000
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From: "Luc Andre Burdet (lburdet)" <lburdet@cisco.com>
To: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, "Ali Sajassi (sajassi)" <sajassi@cisco.com>
CC: "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "Samer Salam (ssalam)" <ssalam@cisco.com>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] A question about RFC 8317
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Date: Thu, 20 Dec 2018 17:43:33 +0000
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Subject: Re: [bess] A question about RFC 8317
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From: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
To: "Luc Andre Burdet (lburdet)" <lburdet@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, "Ali Sajassi (sajassi)" <sajassi@cisco.com>
CC: "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "Samer Salam (ssalam)" <ssalam@cisco.com>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] A question about RFC 8317
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Subject: Re: [bess] A question about RFC 8317
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
CC: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "jorge.rabadan@nokia.com" <jorge.rabadan@nokia.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: A question about RFC 8317
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Date: Thu, 20 Dec 2018 17:52:05 +0000
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Subject: Re: [bess] A question about RFC 8317
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-bum-procedure-updates
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-bum-procedure-updates
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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>, "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "Luc Andre Burdet (lburdet)" <lburdet@cisco.com>
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Thread-Topic: [bess] A question about RFC 8317
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/kj2MpOL4Hyp8-bH0YBVUvT3XPDM>
Subject: Re: [bess] A question about RFC 8317
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Luc,
Lots of thanks for the comment.
I fully afree that local split horizon rules must be configured in the MAC=
-VRFs in PE2 and PE3 to prevent local leaf-to-leaf forwarding.
I did  not mention it because it was not relevant for the problem with the=
 "two RTs" scheme. According to Jorge, this problem is real, and the "two =
RTs" scheme sgould nit be used in this scenario.

Regards,
Sasha

Thumb typed by Sasha Vainshtein

________________________________
From: Luc Andre Burdet (lburdet) <lburdet@cisco.com>
Sent: Thursday, December 20, 2018 7:43:33 PM
To: Rabadan, Jorge (Nokia - US/Mountain View); Alexander Vainshtein; Ali S=
ajassi (sajassi)
Cc: John E Drake (jdrake@juniper.net); Samer Salam (ssalam); ju1738@att.co=
m; sboutros@vmware.com; bess@ietf.org
Subject: Re: [bess] A question about RFC 8317

Sasha,
I would add only to Jorge=92s response that in your topology below:
=93PE3 would flood anything for which MAC DA is unknown to both local ESes=
.=94
For traffic in the reverse direction (Leaf@PE3 -> Root@PE1) you=92d want t=
o add an administratively configured split-horizon between green and blue =
ACs at PE2 & PE3 because otherwise you may locally switch(or flood) leaf-l=
eaf at PE2/PE3 which should be disallowed.

Regards,
Luc Andr=E9

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Luc Andr=E9 Burdet
lburdet@cisco.com<mailto:lburdet@cisco.com>
Tel: +1 613 254 4814






Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE
Cisco.com<http://www.cisco.com/web/CA/>







From: BESS <bess-bounces@ietf.org> on behalf of "Rabadan, Jorge (Nokia - U=
S/Mountain View)" <jorge.rabadan@nokia.com>
Date: Thursday, December 20, 2018 at 12:32
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, "Ali Sajassi =
(sajassi)" <sajassi@cisco.com>
Cc: "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "Samer Salam=
 (ssalam)" <ssalam@cisco.com>, "ju1738@att.com" <ju1738@att.com>, "sboutro=
s@vmware.com" <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] A question about RFC 8317

Hi Sasha,

What you are explaining is correct.

PE3 would flood anything for which MAC DA is unknown to both local ESes. T=
hat is normal behavior, only that in this case CE-1=92s MAC will not be le=
arned on PE3 until CE-1 hashes the traffic to PE3 and not only PE2 (which =
will happen if you have a decent number of flows). *Technically speaking*,=
 the E-Tree solution works since you don=92t have leaf-to-leaf communicati=
on. However, I would not use the two RT solution in this scenario since it=
 could create unnecessary flooding to local ESes as you describe.

For this scenario I would always use a single RT per EVI, ingress filterin=
g for unicast (based on the leaf indication on MAC/IP routes), and egress =
filtering for BUM based on leaf label, as explained in RFC8317.

My two cents.

Thank you.
Jorge


From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
Date: Thursday, December 20, 2018 at 12:30 PM
To: "Ali Sajassi <sajassi@cisco.com> (sajassi@cisco.com)" <sajassi@cisco.c=
om>
Cc: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@junip=
er.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutro=
s@vmware.com" <sboutros@vmware.com>, "Rabadan, Jorge (Nokia - US/Mountain =
View)" <jorge.rabadan@nokia.com>, "bess@ietf.org" <bess@ietf.org>
Subject: A question about RFC 8317

Ali and all,
I have read RFC 8317<https://tools.ietf.org/html/rfc8317>, and I would lik=
e to clarify a question dealing with Leaf ACs of an EVPN-based E-Tree serv=
ice on All-Active Multi-Homed Ethernet Segments (MH ES).

The reference model for my question is shown in the Embedded diagram below=
.


[cid:image002.png@01D49865.895588B0]

It shows an EVPN E-tree service with one Root customer site and two leaf c=
ustomer sites, where each Leaf CE is dual-homed to the same pair of PEs us=
ing two different All-Active multi-homed Ethernet Segments.

Suppose that the scheme with two RTs (one identifying the Root site and th=
e other identifying the Leaf sites) is used as described in 4.3.1.

Suppose also that each MAC-VRF uses per MAC-VRF label assignment as define=
d in section 9.2.1 of RFC 7432, i.e., advertises exactly one EVPN applicat=
ion label that identifies it as the Egress MAC-VRF, while the disposition =
of the received Ethernet frame within this MAC-VRF is based on the destina=
tion MAC address. In this case the per MAC-VRF label can be also used as t=
he =93aliasing=94 label in the per EVI EAD route.

PE-1 will receive and accept per EVI EAD routes for both MH ES for PE-2 an=
d PE-3 with the corresponding =93aliasing=94 labels.

Suppose that MAC-VRF in PE-2 learns some {MAC, IP} pair  {X, Y}  locally f=
rom the Leaf CE-1 and advertises this pair in the EVPN MAC/IP Advertisemen=
t route. With the =93two RTs=94 scheme this route will be accepted by the =
MAC-VRF in PE-1 but it will not be accepted by the MAC-VRF in PE3. As a co=
nsequence:

-          MAC-VRF in PE-1 will know that this pair has been learned from =
the =93blue=94 all-active MH ES, and therefore can decide to send locally =
received unicast frames with destination MAC address X to PE-3 using=20the=
 corresponding =93aliasing label=94. No other labels will be included in t=
he EVN encapsulation of such  frames because they are received from the Ro=
ot AC.

-          MAC-VRF in PE-3 will not know anything about MAC address X, the=
refore, when it receives an EVPN-encapsulated frame with this destination,=
 it will treat it as an =93unknown unicast=94 and flood it to both Leaf CE=
-1 (where it should be sent) and to Leaf CE-2 (where it should not be sent=
).

Is this what is really supposed to happen in this scenario? If not, what d=
id I miss in the E-tree EVPN solution?

Regards, and lots of thanks in advance,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com


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--_000_AM0PR03MB3828D05165673CE99839521B9DB80AM0PR03MB3828eurp_
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<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Luc, <br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Lots of thanks for the comment. <br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
I fully afree that local split horizon rules must be configured in the MAC=
-VRFs in PE2 and PE3 to prevent local leaf-to-leaf forwarding.
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
I did&nbsp; not mention it because it was not relevant for the problem wit=
h the &quot;two RTs&quot; scheme. According to Jorge, this problem is real=
, and the &quot;two RTs&quot; scheme sgould nit be used in this scenario.
<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Regards, <br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Sasha <br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Thumb typed by Sasha Vainshtein</div>
<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" c=
olor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Luc Andre Burdet (l=
burdet) &lt;lburdet@cisco.com&gt;<br>
<b>Sent:</b> Thursday, December 20, 2018 7:43:33 PM<br>
<b>To:</b> Rabadan, Jorge (Nokia - US/Mountain View); Alexander Vainshtein=
; Ali Sajassi (sajassi)<br>
<b>Cc:</b> John E Drake (jdrake@juniper.net); Samer Salam (ssalam); ju1738=
@att.com; sboutros@vmware.com; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] A question about RFC 8317</font>
<div>&nbsp;</div>
</div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">Sasha,=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">I woul=
d add only to Jorge=92s response that in your topology below:</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">=93</s=
pan><span style=3D"font-size:10.5pt; font-family:Consolas">PE3 would flood=
 anything for which MAC DA is unknown to both local ESes.</span><span lang=
=3D"EN-US" style=3D"color:#1F4E79">=94</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">For tr=
affic in the reverse direction (Leaf@PE3 -&gt; Root@PE1) you=92d want to a=
dd an administratively configured split-horizon between green and blue ACs=
 at PE2 &amp; PE3 because otherwise you may locally
 switch(or flood) leaf-leaf at PE2/PE3 which should be disallowed.</span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">&nbsp;=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">Regard=
s,</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">Luc An=
dr=E9</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">&nbsp;=
</span></p>
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span></b><span style=3D"color:black"></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"mailto:lburd=
et@cisco.com">lburdet@cisco.com</a></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">Tel:&nbsp;<b>&#43;1 613=
 254 4814</b></span></p>
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<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"http://www.c=
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">&nbsp;=
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F4E79">&nbsp;=
</span></p>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0=
cm 0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt; color:black">Fr=
om: </span>
</b><span style=3D"font-size:12.0pt; color:black">BESS &lt;bess-bounces@ie=
tf.org&gt; on behalf of &quot;Rabadan, Jorge (Nokia - US/Mountain View)&qu=
ot; &lt;jorge.rabadan@nokia.com&gt;<br>
<b>Date: </b>Thursday, December 20, 2018 at 12:32<br>
<b>To: </b>Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.com&gt;, =
&quot;Ali Sajassi (sajassi)&quot; &lt;sajassi@cisco.com&gt;<br>
<b>Cc: </b>&quot;John E Drake (jdrake@juniper.net)&quot; &lt;jdrake@junipe=
r.net&gt;, &quot;Samer Salam (ssalam)&quot; &lt;ssalam@cisco.com&gt;, &quo=
t;ju1738@att.com&quot; &lt;ju1738@att.com&gt;, &quot;sboutros@vmware.com&q=
uot; &lt;sboutros@vmware.com&gt;, &quot;bess@ietf.org&quot; &lt;bess@ietf.=
org&gt;<br>
<b>Subject: </b>Re: [bess] A question about RFC 8317</span></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">Hi Sasha,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">What you are explaining is correct.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">PE3 would flood anything for which MAC DA is unknown to both local ESe=
s. That is normal behavior, only that in this case CE-1=92s MAC will not b=
e learned on PE3
<u>until CE-1 hashes the traffic to PE3 and not only PE2</u> (which will h=
appen if you have a decent number of flows). *<b>Technically speaking</b>*=
, the E-Tree solution works since you don=92t have leaf-to-leaf communicat=
ion. However, I would not use the two
 RT solution in this scenario since it could create unnecessary flooding t=
o local ESes as you describe.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">For this scenario I would always use a single RT=20per EVI, ingress fi=
ltering for unicast (based on the leaf indication on MAC/IP routes), and e=
gress filtering for BUM based on leaf label,
 as explained in RFC8317.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">My two cents.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">Thank you.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">Jorge</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0=
cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font=
-size:12.0pt; color:black">From:
</span></b><span style=3D"font-size:12.0pt; color:black">Alexander Vainsht=
ein &lt;Alexander.Vainshtein@ecitele.com&gt;<br>
<b>Date: </b>Thursday, December 20, 2018 at 12:30 PM<br>
<b>To: </b>&quot;Ali Sajassi &lt;sajassi@cisco.com&gt; (sajassi@cisco.com)=
&quot; &lt;sajassi@cisco.com&gt;<br>
<b>Cc: </b>&quot;Samer Salam (ssalam)&quot; &lt;ssalam@cisco.com&gt;, &quo=
t;John E Drake (jdrake@juniper.net)&quot; &lt;jdrake@juniper.net&gt;, &quo=
t;ju1738@att.com&quot; &lt;ju1738@att.com&gt;, &quot;sboutros@vmware.com&q=
uot; &lt;sboutros@vmware.com&gt;, &quot;Rabadan, Jorge (Nokia - US/Mountai=
n View)&quot; &lt;jorge.rabadan@nokia.com&gt;,
 &quot;bess@ietf.org&quot; &lt;bess@ietf.org&gt;<br>
<b>Subject: </b>A question about RFC 8317</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Ali and all,</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">I have read <a href=3D=
"https://tools.ietf.org/html/rfc8317">
RFC 8317</a>, and I would like to clarify=20a question dealing with Leaf A=
Cs of an EVPN-based E-Tree service on All-Active Multi-Homed Ethernet Segm=
ents (MH ES).</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">The reference model fo=
r my question is shown in the Embedded diagram below.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt"><img border=3D"=
0" width=3D"540" height=3D"620" id=3D"_x0000_i1025" src=3D"cid:image002.pn=
g@01D49861.9D5D15C0" alt=3D"cid:image002.png@01D49865.895588B0" style=3D"w=
idth:5.625in; height:6.4583in"></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">It shows an EVPN E-tre=
e service with one Root customer site and two leaf customer sites, where e=
ach Leaf CE is dual-homed to the same pair of PEs using two different All-=
Active multi-homed Ethernet Segments.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suppose that the schem=
e with two RTs (one identifying the Root site and the other identifying th=
e Leaf sites) is used as described in 4.3.1.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suppose also that each=
 MAC-VRF uses per MAC-VRF label assignment as defined in section 9.2.1 of =
RFC 7432, i.e., advertises exactly one EVPN application label that identif=
ies it as the Egress MAC-VRF, while the
 disposition of the received Ethernet frame within this MAC-VRF is based o=
n the destination MAC address. In this case the per MAC-VRF label can be a=
lso used as the =93aliasing=94 label in the per EVI EAD route.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">PE-1 will receive and =
accept per EVI EAD routes for both MH ES for PE-2 and PE-3 with the corres=
ponding =93aliasing=94 labels.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suppose that MAC-VRF i=
n PE-2 learns some {MAC, IP} pair &nbsp;{X, Y} &nbsp;locally from the Leaf=
 CE-1 and advertises this pair in the EVPN MAC/IP Advertisement route. Wit=
h the =93two RTs=94 scheme this route will be accepted
 by the MAC-VRF in PE-1 but it will not be accepted by the MAC-VRF in PE3.=
 As a consequence:</p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt; text-indent:-18=
.0pt"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times New Roman&qu=
ot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span>MAC-VRF in PE-1 will know that this pair has been learned fr=
om the =93blue=94 all-active MH ES, and therefore can decide to send local=
ly received unicast frames with destination MAC address X to PE-3 using th=
e corresponding =93aliasing label=94. No other
 labels will be included in the EVN encapsulation of such &nbsp;frames bec=
ause they are received from the Root AC. &nbsp;</p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt; text-indent:-18=
.0pt"><span style=3D"">-<span style=3D"font:7.0pt=20&quot;Times New Roman&=
quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span>MAC-VRF in PE-3 will not know anything about MAC address X, =
therefore, when it receives an EVPN-encapsulated frame with this destinati=
on,
<b><i>it will treat it as an =93unknown unicast=94 and flood it to both Le=
af CE-1 (where it should be sent) and to Leaf CE-2 (where it should not be=
 sent)</i></b>.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Is this what is really=
 supposed to happen in this scenario? If not, what did I miss in the E-tre=
e EVPN solution?</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Regards, and lots of t=
hanks in advance,</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Sasha</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Office: &#43;972-39266=
302</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Cell:&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp; &#43;972-549266302</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Email:&nbsp;&nbsp; Ale=
xander.Vainshtein@ecitele.com</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><br>
__________________________________________________________________________=
_<br>
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This e-mail message is intended for the recipient only and contains inform=
ation which is
<br>
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece=
ived this
<br>
transmission in error, please inform us by e-mail, phone or fax, and then =
delete the original
<br>
and all copies thereof.<br>
__________________________________________________________________________=
_<br>
<br>
<br>
</p>
</div>
</div>
<br clear=3D"both">
__________________________________________________________________________=
_<BR>
<BR>
This e-mail message is intended for the recipient only and contains inform=
ation which is <BR>
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece=
ived this <BR>
transmission in error, please inform us by e-mail, phone or fax, and then =
delete the original <BR>
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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
CC: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "jorge.rabadan@nokia.com" <jorge.rabadan@nokia.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: A question about RFC 8317
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/YNAd8DtniUJ12Y6NL7HnFjfh-EA>
Subject: Re: [bess] A question about RFC 8317
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Ali,
Lots of thanks for a prompt response.
I fully agree that tbe use case I've described can be addressed by the gen=
egal techniques of RFC 8317.

I only wanted to u dersrand applicability of fbe "two RTs" scheme, and bot=
h Jorge and you confifm that it would result in undesirable behavior in th=
is use case.

Regards,
Thumb typed by Sasha Vainshtein

________________________________
From: Ali Sajassi (sajassi) <sajassi@cisco.com>
Sent: Thursday, December 20, 2018 7:52:05 PM
To: Alexander Vainshtein
Cc: Samer Salam (ssalam); John E Drake (jdrake@juniper.net); ju1738@att.co=
m; sboutros@vmware.com; jorge.rabadan@nokia.com; bess@ietf.org
Subject: Re: A question about RFC 8317

Hi Sasha,

The use case that you have described below is a legitimate use case and if=
 we look at what happens in RFC 7432 baseline, there is no flooding there =
because MAC addresses among multi-homing PEs get synch=92d up and thus eve=
n a PE in the all-active multi-homing group doesn=92t receive a flow from =
a locally connected CE, the frames destined toward that CE will not get fl=
ooded. So, we should expect the same behavior for the E-TREE. We do get th=
e same behavior from E-TREE (RFC 8317) by using the solution described sec=
tion 4 which is a comprehensive solution that works for both scenarios 1 &=
 2. It uses ingress filtering for unicast traffic and egress filtering for=
 BUM traffic while still using a single Route Target just like RFC 7432.

The use of two RTs in scenario-1, was intended to describe a very limited =
use case where no communications is needed among leaf PEs (e.g., Single Ho=
ming or Single-Active). However, in case of All-Active MH, we do need comm=
unications among leaf PEs and thus we should use the solution described in=
 section 4.

Cheers,
Ali

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
Date: Thursday, December 20, 2018 at 3:30 AM
To: Cisco Employee <sajassi@cisco.com>
Cc: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@junip=
er.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutro=
s@vmware.com" <sboutros@vmware.com>, "jorge.rabadan@nokia.com" <jorge.raba=
dan@nokia.com>, "bess@ietf.org" <bess@ietf.org>
Subject: A question about RFC 8317

Ali and all,
I have read RFC 8317<https://tools.ietf.org/html/rfc8317>, and I would lik=
e to clarify a question dealing with Leaf ACs of an EVPN-based E-Tree serv=
ice on All-Active Multi-Homed Ethernet Segments (MH ES).

The reference model for my question is shown in the Embedded diagram below=
.


[cid:image002.png@01D49865.895588B0]

It shows an EVPN E-tree service with one Root customer site and two leaf c=
ustomer sites, where each Leaf CE is dual-homed to the same pair of PEs us=
ing two different All-Active multi-homed Ethernet Segments.

Suppose that the scheme with two RTs (one identifying the Root site and th=
e other identifying the Leaf sites) is used as described in 4.3.1.

Suppose also that each MAC-VRF uses per MAC-VRF label assignment as define=
d in section 9.2.1 of RFC 7432, i.e., advertises exactly one EVPN applicat=
ion label that identifies it as the Egress MAC-VRF, while the disposition =
of the received Ethernet frame within this MAC-VRF is based on the destina=
tion MAC address. In this case the per MAC-VRF label can be also used as t=
he =93aliasing=94 label in the per EVI EAD route.

PE-1 will receive and accept per EVI EAD routes for both MH ES for PE-2 an=
d PE-3 with the corresponding =93aliasing=94 labels.

Suppose that MAC-VRF in PE-2 learns some {MAC, IP} pair  {X, Y}  locally f=
rom the Leaf CE-1 and advertises this pair in the EVPN MAC/IP Advertisemen=
t route. With the =93two RTs=94 scheme this route will be accepted by the =
MAC-VRF in PE-1 but it will not be accepted by the MAC-VRF in PE3. As a co=
nsequence:

  *   MAC-VRF in PE-1 will know that this pair has been learned from the =93=
blue=94 all-active MH ES, and therefore can decide to send locally receive=
d unicast frames with destination MAC address X to PE-3 using the correspo=
nding =93aliasing label=94. No other labels will be included in the EVN en=
capsulation of such  frames because they are received from the Root AC.
  *   MAC-VRF in PE-3 will not know anything about MAC address X, therefor=
e, when it receives an EVPN-encapsulated frame with this destination, it w=
ill treat it as an =93unknown unicast=94 and flood it to both Leaf CE-1 (w=
here it should be sent) and to Leaf CE-2 (where it should not be sent).

Is this what is really supposed to happen in this scenario? If not, what d=
id I miss in the E-tree EVPN solution?

Regards, and lots of thanks in advance,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com


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Ali,<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Lots of thanks for a prompt response.<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
I fully agree that tbe use case I've described can be addressed by the gen=
egal techniques of RFC 8317.<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
I only wanted to u dersrand applicability of fbe &quot;two RTs&quot; schem=
e, and both Jorge and you confifm that it would result in undesirable beha=
vior in this use case.<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Regards,<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Thumb typed by Sasha Vainshtein</div>
<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" c=
olor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Ali Sajassi (sajass=
i) &lt;sajassi@cisco.com&gt;<br>
<b>Sent:</b> Thursday, December 20, 2018 7:52:05 PM<br>
<b>To:</b> Alexander Vainshtein<br>
<b>Cc:</b> Samer Salam (ssalam); John E Drake (jdrake@juniper.net); ju1738=
@att.com; sboutros@vmware.com; jorge.rabadan@nokia.com; bess@ietf.org<br>
<b>Subject:</b> Re: A question about RFC 8317</font>
<div>&nbsp;</div>
</div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Hi Sasha,</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">The use case that you have described below is a leg=
itimate use case and if we look at what happens in RFC 7432 baseline, ther=
e is no flooding there because MAC addresses among multi-homing PEs get sy=
nch=92d up and thus even a PE in the all-active
 multi-homing group doesn=92t receive a flow from a locally connected CE, =
the frames destined toward that CE will not get flooded. So, we should exp=
ect the same behavior for the E-TREE. We do get the same behavior from E-T=
REE (RFC 8317) by using the solution
 described section 4 which is a comprehensive solution that works for both=
 scenarios 1 &amp; 2. It uses ingress filtering for unicast traffic and eg=
ress filtering for BUM traffic while still using a single Route Target jus=
t like RFC 7432.
</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">The use of two RTs in scenario-1, was intended to d=
escribe a very limited use case where no communications is needed among le=
af PEs (e.g., Single Homing or Single-Active). However, in case of All-Act=
ive MH, we do need communications among
 leaf PEs and thus we should use the solution described in section 4.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Cheers,</p>
<p class=3D"MsoNormal">Ali</p>
<p class=3D"MsoNormal">&nbsp;</p>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0=
in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt; color:black">Fr=
om: </span>
</b><span style=3D"font-size:12.0pt; color:black">Alexander Vainshtein &lt=
;Alexander.Vainshtein@ecitele.com&gt;<br>
<b>Date: </b>Thursday, December 20, 2018 at 3:30 AM<br>
<b>To: </b>Cisco Employee &lt;sajassi@cisco.com&gt;<br>
<b>Cc: </b>&quot;Samer Salam (ssalam)&quot; &lt;ssalam@cisco.com&gt;, &quo=
t;John E Drake (jdrake@juniper.net)&quot; &lt;jdrake@juniper.net&gt;, &quo=
t;ju1738@att.com&quot; &lt;ju1738@att.com&gt;, &quot;sboutros@vmware.com&q=
uot; &lt;sboutros@vmware.com&gt;, &quot;jorge.rabadan@nokia.com&quot; &lt;=
jorge.rabadan@nokia.com&gt;, &quot;bess@ietf.org&quot;
 &lt;bess@ietf.org&gt;<br>
<b>Subject: </b>A question about RFC 8317</span></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
<p class=3D"MsoNormal">Ali and all,</p>
<p class=3D"MsoNormal">I have read <a href=3D"https://tools.ietf.org/html/=
rfc8317">RFC 8317</a>, and I would like to clarify a question dealing with=
 Leaf ACs of an EVPN-based E-Tree service on All-Active Multi-Homed Ethern=
et Segments (MH ES).</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">The reference model for my question is shown in the=
 Embedded diagram below.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoListParagraph"><img border=3D"0" width=3D"540" height=3D"62=
0" id=3D"_x0000_i1025" src=3D"cid:image001.png@01D49849.A8776AE0" alt=3D"c=
id:image002.png@01D49865.895588B0" style=3D"width:5.625in; height:6.4583in=
"></p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">It shows an EVPN E-tree service with one Root custo=
mer site and two leaf customer sites, where each Leaf CE is dual-homed to =
the same pair of PEs using two different All-Active multi-homed Ethernet S=
egments.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Suppose that the scheme with two RTs (one identifyi=
ng the Root site and the other identifying the Leaf sites) is used as desc=
ribed in 4.3.1.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Suppose also that each MAC-VRF uses per MAC-VRF lab=
el assignment as defined in section 9.2.1 of RFC 7432, i.e., advertises ex=
actly one EVPN application label that identifies it as the Egress MAC-VRF,=
 while the disposition of the received
 Ethernet frame within this MAC-VRF is based on the destination MAC addres=
s. In this case the per MAC-VRF label can be also used as the =93aliasing=94=
 label in the per EVI EAD route.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">PE-1 will receive and accept per EVI EAD routes for=
 both MH ES for PE-2 and PE-3 with the corresponding =93aliasing=94 labels=
.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Suppose that MAC-VRF in PE-2 learns some {MAC, IP} =
pair &nbsp;{X, Y} &nbsp;locally from the Leaf CE-1 and advertises this pai=
r in the EVPN MAC/IP Advertisement route. With the =93two RTs=94 scheme th=
is route will be accepted by the MAC-VRF in PE-1 but
 it will not be accepted by the MAC-VRF in PE3. As a consequence:</p>
<ul type=3D"disc" style=3D"margin-top:0in">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in">MAC-VRF in PE-1 w=
ill know that this pair has been learned from the =93blue=94 all-active MH=
 ES, and therefore can decide to send locally received unicast frames with=
 destination MAC address X to PE-3 using the
 corresponding =93aliasing label=94. No other labels will be included in t=
he EVN encapsulation of such &nbsp;frames because they are received from t=
he Root AC. &nbsp;</li><li class=3D"MsoListParagraph" style=3D"margin-left=
:0in">MAC-VRF in PE-3 will not know anything about MAC address X, therefor=
e, when it receives an EVPN-encapsulated frame with this destination,
<b><i>it will treat it as an =93unknown unicast=94 and flood it to both Le=
af CE-1 (where it should be sent) and to Leaf CE-2 (where it should not be=
 sent)</i></b>.</li></ul>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Is this what is really supposed to happen in this s=
cenario? If not, what did I miss in the E-tree EVPN solution?</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Regards, and lots of thanks in advance,</p>
<p class=3D"MsoNormal">Sasha</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Office: &#43;972-39266302</p>
<p class=3D"MsoNormal">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;972-549266=
302</p>
<p class=3D"MsoNormal">Email:&nbsp;&nbsp; Alexander.Vainshtein@ecitele.com=
</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><br>
__________________________________________________________________________=
_<br>
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This e-mail message is intended for the recipient only and contains inform=
ation which is
<br>
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece=
ived this
<br>
transmission in error, please inform us by e-mail, phone or fax, and then =
delete the original
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</p>
</div>
</div>
<br clear=3D"both">
__________________________________________________________________________=
_<BR>
<BR>
This e-mail message is intended for the recipient only and contains inform=
ation which is <BR>
CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece=
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transmission in error, please inform us by e-mail, phone or fax, and then =
delete the original <BR>
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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "Ali Sajassi <sajassi@cisco.com> (sajassi@cisco.com)" <sajassi@cisco.com>,  "Rabadan, Jorge (Nokia - US/Mountain View)" <jorge.rabadan@nokia.com>
CC: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@juniper.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutros@vmware.com" <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: A question about RFC 8317
Thread-Index: AdSYUr9cSCgYcdt7R1u6vcshLnORdAAP3KGAABufoYc=
Date: Fri, 21 Dec 2018 07:42:14 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/qRfvMhTVWx_TgwSLNHvua2PPRtI>
Subject: Re: [bess] A question about RFC 8317
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Jorge,
Lots of thanks for a prompt response.
My conclusion js tbat the "two RTs" scheme should be used with special car=
e in E-tree solutions. This was not my impression from the first reading o=
f 8317.

Since the "two RTs" scheme is very popular in hub-and-spoke" solutiobs for=
 IP VPN, the fact that it is not the universal answer in EVPN E-Tree deser=
ves some expla ation IMHO- but I do not see how this can be done in IETF.

Thumb typed by Sasha Vainshtein

________________________________
From: Rabadan, Jorge (Nokia - US/Mountain View) <jorge.rabadan@nokia.com>
Sent: Thursday, December 20, 2018 7:31:20 PM
To: Alexander Vainshtein; Ali Sajassi <sajassi@cisco.com> (sajassi@cisco.c=
om)
Cc: Samer Salam (ssalam); John E Drake (jdrake@juniper.net); ju1738@att.co=
m; sboutros@vmware.com; bess@ietf.org
Subject: Re: A question about RFC 8317

Hi Sasha,

What you are explaining is correct.

PE3 would flood anything for which MAC DA is unknown to both local ESes. T=
hat is normal behavior, only that in this case CE-1=92s MAC will not be le=
arned on PE3 until CE-1 hashes the traffic to PE3 and not only PE2 (which =
will happen if you have a decent number of flows). *Technically speaking*,=
 the E-Tree solution works since you don=92t have leaf-to-leaf communicati=
on. However, I would not use the two RT solution in this scenario since it=
 could create unnecessary flooding to local ESes as you describe.

For this scenario I would always use a single RT per EVI, ingress filterin=
g for unicast (based on the leaf indication on MAC/IP routes), and egress =
filtering for BUM based on leaf label, as explained in RFC8317.

My two cents.

Thank you.
Jorge


From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
Date: Thursday, December 20, 2018 at 12:30 PM
To: "Ali Sajassi <sajassi@cisco.com> (sajassi@cisco.com)" <sajassi@cisco.c=
om>
Cc: "Samer Salam (ssalam)" <ssalam@cisco.com>, "John E Drake (jdrake@junip=
er.net)" <jdrake@juniper.net>, "ju1738@att.com" <ju1738@att.com>, "sboutro=
s@vmware.com" <sboutros@vmware.com>, "Rabadan, Jorge (Nokia - US/Mountain =
View)" <jorge.rabadan@nokia.com>, "bess@ietf.org" <bess@ietf.org>
Subject: A question about RFC 8317

Ali and all,
I have read RFC 8317<https://tools.ietf.org/html/rfc8317>, and I would lik=
e to clarify a question dealing with Leaf ACs of an EVPN-based E-Tree serv=
ice on All-Active Multi-Homed Ethernet Segments (MH ES).

The reference model for my question is shown in the Embedded diagram below=
.


[cid:image002.png@01D49865.895588B0]

It shows an EVPN E-tree service with one Root customer site and two leaf c=
ustomer sites, where each Leaf CE is dual-homed to the same pair of PEs us=
ing two different All-Active multi-homed Ethernet Segments.

Suppose that the scheme with two RTs (one identifying the Root site and th=
e other identifying the Leaf sites) is used as described in 4.3.1.

Suppose also that each MAC-VRF uses per MAC-VRF label assignment as define=
d in section 9.2.1 of RFC 7432, i.e., advertises exactly one EVPN applicat=
ion label that identifies it as the Egress MAC-VRF, while the disposition =
of the received Ethernet frame within this MAC-VRF is based on the destina=
tion MAC address. In this case the per MAC-VRF label can be also used as t=
he =93aliasing=94 label in the per EVI EAD route.

PE-1 will receive and accept per EVI EAD routes for both MH ES for PE-2 an=
d PE-3 with the corresponding =93aliasing=94 labels.

Suppose that MAC-VRF in PE-2 learns some {MAC, IP} pair  {X, Y}  locally f=
rom the Leaf CE-1 and advertises this pair in the EVPN MAC/IP Advertisemen=
t route. With the =93two RTs=94 scheme this route will be accepted by the =
MAC-VRF in PE-1 but it will not be accepted by the MAC-VRF in PE3. As a co=
nsequence:

-          MAC-VRF in PE-1 will know that this pair has been learned from =
the =93blue=94 all-active MH ES, and therefore can decide to send locally =
received unicast frames with destination MAC address X to PE-3 using the c=
orresponding =93aliasing label=94. No other labels will be included in the=
 EVN encapsulation of such  frames because they are received from the Root=
 AC.

-          MAC-VRF in PE-3 will not know=20anything about MAC address X, t=
herefore, when it receives an EVPN-encapsulated frame with this destinatio=
n, it will treat it as an =93unknown unicast=94 and flood it to both Leaf =
CE-1 (where it should be sent) and to Leaf CE-2 (where it should not be se=
nt).

Is this what is really supposed to happen in this scenario? If not, what d=
id I miss in the E-tree EVPN solution?

Regards, and lots of thanks in advance,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com


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__________________________________________________________________________=
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CONFIDENTIAL and which may be proprietary to ECI Telecom. If you have rece=
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transmission in error, please inform us by e-mail, phone or fax, and then =
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<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Jorge,<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Lots of thanks for a prompt response.<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
My conclusion js tbat the &quot;two RTs&quot; scheme should be used with s=
pecial care in E-tree solutions. This was not my impression from the first=
 reading of 8317.
<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Since the &quot;two RTs&quot; scheme is very popular in hub-and-spoke&quot=
; solutiobs for IP VPN, the fact that it is not the universal answer in EV=
PN E-Tree deserves some expla ation IMHO- but I do not see how this can be=
 done in IETF.<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
<div dir=3D"auto" style=3D"direction:ltr; margin:0; padding:0; font-family=
:sans-serif; font-size:11pt; color:black">
Thumb typed by Sasha Vainshtein</div>
<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" c=
olor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Rabadan, Jorge (Nok=
ia - US/Mountain View) &lt;jorge.rabadan@nokia.com&gt;<br>
<b>Sent:</b> Thursday, December 20, 2018 7:31:20 PM<br>
<b>To:</b> Alexander Vainshtein; Ali Sajassi &lt;sajassi@cisco.com&gt; (sa=
jassi@cisco.com)<br>
<b>Cc:</b> Samer Salam (ssalam); John E Drake (jdrake@juniper.net); ju1738=
@att.com; sboutros@vmware.com; bess@ietf.org<br>
<b>Subject:</b> Re: A question about RFC 8317</font>
<div>&nbsp;</div>
</div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">Hi Sasha,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">What you are explaining is correct.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">PE3 would flood anything for which MAC DA is unknown to both local ESe=
s. That is normal behavior, only that in this case CE-1=92s MAC will not b=
e learned on PE3
<u>until CE-1 hashes the traffic to PE3 and not only PE2</u> (which will h=
appen if you have a decent number of flows). *<b>Technically speaking</b>*=
, the E-Tree solution works since you don=92t have leaf-to-leaf communicat=
ion. However, I would not use the two
 RT solution in this scenario since it could create unnecessary flooding t=
o local ESes as you describe.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">For this scenario I would always use a single RT per EVI, ingress filt=
ering for unicast (based on the leaf indication on MAC/IP routes), and egr=
ess filtering for BUM based on leaf label,
 as explained in RFC8317.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">My two cents.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">Thank you.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">Jorge</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt; font-family:Consol=
as">&nbsp;</span></p>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0=
cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b><span style=3D"font=
-size:12.0pt; color:black">From:
</span></b><span style=3D"font-size:12.0pt; color:black">Alexander Vainsht=
ein &lt;Alexander.Vainshtein@ecitele.com&gt;<br>
<b>Date: </b>Thursday, December 20, 2018 at 12:30 PM<br>
<b>To: </b>&quot;Ali Sajassi &lt;sajassi@cisco.com&gt; (sajassi@cisco.com)=
&quot; &lt;sajassi@cisco.com&gt;<br>
<b>Cc: </b>&quot;Samer Salam (ssalam)&quot; &lt;ssalam@cisco.com&gt;, &quo=
t;John E Drake (jdrake@juniper.net)&quot; &lt;jdrake@juniper.net&gt;, &quo=
t;ju1738@att.com&quot; &lt;ju1738@att.com&gt;, &quot;sboutros@vmware.com&q=
uot; &lt;sboutros@vmware.com&gt;, &quot;Rabadan, Jorge (Nokia - US/Mountai=
n View)&quot; &lt;jorge.rabadan@nokia.com&gt;,
 &quot;bess@ietf.org&quot; &lt;bess@ietf.org&gt;<br>
<b>Subject: </b>A question about RFC 8317</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Ali and all,</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">I have read <a href=3D=
"https://tools.ietf.org/html/rfc8317">
RFC 8317</a>, and I would like to clarify a question dealing with Leaf ACs=
 of an EVPN-based E-Tree service on All-Active Multi-Homed Ethernet Segmen=
ts (MH ES).</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">The reference model fo=
r my question is shown in the Embedded diagram below.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt"><img border=3D"=
0" width=3D"540" height=3D"620" id=3D"_x0000_i1025" src=3D"cid:image001.pn=
g@01D49892.31DC5F00" alt=3D"cid:image002.png@01D49865.895588B0" style=3D"w=
idth:5.625in; height:6.4583in"></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">It shows an EVPN E-tre=
e service with one Root customer site and two leaf customer sites, where e=
ach Leaf CE is dual-homed to the same pair of PEs using two different All-=
Active multi-homed Ethernet Segments.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suppose that the schem=
e with two RTs (one identifying the Root site and the other identifying th=
e Leaf sites) is used as described in 4.3.1.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suppose also that each=
 MAC-VRF uses per MAC-VRF label assignment as defined in section 9.2.1 of =
RFC 7432, i.e., advertises exactly one EVPN application label that identif=
ies it as the Egress MAC-VRF, while the
 disposition of the received Ethernet frame within this MAC-VRF is based o=
n the destination MAC address. In this case the per MAC-VRF label can be a=
lso used as the =93aliasing=94 label in the per EVI EAD route.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">PE-1 will receive and =
accept per EVI EAD routes for both MH ES for PE-2 and PE-3 with the corres=
ponding =93aliasing=94 labels.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Suppose that MAC-VRF i=
n PE-2 learns some {MAC, IP} pair &nbsp;{X, Y} &nbsp;locally from the Leaf=
 CE-1 and advertises this pair in the EVPN MAC/IP Advertisement route. Wit=
h the =93two RTs=94 scheme this route will be accepted
 by the MAC-VRF in PE-1 but it will not be accepted by the MAC-VRF in PE3.=
 As a consequence:</p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt; text-indent:-18=
.0pt"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times New Roman&qu=
ot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span>MAC-VRF in PE-1 will know that this pair has been learned fr=
om the =93blue=94 all-active MH ES, and therefore can decide to send local=
ly received unicast frames with destination MAC address X to PE-3 using th=
e corresponding =93aliasing label=94. No other
 labels will be included in the EVN encapsulation of such &nbsp;frames bec=
ause they are received from the Root AC. &nbsp;</p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt; text-indent:-18=
.0pt"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times New Roman&qu=
ot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span>MAC-VRF in PE-3 will not know anything about MAC address X, =
therefore, when it receives an EVPN-encapsulated frame with this destinati=
on,
<b><i>it will treat it as an =93unknown unicast=94 and flood it to both Le=
af CE-1 (where it should be sent) and to Leaf CE-2 (where it should not be=
 sent)</i></b>.</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Is this what is really=
 supposed to happen in this scenario? If not, what did I miss in the E-tre=
e EVPN solution?</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Regards, and lots of t=
hanks in advance,</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Sasha</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Office: &#43;972-39266=
302</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Cell:&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp; &#43;972-549266302</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Email:&nbsp;&nbsp; Ale=
xander.Vainshtein@ecitele.com</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;</p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><br>
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Subject: Re: [bess] WGLC, IPR and implementation poll for draft-ietf-bess-evpn-bum-procedure-updates
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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           : Preference-based EVPN DF Election
        Authors         : Jorge Rabadan
                          Senthil Sathappan
                          Tony Przygienda
                          Wen Lin
                          John Drake
                          Ali Sajassi
                          Satya Ranjan Mohanty
	Filename        : draft-ietf-bess-evpn-pref-df-03.txt
	Pages           : 15
	Date            : 2018-12-21

Abstract:
   The Designated Forwarder (DF) in Ethernet Virtual Private Networks
   (EVPN) is defined as the PE responsible for sending Broadcast,
   Unknown unicast and Broadcast traffic (BUM) to a multi-homed
   device/network in the case of an all-active multi-homing Ethernet
   Segment (ES), or BUM and unicast in the case of single-active multi-
   homing.

   The DF is selected out of a candidate list of PEs that advertise the
   same Ethernet Segment Identifier (ESI) to the EVPN network, according
   to the Default DF Election algorithm.

   While the Default Algorithm provides an efficient and automated way
   of selecting the DF across different Ethernet Tags in the ES, there
   are some use-cases where a more 'deterministic' and user-controlled
   method is required. At the same time, Service Providers require an
   easy way to force an on-demand DF switchover in order to carry out
   some maintenance tasks on the existing DF or control whether a new
   active PE can preempt the existing DF PE.

   This document proposes an extension to the Default DF election
   procedures so that the above requirements can be met.



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

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-pref-df-03
https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-pref-df-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-pref-df-03


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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A new Request for Comments is now available in online RFC libraries.

        
        RFC 8502

        Title:      L2L3 VPN Multicast MIB 
        Author:     Z. Zhang,
                    H. Tsunoda
        Status:     Standards Track
        Stream:     IETF
        Date:       December 2018
        Mailbox:    zzhang@juniper.net, 
                    tsuno@m.ieice.org
        Pages:      20
        Characters: 40349
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-bess-l2l3-vpn-mcast-mib-16.txt

        URL:        https://www.rfc-editor.org/info/rfc8502

        DOI:        10.17487/RFC8502

This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes two MIB modules that will be used by
other MIB modules for monitoring and/or configuring Layer 2 and Layer
3 Virtual Private Networks that support multicast.

This document is a product of the BGP Enabled Services Working Group of the IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
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The RFC Editor Team
Association Management Solutions, LLC



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A new Request for Comments is now available in online RFC libraries.

        
        RFC 8503

        Title:      BGP/MPLS Layer 3 VPN Multicast 
                    Management Information Base 
        Author:     H. Tsunoda
        Status:     Standards Track
        Stream:     IETF
        Date:       December 2018
        Mailbox:    tsuno@m.ieice.org
        Pages:      57
        Characters: 107060
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-bess-mvpn-mib-12.txt

        URL:        https://www.rfc-editor.org/info/rfc8503

        DOI:        10.17487/RFC8503

This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes managed objects to configure and/or
monitor Multicast communication over IP Virtual Private Networks
(VPNs) supported by the Multiprotocol Label Switching/Border Gateway
Protocol (MPLS/BGP) on a Provider Edge (PE) router.

This document is a product of the BGP Enabled Services Working Group of the IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
memo is unlimited.

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unlimited distribution.


The RFC Editor Team
Association Management Solutions, LLC


