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------=ALIBOUNDARY_36405_529a6940_5b39e456_c7cca--


From nobody Mon Jul  2 07:46:56 2018
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Subject: [Idr] I-D Action: draft-ietf-idr-wide-bgp-communities-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 Inter-Domain Routing WG of the IETF.

        Title           : BGP Community Container Attribute
        Authors         : Robert Raszuk
                          Jeffrey Haas
                          Andrew Lange
                          Bruno Decraene
                          Shane Amante
                          Paul Jakma
	Filename        : draft-ietf-idr-wide-bgp-communities-05.txt
	Pages           : 25
	Date            : 2018-07-02

Abstract:
   Route tagging plays an important role in external BGP [RFC4271]
   relations, in communicating various routing policies between peers.
   It is also a very common best practice among operators to propagate
   various additional information about routes intra-domain.  The most
   common tool used today to attach various information about routes is
   through the use of BGP communities [RFC1997].

   This document defines a new encoding which will enhance and simplify
   what can be accomplished today with the use of BGP communities.  The
   most important addition this specification makes over currently
   defined BGP communities is the ability to specify, carry as well as
   use for execution an operator's defined set of parameters.  It also
   provides an extensible platform for any new community encoding needs
   in the future.



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A diff from the previous version is available at:
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From nobody Mon Jul  2 07:56:36 2018
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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 Inter-Domain Routing WG of the IETF.

        Title           : Methods for Detection and Mitigation of BGP Route Leaks
        Authors         : Kotikalapudi Sriram
                          Alexander Azimov
	Filename        : draft-ietf-idr-route-leak-detection-mitigation-09.txt
	Pages           : 14
	Date            : 2018-07-02

Abstract:
   Problem definition for route leaks and enumeration of types of route
   leaks are provided in RFC 7908.  This document specifies BGP
   enhancements that significantly extend its route-leak detection and
   mitigation capabilities.  The solution involves each participating AS
   setting a route-leak protection (RLP) field in BGP updates.  The RLP
   fields are carried in a new optional transitive attribute, called BGP
   RLP Attribute.  The RLP Attribute helps with detection and mitigation
   of route leaks at ASes downstream from the leaking AS (in the path of
   BGP update).  This is an inter-AS (multi-hop) solution mechanism.
   This solution complements the intra-AS (local AS) route-leak
   avoidance solution that is described in ietf-idr-bgp-open-policy
   draft.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-route-leak-detection-mitigation/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-route-leak-detection-mitigation-09
https://datatracker.ietf.org/doc/html/draft-ietf-idr-route-leak-detection-mitigation-09

A diff from the previous version is available at:
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Please note that it may take a couple of minutes from the time of submission
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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 Inter-Domain Routing WG of the IETF.

        Title           : Dissemination of Flow Specification Rules for L2 VPN
        Authors         : Weiguo Hao
                          Qiandeng Liang
                          James Uttaro
                          Stephane Litkowski
                          Shunwan Zhuang
	Filename        : draft-ietf-idr-flowspec-l2vpn-08.txt
	Pages           : 13
	Date            : 2018-07-02

Abstract:
   This document defines BGP Flow-Spec extension for Ethernet traffic
   filtering in L2 VPN network.  SAFI=134 in [RFC5575] is redefined for
   dissemination traffic filtering information in an L2VPN environment.
   A new subset of component types and extended community also are
   defined.



The IETF datatracker status page for this draft is:
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Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Greetings:=20

=20

This begins a 2 week WG adoption call for
draft-xu-idr-neighbor-autodiscovery (July 2 =A8C July 16). =20

=20

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

=20

The authors of this draft should send their IPR statements in response =
to
this email.  I hope the authors will ihelp their vacationing co-authors =
to
respond by July 7th. =20

=20

The WG should consider the following:=20

1)      Does BGP need to have an autodiscovery mechanism for peers =
within
Data Centers?=20

2)      Does this mechanism work for other deployments?=20

=20

3)      If so, should be passed in BGP Hello message? =20

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=20

=20

4)      Does this interact with any of the LSVR work?=20

=20

I want to thank the authors for their patience while we sorted through =
some
of the WG LC for other drafts.  We decided to wait until some of those
discussion were cleared up prior to starting a new WG Adoption call.

=20

=20

Susan Hares=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>Greetings: =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =A8C July 16).&nbsp; =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscov=
ery/">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscover=
y/</a><o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>The authors of this draft should send their IPR =
statements in response to this email. &nbsp;I hope the authors will =
ihelp their vacationing co-authors to respond by July =
7<sup>th</sup>.&nbsp; <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>The WG =
should consider the following: <o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span style=3D'mso-list:Ignore'>1)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>Does BGP need to have an =
autodiscovery mechanism for peers within Data Centers? <o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span style=3D'mso-list:Ignore'>2)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>Does this mechanism work =
for other deployments? <o:p></o:p></p><p =
class=3DMsoListParagraph><o:p>&nbsp;</o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span style=3D'mso-list:Ignore'>3)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>If so, should be passed =
in BGP Hello message?&nbsp; <o:p></o:p></p><p =
class=3DMsoListParagraph>Or should it be a part of another protocol =
(e.g. LLDP, BFD, etc). <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo1'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>4)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>Does this interact with =
any of the LSVR work? <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>I want to =
thank the authors for their patience while we sorted through some of the =
WG LC for other drafts.&nbsp; We decided to wait until some of those =
discussion were cleared up prior to starting a new WG Adoption =
call.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Susan Hares =
<o:p></o:p></p></div></body></html>
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Subject: [Idr] I-D Action: draft-ietf-idr-segment-routing-te-policy-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Advertising Segment Routing Policies in BGP
        Authors         : Stefano Previdi
                          Clarence Filsfils
                          Dhanendra Jain
                          Paul Mattes
                          Eric Rosen
                          Steven Lin
	Filename        : draft-ietf-idr-segment-routing-te-policy-04.txt
	Pages           : 40
	Date            : 2018-07-02

Abstract:
   This document defines a new BGP SAFI with a new NLRI in order to
   advertise a candidate path of a Segment Routing Policy (SR Policy).
   An SR Policy is a set of candidate paths, each consisting of one or
   more segment lists.  The headend of an SR Policy may learn multiple
   candidate paths for an SR Policy.  Candidate paths may be learned via
   a number of different mechanisms, e.g., CLI, NetConf, PCEP, or BGP.
   This document specifies the way in which BGP may be used to
   distribute candidate paths.  New sub-TLVs for the Tunnel
   Encapsulation Attribute are defined.


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From: "Sriram, Kotikalapudi (Fed)" <kotikalapudi.sriram@nist.gov>
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Thread-Topic: [Idr] I-D Action: draft-ietf-idr-route-leak-detection-mitigation-09.txt
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-route-leak-detection-mitigation-09.txt
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The author teams from the following two drafts...
=20
https://tools.ietf.org/html/draft-ietf-idr-route-leak-detection-mitigation-=
08=20
https://tools.ietf.org/html/draft-ymbk-idr-bgp-eotr-policy-02=20

have combined into one team, and we are happy to report that=20
we've a converged towards a merged solution proposal and have uploaded a ne=
w merged draft:

https://tools.ietf.org/html/draft-ietf-idr-route-leak-detection-mitigation-=
09  =20

We plan to present an update on this in the IDR WG meeting in Montreal.

Sriram

---------------------------------------------------------------------------=
------------------------------------
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : Methods for Detection and Mitigation of BGP Route=
 Leaks
        Authors         : Kotikalapudi Sriram
                          Alexander Azimov
	Filename        : draft-ietf-idr-route-leak-detection-mitigation-09.txt
	Pages           : 14
	Date            : 2018-07-02

Abstract:
   Problem definition for route leaks and enumeration of types of route
   leaks are provided in RFC 7908.  This document specifies BGP
   enhancements that significantly extend its route-leak detection and
   mitigation capabilities.  The solution involves each participating AS
   setting a route-leak protection (RLP) field in BGP updates.  The RLP
   fields are carried in a new optional transitive attribute, called BGP
   RLP Attribute.  The RLP Attribute helps with detection and mitigation
   of route leaks at ASes downstream from the leaking AS (in the path of
   BGP update).  This is an inter-AS (multi-hop) solution mechanism.
   This solution complements the intra-AS (local AS) route-leak
   avoidance solution that is described in ietf-idr-bgp-open-policy
   draft.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-route-leak-detection-mitiga=
tion/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-route-leak-detection-mitigation-=
09
https://datatracker.ietf.org/doc/html/draft-ietf-idr-route-leak-detection-m=
itigation-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-route-leak-detection-mit=
igation-09


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This informational draft ...
https://tools.ietf.org/html/draft-sriram-idr-route-leak-solution-discussion=
-00=20

is a companion to the newly merged route leaks solution draft ...=20
https://tools.ietf.org/html/draft-ietf-idr-route-leak-detection-mitigation-=
09=20

and provides design rationale/discussion.

Your comments welcome.

Sriram

________________________________________
From: internet-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Monday, July 2, 2018 11:32 AM
To: Sriram, Kotikalapudi (Fed)
Subject: New Version Notification for draft-sriram-idr-route-leak-solution-=
discussion-00.txt


A new version of I-D, draft-sriram-idr-route-leak-solution-discussion-00.tx=
t
has been successfully submitted by Kotikalapudi Sriram and posted to the
IETF repository.

Name:           draft-sriram-idr-route-leak-solution-discussion
Revision:       00
Title:          Design Discussion of Route Leaks Solution Methods
Document date:  2018-07-02
Group:          Individual Submission
Pages:          16
URL:            https://tools.ietf.org/html/draft-sriram-idr-route-leak-sol=
ution-discussion-00=20
Abstract:
   This document captures the design rationale of the route leaks
   solution document [draft-ietf-idr-route-leak-detection-mitigation].
   The designers needed to balance many competing factors, and this
   document provides insights into the design questions and their
   resolution.


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Subject: [Idr] What are side effect for having Encap SAFI? can draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before VPN is established?
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Eric, IDR group,

It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tunnel-enc=
aps. But draft-ietf-idr-tunnel-encaps-09 stated that it deprecates the
Encapsulation SAFI.

We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For exa=
mple, a Controller (say RR) can send an update with Encapsulation SAFI to t=
wo end points to trigger a tunnel establishment between them.
What are side effect for having Encap SAFI? Can we preserve it in draft-iet=
f-idr-tunnel-encaps?

Thanks, Linda Dunbar

From: Linda Dunbar
Sent: Friday, June 29, 2018 2:54 PM
To: 'Eric C Rosen' <erosen@juniper.net>; idr@ietf.org; pmohapat@cisco.com; =
erosen@cisco.com; 'draft-ietf-idr-tunnel-encaps@ietf.org' <draft-ietf-idr-t=
unnel-encaps@ietf.org>
Subject: Can draft-ietf-idr-tunnel-encaps-09 trigger tunnel creation before=
 VPN is established?

Eric,

Thank you very much for the reply.
Can draft-ietf-idr-tunnel-encaps-09 trigger tunnel creation before VPN is e=
stablished?
For example, having RR sending down the Encap extended community to both en=
d points of a tunnel? Instead of tunnel's one end point to send to others?

Thank you very much.

Linda Dunbar


From: Eric C Rosen [mailto:erosen@juniper.net]
Sent: Tuesday, June 26, 2018 2:28 PM
To: Linda Dunbar <linda.dunbar@huawei.com<mailto:linda.dunbar@huawei.com>>;=
 idr@ietf.org<mailto:idr@ietf.org>; pmohapat@cisco.com<mailto:pmohapat@cisc=
o.com>; erosen@cisco.com<mailto:erosen@cisco.com>
Subject: Re: [Idr] Questions to RFC5512: Encapsulation sub-TLV and Opaque e=
xtended community to indicate the Encapsulation protocol?

I think it would be better if you looked at draft-ietf-idr-tunnel-encaps in=
stead of RFC 5512.  The draft has passed WG LC, and if it ever gets sent to=
 the IESG, it will obsolete RFC 5512.
On 6/26/2018 1:56 PM, Linda Dunbar wrote:
BGP experts:

If the RFC5512 has "distinguished SAFI value" and "the Encapsulation SAFI".=
 Do those two terms have the same meaning?
The Section 3 of RFC5512 has SAFI value of 7 to represent Encapsulation SAF=
I.

Does it mean that the "distinguished SAFI value" is just "7" for speaker to=
 advertise its supported Tunnel information?

Yes, per RFC 5512 the Tunnel Encapsulation attribute can only be carried on=
 UPDATEs of SAFI 7.

Draft-ietf-idr-tunnel-encaps deprecates this SAFI, and explicitly allows th=
e Tunnel Encapsulation attribute to be carried on UPDATEs whose AFI/SAFI is=
 1/1, 1/4, 2/4, 1/128, 2/128, and 25/70.  Use of the attribute on other AFI=
/SAFIs is outside the scope of the draft.



The Section 4 goes on defining the Tunnel Encapsulation Type (such as L2TPv=
3 with Type =3D1; etc), and a list of sub-TLVs, one of the SubTLV is Protoc=
ol Type (section 4.2) which can be used to represent the Encapsulation Prot=
ocol (i.e. protocol type of data frames carried by the tunnel)

Just to be clear, the Protocol Type sub-TLV identifies the protocol type of=
 the payload.  If a Protocol Type sub-TLV identifying "IPv4" appears inside=
 a Tunnel Type of "GRE", the meaning is that IPv4 packets may be carried in=
side a GRE tunnel.


Why need the Opaque extended community to indicate the Encapsulation protoc=
ol?

[cid:image001.png@01D4122A.8D7BE360]

[cid:image002.png@01D4122A.8D7BE360]



Well, the argument was "I just want to indicate that packets directed to a =
given prefix need to be encapsulated in GRE.  I don't want to have to use a=
 new SAFI to say that, all it takes is putting a community on the UPDATE th=
at mentions that prefix in its NLRI".  That's fine as long as you don't wan=
t to convey any additional information about how to construct the encapsula=
tion.  In practice, people have invented additional extended communities to=
 carry information that should have been carried in the Tunnel Encapsulatio=
n attribute, in order to avoid the use of SAFI 7.

This extended community is not really necessary when draft-ietf-idr-tunnel-=
encaps is used, but it is preserved for backwards compatibility purposes; s=
ee section 4.5 of that draft.



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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Eric, IDR group, <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" style=3D"text-autospace:none"><span style=3D"color:#=
1F497D">It is indicated that RFC5512 is to be replaced by
</span><span style=3D"color:#1F497D">draft-ietf-idr-tunnel-encaps. But draf=
t-ietf-idr-tunnel-encaps-09 stated that it
</span><span style=3D"font-size:10.0pt;font-family:Courier;color:windowtext=
">deprecates the<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">Encapsulation SAFI.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We find the Encapsulat=
ion SAFI is quite useful for CPE based EVPN. &nbsp;For example, a Controlle=
r (say RR) can send an update with Encapsulation SAFI to two end points to =
trigger a tunnel establishment between them.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"color:#1F=
497D">What are side effect for having Encap SAFI? Can we preserve it in dra=
ft-ietf-idr-tunnel-encaps?<o:p></o:p></span></a></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, Linda Dunbar<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 #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Linda Dunbar
<br>
<b>Sent:</b> Friday, June 29, 2018 2:54 PM<br>
<b>To:</b> 'Eric C Rosen' &lt;erosen@juniper.net&gt;; idr@ietf.org; pmohapa=
t@cisco.com; erosen@cisco.com; 'draft-ietf-idr-tunnel-encaps@ietf.org' &lt;=
draft-ietf-idr-tunnel-encaps@ietf.org&gt;<br>
<b>Subject:</b> Can draft-ietf-idr-tunnel-encaps-09 trigger tunnel creation=
 before VPN is established?
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Eric, <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">Thank you very much fo=
r the reply.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Can draft-ietf-idr-tun=
nel-encaps-09 trigger tunnel creation before VPN is established?<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">For example, having RR=
 sending down the Encap extended community to both end points of a tunnel? =
Instead of tunnel&#8217;s one end point to send to others?<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">Thank you very much. <=
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">Linda Dunbar<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>
<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"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Eric C Rosen [<a href=3D"mailto:erosen@ju=
niper.net">mailto:erosen@juniper.net</a>]
<br>
<b>Sent:</b> Tuesday, June 26, 2018 2:28 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com">lind=
a.dunbar@huawei.com</a>&gt;;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>; <a href=3D"mailto:pmohapa=
t@cisco.com">
pmohapat@cisco.com</a>; <a href=3D"mailto:erosen@cisco.com">erosen@cisco.co=
m</a><br>
<b>Subject:</b> Re: [Idr] Questions to RFC5512: Encapsulation sub-TLV and O=
paque extended community to indicate the Encapsulation protocol?<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">I think it would be b=
etter if you looked at draft-ietf-idr-tunnel-encaps instead of RFC 5512.&nb=
sp; The draft has passed WG LC, and if it ever gets sent to the IESG, it wi=
ll obsolete RFC 5512.<span style=3D"font-size:12.0pt"><o:p></o:p></span></p=
>
<div>
<p class=3D"MsoNormal">On 6/26/2018 1:56 PM, Linda Dunbar wrote:<o:p></o:p>=
</p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal">BGP experts: <o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">If the RFC5512 has &#8220;distinguished SAFI value&#=
8221; and &#8220;the Encapsulation SAFI&#8221;. Do those two terms have the=
 same meaning?
<o:p></o:p></p>
<p class=3D"MsoNormal">The Section 3 of RFC5512 has SAFI value of 7 to repr=
esent Encapsulation SAFI.
<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">Does it mean that the &#8220;distinguished SAFI valu=
e&#8221; is just &#8220;7&#8221; for speaker to advertise its supported Tun=
nel information?
<o:p></o:p></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Times New Roman&quot;,serif"><br>
Yes, per RFC 5512 the Tunnel Encapsulation attribute can only be carried on=
 UPDATEs of SAFI 7.<br>
<br>
Draft-ietf-idr-tunnel-encaps deprecates this SAFI, and explicitly allows th=
e Tunnel Encapsulation attribute to be carried on UPDATEs whose AFI/SAFI is=
 1/1, 1/4, 2/4, 1/128, 2/128, and 25/70.&nbsp; Use of the attribute on othe=
r AFI/SAFIs is outside the scope of the
 draft.<br>
<br>
<o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">The Section 4 goes on defining the Tunnel Encapsulat=
ion Type (such as L2TPv3 with Type =3D1; etc), and a list of sub-TLVs, one =
of the SubTLV is Protocol Type (section 4.2) which can be used to represent=
 the Encapsulation Protocol (i.e. protocol
 type of data frames carried by the tunnel)<o:p></o:p></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Times New Roman&quot;,serif"><br>
Just to be clear, the Protocol Type sub-TLV identifies the protocol type of=
 the payload.&nbsp; If a Protocol Type sub-TLV identifying &quot;IPv4&quot;=
 appears inside a Tunnel Type of &quot;GRE&quot;, the meaning is that IPv4 =
packets may be carried inside a GRE tunnel.<br>
<br>
<o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">Why need the Opaque extended community to indicate t=
he Encapsulation protocol?<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:SimSun;c=
olor:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:SimSun;c=
olor:#1F497D"><img border=3D"0" width=3D"572" height=3D"155" id=3D"_x0000_i=
1025" src=3D"cid:image001.png@01D4122A.8D7BE360"></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:SimSun;c=
olor:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><img border=3D"0" width=3D"653" height=3D"112" id=3D=
"_x0000_i1026" src=3D"cid:image002.png@01D4122A.8D7BE360"><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Times New Roman&quot;,serif"><br>
Well, the argument was &quot;I just want to indicate that packets directed =
to a given prefix need to be encapsulated in GRE.&nbsp; I don't want to hav=
e to use a new SAFI to say that, all it takes is putting a community on the=
 UPDATE that mentions that prefix in its NLRI&quot;.&nbsp;
 That's fine as long as you don't want to convey any additional information=
 about how to construct the encapsulation.&nbsp; In practice, people have i=
nvented additional extended communities to carry information that should ha=
ve been carried in the Tunnel Encapsulation
 attribute, in order to avoid the use of SAFI 7.<br>
<br>
This extended community is not really necessary when draft-ietf-idr-tunnel-=
encaps is used, but it is preserved for backwards compatibility purposes; s=
ee section 4.5 of that draft.<br>
<br>
<br>
<o:p></o:p></span></p>
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From nobody Tue Jul  3 09:00:21 2018
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From: "\"IETF Secretariat\"" <agenda@ietf.org>
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Subject: [Idr] idr - Requested sessions have been scheduled for IETF 102
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Dear John Scudder,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 


    idr Session 1 (1:00 requested)
    Thursday, 19 July 2018, Afternoon Session III 1810-1910
    Room Name: Viger size: 200
    ---------------------------------------------
    idr Session 2 (1:30 requested)
    Friday, 20 July 2018, Afternoon Session I 1150-1320
    Room Name: Place du Canada size: 300
    ---------------------------------------------


iCalendar: https://datatracker.ietf.org/meeting/102/sessions/idr.ics

Request Information:


---------------------------------------------------------
Working Group Name: Inter-Domain Routing
Area Name: Routing Area
Session Requester: John Scudder

Number of Sessions: 2
Length of Session(s):  1.5 Hours, 1 Hour
Number of Attendees: 120
Conflicts to Avoid: 
 First Priority: sidrops lsr bfd netconf netmod grow i2nsf i2rs lsvr
 Second Priority: bess babel



People who must be present:
  Susan Hares
  John Scudder
  Alvaro Retana

Resources Requested:

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


From nobody Tue Jul  3 10:21:20 2018
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fTZIPhvYQLC3adslb6bLc8771NI>
Subject: Re: [Idr] What are side effect for having Encap SAFI? can draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before VPN is established?
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On 7/2/2018 6:31 PM, Linda Dunbar wrote:
>
> Eric, IDR group,
>
> It is indicated that RFC5512 is to be replaced by 
> draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-09 
> stated that it deprecates the
>
> Encapsulation SAFI.
>
> We find the Encapsulation SAFI is quite useful for CPE based EVPN. 
>  For example, a Controller (say RR) can send an update with 
> Encapsulation SAFI to two end points to trigger a tunnel establishment 
> between them.
>
> What are side effect for having Encap SAFI? Can we preserve it in 
> draft-ietf-idr-tunnel-encaps?
>
> Thanks, Linda Dunbar
>

SAFI 7 was deprecated because no one seemed interested in using it, it 
creates additional operational issues, there is no real need for it, and 
it was discouraging folks from actually using the Tunnel Encapsulation 
attribute.  This is discussed briefly in section 1.2 of the draft.

You can get a similar effect by using the technique described in section 
7 of the draft.

If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE 
whose NLRI is PE1's loopback address.  Put the Tunnel Encapsulation 
attribute (with PE1 as remote endpoint) on this UPDATE.  (The next hop 
field of this UPDATE doesn't really matter, as long as it is 
resolvable.)  When PE1 originates VPN routes, it sets the next hop to be 
its loopback address.  Per section 7, this will result in packets being 
sent to PE1 though the specified tunnel.



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    On 7/2/2018 6:31 PM, Linda Dunbar wrote:<br>
    <blockquote type="cite"
cite="mid:4A95BA014132FF49AE685FAB4B9F17F66B07A7E6@sjceml521-mbs.china.huawei.com">
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        <p class="MsoNormal"><span style="color:#1F497D">Eric, IDR
            group, <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal" style="text-autospace:none"><span
            style="color:#1F497D">It is indicated that RFC5512 is to be
            replaced by
          </span><span style="color:#1F497D">draft-ietf-idr-tunnel-encaps.
            But draft-ietf-idr-tunnel-encaps-09 stated that it
          </span><span
            style="font-size:10.0pt;font-family:Courier;color:windowtext">deprecates
            the<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:Courier;color:windowtext">Encapsulation
            SAFI.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:Courier;color:windowtext"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">We find the
            Encapsulation SAFI is quite useful for CPE based EVPN.  For
            example, a Controller (say RR) can send an update with
            Encapsulation SAFI to two end points to trigger a tunnel
            establishment between them.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><a name="_MailEndCompose"
            moz-do-not-send="true"><span style="color:#1F497D">What are
              side effect for having Encap SAFI? Can we preserve it in
              draft-ietf-idr-tunnel-encaps?<o:p></o:p></span></a></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Thanks, Linda
            Dunbar<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <span style="font-size:12.0pt;font-family:&quot;Times New
          Roman&quot;,serif">
          <o:p></o:p></span>
      </div>
    </blockquote>
    <br>
    SAFI 7 was deprecated because no one seemed interested in using it,
    it creates additional operational issues, there is no real need for
    it, and it was discouraging folks from actually using the Tunnel
    Encapsulation attribute.  This is discussed briefly in section 1.2
    of the draft.<br>
    <br>
    You can get a similar effect by using the technique described in
    section 7 of the draft.<br>
    <br>
    If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE
    whose NLRI is PE1's loopback address.  Put the Tunnel Encapsulation
    attribute (with PE1 as remote endpoint) on this UPDATE.  (The next
    hop field of this UPDATE doesn't really matter, as long as it is
    resolvable.)  When PE1 originates VPN routes, it sets the next hop
    to be its loopback address.  Per section 7, this will result in
    packets being sent to PE1 though the specified tunnel.<br>
    <br>
     <br>
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Date: Tue, 03 Jul 2018 13:18:12 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Susan Hares <shares@ndzh.com>, <idr@ietf.org>
CC: <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "=?UTF-8?B?J+W+kOWwj+iZjic=?=  (=?UTF-8?B?5LmJ5YWI?=)" <xiaohu.xxh@alibaba-inc.com>, "'Ketan Talaulikar (ketant)'" <ketant@cisco.com>, <aretana.ietf@gmail.com>, 'John Scudder' <jgs@juniper.net>
Message-ID: <BF85A860-9DCF-4809-ACAE-4F08D5947040@gmail.com>
Thread-Topic: WG adoption call for draft-xu-idr-neighbor-autodiscovery
References: <013701d41227$579d2d10$06d78730$@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hi Sue,

=20

I=E2=80=99m not aware of any IPR.

=20

1) Yes

2) if BGP is not used for reachability distribution, I=E2=80=99d question use of =
BGP as the neighbor autodiscovery technology, however for all practical reas=
ons, there=E2=80=99s significant number of DC=E2=80=99s todays that run BGP (Use of BGP =
for Routing in Large-Scale Data Centers, RFC 7938) seems to be a rather popu=
lar way to deploy undelay routing.

3) Yes, it could and should if BGP is used, using Hello message to convey t=
he information needed is a technically sound approach, while using other pro=
tocols to do the same is definitely possible, additional complexity should n=
ot be underestimated=20

4) it could be leveraged by the LSVR

=20

Cheers,

Jeff

=20

From: Susan Hares <shares@ndzh.com>
Date: Monday, July 2, 2018 at 10:09
To: <idr@ietf.org>
Cc: <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "'=E5=BE=90=E5=B0=8F=E8=99=8E' (=E4=B9=89=E5=85=88)" =
<xiaohu.xxh@alibaba-inc.com>, "'Ketan Talaulikar (ketant)'" <ketant@cisco.co=
m>, Alvaro Retana <aretana.ietf@gmail.com>, 'John Scudder' <jgs@juniper.net>
Subject: WG adoption call for draft-xu-idr-neighbor-autodiscovery
Resent-From: <alias-bounces@ietf.org>
Resent-To: <xiaohu.xxh@alibaba-inc.com>, <bikunyang@huawei.com>, Jeff Tants=
ura <jefftant.ietf@gmail.com>, <nikos@linkedin.com>, <ketant@cisco.com>
Resent-Date: Mon, 2 Jul 2018 10:09:04 -0700 (PDT)

=20

Greetings:=20

=20

This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscove=
ry (July 2 =E2=80=93 July 16). =20

=20

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

=20

The authors of this draft should send their IPR statements in response to t=
his email.  I hope the authors will ihelp their vacationing co-authors to re=
spond by July 7th. =20

=20

The WG should consider the following:=20
Does BGP need to have an autodiscovery mechanism for peers within Data Cent=
ers?=20
Does this mechanism work for other deployments?=20
=20
If so, should be passed in BGP Hello message? =20
Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=20

=20
Does this interact with any of the LSVR work?=20
=20

I want to thank the authors for their patience while we sorted through some=
 of the WG LC for other drafts.  We decided to wait until some of those disc=
ussion were cleared up prior to starting a new WG Adoption call.

=20

=20

Susan Hares=20


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--></style></head><body lang=3DEN-US link=3Dblue vlink=3Dpurple><div class=3DWordSe=
ction1><p class=3DMsoNormal>Hi Sue,<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbs=
p;</o:p></p><p class=3DMsoNormal>I=E2=80=99m not aware of any IPR.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>1) Yes<o:p></o:p></p=
><p class=3DMsoNormal>2) if BGP is not used for reachability distribution, I=E2=80=
=99d question use of BGP as the neighbor autodiscovery technology, however for=
 all practical reasons, there=E2=80=99s significant number of DC=E2=80=99s todays that r=
un BGP (Use of BGP for Routing in Large-Scale Data Centers, RFC 7938) seems =
to be a rather popular way to deploy undelay routing.<o:p></o:p></p><p class=
=3DMsoNormal>3) Yes, it could and should if BGP is used, using Hello message t=
o convey the information needed is a technically sound approach, while using=
 other protocols to do the same is definitely possible, additional complexit=
y should not be underestimated <o:p></o:p></p><p class=3DMsoNormal>4) it could=
 be leveraged by the LSVR<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p>=
</p><div><p class=3DMsoNormal><span style=3D'color:black'>Cheers,<o:p></o:p></sp=
an></p></div><p class=3DMsoNormal><span style=3D'color:black'>Jeff</span><o:p></=
o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div style=3D'border:none;bord=
er-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b>=
<span style=3D'font-size:12.0pt;color:black'>From: </span></b><span style=3D'fon=
t-size:12.0pt;color:black'>Susan Hares &lt;shares@ndzh.com&gt;<br><b>Date: <=
/b>Monday, July 2, 2018 at 10:09<br><b>To: </b>&lt;idr@ietf.org&gt;<br><b>Cc=
: </b>&lt;draft-xu-idr-neighbor-autodiscovery@ietf.org&gt;, &quot;'</span><s=
pan style=3D'font-size:12.0pt;font-family:"MS Gothic";color:black'>=E5=BE=90=E5=B0=8F=E8=99=8E</=
span><span style=3D'font-size:12.0pt;color:black'>' (</span><span style=3D'font-=
size:12.0pt;font-family:MingLiU;color:black'>=E4=B9=89</span><span style=3D'font-siz=
e:12.0pt;font-family:"MS Gothic";color:black'>=E5=85=88</span><span style=3D'font-si=
ze:12.0pt;color:black'>)&quot; &lt;xiaohu.xxh@alibaba-inc.com&gt;, &quot;'Ke=
tan Talaulikar (ketant)'&quot; &lt;ketant@cisco.com&gt;, Alvaro Retana &lt;a=
retana.ietf@gmail.com&gt;, 'John Scudder' &lt;jgs@juniper.net&gt;<br><b>Subj=
ect: </b>WG adoption call for draft-xu-idr-neighbor-autodiscovery<br><b>Rese=
nt-From: </b>&lt;alias-bounces@ietf.org&gt;<br><b>Resent-To: </b>&lt;xiaohu.=
xxh@alibaba-inc.com&gt;, &lt;bikunyang@huawei.com&gt;, Jeff Tantsura &lt;jef=
ftant.ietf@gmail.com&gt;, &lt;nikos@linkedin.com&gt;, &lt;ketant@cisco.com&g=
t;<br><b>Resent-Date: </b>Mon, 2 Jul 2018 10:09:04 -0700 (PDT)<o:p></o:p></s=
pan></p></div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><p class=3DMs=
oNormal>Greetings: <o:p></o:p></p><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p=
 class=3DMsoNormal>This begins a 2 week WG adoption call for draft-xu-idr-neig=
hbor-autodiscovery (July 2 =E2=80=93 July 16).&nbsp; <o:p></o:p></p><p class=3DMsoNo=
rmal>&nbsp;<o:p></o:p></p><p class=3DMsoNormal><a href=3D"https://datatracker.ie=
tf.org/doc/draft-xu-idr-neighbor-autodiscovery/">https://datatracker.ietf.or=
g/doc/draft-xu-idr-neighbor-autodiscovery/</a><o:p></o:p></p><p class=3DMsoNor=
mal>&nbsp;<o:p></o:p></p><p class=3DMsoNormal>The authors of this draft should=
 send their IPR statements in response to this email. &nbsp;I hope the autho=
rs will ihelp their vacationing co-authors to respond by July 7<sup>th</sup>=
.&nbsp; <o:p></o:p></p><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p class=3DMsoN=
ormal>The WG should consider the following: <o:p></o:p></p><ol style=3D'margin=
-top:0in' start=3D1 type=3D1><li class=3DMsoListParagraph style=3D'margin-left:0in;m=
so-list:l0 level1 lfo2'>Does BGP need to have an autodiscovery mechanism for=
 peers within Data Centers? <o:p></o:p></li><li class=3DMsoListParagraph style=
=3D'margin-left:0in;mso-list:l0 level1 lfo2'>Does this mechanism work for othe=
r deployments? <o:p></o:p></li></ol><p class=3DMsoListParagraph>&nbsp;<o:p></o=
:p></p><ol style=3D'margin-top:0in' start=3D3 type=3D1><li class=3DMsoListParagraph =
style=3D'margin-left:0in;mso-list:l0 level1 lfo2'>If so, should be passed in B=
GP Hello message?&nbsp; <o:p></o:p></li></ol><p class=3DMsoListParagraph>Or sh=
ould it be a part of another protocol (e.g. LLDP, BFD, etc). <o:p></o:p></p>=
<p class=3DMsoNormal>&nbsp;<o:p></o:p></p><ol style=3D'margin-top:0in' start=3D4 t=
ype=3D1><li class=3DMsoListParagraph style=3D'margin-left:0in;mso-list:l0 level1 l=
fo2'>Does this interact with any of the LSVR work? <o:p></o:p></li></ol><p c=
lass=3DMsoNormal>&nbsp;<o:p></o:p></p><p class=3DMsoNormal>I want to thank the a=
uthors for their patience while we sorted through some of the WG LC for othe=
r drafts.&nbsp; We decided to wait until some of those discussion were clear=
ed up prior to starting a new WG Adoption call.<o:p></o:p></p><p class=3DMsoNo=
rmal>&nbsp;<o:p></o:p></p><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p class=3DM=
soNormal>Susan Hares <o:p></o:p></p></div></body></html>

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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, =?gb2312?B?J9Ds0KG7oijS5c/IKSc=?= <xiaohu.xxh@alibaba-inc.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "'John Scudder'" <jgs@juniper.net>
Thread-Topic: WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Wed, 4 Jul 2018 05:34:34 +0000
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US">Hello,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US">I am not aware of any IPR related to this draft.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US">Ketan<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"color:#1F497D;mso-fare=
ast-language:EN-US"><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>From:</b> Susan Hares &lt;shares@ndzh.com&gt; <br=
>
<b>Sent:</b> 02 July 2018 22:39<br>
<b>To:</b> idr@ietf.org<br>
<b>Cc:</b> draft-xu-idr-neighbor-autodiscovery@ietf.org; '<span lang=3D"ZH-=
CN" style=3D"font-family:SimSun">=D0=EC=D0=A1=BB=A2</span>(<span lang=3D"ZH=
-CN" style=3D"font-family:SimSun">=D2=E5=CF=C8</span>)' &lt;xiaohu.xxh@alib=
aba-inc.com&gt;; Ketan Talaulikar (ketant) &lt;ketant@cisco.com&gt;; aretan=
a.ietf@gmail.com;
 'John Scudder' &lt;jgs@juniper.net&gt;<br>
<b>Subject:</b> WG adoption call for draft-xu-idr-neighbor-autodiscovery<o:=
p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Greetings: <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This begins a 2 week WG adoption call for draft-xu-i=
dr-neighbor-autodiscovery (July 2 =A8C July 16).&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/doc/draft-xu=
-idr-neighbor-autodiscovery/">https://datatracker.ietf.org/doc/draft-xu-idr=
-neighbor-autodiscovery/</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The authors of this draft should send their IPR stat=
ements in response to this email. &nbsp;I hope the authors will ihelp their=
 vacationing co-authors to respond by July 7<sup>th</sup>.&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The WG should consider the following: <o:p></o:p></p=
>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">1)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does BGP need to have an autodiscovery mechanism fo=
r peers within Data Centers?
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">2)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does this mechanism work for other deployments? <o:=
p></o:p></p>
<p class=3D"MsoListParagraph"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">3)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>If so, should be passed in BGP Hello message?&nbsp;=
 <o:p></o:p></p>
<p class=3D"MsoListParagraph">Or should it be a part of another protocol (e=
.g. LLDP, BFD, etc).
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">4)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does this interact with any of the LSVR work? <o:p>=
</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I want to thank the authors for their patience while=
 we sorted through some of the WG LC for other drafts.&nbsp; We decided to =
wait until some of those discussion were cleared up prior to starting a new=
 WG Adoption call.<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">Susan Hares <o:p></o:p></p>
</div>
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Subject: [Idr] draft-xu-idr-neighbor-autodiscovery-08
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Few questions and comments on draft-xu-idr-neighbor-autodiscovery:

1. I recommend you rename HOLDTIME to H-TIME or R-TIME (Retention Time) in
order to avoid confusion with BGP OPEN HOLDTIME.

2. While most of the text is consistent and talks about single peering
address there is moment when plural form is used:  "that cover the peering
address(es)". Can someone elaborate more on intention here to send multiple
peering addresses ? Also if sending multiple peering addressed in BGP Hello
is being considered where such addresses will be actually sent as Peering
Address TLV clearly talks about single address

3. Related to #2 if I would like to send both IPv4 and IPv6 peering
addresses how those will be encoded ? Is there an assumption that Peering
Address TLV will be present multiple times in such cases ?

4. Are proposed Hello messages supposed to be send over all interfaces or
it will be customized on a per outbound interface or group of interfaces
basis ?

5. Having Peering Address TLV & Local Prefixes TLV (for cases of loopback
peering) I don't quite see a need for Link Attribute TLV at all.

6. Likewise Neighbor TLV seems quite unnecessary to me. To whom it will be
sent ? To the peer we just established the peering with :) ? To other peers
- why ?

7. One of the fundamental element of all BGP peerings is ability to detect
peering liveness without tuning down BGP holdtime timer. Yet this proposal
does not mention nor signal a bit about say BFD to be used mutually by both
sides on the discovered links.

8. The draft is also pretty silent on how often the BGP HELLOs  will be
sent. For example is there an exponential timer allowing to slow down when
the other side is not there yet ?

9. The text I read in the last paragraph is super scary:

   "A BGP peer
   maintains a hold timer with each Hello adjacency that it restarts
   when it receives a Hello that matches the adjacency.  If the timer
   expires without receipt of a matching Hello from the peer, BGP
   concludes that the peer no longer wishes to keep BGP session for that
   link or that the peer has failed. The BGP peer then deletes the
   Hello adjacency.  The route towards the BGP neighbor's loopback
   address that had been dynamically created due to that BGP Hello
   adjacency SHOULD be deleted accordingly.  When the last Hello
   adjacency for an BGP session is deleted, the BGP peer terminates the
   BGP session and closing the transport connection."

Your recommendation for two octet BGP Hello Holdtime expressed in seconds
is 15 sec. Are you invalidating use and state machine associated with BGP
Keepalive MSG above? I recommend this text is removed as it adds a lot of
new mechanism to BGP state machine.

10. Do you plane to actually update BGP state machine ?

11. At present your auto-discovery does not mention anything about use of
BGP MD5 or TCP-A0. Is there an assumption that peers which are discovering
themselves will have those configured ? Is there also an assumption that I
should always trust information received with BGP Hello messages ?
Shouldn't we perhaps aim at private/public key authentication model instead
?

12. Draft says:

"BGP hello messages are only exchanged between physically connected peers
that are trustworthy."

How is that trust determined ? Is there an implicit assumption that BGP
Hello is something you need to enable on a per physical interface basis
where you know apriori the other side of the fiber ? Doesn't it reduce the
full automation one should expect out of this proposal ? Also when I peer
with someone via L2 switch - still assume on a p2p basis - does this setup
prevents me from use of BGP Hello Messages ?

Thx,
Robert.

PS. I would like to first understand the authors perspective on the above
observations before responding to Sue's WG adoption call.

--000000000000e4936305702859c9
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Few questi=
ons and comments on=C2=A0draft-xu-idr-neighbor-autodiscovery:</div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small">1. I recommend you rename HOLDTIME =
to H-TIME or R-TIME (Retention Time) in order to avoid confusion with BGP O=
PEN HOLDTIME.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">2.=
 While most of the text is consistent and talks about single peering addres=
s there is moment when plural form is used:=C2=A0 &quot;that cover the peer=
ing address(es)&quot;. Can someone elaborate more on intention here to send=
 multiple peering addresses ? Also if sending multiple peering addressed in=
 BGP Hello is being considered where such addresses will be actually sent a=
s Peering Address TLV clearly talks about single address<br></div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">3. Related to #2 if I would like to =
send both IPv4 and IPv6 peering addresses how those will be encoded ? Is th=
ere an assumption that Peering Address TLV will be present multiple times i=
n such cases ?=C2=A0</div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">4=
. Are proposed Hello messages supposed to be send over all interfaces or it=
 will be customized on a per outbound interface or group of interfaces basi=
s ?=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small">5. Having Pe=
ering Address TLV &amp; Local Prefixes TLV (for cases of loopback peering) =
I don&#39;t quite see a need for Link Attribute TLV at all.=C2=A0</div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">6. Likewise Neighbor TLV seems =
quite unnecessary to me. To whom it will be sent ? To the peer we just esta=
blished the peering with :) ? To other peers - why ?=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">7. One of the fundamental element of =
all BGP peerings is ability to detect peering liveness without tuning down =
BGP holdtime timer. Yet this proposal does not mention nor signal a bit abo=
ut say BFD to be used mutually by both sides on the discovered links.=C2=A0=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">8. The draft is also =
pretty silent on how often the BGP HELLOs=C2=A0 will be sent. For example i=
s there an exponential timer allowing to slow down when the other side is n=
ot there yet ?=C2=A0</div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">9=
. The text I read in the last paragraph is super scary:</div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><div class=3D"gmail_default">=C2=A0 =C2=
=A0&quot;A BGP peer</div><div class=3D"gmail_default">=C2=A0 =C2=A0maintain=
s a hold timer with each Hello adjacency that it restarts</div><div class=
=3D"gmail_default">=C2=A0 =C2=A0when it receives a Hello that matches the a=
djacency.=C2=A0 If the timer</div><div class=3D"gmail_default">=C2=A0 =C2=
=A0expires without receipt of a matching Hello from the peer, BGP</div><div=
 class=3D"gmail_default">=C2=A0 =C2=A0concludes that the peer no longer wis=
hes to keep BGP session for that</div><div class=3D"gmail_default">=C2=A0 =
=C2=A0link or that the peer has failed. The BGP peer then deletes the</div>=
<div class=3D"gmail_default">=C2=A0 =C2=A0Hello adjacency.=C2=A0 The route =
towards the BGP neighbor&#39;s loopback</div><div class=3D"gmail_default">=
=C2=A0 =C2=A0address that had been dynamically created due to that BGP Hell=
o</div><div class=3D"gmail_default">=C2=A0 =C2=A0adjacency SHOULD be delete=
d accordingly.=C2=A0 When the last Hello</div><div class=3D"gmail_default">=
=C2=A0 =C2=A0adjacency for an BGP session is deleted, the BGP peer terminat=
es the</div><div class=3D"gmail_default">=C2=A0 =C2=A0BGP session and closi=
ng the transport connection.&quot;</div><div class=3D"gmail_default"><br></=
div><div class=3D"gmail_default">Your recommendation for two octet BGP Hell=
o Holdtime expressed in seconds is 15 sec. Are you invalidating use and sta=
te machine associated with BGP Keepalive MSG above? I recommend this text i=
s removed as it adds a lot of new mechanism to BGP state machine.=C2=A0</di=
v><div class=3D"gmail_default"><br></div><div class=3D"gmail_default">10. D=
o you plane to actually update BGP state machine ?=C2=A0</div><div class=3D=
"gmail_default"><br></div><div class=3D"gmail_default">11. At present your =
auto-discovery does not mention anything about use of BGP MD5 or TCP-A0. Is=
 there an assumption that peers which are discovering themselves will have =
those configured ? Is there also an assumption that I should always trust i=
nformation received with BGP Hello messages ? Shouldn&#39;t we perhaps aim =
at private/public key authentication model instead ?=C2=A0</div><div class=
=3D"gmail_default"><br></div><div class=3D"gmail_default">12. Draft says:=
=C2=A0</div><div class=3D"gmail_default"><br></div><div class=3D"gmail_defa=
ult">&quot;BGP hello messages are only exchanged between physically connect=
ed peers that are trustworthy.&quot;=C2=A0</div><div class=3D"gmail_default=
"><br></div><div class=3D"gmail_default">How is that trust determined ? Is =
there an implicit assumption that BGP Hello is something you need to enable=
 on a per physical interface basis where you know apriori the other side of=
 the fiber ? Doesn&#39;t it reduce the full automation one should expect ou=
t of this proposal ? Also when I peer with someone via L2 switch - still as=
sume on a p2p basis - does this setup prevents me from use of BGP Hello Mes=
sages ?</div><div class=3D"gmail_default"><br></div><div class=3D"gmail_def=
ault">Thx,</div><div class=3D"gmail_default">Robert.</div><div class=3D"gma=
il_default"><br></div></div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small">PS. I would like to first un=
derstand the authors perspective on the above observations before respondin=
g to Sue&#39;s WG adoption call.=C2=A0</div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><br></div></div>

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Thread-Topic: [Idr] draft-xu-idr-neighbor-autodiscovery-08
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
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CC: "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: Draft IDR agenda posted
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Dear all,

The draft agenda of IDR session is posted:

https://datatracker.ietf.org/meeting/102/materials/agenda-102-idr-00


Please let us know if you have any problem with it.

Presenters,

Please prepare to send your slides to me and CC the chairs. The deadline fo=
r slides is 24 hours prior to our first session (Thursday) , though earlier=
 is better.

And please take a look at the checklist for presenting at IDR:
https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%2=
0at%20an%20IDR%20meeting

Best regards,
Jie


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<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all, <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The draft agenda of IDR session=
 is posted:
<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"><a href=3D"https://datatracker.=
ietf.org/meeting/102/materials/agenda-102-idr-00">https://datatracker.ietf.=
org/meeting/102/materials/agenda-102-idr-00</a><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"MsoPlainText"><span lang=3D"EN-US">Please let us know if you ha=
ve any problem with it.<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">Presenters, <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 prepare to send your sli=
des to me and CC the chairs. The deadline for slides is 24 hours prior to o=
ur first session (Thursday) , though earlier is better.
<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">And please take a look at the c=
hecklist for presenting at IDR:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://trac.tools.i=
etf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%20at%20an%20IDR%20mee=
ting">https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presen=
ting%20at%20an%20IDR%20meeting</a><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">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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Hi Ketan,

Thank you for comments.

I see two fundamental issues here:

*Issue #1: *

With all assumptions made in the draft about awareness of the "other side"
as well as with the additional requirement to set per interface policy to
scope the content of BGP Hellos to specific peer or peers what is proposed
here is not autodiscovery. At most it is BGP build in automation for p2p
BGP session auto provisioning. So inbound configuration automation. Don't
we have sufficient set of tools already ? And this is only local ... It
does not discover IBGP or EBGP peers far from each other like proposed in
other IDR expired document: draft-raszuk-idr-bgp-auto-discovery-05

I am really not sure if we should do that in BGP, but if so let's at least
call it correctly.

*Issue #2: *

As you mentioned some proposed already TLVs have nothing to do with BGP.
What is defined is the IGP like interface_IDs discovery for the purpose of
LSVR. So initially LSVR claimed to *only* get passively BGP-LS information.
Now we see more stuff being defined to help LSVR. Where does it stop ? Do
we really want to add this code to BGP protocol which creates a global
Internet reachability only if someone thought about using LSVR in few DCs ?

You actually go further and already indicating that now BGP will be used as
topology discovery for TE purposes. This is getting IMHO really bad.

TLVs here look very innocent by itself ... but when you realize
consequences this attaches LSVR together with core BGP - at least BGP code
wise. I do not think this is good idea at all.

Note that because basic BGP is used in few MSDCs there is number of
followers which do want to use it also in much smaller DC fabrics. When you
have few hundreds L3 nodes regular link state routing (even without any
flooding reduction) would do much better job - but because of all of the
noise to use BGP a lot of folks are getting very confused and positioning
"BGP everywhere" regardless if this is optimal fit or not.


+ one more comment below ...


*=E2=80=8B[KT] There is no intention to change the BGP state machine for th=
e TCP
session. *

Well you are clearly calling for tearing down BGP upon missing reception of
BGP Hello by removing reachability information. Well let's discuss this
more. If BGP is established over connected interface (not to loopback) how
do you attempt to bring down BGP when BGP peer will stop sending Hellos ?

And if you have session between loopbacks is cutting reachability the best
way to bring down BGP between two peers ? It sounds like we spend so much
energy in routing BGP to be graceful that such brutal force is rather
something to be avoided.

So the way you are referring to deleting BGP sessions when Hellos stop does
require quite some interaction with other BGP mechanisms as well as
adjusting state machine. I understand you are trying to stay away from it
.. well I am afraid it is not going to be possible :(.


Thx,
R.



On Wed, Jul 4, 2018 at 11:49 AM, Ketan Talaulikar (ketant) <ketant@cisco.co=
m
> wrote:

> Hi Robert,
>
>
>
> Thanks for your review and comments. Please check inline below for
> responses.
>
>
>
>
>
> *From:* Idr <idr-bounces@ietf.org> *On Behalf Of *Robert Raszuk
> *Sent:* 04 July 2018 14:08
> *To:* idr wg <idr@ietf.org>
> *Subject:* [Idr] draft-xu-idr-neighbor-autodiscovery-08
>
>
>
>
>
> Few questions and comments on draft-xu-idr-neighbor-autodiscovery:
>
>
>
> 1. I recommend you rename HOLDTIME to H-TIME or R-TIME (Retention Time) i=
n
> order to avoid confusion with BGP OPEN HOLDTIME.
>
> *[KT] Ack =E2=80=93 we could rename it to disambiguate.*
>
>
>
> 2. While most of the text is consistent and talks about single peering
> address there is moment when plural form is used:  "that cover the peerin=
g
> address(es)". Can someone elaborate more on intention here to send multip=
le
> peering addresses ? Also if sending multiple peering addressed in BGP Hel=
lo
> is being considered where such addresses will be actually sent as Peering
> Address TLV clearly talks about single address
>
> *[KT] It may be desired to have multiple (say loopback) peering addresses
> for different types of BGP sessions. E.g. IPv4 and IPv6 or any other
> AFI/SAFI split. Also see next comment.*
>
>
>
> 3. Related to #2 if I would like to send both IPv4 and IPv6 peering
> addresses how those will be encoded ? Is there an assumption that Peering
> Address TLV will be present multiple times in such cases ?
>
> *[KT] Yes. One for each peering address.*
>
>
>
> 4.. Are proposed Hello messages supposed to be send over all interfaces o=
r
> it will be customized on a per outbound interface or group of interfaces
> basis ?
>
> *[KT] Customized on per interface basis that is defined by a local config
> policy/template.*
>
>
>
> 5. Having Peering Address TLV & Local Prefixes TLV (for cases of loopback
> peering) I don't quite see a need for Link Attribute TLV at all.
>
> *[KT] At this point it is to exchange interface ID and addresses so that
> the links may be defined in an unambiguous was in the BGP-LS Link NLRI fo=
r
> each of these links. This may be required for BGP-SPF or other use-cases =
in
> DC where we want to signal the underlying link topology for say TE.*
>
>
>
> 6. Likewise Neighbor TLV seems quite unnecessary to me. To whom it will b=
e
> sent ? To the peer we just established the peering with :) ? To other pee=
rs
> - why ?
>
> *[KT] There may be policies that allow a peering to be accepted on a
> specific link. It would be good to avoid one side trying setup a BGP
> session while the other does not wish to. This mechanism allows
> establishment of a 2-way state at each link level before the BGP session
> establishment happens and also to ensure that the =E2=80=9Cpeering route=
=E2=80=9D is
> actually setup over that link.*
>
>
>
> 7. One of the fundamental element of all BGP peerings is ability to detec=
t
> peering liveness without tuning down BGP holdtime timer. Yet this proposa=
l
> does not mention nor signal a bit about say BFD to be used mutually by bo=
th
> sides on the discovered links.
>
> *[KT] Yes, this was not covered explicitly but can be done optionally. Th=
e
> desire to run BFD is one such attribute that may be signaled using the li=
nk
> attribute TLV.*
>
>
>
> 8. The draft is also pretty silent on how often the BGP HELLOs  will be
> sent. For example is there an exponential timer allowing to slow down whe=
n
> the other side is not there yet ?
>
> *[KT] This would be very similar to how IGPs or LDP run their hello which
> is periodic but then also triggered when some change or a new neighbor is
> learnt.*
>
>
>
> 9.. The text I read in the last paragraph is super scary:
>
>
>
>    "A BGP peer
>
>    maintains a hold timer with each Hello adjacency that it restarts
>
>    when it receives a Hello that matches the adjacency.  If the timer
>
>    expires without receipt of a matching Hello from the peer, BGP
>
>    concludes that the peer no longer wishes to keep BGP session for that
>
>    link or that the peer has failed. The BGP peer then deletes the
>
>    Hello adjacency.  The route towards the BGP neighbor's loopback
>
>    address that had been dynamically created due to that BGP Hello
>
>    adjacency SHOULD be deleted accordingly.  When the last Hello
>
>    adjacency for an BGP session is deleted, the BGP peer terminates the
>
>    BGP session and closing the transport connection."
>
>
>
> Your recommendation for two octet BGP Hello Holdtime expressed in seconds
> is 15 sec. Are you invalidating use and state machine associated with BGP
> Keepalive MSG above? I recommend this text is removed as it adds a lot of
> new mechanism to BGP state machine.
>
> *=E2=80=8B=E2=80=8B*
> *[KT] There is no intention to change the BGP state machine for the TCP
> session. The hello procedure brings in its own mechanism which is gets to
> the same point where the BGP session is provisioned in existing procedure=
.
> Consider that an auto-discovered BGP session is to be removed or disabled
> on an interface. This can be done by taking that link out of this discove=
ry
> mechanism. Such an action should result in stopping the hellos and
> subsequently we also would like the BGP session state at TCP level to be
> cleaned up at both ends.*
>
>
>
> 10. Do you plane to actually update BGP state machine ?
>
> *[KT] No change. However, you are right that the relationship between the
> discovery mechanism and BGP state machine needs to be explained.*
>
>
>
> 11. At present your auto-discovery does not mention anything about use of
> BGP MD5 or TCP-A0. Is there an assumption that peers which are discoverin=
g
> themselves will have those configured ? Is there also an assumption that =
I
> should always trust information received with BGP Hello messages ?
> Shouldn't we perhaps aim at private/public key authentication model inste=
ad
> ?
>
> *[KT] This aspect still needs to be covered.*
>
>
>
> 12. Draft says:
>
>
>
> "BGP hello messages are only exchanged between physically connected peers
> that are trustworthy."
>
>
>
> How is that trust determined ? Is there an implicit assumption that BGP
> Hello is something you need to enable on a per physical interface basis
> where you know apriori the other side of the fiber ? Doesn't it reduce th=
e
> full automation one should expect out of this proposal ? Also when I peer
> with someone via L2 switch - still assume on a p2p basis - does this setu=
p
> prevents me from use of BGP Hello Messages ?
>
> *[KT] While this is true in a DC environment, perhaps we do need to defin=
e
> a generic security mechanism as part of this protocol extension.*
>
>
>
> *Thanks,*
>
> *Ketan*
>
>
>
> Thx,
>
> Robert.
>
>
>
> PS. I would like to first understand the authors perspective on the above
> observations before responding to Sue's WG adoption call.
>
>
>
>
>

--000000000000adc46405702d5326
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Ketan,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">Thank you for comments.=C2=A0</div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvet=
ica,sans-serif;font-size:small">I see two fundamental issues here:</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><b>Issue #1:=C2=A0</b></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">With all assumptions made in =
the draft about awareness of the &quot;other side&quot; as well as with the=
 additional requirement to set per interface policy to scope the content of=
 BGP Hellos to specific peer or peers what is proposed here is not autodisc=
overy. At most it is BGP build in automation for p2p BGP session auto provi=
sioning. So inbound configuration automation. Don&#39;t we have sufficient =
set of tools already ? And this is only local ... It does not discover IBGP=
 or EBGP peers far from each other like proposed in other IDR expired docum=
ent:=C2=A0draft-raszuk-idr-bgp-auto-discovery-05</div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">I am really not sure if we should do that in BGP=
, but if so let&#39;s at least call it correctly.=C2=A0</div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><b>Issue #2:=C2=A0</b></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">As you mentioned some proposed already T=
LVs have nothing to do with BGP. What is defined is the IGP like interface_=
IDs discovery for the purpose of LSVR. So initially LSVR claimed to *only* =
get passively BGP-LS information. Now we see more stuff being defined to he=
lp LSVR. Where does it stop ? Do we really want to add this code to BGP pro=
tocol which creates a global Internet reachability only if someone thought =
about using LSVR in few DCs ?=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">You actually go further and already indicating that now BGP w=
ill be used as topology discovery for TE purposes. This is getting IMHO rea=
lly bad.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">TLVs he=
re look very innocent by itself ... but when you realize consequences this =
attaches LSVR together with core BGP - at least BGP code wise. I do not thi=
nk this is good idea at all.=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">Note that because basic BGP is used in few MSDCs there is num=
ber of followers which do want to use it also in much smaller DC fabrics. W=
hen you have few hundreds L3 nodes regular link state routing (even without=
 any flooding reduction) would do much better job - but because of all of t=
he noise to use BGP a lot of folks are getting very confused and positionin=
g &quot;BGP everywhere&quot; regardless if this is optimal fit or not.=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">+ one more comment below ...=C2=A0</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">

<b style=3D"font-family:arial,sans-serif;background-color:rgb(255,255,255);=
text-decoration-style:initial;text-decoration-color:initial"><i><span style=
=3D"font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small;display:inline">=E2=80=8B</div>[KT] There is no intention to=
 change the BGP state machine for the TCP session.<span>=C2=A0</span></span=
></i></b>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Well you are cl=
early calling for tearing down BGP upon missing reception of BGP Hello by r=
emoving reachability information. Well let&#39;s discuss this more. If BGP =
is established over connected interface (not to loopback) how do you attemp=
t to bring down BGP when BGP peer will stop sending Hellos ?=C2=A0<br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">And if you have session be=
tween loopbacks is cutting reachability the best way to bring down BGP betw=
een two peers ? It sounds like we spend so much energy in routing BGP to be=
 graceful that such brutal force is rather something to be avoided.=C2=A0</=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small">So the way you are refe=
rring to deleting BGP sessions when Hellos stop does require quite some int=
eraction with other BGP mechanisms as well as adjusting state machine. I un=
derstand you are trying to stay away from it .. well I am afraid it is not =
going to be possible :(.=C2=A0</div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Thx,</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gma=
il_extra"><br><div class=3D"gmail_quote">On Wed, Jul 4, 2018 at 11:49 AM, K=
etan Talaulikar (ketant) <span dir=3D"ltr">&lt;<a href=3D"mailto:ketant@cis=
co.com" target=3D"_blank">ketant@cisco.com</a>&gt;</span> wrote:<br><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_8520255935445388071WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Hi Robert,<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Thanks for your review=
 and comments. Please check inline below for responses.<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Idr &lt;<a href=3D"mailto:idr-=
bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> 04 July 2018 14:08<br>
<b>To:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;<br>
<b>Subject:</b> [Idr] draft-xu-idr-neighbor-<wbr>autodiscovery-08<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Few questions and comments on=C2=A0draft-xu-idr-neighbor-<wbr>autodisc=
overy:<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">1. I recommend you rename HOLDTIME to H-TIME or R-TIME (Retention Time=
) in order to avoid confusion with BGP OPEN HOLDTIME.=C2=A0<u></u><u></u></=
span></p>
</div>
</span><div>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Ack =E2=80=93 we could ren=
ame it to disambiguate.<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">2. While most of the text is consistent and talks about single peering=
 address there is moment when plural form is used:=C2=A0 &quot;that cover t=
he peering address(es)&quot;. Can someone elaborate more on intention
 here to send multiple peering addresses ? Also if sending multiple peering=
 addressed in BGP Hello is being considered where such addresses will be ac=
tually sent as Peering Address TLV clearly talks about single address<u></u=
><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] It may be desired t=
o have multiple (say loopback) peering addresses for different types of BGP=
 sessions. E.g. IPv4 and IPv6 or any other AFI/SAFI split.
 Also see next comment.</span></i></b><span style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u><u></u></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">3. Related to #2 if I would like to send both IPv4 and IPv6 peering ad=
dresses how those will be encoded ? Is there an assumption that Peering Add=
ress TLV will be present multiple times in such
 cases ?=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Yes. One for each p=
eering address.</span></i></b><span style=3D"font-size:11.0pt;font-family:&=
quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">4.. Are proposed Hello messages supposed to be send over all interface=
s or it will be customized on a per outbound interface or group of interfac=
es basis ?=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Customized on per interfac=
e basis that is defined by a local config policy/template.</span></i></b><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:#1f497d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">5. Having Peering Address TLV &amp; Local Prefixes TLV (for cases of l=
oopback peering) I don&#39;t quite see a need for Link Attribute TLV at all=
.=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] At this point it is=
 to exchange interface ID and addresses so that the links may be defined in=
 an unambiguous was in the BGP-LS Link NLRI for each
 of these links. This may be required for BGP-SPF or other use-cases in DC =
where we want to signal the underlying link topology for say TE.</span></i>=
</b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif;color:#1f497d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">6. Likewise Neighbor TLV seems quite unnecessary to me. To whom it wil=
l be sent ? To the peer we just established the peering with :) ? To other =
peers - why ?=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] There may be polici=
es that allow a peering to be accepted on a specific link. It would be good=
 to avoid one side trying setup a BGP session while the
 other does not wish to. This mechanism allows establishment of a 2-way sta=
te at each link level before the BGP session establishment happens and also=
 to ensure that the =E2=80=9Cpeering route=E2=80=9D is actually setup over =
that link.</span></i></b><span style=3D"font-size:11.0pt;font-family:&quot;=
Calibri&quot;,sans-serif;color:#1f497d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">7. One of the fundamental element of all BGP peerings is ability to de=
tect peering liveness without tuning down BGP holdtime timer. Yet this prop=
osal does not mention nor signal a bit about say
 BFD to be used mutually by both sides on the discovered links.=C2=A0<u></u=
><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Yes, this was not c=
overed explicitly but can be done optionally. The desire to run BFD is one =
such attribute that may be signaled using the link attribute
 TLV.</span></i></b><span style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;color:#1f497d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">8. The draft is also pretty silent on how often the BGP HELLOs=C2=A0 w=
ill be sent. For example is there an exponential timer allowing to slow dow=
n when the other side is not there yet ?=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] This would be very =
similar to how IGPs or LDP run their hello which is periodic but then also =
triggered when some change or a new neighbor is learnt.</span></i></b><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color=
:#1f497d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">9.. The text I read in the last paragraph is super scary:<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0&quot;A BGP peer<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0maintains a hold timer with each Hello adjacency that it =
restarts<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0when it receives a Hello that matches the adjacency.=C2=
=A0 If the timer<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0expires without receipt of a matching Hello from the peer=
, BGP<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0concludes that the peer no longer wishes to keep BGP sess=
ion for that<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0link or that the peer has failed. The BGP peer then delet=
es the<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0Hello adjacency.=C2=A0 The route towards the BGP neighbor=
&#39;s loopback<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0address that had been dynamically created due to that BGP=
 Hello<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0adjacency SHOULD be deleted accordingly.=C2=A0 When the l=
ast Hello<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0adjacency for an BGP session is deleted, the BGP peer ter=
minates the<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0BGP session and closing the transport connection.&quot;<u=
></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Your recommendation for two octet BGP Hello Holdtime expressed in seco=
nds is 15 sec. Are you invalidating use and state machine associated with B=
GP Keepalive MSG above? I recommend this text
 is removed as it adds a lot of new mechanism to BGP state machine.=C2=A0<u=
></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d"></span></i></b></p><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small;display:inline"><b><i>=E2=80=8B=E2=80=8B</i></b></div><b><i>[K=
T] There is no intention to change the BGP state machine for the TCP sessio=
n. The hello procedure brings in its own mechanism which is gets to the sam=
e
 point where the BGP session is provisioned in existing procedure. Consider=
 that an auto-discovered BGP session is to be removed or disabled on an int=
erface. This can be done by taking that link out of this discovery mechanis=
m. Such an action should result
 in stopping the hellos and subsequently we also would like the BGP session=
 state at TCP level to be cleaned up at both ends.</i></b><span style=3D"fo=
nt-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u=
></u><u></u></span><p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">10. Do you plane to actually update BGP state machine ?=C2=A0<u></u><u=
></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] No change. However,=
 you are right that the relationship between the discovery mechanism and BG=
P state machine needs to be explained.</span></i></b><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=
<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">11. At present your auto-discovery does not mention anything about use=
 of BGP MD5 or TCP-A0. Is there an assumption that peers which are discover=
ing themselves will have those configured ? Is
 there also an assumption that I should always trust information received w=
ith BGP Hello messages ? Shouldn&#39;t we perhaps aim at private/public key=
 authentication model instead ?=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] This aspect still n=
eeds to be covered.</span></i></b><span style=3D"font-size:11.0pt;font-fami=
ly:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">12. Draft says:=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&quot;BGP hello messages are only exchanged between physically connect=
ed peers that are trustworthy.&quot;=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">How is that trust determined ? Is there an implicit assumption that BG=
P Hello is something you need to enable on a per physical interface basis w=
here you know apriori the other side of the fiber
 ? Doesn&#39;t it reduce the full automation one should expect out of this =
proposal ? Also when I peer with someone via L2 switch - still assume on a =
p2p basis - does this setup prevents me from use of BGP Hello Messages ?<u>=
</u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] While this is true =
in a DC environment, perhaps we do need to define a generic security mechan=
ism as part of this protocol extension.<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Thanks,<u></u><u></u></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Ketan</span></i></b><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Robert.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">PS. I would like to first understand the authors perspective on the ab=
ove observations before responding to Sue&#39;s WG adoption call.=C2=A0<u><=
/u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</span></div>
</div>
</div>

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

--000000000000adc46405702d5326--


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From: <bruno.decraene@orange.com>
To: Randy Bush <randy@psg.com>
CC: Interminable Discussion Room <idr@ietf.org>
Thread-Topic: [Idr] I-D Action: draft-ietf-idr-next-hop-capability-03.txt
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Randy,

Thanks for taking the time for the suggestion.
More inline

> From: Randy Bush [mailto:randy@psg.com]
 > Sent: Friday, June 29, 2018 5:11 PM
>=20
 > mornin' bruno,
 >=20
 > > I generally agree that there are cases where you don't trust the
 > > source of the information. In such case, you can filter it a priori or
 > > a posteriori.  That doesn't mean that the ability to share an
 > > information is bad.
 >=20
 > then make clear what the boundaries are and how to ameliorate this
 > exposure.  the example from ov-signal's sec cons specifically mandates
 > the defense.

Thanks for the useful example. I've also looked at a recent RFC which has p=
assed security review: BGP Large Community.
https://tools.ietf.org/html/rfc8092#section-7

Based on this, as of today, I'd propose the following text:

This document does not introduce new security vulnerabilities in BGP. Speci=
fically, an operator who is relying on the information carried
   in BGP must have a transitive trust relationship back to the source of t=
he information. Specifying the mechanism(s) to provide such a
   relationship is beyond the scope of this document. Please refer to the S=
ecurity Considerations section of <xref target=3D"RFC4271"></xref> for secu=
rity mechanisms applicable to BGP.
As this attribute is removed when the BGP Next-Hop is changed, the source o=
f the information is the router which IP address is indicated in the BGP Ne=
xt-Hop. Such Next-Hop is typically either within the AS when a BGP Next-Hop=
 Self policy is configured, or in the neighboring AS with which an intercon=
nection and an EBGP has been established. If this neighboring AS is not tru=
sted with regards to information carried in the BGP attribute, or carried i=
n a specific capability, this attribute or specific capability should be re=
moved when received. Note that in some cases, this Next-Hop may advertise i=
nformation based on information it has received from its own downstream BGP=
 Next-Hop, hence the transitive trust relationship. If the underlying trans=
port between both ASes is not trusted, BGP transport should be protected fo=
r integrity and authentification
The advertisement of BGP Next-Hop capabilities to EBGP peers may disclose, =
to the peer AS, some capabilities of the BGP node and may help fingerprinti=
ng its hardware model and software version. This may be mitigated by filter=
ing the capability advertised to EBGP peers.
Security of the Entropy Label capability advertisement is unchanged compare=
d to  <xref target=3D"RFC6790"></xref> which originally defined this signal=
ing.




Also, as per the IDR requirement for 2 implementations, I don't expect this=
 document to be sent to the IESG in the short term. Since then, I would exp=
ect improvement in term of BGP security consideration. e.g. improved transp=
ort security, guidance on BGP security considerations.=20

Thanks,
--Bruno
=20
 > randy

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From: Nikos Triantafillis <ntriantafillis@gmail.com>
Date: Thu, 5 Jul 2018 19:02:14 +0300
Message-ID: <CA+R4MGdwOssEO+Y0TvVVBBUftAMEvwXXVd0wZfXz9WtGcP75ng@mail.gmail.com>
To: idr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org,  =?UTF-8?B?w5DDrMOQwqHCu8KiKMOSw6XDj8OIKQ==?= <xiaohu.xxh@alibaba-inc.com>,  "Ketan Talaulikar (ketant)" <ketant@cisco.com>, aretana.ietf@gmail.com, John Scudder <jgs@juniper.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/UY4k-NbFH5TRjUKkzF6OjRM0BWM>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hi,

I'm not aware of any IPR related to this draft.

Regards,

Nikos.-

From: Susan Hares <shares@ndzh.com> <shares@ndzh.com&gt>;
Sent: 02 July 2018 22:39
To: idr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org; '=C3=90=C3=AC=C3=90=C2=A1=
=C2=BB=C2=A2(=C3=92=C3=A5=C3=8F=C3=88)'
<xiaohu.xxh@alibaba-inc.com> <xiaohu.xxh@alibaba-inc.com&gt>;; Ketan
Talaulikar (ketant) <ketant@cisco.com> <ketant@cisco.com&gt>;;
aretana.ietf@gmail.com; 'John Scudder' <jgs@juniper.net>
<jgs@juniper.net&gt>;
Subject: WG adoption call for draft-xu-idr-neighbor-autodiscovery

Greetings:

This begins a 2 week WG adoption call for
draft-xu-idr-neighbor-autodiscovery (July 2 =C2=A8C July 16).
https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

The authors of this draft should send their IPR statements in response
to this email.  I hope the authors will ihelp their vacationing
co-authors to respond by July 7th.

The WG should consider the following:

1)     Does BGP need to have an autodiscovery mechanism for peers
within Data Centers?

2)     Does this mechanism work for other deployments?



3)     If so, should be passed in BGP Hello message?

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).


4)     Does this interact with any of the LSVR work?

I want to thank the authors for their patience while we sorted through
some of the WG LC for other drafts.  We decided to wait until some of
those discussion were cleared up prior to starting a new WG Adoption
call.


Susan Hares


   - [Idr] WG adoption call for draft-xu-idr-neighbo...
   <https://mailarchive.ietf.org/arch/msg/idr/7lxaNCosHpnq77SdssuX-pGL9QA>
 Susan
   Hares
   - Re: [Idr] WG adoption call for draft-xu-idr-nei...
   <https://mailarchive.ietf.org/arch/msg/idr/AlDp6t6hkf9s3jmObdqRQGeYASc>
     =3D?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=3D?=3D
   - Re: [Idr] WG adoption call for draft-xu-idr-nei...
   <https://mailarchive.ietf.org/arch/msg/idr/GP2oXOzjP3PoJW_FYk4YMWl87x8>
 Jeff
   Tantsura
   - Re: [Idr] WG adoption call for draft-xu-idr-nei...
   <https://mailarchive.ietf.org/arch/msg/idr/bPQu385CD1-DD5PCm-jvBEs6H3s>
 Ketan
   Talaulikar (ketant)

--000000000000bce17c057042abce
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<div dir=3D"ltr"><div id=3D"gmail-msg-body">Hi,</div><div><br></div><div>I&=
#39;m not aware of any IPR related to this draft.</div><div><br></div><div>=
Regards,</div><div><br></div><div>Nikos.-<br></div><div id=3D"gmail-msg-bod=
y"><div id=3D"gmail-msg-payload"><pre class=3D"gmail-wordwrap">From: Susan =
Hares &lt;<a href=3D"mailto:shares@ndzh.com&amp;gt">shares@ndzh.com&gt;</a>=
;
Sent: 02 July 2018 22:39
To: <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>
Cc: <a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">draft-x=
u-idr-neighbor-autodiscovery@ietf.org</a>; &#39;=C3=90=C3=AC=C3=90=C2=A1=C2=
=BB=C2=A2(=C3=92=C3=A5=C3=8F=C3=88)&#39; &lt;<a href=3D"mailto:xiaohu.xxh@a=
libaba-inc.com&amp;gt">xiaohu.xxh@alibaba-inc.com&gt;</a>;; Ketan Talaulika=
r (ketant) &lt;<a href=3D"mailto:ketant@cisco.com&amp;gt">ketant@cisco.com&=
gt;</a>;; <a href=3D"mailto:aretana.ietf@gmail.com">aretana.ietf@gmail.com<=
/a>; &#39;John Scudder&#39; &lt;<a href=3D"mailto:jgs@juniper.net&amp;gt">j=
gs@juniper.net&gt;</a>;
Subject: WG adoption call for draft-xu-idr-neighbor-autodiscovery

Greetings:

This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscove=
ry (July 2 =C2=A8C July 16).

<a href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodisco=
very/" rel=3D"nofollow">https://datatracker.ietf.org/doc/draft-xu-idr-neigh=
bor-autodiscovery/</a>

The authors of this draft should send their IPR statements in response to t=
his email.  I hope the authors will ihelp their vacationing co-authors to r=
espond by July 7th.

The WG should consider the following:

1)     Does BGP need to have an autodiscovery mechanism for peers within Da=
ta Centers?

2)     Does this mechanism work for other deployments?



3)     If so, should be passed in BGP Hello message?

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).


4)     Does this interact with any of the LSVR work?

I want to thank the authors for their patience while we sorted through some=
 of the WG LC for other drafts.  We decided to wait until some of those dis=
cussion were cleared up prior to starting a new WG Adoption call.


Susan Hares
</pre>
     =20
    </div>
    <div>
     =20
    </div>
</div>=20


      <div id=3D"gmail-message-thread">

       =20
<ul class=3D"gmail-thread-snippet">

    <li class=3D"gmail-depth-0"><a href=3D"https://mailarchive.ietf.org/arc=
h/msg/idr/7lxaNCosHpnq77SdssuX-pGL9QA">[Idr] WG adoption call for draft-xu-=
idr-neighbo...</a>=C2=A0=C2=A0Susan Hares</li>

    <li class=3D"gmail-depth-1"><a href=3D"https://mailarchive.ietf.org/arc=
h/msg/idr/AlDp6t6hkf9s3jmObdqRQGeYASc">Re: [Idr] WG adoption call for draft=
-xu-idr-nei...</a>=C2=A0=C2=A0=3D?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=3D?=3D</l=
i>

    <li class=3D"gmail-depth-1"><a href=3D"https://mailarchive.ietf.org/arc=
h/msg/idr/GP2oXOzjP3PoJW_FYk4YMWl87x8">Re: [Idr] WG adoption call for draft=
-xu-idr-nei...</a>=C2=A0=C2=A0Jeff Tantsura</li>

    <li class=3D"gmail-depth-1 gmail-current-msg"><a href=3D"https://mailar=
chive.ietf.org/arch/msg/idr/bPQu385CD1-DD5PCm-jvBEs6H3s">Re: [Idr] WG adopt=
ion call for draft-xu-idr-nei...</a>=C2=A0=C2=A0Ketan Talaulikar (ketant)</=
li>

</ul>


      </div><br></div>

--000000000000bce17c057042abce--


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Hi All,

A few people have contacted the chairs to express dismay about our being sc=
heduled in the coveted last Friday slot. We are not any more excited about =
it than you are (I had to change my return flight) but it is not an adminis=
trative error -- as those of us who follow the IETF organizational stuff at=
 all know, the IETF meets all week, including Friday. We just were the ones=
 who lost the lottery, this time.

Anyway, I wanted to make sure you all knew we're scheduled Friday 11:50 - 1=
3:20. If you look at the agenda Jie posted yesterday you will see we will l=
ikely use most of that time slot.

Thanks (& sorry),

--John=


From nobody Thu Jul  5 15:43:40 2018
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From: Job Snijders <job@instituut.net>
Date: Fri, 6 Jul 2018 00:42:58 +0200
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To: John Scudder <jgs@juniper.net>
Cc: "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] Note Friday IDR session
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Don=E2=80=99t be sorry!

On Thu, 5 Jul 2018 at 20:38, John Scudder <jgs@juniper.net> wrote:

> Hi All,
>
> A few people have contacted the chairs to express dismay about our being
> scheduled in the coveted last Friday slot. We are not any more excited
> about it than you are (I had to change my return flight) but it is not an
> administrative error -- as those of us who follow the IETF organizational
> stuff at all know, the IETF meets all week, including Friday. We just wer=
e
> the ones who lost the lottery, this time.
>
> Anyway, I wanted to make sure you all knew we're scheduled Friday 11:50 -
> 13:20. If you look at the agenda Jie posted yesterday you will see we wil=
l
> likely use most of that time slot.
>
> Thanks (& sorry),
>
> --John
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

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<div><div dir=3D"auto">Don=E2=80=99t be sorry!</div></div><div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr">On Thu, 5 Jul 2018 at 20:38, John Scudd=
er &lt;<a href=3D"mailto:jgs@juniper.net">jgs@juniper.net</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">Hi All,<br>
<br>
A few people have contacted the chairs to express dismay about our being sc=
heduled in the coveted last Friday slot. We are not any more excited about =
it than you are (I had to change my return flight) but it is not an adminis=
trative error -- as those of us who follow the IETF organizational stuff at=
 all know, the IETF meets all week, including Friday. We just were the ones=
 who lost the lottery, this time.<br>
<br>
Anyway, I wanted to make sure you all knew we&#39;re scheduled Friday 11:50=
 - 13:20. If you look at the agenda Jie posted yesterday you will see we wi=
ll likely use most of that time slot.<br>
<br>
Thanks (&amp; sorry),<br>
<br>
--John<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/idr</a><br>
</blockquote></div></div>

--000000000000e22cf10570484524--


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Date: Thu, 05 Jul 2018 16:27:21 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Job Snijders <job@instituut.net>, John Scudder <jgs@juniper.net>
CC: "idr@ietf.org" <idr@ietf.org>
Message-ID: <55193C50-FE75-4591-9970-5D049382B8CF@gmail.com>
Thread-Topic: [Idr] Note Friday IDR session
References: <C6020853-541F-4D1D-8D96-8E7EAA6767F2@juniper.net> <CACWOCC-jWpSRnZvDpJcJTjGfG_5uFKSTcnVe_E52-RwAsrFKSA@mail.gmail.com>
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+1

>From time to time we all get last IETF day slots, this is part of the fair =
allocation process, nothing to be sorry about!=20

=20

Cheers,

Jeff

=20

From: Idr <idr-bounces@ietf.org> on behalf of Job Snijders <job@instituut.n=
et>
Date: Thursday, July 5, 2018 at 15:45
To: John Scudder <jgs@juniper.net>
Cc: "idr@ietf.org" <idr@ietf.org>
Subject: Re: [Idr] Note Friday IDR session

=20

Don=E2=80=99t be sorry!

=20

On Thu, 5 Jul 2018 at 20:38, John Scudder <jgs@juniper.net> wrote:

Hi All,

A few people have contacted the chairs to express dismay about our being sc=
heduled in the coveted last Friday slot. We are not any more excited about i=
t than you are (I had to change my return flight) but it is not an administr=
ative error -- as those of us who follow the IETF organizational stuff at al=
l know, the IETF meets all week, including Friday. We just were the ones who=
 lost the lottery, this time.

Anyway, I wanted to make sure you all knew we're scheduled Friday 11:50 - 1=
3:20. If you look at the agenda Jie posted yesterday you will see we will li=
kely use most of that time slot.

Thanks (& sorry),

--John
_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr

_______________________________________________ Idr mailing list Idr@ietf.o=
rg https://www.ietf.org/mailman/listinfo/idr=20


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urple><div class=3DWordSection1><p class=3DMsoNormal>+1<o:p></o:p></p><p class=3DM=
soNormal>From time to time we all get last IETF day slots, this is part of t=
he fair allocation process, nothing to be sorry about! <o:p></o:p></p><p cla=
ss=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal><span style=3D'color=
:black'>Cheers,<o:p></o:p></span></p></div><p class=3DMsoNormal><span style=3D'c=
olor:black'>Jeff</span><o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></=
p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0=
in 0in'><p class=3DMsoNormal><b><span style=3D'font-size:12.0pt;color:black'>Fro=
m: </span></b><span style=3D'font-size:12.0pt;color:black'>Idr &lt;idr-bounces=
@ietf.org&gt; on behalf of Job Snijders &lt;job@instituut.net&gt;<br><b>Date=
: </b>Thursday, July 5, 2018 at 15:45<br><b>To: </b>John Scudder &lt;jgs@jun=
iper.net&gt;<br><b>Cc: </b>&quot;idr@ietf.org&quot; &lt;idr@ietf.org&gt;<br>=
<b>Subject: </b>Re: [Idr] Note Friday IDR session<o:p></o:p></span></p></div=
><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><div><p class=3DMsoNo=
rmal>Don=E2=80=99t be sorry!<o:p></o:p></p></div></div><div><p class=3DMsoNormal><o:=
p>&nbsp;</o:p></p><div><div><p class=3DMsoNormal>On Thu, 5 Jul 2018 at 20:38, =
John Scudder &lt;<a href=3D"mailto:jgs@juniper.net">jgs@juniper.net</a>&gt; wr=
ote:<o:p></o:p></p></div><blockquote style=3D'border:none;border-left:solid #C=
CCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p=
 class=3DMsoNormal>Hi All,<br><br>A few people have contacted the chairs to ex=
press dismay about our being scheduled in the coveted last Friday slot. We a=
re not any more excited about it than you are (I had to change my return fli=
ght) but it is not an administrative error -- as those of us who follow the =
IETF organizational stuff at all know, the IETF meets all week, including Fr=
iday. We just were the ones who lost the lottery, this time.<br><br>Anyway, =
I wanted to make sure you all knew we're scheduled Friday 11:50 - 13:20. If =
you look at the agenda Jie posted yesterday you will see we will likely use =
most of that time slot.<br><br>Thanks (&amp; sorry),<br><br>--John<br>______=
_________________________________________<br>Idr mailing list<br><a href=3D"ma=
ilto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br><a href=3D"https://www.=
ietf.org/mailman/listinfo/idr" target=3D"_blank">https://www.ietf.org/mailman/=
listinfo/idr</a><o:p></o:p></p></blockquote></div></div><p class=3DMsoNormal>_=
______________________________________________ Idr mailing list Idr@ietf.org=
 https://www.ietf.org/mailman/listinfo/idr <o:p></o:p></p></div></body></htm=
l>

--B_3613652843_870427355--



From nobody Fri Jul  6 01:06:34 2018
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From: Loa Andersson <loa@pi.nu>
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Subject: Re: [Idr] Note Friday IDR session
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Folks,

For me this actually works the other way, for the last couple of
meetings I have had conflicts that stopped me from attending the
idr-meetings. This meeting there is no such conflict. Also with
bess on Friday morning, the Friday will be an interesting day, well
worth attending.

/Loa

On 2018-07-06 01:27, Jeff Tantsura wrote:
> +1
> 
>  From time to time we all get last IETF day slots, this is part of the 
> fair allocation process, nothing to be sorry about!
> 
> Cheers,
> 
> Jeff
> 
> *From: *Idr <idr-bounces@ietf.org> on behalf of Job Snijders 
> <job@instituut.net>
> *Date: *Thursday, July 5, 2018 at 15:45
> *To: *John Scudder <jgs@juniper.net>
> *Cc: *"idr@ietf.org" <idr@ietf.org>
> *Subject: *Re: [Idr] Note Friday IDR session
> 
> Donâ€™t be sorry!
> 
> On Thu, 5 Jul 2018 at 20:38, John Scudder <jgs@juniper.net 
> <mailto:jgs@juniper.net>> wrote:
> 
>     Hi All,
> 
>     A few people have contacted the chairs to express dismay about our
>     being scheduled in the coveted last Friday slot. We are not any more
>     excited about it than you are (I had to change my return flight) but
>     it is not an administrative error -- as those of us who follow the
>     IETF organizational stuff at all know, the IETF meets all week,
>     including Friday. We just were the ones who lost the lottery, this time.
> 
>     Anyway, I wanted to make sure you all knew we're scheduled Friday
>     11:50 - 13:20. If you look at the agenda Jie posted yesterday you
>     will see we will likely use most of that time slot.
> 
>     Thanks (& sorry),
> 
>     --John
>     _______________________________________________
>     Idr mailing list
>     Idr@ietf.org <mailto:Idr@ietf.org>
>     https://www.ietf.org/mailman/listinfo/idr
> 
> _______________________________________________ Idr mailing list 
> Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
> 
> 
> 
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
> 

-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


From nobody Mon Jul  9 13:13:55 2018
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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Subject: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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--_000_4A95BA014132FF49AE685FAB4B9F17F66B0A7BA3sjceml521mbschi_
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Eric,

draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of mult=
iple UPDATE messages with Tunnel Encap attributes.

Is it possible to have following capability?

-        Have a bit indicating a specific UPDATE is from authoritative sour=
ce, therefore overwrite all other Tunnel Attributes for the Prefix X to avo=
id recursive next hop issues and tunnel selection at the receiving Router?

-        Have a bit indicating that a specific UPDATE only contain Tunnel a=
ttributes for the receiving Router, therefore can't be forwarded?


You said that SAFI 7 is deprecated because no one seemed interested in usin=
g it. We are very interested in using it because

-        it can be easily distinguished from normal  BGP UPDATE

-         The receiving router doesn't have to "Filter" the tunnel attribut=
es before forwarding to others.

-        Can even be used for passing reconfigured IPsec keys to two ends o=
f a tunnel.

Therefore we think SAFI 7 should be reserved.

Thanks, Linda Dunbar

From: Eric C Rosen [mailto:erosen@juniper.net]
Sent: Tuesday, July 03, 2018 12:21 PM
To: Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org; draft-ietf-idr-tu=
nnel-encaps@ietf.org
Subject: Re: What are side effect for having Encap SAFI? can draft-ietf-idr=
-tunnel-encaps-09 preserve trigger tunnel creation before VPN is establishe=
d?

On 7/2/2018 6:31 PM, Linda Dunbar wrote:

Eric, IDR group,

It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tunnel-enc=
aps. But draft-ietf-idr-tunnel-encaps-09 stated that it deprecates the
Encapsulation SAFI.

We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For exa=
mple, a Controller (say RR) can send an update with Encapsulation SAFI to t=
wo end points to trigger a tunnel establishment between them.
What are side effect for having Encap SAFI? Can we preserve it in draft-iet=
f-idr-tunnel-encaps?

Thanks, Linda Dunbar


SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was=
 discouraging folks from actually using the Tunnel Encapsulation attribute.=
  This is discussed briefly in section 1.2 of the draft.

You can get a similar effect by using the technique described in section 7 =
of the draft.

If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute (wi=
th PE1 as remote endpoint) on this UPDATE.  (The next hop field of this UPD=
ATE doesn't really matter, as long as it is resolvable.)  When PE1 originat=
es VPN routes, it sets the next hop to be its loopback address.  Per sectio=
n 7, this will result in packets being sent to PE1 though the specified tun=
nel.



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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Eric, <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">draft-ietf-idr-tunnel-=
encaps-09 discussed ways to resolve conflicts of multiple UPDATE messages w=
ith Tunnel Encap attributes.
<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">Is it possible to have=
 following capability?
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Have a bit ind=
icating a specific UPDATE is from authoritative source, therefore overwrite=
 all other Tunnel Attributes for the Prefix X to avoid recursive next hop i=
ssues and tunnel selection at the
 receiving Router? <o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Have a bit ind=
icating that a specific UPDATE only contain Tunnel attributes for the recei=
ving Router, therefore can&#8217;t be forwarded?
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">You said that SAFI 7 i=
s deprecated because no one seemed interested in using it. We are very inte=
rested in using it because
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">it can be easi=
ly distinguished from normal &nbsp;BGP UPDATE<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">&nbsp;The rece=
iving router doesn&#8217;t have to &#8220;Filter&#8221; the tunnel attribut=
es before forwarding to others. &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Can even be us=
ed for passing reconfigured IPsec keys to two ends of a tunnel.
<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">Therefore we think SAF=
I 7 should be reserved.
<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">Thanks, Linda Dunbar<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"color:#1F=
497D"><o:p>&nbsp;</o:p></span></a></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"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Eric C Rosen [mailto:erosen@juniper.net]
<br>
<b>Sent:</b> Tuesday, July 03, 2018 12:21 PM<br>
<b>To:</b> Linda Dunbar &lt;linda.dunbar@huawei.com&gt;; idr@ietf.org; draf=
t-ietf-idr-tunnel-encaps@ietf.org<br>
<b>Subject:</b> Re: What are side effect for having Encap SAFI? can draft-i=
etf-idr-tunnel-encaps-09 preserve trigger tunnel creation before VPN is est=
ablished?<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">On 7/2/2018 6:31 PM, Linda Dunbar wrote:<br>
<br>
<span style=3D"font-size:12.0pt"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Eric, IDR group, </spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"color:#=
1F497D">It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tu=
nnel-encaps. But draft-ietf-idr-tunnel-encaps-09 stated that it
</span><span style=3D"font-size:10.0pt;font-family:Courier;color:windowtext=
">deprecates the</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">Encapsulation SAFI.
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">We find the Encapsulat=
ion SAFI is quite useful for CPE based EVPN. &nbsp;For example, a Controlle=
r (say RR) can send an update with Encapsulation SAFI to two end points to =
trigger a tunnel establishment between them.
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">What are side effect f=
or having Encap SAFI? Can we preserve it in draft-ietf-idr-tunnel-encaps?</=
span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks, Linda Dunbar</=
span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><br>
SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was=
 discouraging folks from actually using the Tunnel Encapsulation attribute.=
&nbsp; This is discussed briefly in section
 1.2 of the draft.<br>
<br>
You can get a similar effect by using the technique described in section 7 =
of the draft.<br>
<br>
If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1's loopback address.&nbsp; Put the Tunnel Encapsulation attribut=
e (with PE1 as remote endpoint) on this UPDATE.&nbsp; (The next hop field o=
f this UPDATE doesn't really matter, as long
 as it is resolvable.)&nbsp; When PE1 originates VPN routes, it sets the ne=
xt hop to be its loopback address.&nbsp; Per section 7, this will result in=
 packets being sent to PE1 though the specified tunnel.<br>
<br>
&nbsp;<o:p></o:p></span></p>
</div>
</body>
</html>

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Date: Mon, 09 Jul 2018 13:24:33 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Linda Dunbar <linda.dunbar@huawei.com>, Eric C Rosen <erosen@juniper.net>,  "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Hi Linda,

=20

Why would you want to build what you are trying to do into protocol?

#1 local policy

#2 =C2=A0NO_ADVERTISE does that exactly=20

=20

Cheers,

Jeff

=20

From: Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <linda.dunbar@hu=
awei.com>
Date: Monday, July 9, 2018 at 13:14
To: Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draf=
t-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Subject: [Idr] Possible to set up priority for Tunnels established by draft=
-ietf-idr-tunnel-encaps-09 ?

=20

Eric,=20

=20

draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of mult=
iple UPDATE messages with Tunnel Encap attributes.=20

=20

Is it possible to have following capability?=20
Have a bit indicating a specific UPDATE is from authoritative source, there=
fore overwrite all other Tunnel Attributes for the Prefix X to avoid recursi=
ve next hop issues and tunnel selection at the receiving Router?=20
Have a bit indicating that a specific UPDATE only contain Tunnel attributes=
 for the receiving Router, therefore can=E2=80=99t be forwarded?=20
=20

You said that SAFI 7 is deprecated because no one seemed interested in usin=
g it. We are very interested in using it because=20
it can be easily distinguished from normal  BGP UPDATE
 The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes =
before forwarding to others. =20
Can even be used for passing reconfigured IPsec keys to two ends of a tunne=
l.=20
=20

Therefore we think SAFI 7 should be reserved.=20

=20

Thanks, Linda Dunbar

=20

From: Eric C Rosen [mailto:erosen@juniper.net]=20
Sent: Tuesday, July 03, 2018 12:21 PM
To: Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org; draft-ietf-idr-tu=
nnel-encaps@ietf.org
Subject: Re: What are side effect for having Encap SAFI? can draft-ietf-idr=
-tunnel-encaps-09 preserve trigger tunnel creation before VPN is established=
?

=20

On 7/2/2018 6:31 PM, Linda Dunbar wrote:



Eric, IDR group,=20

=20

It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tunnel-enc=
aps. But draft-ietf-idr-tunnel-encaps-09 stated that it deprecates the

Encapsulation SAFI.=20

=20

We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For exa=
mple, a Controller (say RR) can send an update with Encapsulation SAFI to tw=
o end points to trigger a tunnel establishment between them.=20

What are side effect for having Encap SAFI? Can we preserve it in draft-iet=
f-idr-tunnel-encaps?

=20

Thanks, Linda Dunbar

=20


SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was =
discouraging folks from actually using the Tunnel Encapsulation attribute.  =
This is discussed briefly in section 1.2 of the draft.

You can get a similar effect by using the technique described in section 7 =
of the draft.

If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute (wit=
h PE1 as remote endpoint) on this UPDATE.  (The next hop field of this UPDAT=
E doesn't really matter, as long as it is resolvable.)  When PE1 originates =
VPN routes, it sets the next hop to be its loopback address.  Per section 7,=
 this will result in packets being sent to PE1 though the specified tunnel.

=20

_______________________________________________ Idr mailing list Idr@ietf.o=
rg https://www.ietf.org/mailman/listinfo/idr=20


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--></style></head><body lang=3DEN-US link=3D"#0563C1" vlink=3D"#954F72"><div clas=
s=3DWordSection1><p class=3DMsoNormal><span style=3D'color:windowtext'>Hi Linda,<o=
:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:windowtext'><o:p>&=
nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'color:windowtext'>Why =
would you want to build what you are trying to do into protocol?<o:p></o:p><=
/span></p><p class=3DMsoNormal><span style=3D'color:windowtext'>#1 local policy<=
o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:windowtext'>#2 =C2=A0=
NO_ADVERTISE does that exactly <o:p></o:p></span></p><p class=3DMsoNormal><spa=
n style=3D'color:windowtext'><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNorm=
al>Cheers,<o:p></o:p></p></div><p class=3DMsoNormal>Jeff<span style=3D'color:win=
dowtext'><o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:windowt=
ext'><o:p>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid #B=
5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'fo=
nt-size:12.0pt'>From: </span></b><span style=3D'font-size:12.0pt'>Idr &lt;idr-=
bounces@ietf.org&gt; on behalf of Linda Dunbar &lt;linda.dunbar@huawei.com&g=
t;<br><b>Date: </b>Monday, July 9, 2018 at 13:14<br><b>To: </b>Eric C Rosen =
&lt;erosen@juniper.net&gt;, &quot;idr@ietf.org&quot; &lt;idr@ietf.org&gt;, &=
quot;draft-ietf-idr-tunnel-encaps@ietf.org&quot; &lt;draft-ietf-idr-tunnel-e=
ncaps@ietf.org&gt;<br><b>Subject: </b>[Idr] Possible to set up priority for =
Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?<o:p></o:p></span></=
p></div><div><p class=3DMsoNormal><span style=3D'color:windowtext'><o:p>&nbsp;</=
o:p></span></p></div><p class=3DMsoNormal><span style=3D'color:#1F497D'>Eric, </=
span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</s=
pan><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>draft-ietf=
-idr-tunnel-encaps-09 discussed ways to resolve conflicts of multiple UPDATE=
 messages with Tunnel Encap attributes. </span><o:p></o:p></p><p class=3DMsoNo=
rmal><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNor=
mal><span style=3D'color:#1F497D'>Is it possible to have following capability?=
 </span><o:p></o:p></p><ul style=3D'margin-top:0in' type=3Ddisc><li class=3DMsoLis=
tParagraph style=3D'margin-left:0in;mso-list:l0 level1 lfo2'><span style=3D'colo=
r:#1F497D'>Have a bit indicating a specific UPDATE is from authoritative sou=
rce, therefore overwrite all other Tunnel Attributes for the Prefix X to avo=
id recursive next hop issues and tunnel selection at the receiving Router? <=
/span><o:p></o:p></li><li class=3DMsoListParagraph style=3D'margin-left:0in;mso-=
list:l0 level1 lfo2'><span style=3D'color:#1F497D'>Have a bit indicating that =
a specific UPDATE only contain Tunnel attributes for the receiving Router, t=
herefore can=E2=80=99t be forwarded? </span><o:p></o:p></li></ul><p class=3DMsoListP=
aragraph><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMs=
oNormal><span style=3D'color:#1F497D'>You said that SAFI 7 is deprecated becau=
se no one seemed interested in using it. We are very interested in using it =
because </span><o:p></o:p></p><ul style=3D'margin-top:0in' type=3Ddisc><li class=
=3DMsoListParagraph style=3D'margin-left:0in;mso-list:l0 level1 lfo2'><span styl=
e=3D'color:#1F497D'>it can be easily distinguished from normal &nbsp;BGP UPDAT=
E</span><o:p></o:p></li><li class=3DMsoListParagraph style=3D'margin-left:0in;ms=
o-list:l0 level1 lfo2'><span style=3D'color:#1F497D'>&nbsp;The receiving route=
r doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes before forwarding to =
others. &nbsp;</span><o:p></o:p></li><li class=3DMsoListParagraph style=3D'margi=
n-left:0in;mso-list:l0 level1 lfo2'><span style=3D'color:#1F497D'>Can even be =
used for passing reconfigured IPsec keys to two ends of a tunnel. </span><o:=
p></o:p></li></ul><p class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>Therefore we=
 think SAFI 7 should be reserved. </span><o:p></o:p></p><p class=3DMsoNormal><=
span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><s=
pan style=3D'color:#1F497D'>Thanks, Linda Dunbar</span><o:p></o:p></p><p class=
=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><div><div=
 style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in=
'><p class=3DMsoNormal><b><span style=3D'color:windowtext'>From:</span></b><span=
 style=3D'color:windowtext'> Eric C Rosen [mailto:erosen@juniper.net] <br><b>S=
ent:</b> Tuesday, July 03, 2018 12:21 PM<br><b>To:</b> Linda Dunbar &lt;lind=
a.dunbar@huawei.com&gt;; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org=
<br><b>Subject:</b> Re: What are side effect for having Encap SAFI? can draf=
t-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before VPN is e=
stablished?</span><o:p></o:p></p></div></div><p class=3DMsoNormal>&nbsp;<o:p><=
/o:p></p><p class=3DMsoNormal>On 7/2/2018 6:31 PM, Linda Dunbar wrote:<br><br>=
<br><o:p></o:p></p><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'>=
<p class=3DMsoNormal><span style=3D'color:#1F497D'>Eric, IDR group, </span><o:p>=
</o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><o:p><=
/o:p></p><p class=3DMsoNormal style=3D'text-autospace:none'><span style=3D'color:#=
1F497D'>It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tun=
nel-encaps. But draft-ietf-idr-tunnel-encaps-09 stated that it </span><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>deprecates the=
</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-=
family:Courier;color:windowtext'>Encapsulation SAFI. </span><o:p></o:p></p><=
p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:Courier;color:wi=
ndowtext'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:=
#1F497D'>We find the Encapsulation SAFI is quite useful for CPE based EVPN. =
&nbsp;For example, a Controller (say RR) can send an update with Encapsulati=
on SAFI to two end points to trigger a tunnel establishment between them. </=
span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>What are =
side effect for having Encap SAFI? Can we preserve it in draft-ietf-idr-tunn=
el-encaps?</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D=
'>Thanks, Linda Dunbar</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'=
color:#1F497D'>&nbsp;</span><o:p></o:p></p></blockquote><p class=3DMsoNormal><=
span style=3D'font-size:12.0pt;font-family:"Times New Roman",serif'><br>SAFI 7=
 was deprecated because no one seemed interested in using it, it creates add=
itional operational issues, there is no real need for it, and it was discour=
aging folks from actually using the Tunnel Encapsulation attribute.&nbsp; Th=
is is discussed briefly in section 1.2 of the draft.<br><br>You can get a si=
milar effect by using the technique described in section 7 of the draft.<br>=
<br>If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE who=
se NLRI is PE1's loopback address.&nbsp; Put the Tunnel Encapsulation attrib=
ute (with PE1 as remote endpoint) on this UPDATE.&nbsp; (The next hop field =
of this UPDATE doesn't really matter, as long as it is resolvable.)&nbsp; Wh=
en PE1 originates VPN routes, it sets the next hop to be its loopback addres=
s.&nbsp; Per section 7, this will result in packets being sent to PE1 though=
 the specified tunnel.<br><br>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal=
><span style=3D'color:windowtext'>____________________________________________=
___ Idr mailing list Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr =
<o:p></o:p></span></p></div></body></html>

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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Date: Mon, 09 Jul 2018 13:34:56 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Linda Dunbar <linda.dunbar@huawei.com>, Eric C Rosen <erosen@juniper.net>,  "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Linda,

=20

You meant to say =E2=80=93 you=E2=80=99d use RR to distribute information injected from=
 and by a controller?

Reflector (as the name suggests) reflects the routes, it doesn=E2=80=99t originat=
es them as part of the reflector functionality =C2=A0(it for sure could as a BGP=
 speaker if such functionality is collocated with RR)

=20

Please read my initial questions, it looks like what you are trying to achi=
eve could be done with the existing technology.

Thanks!

=20

Cheers,

Jeff

=20

From: Linda Dunbar <linda.dunbar@huawei.com>
Date: Monday, July 9, 2018 at 13:28
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.n=
et>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" =
<draft-ietf-idr-tunnel-encaps@ietf.org>
Subject: RE: [Idr] Possible to set up priority for Tunnels established by d=
raft-ietf-idr-tunnel-encaps-09 ?

=20

Jeff,=20

=20

We would like to use RR as controller to distribute more detailed tunnel in=
formation, such as IPsec configuration & keys because in managed large scale=
 Overlay deployment (SD-WAN), it doesn=E2=80=99t scale to allow all CPEs to negoti=
ate IPsec keys.=20

=20

Linda

=20

From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]=20
Sent: Monday, July 09, 2018 3:25 PM
To: Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <erosen@juniper.ne=
t>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
Subject: Re: [Idr] Possible to set up priority for Tunnels established by d=
raft-ietf-idr-tunnel-encaps-09 ?

=20

Hi Linda,

=20

Why would you want to build what you are trying to do into protocol?

#1 local policy

#2  NO_ADVERTISE does that exactly=20

=20

Cheers,

Jeff

=20

From: Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <linda.dunbar@hu=
awei.com>
Date: Monday, July 9, 2018 at 13:14
To: Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draf=
t-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Subject: [Idr] Possible to set up priority for Tunnels established by draft=
-ietf-idr-tunnel-encaps-09 ?

=20

Eric,=20

=20

draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of mult=
iple UPDATE messages with Tunnel Encap attributes.=20

=20

Is it possible to have following capability?=20
Have a bit indicating a specific UPDATE is from authoritative source, there=
fore overwrite all other Tunnel Attributes for the Prefix X to avoid recursi=
ve next hop issues and tunnel selection at the receiving Router?=20
Have a bit indicating that a specific UPDATE only contain Tunnel attributes=
 for the receiving Router, therefore can=E2=80=99t be forwarded?=20
=20

You said that SAFI 7 is deprecated because no one seemed interested in usin=
g it. We are very interested in using it because=20
it can be easily distinguished from normal  BGP UPDATE
 The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes =
before forwarding to others. =20
Can even be used for passing reconfigured IPsec keys to two ends of a tunne=
l.=20
=20

Therefore we think SAFI 7 should be reserved.=20

=20

Thanks, Linda Dunbar

=20

From: Eric C Rosen [mailto:erosen@juniper.net]=20
Sent: Tuesday, July 03, 2018 12:21 PM
To: Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org; draft-ietf-idr-tu=
nnel-encaps@ietf.org
Subject: Re: What are side effect for having Encap SAFI? can draft-ietf-idr=
-tunnel-encaps-09 preserve trigger tunnel creation before VPN is established=
?

=20

On 7/2/2018 6:31 PM, Linda Dunbar wrote:



Eric, IDR group,=20

=20

It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tunnel-enc=
aps. But draft-ietf-idr-tunnel-encaps-09 stated that it deprecates the

Encapsulation SAFI.=20

=20

We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For exa=
mple, a Controller (say RR) can send an update with Encapsulation SAFI to tw=
o end points to trigger a tunnel establishment between them.=20

What are side effect for having Encap SAFI? Can we preserve it in draft-iet=
f-idr-tunnel-encaps?

=20

Thanks, Linda Dunbar

=20


SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was =
discouraging folks from actually using the Tunnel Encapsulation attribute.  =
This is discussed briefly in section 1.2 of the draft.

You can get a similar effect by using the technique described in section 7 =
of the draft.

If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute (wit=
h PE1 as remote endpoint) on this UPDATE.  (The next hop field of this UPDAT=
E doesn't really matter, as long as it is resolvable.)  When PE1 originates =
VPN routes, it sets the next hop to be its loopback address.  Per section 7,=
 this will result in packets being sent to PE1 though the specified tunnel.

=20

_______________________________________________ Idr mailing list Idr@ietf.o=
rg https://www.ietf.org/mailman/listinfo/idr=20


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--></style></head><body lang=3DEN-US link=3D"#0563C1" vlink=3D"#954F72"><div clas=
s=3DWordSection1><p class=3DMsoNormal><span style=3D'color:windowtext'>Linda,<o:p>=
</o:p></span></p><p class=3DMsoNormal><span style=3D'color:windowtext'><o:p>&nbs=
p;</o:p></span></p><p class=3DMsoNormal><span style=3D'color:windowtext'>You mea=
nt to say =E2=80=93 you=E2=80=99d use RR to distribute information injected from and by =
a controller?<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:win=
dowtext'>Reflector (as the name suggests) reflects the routes, it doesn=E2=80=99t =
originates them as part of the reflector functionality =C2=A0(it for sure could =
as a BGP speaker if such functionality is collocated with RR)<o:p></o:p></sp=
an></p><p class=3DMsoNormal><span style=3D'color:windowtext'><o:p>&nbsp;</o:p></=
span></p><p class=3DMsoNormal><span style=3D'color:windowtext'>Please read my in=
itial questions, it looks like what you are trying to achieve could be done =
with the existing technology.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:windowtext'>Thanks!<o:p></o:p></span></p><p class=3DMsoNormal><sp=
an style=3D'color:windowtext'><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNor=
mal>Cheers,<o:p></o:p></p></div><p class=3DMsoNormal>Jeff<span style=3D'color:wi=
ndowtext'><o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'color:window=
text'><o:p>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid #=
B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'f=
ont-size:12.0pt'>From: </span></b><span style=3D'font-size:12.0pt'>Linda Dunba=
r &lt;linda.dunbar@huawei.com&gt;<br><b>Date: </b>Monday, July 9, 2018 at 13=
:28<br><b>To: </b>Jeff Tantsura &lt;jefftant.ietf@gmail.com&gt;, Eric C Rose=
n &lt;erosen@juniper.net&gt;, &quot;idr@ietf.org&quot; &lt;idr@ietf.org&gt;,=
 &quot;draft-ietf-idr-tunnel-encaps@ietf.org&quot; &lt;draft-ietf-idr-tunnel=
-encaps@ietf.org&gt;<br><b>Subject: </b>RE: [Idr] Possible to set up priorit=
y for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?<o:p></o:p></s=
pan></p></div><div><p class=3DMsoNormal><span style=3D'color:windowtext'><o:p>&n=
bsp;</o:p></span></p></div><p class=3DMsoNormal><span style=3D'color:#1F497D'>Je=
ff, </span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>&nb=
sp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>We w=
ould like to use RR as controller to distribute more detailed tunnel informa=
tion, such as IPsec configuration &amp; keys because in managed large scale =
Overlay deployment (SD-WAN), it doesn=E2=80=99t scale to allow all CPEs to negotia=
te IPsec keys. </span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#=
1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1=
F497D'>Linda</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F4=
97D'>&nbsp;</span><o:p></o:p></p><div><div style=3D'border:none;border-top:sol=
id #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span styl=
e=3D'color:windowtext'>From:</span></b><span style=3D'color:windowtext'> Jeff Ta=
ntsura [mailto:jefftant.ietf@gmail.com] <br><b>Sent:</b> Monday, July 09, 20=
18 3:25 PM<br><b>To:</b> Linda Dunbar &lt;linda.dunbar@huawei.com&gt;; Eric =
C Rosen &lt;erosen@juniper.net&gt;; idr@ietf.org; draft-ietf-idr-tunnel-enca=
ps@ietf.org<br><b>Subject:</b> Re: [Idr] Possible to set up priority for Tun=
nels established by draft-ietf-idr-tunnel-encaps-09 ?</span><o:p></o:p></p><=
/div></div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'color:windowtext'>Hi Linda,</span><o:p></o:p></p><p class=3DMsoNormal><=
span style=3D'color:windowtext'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal=
><span style=3D'color:windowtext'>Why would you want to build what you are try=
ing to do into protocol?</span><o:p></o:p></p><p class=3DMsoNormal><span style=
=3D'color:windowtext'>#1 local policy</span><o:p></o:p></p><p class=3DMsoNormal>=
<span style=3D'color:windowtext'>#2 &nbsp;NO_ADVERTISE does that exactly </spa=
n><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:windowtext'>&nbsp;</s=
pan><o:p></o:p></p><div><p class=3DMsoNormal>Cheers,<o:p></o:p></p></div><p cl=
ass=3DMsoNormal>Jeff<o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:windo=
wtext'>&nbsp;</span><o:p></o:p></p><div style=3D'border:none;border-top:solid =
#B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'=
font-size:12.0pt'>From: </span></b><span style=3D'font-size:12.0pt'>Idr &lt;<a=
 href=3D"mailto:idr-bounces@ietf.org">idr-bounces@ietf.org</a>&gt; on behalf o=
f Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com">linda.dunbar@hua=
wei.com</a>&gt;<br><b>Date: </b>Monday, July 9, 2018 at 13:14<br><b>To: </b>=
Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net">erosen@juniper.net</a>&=
gt;, &quot;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&quot; &lt;<a href=3D=
"mailto:idr@ietf.org">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-ietf=
-idr-tunnel-encaps@ietf.org">draft-ietf-idr-tunnel-encaps@ietf.org</a>&quot;=
 &lt;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org">draft-ietf-idr-t=
unnel-encaps@ietf.org</a>&gt;<br><b>Subject: </b>[Idr] Possible to set up pr=
iority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?</span><o=
:p></o:p></p></div><div><p class=3DMsoNormal><span style=3D'color:windowtext'>&n=
bsp;</span><o:p></o:p></p></div><p class=3DMsoNormal><span style=3D'color:#1F497=
D'>Eric, </span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D=
'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'=
>draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of mult=
iple UPDATE messages with Tunnel Encap attributes. </span><o:p></o:p></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p c=
lass=3DMsoNormal><span style=3D'color:#1F497D'>Is it possible to have following =
capability? </span><o:p></o:p></p><ul style=3D'margin-top:0in' type=3Ddisc><li c=
lass=3DMsoNormal style=3D'mso-list:l0 level1 lfo2'><span style=3D'color:#1F497D'>H=
ave a bit indicating a specific UPDATE is from authoritative source, therefo=
re overwrite all other Tunnel Attributes for the Prefix X to avoid recursive=
 next hop issues and tunnel selection at the receiving Router? </span><o:p><=
/o:p></li><li class=3DMsoNormal style=3D'mso-list:l0 level1 lfo2'><span style=3D'c=
olor:#1F497D'>Have a bit indicating that a specific UPDATE only contain Tunn=
el attributes for the receiving Router, therefore can=E2=80=99t be forwarded? </sp=
an><o:p></o:p></li></ul><p class=3DMsoListParagraph><span style=3D'color:#1F497D=
'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'=
>You said that SAFI 7 is deprecated because no one seemed interested in usin=
g it. We are very interested in using it because </span><o:p></o:p></p><ul s=
tyle=3D'margin-top:0in' type=3Ddisc><li class=3DMsoNormal style=3D'mso-list:l0 level=
1 lfo2'><span style=3D'color:#1F497D'>it can be easily distinguished from norm=
al &nbsp;BGP UPDATE</span><o:p></o:p></li><li class=3DMsoNormal style=3D'mso-lis=
t:l0 level1 lfo2'><span style=3D'color:#1F497D'>&nbsp;The receiving router doe=
sn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes before forwarding to other=
s. &nbsp;</span><o:p></o:p></li><li class=3DMsoNormal style=3D'mso-list:l0 level=
1 lfo2'><span style=3D'color:#1F497D'>Can even be used for passing reconfigure=
d IPsec keys to two ends of a tunnel. </span><o:p></o:p></li></ul><p class=3DM=
soNormal><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMs=
oNormal><span style=3D'color:#1F497D'>Therefore we think SAFI 7 should be rese=
rved. </span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>&=
nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#1F497D'>Th=
anks, Linda Dunbar</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'colo=
r:#1F497D'>&nbsp;</span><o:p></o:p></p><div><div style=3D'border:none;border-t=
op:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><spa=
n style=3D'color:windowtext'>From:</span></b><span style=3D'color:windowtext'> E=
ric C Rosen [<a href=3D"mailto:erosen@juniper.net">mailto:erosen@juniper.net</=
a>] <br><b>Sent:</b> Tuesday, July 03, 2018 12:21 PM<br><b>To:</b> Linda Dun=
bar &lt;<a href=3D"mailto:linda.dunbar@huawei.com">linda.dunbar@huawei.com</a>=
&gt;; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>; <a href=3D"mailto:draft-=
ietf-idr-tunnel-encaps@ietf.org">draft-ietf-idr-tunnel-encaps@ietf.org</a><b=
r><b>Subject:</b> Re: What are side effect for having Encap SAFI? can draft-=
ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before VPN is est=
ablished?</span><o:p></o:p></p></div></div><p class=3DMsoNormal>&nbsp;<o:p></o=
:p></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>On 7/2/2018 6:31 PM, =
Linda Dunbar wrote:<br><br><br><o:p></o:p></p><blockquote style=3D'margin-top:=
5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal><span style=3D'color:#1F497D'>Er=
ic, IDR group, </span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'color:#=
1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'text-autospace=
:none'><span style=3D'color:#1F497D'>It is indicated that RFC5512 is to be rep=
laced by draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-09 s=
tated that it </span><span style=3D'font-size:10.0pt;font-family:Courier;color=
:windowtext'>deprecates the</span><o:p></o:p></p><p class=3DMsoNormal><span st=
yle=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>Encapsulation SA=
FI. </span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:10.0pt;f=
ont-family:Courier;color:windowtext'>&nbsp;</span><o:p></o:p></p><p class=3DMs=
oNormal><span style=3D'color:#1F497D'>We find the Encapsulation SAFI is quite =
useful for CPE based EVPN. &nbsp;For example, a Controller (say RR) can send=
 an update with Encapsulation SAFI to two end points to trigger a tunnel est=
ablishment between them. </span><o:p></o:p></p><p class=3DMsoNormal><span styl=
e=3D'color:#1F497D'>What are side effect for having Encap SAFI? Can we preserv=
e it in draft-ietf-idr-tunnel-encaps?</span><o:p></o:p></p><p class=3DMsoNorma=
l><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal=
><span style=3D'color:#1F497D'>Thanks, Linda Dunbar</span><o:p></o:p></p><p cl=
ass=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p></bloc=
kquote><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Times N=
ew Roman",serif'><br>SAFI 7 was deprecated because no one seemed interested =
in using it, it creates additional operational issues, there is no real need=
 for it, and it was discouraging folks from actually using the Tunnel Encaps=
ulation attribute.&nbsp; This is discussed briefly in section 1.2 of the dra=
ft.<br><br>You can get a similar effect by using the technique described in =
section 7 of the draft.<br><br>If PE1 is the egress point of a tunnel, have =
PE1 originate an UPDATE whose NLRI is PE1's loopback address.&nbsp; Put the =
Tunnel Encapsulation attribute (with PE1 as remote endpoint) on this UPDATE.=
&nbsp; (The next hop field of this UPDATE doesn't really matter, as long as =
it is resolvable.)&nbsp; When PE1 originates VPN routes, it sets the next ho=
p to be its loopback address.&nbsp; Per section 7, this will result in packe=
ts being sent to PE1 though the specified tunnel.<br><br>&nbsp;</span><o:p><=
/o:p></p><p class=3DMsoNormal><span style=3D'color:windowtext'>_________________=
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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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To: Linda Dunbar <linda.dunbar@huawei.com>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Hi Linda,

I think Jeff is asking why not to use well known community to scope the
blast radius of the advertisement.

But personally I think this is pretty weak protection - if this would be
the only protection against IPSec credential's hijack. IMO this needs to be
protected a bit stronger such that even leak of the update will cause no
harm or VPN compromise.

Thx,
R.



On Mon, Jul 9, 2018 at 10:50 PM, Linda Dunbar <linda.dunbar@huawei.com>
wrote:

> Jeff,
>
>
>
> The answer to your question =E2=80=9CWhy would you want to build what you=
 are
> trying to do into protocol?=E2=80=9D is
>
> -        We want to use BGP to do more (i.e. use RR to distribute
> information injected from and by a controller). to eliminate dealing with
> the changes to NHRP/DSVPN.
>
>
>
> Can you elaborate the =E2=80=9Cthe existing technology=E2=80=9D?
>
>
>
> Linda
>
>
>
> *From:* Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
> *Sent:* Monday, July 09, 2018 3:35 PM
>
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Linda,
>
>
>
> You meant to say =E2=80=93 you=E2=80=99d use RR to distribute information=
 injected from
> and by a controller?
>
> Reflector (as the name suggests) reflects the routes, it doesn=E2=80=99t
> originates them as part of the reflector functionality  (it for sure coul=
d
> as a BGP speaker if such functionality is collocated with RR)
>
>
>
> Please read my initial questions, it looks like what you are trying to
> achieve could be done with the existing technology.
>
> Thanks!
>
>
>
> Cheers,
>
> Jeff
>
>
>
> *From: *Linda Dunbar <linda.dunbar@huawei.com>
> *Date: *Monday, July 9, 2018 at 13:28
> *To: *Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <
> erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "
> draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@
> ietf.org>
> *Subject: *RE: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Jeff,
>
>
>
> We would like to use RR as controller to distribute more detailed tunnel
> information, such as IPsec configuration & keys because in managed large
> scale Overlay deployment (SD-WAN), it doesn=E2=80=99t scale to allow all =
CPEs to
> negotiate IPsec keys.
>
>
>
> Linda
>
>
>
> *From:* Jeff Tantsura [mailto:jefftant.ietf@gmail.com
> <jefftant.ietf@gmail.com>]
> *Sent:* Monday, July 09, 2018 3:25 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Hi Linda,
>
>
>
> Why would you want to build what you are trying to do into protocol?
>
> #1 local policy
>
> #2  NO_ADVERTISE does that exactly
>
>
>
> Cheers,
>
> Jeff
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <
> linda.dunbar@huawei.com>
> *Date: *Monday, July 9, 2018 at 13:14
> *To: *Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "
> draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@
> ietf.org>
> *Subject: *[Idr] Possible to set up priority for Tunnels established by
> draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Eric,
>
>
>
> draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of
> multiple UPDATE messages with Tunnel Encap attributes.
>
>
>
> Is it possible to have following capability?
>
> -        Have a bit indicating a specific UPDATE is from authoritative
> source, therefore overwrite all other Tunnel Attributes for the Prefix X =
to
> avoid recursive next hop issues and tunnel selection at the receiving
> Router?
>
> -        Have a bit indicating that a specific UPDATE only contain Tunnel
> attributes for the receiving Router, therefore can=E2=80=99t be forwarded=
?
>
>
>
> You said that SAFI 7 is deprecated because no one seemed interested in
> using it. We are very interested in using it because
>
> -        it can be easily distinguished from normal  BGP UPDATE
>
> -         The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=
=80=9D the tunnel
> attributes before forwarding to others.
>
> -        Can even be used for passing reconfigured IPsec keys to two ends
> of a tunnel.
>
>
>
> Therefore we think SAFI 7 should be reserved.
>
>
>
> Thanks, Linda Dunbar
>
>
>
> *From:* Eric C Rosen [mailto:erosen@juniper.net <erosen@juniper.net>]
> *Sent:* Tuesday, July 03, 2018 12:21 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org;
> draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: What are side effect for having Encap SAFI? can
> draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before
> VPN is established?
>
>
>
> On 7/2/2018 6:31 PM, Linda Dunbar wrote:
>
> Eric, IDR group,
>
>
>
> It is indicated that RFC5512 is to be replaced by
> draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-09 stated
> that it deprecates the
>
> Encapsulation SAFI.
>
>
>
> We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For
> example, a Controller (say RR) can send an update with Encapsulation SAFI
> to two end points to trigger a tunnel establishment between them.
>
> What are side effect for having Encap SAFI? Can we preserve it in
> draft-ietf-idr-tunnel-encaps?
>
>
>
> Thanks, Linda Dunbar
>
>
>
>
> SAFI 7 was deprecated because no one seemed interested in using it, it
> creates additional operational issues, there is no real need for it, and =
it
> was discouraging folks from actually using the Tunnel Encapsulation
> attribute.  This is discussed briefly in section 1.2 of the draft.
>
> You can get a similar effect by using the technique described in section =
7
> of the draft.
>
> If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whos=
e
> NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute
> (with PE1 as remote endpoint) on this UPDATE.  (The next hop field of thi=
s
> UPDATE doesn't really matter, as long as it is resolvable.)  When PE1
> originates VPN routes, it sets the next hop to be its loopback address.
> Per section 7, this will result in packets being sent to PE1 though the
> specified tunnel.
>
>
>
> _______________________________________________ Idr mailing list
> Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--000000000000e588db0570973477
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Linda,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">I think Jeff is asking why not to use well known co=
mmunity to scope the blast radius of the advertisement.=C2=A0</div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small">But personally I think this is pret=
ty weak protection - if this would be the only protection against IPSec cre=
dential&#39;s hijack. IMO this needs to be protected a bit stronger such th=
at even leak of the update will cause no harm or VPN compromise.</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small">Thx,<br>R.</div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvet=
ica,sans-serif;font-size:small"><br></div></div><div class=3D"gmail_extra">=
<br><div class=3D"gmail_quote">On Mon, Jul 9, 2018 at 10:50 PM, Linda Dunba=
r <span dir=3D"ltr">&lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=
=3D"_blank">linda.dunbar@huawei.com</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex">





<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_5848266144591628402WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Jeff, <u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">The answer to your que=
stion =E2=80=9C</span><span style=3D"color:windowtext">Why would you want t=
o build what you are trying to do into protocol?=E2=80=9D
</span><span style=3D"color:#1f497d">is <u></u><u></u></span></p>
<p class=3D"m_5848266144591628402MsoListParagraph"><u></u><span style=3D"co=
lor:windowtext"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot=
;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"color:#1f497d">We want to use BG=
P to do more (i.e.
</span><span style=3D"color:windowtext">use RR to distribute information in=
jected from and by a controller).
</span><span style=3D"color:#1f497d">to eliminate dealing with the changes =
to NHRP/DSVPN.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Can you elaborate the =
=E2=80=9C</span><span style=3D"color:windowtext">the existing technology=E2=
=80=9D?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Linda<u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><a name=3D"m_5848266144591628402__MailEndCompose"><s=
pan style=3D"color:#1f497d"><u></u>=C2=A0<u></u></span></a></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"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Jeff Tantsura [mailto:<a href=3D"mailto:j=
efftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gmail.<wbr>com</a>]
<br>
<b>Sent:</b> Monday, July 09, 2018 3:35 PM</span></p><div><div class=3D"h5"=
><br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;; Eric C Rosen &lt;<a href=3D"=
mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;; <a=
 href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-i=
etf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></div></div><p></=
p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Linda,<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">You meant to say =
=E2=80=93 you=E2=80=99d use RR to distribute information injected from and =
by a controller?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Reflector (as the n=
ame suggests) reflects the routes, it doesn=E2=80=99t originates them as pa=
rt of the reflector functionality =C2=A0(it for sure could as a BGP speaker=
 if such functionality is collocated with RR)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Please read my init=
ial questions, it looks like what you are trying to achieve could be done w=
ith the existing technology.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Thanks!<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jeff<span style=3D"color:windowtext"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<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:12.0pt">From: </span></b=
><span style=3D"font-size:12.0pt">Linda Dunbar &lt;<a href=3D"mailto:linda.=
dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br>
<b>Date: </b>Monday, July 9, 2018 at 13:28<br>
<b>To: </b>Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" tar=
get=3D"_blank">jefftant.ietf@gmail.com</a>&gt;, Eric C Rosen &lt;<a href=3D=
"mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;, &=
quot;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&quo=
t; &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&g=
t;,
 &quot;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_=
blank">draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a>&quot; &lt;<a href=3D"=
mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-=
idr-tunnel-encaps@<wbr>ietf.org</a>&gt;<br>
<b>Subject: </b>RE: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Jeff, </span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">We would like to use R=
R as controller to distribute more detailed tunnel information, such as IPs=
ec configuration &amp; keys because in managed large scale Overlay deployme=
nt (SD-WAN), it doesn=E2=80=99t scale to allow all
 CPEs to negotiate IPsec keys. </span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Linda</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></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"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Jeff Tantsura [<a href=3D"mailto:jefftant=
.ietf@gmail.com" target=3D"_blank">mailto:jefftant.ietf@gmail.<wbr>com</a>]
<br>
<b>Sent:</b> Monday, July 09, 2018 3:25 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;; Eric C Rosen &lt;<a href=3D"=
mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Hi Linda,</span><u>=
</u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Why would you want =
to build what you are trying to do into protocol?</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">#1 local policy</sp=
an><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">#2 =C2=A0NO_ADVERTI=
SE does that exactly
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0</span><u></u=
><u></u></p>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jeff<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0</span><u></u=
><u></u></p>
<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:12.0pt">From: </span></b=
><span style=3D"font-size:12.0pt">Idr &lt;<a href=3D"mailto:idr-bounces@iet=
f.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf of Linda Du=
nbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blank">linda=
.dunbar@huawei.com</a>&gt;<br>
<b>Date: </b>Monday, July 9, 2018 at 13:14<br>
<b>To: </b>Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net" target=3D=
"_blank">erosen@juniper.net</a>&gt;, &quot;<a href=3D"mailto:idr@ietf.org" =
target=3D"_blank">idr@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr@ietf.org=
" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-iet=
f-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-encap=
s@<wbr>ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_bl=
ank">draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a>&gt;<br>
<b>Subject: </b>[Idr] Possible to set up priority for Tunnels established b=
y draft-ietf-idr-tunnel-encaps-<wbr>09 ?</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0</span><u></u=
><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, </span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">draft-ietf-idr-tunnel-=
encaps-<wbr>09 discussed ways to resolve conflicts of multiple UPDATE messa=
ges with Tunnel Encap attributes.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Is it possible to have=
 following capability?
</span><u></u><u></u></p>
</div></div><p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">Have a bit indicating a =
specific UPDATE is from authoritative source, therefore overwrite all other=
 Tunnel Attributes for the Prefix X to avoid recursive next hop issues and =
tunnel selection at the receiving
 Router? </span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">Have a bit indicating th=
at a specific UPDATE only contain Tunnel attributes for the receiving Route=
r, therefore can=E2=80=99t be forwarded?
</span><u></u><u></u></p><span class=3D"">
<p class=3D"m_5848266144591628402MsoListParagraph"><span style=3D"color:#1f=
497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">You said that SAFI 7 i=
s deprecated because no one seemed interested in using it. We are very inte=
rested in using it because
</span><u></u><u></u></p>
</span><p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">it can be easily disting=
uished from normal =C2=A0BGP UPDATE</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">=C2=A0The receiving rout=
er doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes b=
efore forwarding to others. =C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">Can even be used for pas=
sing reconfigured IPsec keys to two ends of a tunnel.
</span><u></u><u></u></p><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Therefore we think SAF=
I 7 should be reserved.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></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"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Eric C Rosen [<a href=3D"mailto:erosen@ju=
niper.net" target=3D"_blank">mailto:erosen@juniper.net</a>]
<br>
<b>Sent:</b> Tuesday, July 03, 2018 12:21 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: What are side effect for having Encap SAFI? can draft-i=
etf-idr-tunnel-encaps-<wbr>09 preserve trigger tunnel creation before VPN i=
s established?</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On 7/2/2018 6:31 PM, =
Linda Dunbar wrote:<br>
<br>
<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, IDR group, </spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"color:#=
1f497d">It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tu=
nnel-encaps. But draft-ietf-idr-tunnel-encaps-<wbr>09 stated that it
</span><span style=3D"font-size:10.0pt;font-family:Courier;color:windowtext=
">deprecates the</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">Encapsulation SAFI.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">We find the Encapsulat=
ion SAFI is quite useful for CPE based EVPN.=C2=A0 For example, a Controlle=
r (say RR) can send an update with Encapsulation SAFI to two end points to =
trigger a tunnel establishment between them.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">What are side effect f=
or having Encap SAFI? Can we preserve it in draft-ietf-idr-tunnel-encaps?</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><br>
SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was=
 discouraging folks from actually using the Tunnel Encapsulation attribute.=
=C2=A0 This is discussed briefly in section
 1.2 of the draft.<br>
<br>
You can get a similar effect by using the technique described in section 7 =
of the draft.<br>
<br>
If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1&#39;s loopback address.=C2=A0 Put the Tunnel Encapsulation attr=
ibute (with PE1 as remote endpoint) on this UPDATE.=C2=A0 (The next hop fie=
ld of this UPDATE doesn&#39;t really matter, as long
 as it is resolvable.)=C2=A0 When PE1 originates VPN routes, it sets the ne=
xt hop to be its loopback address.=C2=A0 Per section 7, this will result in=
 packets being sent to PE1 though the specified tunnel.<br>
<br>
=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">___________________=
___________<wbr>_________________ Idr mailing list
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a> <a href=
=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">
https://www.ietf.org/mailman/<wbr>listinfo/idr</a> </span><u></u><u></u></p=
>
</span></div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--000000000000e588db0570973477--


From nobody Mon Jul  9 14:03:51 2018
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Date: Mon, 09 Jul 2018 14:03:42 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Robert Raszuk <robert@raszuk.net>, Linda Dunbar <linda.dunbar@huawei.com>
CC: Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Message-ID: <E2217125-5BAB-4C85-9FF4-4A89B454214C@gmail.com>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
References: <78D707C9-6DC2-459F-81E4-A53B46F1F019@gmail.com> <4A95BA014132FF49AE685FAB4B9F17F66B0A8BCC@sjceml521-mbs.china.huawei.com> <DF0D0CFA-AFCA-44FF-ADD8-BE6EDC51AFEA@gmail.com> <4A95BA014132FF49AE685FAB4B9F17F66B0A8BEF@sjceml521-mbs.china.huawei.com> <CA+b+ERmENsva=5ZT_4x8+NaokXCpBEN+LTU0xwhN_W4cvmOsqQ@mail.gmail.com>
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Yes Robert, exactly and such I would question the use of BGP (KitchenSinkPr=
otocol) to do so in general

=20

Cheers,

Jeff

=20

From: <rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net>
Date: Monday, July 9, 2018 at 13:53
To: Linda Dunbar <linda.dunbar@huawei.com>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.n=
et>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" =
<draft-ietf-idr-tunnel-encaps@ietf.org>
Subject: Re: [Idr] Possible to set up priority for Tunnels established by d=
raft-ietf-idr-tunnel-encaps-09 ?

=20

Hi Linda,

=20

I think Jeff is asking why not to use well known community to scope the bla=
st radius of the advertisement.=20

=20

But personally I think this is pretty weak protection - if this would be th=
e only protection against IPSec credential's hijack. IMO this needs to be pr=
otected a bit stronger such that even leak of the update will cause no harm =
or VPN compromise.

=20

Thx,
R.

=20

=20

=20

On Mon, Jul 9, 2018 at 10:50 PM, Linda Dunbar <linda.dunbar@huawei.com> wro=
te:

Jeff,=20

=20

The answer to your question =E2=80=9CWhy would you want to build what you are try=
ing to do into protocol?=E2=80=9D is=20

-        We want to use BGP to do more (i.e. use RR to distribute informati=
on injected from and by a controller). to eliminate dealing with the changes=
 to NHRP/DSVPN.=20

=20

Can you elaborate the =E2=80=9Cthe existing technology=E2=80=9D?

=20

Linda

=20

From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]=20
Sent: Monday, July 09, 2018 3:35 PM


To: Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <erosen@juniper.ne=
t>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
Subject: Re: [Idr] Possible to set up priority for Tunnels established by d=
raft-ietf-idr-tunnel-encaps-09 ?

=20

Linda,

=20

You meant to say =E2=80=93 you=E2=80=99d use RR to distribute information injected from=
 and by a controller?

Reflector (as the name suggests) reflects the routes, it doesn=E2=80=99t originat=
es them as part of the reflector functionality  (it for sure could as a BGP =
speaker if such functionality is collocated with RR)

=20

Please read my initial questions, it looks like what you are trying to achi=
eve could be done with the existing technology.

Thanks!

=20

Cheers,

Jeff

=20

From: Linda Dunbar <linda.dunbar@huawei.com>
Date: Monday, July 9, 2018 at 13:28
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.n=
et>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" =
<draft-ietf-idr-tunnel-encaps@ietf.org>
Subject: RE: [Idr] Possible to set up priority for Tunnels established by d=
raft-ietf-idr-tunnel-encaps-09 ?

=20

Jeff,=20

=20

We would like to use RR as controller to distribute more detailed tunnel in=
formation, such as IPsec configuration & keys because in managed large scale=
 Overlay deployment (SD-WAN), it doesn=E2=80=99t scale to allow all CPEs to negoti=
ate IPsec keys.=20

=20

Linda

=20

From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]=20
Sent: Monday, July 09, 2018 3:25 PM
To: Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <erosen@juniper.ne=
t>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
Subject: Re: [Idr] Possible to set up priority for Tunnels established by d=
raft-ietf-idr-tunnel-encaps-09 ?

=20

Hi Linda,

=20

Why would you want to build what you are trying to do into protocol?

#1 local policy

#2  NO_ADVERTISE does that exactly=20

=20

Cheers,

Jeff

=20

From: Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <linda.dunbar@hu=
awei.com>
Date: Monday, July 9, 2018 at 13:14
To: Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draf=
t-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Subject: [Idr] Possible to set up priority for Tunnels established by draft=
-ietf-idr-tunnel-encaps-09 ?

=20

Eric,=20

=20

draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of mult=
iple UPDATE messages with Tunnel Encap attributes.=20

=20

Is it possible to have following capability?=20

-        Have a bit indicating a specific UPDATE is from authoritative sour=
ce, therefore overwrite all other Tunnel Attributes for the Prefix X to avoi=
d recursive next hop issues and tunnel selection at the receiving Router?=20

-        Have a bit indicating that a specific UPDATE only contain Tunnel a=
ttributes for the receiving Router, therefore can=E2=80=99t be forwarded?=20

=20

You said that SAFI 7 is deprecated because no one seemed interested in usin=
g it. We are very interested in using it because=20

-        it can be easily distinguished from normal  BGP UPDATE

-         The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel at=
tributes before forwarding to others. =20

-        Can even be used for passing reconfigured IPsec keys to two ends o=
f a tunnel.=20

=20

Therefore we think SAFI 7 should be reserved.=20

=20

Thanks, Linda Dunbar

=20

From: Eric C Rosen [mailto:erosen@juniper.net]=20
Sent: Tuesday, July 03, 2018 12:21 PM
To: Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org; draft-ietf-idr-tu=
nnel-encaps@ietf.org
Subject: Re: What are side effect for having Encap SAFI? can draft-ietf-idr=
-tunnel-encaps-09 preserve trigger tunnel creation before VPN is established=
?

=20

On 7/2/2018 6:31 PM, Linda Dunbar wrote:

Eric, IDR group,=20

=20

It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tunnel-enc=
aps. But draft-ietf-idr-tunnel-encaps-09 stated that it deprecates the

Encapsulation SAFI.=20

=20

We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For exa=
mple, a Controller (say RR) can send an update with Encapsulation SAFI to tw=
o end points to trigger a tunnel establishment between them.=20

What are side effect for having Encap SAFI? Can we preserve it in draft-iet=
f-idr-tunnel-encaps?

=20

Thanks, Linda Dunbar

=20


SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was =
discouraging folks from actually using the Tunnel Encapsulation attribute.  =
This is discussed briefly in section 1.2 of the draft.

You can get a similar effect by using the technique described in section 7 =
of the draft.

If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute (wit=
h PE1 as remote endpoint) on this UPDATE.  (The next hop field of this UPDAT=
E doesn't really matter, as long as it is resolvable.)  When PE1 originates =
VPN routes, it sets the next hop to be its loopback address.  Per section 7,=
 this will result in packets being sent to PE1 though the specified tunnel.

=20

_______________________________________________ Idr mailing list Idr@ietf.o=
rg https://www.ietf.org/mailman/listinfo/idr=20


_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr

=20


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--></style></head><body lang=3DEN-US link=3Dblue vlink=3Dpurple><div class=3DWordSe=
ction1><p class=3DMsoNormal>Yes Robert, exactly and such I would question the =
use of BGP (KitchenSinkProtocol) to do so in general<o:p></o:p></p><p class=3D=
MsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal><span style=3D'color:bl=
ack'>Cheers,<o:p></o:p></span></p></div><p class=3DMsoNormal><span style=3D'colo=
r:black'>Jeff</span><o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><=
div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in =
0in'><p class=3DMsoNormal><b><span style=3D'font-size:12.0pt;color:black'>From: =
</span></b><span style=3D'font-size:12.0pt;color:black'>&lt;rraszuk@gmail.com&=
gt; on behalf of Robert Raszuk &lt;robert@raszuk.net&gt;<br><b>Date: </b>Mon=
day, July 9, 2018 at 13:53<br><b>To: </b>Linda Dunbar &lt;linda.dunbar@huawe=
i.com&gt;<br><b>Cc: </b>Jeff Tantsura &lt;jefftant.ietf@gmail.com&gt;, Eric =
C Rosen &lt;erosen@juniper.net&gt;, &quot;idr@ietf.org&quot; &lt;idr@ietf.or=
g&gt;, &quot;draft-ietf-idr-tunnel-encaps@ietf.org&quot; &lt;draft-ietf-idr-=
tunnel-encaps@ietf.org&gt;<br><b>Subject: </b>Re: [Idr] Possible to set up p=
riority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div>=
<div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Arial",sa=
ns-serif'>Hi Linda,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span=
 style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></=
span></p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-fa=
mily:"Arial",sans-serif'>I think Jeff is asking why not to use well known co=
mmunity to scope the blast radius of the advertisement.&nbsp;<o:p></o:p></sp=
an></p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-fami=
ly:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNo=
rmal><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>But perso=
nally I think this is pretty weak protection - if this would be the only pro=
tection against IPSec credential's hijack. IMO this needs to be protected a =
bit stronger such that even leak of the update will cause no harm or VPN com=
promise.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span style=3D'fon=
t-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></=
div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Arial=
",sans-serif'>Thx,<br>R.<o:p></o:p></span></p></div><div><p class=3DMsoNormal>=
<span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o=
:p></span></p></div><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;fo=
nt-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div></div><div><=
p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Mon, Jul 9=
, 2018 at 10:50 PM, Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com=
" target=3D"_blank">linda.dunbar@huawei.com</a>&gt; wrote:<o:p></o:p></p><bloc=
kquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0i=
n 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal sty=
le=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#=
1F497D'>Jeff, </span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top=
-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</sp=
an><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:auto'><span style=3D'color:#1F497D'>The answer to your question =
=E2=80=9C</span>Why would you want to build what you are trying to do into protoco=
l?=E2=80=9D <span style=3D'color:#1F497D'>is </span><o:p></o:p></p><p class=3Dm5848266=
144591628402msolistparagraph>-<span style=3D'font-size:7.0pt;font-family:"Time=
s New Roman",serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:#1F497D'>We want to use BGP to do more (i.e. </span>use RR to d=
istribute information injected from and by a controller). <span style=3D'color=
:#1F497D'>to eliminate dealing with the changes to NHRP/DSVPN. </span><o:p><=
/o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3D=
MsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span s=
tyle=3D'color:#1F497D'>Can you elaborate the =E2=80=9C</span>the existing technology=
=E2=80=9D?<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-mar=
gin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:aut=
o'><span style=3D'color:#1F497D'>Linda</span><o:p></o:p></p><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><a name=3D"m_58482=
66144591628402__MailEndCompose"><span style=3D'color:#1F497D'>&nbsp;</span></a=
><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 1.0pt;=
padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto=
;mso-margin-bottom-alt:auto'><b>From:</b> Jeff Tantsura [mailto:<a href=3D"mai=
lto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gmail.com</a>] <b=
r><b>Sent:</b> Monday, July 09, 2018 3:35 PM<o:p></o:p></p><div><div><p clas=
s=3DMsoNormal><br><b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@hua=
wei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;; Eric C Rosen &lt;<=
a href=3D"mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt=
;; <a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=3D"=
mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr=
-tunnel-encaps@ietf.org</a><br><b>Subject:</b> Re: [Idr] Possible to set up =
priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?<o:p></=
o:p></p></div></div></div></div><div><div><p class=3DMsoNormal style=3D'mso-marg=
in-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:p></p><p class=3DMs=
oNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Linda,<o:=
p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bot=
tom-alt:auto'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-=
alt:auto;mso-margin-bottom-alt:auto'>You meant to say =E2=80=93 you=E2=80=99d use RR to =
distribute information injected from and by a controller?<o:p></o:p></p><p c=
lass=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Re=
flector (as the name suggests) reflects the routes, it doesn=E2=80=99t originates =
them as part of the reflector functionality &nbsp;(it for sure could as a BG=
P speaker if such functionality is collocated with RR)<o:p></o:p></p><p clas=
s=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp=
;<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto'>Please read my initial questions, it looks like what you a=
re trying to achieve could be done with the existing technology.<o:p></o:p><=
/p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:a=
uto'>Thanks!<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto=
;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:p></p><div><p class=3DMsoNormal st=
yle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Cheers,<o:p></o:p><=
/p></div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto'>Jeff<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:p></p><div style=3D'border:none=
;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style=3D=
'font-size:12.0pt'>From: </span></b><span style=3D'font-size:12.0pt'>Linda Dun=
bar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blank">linda.dunba=
r@huawei.com</a>&gt;<br><b>Date: </b>Monday, July 9, 2018 at 13:28<br><b>To:=
 </b>Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_bla=
nk">jefftant.ietf@gmail.com</a>&gt;, Eric C Rosen &lt;<a href=3D"mailto:erosen=
@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;, &quot;<a href=3D"mai=
lto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&quot; &lt;<a href=3D"mailto=
:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:d=
raft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-=
encaps@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@i=
etf.org" target=3D"_blank">draft-ietf-idr-tunnel-encaps@ietf.org</a>&gt;<br><b=
>Subject: </b>RE: [Idr] Possible to set up priority for Tunnels established =
by draft-ietf-idr-tunnel-encaps-09 ?</span><o:p></o:p></p></div><div><p clas=
s=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp=
;<o:p></o:p></p></div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-=
margin-bottom-alt:auto'><span style=3D'color:#1F497D'>Jeff, </span><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:=
auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNo=
rmal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D=
'color:#1F497D'>We would like to use RR as controller to distribute more det=
ailed tunnel information, such as IPsec configuration &amp; keys because in =
managed large scale Overlay deployment (SD-WAN), it doesn=E2=80=99t scale to allow=
 all CPEs to negotiate IPsec keys. </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'colo=
r:#1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>Linda</=
span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></=
p><div><div style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt =
0in 0in 0in'><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bo=
ttom-alt:auto'><b>From:</b> Jeff Tantsura [<a href=3D"mailto:jefftant.ietf@gma=
il.com" target=3D"_blank">mailto:jefftant.ietf@gmail.com</a>] <br><b>Sent:</b>=
 Monday, July 09, 2018 3:25 PM<br><b>To:</b> Linda Dunbar &lt;<a href=3D"mailt=
o:linda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;; =
Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net" target=3D"_blank">erosen@=
juniper.net</a>&gt;; <a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.=
org</a>; <a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_bla=
nk">draft-ietf-idr-tunnel-encaps@ietf.org</a><br><b>Subject:</b> Re: [Idr] P=
ossible to set up priority for Tunnels established by draft-ietf-idr-tunnel-=
encaps-09 ?<o:p></o:p></p></div></div><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:p></p><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi Linda,<o:p=
></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bott=
om-alt:auto'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-a=
lt:auto;mso-margin-bottom-alt:auto'>Why would you want to build what you are=
 trying to do into protocol?<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto'>#1 local policy<o:p></o:p></p><=
p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'=
>#2 &nbsp;NO_ADVERTISE does that exactly <o:p></o:p></p><p class=3DMsoNormal s=
tyle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:p><=
/p><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto'>Cheers,<o:p></o:p></p></div><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto'>Jeff<o:p></o:p></p><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:=
p></p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0=
in 0in 0in'><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bot=
tom-alt:auto'><b><span style=3D'font-size:12.0pt'>From: </span></b><span style=
=3D'font-size:12.0pt'>Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_b=
lank">idr-bounces@ietf.org</a>&gt; on behalf of Linda Dunbar &lt;<a href=3D"ma=
ilto:linda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt=
;<br><b>Date: </b>Monday, July 9, 2018 at 13:14<br><b>To: </b>Eric C Rosen &=
lt;<a href=3D"mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a=
>&gt;, &quot;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&=
quot; &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;=
, &quot;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blan=
k">draft-ietf-idr-tunnel-encaps@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft=
-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-enca=
ps@ietf.org</a>&gt;<br><b>Subject: </b>[Idr] Possible to set up priority for=
 Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?</span><o:p></o:p><=
/p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-b=
ottom-alt:auto'>&nbsp;<o:p></o:p></p></div><p class=3DMsoNormal style=3D'mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>Eri=
c, </span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;m=
so-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o=
:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto'><span style=3D'color:#1F497D'>draft-ietf-idr-tunnel-encaps-09 discuss=
ed ways to resolve conflicts of multiple UPDATE messages with Tunnel Encap a=
ttributes. </span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-al=
t:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span>=
<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-=
bottom-alt:auto'><span style=3D'color:#1F497D'>Is it possible to have followin=
g capability? </span><o:p></o:p></p></div></div><p class=3DMsoNormal style=3D'ms=
o-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in'>-<span st=
yle=3D'font-size:7.0pt;font-family:"Times New Roman",serif'>&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D'color:#1F497D'>Have a bit indic=
ating a specific UPDATE is from authoritative source, therefore overwrite al=
l other Tunnel Attributes for the Prefix X to avoid recursive next hop issue=
s and tunnel selection at the receiving Router? </span><o:p></o:p></p><p cla=
ss=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margi=
n-left:.5in'>-<span style=3D'font-size:7.0pt;font-family:"Times New Roman",ser=
if'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D'color:#1F=
497D'>Have a bit indicating that a specific UPDATE only contain Tunnel attri=
butes for the receiving Router, therefore can=E2=80=99t be forwarded? </span><o:p>=
</o:p></p><p class=3Dm5848266144591628402msolistparagraph><span style=3D'color:#=
1F497D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top=
-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>You said t=
hat SAFI 7 is deprecated because no one seemed interested in using it. We ar=
e very interested in using it because </span><o:p></o:p></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5i=
n'>-<span style=3D'font-size:7.0pt;font-family:"Times New Roman",serif'>&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D'color:#1F497D'>it c=
an be easily distinguished from normal &nbsp;BGP UPDATE</span><o:p></o:p></p=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:aut=
o;margin-left:.5in'>-<span style=3D'font-size:7.0pt;font-family:"Times New Rom=
an",serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D'co=
lor:#1F497D'>&nbsp;The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the t=
unnel attributes before forwarding to others. &nbsp;</span><o:p></o:p></p><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;m=
argin-left:.5in'>-<span style=3D'font-size:7.0pt;font-family:"Times New Roman"=
,serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D'color=
:#1F497D'>Can even be used for passing reconfigured IPsec keys to two ends o=
f a tunnel. </span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-a=
lt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto'><span style=3D'color:#1F497D'>Therefore we think SAFI 7 shou=
ld be reserved. </span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</=
span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto'><span style=3D'color:#1F497D'>Thanks, Linda Dunbar</span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p><d=
iv><div style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto'><b>From:</b> Eric C Rosen [<a href=3D"mailto:erosen@juniper.net" ta=
rget=3D"_blank">mailto:erosen@juniper.net</a>] <br><b>Sent:</b> Tuesday, July =
03, 2018 12:21 PM<br><b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunba=
r@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;; <a href=3D"mail=
to:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=3D"mailto:draft-iet=
f-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-encaps@i=
etf.org</a><br><b>Subject:</b> Re: What are side effect for having Encap SAF=
I? can draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation befo=
re VPN is established?<o:p></o:p></p></div></div><p class=3DMsoNormal style=3D'm=
so-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p></o:p></p><p c=
lass=3DMsoNormal style=3D'mso-margin-top-alt:auto;margin-bottom:12.0pt'>On 7/2/2=
018 6:31 PM, Linda Dunbar wrote:<o:p></o:p></p><blockquote style=3D'margin-top=
:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>Eric, IDR group, <=
/span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p><=
/p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:a=
uto;text-autospace:none'><span style=3D'color:#1F497D'>It is indicated that RF=
C5512 is to be replaced by draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-=
tunnel-encaps-09 stated that it </span><span style=3D'font-size:10.0pt;font-fa=
mily:Courier'>deprecates the</span><o:p></o:p></p><p class=3DMsoNormal style=3D'=
mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:1=
0.0pt;font-family:Courier'>Encapsulation SAFI. </span><o:p></o:p></p><p clas=
s=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span=
 style=3D'font-size:10.0pt;font-family:Courier'>&nbsp;</span><o:p></o:p></p><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>=
<span style=3D'color:#1F497D'>We find the Encapsulation SAFI is quite useful f=
or CPE based EVPN.&nbsp; For example, a Controller (say RR) can send an upda=
te with Encapsulation SAFI to two end points to trigger a tunnel establishme=
nt between them. </span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>What ar=
e side effect for having Encap SAFI? Can we preserve it in draft-ietf-idr-tu=
nnel-encaps?</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-a=
lt:auto;mso-margin-bottom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto'><span style=3D'color:#1F497D'>Thanks, Linda Dunbar</span><o:=
p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bot=
tom-alt:auto'><span style=3D'color:#1F497D'>&nbsp;</span><o:p></o:p></p></bloc=
kquote><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto'><span style=3D'font-size:12.0pt;font-family:"Times New Roman",serif'>=
<br>SAFI 7 was deprecated because no one seemed interested in using it, it c=
reates additional operational issues, there is no real need for it, and it w=
as discouraging folks from actually using the Tunnel Encapsulation attribute=
.&nbsp; This is discussed briefly in section 1.2 of the draft.<br><br>You ca=
n get a similar effect by using the technique described in section 7 of the =
draft.<br><br>If PE1 is the egress point of a tunnel, have PE1 originate an =
UPDATE whose NLRI is PE1's loopback address.&nbsp; Put the Tunnel Encapsulat=
ion attribute (with PE1 as remote endpoint) on this UPDATE.&nbsp; (The next =
hop field of this UPDATE doesn't really matter, as long as it is resolvable.=
)&nbsp; When PE1 originates VPN routes, it sets the next hop to be its loopb=
ack address.&nbsp; Per section 7, this will result in packets being sent to =
PE1 though the specified tunnel.<br><br>&nbsp;</span><o:p></o:p></p><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>______=
_________________________________________ Idr mailing list <a href=3D"mailto:I=
dr@ietf.org" target=3D"_blank">Idr@ietf.org</a> <a href=3D"https://www.ietf.org/=
mailman/listinfo/idr" target=3D"_blank">https://www.ietf.org/mailman/listinfo/=
idr</a> <o:p></o:p></p></div></div><p class=3DMsoNormal style=3D'margin-bottom:1=
2.0pt'><br>_______________________________________________<br>Idr mailing li=
st<br><a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br><a href=3D"https://www=
.ietf.org/mailman/listinfo/idr" target=3D"_blank">https://www.ietf.org/mailman=
/listinfo/idr</a><o:p></o:p></p></blockquote></div><p class=3DMsoNormal><o:p>&=
nbsp;</o:p></p></div></div></body></html>

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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Date: Mon, 9 Jul 2018 21:05:02 +0000
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 9 Jul 2018 23:09:00 +0200
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To: Jeff Tantsura <jefftant.ietf@gmail.com>
Cc: Linda Dunbar <linda.dunbar@huawei.com>, Eric C Rosen <erosen@juniper.net>,  "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/1i_Lp6NjTvq_QZ3uTGvuCp8AcJM>
Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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--0000000000003b97830570976ccc
Content-Type: text/plain; charset="UTF-8"
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Hey Jeff,

You know me saying lately that using BGP (aka KSP) is a bad idea if we use
it to distribute p2p information. However here the information is really
p2mp (provided common IPSec credentials are distributed to all CPEs) so it
actually may make sense.

Just started a side thread on this with a little idea how we could do that
safely :)

But if you have a suggestion to use some other protocol for it I am all
ears !

Cheers,
R


On Mon, Jul 9, 2018 at 11:03 PM, Jeff Tantsura <jefftant.ietf@gmail.com>
wrote:

> Yes Robert, exactly and such I would question the use of BGP
> (KitchenSinkProtocol) to do so in general
>
>
>
> Cheers,
>
> Jeff
>
>
>
> *From: *<rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net=
>
> *Date: *Monday, July 9, 2018 at 13:53
> *To: *Linda Dunbar <linda.dunbar@huawei.com>
> *Cc: *Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <
> erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "
> draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@
> ietf.org>
>
> *Subject: *Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Hi Linda,
>
>
>
> I think Jeff is asking why not to use well known community to scope the
> blast radius of the advertisement.
>
>
>
> But personally I think this is pretty weak protection - if this would be
> the only protection against IPSec credential's hijack. IMO this needs to =
be
> protected a bit stronger such that even leak of the update will cause no
> harm or VPN compromise.
>
>
>
> Thx,
> R.
>
>
>
>
>
>
>
> On Mon, Jul 9, 2018 at 10:50 PM, Linda Dunbar <linda.dunbar@huawei.com>
> wrote:
>
> Jeff,
>
>
>
> The answer to your question =E2=80=9CWhy would you want to build what you=
 are
> trying to do into protocol?=E2=80=9D is
>
> -        We want to use BGP to do more (i.e. use RR to distribute
> information injected from and by a controller). to eliminate dealing with
> the changes to NHRP/DSVPN.
>
>
>
> Can you elaborate the =E2=80=9Cthe existing technology=E2=80=9D?
>
>
>
> Linda
>
>

--0000000000003b97830570976ccc
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hey Jeff,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">You know me saying lately that using BGP (aka KSP) =
is a bad idea if we use it to distribute p2p information. However here the =
information is really p2mp (provided common IPSec credentials are distribut=
ed to all CPEs) so it actually may make sense.=C2=A0</div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small">Just started a side thread on this with a li=
ttle idea how we could do that safely :)=C2=A0</div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small">But if you have a suggestion to use some other pro=
tocol for it I am all ears !</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Cheers,</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">R</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small"><br></div><div class=3D"gmail_extra"><div class=3D"gma=
il_quote">On Mon, Jul 9, 2018 at 11:03 PM, Jeff Tantsura <span dir=3D"ltr">=
&lt;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.i=
etf@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div class=3D"m_-516621957733=
8699169WordSection1"><p class=3D"MsoNormal">Yes Robert, exactly and such I =
would question the use of BGP (KitchenSinkProtocol) to do so in general<u><=
/u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><p class=
=3D"MsoNormal"><span style=3D"color:black">Cheers,<u></u><u></u></span></p>=
</div><p class=3D"MsoNormal"><span style=3D"color:black">Jeff</span><u></u>=
<u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div style=3D"bor=
der:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class=
=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:black">From: </span=
></b><span style=3D"font-size:12.0pt;color:black">&lt;<a href=3D"mailto:rra=
szuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a>&gt; on behalf of Ro=
bert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robe=
rt@raszuk.net</a>&gt;<br><b>Date: </b>Monday, July 9, 2018 at 13:53<br><b>T=
o: </b>Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=
=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br><b>Cc: </b>Jeff Tantsura &lt=
;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf=
@gmail.com</a>&gt;, Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net" =
target=3D"_blank">erosen@juniper.net</a>&gt;, &quot;<a href=3D"mailto:idr@i=
etf.org" target=3D"_blank">idr@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr=
@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:=
draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tun=
nel-encaps@<wbr>ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-idr-tun=
nel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-encaps@<wbr>ie=
tf.org</a>&gt;</span></p><div><div class=3D"h5"><br><b>Subject: </b>Re: [Id=
r] Possible to set up priority for Tunnels established by draft-ietf-idr-tu=
nnel-encaps-<wbr>09 ?<u></u><u></u></div></div><p></p></div><div><div class=
=3D"h5"><div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div><div><div=
><p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;A=
rial&quot;,sans-serif">Hi Linda,<u></u><u></u></span></p></div><div><p clas=
s=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quo=
t;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNor=
mal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-ser=
if">I think Jeff is asking why not to use well known community to scope the=
 blast radius of the advertisement.=C2=A0<u></u><u></u></span></p></div><di=
v><p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;=
Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=
=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot=
;,sans-serif">But personally I think this is pretty weak protection - if th=
is would be the only protection against IPSec credential&#39;s hijack. IMO =
this needs to be protected a bit stronger such that even leak of the update=
 will cause no harm or VPN compromise.<u></u><u></u></span></p></div><div><=
p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ari=
al&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"=
MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sa=
ns-serif">Thx,<br>R.<u></u><u></u></span></p></div><div><p class=3D"MsoNorm=
al"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-seri=
f"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span s=
tyle=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=
=C2=A0<u></u></span></p></div></div><div><p class=3D"MsoNormal"><u></u>=C2=
=A0<u></u></p><div><p class=3D"MsoNormal">On Mon, Jul 9, 2018 at 10:50 PM, =
Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blan=
k">linda.dunbar@huawei.com</a>&gt; wrote:<u></u><u></u></p><blockquote styl=
e=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;=
margin-left:4.8pt;margin-right:0in"><div><div><p class=3D"MsoNormal"><span =
style=3D"color:#1f497d">Jeff, </span><u></u><u></u></p><p class=3D"MsoNorma=
l"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u></u></p><p class=3D=
"MsoNormal"><span style=3D"color:#1f497d">The answer to your question =E2=
=80=9C</span>Why would you want to build what you are trying to do into pro=
tocol?=E2=80=9D <span style=3D"color:#1f497d">is </span><u></u><u></u></p><=
p class=3D"m_-5166219577338699169m5848266144591628402msolistparagraph">-<sp=
an style=3D"font-size:7.0pt;font-family:&quot;Times New Roman&quot;,serif">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span><span style=3D"color:#1f4=
97d">We want to use BGP to do more (i.e. </span>use RR to distribute inform=
ation injected from and by a controller). <span style=3D"color:#1f497d">to =
eliminate dealing with the changes to NHRP/DSVPN. </span><u></u><u></u></p>=
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d">Can you elabo=
rate the =E2=80=9C</span>the existing technology=E2=80=9D?<u></u><u></u></p=
><p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><=
u></u></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d">Linda</span>=
</p></div></div></blockquote></div></div></div></div></div></div></blockquo=
te></div></div></div>

--0000000000003b97830570976ccc--


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To: Linda Dunbar <linda.dunbar@huawei.com>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/OwPZao552ZPK4eC38uARJaY3dwU>
Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Because the NO_ADVERTISE is about the property of the NLRI - entire BGP
UPDATE MSG get's blocked while in section 10 it is about just dropping a
single attribute which happened to be attached to a perhaps still valid
UPDATE MSG.



On Mon, Jul 9, 2018 at 11:05 PM, Linda Dunbar <linda.dunbar@huawei.com>
wrote:

> Eric,
>
>
>
> Why not using =E2=80=9CNO_ADVERTISE=E2=80=9D in the Section 10 of
> draft-ietf-idr-tunnel-encaps-09?
>
>
>
>
>
> Linda
>
>
>
> *From:* Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
> *Sent:* Monday, July 09, 2018 3:25 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Hi Linda,
>
>
>
> Why would you want to build what you are trying to do into protocol?
>
> #1 local policy
>
> #2  NO_ADVERTISE does that exactly
>
>
>
> Cheers,
>
> Jeff
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <
> linda.dunbar@huawei.com>
> *Date: *Monday, July 9, 2018 at 13:14
> *To: *Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "
> draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@
> ietf.org>
> *Subject: *[Idr] Possible to set up priority for Tunnels established by
> draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Eric,
>
>
>
> draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of
> multiple UPDATE messages with Tunnel Encap attributes.
>
>
>
> Is it possible to have following capability?
>
> -        Have a bit indicating a specific UPDATE is from authoritative
> source, therefore overwrite all other Tunnel Attributes for the Prefix X =
to
> avoid recursive next hop issues and tunnel selection at the receiving
> Router?
>
> -        Have a bit indicating that a specific UPDATE only contain Tunnel
> attributes for the receiving Router, therefore can=E2=80=99t be forwarded=
?
>
>
>
> You said that SAFI 7 is deprecated because no one seemed interested in
> using it. We are very interested in using it because
>
> -        it can be easily distinguished from normal  BGP UPDATE
>
> -         The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=
=80=9D the tunnel
> attributes before forwarding to others.
>
> -        Can even be used for passing reconfigured IPsec keys to two ends
> of a tunnel.
>
>
>
> Therefore we think SAFI 7 should be reserved.
>
>
>
> Thanks, Linda Dunbar
>
>
>
> *From:* Eric C Rosen [mailto:erosen@juniper.net <erosen@juniper.net>]
> *Sent:* Tuesday, July 03, 2018 12:21 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org;
> draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: What are side effect for having Encap SAFI? can
> draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before
> VPN is established?
>
>
>
> On 7/2/2018 6:31 PM, Linda Dunbar wrote:
>
> Eric, IDR group,
>
>
>
> It is indicated that RFC5512 is to be replaced by
> draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-09 stated
> that it deprecates the
>
> Encapsulation SAFI.
>
>
>
> We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For
> example, a Controller (say RR) can send an update with Encapsulation SAFI
> to two end points to trigger a tunnel establishment between them.
>
> What are side effect for having Encap SAFI? Can we preserve it in
> draft-ietf-idr-tunnel-encaps?
>
>
>
> Thanks, Linda Dunbar
>
>
>
>
> SAFI 7 was deprecated because no one seemed interested in using it, it
> creates additional operational issues, there is no real need for it, and =
it
> was discouraging folks from actually using the Tunnel Encapsulation
> attribute.  This is discussed briefly in section 1.2 of the draft.
>
> You can get a similar effect by using the technique described in section =
7
> of the draft.
>
> If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whos=
e
> NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute
> (with PE1 as remote endpoint) on this UPDATE.  (The next hop field of thi=
s
> UPDATE doesn't really matter, as long as it is resolvable.)  When PE1
> originates VPN routes, it sets the next hop to be its loopback address.
> Per section 7, this will result in packets being sent to PE1 though the
> specified tunnel.
>
>
>
> _______________________________________________ Idr mailing list
> Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--000000000000dea8f205709778e8
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Because th=
e NO_ADVERTISE is about the property of the NLRI - entire BGP UPDATE MSG ge=
t&#39;s blocked while in section 10 it is about just dropping a single attr=
ibute which happened to be attached to a perhaps still valid UPDATE MSG.</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div></div><div cla=
ss=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jul 9, 2018 at 11=
:05 PM, Linda Dunbar <span dir=3D"ltr">&lt;<a href=3D"mailto:linda.dunbar@h=
uawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;</span> wrote:<=
br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left=
:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_-8235123748479372747WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, <u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Why not using =E2=80=
=9C</span><span style=3D"color:windowtext">NO_ADVERTISE=E2=80=9D
</span><span style=3D"color:#1f497d">in the Section 10 of draft-ietf-idr-tu=
nnel-encaps-<wbr>09?
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><a name=3D"m_-8235123748479372747__MailEndCompose"><=
span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></span></a></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Linda<u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Jeff Tantsura [mailto:<a href=3D"mailto:j=
efftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gmail.<wbr>com</a>]
<br>
<b>Sent:</b> Monday, July 09, 2018 3:25 PM<span class=3D""><br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;; Eric C Rosen &lt;<a href=3D"=
mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;; <a=
 href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-i=
etf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
</span><b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels es=
tablished by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></span></p=
>
</div>
</div><span class=3D"">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Hi Linda,<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Why would you want =
to build what you are trying to do into protocol?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">#1 local policy<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">#2 =C2=A0NO_ADVERTI=
SE does that exactly
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jeff<span style=3D"color:windowtext"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<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:12.0pt">From: </span></b=
><span style=3D"font-size:12.0pt">Idr &lt;<a href=3D"mailto:idr-bounces@iet=
f.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf of Linda Du=
nbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blank">linda=
.dunbar@huawei.com</a>&gt;<br>
<b>Date: </b>Monday, July 9, 2018 at 13:14<br>
<b>To: </b>Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net" target=3D=
"_blank">erosen@juniper.net</a>&gt;, &quot;<a href=3D"mailto:idr@ietf.org" =
target=3D"_blank">idr@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr@ietf.org=
" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-iet=
f-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-encap=
s@<wbr>ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_bl=
ank">draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a>&gt;<br>
<b>Subject: </b>[Idr] Possible to set up priority for Tunnels established b=
y draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, </span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">draft-ietf-idr-tunnel-=
encaps-<wbr>09 discussed ways to resolve conflicts of multiple UPDATE messa=
ges with Tunnel Encap attributes.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Is it possible to have=
 following capability?
</span><u></u><u></u></p>
</span><p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">Have a bit indicating a =
specific UPDATE is from authoritative source, therefore overwrite all other=
 Tunnel Attributes for the Prefix X to avoid recursive next hop issues and =
tunnel selection at the receiving
 Router? </span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">Have a bit indicating th=
at a specific UPDATE only contain Tunnel attributes for the receiving Route=
r, therefore can=E2=80=99t be forwarded?
</span><u></u><u></u></p><span class=3D"">
<p class=3D"m_-8235123748479372747MsoListParagraph"><span style=3D"color:#1=
f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">You said that SAFI 7 i=
s deprecated because no one seemed interested in using it. We are very inte=
rested in using it because
</span><u></u><u></u></p>
</span><p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">it can be easily disting=
uished from normal =C2=A0BGP UPDATE</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">=C2=A0The receiving rout=
er doesn=E2=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes b=
efore forwarding to others. =C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
<u></u><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span><u></u><span style=3D"color:#1f497d">Can even be used for pas=
sing reconfigured IPsec keys to two ends of a tunnel.
</span><u></u><u></u></p><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Therefore we think SAF=
I 7 should be reserved.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></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"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Eric C Rosen [<a href=3D"mailto:erosen@ju=
niper.net" target=3D"_blank">mailto:erosen@juniper.net</a>]
<br>
<b>Sent:</b> Tuesday, July 03, 2018 12:21 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: What are side effect for having Encap SAFI? can draft-i=
etf-idr-tunnel-encaps-<wbr>09 preserve trigger tunnel creation before VPN i=
s established?</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On 7/2/2018 6:31 PM, =
Linda Dunbar wrote:<br>
<br>
<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, IDR group, </spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"color:#=
1f497d">It is indicated that RFC5512 is to be replaced by draft-ietf-idr-tu=
nnel-encaps. But draft-ietf-idr-tunnel-encaps-<wbr>09 stated that it
</span><span style=3D"font-size:10.0pt;font-family:Courier;color:windowtext=
">deprecates the</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">Encapsulation SAFI.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier;=
color:windowtext">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">We find the Encapsulat=
ion SAFI is quite useful for CPE based EVPN.=C2=A0 For example, a Controlle=
r (say RR) can send an update with Encapsulation SAFI to two end points to =
trigger a tunnel establishment between them.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">What are side effect f=
or having Encap SAFI? Can we preserve it in draft-ietf-idr-tunnel-encaps?</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><br>
SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was=
 discouraging folks from actually using the Tunnel Encapsulation attribute.=
=C2=A0 This is discussed briefly in section
 1.2 of the draft.<br>
<br>
You can get a similar effect by using the technique described in section 7 =
of the draft.<br>
<br>
If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1&#39;s loopback address.=C2=A0 Put the Tunnel Encapsulation attr=
ibute (with PE1 as remote endpoint) on this UPDATE.=C2=A0 (The next hop fie=
ld of this UPDATE doesn&#39;t really matter, as long
 as it is resolvable.)=C2=A0 When PE1 originates VPN routes, it sets the ne=
xt hop to be its loopback address.=C2=A0 Per section 7, this will result in=
 packets being sent to PE1 though the specified tunnel.<br>
<br>
=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">___________________=
___________<wbr>_________________ Idr mailing list
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a> <a href=
=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">
https://www.ietf.org/mailman/<wbr>listinfo/idr</a> <u></u><u></u></span></p=
>
</span></div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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From: Keyur Patel <keyur@arrcus.com>
To: Robert Raszuk <robert@raszuk.net>
CC: Linda Dunbar <linda.dunbar@huawei.com>, Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Robert Raszuk <robert@raszuk.net>
CC: Jeff Tantsura <jefftant.ietf@gmail.com>, Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Date: Mon, 9 Jul 2018 21:20:12 +0000
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 9 Jul 2018 23:29:22 +0200
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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IMO both are needed.

The original drivers for tunnel encapsulation attribute clearly proved that
new SAFI is an excessive thing. Please note that in any SAFI you can easily
craft independent BGP MSG without need for separate AFI/SAFI type.

Said this however for the SD-WAN application we are discussing here I would
be actually in favor of separating it from any other BGP use by dedicating
a new AFI/SAFI for it.

Thx,
R.

On Mon, Jul 9, 2018 at 11:20 PM, Linda Dunbar <linda.dunbar@huawei.com>
wrote:

> That is one of the main reason we think it is better to have a dedicated
> message to pass =E2=80=9CTunnel Encap attributes=E2=80=9D instead of appe=
nded to the BGP
> update message.
>
> It is so much easier for CPEs to process an Independent =E2=80=9Ctunnel a=
ttribute=E2=80=9D
> information instead of filtering out which field can/can=E2=80=99t be dis=
tribute to
> others.
>
>
>
> Linda
>
>
>
> *From:* rraszuk@gmail.com [mailto:rraszuk@gmail.com] *On Behalf Of *Rober=
t
> Raszuk
> *Sent:* Monday, July 09, 2018 4:13 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>
> *Cc:* Jeff Tantsura <jefftant.ietf@gmail.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
>
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
>
>
> Because the NO_ADVERTISE is about the property of the NLRI - entire BGP
> UPDATE MSG get's blocked while in section 10 it is about just dropping a
> single attribute which happened to be attached to a perhaps still valid
> UPDATE MSG.
>
>
>
>
>
>
>
> On Mon, Jul 9, 2018 at 11:05 PM, Linda Dunbar <linda.dunbar@huawei.com>
> wrote:
>
> Eric,
>
>
>
> Why not using =E2=80=9CNO_ADVERTISE=E2=80=9D in the Section 10 of
> draft-ietf-idr-tunnel-encaps-09?
>
>
>
>
>
> Linda
>
>
>
> *From:* Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
> *Sent:* Monday, July 09, 2018 3:25 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Hi Linda,
>
>
>
> Why would you want to build what you are trying to do into protocol?
>
> #1 local policy
>
> #2  NO_ADVERTISE does that exactly
>
>
>
> Cheers,
>
> Jeff
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <
> linda.dunbar@huawei.com>
> *Date: *Monday, July 9, 2018 at 13:14
> *To: *Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "
> draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@
> ietf.org>
> *Subject: *[Idr] Possible to set up priority for Tunnels established by
> draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Eric,
>
>
>
> draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of
> multiple UPDATE messages with Tunnel Encap attributes.
>
>
>
> Is it possible to have following capability?
>
> -        Have a bit indicating a specific UPDATE is from authoritative
> source, therefore overwrite all other Tunnel Attributes for the Prefix X =
to
> avoid recursive next hop issues and tunnel selection at the receiving
> Router?
>
> -        Have a bit indicating that a specific UPDATE only contain Tunnel
> attributes for the receiving Router, therefore can=E2=80=99t be forwarded=
?
>
>
>
> You said that SAFI 7 is deprecated because no one seemed interested in
> using it. We are very interested in using it because
>
> -        it can be easily distinguished from normal  BGP UPDATE
>
> -         The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=
=80=9D the tunnel
> attributes before forwarding to others.
>
> -        Can even be used for passing reconfigured IPsec keys to two ends
> of a tunnel.
>
>
>
> Therefore we think SAFI 7 should be reserved.
>
>
>
> Thanks, Linda Dunbar
>
>
>
> *From:* Eric C Rosen [mailto:erosen@juniper.net <erosen@juniper.net>]
> *Sent:* Tuesday, July 03, 2018 12:21 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org;
> draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: What are side effect for having Encap SAFI? can
> draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before
> VPN is established?
>
>
>
> On 7/2/2018 6:31 PM, Linda Dunbar wrote:
>
> Eric, IDR group,
>
>
>
> It is indicated that RFC5512 is to be replaced by
> draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-09 stated
> that it deprecates the
>
> Encapsulation SAFI.
>
>
>
> We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For
> example, a Controller (say RR) can send an update with Encapsulation SAFI
> to two end points to trigger a tunnel establishment between them.
>
> What are side effect for having Encap SAFI? Can we preserve it in
> draft-ietf-idr-tunnel-encaps?
>
>
>
> Thanks, Linda Dunbar
>
>
>
>
> SAFI 7 was deprecated because no one seemed interested in using it, it
> creates additional operational issues, there is no real need for it, and =
it
> was discouraging folks from actually using the Tunnel Encapsulation
> attribute.  This is discussed briefly in section 1.2 of the draft.
>
> You can get a similar effect by using the technique described in section =
7
> of the draft.
>
> If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whos=
e
> NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute
> (with PE1 as remote endpoint) on this UPDATE.  (The next hop field of thi=
s
> UPDATE doesn't really matter, as long as it is resolvable.)  When PE1
> originates VPN routes, it sets the next hop to be its loopback address.
> Per section 7, this will result in packets being sent to PE1 though the
> specified tunnel.
>
>
>
> _______________________________________________ Idr mailing list
> Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--0000000000000b11d2057097b5b9
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">IMO both are needed.=C2=A0</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">The original drivers for tunnel en=
capsulation attribute clearly proved that new SAFI is an excessive thing. P=
lease note that in any SAFI you can easily craft independent BGP MSG withou=
t need for separate AFI/SAFI type.=C2=A0</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Said this however for the SD-WAN application we are disc=
ussing here I would be actually in favor of separating it from any other BG=
P use by dedicating a new AFI/SAFI for it.=C2=A0</div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">Thx,<br>R.</div></div><div class=3D"gmail_extra"=
><br><div class=3D"gmail_quote">On Mon, Jul 9, 2018 at 11:20 PM, Linda Dunb=
ar <span dir=3D"ltr">&lt;<a href=3D"mailto:linda.dunbar@huawei.com" target=
=3D"_blank">linda.dunbar@huawei.com</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-8977892626784262840WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">That is one of the main reason we thi=
nk it is better to have a dedicated message to pass =E2=80=9CTunnel Encap a=
ttributes=E2=80=9D instead of appended to the BGP update message.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">It is so much easier for CPEs to proc=
ess an Independent =E2=80=9Ctunnel attribute=E2=80=9D information instead o=
f filtering out which field can/can=E2=80=99t be distribute to others.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Linda
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><a name=3D"m_-8977892626784262840__MailEndCompose"><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1f497d"><u></u>=C2=A0<u></u></span></a></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> <a href=3D"mailto:rraszuk@gmai=
l.com" target=3D"_blank">rraszuk@gmail.com</a> [mailto:<a href=3D"mailto:rr=
aszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Monday, July 09, 2018 4:13 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br>
<b>Cc:</b> Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" tar=
get=3D"_blank">jefftant.ietf@gmail.com</a>&gt;; Eric C Rosen &lt;<a href=3D=
"mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;; <=
a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-i=
etf-idr-tunnel-encaps@<wbr>ietf.org</a></span></p><div><div class=3D"h5"><b=
r>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></div></div><p></=
p><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Because the NO_ADVERTISE is about the property of the NLRI - entire BG=
P UPDATE MSG get&#39;s blocked while in section 10 it is about just droppin=
g a single attribute which happened to be attached
 to a perhaps still valid UPDATE MSG.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jul 9, 2018 at 11:05 PM, Linda Dunbar &lt;<a=
 href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@hua=
wei.com</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Why not using =E2=80=
=9C</span>NO_ADVERTISE=E2=80=9D
<span style=3D"color:#1f497d">in the Section 10 of draft-ietf-idr-tunnel-en=
caps-<wbr>09?
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-8977892626784262840_m_-823512374847937=
2747__MailEndCompose"><span style=3D"color:#1f497d">=C2=A0</span></a><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Linda</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Jeff Tantsura [mailto:<a href=3D"mailto=
:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gmail.<wbr>com</a=
>]
<br>
<b>Sent:</b> Monday, July 09, 2018 3:25 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;; Eric C Rosen &lt;<a href=3D"=
mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Hi Linda,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Why would you want to build what you are trying to d=
o into protocol?<u></u><u></u></p>
<p class=3D"MsoNormal">#1 local policy<u></u><u></u></p>
<p class=3D"MsoNormal">#2 =C2=A0NO_ADVERTISE does that exactly
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jeff<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:
</b>Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-b=
ounces@ietf.org</a>&gt; on behalf of Linda Dunbar &lt;<a href=3D"mailto:lin=
da.dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br>
<b>Date: </b>Monday, July 9, 2018 at 13:14<br>
<b>To: </b>Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net" target=3D=
"_blank">erosen@juniper.net</a>&gt;, &quot;<a href=3D"mailto:idr@ietf.org" =
target=3D"_blank">idr@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr@ietf.org=
" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-iet=
f-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-encap=
s@<wbr>ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_bl=
ank">draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a>&gt;<br>
<b>Subject: </b>[Idr] Possible to set up priority for Tunnels established b=
y draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">draft-ietf-idr-tunnel-=
encaps-<wbr>09 discussed ways to resolve conflicts of multiple UPDATE messa=
ges with Tunnel Encap attributes.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Is it possible to have=
 following capability?
</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">Have a bit indicating a specific UPDA=
TE is from authoritative source, therefore overwrite all other Tunnel Attri=
butes for the Prefix X to avoid recursive next hop issues and tunnel select=
ion
 at the receiving Router? </span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">Have a bit indicating that a specific=
 UPDATE only contain Tunnel attributes for the receiving Router, therefore =
can=E2=80=99t be forwarded?
</span><u></u><u></u></p>
<p class=3D"m_-8977892626784262840m-8235123748479372747msolistparagraph"><s=
pan style=3D"color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">You said that SAFI 7 i=
s deprecated because no one seemed interested in using it. We are very inte=
rested in using it because
</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">it can be easily distinguished from n=
ormal =C2=A0BGP UPDATE</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">=C2=A0The receiving router doesn=E2=
=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes before forwa=
rding to others. =C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">Can even be used for passing reconfig=
ured IPsec keys to two ends of a tunnel.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Therefore we think SAF=
I 7 should be reserved.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Eric C Rosen [<a href=3D"mailto:erosen@=
juniper.net" target=3D"_blank">mailto:erosen@juniper.net</a>]
<br>
<b>Sent:</b> Tuesday, July 03, 2018 12:21 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: What are side effect for having Encap SAFI? can draft-i=
etf-idr-tunnel-encaps-<wbr>09 preserve trigger tunnel creation before VPN i=
s established?<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On 7/2/2018 6:31 PM, =
Linda Dunbar wrote:<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, IDR group,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none">
<span style=3D"color:#1f497d">It is indicated that RFC5512 is to be replace=
d by draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-<wbr>09=
 stated that it
</span><span style=3D"font-size:10.0pt;font-family:Courier">deprecates the<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier"=
>Encapsulation SAFI.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier"=
>=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">We find the Encapsulat=
ion SAFI is quite useful for CPE based EVPN.=C2=A0 For example, a Controlle=
r (say RR) can send an update with Encapsulation SAFI to
 two end points to trigger a tunnel establishment between them. </span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">What are side effect f=
or having Encap SAFI? Can we preserve it in draft-ietf-idr-tunnel-encaps?</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
</blockquote>
<p class=3D"MsoNormal"><br>
SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was=
 discouraging folks from actually using the Tunnel Encapsulation attribute.=
=C2=A0 This is discussed briefly in section
 1.2 of the draft.<br>
<br>
You can get a similar effect by using the technique described in section 7 =
of the draft.<br>
<br>
If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1&#39;s loopback address.=C2=A0 Put the Tunnel Encapsulation attr=
ibute (with PE1 as remote endpoint) on this UPDATE.=C2=A0 (The next hop fie=
ld of this UPDATE doesn&#39;t really matter, as long
 as it is resolvable.)=C2=A0 When PE1 originates VPN routes, it sets the ne=
xt hop to be its loopback address.=C2=A0 Per section 7, this will result in=
 packets being sent to PE1 though the specified tunnel.<br>
<br>
=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">______________________________<wbr>_________________=
 Idr mailing list
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a> <a href=
=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">
https://www.ietf.org/mailman/<wbr>listinfo/idr</a> <u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">htt=
ps://www.ietf.org/mailman/<wbr>listinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Robert Raszuk <robert@raszuk.net>
CC: "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Date: Mon, 9 Jul 2018 21:34:35 +0000
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 9 Jul 2018 23:43:44 +0200
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To: Linda Dunbar <linda.dunbar@huawei.com>
Cc: "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/FTE6wqVGJ7yxhVmT-Q_AlUFZbuo>
Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Hi Linda,

In addition to your comment what needs to also be highlighted in bold is
that new SAFI will help the co-existence with number of existing SD-WAN
deployments. Loading currently deployed controllers with any of the
existing unicast SAFIs no matter how well filtered will not be a great idea
operationally.

The point about missing DTLS has been communicated to Eric the same day his
and Ron's draft got posted. It was accepted well :).

Best,
R.

On Mon, Jul 9, 2018 at 11:34 PM, Linda Dunbar <linda.dunbar@huawei.com>
wrote:

> Thanks Robert=E2=80=99s suggesting of having a new ARI/SAFI for SD-WAN.
>
>
>
> An independent SAFI for SD-WAN would make our implementation easier. In
> addition in SD-WAN deployment the RR and CPE might be connected by
> TLS/DTLS.
>
>
>
> Linda
>
>
>
> *From:* rraszuk@gmail.com [mailto:rraszuk@gmail.com] *On Behalf Of *Rober=
t
> Raszuk
> *Sent:* Monday, July 09, 2018 4:29 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>
> *Cc:* idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
>
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> IMO both are needed.
>
>
>
> The original drivers for tunnel encapsulation attribute clearly proved
> that new SAFI is an excessive thing. Please note that in any SAFI you can
> easily craft independent BGP MSG without need for separate AFI/SAFI type.
>
>
>
> Said this however for the SD-WAN application we are discussing here I
> would be actually in favor of separating it from any other BGP use by
> dedicating a new AFI/SAFI for it.
>
>
>
> Thx,
> R.
>
>
>
> On Mon, Jul 9, 2018 at 11:20 PM, Linda Dunbar <linda.dunbar@huawei.com>
> wrote:
>
> That is one of the main reason we think it is better to have a dedicated
> message to pass =E2=80=9CTunnel Encap attributes=E2=80=9D instead of appe=
nded to the BGP
> update message.
>
> It is so much easier for CPEs to process an Independent =E2=80=9Ctunnel a=
ttribute=E2=80=9D
> information instead of filtering out which field can/can=E2=80=99t be dis=
tribute to
> others.
>
>
>
> Linda
>
>
>
> *From:* rraszuk@gmail.com [mailto:rraszuk@gmail.com] *On Behalf Of *Rober=
t
> Raszuk
> *Sent:* Monday, July 09, 2018 4:13 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>
> *Cc:* Jeff Tantsura <jefftant.ietf@gmail.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
>
>
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
>
>
> Because the NO_ADVERTISE is about the property of the NLRI - entire BGP
> UPDATE MSG get's blocked while in section 10 it is about just dropping a
> single attribute which happened to be attached to a perhaps still valid
> UPDATE MSG.
>
>
>
>
>
>
>
> On Mon, Jul 9, 2018 at 11:05 PM, Linda Dunbar <linda.dunbar@huawei.com>
> wrote:
>
> Eric,
>
>
>
> Why not using =E2=80=9CNO_ADVERTISE=E2=80=9D in the Section 10 of
> draft-ietf-idr-tunnel-encaps-09?
>
>
>
>
>
> Linda
>
>
>
> *From:* Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
> *Sent:* Monday, July 09, 2018 3:25 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; Eric C Rosen <
> erosen@juniper.net>; idr@ietf.org; draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: [Idr] Possible to set up priority for Tunnels established
> by draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Hi Linda,
>
>
>
> Why would you want to build what you are trying to do into protocol?
>
> #1 local policy
>
> #2  NO_ADVERTISE does that exactly
>
>
>
> Cheers,
>
> Jeff
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of Linda Dunbar <
> linda.dunbar@huawei.com>
> *Date: *Monday, July 9, 2018 at 13:14
> *To: *Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "
> draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@
> ietf.org>
> *Subject: *[Idr] Possible to set up priority for Tunnels established by
> draft-ietf-idr-tunnel-encaps-09 ?
>
>
>
> Eric,
>
>
>
> draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of
> multiple UPDATE messages with Tunnel Encap attributes.
>
>
>
> Is it possible to have following capability?
>
> -        Have a bit indicating a specific UPDATE is from authoritative
> source, therefore overwrite all other Tunnel Attributes for the Prefix X =
to
> avoid recursive next hop issues and tunnel selection at the receiving
> Router?
>
> -        Have a bit indicating that a specific UPDATE only contain Tunnel
> attributes for the receiving Router, therefore can=E2=80=99t be forwarded=
?
>
>
>
> You said that SAFI 7 is deprecated because no one seemed interested in
> using it. We are very interested in using it because
>
> -        it can be easily distinguished from normal  BGP UPDATE
>
> -         The receiving router doesn=E2=80=99t have to =E2=80=9CFilter=E2=
=80=9D the tunnel
> attributes before forwarding to others.
>
> -        Can even be used for passing reconfigured IPsec keys to two ends
> of a tunnel.
>
>
>
> Therefore we think SAFI 7 should be reserved.
>
>
>
> Thanks, Linda Dunbar
>
>
>
> *From:* Eric C Rosen [mailto:erosen@juniper.net <erosen@juniper.net>]
> *Sent:* Tuesday, July 03, 2018 12:21 PM
> *To:* Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org;
> draft-ietf-idr-tunnel-encaps@ietf.org
> *Subject:* Re: What are side effect for having Encap SAFI? can
> draft-ietf-idr-tunnel-encaps-09 preserve trigger tunnel creation before
> VPN is established?
>
>
>
> On 7/2/2018 6:31 PM, Linda Dunbar wrote:
>
> Eric, IDR group,
>
>
>
> It is indicated that RFC5512 is to be replaced by
> draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-09 stated
> that it deprecates the
>
> Encapsulation SAFI.
>
>
>
> We find the Encapsulation SAFI is quite useful for CPE based EVPN.  For
> example, a Controller (say RR) can send an update with Encapsulation SAFI
> to two end points to trigger a tunnel establishment between them.
>
> What are side effect for having Encap SAFI? Can we preserve it in
> draft-ietf-idr-tunnel-encaps?
>
>
>
> Thanks, Linda Dunbar
>
>
>
>
> SAFI 7 was deprecated because no one seemed interested in using it, it
> creates additional operational issues, there is no real need for it, and =
it
> was discouraging folks from actually using the Tunnel Encapsulation
> attribute.  This is discussed briefly in section 1.2 of the draft.
>
> You can get a similar effect by using the technique described in section =
7
> of the draft.
>
> If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whos=
e
> NLRI is PE1's loopback address.  Put the Tunnel Encapsulation attribute
> (with PE1 as remote endpoint) on this UPDATE.  (The next hop field of thi=
s
> UPDATE doesn't really matter, as long as it is resolvable.)  When PE1
> originates VPN routes, it sets the next hop to be its loopback address.
> Per section 7, this will result in packets being sent to PE1 though the
> specified tunnel.
>
>
>
> _______________________________________________ Idr mailing list
> Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Linda,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">In addition to your comment what needs to also be h=
ighlighted in bold is that new SAFI will help the co-existence with number =
of existing SD-WAN deployments. Loading currently deployed controllers with=
 any of the existing unicast SAFIs no matter how well filtered will not be =
a great idea operationally.=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">The point about missing DTLS has been communicated to Eric th=
e same day his and Ron&#39;s draft got posted. It was accepted well :).=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">Best,<br>R.</div><=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jul =
9, 2018 at 11:34 PM, Linda Dunbar <span dir=3D"ltr">&lt;<a href=3D"mailto:l=
inda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;</=
span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8e=
x;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-4369908078680049675WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanks Robert=E2=80=99s suggesting of=
 having a new ARI/SAFI for SD-WAN.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">An independent SAFI for SD-WAN would =
make our implementation easier. In addition in SD-WAN deployment the RR and=
 CPE might be connected by TLS/DTLS.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Linda<u></u><u></u></span></p>
<p class=3D"MsoNormal"><a name=3D"m_-4369908078680049675__MailEndCompose"><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1f497d"><u></u>=C2=A0<u></u></span></a></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> <a href=3D"mailto:rraszuk@gmai=
l.com" target=3D"_blank">rraszuk@gmail.com</a> [mailto:<a href=3D"mailto:rr=
aszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Monday, July 09, 2018 4:29 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</=
a>; <a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_bla=
nk">draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a></span></p><div><div clas=
s=3D"h5"><br>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></div></div><p></=
p><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">IMO both are needed.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">The original drivers for tunnel encapsulation attribute clearly proved=
 that new SAFI is an excessive thing. Please note that in any SAFI you can =
easily craft independent BGP MSG without need
 for separate AFI/SAFI type.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Said this however for the SD-WAN application we are discussing here I =
would be actually in favor of separating it from any other BGP use by dedic=
ating a new AFI/SAFI for it.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<br>
R.<u></u><u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jul 9, 2018 at 11:20 PM, Linda Dunbar &lt;<a=
 href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@hua=
wei.com</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">That is one of the main reason we thi=
nk it is better to have a dedicated message to pass =E2=80=9CTunnel Encap
 attributes=E2=80=9D instead of appended to the BGP update message. </span>=
<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">It is so much easier for CPEs to proc=
ess an Independent =E2=80=9Ctunnel attribute=E2=80=9D information instead o=
f filtering
 out which field can/can=E2=80=99t be distribute to others. </span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Linda
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-4369908078680049675_m_-897789262678426=
2840__MailEndCompose"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:#1f497d">=C2=A0</span></a><u></u><u></u></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif">
<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a=
> [mailto:<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gm=
ail.com</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Monday, July 09, 2018 4:13 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br>
<b>Cc:</b> Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" tar=
get=3D"_blank">jefftant.ietf@gmail.com</a>&gt;; Eric C Rosen &lt;<a href=3D=
"mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a></span><u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><br>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Because the NO_ADVERTISE is about the property of the NLRI - entire BG=
P UPDATE MSG get&#39;s blocked while in section 10 it is about just
 dropping a single attribute which happened to be attached to a perhaps sti=
ll valid UPDATE MSG.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jul 9, 2018 at 11:05 PM, Linda Dunbar &lt;<a=
 href=3D"mailto:linda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@hua=
wei.com</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Why not using =E2=80=
=9C</span>NO_ADVERTISE=E2=80=9D
<span style=3D"color:#1f497d">in the Section 10 of draft-ietf-idr-tunnel-en=
caps-<wbr>09?
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-4369908078680049675_m_-897789262678426=
2840_m_-82351237484793"><span style=3D"color:#1f497d">=C2=A0</span></a><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Linda</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Jeff Tantsura [mailto:<a href=3D"mailto=
:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gmail.<wbr>com</a=
>]
<br>
<b>Sent:</b> Monday, July 09, 2018 3:25 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;; Eric C Rosen &lt;<a href=3D"=
mailto:erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: [Idr] Possible to set up priority for Tunnels establish=
ed by draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Hi Linda,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Why would you want to build what you are trying to d=
o into protocol?<u></u><u></u></p>
<p class=3D"MsoNormal">#1 local policy<u></u><u></u></p>
<p class=3D"MsoNormal">#2 =C2=A0NO_ADVERTISE does that exactly
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jeff<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:
</b>Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-b=
ounces@ietf.org</a>&gt; on behalf of Linda Dunbar &lt;<a href=3D"mailto:lin=
da.dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</a>&gt;<br>
<b>Date: </b>Monday, July 9, 2018 at 13:14<br>
<b>To: </b>Eric C Rosen &lt;<a href=3D"mailto:erosen@juniper.net" target=3D=
"_blank">erosen@juniper.net</a>&gt;, &quot;<a href=3D"mailto:idr@ietf.org" =
target=3D"_blank">idr@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr@ietf.org=
" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-iet=
f-idr-tunnel-encaps@ietf.org" target=3D"_blank">draft-ietf-idr-tunnel-encap=
s@<wbr>ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_bl=
ank">draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a>&gt;<br>
<b>Subject: </b>[Idr] Possible to set up priority for Tunnels established b=
y draft-ietf-idr-tunnel-encaps-<wbr>09 ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">draft-ietf-idr-tunnel-=
encaps-<wbr>09 discussed ways to resolve conflicts of multiple UPDATE messa=
ges with Tunnel Encap attributes.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Is it possible to have=
 following capability?
</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">Have a bit indicating a specific UPDA=
TE is from authoritative source, therefore overwrite all other Tunnel Attri=
butes for the Prefix X to avoid recursive next hop issues and tunnel select=
ion
 at the receiving Router? </span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">Have a bit indicating that a specific=
 UPDATE only contain Tunnel attributes for the receiving Router, therefore =
can=E2=80=99t be forwarded?
</span><u></u><u></u></p>
<p class=3D"m_-4369908078680049675m-8977892626784262840m-823512374847937274=
7msolistparagraph"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u></u=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">You said that SAFI 7 i=
s deprecated because no one seemed interested in using it. We are very inte=
rested in using it because
</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">it can be easily distinguished from n=
ormal =C2=A0BGP UPDATE</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">=C2=A0The receiving router doesn=E2=
=80=99t have to =E2=80=9CFilter=E2=80=9D the tunnel attributes before forwa=
rding to others. =C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in">
-<span style=3D"font-size:7.0pt">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span><span style=3D"color:#1f497d">Can even be used for passing reconfig=
ured IPsec keys to two ends of a tunnel.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Therefore we think SAF=
I 7 should be reserved.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Eric C Rosen [<a href=3D"mailto:erosen@=
juniper.net" target=3D"_blank">mailto:erosen@juniper.net</a>]
<br>
<b>Sent:</b> Tuesday, July 03, 2018 12:21 PM<br>
<b>To:</b> Linda Dunbar &lt;<a href=3D"mailto:linda.dunbar@huawei.com" targ=
et=3D"_blank">linda.dunbar@huawei.com</a>&gt;;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-tunnel-encaps@ietf.org" target=3D"_blank">
draft-ietf-idr-tunnel-encaps@<wbr>ietf.org</a><br>
<b>Subject:</b> Re: What are side effect for having Encap SAFI? can draft-i=
etf-idr-tunnel-encaps-<wbr>09 preserve trigger tunnel creation before VPN i=
s established?<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On 7/2/2018 6:31 PM, =
Linda Dunbar wrote:<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Eric, IDR group,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none">
<span style=3D"color:#1f497d">It is indicated that RFC5512 is to be replace=
d by draft-ietf-idr-tunnel-encaps. But draft-ietf-idr-tunnel-encaps-<wbr>09=
 stated that it
</span><span style=3D"font-size:10.0pt;font-family:Courier">deprecates the<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier"=
>Encapsulation SAFI.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:Courier"=
>=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">We find the Encapsulat=
ion SAFI is quite useful for CPE based EVPN.=C2=A0 For example, a Controlle=
r (say RR) can send an update with Encapsulation SAFI to
 two end points to trigger a tunnel establishment between them. </span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">What are side effect f=
or having Encap SAFI? Can we preserve it in draft-ietf-idr-tunnel-encaps?</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks, Linda Dunbar</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
</blockquote>
<p class=3D"MsoNormal"><br>
SAFI 7 was deprecated because no one seemed interested in using it, it crea=
tes additional operational issues, there is no real need for it, and it was=
 discouraging folks from actually using the Tunnel Encapsulation attribute.=
=C2=A0 This is discussed briefly in section
 1.2 of the draft.<br>
<br>
You can get a similar effect by using the technique described in section 7 =
of the draft.<br>
<br>
If PE1 is the egress point of a tunnel, have PE1 originate an UPDATE whose =
NLRI is PE1&#39;s loopback address.=C2=A0 Put the Tunnel Encapsulation attr=
ibute (with PE1 as remote endpoint) on this UPDATE.=C2=A0 (The next hop fie=
ld of this UPDATE doesn&#39;t really matter, as long
 as it is resolvable.)=C2=A0 When PE1 originates VPN routes, it sets the ne=
xt hop to be its loopback address.=C2=A0 Per section 7, this will result in=
 packets being sent to PE1 though the specified tunnel.<br>
<br>
=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">______________________________<wbr>_________________=
 Idr mailing list
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a> <a href=
=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">
https://www.ietf.org/mailman/<wbr>listinfo/idr</a> <u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">htt=
ps://www.ietf.org/mailman/<wbr>listinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">htt=
ps://www.ietf.org/mailman/<wbr>listinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>

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

--00000000000069ba08057097e8bd--


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To: Linda Dunbar <linda.dunbar@huawei.com>, Jeff Tantsura <jefftant.ietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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From: Eric C Rosen <erosen@juniper.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fjY2TNwmORZaSos8-sMSIVTe1OE>
Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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On 7/9/2018 4:28 PM, Linda Dunbar wrote:
> We would like to use RR as controller to distribute more detailed 
> tunnel information, such as IPsec configuration & keys because in 
> managed large scale Overlay deployment (SD-WAN), it doesnâ€™t scale to 
> allow all CPEs to negotiate IPsec keys. 

When first working on RFC 5566, I proposed a number of sub-TLVs that 
could be used to convey information about how to set up the IPsec 
Security Associations.Â  None of thes survived review by the security 
experts.Â  Setting up the Security Associations is the job of IKEv2. If 
you want to replace IKEv2 with BGP, you'll need a thorough security 
analysis of your proposed mechanism.

One might think it is okay to have BGP UPDATEs carry secret keys , as 
long as the UPDATEs only travel on sessions that are protected by 
IPsec.Â  I wouldn't necessarily assume that, as BGP UPDATEs have been 
known to leak (intentionally or unintentionally) beyond their intended 
scope.



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    On 7/9/2018 4:28 PM, Linda Dunbar wrote:<br>
    <blockquote type="cite"
cite="mid:4A95BA014132FF49AE685FAB4B9F17F66B0A8BCC@sjceml521-mbs.china.huawei.com"><span
        style="color:#1F497D">We would like to use RR as controller to
        distribute more detailed tunnel information, such as IPsec
        configuration &amp; keys because in managed large scale Overlay
        deployment (SD-WAN), it doesnâ€™t scale to allow all CPEs to
        negotiate IPsec keys. </span></blockquote>
    <br>
    When first working on RFC 5566, I proposed a number of sub-TLVs that
    could be used to convey information about how to set up the IPsec
    Security Associations.Â  None of thes survived review by the security
    experts.Â  Setting up the Security Associations is the job of IKEv2.Â 
    If you want to replace IKEv2 with BGP, you'll need a thorough
    security analysis of your proposed mechanism.<br>
    <br>
    One might think it is okay to have BGP UPDATEs carry secret keys ,
    as long as the UPDATEs only travel on sessions that are protected by
    IPsec.Â  I wouldn't necessarily assume that, as BGP UPDATEs have been
    known to leak (intentionally or unintentionally) beyond their
    intended scope.<br>
    <br>
    <br>
  </body>
</html>

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To: Linda Dunbar <linda.dunbar@huawei.com>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fa3mdSiz4swNtdgxq6J3BUn9dzI>
Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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If you want a controller to use BGP to convey instructions for a 
particular node, there is a draft that does something very similar: 
draft-ietf-idr-segment-routing-te-policy.  That draft defines a new 
AFI/SAFI for conveying segment routing te policies, and the policies are 
encoded as Tunnel Encapsulation attributes.  That draft does require the 
use of the NO_ADVERTISE community when an UPDATE is a command targeted 
to a single router.  The draft also allows the use of Route Targets to 
cover the case where a given  command is targeted to a set of routers, 
as well as the case where the targeted router is separated from the 
controller by a RR or ASBR.  While your application is not about 
sr-te-policies, the way a controller would use BGP to pass the commands 
to the targeted routers is similar; you should take a look.

On 7/9/2018 4:13 PM, Linda Dunbar wrote:
>
> Eric,
>
> draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of 
> multiple UPDATE messages with Tunnel Encap attributes.
>
> Is it possible to have following capability?
>
> -Have a bit indicating a specific UPDATE is from authoritative source, 
> therefore overwrite all other Tunnel Attributes for the Prefix X to 
> avoid recursive next hop issues and tunnel selection at the receiving 
> Router?
>

This is not a good idea.  If you want to verify that a particular UPDATE 
is from an authoritative source, you need a lot more than can be 
conveyed in a single bit.


> -Have a bit indicating that a specific UPDATE only contain Tunnel 
> attributes for the receiving Router, therefore can’t be forwarded?
>

Please compare draft-ietf-idr-segment-routing-te-policy, and its use of 
NO_ADVERTISE and Route Targets.

> You said that SAFI 7 is deprecated because no one seemed interested in 
> using it. We are very interested in using it because
>
> -it can be easily distinguished from normal  BGP UPDATE
>
> - The receiving router doesn’t have to “Filter” the tunnel attributes 
> before forwarding to others.
>
> -Can even be used for passing reconfigured IPsec keys to two ends of a 
> tunnel.
>
> Therefore we think SAFI 7 should be reserved.
>

It sounds like you need to write a draft proposing the specifics of how 
you would like to use BGP as part of your SD-WAN control.  The draft 
would then be free to propose a new SAFI, much as 
draft-ietf-idr-segment-routing-te-policy did.



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    If you want a controller to use BGP to convey instructions for a
    particular node, there is a draft that does something very similar:
    draft-ietf-idr-segment-routing-te-policy.  That draft defines a new
    AFI/SAFI for conveying segment routing te policies, and the policies
    are encoded as Tunnel Encapsulation attributes.  That draft does
    require the use of the NO_ADVERTISE community when an UPDATE is a
    command targeted to a single router.  The draft also allows the use
    of Route Targets to cover the case where a given  command is
    targeted to a set of routers, as well as the case where the targeted
    router is separated from the controller by a RR or ASBR.  While your
    application is not about sr-te-policies, the way a controller would
    use BGP to pass the commands to the targeted routers is similar; you
    should take a look.<br>
    <br>
    <div class="moz-cite-prefix">On 7/9/2018 4:13 PM, Linda Dunbar
      wrote:<br>
    </div>
    <blockquote type="cite"
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ol
	{margin-bottom:0in;}
ul
	{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
      <div class="WordSection1">
        <p class="MsoNormal"><span style="color:#1F497D">Eric, <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">draft-ietf-idr-tunnel-encaps-09
            discussed ways to resolve conflicts of multiple UPDATE
            messages with Tunnel Encap attributes.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Is it possible
            to have following capability?
            <o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
            style="color:#1F497D"><span style="mso-list:Ignore">-<span
                style="font:7.0pt &quot;Times New Roman&quot;">       
              </span></span></span><!--[endif]--><span
            style="color:#1F497D">Have a bit indicating a specific
            UPDATE is from authoritative source, therefore overwrite all
            other Tunnel Attributes for the Prefix X to avoid recursive
            next hop issues and tunnel selection at the receiving
            Router? </span></p>
      </div>
    </blockquote>
    <br>
    This is not a good idea.  If you want to verify that a particular
    UPDATE is from an authoritative source, you need a lot more than can
    be conveyed in a single bit.<br>
    <br>
    <br>
    <blockquote type="cite"
cite="mid:4A95BA014132FF49AE685FAB4B9F17F66B0A7BA3@sjceml521-mbs.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><span
            style="color:#1F497D"><o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
            style="color:#1F497D"><span style="mso-list:Ignore">-<span
                style="font:7.0pt &quot;Times New Roman&quot;">       
              </span></span></span><!--[endif]--><span
            style="color:#1F497D">Have a bit indicating that a specific
            UPDATE only contain Tunnel attributes for the receiving
            Router, therefore can’t be forwarded?
          </span></p>
      </div>
    </blockquote>
    <br>
    Please compare draft-ietf-idr-segment-routing-te-policy, and its use
    of NO_ADVERTISE and Route Targets.<br>
    <br>
    <blockquote type="cite"
cite="mid:4A95BA014132FF49AE685FAB4B9F17F66B0A7BA3@sjceml521-mbs.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><span
            style="color:#1F497D"><o:p></o:p></span></p>
        <p class="MsoListParagraph"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">You said that
            SAFI 7 is deprecated because no one seemed interested in
            using it. We are very interested in using it because
            <o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
            style="color:#1F497D"><span style="mso-list:Ignore">-<span
                style="font:7.0pt &quot;Times New Roman&quot;">       
              </span></span></span><!--[endif]--><span
            style="color:#1F497D">it can be easily distinguished from
            normal  BGP UPDATE<o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
            style="color:#1F497D"><span style="mso-list:Ignore">-<span
                style="font:7.0pt &quot;Times New Roman&quot;">       
              </span></span></span><!--[endif]--><span
            style="color:#1F497D"> The receiving router doesn’t have to
            “Filter” the tunnel attributes before forwarding to others.
             <o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="text-indent:-.25in;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
            style="color:#1F497D"><span style="mso-list:Ignore">-<span
                style="font:7.0pt &quot;Times New Roman&quot;">       
              </span></span></span><!--[endif]--><span
            style="color:#1F497D">Can even be used for passing
            reconfigured IPsec keys to two ends of a tunnel.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Therefore we
            think SAFI 7 should be reserved.
          </span></p>
      </div>
    </blockquote>
    <br>
    It sounds like you need to write a draft proposing the specifics of
    how you would like to use BGP as part of your SD-WAN control.  The
    draft would then be free to propose a new SAFI, much as
    draft-ietf-idr-segment-routing-te-policy did.<br>
    <br>
    <br>
  </body>
</html>

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From: PVLR Pavana Murthy <pvlrpm@gmail.com>
Date: Tue, 10 Jul 2018 23:35:42 +0530
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Subject: [Idr] The Use of 'm' and 'not' bits in bitmask BGP Flowspec component(RFC 5575).
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--0000000000007d5e760570a8fa1c
Content-Type: text/plain; charset="UTF-8"

Hi,

The following is given in the RFC.

  0   1   2   3   4   5   6   7
+---+---+---+---+---+---+---+---+
| e | a |   len | 0 | 0 |not| m |
+---+---+---+---+---+---+---+---+

not - NOT bit. If set, logical negation of operation.

m - Match bit. If set, this is a bitwise match operation
defined as "(data & value) == value"; if unset, (data &
value) evaluates to TRUE if any of the bits in the value
mask are set in the data.


* Please let me know if the following my understanding is correct.*
I will try to use all the combinations of 'not' and 'm' bits.

I will try to use the mask with SYN, ACK bits of TCP header for this.
[CWR ECE URG ACK PSH RST SYN FIN]
mask = 0x12


   1. not-0, m-0  (data & mask) != 0 i.e. either SYN or ACK bits should
   have been set in TCP header.
   2. not-0, m-1  (data & mask)  == mask i.e. SYN and ACK bits both should
   be set in TCP header.
   3. not-1,m-0   (data & mask) == 0    i.e. both SYN and  ACK bits should
   not  be set in TCP header.
   4. not-1, m-1  (data & mask) != mask i.e. at least one of  SYN or ACK
   bits should not be set in TCP header.

Thanks,
Pavana.

--0000000000007d5e760570a8fa1c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi,<div>=C2=A0

<div style=3D"font-size:small;background-color:rgb(255,255,255);text-decora=
tion-style:initial;text-decoration-color:initial"><font face=3D"verdana, sa=
ns-serif">The following is given in the RFC</font>.=C2=A0</div><div style=
=3D"font-size:small;background-color:rgb(255,255,255);text-decoration-style=
:initial;text-decoration-color:initial"><br></div><div style=3D"font-size:s=
mall;background-color:rgb(255,255,255);text-decoration-style:initial;text-d=
ecoration-color:initial"><div><font face=3D"monospace, monospace">=C2=A0 0=
=C2=A0 =C2=A01=C2=A0 =C2=A02=C2=A0 =C2=A03=C2=A0 =C2=A04=C2=A0 =C2=A05=C2=
=A0 =C2=A06=C2=A0 =C2=A07</font></div><div><font face=3D"monospace, monospa=
ce">+---+---+---+---+---+---+---+-<wbr>--+</font></div><div><font face=3D"m=
onospace, monospace">| e | a |=C2=A0 =C2=A0len | 0 | 0 |not| m |</font></di=
v><div><font face=3D"monospace, monospace">+---+---+---+---+---+---+---+-<w=
br>--+</font></div><div><br></div><div><font face=3D"monospace, monospace">=
not - NOT<span>=C2=A0</span><span class=3D"gmail-il">bit</span>. If set, lo=
gical negation of operation.</font></div><div><font face=3D"monospace, mono=
space"><br></font></div><div><font face=3D"monospace, monospace">m - Match<=
span>=C2=A0</span><span class=3D"gmail-il">bit</span>. If set, this is a bi=
twise match operation</font></div><div><font face=3D"monospace, monospace">=
defined as &quot;(data &amp; value) =3D=3D value&quot;; if unset, (data &am=
p;</font></div><div><font face=3D"monospace, monospace">value) evaluates to=
 TRUE if any of the bits in the value</font></div><div><font face=3D"monosp=
ace, monospace"><span class=3D"gmail-il">mask</span><span>=C2=A0</span>are =
set in the data.</font></div><div><br></div></div><div style=3D"font-size:s=
mall;background-color:rgb(255,255,255);text-decoration-style:initial;text-d=
ecoration-color:initial"><font face=3D"verdana, sans-serif"><br></font></di=
v><div style=3D"font-size:small;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial"><font face=3D"verdana, =
sans-serif">

<b style=3D"font-size:small;background-color:rgb(255,255,255);text-decorati=
on-style:initial;text-decoration-color:initial"><span>=C2=A0</span>Please l=
et me know if the following my understanding is correct.</b><span style=3D"=
font-size:small;background-color:rgb(255,255,255);text-decoration-style:ini=
tial;text-decoration-color:initial;float:none;display:inline">=C2=A0</span>

<br></font></div><div style=3D"font-size:small;background-color:rgb(255,255=
,255);text-decoration-style:initial;text-decoration-color:initial"><font fa=
ce=3D"verdana, sans-serif">I will try to use all the combinations of &#39;n=
ot&#39; and &#39;m&#39; bits.</font></div><div style=3D"font-size:small;bac=
kground-color:rgb(255,255,255);text-decoration-style:initial;text-decoratio=
n-color:initial"><font face=3D"verdana, sans-serif"><br></font></div><div s=
tyle=3D"font-size:small;background-color:rgb(255,255,255);text-decoration-s=
tyle:initial;text-decoration-color:initial"><font face=3D"verdana, sans-ser=
if">I will try to use the<span>=C2=A0</span><span class=3D"gmail-il">mask</=
span><span>=C2=A0</span>with SYN, ACK bits of TCP header for this.</font></=
div><div style=3D"font-size:small;background-color:rgb(255,255,255);text-de=
coration-style:initial;text-decoration-color:initial"><font face=3D"verdana=
, sans-serif">[CWR ECE URG ACK PSH RST SYN FIN]<br></font></div><div style=
=3D"font-size:small;background-color:rgb(255,255,255);text-decoration-style=
:initial;text-decoration-color:initial"><font face=3D"verdana, sans-serif">=
<span class=3D"gmail-il">mask</span><span>=C2=A0</span>=3D 0x12</font></div=
><div style=3D"font-size:small;background-color:rgb(255,255,255);text-decor=
ation-style:initial;text-decoration-color:initial"><font face=3D"monospace,=
 monospace"><br></font></div><div style=3D"font-size:small;background-color=
:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initi=
al"><ol style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size=
:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:no=
rmal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px=
;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-st=
yle:initial;text-decoration-color:initial"><li style=3D"margin-left:15px"><=
font face=3D"verdana, sans-serif">not-0, m-0=C2=A0 (data &amp;<span>=C2=A0<=
/span><span class=3D"gmail-il">mask</span>) !=3D 0 i.e. either SYN or ACK b=
its should have been set in TCP header.</font></li><li style=3D"margin-left=
:15px"><font face=3D"verdana, sans-serif">not-0, m-1=C2=A0 (data &amp;<span=
>=C2=A0</span><span class=3D"gmail-il">mask</span>)=C2=A0 =3D=3D<span>=C2=
=A0</span><span class=3D"gmail-il">mask</span><span>=C2=A0</span>i.e. SYN a=
nd ACK bits both should be set in TCP header.</font></li><li style=3D"margi=
n-left:15px"><font face=3D"verdana, sans-serif">not-1,m-0=C2=A0 =C2=A0(data=
 &amp;<span>=C2=A0</span><span class=3D"gmail-il">mask</span>) =3D=3D 0=C2=
=A0 =C2=A0 i.e. both SYN and=C2=A0 ACK bits should not=C2=A0 be set in TCP =
header.</font></li><li style=3D"margin-left:15px"><font face=3D"verdana, sa=
ns-serif">not-1, m-1=C2=A0 (data &amp;<span>=C2=A0</span><span class=3D"gma=
il-il">mask</span>) !=3D<span>=C2=A0</span><span class=3D"gmail-il">mask</s=
pan><span>=C2=A0</span>i.e. at least one of=C2=A0 SYN or ACK bits should no=
t be set in TCP header.</font></li></ol>Thanks,</div><div style=3D"font-siz=
e:small;background-color:rgb(255,255,255);text-decoration-style:initial;tex=
t-decoration-color:initial">Pavana.</div></div></div>

--0000000000007d5e760570a8fa1c--


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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Eric C Rosen <erosen@juniper.net>, Jeff Tantsura <jefftant.ietf@gmail.com>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Date: Tue, 10 Jul 2018 19:56:21 +0000
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Eric C Rosen <erosen@juniper.net>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-tunnel-encaps@ietf.org" <draft-ietf-idr-tunnel-encaps@ietf.org>
Thread-Topic: Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Date: Tue, 10 Jul 2018 21:59:21 +0000
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Subject: Re: [Idr] Possible to set up priority for Tunnels established by draft-ietf-idr-tunnel-encaps-09 ?
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Eric,

We also believe what is proposed by draft-ietf-idr-segment-routing-te-polic=
y will be very useful for SD-WAN.
But:

-        The SAFI proposed in the draft is explicitly for SR

-        SD-WAN control will need more field than what is proposed by draft=
-ietf-idr-segment-routing-te-policy.

-        It might be convoluted  to expand the fields for SD-WAN purpose

Other comments/questions are inserted below:

Linda

From: Eric C Rosen [mailto:erosen@juniper.net]
Sent: Tuesday, July 10, 2018 10:00 AM
To: Linda Dunbar <linda.dunbar@huawei.com>; idr@ietf.org; draft-ietf-idr-tu=
nnel-encaps@ietf.org
Subject: Re: Possible to set up priority for Tunnels established by draft-i=
etf-idr-tunnel-encaps-09 ?

If you want a controller to use BGP to convey instructions for a particular=
 node, there is a draft that does something very similar: draft-ietf-idr-se=
gment-routing-te-policy.  That draft defines a new AFI/SAFI for conveying s=
egment routing te policies, and the policies are encoded as Tunnel Encapsul=
ation attributes.  That draft does require the use of the NO_ADVERTISE comm=
unity when an UPDATE is a command targeted to a single router.  The draft a=
lso allows the use of Route Targets to cover the case where a given  comman=
d is targeted to a set of routers, as well as the case where the targeted r=
outer is separated from the controller by a RR or ASBR.  While your applica=
tion is not about sr-te-policies, the way a controller would use BGP to pas=
s the commands to the targeted routers is similar; you should take a look.
On 7/9/2018 4:13 PM, Linda Dunbar wrote:
Eric,

draft-ietf-idr-tunnel-encaps-09 discussed ways to resolve conflicts of mult=
iple UPDATE messages with Tunnel Encap attributes.

Is it possible to have following capability?

-        Have a bit indicating a specific UPDATE is from authoritative sour=
ce, therefore overwrite all other Tunnel Attributes for the Prefix X to avo=
id recursive next hop issues and tunnel selection at the receiving Router?

This is not a good idea.  If you want to verify that a particular UPDATE is=
 from an authoritative source, you need a lot more than can be conveyed in =
a single bit.
[Linda] how many bits do you think are needed?



-        Have a bit indicating that a specific UPDATE only contain Tunnel a=
ttributes for the receiving Router, therefore can't be forwarded?

Please compare draft-ietf-idr-segment-routing-te-policy, and its use of NO_=
ADVERTISE and Route Targets.




You said that SAFI 7 is deprecated because no one seemed interested in usin=
g it. We are very interested in using it because

-        it can be easily distinguished from normal  BGP UPDATE

-         The receiving router doesn't have to "Filter" the tunnel attribut=
es before forwarding to others.

-        Can even be used for passing reconfigured IPsec keys to two ends o=
f a tunnel.

Therefore we think SAFI 7 should be reserved.

It sounds like you need to write a draft proposing the specifics of how you=
 would like to use BGP as part of your SD-WAN control.  The draft would the=
n be free to propose a new SAFI, much as draft-ietf-idr-segment-routing-te-=
policy did.

[Linda] Yes, we would like to. That is why we sent out so many questions.

Linda



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<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Eric, <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">We also believe what i=
s proposed by
</span>draft-ietf-idr-segment-routing-te-policy <span style=3D"color:#1F497=
D">will be very useful for SD-WAN.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">But:<o:p></o:p></span>=
</p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo3"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">The SAFI propo=
sed in the draft is explicitly for SR</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo3"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">SD-WAN control=
 will need more field than what is proposed by
</span>draft-ietf-idr-segment-routing-te-policy<span style=3D"color:#1F497D=
">. &nbsp;</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo3"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"m=
so-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">It might be co=
nvoluted &nbsp;to expand the fields for SD-WAN purpose</span><o:p></o:p></p=
>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"color:#1F=
497D">Other comments/questions are inserted below:
<o:p></o:p></span></a></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">Linda<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 #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> Eric C Rosen [mailto:erosen@juniper.net]
<br>
<b>Sent:</b> Tuesday, July 10, 2018 10:00 AM<br>
<b>To:</b> Linda Dunbar &lt;linda.dunbar@huawei.com&gt;; idr@ietf.org; draf=
t-ietf-idr-tunnel-encaps@ietf.org<br>
<b>Subject:</b> Re: Possible to set up priority for Tunnels established by =
draft-ietf-idr-tunnel-encaps-09 ?<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">If you want a control=
ler to use BGP to convey instructions for a particular node, there is a dra=
ft that does something very similar: draft-ietf-idr-segment-routing-te-poli=
cy.&nbsp; That draft defines a new AFI/SAFI
 for conveying segment routing te policies, and the policies are encoded as=
 Tunnel Encapsulation attributes.&nbsp; That draft does require the use of =
the NO_ADVERTISE community when an UPDATE is a command targeted to a single=
 router.&nbsp; The draft also allows the use
 of Route Targets to cover the case where a given&nbsp; command is targeted=
 to a set of routers, as well as the case where the targeted router is sepa=
rated from the controller by a RR or ASBR.&nbsp; While your application is =
not about sr-te-policies, the way a controller
 would use BGP to pass the commands to the targeted routers is similar; you=
 should take a look.<span style=3D"font-size:12.0pt"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal">On 7/9/2018 4:13 PM, Linda Dunbar wrote:<o:p></o:p><=
/p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Eric, </span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">draft-ietf-idr-tunnel-=
encaps-09 discussed ways to resolve conflicts of multiple UPDATE messages w=
ith Tunnel Encap attributes.
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Is it possible to have=
 following capability?
</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;
</span></span><![endif]><span style=3D"color:#1F497D">Have a bit indicating=
 a specific UPDATE is from authoritative source, therefore overwrite all ot=
her Tunnel Attributes for the Prefix X to avoid recursive next hop issues a=
nd tunnel selection at the receiving
 Router? </span><o:p></o:p></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><br>
This is not a good idea.&nbsp; If you want to verify that a particular UPDA=
TE is from an authoritative source, you need a lot more than can be conveye=
d in a single bit.<br>
</span><span style=3D"font-size:12.0pt;font-family:&quot;Times New Roman&qu=
ot;,serif;color:#1F497D">[Linda] how many bits do you think are needed?
</span><span style=3D"font-size:12.0pt;font-family:&quot;Times New Roman&qu=
ot;,serif"><br>
<br>
<br>
<o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;
</span></span><![endif]><span style=3D"color:#1F497D">Have a bit indicating=
 that a specific UPDATE only contain Tunnel attributes for the receiving Ro=
uter, therefore can&#8217;t be forwarded?
</span><o:p></o:p></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif"><br>
Please compare draft-ietf-idr-segment-routing-te-policy, and its use of NO_=
ADVERTISE and Route Targets.<br>
<br>
<br>
<o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoListParagraph"><span style=3D"color:#1F497D">&nbsp;</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">You said that SAFI 7 i=
s deprecated because no one seemed interested in using it. We are very inte=
rested in using it because
</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;
</span></span><![endif]><span style=3D"color:#1F497D">it can be easily dist=
inguished from normal &nbsp;BGP UPDATE</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;
</span></span><![endif]><span style=3D"color:#1F497D">&nbsp;The receiving r=
outer doesn&#8217;t have to &#8220;Filter&#8221; the tunnel attributes befo=
re forwarding to others. &nbsp;</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">-<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;
</span></span><![endif]><span style=3D"color:#1F497D">Can even be used for =
passing reconfigured IPsec keys to two ends of a tunnel.
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Therefore we think SAF=
I 7 should be reserved.
</span><o:p></o:p></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Times New Roman&quot;,serif"><br>
It sounds like you need to write a draft proposing the specifics of how you=
 would like to use BGP as part of your SD-WAN control.&nbsp; The draft woul=
d then be free to propose a new SAFI, much as draft-ietf-idr-segment-routin=
g-te-policy did.</span><span style=3D"font-size:12.0pt;font-family:&quot;Ti=
mes New Roman&quot;,serif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
#1F497D">[Linda] Yes, we would like to. That is why we sent out so many que=
stions. &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
#1F497D">Linda<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Times New Roman&quot;,serif"><br>
<br>
<o:p></o:p></span></p>
</div>
</body>
</html>

--_000_4A95BA014132FF49AE685FAB4B9F17F66B0AE83Dsjceml521mbschi_--


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From nobody Tue Jul 10 20:31:53 2018
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Date: Tue, 10 Jul 2018 23:31:39 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: Susan Hares <shares@ndzh.com>
Cc: idr@ietf.org, draft-xu-idr-neighbor-autodiscovery@ietf.org
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Sue,

On Mon, Jul 02, 2018 at 01:08:47PM -0400, Susan Hares wrote:
> This begins a 2 week WG adoption call for
> draft-xu-idr-neighbor-autodiscovery (July 2 â€“ July 16).  

I'm supportive of IDR working on BGP auto-discovery.  This document may be a
good place to do it.

Mostly I make this comment because:


> 3)      If so, should be passed in BGP Hello message?  
> 
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc). 

draft-acee-idr-lldp-peer-discovery covers a bit of this space.  (Xiaohu is
also a co-author on that document.)  The documents overlap strongly on core
features, and could use general reconciliation across their feature sets.

Speaking with my BFD co-chair hat on, BFD is likely not a good place for
this. :-)

-- Jeff

P.S. I suspect Yakov would be a bit amused that LDP hello reared its head in
a useful way in BGP.  Part of BGP-4 would have been avoided if it'd been
around.


From nobody Tue Jul 10 23:26:32 2018
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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Hi Sue,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I support the adoption as a contributor, and I=A1=AF=
m not aware of any IPR.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; Yes, it can be used to simplified the complicated configur=
ation of BGP.<o:p></o:p></p>
<p class=3D"MsoNormal">2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; Yes, it works for other deployments such as metro area net=
works.<o:p></o:p></p>
<p class=3D"MsoNormal">3)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; BGP Hello message is like an LDP Hello message, which has =
been proven to work very well.<o:p></o:p></p>
<p class=3D"MsoNormal">4)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; Yes, it can be used by LSVR WG. <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best Regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Shunwan<span style=3D"color:#1F497D"><o:p></o:p></sp=
an></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 #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"ZH-CN" style=3D"font-family:&quot;=
=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif">=B7=A2=BC=FE=C8=CB</span></b><b>=
<span style=3D"font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif"=
>:</span></b><span style=3D"font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot=
;,sans-serif"> Idr [mailto:idr-bounces@ietf.org]
<b><span lang=3D"ZH-CN">=B4=FA=B1=ED </span></b>Susan Hares<br>
<b><span lang=3D"ZH-CN">=B7=A2=CB=CD=CA=B1=BC=E4</span>:</b> 2018<span lang=
=3D"ZH-CN">=C4=EA</span>7<span lang=3D"ZH-CN">=D4=C2</span>3<span lang=3D"Z=
H-CN">=C8=D5</span> 1:09<br>
<b><span lang=3D"ZH-CN">=CA=D5=BC=FE=C8=CB</span>:</b> idr@ietf.org<br>
<b><span lang=3D"ZH-CN">=B3=AD=CB=CD</span>:</b> draft-xu-idr-neighbor-auto=
discovery@ietf.org<br>
<b><span lang=3D"ZH-CN">=D6=F7=CC=E2</span>:</b> [Idr] WG adoption call for=
 draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Greetings: <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This begins a 2 week WG adoption call for draft-xu-i=
dr-neighbor-autodiscovery (July 2 =A8C July 16).&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/doc/draft-xu=
-idr-neighbor-autodiscovery/">https://datatracker.ietf.org/doc/draft-xu-idr=
-neighbor-autodiscovery/</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The authors of this draft should send their IPR stat=
ements in response to this email. &nbsp;I hope the authors will ihelp their=
 vacationing co-authors to respond by July 7<sup>th</sup>.&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The WG should consider the following: <o:p></o:p></p=
>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">1)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does BGP need to have an autodiscovery mechanism fo=
r peers within Data Centers?
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">2)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does this mechanism work for other deployments? <o:=
p></o:p></p>
<p class=3D"MsoListParagraph"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">3)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>If so, should be passed in BGP Hello message?&nbsp;=
 <o:p></o:p></p>
<p class=3D"MsoListParagraph">Or should it be a part of another protocol (e=
.g. LLDP, BFD, etc).
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">4)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does this interact with any of the LSVR work? <o:p>=
</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I want to thank the authors for their patience while=
 we sorted through some of the WG LC for other drafts.&nbsp; We decided to =
wait until some of those discussion were cleared up prior to starting a new=
 WG Adoption call.<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">Susan Hares <o:p></o:p></p>
</div>
</body>
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--_000_19AB2A007F56DB4E8257F949A2FB9858DC3B8B4CNKGEML515MBXchi_--


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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/zg5aWvC5j_SEhiNDfzMkFWOiHec>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hi Sue,

Support.

1) Yes
2) Yes, BGP is most commonly used in most DCs. However, it may have applicat=
ions beyond that.
3) yes, in order to simplify operations for DCs. Single CP is needed.
4) it should be reviewed by LSVR WG.

Gaurav

> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
> Greetings:
>=20
> =20
>=20
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscov=
ery (July 2 =E2=80=93 July 16).=20
>=20
> =20
>=20
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>=20
> =20
>=20
> The authors of this draft should send their IPR statements in response to t=
his email.  I hope the authors will ihelp their vacationing co-authors to re=
spond by July 7th.=20
>=20
> =20
>=20
> The WG should consider the following:
>=20
> 1)      Does BGP need to have an autodiscovery mechanism for peers within D=
ata Centers?
>=20
> 2)      Does this mechanism work for other deployments?
>=20
> =20
>=20
> 3)      If so, should be passed in BGP Hello message?=20
>=20
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>=20
> =20
>=20
> 4)      Does this interact with any of the LSVR work?
>=20
> =20
>=20
> I want to thank the authors for their patience while we sorted through som=
e of the WG LC for other drafts.  We decided to wait until some of those dis=
cussion were cleared up prior to starting a new WG Adoption call.
>=20
> =20
>=20
> =20
>=20
> Susan Hares
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div><span></span></div><div><div dir=3D"lt=
r">Hi Sue,<div><br></div><div>Support.</div><div><br></div><div>1) Yes</div>=
<div>2) Yes, BGP is most commonly used in most DCs. However, it may have app=
lications beyond that.</div><div>3) yes, in order to simplify operations for=
 DCs. Single CP is needed.</div><div>4) it should be reviewed by LSVR WG.</d=
iv><div><br></div><div>Gaurav</div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <span dir=3D"l=
tr">&lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-US" l=
ink=3D"blue" vlink=3D"purple"><div class=3D"m_5148942973323166637WordSection=
1"><p class=3D"MsoNormal">Greetings: <u></u><u></u></p><p class=3D"MsoNormal=
"><u></u>&nbsp;<u></u></p><p class=3D"MsoNormal">This begins a 2 week WG ado=
ption call for draft-xu-idr-neighbor-<wbr>autodiscovery (July 2 =E2=80=93 Ju=
ly 16).&nbsp; <u></u><u></u></p><p class=3D"MsoNormal"><u></u>&nbsp;<u></u><=
/p><p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/doc/draft-=
xu-idr-neighbor-autodiscovery/" target=3D"_blank">https://datatracker.ietf.o=
rg/<wbr>doc/draft-xu-idr-neighbor-<wbr>autodiscovery/</a><u></u><u></u></p><=
p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p><p class=3D"MsoNormal">The aut=
hors of this draft should send their IPR statements in response to this emai=
l.&nbsp; I hope the authors will ihelp their vacationing co-authors to respo=
nd by July 7<sup>th</sup>.&nbsp; <u></u><u></u></p><p class=3D"MsoNormal"><u=
></u>&nbsp;<u></u></p><p class=3D"MsoNormal">The WG should consider the foll=
owing: <u></u><u></u></p><p class=3D"m_5148942973323166637MsoListParagraph">=
<u></u><span>1)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; </span></span><u></u><span dir=3D"LTR"></span>Does B=
GP need to have an autodiscovery mechanism for peers within Data Centers? <u=
></u><u></u></p><p class=3D"m_5148942973323166637MsoListParagraph"><u></u><s=
pan>2)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp; </span></span><u></u><span dir=3D"LTR"></span>Does this mech=
anism work for other deployments? <u></u><u></u></p><p class=3D"m_5148942973=
323166637MsoListParagraph"><u></u>&nbsp;<u></u></p><p class=3D"m_51489429733=
23166637MsoListParagraph"><u></u><span>3)<span style=3D"font:7.0pt &quot;Tim=
es New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><u></u><spa=
n dir=3D"LTR"></span>If so, should be passed in BGP Hello message?&nbsp; <u>=
</u><u></u></p><p class=3D"m_5148942973323166637MsoListParagraph">Or should i=
t be a part of another protocol (e.g. LLDP, BFD, etc). <u></u><u></u></p><p c=
lass=3D"MsoNormal"><u></u>&nbsp;<u></u></p><p class=3D"m_5148942973323166637=
MsoListParagraph"><u></u><span>4)<span style=3D"font:7.0pt &quot;Times New R=
oman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><u></u><span dir=3D=
"LTR"></span>Does this interact with any of the LSVR work? <u></u><u></u></p=
><p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p><p class=3D"MsoNormal">I wan=
t to thank the authors for their patience while we sorted through some of th=
e WG LC for other drafts.&nbsp; We decided to wait until some of those discu=
ssion were cleared up prior to starting a new WG Adoption call.<span class=3D=
"HOEnZb"><font color=3D"#888888"><u></u><u></u></font></span></p><span class=
=3D"HOEnZb"><font color=3D"#888888"><p class=3D"MsoNormal"><u></u>&nbsp;<u><=
/u></p><p class=3D"MsoNormal"><u></u>&nbsp;<u></u></p><p class=3D"MsoNormal"=
>Susan Hares <u></u><u></u></p></font></span></div></div><br>_______________=
_______________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" tar=
get=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div></div>
</div></body></html>=

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From: Linda Dunbar <linda.dunbar@huawei.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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<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></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Linda<o:p></o:p></span=
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<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
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icrosoft YaHei&quot;,sans-serif">=B7=A2=BC=FE=C8=CB</span></b><b><span styl=
e=3D"font-family:&quot;Microsoft YaHei&quot;,sans-serif">:</span></b><span =
style=3D"font-family:&quot;Microsoft YaHei&quot;,sans-serif"> Idr [<a href=
=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b><span lang=3D"ZH-CN">=B4=FA=B1=ED </span></b>Susan Hares<br>
<b><span lang=3D"ZH-CN">=B7=A2=CB=CD=CA=B1=BC=E4</span>:</b> 2018<span lang=
=3D"ZH-CN">=C4=EA</span>7<span lang=3D"ZH-CN">=D4=C2</span>3<span lang=3D"Z=
H-CN">=C8=D5</span> 1:09<br>
<b><span lang=3D"ZH-CN">=CA=D5=BC=FE=C8=CB</span>:</b> <a href=3D"mailto:id=
r@ietf.org">idr@ietf.org</a><br>
<b><span lang=3D"ZH-CN">=B3=AD=CB=CD</span>:</b> <a href=3D"mailto:draft-xu=
-idr-neighbor-autodiscovery@ietf.org">
draft-xu-idr-neighbor-autodiscovery@ietf.org</a><br>
<b><span lang=3D"ZH-CN">=D6=F7=CC=E2</span>:</b> [Idr] WG adoption call for=
 draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Greetings: <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This begins a 2 week WG adoption call for draft-xu-i=
dr-neighbor-autodiscovery (July 2 =A8C July 16).&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/doc/draft-xu=
-idr-neighbor-autodiscovery/">https://datatracker.ietf.org/doc/draft-xu-idr=
-neighbor-autodiscovery/</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The authors of this draft should send their IPR stat=
ements in response to this email. &nbsp;I hope the authors will ihelp their=
 vacationing co-authors to respond by July 7<sup>th</sup>.&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The WG should consider the following: <o:p></o:p></p=
>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">1)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does BGP need to have an autodiscovery mechanism fo=
r peers within Data Centers?
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">2)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does this mechanism work for other deployments? <o:=
p></o:p></p>
<p class=3D"MsoListParagraph"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">3)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>If so, should be passed in BGP Hello message?&nbsp;=
 <o:p></o:p></p>
<p class=3D"MsoListParagraph">Or should it be a part of another protocol (e=
..g. LLDP, BFD, etc).
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">4)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Does this interact with any of the LSVR work? <o:p>=
</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I want to thank the authors for their patience while=
 we sorted through some of the WG LC for other drafts.&nbsp; We decided to =
wait until some of those discussion were cleared up prior to starting a new=
 WG Adoption call.<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">Susan Hares <o:p></o:p></p>
</div>
</body>
</html>

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From: Nikos Triantafillis <ntriantafillis@gmail.com>
Date: Thu, 12 Jul 2018 00:24:17 +0300
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To: Susan Hares <shares@ndzh.com>
Cc: idr wg <idr@ietf.org>, draft-xu-idr-neighbor-autodiscovery@ietf.org
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Support.

Nikos.-

On Wed, Jul 11, 2018 at 8:39 PM, Gaurav Dawra <gdawra.ietf@gmail.com> wrote=
:

> Hi Sue,
>
> Support.
>
> 1) Yes
> 2) Yes, BGP is most commonly used in most DCs. However, it may have
> applications beyond that.
> 3) yes, in order to simplify operations for DCs. Single CP is needed.
> 4) it should be reviewed by LSVR WG.
>
> Gaurav
>
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
>
>> Greetings:
>>
>>
>>
>> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisc=
overy
>> (July 2 =E2=80=93 July 16).
>>
>>
>>
>> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>>
>>
>>
>> The authors of this draft should send their IPR statements in response t=
o
>> this email.  I hope the authors will ihelp their vacationing co-authors =
to
>> respond by July 7th.
>>
>>
>>
>> The WG should consider the following:
>>
>> 1)      Does BGP need to have an autodiscovery mechanism for peers
>> within Data Centers?
>>
>> 2)      Does this mechanism work for other deployments?
>>
>>
>>
>> 3)      If so, should be passed in BGP Hello message?
>>
>> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>>
>>
>>
>> 4)      Does this interact with any of the LSVR work?
>>
>>
>>
>> I want to thank the authors for their patience while we sorted through
>> some of the WG LC for other drafts.  We decided to wait until some of th=
ose
>> discussion were cleared up prior to starting a new WG Adoption call.
>>
>>
>>
>>
>>
>> Susan Hares
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--0000000000008412a50570bfde47
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<div dir=3D"ltr"><div>Support.</div><div><br></div><div>Nikos.-<br></div></=
div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, Jul 1=
1, 2018 at 8:39 PM, Gaurav Dawra <span dir=3D"ltr">&lt;<a href=3D"mailto:gd=
awra.ietf@gmail.com" target=3D"_blank">gdawra.ietf@gmail.com</a>&gt;</span>=
 wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto"><div><span></sp=
an></div><div><div dir=3D"ltr">Hi Sue,<div><br></div><div>Support.</div><di=
v><br></div><div>1) Yes</div><div>2) Yes, BGP is most commonly used in most=
 DCs. However, it may have applications beyond that.</div><div>3) yes, in o=
rder to simplify operations for DCs. Single CP is needed.</div><div>4) it s=
hould be reviewed by LSVR WG.</div><div><br></div><div>Gaurav</div><div cla=
ss=3D"gmail_extra"><br><div class=3D"gmail_quote"><span class=3D"">On Mon, =
Jul 2, 2018 at 10:08 AM, Susan Hares <span dir=3D"ltr">&lt;<a href=3D"mailt=
o:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt;</span> wrote:<=
br></span><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex"><div link=3D"blue" vlink=3D"purple=
" lang=3D"EN-US"><div class=3D"m_8544498380217786516m_5148942973323166637Wo=
rdSection1"><span class=3D""><p class=3D"MsoNormal">Greetings: <u></u><u></=
u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"=
>This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisc<w=
br>overy (July 2 =E2=80=93 July 16).=C2=A0 <u></u><u></u></p><p class=3D"Ms=
oNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><a href=3D"https://=
datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/" target=3D"_b=
lank">https://datatracker.ietf.org/d<wbr>oc/draft-xu-idr-neighbor-autod<wbr=
>iscovery/</a><u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u>=
</p><p class=3D"MsoNormal">The authors of this draft should send their IPR =
statements in response to this email.=C2=A0 I hope the authors will ihelp t=
heir vacationing co-authors to respond by July 7<sup>th</sup>.=C2=A0 <u></u=
><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoN=
ormal">The WG should consider the following: <u></u><u></u></p><p class=3D"=
m_8544498380217786516m_5148942973323166637MsoListParagraph"><u></u><span>1)=
<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"></span>Does BGP need to=
 have an autodiscovery mechanism for peers within Data Centers? <u></u><u><=
/u></p><p class=3D"m_8544498380217786516m_5148942973323166637MsoListParagra=
ph"><u></u><span>2)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"></spa=
n>Does this mechanism work for other deployments? <u></u><u></u></p><p clas=
s=3D"m_8544498380217786516m_5148942973323166637MsoListParagraph"><u></u>=C2=
=A0<u></u></p><p class=3D"m_8544498380217786516m_5148942973323166637MsoList=
Paragraph"><u></u><span>3)<span style=3D"font:7.0pt &quot;Times New Roman&q=
uot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"=
></span>If so, should be passed in BGP Hello message?=C2=A0 <u></u><u></u><=
/p></span><p class=3D"m_8544498380217786516m_5148942973323166637MsoListPara=
graph">Or should it be a part of another protocol (e.g. LLDP, BFD, etc). <u=
></u><u></u></p><span class=3D""><p class=3D"MsoNormal"><u></u>=C2=A0<u></u=
></p><p class=3D"m_8544498380217786516m_5148942973323166637MsoListParagraph=
"><u></u><span>4)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"></span>D=
oes this interact with any of the LSVR work? <u></u><u></u></p><p class=3D"=
MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">I want to thank t=
he authors for their patience while we sorted through some of the WG LC for=
 other drafts.=C2=A0 We decided to wait until some of those discussion were=
 cleared up prior to starting a new WG Adoption call.<span class=3D"m_85444=
98380217786516HOEnZb"><font color=3D"#888888"><u></u><u></u></font></span><=
/p><span class=3D"m_8544498380217786516HOEnZb"><font color=3D"#888888"><p c=
lass=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p><p class=3D"MsoNormal">Susan Hares <u></u><u></u></p></fon=
t></span></span></div></div><br><span class=3D"">__________________________=
____<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></span></blockquote></div><br></div></div>
</div></div><br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--0000000000008412a50570bfde47--


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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: =?utf-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= <xiaohu.xxh@alibaba-inc.com>, "Susan Hares" <shares@ndzh.com>, idr <idr@ietf.org>
CC: draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "aretana.ietf" <aretana.ietf@gmail.com>, John Scudder <jgs@juniper.net>
Thread-Topic: WG adoption call for draft-xu-idr-neighbor-autodiscovery
Thread-Index: AdQSJcQmPylai0FFTx6TtuTV7fzVrQGuD1+AACmX65A=
Date: Thu, 12 Jul 2018 02:02:53 +0000
Message-ID: <e918a522bbbe4598be0c0e56252ff3fb@XCH-ALN-008.cisco.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Thu, 12 Jul 2018 02:08:08 +0000
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
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From: ShaoWen Ma <mashaowen@gmail.com>
Date: Thu, 12 Jul 2018 13:41:14 +0800
Message-ID: <CAAcA-dv3XH1booLf6bz6-z5U2dmH=AHMbE1mm=PTQQvFNrBRZw@mail.gmail.com>
To: Susan Hares <shares@ndzh.com>
Cc: idr@ietf.org, draft-xu-idr-neighbor-autodiscovery@ietf.org
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Support

Best Regards
Shaowen Ma

On Tue, Jul 3, 2018 at 1:08 AM, Susan Hares <shares@ndzh.com> wrote:

> Greetings:
>
>
>
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisco=
very
> (July 2 =E2=80=93 July 16).
>
>
>
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>
>
>
> The authors of this draft should send their IPR statements in response to
> this email.  I hope the authors will ihelp their vacationing co-authors t=
o
> respond by July 7th.
>
>
>
> The WG should consider the following:
>
> 1)      Does BGP need to have an autodiscovery mechanism for peers within
> Data Centers?
>
> 2)      Does this mechanism work for other deployments?
>
>
>
> 3)      If so, should be passed in BGP Hello message?
>
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>
>
>
> 4)      Does this interact with any of the LSVR work?
>
>
>
> I want to thank the authors for their patience while we sorted through
> some of the WG LC for other drafts.  We decided to wait until some of tho=
se
> discussion were cleared up prior to starting a new WG Adoption call.
>
>
>
>
>
> Susan Hares
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--000000000000ca1bcc0570c6cf0d
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<div dir=3D"ltr"><div><span style=3D"font-family:trebuchet ms,sans-serif">S=
upport</span></div><div><span style=3D"font-family:trebuchet ms,sans-serif"=
><br></span></div><div><span style=3D"font-family:trebuchet ms,sans-serif">=
Best Regards</span></div><div><span style=3D"font-family:trebuchet ms,sans-=
serif">Shaowen Ma</span><br></div></div><div class=3D"gmail_extra"><br><div=
 class=3D"gmail_quote">On Tue, Jul 3, 2018 at 1:08 AM, Susan Hares <span di=
r=3D"ltr">&lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@n=
dzh.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link=
=3D"blue" vlink=3D"purple" lang=3D"EN-US"><div class=3D"m_85149442142700973=
87WordSection1"><p class=3D"MsoNormal">Greetings: <u></u><u></u></p><p clas=
s=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">This begins =
a 2 week WG adoption call for draft-xu-idr-neighbor-<wbr>autodiscovery (Jul=
y 2 =E2=80=93 July 16).=C2=A0 <u></u><u></u></p><p class=3D"MsoNormal"><u><=
/u>=C2=A0<u></u></p><p class=3D"MsoNormal"><a href=3D"https://datatracker.i=
etf.org/doc/draft-xu-idr-neighbor-autodiscovery/" target=3D"_blank">https:/=
/datatracker.ietf.org/<wbr>doc/draft-xu-idr-neighbor-<wbr>autodiscovery/</a=
><u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=
=3D"MsoNormal">The authors of this draft should send their IPR statements i=
n response to this email.=C2=A0 I hope the authors will ihelp their vacatio=
ning co-authors to respond by July 7<sup>th</sup>.=C2=A0 <u></u><u></u></p>=
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">The W=
G should consider the following: <u></u><u></u></p><p class=3D"m_8514944214=
270097387MsoListParagraph"><u></u><span>1)<span style=3D"font:7.0pt &quot;T=
imes New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><=
span dir=3D"LTR"></span>Does BGP need to have an autodiscovery mechanism fo=
r peers within Data Centers? <u></u><u></u></p><p class=3D"m_85149442142700=
97387MsoListParagraph"><u></u><span>2)<span style=3D"font:7.0pt &quot;Times=
 New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span=
 dir=3D"LTR"></span>Does this mechanism work for other deployments? <u></u>=
<u></u></p><p class=3D"m_8514944214270097387MsoListParagraph"><u></u>=C2=A0=
<u></u></p><p class=3D"m_8514944214270097387MsoListParagraph"><u></u><span>=
3)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"></span>If so, should be=
 passed in BGP Hello message?=C2=A0 <u></u><u></u></p><p class=3D"m_8514944=
214270097387MsoListParagraph">Or should it be a part of another protocol (e=
.g. LLDP, BFD, etc). <u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0=
<u></u></p><p class=3D"m_8514944214270097387MsoListParagraph"><u></u><span>=
4)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"></span>Does this intera=
ct with any of the LSVR work? <u></u><u></u></p><p class=3D"MsoNormal"><u><=
/u>=C2=A0<u></u></p><p class=3D"MsoNormal">I want to thank the authors for =
their patience while we sorted through some of the WG LC for other drafts.=
=C2=A0 We decided to wait until some of those discussion were cleared up pr=
ior to starting a new WG Adoption call.<span class=3D"HOEnZb"><font color=
=3D"#888888"><u></u><u></u></font></span></p><span class=3D"HOEnZb"><font c=
olor=3D"#888888"><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D=
"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Susan Hares <u><=
/u><u></u></p></font></span></div></div><br>______________________________<=
wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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Cc: Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>, draft-xu-idr-neighbor-autodiscovery@ietf.org, lsvr-chairs@ietf.org
To: Gaurav Dawra <gdawra.ietf@gmail.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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LSVR realises that there is need for a neighbour and liveliness =
detection mechanism, and is making effort to understand the particular =
LSVR requirements for a solution.=20

=46rom a very high level perspective, there are few ways to address the =
aspect of LSVR peer discovery and liveliness detection:
1) Create something new
2) Extend something existing
3) Re-use something existing

LSVR has no technology religion about any of these, and would like to =
progress with a solution space that most=20
optimal answers the particular LSVR requirements.=20

Within LSVR WG meeting at IETF102, there is time reserved to discuss =
about these matters, and if you feel interested, we could add this draft =
into the agenda?

Brgds,
G/





> On 11 Jul 2018, at 19:39, Gaurav Dawra <gdawra.ietf@gmail.com> wrote:
>=20
> Hi Sue,
>=20
> Support.
>=20
> 1) Yes
> 2) Yes, BGP is most commonly used in most DCs. However, it may have =
applications beyond that.
> 3) yes, in order to simplify operations for DCs. Single CP is needed.
> 4) it should be reviewed by LSVR WG.
>=20
> Gaurav
>=20
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com =
<mailto:shares@ndzh.com>> wrote:
> Greetings:
>=20
> =20
>=20
> This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16).=20
>=20
> =20
>=20
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/ =
<https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/>
> =20
>=20
> The authors of this draft should send their IPR statements in response =
to this email.  I hope the authors will ihelp their vacationing =
co-authors to respond by July 7th.=20
>=20
> =20
>=20
> The WG should consider the following:
>=20
> 1)      Does BGP need to have an autodiscovery mechanism for peers =
within Data Centers?
>=20
> 2)      Does this mechanism work for other deployments?
>=20
> =20
>=20
> 3)      If so, should be passed in BGP Hello message?=20
>=20
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>=20
> =20
>=20
> 4)      Does this interact with any of the LSVR work?
>=20
> =20
>=20
> I want to thank the authors for their patience while we sorted through =
some of the WG LC for other drafts.  We decided to wait until some of =
those discussion were cleared up prior to starting a new WG Adoption =
call.
>=20
> =20
>=20
> =20
>=20
> Susan Hares
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org <mailto:Idr@ietf.org>
> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


--Apple-Mail=_0520A9EB-868B-4245-B2B4-A64CBEEF1949
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">LSVR =
realises that there is need for a neighbour and liveliness detection =
mechanism, and is making effort to understand the particular LSVR =
requirements for a solution.&nbsp;<div class=3D""><br =
class=3D""></div><div class=3D"">=46rom a very high level perspective, =
there are few ways to address the aspect of LSVR peer discovery and =
liveliness detection:</div><div class=3D"">1) Create something =
new</div><div class=3D"">2) Extend something existing</div><div =
class=3D"">3) Re-use something existing</div><div class=3D""><br =
class=3D""><div>LSVR has no technology religion about any of these, and =
would like to progress with a solution space that =
most&nbsp;</div><div>optimal answers the particular LSVR =
requirements.&nbsp;</div><div><br class=3D""></div><div>Within LSVR WG =
meeting at IETF102, there is time reserved to discuss about these =
matters, and if you feel interested, we could add this draft into the =
agenda?</div><div><br =
class=3D""></div><div>Brgds,</div><div>G/</div><div><br =
class=3D""></div><div><br class=3D""></div><div><br =
class=3D""></div><div><br class=3D""></div><div><br class=3D""><blockquote=
 type=3D"cite" class=3D""><div class=3D"">On 11 Jul 2018, at 19:39, =
Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf@gmail.com" =
class=3D"">gdawra.ietf@gmail.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"content-type" content=3D"text/html; charset=3Dutf-8" =
class=3D""><div dir=3D"auto" class=3D""><div class=3D""><span =
class=3D""></span></div><div class=3D""><div dir=3D"ltr" class=3D"">Hi =
Sue,<div class=3D""><br class=3D""></div><div =
class=3D"">Support.</div><div class=3D""><br class=3D""></div><div =
class=3D"">1) Yes</div><div class=3D"">2) Yes, BGP is most commonly used =
in most DCs. However, it may have applications beyond that.</div><div =
class=3D"">3) yes, in order to simplify operations for DCs. Single CP is =
needed.</div><div class=3D"">4) it should be reviewed by LSVR =
WG.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Gaurav</div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <span =
dir=3D"ltr" class=3D"">&lt;<a href=3D"mailto:shares@ndzh.com" =
target=3D"_blank" class=3D"">shares@ndzh.com</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-US" =
link=3D"blue" vlink=3D"purple" class=3D""><div =
class=3D"m_5148942973323166637WordSection1"><p =
class=3D"MsoNormal">Greetings: <u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u class=3D""></u></p><p =
class=3D"MsoNormal">This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-<wbr class=3D"">autodiscovery (July 2 =E2=80=93 =
July 16).&nbsp; <u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u class=3D""></u></p><p =
class=3D"MsoNormal"><a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscove=
ry/" target=3D"_blank" class=3D"">https://datatracker.ietf.org/<wbr =
class=3D"">doc/draft-xu-idr-neighbor-<wbr class=3D"">autodiscovery/</a><u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><u =
class=3D""></u>&nbsp;<u class=3D""></u></p><p class=3D"MsoNormal">The =
authors of this draft should send their IPR statements in response to =
this email.&nbsp; I hope the authors will ihelp their vacationing =
co-authors to respond by July 7<sup class=3D"">th</sup>.&nbsp; <u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><u =
class=3D""></u>&nbsp;<u class=3D""></u></p><p class=3D"MsoNormal">The WG =
should consider the following: <u class=3D""></u><u class=3D""></u></p><p =
class=3D"m_5148942973323166637MsoListParagraph"><u class=3D""></u><span =
class=3D"">1)<span style=3D"font:7.0pt &quot;Times New Roman&quot;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><u =
class=3D""></u><span dir=3D"LTR" class=3D""></span>Does BGP need to have =
an autodiscovery mechanism for peers within Data Centers? <u =
class=3D""></u><u class=3D""></u></p><p =
class=3D"m_5148942973323166637MsoListParagraph"><u class=3D""></u><span =
class=3D"">2)<span style=3D"font:7.0pt &quot;Times New Roman&quot;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><u =
class=3D""></u><span dir=3D"LTR" class=3D""></span>Does this mechanism =
work for other deployments? <u class=3D""></u><u class=3D""></u></p><p =
class=3D"m_5148942973323166637MsoListParagraph"><u class=3D""></u>&nbsp;<u=
 class=3D""></u></p><p class=3D"m_5148942973323166637MsoListParagraph"><u =
class=3D""></u><span class=3D"">3)<span style=3D"font:7.0pt &quot;Times =
New Roman&quot;" class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><u class=3D""></u><span dir=3D"LTR" class=3D""></span>If =
so, should be passed in BGP Hello message?&nbsp; <u class=3D""></u><u =
class=3D""></u></p><p class=3D"m_5148942973323166637MsoListParagraph">Or =
should it be a part of another protocol (e.g. LLDP, BFD, etc). <u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><u =
class=3D""></u>&nbsp;<u class=3D""></u></p><p =
class=3D"m_5148942973323166637MsoListParagraph"><u class=3D""></u><span =
class=3D"">4)<span style=3D"font:7.0pt &quot;Times New Roman&quot;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><u =
class=3D""></u><span dir=3D"LTR" class=3D""></span>Does this interact =
with any of the LSVR work? <u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u class=3D""></u></p><p =
class=3D"MsoNormal">I want to thank the authors for their patience while =
we sorted through some of the WG LC for other drafts.&nbsp; We decided =
to wait until some of those discussion were cleared up prior to starting =
a new WG Adoption call.<span class=3D"HOEnZb"><font color=3D"#888888" =
class=3D""><u class=3D""></u><u class=3D""></u></font></span></p><span =
class=3D"HOEnZb"><font color=3D"#888888" class=3D""><p =
class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u class=3D""></u></p><p =
class=3D"MsoNormal"><u class=3D""></u>&nbsp;<u class=3D""></u></p><p =
class=3D"MsoNormal">Susan Hares <u class=3D""></u><u =
class=3D""></u></p></font></span></div></div><br =
class=3D"">______________________________<wbr =
class=3D"">_________________<br class=3D"">
Idr mailing list<br class=3D"">
<a href=3D"mailto:Idr@ietf.org" class=3D"">Idr@ietf.org</a><br class=3D"">=

<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" =
target=3D"_blank" class=3D"">https://www.ietf.org/mailman/<wbr =
class=3D"">listinfo/idr</a><br class=3D"">
<br class=3D""></blockquote></div><br class=3D""></div></div>
</div></div>_______________________________________________<br =
class=3D"">Idr mailing list<br class=3D""><a href=3D"mailto:Idr@ietf.org" =
class=3D"">Idr@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/idr<br =
class=3D""></div></blockquote></div><br class=3D""></div></body></html>=

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From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 12 Jul 2018 10:51:51 +0200
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Subject: Re: [Idr] draft-xu-idr-neighbor-autodiscovery-08
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Hi Ketan,

Ad 1 - You missed the point of the issue. The point was that you are *not*
doing any discovery - at most automating some aspects of BGP provisioning
for MSDCs. The other draft was just the example what is auto discovery ie.
you don't apriori know the other side. Here due to amount of policy
required to scope BGP Hellos per interface you surely do.

Ad 2 - If draft does not propose any such aspects please remove TLVs which
are there for LSVR.

Ad 3 - Today BGP sessions goes down either via manual shut or via missing
keepalives. You are asking for bringing BGP sessions down based on missing
BGP Hellos. This is new state to BGP operation. If you remove this section
making BGP Hellos only for BGP session auto configuration bootstrapping as
ephemeral data - point will be addressed.

Thx,
R.



On Thu, Jul 12, 2018 at 4:17 AM, Ketan Talaulikar (ketant) <ketant@cisco.co=
m
> wrote:

> Hi Robert,
>
>
>
> Apologies for the delay in response. Please check inline below.
>
>
>
> *From:* rraszuk@gmail.com <rraszuk@gmail.com> *On Behalf Of *Robert Raszu=
k
> *Sent:* 04 July 2018 20:04
> *To:* Ketan Talaulikar (ketant) <ketant@cisco.com>
> *Cc:* idr wg <idr@ietf.org>; Susan Hares <shares@ndzh.com>
> *Subject:* Re: [Idr] draft-xu-idr-neighbor-autodiscovery-08
>
>
>
> Hi Ketan,
>
>
>
> Thank you for comments.
>
>
>
> I see two fundamental issues here:
>
>
>
> *Issue #1: *
>
>
>
> With all assumptions made in the draft about awareness of the "other side=
"
> as well as with the additional requirement to set per interface policy to
> scope the content of BGP Hellos to specific peer or peers what is propose=
d
> here is not autodiscovery. At most it is BGP build in automation for p2p
> BGP session auto provisioning. So inbound configuration automation. Don't
> we have sufficient set of tools already ? And this is only local ... It
> does not discover IBGP or EBGP peers far from each other like proposed in
> other IDR expired document: draft-raszuk-idr-bgp-auto-discovery-05
>
>
>
> I am really not sure if we should do that in BGP, but if so let's at leas=
t
> call it correctly.
>
> *[KT] The mechanism described in draft-xu-idr-neighbor-autodiscovery is
> expected to work for directly connected BGP routers and using a link-loca=
l
> signaling. As such, it is different from the draft that you propose in
> scope and purpose even though there are similarities.*
>
>
>
> *Issue #2: *
>
>
>
> As you mentioned some proposed already TLVs have nothing to do with BGP.
> What is defined is the IGP like interface_IDs discovery for the purpose o=
f
> LSVR. So initially LSVR claimed to *only* get passively BGP-LS informatio=
n.
> Now we see more stuff being defined to help LSVR. Where does it stop ? Do
> we really want to add this code to BGP protocol which creates a global
> Internet reachability only if someone thought about using LSVR in few DCs=
 ?
>
>
>
> You actually go further and already indicating that now BGP will be used
> as topology discovery for TE purposes. This is getting IMHO really bad.
>
>
>
> TLVs here look very innocent by itself ... but when you realize
> consequences this attaches LSVR together with core BGP - at least BGP cod=
e
> wise. I do not think this is good idea at all.
>
>
>
> Note that because basic BGP is used in few MSDCs there is number of
> followers which do want to use it also in much smaller DC fabrics. When y=
ou
> have few hundreds L3 nodes regular link state routing (even without any
> flooding reduction) would do much better job - but because of all of the
> noise to use BGP a lot of folks are getting very confused and positioning
> "BGP everywhere" regardless if this is optimal fit or not.
>
> *[KT] The draft does not propose or discuss any such aspects. It is
> primarily focused at DC deployments where BGP is already used/proposed.*
>
>
>
>
>
> + one more comment below ...
>
>
>
>
>
> *=E2=80=8B*
>
> *[KT] There is no intention to change the BGP state machine for the TCP
> session. *
>
>
>
> Well you are clearly calling for tearing down BGP upon missing reception
> of BGP Hello by removing reachability information. Well let's discuss thi=
s
> more. If BGP is established over connected interface (not to loopback) ho=
w
> do you attempt to bring down BGP when BGP peer will stop sending Hellos ?
>
>
>
> And if you have session between loopbacks is cutting reachability the bes=
t
> way to bring down BGP between two peers ? It sounds like we spend so much
> energy in routing BGP to be graceful that such brutal force is rather
> something to be avoided.
>
>
>
> So the way you are referring to deleting BGP sessions when Hellos stop
> does require quite some interaction with other BGP mechanisms as well as
> adjusting state machine. I understand you are trying to stay away from it
> .. well I am afraid it is not going to be possible :(.
>
> *[KT] Will work on updating the draft with co-authors to clarify/detail
> these aspects in an upcoming version.*
>
>
>
> *Thanks,*
>
> *Ketan*
>
>
>
>
>
> Thx,
>
> R.
>
>
>
>
>
>
>
> On Wed, Jul 4, 2018 at 11:49 AM, Ketan Talaulikar (ketant) <
> ketant@cisco.com> wrote:
>
> Hi Robert,
>
>
>
> Thanks for your review and comments. Please check inline below for
> responses.
>
>
>
>
>
> *From:* Idr <idr-bounces@ietf.org> *On Behalf Of *Robert Raszuk
> *Sent:* 04 July 2018 14:08
> *To:* idr wg <idr@ietf.org>
> *Subject:* [Idr] draft-xu-idr-neighbor-autodiscovery-08
>
>
>
>
>
> Few questions and comments on draft-xu-idr-neighbor-autodiscovery:
>
>
>
> 1. I recommend you rename HOLDTIME to H-TIME or R-TIME (Retention Time) i=
n
> order to avoid confusion with BGP OPEN HOLDTIME.
>
> *[KT] Ack =E2=80=93 we could rename it to disambiguate.*
>
>
>
> 2. While most of the text is consistent and talks about single peering
> address there is moment when plural form is used:  "that cover the peerin=
g
> address(es)". Can someone elaborate more on intention here to send multip=
le
> peering addresses ? Also if sending multiple peering addressed in BGP Hel=
lo
> is being considered where such addresses will be actually sent as Peering
> Address TLV clearly talks about single address
>
> *[KT] It may be desired to have multiple (say loopback) peering addresses
> for different types of BGP sessions. E.g. IPv4 and IPv6 or any other
> AFI/SAFI split. Also see next comment.*
>
>
>
> 3. Related to #2 if I would like to send both IPv4 and IPv6 peering
> addresses how those will be encoded ? Is there an assumption that Peering
> Address TLV will be present multiple times in such cases ?
>
> *[KT] Yes. One for each peering address.*
>
>
>
> 4.. Are proposed Hello messages supposed to be send over all interfaces o=
r
> it will be customized on a per outbound interface or group of interfaces
> basis ?
>
> *[KT] Customized on per interface basis that is defined by a local config
> policy/template.*
>
>
>
> 5. Having Peering Address TLV & Local Prefixes TLV (for cases of loopback
> peering) I don't quite see a need for Link Attribute TLV at all.
>
> *[KT] At this point it is to exchange interface ID and addresses so that
> the links may be defined in an unambiguous was in the BGP-LS Link NLRI fo=
r
> each of these links. This may be required for BGP-SPF or other use-cases =
in
> DC where we want to signal the underlying link topology for say TE.*
>
>
>
> 6. Likewise Neighbor TLV seems quite unnecessary to me. To whom it will b=
e
> sent ? To the peer we just established the peering with :) ? To other pee=
rs
> - why ?
>
> *[KT] There may be policies that allow a peering to be accepted on a
> specific link. It would be good to avoid one side trying setup a BGP
> session while the other does not wish to. This mechanism allows
> establishment of a 2-way state at each link level before the BGP session
> establishment happens and also to ensure that the =E2=80=9Cpeering route=
=E2=80=9D is
> actually setup over that link.*
>
>
>
> 7. One of the fundamental element of all BGP peerings is ability to detec=
t
> peering liveness without tuning down BGP holdtime timer. Yet this proposa=
l
> does not mention nor signal a bit about say BFD to be used mutually by bo=
th
> sides on the discovered links.
>
> *[KT] Yes, this was not covered explicitly but can be done optionally. Th=
e
> desire to run BFD is one such attribute that may be signaled using the li=
nk
> attribute TLV.*
>
>
>
> 8. The draft is also pretty silent on how often the BGP HELLOs  will be
> sent. For example is there an exponential timer allowing to slow down whe=
n
> the other side is not there yet ?
>
> *[KT] This would be very similar to how IGPs or LDP run their hello which
> is periodic but then also triggered when some change or a new neighbor is
> learnt.*
>
>
>
> 9.. The text I read in the last paragraph is super scary:
>
>
>
>    "A BGP peer
>
>    maintains a hold timer with each Hello adjacency that it restarts
>
>    when it receives a Hello that matches the adjacency.  If the timer
>
>    expires without receipt of a matching Hello from the peer, BGP
>
>    concludes that the peer no longer wishes to keep BGP session for that
>
>    link or that the peer has failed. The BGP peer then deletes the
>
>    Hello adjacency.  The route towards the BGP neighbor's loopback
>
>    address that had been dynamically created due to that BGP Hello
>
>    adjacency SHOULD be deleted accordingly.  When the last Hello
>
>    adjacency for an BGP session is deleted, the BGP peer terminates the
>
>    BGP session and closing the transport connection."
>
>
>
> Your recommendation for two octet BGP Hello Holdtime expressed in seconds
> is 15 sec. Are you invalidating use and state machine associated with BGP
> Keepalive MSG above? I recommend this text is removed as it adds a lot of
> new mechanism to BGP state machine.
>
> *=E2=80=8B=E2=80=8B*
>
> *[KT] There is no intention to change the BGP state machine for the TCP
> session. The hello procedure brings in its own mechanism which is gets to
> the same point where the BGP session is provisioned in existing procedure=
.
> Consider that an auto-discovered BGP session is to be removed or disabled
> on an interface. This can be done by taking that link out of this discove=
ry
> mechanism. Such an action should result in stopping the hellos and
> subsequently we also would like the BGP session state at TCP level to be
> cleaned up at both ends.*
>
>
>
> 10. Do you plane to actually update BGP state machine ?
>
> *[KT] No change. However, you are right that the relationship between the
> discovery mechanism and BGP state machine needs to be explained.*
>
>
>
> 11. At present your auto-discovery does not mention anything about use of
> BGP MD5 or TCP-A0. Is there an assumption that peers which are discoverin=
g
> themselves will have those configured ? Is there also an assumption that =
I
> should always trust information received with BGP Hello messages ?
> Shouldn't we perhaps aim at private/public key authentication model inste=
ad
> ?
>
> *[KT] This aspect still needs to be covered.*
>
>
>
> 12. Draft says:
>
>
>
> "BGP hello messages are only exchanged between physically connected peers
> that are trustworthy."
>
>
>
> How is that trust determined ? Is there an implicit assumption that BGP
> Hello is something you need to enable on a per physical interface basis
> where you know apriori the other side of the fiber ? Doesn't it reduce th=
e
> full automation one should expect out of this proposal ? Also when I peer
> with someone via L2 switch - still assume on a p2p basis - does this setu=
p
> prevents me from use of BGP Hello Messages ?
>
> *[KT] While this is true in a DC environment, perhaps we do need to defin=
e
> a generic security mechanism as part of this protocol extension.*
>
>
>
> *Thanks,*
>
> *Ketan*
>
>
>
> Thx,
>
> Robert.
>
>
>
> PS. I would like to first understand the authors perspective on the above
> observations before responding to Sue's WG adoption call.
>
>
>
>
>
>
>

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

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Ketan,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">Ad 1 - You missed the point of the issue. The point=
 was that you are *not* doing any discovery - at most automating some aspec=
ts of BGP provisioning for MSDCs. The other draft was just the example what=
 is auto discovery ie. you don&#39;t apriori know the other side. Here due =
to amount of policy required to scope BGP Hellos per interface you surely d=
o.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small">Ad 2 - If dra=
ft does not propose any such aspects please remove TLVs which are there for=
 LSVR.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Ad 3 - To=
day BGP sessions goes down either via manual shut or via missing keepalives=
. You are asking for bringing BGP sessions down based on missing BGP Hellos=
. This is new state to BGP operation. If you remove this section making BGP=
 Hellos only for BGP session auto configuration bootstrapping as ephemeral =
data - point will be addressed.=C2=A0</div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small">Thx,<br>R.</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On=
 Thu, Jul 12, 2018 at 4:17 AM, Ketan Talaulikar (ketant) <span dir=3D"ltr">=
&lt;<a href=3D"mailto:ketant@cisco.com" target=3D"_blank">ketant@cisco.com<=
/a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_129891530553470120WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Hi Robert,<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Apologies for the dela=
y in response. Please check inline below.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> <a href=3D"mailto:rraszuk@gmai=
l.com" target=3D"_blank">rraszuk@gmail.com</a> &lt;<a href=3D"mailto:rraszu=
k@gmail.com" target=3D"_blank">rraszuk@gmail.com</a>&gt;
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> 04 July 2018 20:04<br>
<b>To:</b> Ketan Talaulikar (ketant) &lt;<a href=3D"mailto:ketant@cisco.com=
" target=3D"_blank">ketant@cisco.com</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" targe=
t=3D"_blank">shares@ndzh.com</a>&gt;<br>
<b>Subject:</b> Re: [Idr] draft-xu-idr-neighbor-<wbr>autodiscovery-08<u></u=
><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Hi Ketan,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thank you for comments.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I see two fundamental issues here:<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Arial&quot;,sans=
-serif">Issue #1:=C2=A0</span></b><span style=3D"font-family:&quot;Arial&qu=
ot;,sans-serif"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">With all assumptions made in the draft about awareness of the &quot;ot=
her side&quot; as well as with the additional requirement to set per interf=
ace policy to scope the content of BGP Hellos to specific
 peer or peers what is proposed here is not autodiscovery. At most it is BG=
P build in automation for p2p BGP session auto provisioning. So inbound con=
figuration automation. Don&#39;t we have sufficient set of tools already ? =
And this is only local ... It does not
 discover IBGP or EBGP peers far from each other like proposed in other IDR=
 expired document:=C2=A0draft-raszuk-idr-<wbr>bgp-auto-discovery-05<u></u><=
u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I am really not sure if we should do that in BGP, but if so let&#39;s =
at least call it correctly.=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] The mechanism descr=
ibed in draft-xu-idr-neighbor-<wbr>autodiscovery is expected to work for di=
rectly connected BGP routers and using a link-local signaling.
 As such, it is different from the draft that you propose in scope and purp=
ose even though there are similarities.</span></i></b><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u=
><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Arial&quot;,sans=
-serif">Issue #2:=C2=A0</span></b><span style=3D"font-family:&quot;Arial&qu=
ot;,sans-serif"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">As you mentioned some proposed already TLVs have nothing to do with BG=
P. What is defined is the IGP like interface_IDs discovery for the purpose =
of LSVR. So initially LSVR claimed to *only* get
 passively BGP-LS information. Now we see more stuff being defined to help =
LSVR. Where does it stop ? Do we really want to add this code to BGP protoc=
ol which creates a global Internet reachability only if someone thought abo=
ut using LSVR in few DCs ?=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">You actually go further and already indicating that now BGP will be us=
ed as topology discovery for TE purposes. This is getting IMHO really bad.=
=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">TLVs here look very innocent by itself ... but when you realize conseq=
uences this attaches LSVR together with core BGP - at least BGP code wise. =
I do not think this is good idea at all.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Note that because basic BGP is used in few MSDCs there is number of fo=
llowers which do want to use it also in much smaller DC fabrics. When you h=
ave few hundreds L3 nodes regular link state routing
 (even without any flooding reduction) would do much better job - but becau=
se of all of the noise to use BGP a lot of folks are getting very confused =
and positioning &quot;BGP everywhere&quot; regardless if this is optimal fi=
t or not.=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] The draft does not =
propose or discuss any such aspects. It is primarily focused at DC deployme=
nts where BGP is already used/proposed.</span></i></b><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u=
><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">+ one more comment below ...=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><b><i><span style=3D"font-family:&quot;Arial&quot;,s=
ans-serif;color:#1f497d;background:white">=E2=80=8B<u></u><u></u></span></i=
></b></p>
</div>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d;background:white">[KT] There is =
no intention to change the BGP state machine for the TCP session.=C2=A0</sp=
an></i></b><span style=3D"font-family:&quot;Arial&quot;,sans-serif">
<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Well you are clearly calling for tearing down BGP upon missing recepti=
on of BGP Hello by removing reachability information. Well let&#39;s discus=
s this more. If BGP is established over connected
 interface (not to loopback) how do you attempt to bring down BGP when BGP =
peer will stop sending Hellos ?=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">And if you have session between loopbacks is cutting reachability the =
best way to bring down BGP between two peers ? It sounds like we spend so m=
uch energy in routing BGP to be graceful that
 such brutal force is rather something to be avoided.=C2=A0<u></u><u></u></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
</span><div><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">So the way you are referring to deleting BGP sessions when Hellos stop=
 does require quite some interaction with other BGP mechanisms as well as a=
djusting state machine. I understand you are trying
 to stay away from it .. well I am afraid it is not going to be possible :(=
.=C2=A0<u></u><u></u></span></p>
</span><p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Will work on updati=
ng the draft with co-authors to clarify/detail these aspects in an upcoming=
 version.<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Thanks,<u></u><u></u></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Ketan</span></i></b><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><u></u><u></u></span></p>
</div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">R.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jul 4, 2018 at 11:49 AM, Ketan Talaulikar (k=
etant) &lt;<a href=3D"mailto:ketant@cisco.com" target=3D"_blank">ketant@cis=
co.com</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Hi Robert,</span><u></=
u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Thanks for your review=
 and comments. Please check inline below for responses.</span><u></u><u></u=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Idr &lt;<a href=3D"mailto:idr-=
bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> 04 July 2018 14:08<br>
<b>To:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;<br>
<b>Subject:</b> [Idr] draft-xu-idr-neighbor-<wbr>autodiscovery-08</span><u>=
</u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Few questions and comments on=C2=A0draft-xu-idr-neighbor-<wbr>autodisc=
overy:</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">1. I recommend you rename HOLDTIME to H-TIME or R-TIME (Retention Time=
) in order to avoid confusion with BGP OPEN HOLDTIME.=C2=A0</span><u></u><u=
></u></p>
</div>
<div>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Ack =E2=80=93 we could ren=
ame it to disambiguate.</span></i></b><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">2. While most of the text is consistent and talks about single peering=
 address there is moment when plural form is used:=C2=A0 &quot;that cover
 the peering address(es)&quot;. Can someone elaborate more on intention her=
e to send multiple peering addresses ? Also if sending multiple peering add=
ressed in BGP Hello is being considered where such addresses will be actual=
ly sent as Peering Address TLV clearly
 talks about single address</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] It may be desired to have =
multiple (say loopback) peering addresses for different types
 of BGP sessions. E.g. IPv4 and IPv6 or any other AFI/SAFI split. Also see =
next comment.</span></i></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">3. Related to #2 if I would like to send both IPv4 and IPv6 peering ad=
dresses how those will be encoded ? Is there an assumption that
 Peering Address TLV will be present multiple times in such cases ?=C2=A0</=
span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Yes. One for each peering =
address.</span></i></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">4.. Are proposed Hello messages supposed to be send over all interface=
s or it will be customized on a per outbound interface or group
 of interfaces basis ?=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Customized on per interfac=
e basis that is defined by a local config policy/template.</span></i></b><u=
></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">5. Having Peering Address TLV &amp; Local Prefixes TLV (for cases of l=
oopback peering) I don&#39;t quite see a need for Link Attribute TLV at
 all.=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] At this point it is to exc=
hange interface ID and addresses so that the links may be defined
 in an unambiguous was in the BGP-LS Link NLRI for each of these links. Thi=
s may be required for BGP-SPF or other use-cases in DC where we want to sig=
nal the underlying link topology for say TE.</span></i></b><u></u><u></u></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">6. Likewise Neighbor TLV seems quite unnecessary to me. To whom it wil=
l be sent ? To the peer we just established the peering with :)
 ? To other peers - why ?=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] There may be policies that=
 allow a peering to be accepted on a specific link. It would be
 good to avoid one side trying setup a BGP session while the other does not=
 wish to. This mechanism allows establishment of a 2-way state at each link=
 level before the BGP session establishment happens and also to ensure that=
 the =E2=80=9Cpeering route=E2=80=9D is actually
 setup over that link.</span></i></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">7. One of the fundamental element of all BGP peerings is ability to de=
tect peering liveness without tuning down BGP holdtime timer.
 Yet this proposal does not mention nor signal a bit about say BFD to be us=
ed mutually by both sides on the discovered links.=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] Yes, this was not covered =
explicitly but can be done optionally. The desire to run BFD is
 one such attribute that may be signaled using the link attribute TLV.</spa=
n></i></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">8. The draft is also pretty silent on how often the BGP HELLOs=C2=A0 w=
ill be sent. For example is there an exponential timer allowing to
 slow down when the other side is not there yet ?=C2=A0</span><u></u><u></u=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] This would be very similar=
 to how IGPs or LDP run their hello which is periodic but then
 also triggered when some change or a new neighbor is learnt.</span></i></b=
><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">9.. The text I read in the last paragraph is super scary:</span><u></u=
><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0&quot;A BGP peer</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0maintains a hold timer with each Hello adjacency that it =
restarts</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0when it receives a Hello that matches the adjacency.=C2=
=A0 If the timer</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0expires without receipt of a matching Hello from the peer=
, BGP</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0concludes that the peer no longer wishes to keep BGP sess=
ion for that</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0link or that the peer has failed. The BGP peer then delet=
es the</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0Hello adjacency.=C2=A0 The route towards the BGP neighbor=
&#39;s loopback</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0address that had been dynamically created due to that BGP=
 Hello</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0adjacency SHOULD be deleted accordingly.=C2=A0 When the l=
ast Hello</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0adjacency for an BGP session is deleted, the BGP peer ter=
minates the</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0 =C2=A0BGP session and closing the transport connection.&quot;</=
span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Your recommendation for two octet BGP Hello Holdtime expressed in seco=
nds is 15 sec. Are you invalidating use and state machine associated
 with BGP Keepalive MSG above? I recommend this text is removed as it adds =
a lot of new mechanism to BGP state machine.=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><b><i><span style=3D"font-family:&quot;Arial&quot;,s=
ans-serif">=E2=80=8B=E2=80=8B</span></i></b><span style=3D"font-family:&quo=
t;Arial&quot;,sans-serif"><u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><b><i>[KT] There is no intention to change the BGP s=
tate machine for the TCP session. The hello procedure brings in its own mec=
hanism which is gets to the same point where the BGP session is provisioned=
 in existing procedure. Consider that
 an auto-discovered BGP session is to be removed or disabled on an interfac=
e. This can be done by taking that link out of this discovery mechanism. Su=
ch an action should result in stopping the hellos and subsequently we also =
would like the BGP session state
 at TCP level to be cleaned up at both ends.</i></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">10. Do you plane to actually update BGP state machine ?=C2=A0</span><u=
></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] No change. However, you ar=
e right that the relationship between the discovery mechanism
 and BGP state machine needs to be explained.</span></i></b><u></u><u></u><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">11. At present your auto-discovery does not mention anything about use=
 of BGP MD5 or TCP-A0. Is there an assumption that peers which
 are discovering themselves will have those configured ? Is there also an a=
ssumption that I should always trust information received with BGP Hello me=
ssages ? Shouldn&#39;t we perhaps aim at private/public key authentication =
model instead ?=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] This aspect still needs to=
 be covered.</span></i></b><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">12. Draft says:=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&quot;BGP hello messages are only exchanged between physically connect=
ed peers that are trustworthy.&quot;=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">How is that trust determined ? Is there an implicit assumption that BG=
P Hello is something you need to enable on a per physical interface
 basis where you know apriori the other side of the fiber ? Doesn&#39;t it =
reduce the full automation one should expect out of this proposal ? Also wh=
en I peer with someone via L2 switch - still assume on a p2p basis - does t=
his setup prevents me from use of BGP
 Hello Messages ?</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[KT] While this is true in a DC=
 environment, perhaps we do need to define a generic security
 mechanism as part of this protocol extension.</span></i></b><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">=C2=A0</span></i></b><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Thanks,</span></i></b><u></u><u=
></u></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Ketan</span></i></b><u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Robert.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">PS. I would like to first understand the authors perspective on the ab=
ove observations before responding to Sue&#39;s WG adoption call.=C2=A0</sp=
an><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>
</div>

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

--00000000000072b7110570c9794d--


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Cc: Idr <idr-bounces@ietf.org>, Gaurav Dawra <gdawra.ietf@gmail.com>, idr wg <idr@ietf.org>, lsvr-chairs <lsvr-chairs@ietf.org>,  draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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And that is precisely what IMHO we should avoid.

Clear separation from BGP global routing and BGP as IGP including LSVR is:

- extremely important for stability of the former
- very need for innovation and new features velocity of the latter

Thx,
R.

On Thu, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=
=85=88) <xiaohu.xxh@alibaba-inc.com>
wrote:

> Hi Gunter,
>
> Thanks for your email and suggestion. I believe the BGP peer discovery
> mechanism as described in this draft is applicable to the use of BGP as I=
GP
> (https://tools.ietf.org/html/rfc7938) and LSVR as well.
>
> Ketan, one co-auhtor of this draft would present this draft on the LSVR
> session.
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Gunter Van De Velde <guntervandeveldecc=3D40icloud.com@dmarc.ietf.or=
g>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 15:24
> To:Gaurav Dawra <gdawra.ietf@gmail.com>
> Cc:idr wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-
> autodiscovery@ietf.org>; Susan Hares <shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
> LSVR realises that there is need for a neighbour and liveliness detection
> mechanism, and is making effort to understand the particular LSVR
> requirements for a solution.
>
> From a very high level perspective, there are few ways to address the
> aspect of LSVR peer discovery and liveliness detection:
> 1) Create something new
> 2) Extend something existing
> 3) Re-use something existing
>
> LSVR has no technology religion about any of these, and would like to
> progress with a solution space that most
> optimal answers the particular LSVR requirements.
>
> Within LSVR WG meeting at IETF102, there is time reserved to discuss abou=
t
> these matters, and if you feel interested, we could add this draft into t=
he
> agenda?
>
> Brgds,
> G/
>
>
>
>
>
> On 11 Jul 2018, at 19:39, Gaurav Dawra <gdawra.ietf@gmail.com> wrote:
>
> Hi Sue,
>
> Support.
>
> 1) Yes
> 2) Yes, BGP is most commonly used in most DCs. However, it may have
> applications beyond that.
> 3) yes, in order to simplify operations for DCs. Single CP is needed.
> 4) it should be reviewed by LSVR WG.
>
> Gaurav
>
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
>
> Greetings:
>
>
>
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisco=
very
> (July 2 =E2=80=93 July 16).
>
>
>
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>
>
>
> The authors of this draft should send their IPR statements in response to
> this email.  I hope the authors will ihelp their vacationing co-authors t=
o
> respond by July 7th.
>
>
>
> The WG should consider the following:
>
> 1)      Does BGP need to have an autodiscovery mechanism for peers within
> Data Centers?
>
> 2)      Does this mechanism work for other deployments?
>
>
>
> 3)      If so, should be passed in BGP Hello message?
>
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>
>
>
> 4)      Does this interact with any of the LSVR work?
>
>
>
> I want to thank the authors for their patience while we sorted through
> some of the WG LC for other drafts.  We decided to wait until some of tho=
se
> discussion were cleared up prior to starting a new WG Adoption call.
>
>
>
>
>
> Susan Hares
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">And that i=
s precisely what IMHO we should avoid.=C2=A0</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">Clear separation from BGP global routing and BGP as =
IGP including LSVR is:=C2=A0</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">- extremely important for stability of the former=C2=A0</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">- very need for innovation and new features velocity of the l=
atter=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">R.</div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Thu, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=
=8E(=E4=B9=89=E5=85=88) <span dir=3D"ltr">&lt;<a href=3D"mailto:xiaohu.xxh@=
alibaba-inc.com" target=3D"_blank">xiaohu.xxh@alibaba-inc.com</a>&gt;</span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-916283656994915=
1362__aliyun_email_body_block"><div style=3D"line-height:1.7;font-family:Ta=
homa,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><div style=3D"cle=
ar:both">Hi Gunter,=C2=A0</div><div style=3D"clear:both"><br></div><div sty=
le=3D"clear:both">Thanks for your email and suggestion. I believe the BGP p=
eer discovery mechanism as described in this draft is applicable to the use=
 of BGP as IGP (<a href=3D"https://tools.ietf.org/html/rfc7938" target=3D"_=
blank">https://tools.ietf.org/html/<wbr>rfc7938</a>) and LSVR as well.=C2=
=A0</div><div style=3D"clear:both"><br></div><div style=3D"clear:both">Keta=
n, one co-auhtor of this draft would present this draft on the=C2=A0LSVR se=
ssion.</div><div style=3D"clear:both"><br></div><div style=3D"clear:both">B=
est regards,</div><div style=3D"clear:both">Xiaohu</div><div class=3D"m_-91=
62836569949151362clear: m_-9162836569949151362both"><br></div><blockquote s=
tyle=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma,Aria=
l,STHeiti,SimSun;font-size:14.0px;color:#000000"><div class=3D"m_-916283656=
9949151362clear: m_-9162836569949151362both">------------------------------=
<wbr>------------------------------<wbr>------</div><div class=3D"m_-916283=
6569949151362clear: m_-9162836569949151362both">From:Gunter Van De Velde &l=
t;guntervandeveldecc=3D<a href=3D"mailto:40icloud.com@dmarc.ietf.org" targe=
t=3D"_blank">40icloud.<wbr>com@dmarc.ietf.org</a>&gt;</div><div class=3D"m_=
-9162836569949151362clear: m_-9162836569949151362both">Send Time:2018=E5=B9=
=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 15:24</div><div class=
=3D"m_-9162836569949151362clear: m_-9162836569949151362both">To:Gaurav Dawr=
a &lt;<a href=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank">gdawra.iet=
f@gmail.com</a>&gt;</div><div class=3D"m_-9162836569949151362clear: m_-9162=
836569949151362both">Cc:idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=
=3D"_blank">idr@ietf.org</a>&gt;; lsvr-chairs &lt;<a href=3D"mailto:lsvr-ch=
airs@ietf.org" target=3D"_blank">lsvr-chairs@ietf.org</a>&gt;; draft-xu-idr=
-neighbor-<wbr>autodiscovery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-au=
todiscovery@ietf.org" target=3D"_blank">draft-xu-idr-neighbor-<wbr>autodisc=
overy@ietf.org</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" =
target=3D"_blank">shares@ndzh.com</a>&gt;</div><div class=3D"m_-91628365699=
49151362clear: m_-9162836569949151362both">Subject:Re: [Idr] WG adoption ca=
ll for draft-xu-idr-neighbor-<wbr>autodiscovery</div><div><div class=3D"h5"=
><div class=3D"m_-9162836569949151362clear: m_-9162836569949151362both"><br=
></div>LSVR realises that there is need for a neighbour and liveliness dete=
ction mechanism, and is making effort to understand the particular LSVR req=
uirements for a solution.=C2=A0<div><br></div><div>From a very high level p=
erspective, there are few ways to address the aspect of LSVR peer discovery=
 and liveliness detection:</div><div>1) Create something new</div><div>2) E=
xtend something existing</div><div>3) Re-use something existing</div><div><=
br><div>LSVR has no technology religion about any of these, and would like =
to progress with a solution space that most=C2=A0</div><div>optimal answers=
 the particular LSVR requirements.=C2=A0</div><div><br></div><div>Within LS=
VR WG meeting at IETF102, there is time reserved to discuss about these mat=
ters, and if you feel interested, we could add this draft into the agenda?<=
/div><div><br></div><div>Brgds,</div><div>G/</div><div><br></div><div><br><=
/div><div><br></div><div><br></div><div><br><div>On 11 Jul 2018, at 19:39, =
Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank"=
>gdawra.ietf@gmail.com</a>&gt; wrote:</div><br class=3D"m_-9162836569949151=
362Apple-interchange-newline"><div><div></div><div>Hi Sue,<div><br></div><d=
iv>Support.</div><div><br></div><div>1) Yes</div><div>2) Yes, BGP is most c=
ommonly used in most DCs. However, it may have applications beyond that.</d=
iv><div>3) yes, in order to simplify operations for DCs. Single CP is neede=
d.</div><div>4) it should be reviewed by LSVR WG.</div><div><br></div><div>=
Gaurav</div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mo=
n, Jul 2, 2018 at 10:08 AM, Susan Hares <span>&lt;<a href=3D"mailto:shares@=
ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt;</span> wrote:<br><div c=
lass=3D"m_-9162836569949151362m_5148942973323166637WordSection1"><p class=
=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px=
;padding-bottom:.0px">Greetings: </p><p class=3D"MsoNormal" style=3D"margin=
-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</=
p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-b=
ottom:.0px;padding-bottom:.0px">This begins a 2 week WG adoption call for d=
raft-xu-idr-neighbor-<wbr>autodiscovery (July 2 =E2=80=93 July 16).=C2=A0 <=
/p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-=
bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"=
margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px"><a=
 href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscove=
ry/" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draft-xu-idr-n=
eighbor-<wbr>autodiscovery/</a></p><p class=3D"MsoNormal" style=3D"margin-t=
op:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p>=
<p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bot=
tom:.0px;padding-bottom:.0px">The authors of this draft should send their I=
PR statements in response to this email.=C2=A0 I hope the authors will ihel=
p their vacationing co-authors to respond by July 7<sup>th</sup>.=C2=A0 </p=
><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bo=
ttom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"ma=
rgin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">The =
WG should consider the following: </p><p class=3D"m_-9162836569949151362m_5=
148942973323166637MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0=
px;margin-bottom:.0px;padding-bottom:.0px"><span>1)<span style=3D"font-styl=
e:normal;font-variant-caps:normal;font-weight:normal;font-stretch:normal;fo=
nt-size:9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 </span></span>Does BGP need to have an autodiscovery mec=
hanism for peers within Data Centers? </p><p class=3D"m_-916283656994915136=
2m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;padding-to=
p:.0px;margin-bottom:.0px;padding-bottom:.0px"><span>2)<span style=3D"font-=
style:normal;font-variant-caps:normal;font-weight:normal;font-stretch:norma=
l;font-size:9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 </span></span>Does this mechanism work for other depl=
oyments? </p><p class=3D"m_-9162836569949151362m_5148942973323166637MsoList=
Paragraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;pad=
ding-bottom:.0px">=C2=A0</p><p class=3D"m_-9162836569949151362m_51489429733=
23166637MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;margin-=
bottom:.0px;padding-bottom:.0px"><span>3)<span style=3D"font-style:normal;f=
ont-variant-caps:normal;font-weight:normal;font-stretch:normal;font-size:9.=
0px;line-height:normal;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 </span></span>If so, should be passed in BGP Hello message?=C2=A0=
 </p><p class=3D"m_-9162836569949151362m_5148942973323166637MsoListParagrap=
h" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bot=
tom:.0px">Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=
 </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margi=
n-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"m_-916283656994915=
1362m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;padding=
-top:.0px;margin-bottom:.0px;padding-bottom:.0px"><span>4)<span style=3D"fo=
nt-style:normal;font-variant-caps:normal;font-weight:normal;font-stretch:no=
rmal;font-size:9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>Does this interact with any of the L=
SVR work? </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.=
0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal=
" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bott=
om:.0px">I want to thank the authors for their patience while we sorted thr=
ough some of the WG LC for other drafts.=C2=A0 We decided to wait until som=
e of those discussion were cleared up prior to starting a new WG Adoption c=
all.<span class=3D"m_-9162836569949151362HOEnZb"><span style=3D"color:#8888=
88"></span></span></p><span style=3D"color:#888888"><p class=3D"MsoNormal" =
style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom=
:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-to=
p:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNor=
mal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-b=
ottom:.0px">Susan Hares </p></span></div><br>______________________________=
<wbr>_________________<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@i=
etf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br><br></div=
><br></div></div>______________________________<wbr>_________________<br>Id=
r mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@iet=
f.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br></div></d=
iv><br></div></div></div></blockquote><div style=3D"line-height:20.0px;clea=
r:both"><br></div></div></div><br>______________________________<wbr>______=
___________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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Date: Thu, 12 Jul 2018 17:06:05 +0800
From: "=?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?=" <xiaohu.xxh@alibaba-inc.com>
To: "rraszuk" <rraszuk@gmail.com>
Cc: "Idr" <idr-bounces@ietf.org>, "Gaurav Dawra" <gdawra.ietf@gmail.com>, "idr wg" <idr@ietf.org>, "lsvr-chairs" <lsvr-chairs@ietf.org>, "draft-xu-idr-neighbor-autodiscovery" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  "Susan Hares" <shares@ndzh.com>
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In-Reply-To: <89530067-fe75-4301-ad0e-35f3891cbfaa.xiaohu.xxh@alibaba-inc.com>
References: <013701d41227$579d2d10$06d78730$@ndzh.com> <E0D48054-CE8E-44AE-AD22-D95F56CAF603@gmail.com> <7220CFF5-1AF7-4644-B078-E545BDF2E346@icloud.com> <242ed290-d6e9-41f9-931d-955e81f62f0d.xiaohu.xxh@alibaba-inc.com> <CA+b+ERn72WsAJj2Em4qZzDSiEcGbh1mhGO+CM0aD_JXPcOX6NQ@mail.gmail.com> <89530067-fe75-4301-ad0e-35f3891cbfaa.xiaohu.xxh@alibaba-inc.com>
From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 12 Jul 2018 11:12:58 +0200
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Cc: Idr <idr-bounces@ietf.org>, Gaurav Dawra <gdawra.ietf@gmail.com>, idr wg <idr@ietf.org>, lsvr-chairs <lsvr-chairs@ietf.org>,  draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/oDA3R6oKGjLp1xVa6_7dWxPLyqM>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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BGP code is a BGP code and regardless if this is running on a router in the
Internet or in the MSDC , regardless if it comes from vendor X, Y or Z it
is the same code base.

It is *BAD*  idea to now glue BGP code base with LSVR. And this is first
draft which attempts do so in a very subtle manner by proposing two TLVs.

If we allow this to go through (because of sympathy to "reuse existing"
approach) the consequences down the road will be rather ugly for all BGP
based worlds (Internet, MSDC, but also enterprises with internal routing,
users of L2 and L3VPN etc ...).

Thx,
R.



On Thu, Jul 12, 2018 at 11:06 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=
=85=88) <xiaohu.xxh@alibaba-inc.com>
wrote:

> Robert,
>
> The mechanism as described in this draft is only targeted for the
> MSDC where RFC7938 has been enabled. It's absolutely not targeted for the
> global routing system:)
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Robert Raszuk <robert@raszuk.net>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 17:00
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-in=
c.com>
> Cc:Idr <idr-bounces@ietf.org>; Gaurav Dawra <gdawra.ietf@gmail.com>; idr
> wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-
> autodiscovery@ietf.org>; Susan Hares <shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
>
> And that is precisely what IMHO we should avoid.
>
> Clear separation from BGP global routing and BGP as IGP including LSVR is=
:
>
> - extremely important for stability of the former
> - very need for innovation and new features velocity of the latter
>
> Thx,
> R.
>
> On Thu, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88) <xiaohu.xxh@alibaba-inc.com>
> wrote:
> Hi Gunter,
>
> Thanks for your email and suggestion. I believe the BGP peer discovery
> mechanism as described in this draft is applicable to the use of BGP as I=
GP
> (https://tools.ietf.org/html/rfc7938) and LSVR as well.
>
> Ketan, one co-auhtor of this draft would present this draft on the LSVR
> session.
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Gunter Van De Velde <guntervandeveldecc=3D40icloud.com@dmarc.ietf.or=
g>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 15:24
> To:Gaurav Dawra <gdawra.ietf@gmail.com>
> Cc:idr wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-
> autodiscovery@ietf.org>; Susan Hares <shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
> LSVR realises that there is need for a neighbour and liveliness detection
> mechanism, and is making effort to understand the particular LSVR
> requirements for a solution.
>
> From a very high level perspective, there are few ways to address the
> aspect of LSVR peer discovery and liveliness detection:
> 1) Create something new
> 2) Extend something existing
> 3) Re-use something existing
>
> LSVR has no technology religion about any of these, and would like to
> progress with a solution space that most
> optimal answers the particular LSVR requirements.
>
> Within LSVR WG meeting at IETF102, there is time reserved to discuss abou=
t
> these matters, and if you feel interested, we could add this draft into t=
he
> agenda?
>
> Brgds,
> G/
>
>
>
>
>
> On 11 Jul 2018, at 19:39, Gaurav Dawra <gdawra.ietf@gmail.com> wrote:
>
> Hi Sue,
>
> Support.
>
> 1) Yes
> 2) Yes, BGP is most commonly used in most DCs. However, it may have
> applications beyond that.
> 3) yes, in order to simplify operations for DCs. Single CP is needed.
> 4) it should be reviewed by LSVR WG.
>
> Gaurav
>
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
>
> Greetings:
>
>
>
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisco=
very
> (July 2 =E2=80=93 July 16).
>
>
>
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>
>
>
> The authors of this draft should send their IPR statements in response to
> this email.  I hope the authors will ihelp their vacationing co-authors t=
o
> respond by July 7th.
>
>
>
> The WG should consider the following:
>
> 1)      Does BGP need to have an autodiscovery mechanism for peers within
> Data Centers?
>
> 2)      Does this mechanism work for other deployments?
>
>
>
> 3)      If so, should be passed in BGP Hello message?
>
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>
>
>
> 4)      Does this interact with any of the LSVR work?
>
>
>
> I want to thank the authors for their patience while we sorted through
> some of the WG LC for other drafts.  We decided to wait until some of tho=
se
> discussion were cleared up prior to starting a new WG Adoption call.
>
>
>
>
>
> Susan Hares
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
>

--000000000000f4d52c0570c9c489
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">BGP code i=
s a BGP code and regardless if this is running on a router in the Internet =
or in the MSDC , regardless if it comes from vendor X, Y or Z it is the sam=
e code base.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">It =
is *BAD*=C2=A0 idea to now glue BGP code base with LSVR. And this is first =
draft which attempts do so in a very subtle manner by proposing two TLVs.=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">If we allow thi=
s to go through (because of sympathy to &quot;reuse existing&quot; approach=
) the consequences down the road will be rather ugly for all BGP based worl=
ds (Internet, MSDC, but also enterprises with internal routing, users of L2=
 and L3VPN etc ...).=C2=A0</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all">Thx,<br>R.</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu,=
 Jul 12, 2018 at 11:06 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) =
<span dir=3D"ltr">&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=
=3D"_blank">xiaohu.xxh@alibaba-inc.com</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><div class=3D"m_-875688759599363633__aliyun_email_body_=
block"><div style=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSu=
n;font-size:14.0px;color:#000000"><div style=3D"clear:both">Robert,</div><d=
iv style=3D"clear:both"><br></div><div style=3D"clear:both">The mechanism a=
s described in this draft is only targeted for the MSDC=C2=A0where RFC7938 =
has been enabled. It&#39;s absolutely not targeted for the global routing s=
ystem:)</div><div style=3D"clear:both"><br></div><div style=3D"clear:both">=
Best regards,</div><div style=3D"clear:both">Xiaohu</div><div class=3D"m_-8=
75688759599363633clear: m_-875688759599363633both"><br></div><blockquote st=
yle=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma,Arial=
,STHeiti,SimSun;font-size:14.0px;color:#000000"><div class=3D"m_-8756887595=
99363633clear: m_-875688759599363633both">------------------------------<wb=
r>------------------------------<wbr>------</div><div class=3D"m_-875688759=
599363633clear: m_-875688759599363633both">From:Robert Raszuk &lt;<a href=
=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;</=
div><div class=3D"m_-875688759599363633clear: m_-875688759599363633both">Se=
nd Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 17:=
00</div><div class=3D"m_-875688759599363633clear: m_-875688759599363633both=
">To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a href=3D"mailto:=
xiaohu.xxh@alibaba-inc.com" target=3D"_blank">xiaohu.xxh@alibaba-inc.com</a=
>&gt;</div><div class=3D"m_-875688759599363633clear: m_-875688759599363633b=
oth">Cc:Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">i=
dr-bounces@ietf.org</a>&gt;; Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf=
@gmail.com" target=3D"_blank">gdawra.ietf@gmail.com</a>&gt;; idr wg &lt;<a =
href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;; lsvr-c=
hairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" target=3D"_blank">lsvr-ch=
airs@ietf.org</a>&gt;; draft-xu-idr-neighbor-<wbr>autodiscovery &lt;<a href=
=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" target=3D"_blank">=
draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>&gt;; Susan Hares &lt;=
<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt=
;</div><div><div class=3D"h5"><div class=3D"m_-875688759599363633clear: m_-=
875688759599363633both">Subject:Re: [Idr] WG adoption call for draft-xu-idr=
-neighbor-<wbr>autodiscovery</div><div class=3D"m_-875688759599363633clear:=
 m_-875688759599363633both"><br></div><div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small">And that is precisely what IMHO we should avoid.=C2=A0</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">Clear separation from BGP =
global routing and BGP as IGP including LSVR is:=C2=A0</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">- extremely important for stability of the=
 former=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">- very need for innovation and new fe=
atures velocity of the latter=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">Thx,</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small">R.</div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Thu, Jul 12, 2018 at 10:54 AM, =
=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <span>&lt;<a href=3D"mailto=
:xiaohu.xxh@alibaba-inc.com" target=3D"_blank">xiaohu.xxh@alibaba-inc.com</=
a>&gt;</span> wrote:<br><div style=3D"line-height:1.7;font-family:Tahoma,Ar=
ial,STHeiti,SimSun;font-size:14.0px;color:#000000"><div style=3D"clear:both=
">Hi Gunter,=C2=A0</div><div style=3D"clear:both"><br></div><div style=3D"c=
lear:both">Thanks for your email and suggestion. I believe the BGP peer dis=
covery mechanism as described in this draft is applicable to the use of BGP=
 as IGP (<a href=3D"https://tools.ietf.org/html/rfc7938" target=3D"_blank">=
https://tools.ietf.org/html/<wbr>rfc7938</a>) and LSVR as well.=C2=A0</div>=
<div style=3D"clear:both"><br></div><div style=3D"clear:both">Ketan, one co=
-auhtor of this draft would present this draft on the=C2=A0LSVR session.</d=
iv><div style=3D"clear:both"><br></div><div style=3D"clear:both">Best regar=
ds,</div><div style=3D"clear:both">Xiaohu</div><div class=3D"m_-87568875959=
9363633m_-9162836569949151362clear: m_-875688759599363633m_-916283656994915=
1362both"><br></div><div class=3D"m_-875688759599363633m_-91628365699491513=
62clear: m_-875688759599363633m_-9162836569949151362both">-----------------=
-------------<wbr>------------------------------<wbr>------</div><div class=
=3D"m_-875688759599363633m_-9162836569949151362clear: m_-875688759599363633=
m_-9162836569949151362both">From:Gunter Van De Velde &lt;guntervandeveldecc=
=3D<a href=3D"mailto:40icloud.com@dmarc.ietf.org" target=3D"_blank">40iclou=
d.<wbr>com@dmarc.ietf.org</a>&gt;</div><div class=3D"m_-875688759599363633m=
_-9162836569949151362clear: m_-875688759599363633m_-9162836569949151362both=
">Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 15:24</div><div class=3D"m_-875688759599363633m_-9162836569949151362clear:=
 m_-875688759599363633m_-9162836569949151362both">To:Gaurav Dawra &lt;<a hr=
ef=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank">gdawra.ietf@gmail.com=
</a>&gt;</div><div class=3D"m_-875688759599363633m_-9162836569949151362clea=
r: m_-875688759599363633m_-9162836569949151362both">Cc:idr wg &lt;<a href=
=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;; lsvr-chair=
s &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" target=3D"_blank">lsvr-chairs=
@ietf.org</a>&gt;; draft-xu-idr-neighbor-<wbr>autodiscovery &lt;<a href=3D"=
mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" target=3D"_blank">draf=
t-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>&gt;; Susan Hares &lt;<a h=
ref=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt;</d=
iv><div class=3D"m_-875688759599363633m_-9162836569949151362clear: m_-87568=
8759599363633m_-9162836569949151362both">Subject:Re: [Idr] WG adoption call=
 for draft-xu-idr-neighbor-<wbr>autodiscovery</div><div class=3D"m_-8756887=
59599363633h5"><div class=3D"m_-875688759599363633m_-9162836569949151362cle=
ar: m_-875688759599363633m_-9162836569949151362both"><br></div>LSVR realise=
s that there is need for a neighbour and liveliness detection mechanism, an=
d is making effort to understand the particular LSVR requirements for a sol=
ution.=C2=A0<div><br></div><div>From a very high level perspective, there a=
re few ways to address the aspect of LSVR peer discovery and liveliness det=
ection:</div><div>1) Create something new</div><div>2) Extend something exi=
sting</div><div>3) Re-use something existing</div><div><br><div>LSVR has no=
 technology religion about any of these, and would like to progress with a =
solution space that most=C2=A0</div><div>optimal answers the particular LSV=
R requirements.=C2=A0</div><div><br></div><div>Within LSVR WG meeting at IE=
TF102, there is time reserved to discuss about these matters, and if you fe=
el interested, we could add this draft into the agenda?</div><div><br></div=
><div>Brgds,</div><div>G/</div><div><br></div><div><br></div><div><br></div=
><div><br></div><div><br><div>On 11 Jul 2018, at 19:39, Gaurav Dawra &lt;<a=
 href=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank">gdawra.ietf@gmail.=
com</a>&gt; wrote:</div><br class=3D"m_-875688759599363633m_-91628365699491=
51362Apple-interchange-newline"><div><div>Hi Sue,<div><br></div><div>Suppor=
t.</div><div><br></div><div>1) Yes</div><div>2) Yes, BGP is most commonly u=
sed in most DCs. However, it may have applications beyond that.</div><div>3=
) yes, in order to simplify operations for DCs. Single CP is needed.</div><=
div>4) it should be reviewed by LSVR WG.</div><div><br></div><div>Gaurav</d=
iv><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jul 2,=
 2018 at 10:08 AM, Susan Hares <span>&lt;<a href=3D"mailto:shares@ndzh.com"=
 target=3D"_blank">shares@ndzh.com</a>&gt;</span> wrote:<br><div class=3D"m=
_-875688759599363633m_-9162836569949151362m_5148942973323166637WordSection1=
"><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-b=
ottom:.0px;padding-bottom:.0px">Greetings: </p><p class=3D"MsoNormal" style=
=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px=
">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0p=
x;margin-bottom:.0px;padding-bottom:.0px">This begins a 2 week WG adoption =
call for draft-xu-idr-neighbor-<wbr>autodiscovery (July 2 =E2=80=93 July 16=
).=C2=A0 </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0=
px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal"=
 style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-botto=
m:.0px"><a href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-a=
utodiscovery/" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draf=
t-xu-idr-neighbor-<wbr>autodiscovery/</a></p><p class=3D"MsoNormal" style=
=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px=
">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0p=
x;margin-bottom:.0px;padding-bottom:.0px">The authors of this draft should =
send their IPR statements in response to this email.=C2=A0 I hope the autho=
rs will ihelp their vacationing co-authors to respond by July 7<sup>th</sup=
>.=C2=A0 </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0=
px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal"=
 style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-botto=
m:.0px">The WG should consider the following: </p><p class=3D"m_-8756887595=
99363633m_-9162836569949151362m_5148942973323166637MsoListParagraph" style=
=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px=
"><span>1)<span style=3D"font-style:normal;font-variant-caps:normal;font-we=
ight:normal;font-stretch:normal;font-size:9.0px;line-height:normal;font-fam=
ily:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>Does BGP =
need to have an autodiscovery mechanism for peers within Data Centers? </p>=
<p class=3D"m_-875688759599363633m_-9162836569949151362m_514894297332316663=
7MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:=
.0px;padding-bottom:.0px"><span>2)<span style=3D"font-style:normal;font-var=
iant-caps:normal;font-weight:normal;font-stretch:normal;font-size:9.0px;lin=
e-height:normal;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 </span></span>Does this mechanism work for other deployments? </p><p class=
=3D"m_-875688759599363633m_-9162836569949151362m_5148942973323166637MsoList=
Paragraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;pad=
ding-bottom:.0px">=C2=A0</p><p class=3D"m_-875688759599363633m_-91628365699=
49151362m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;pad=
ding-top:.0px;margin-bottom:.0px;padding-bottom:.0px"><span>3)<span style=
=3D"font-style:normal;font-variant-caps:normal;font-weight:normal;font-stre=
tch:normal;font-size:9.0px;line-height:normal;font-family:Times New Roman">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>If so, should be passed in BGP=
 Hello message?=C2=A0 </p><p class=3D"m_-875688759599363633m_-9162836569949=
151362m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;paddi=
ng-top:.0px;margin-bottom:.0px;padding-bottom:.0px">Or should it be a part =
of another protocol (e.g. LLDP, BFD, etc). </p><p class=3D"MsoNormal" style=
=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px=
">=C2=A0</p><p class=3D"m_-875688759599363633m_-9162836569949151362m_514894=
2973323166637MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;ma=
rgin-bottom:.0px;padding-bottom:.0px"><span>4)<span style=3D"font-style:nor=
mal;font-variant-caps:normal;font-weight:normal;font-stretch:normal;font-si=
ze:9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 </span></span>Does this interact with any of the LSVR work? </=
p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-b=
ottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"m=
argin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">I w=
ant to thank the authors for their patience while we sorted through some of=
 the WG LC for other drafts.=C2=A0 We decided to wait until some of those d=
iscussion were cleared up prior to starting a new WG Adoption call.<span cl=
ass=3D"m_-875688759599363633m_-9162836569949151362HOEnZb"></span></p><span =
style=3D"color:#888888"><p class=3D"MsoNormal" style=3D"margin-top:.0px;pad=
ding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D=
"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;pa=
dding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0p=
x;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">Susan Hares </p>=
</span></div><br>______________________________<wbr>_________________<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@i=
etf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br><br></div=
><br></div></div>______________________________<wbr>_________________<br>Id=
r mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@iet=
f.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br></div></d=
iv><br></div></div><div style=3D"line-height:20.0px;clear:both"><br></div><=
/div><br>______________________________<wbr>_________________<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@i=
etf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br><br></div=
><br></div></div></div></blockquote><div style=3D"line-height:20.0px;clear:=
both"><br></div></div></div></blockquote></div><br></div>

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Date: Thu, 12 Jul 2018 17:32:59 +0800
From: "=?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?=" <xiaohu.xxh@alibaba-inc.com>
To: "rraszuk" <rraszuk@gmail.com>
Cc: "Idr" <idr-bounces@ietf.org>, "Gaurav Dawra" <gdawra.ietf@gmail.com>, "idr wg" <idr@ietf.org>, "lsvr-chairs" <lsvr-chairs@ietf.org>, "draft-xu-idr-neighbor-autodiscovery" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  "Susan Hares" <shares@ndzh.com>
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Cc: Idr <idr-bounces@ietf.org>, Gaurav Dawra <gdawra.ietf@gmail.com>, idr wg <idr@ietf.org>, lsvr-chairs <lsvr-chairs@ietf.org>,  draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/2oEEIL1Pyzp-rdira7u9IrPzGjw>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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On Thu, Jul 12, 2018 at 11:32 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=
=85=88) <xiaohu.xxh@alibaba-inc.com>
wrote:

> What's LSVR in your mind? isn't it built on the existing BGP code base?
>


=E2=80=8BNo. Please see LSVR charter=E2=80=8B:


*The LSVR protocol is intended as a self-standing routing protocol even if
using existing BGP transport mechanisms and encodings, or if sharing the
same transport session with other existing BGP address families.  *

=E2=80=8BHere we are proposing even tighter dependency ... information in B=
GP
Hellos to be critical element of LSVR operation. =E2=80=8BToday someone can=
 very
easily move LSVR transport to say TI-BGP proposed separated at the port
level sessions.

But if you add even single hard attachment to BGP for LSVR like proposed
TLVs it will become a hard anchor.



> By the way, have you heard any interest on this mechanism from users of
> the L2/L3VPN?:)
>

=E2=80=8BYou missed =E2=80=8Bit ... it was not about their interest in LSVR=
 or BGP Hellos
... it was about their fear that something they do not need will impact
them due to bugs.


Cheers
R.





>
> Xiaohu
>
> ------------------------------------------------------------------
> From:Robert Raszuk <robert@raszuk.net>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 17:13
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-in=
c.com>
> Cc:Idr <idr-bounces@ietf.org>; Gaurav Dawra <gdawra.ietf@gmail.com>; idr
> wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-
> autodiscovery@ietf.org>; Susan Hares <shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
>
> BGP code is a BGP code and regardless if this is running on a router in
> the Internet or in the MSDC , regardless if it comes from vendor X, Y or =
Z
> it is the same code base.
>
> It is *BAD*  idea to now glue BGP code base with LSVR. And this is first
> draft which attempts do so in a very subtle manner by proposing two TLVs.
>
> If we allow this to go through (because of sympathy to "reuse existing"
> approach) the consequences down the road will be rather ugly for all BGP
> based worlds (Internet, MSDC, but also enterprises with internal routing,
> users of L2 and L3VPN etc ...).
>
> Thx,
> R.
>
>
>
> On Thu, Jul 12, 2018 at 11:06 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88) <xiaohu.xxh@alibaba-inc.com>
> wrote:
> Robert,
>
> The mechanism as described in this draft is only targeted for the
> MSDC where RFC7938 has been enabled. It's absolutely not targeted for the
> global routing system:)
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Robert Raszuk <robert@raszuk.net>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 17:00
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-in=
c.com>
> Cc:Idr <idr-bounces@ietf.org>; Gaurav Dawra <gdawra.ietf@gmail.com>; idr
> wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-
> autodiscovery@ietf.org>; Susan Hares <shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
>
> And that is precisely what IMHO we should avoid.
>
> Clear separation from BGP global routing and BGP as IGP including LSVR is=
:
>
> - extremely important for stability of the former
> - very need for innovation and new features velocity of the latter
>
> Thx,
> R.
>
> On Thu, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88) <xiaohu.xxh@alibaba-inc.com>
> wrote:
> Hi Gunter,
>
> Thanks for your email and suggestion. I believe the BGP peer discovery
> mechanism as described in this draft is applicable to the use of BGP as I=
GP
> (https://tools.ietf.org/html/rfc7938) and LSVR as well.
>
> Ketan, one co-auhtor of this draft would present this draft on the LSVR
> session.
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Gunter Van De Velde <guntervandeveldecc=3D40icloud.com@dmarc.ietf.or=
g>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 15:24
> To:Gaurav Dawra <gdawra.ietf@gmail.com>
> Cc:idr wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-
> autodiscovery@ietf.org>; Susan Hares <shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
> LSVR realises that there is need for a neighbour and liveliness detection
> mechanism, and is making effort to understand the particular LSVR
> requirements for a solution.
>
> From a very high level perspective, there are few ways to address the
> aspect of LSVR peer discovery and liveliness detection:
> 1) Create something new
> 2) Extend something existing
> 3) Re-use something existing
>
> LSVR has no technology religion about any of these, and would like to
> progress with a solution space that most
> optimal answers the particular LSVR requirements.
>
> Within LSVR WG meeting at IETF102, there is time reserved to discuss abou=
t
> these matters, and if you feel interested, we could add this draft into t=
he
> agenda?
>
> Brgds,
> G/
>
>
>
>
>
> On 11 Jul 2018, at 19:39, Gaurav Dawra <gdawra.ietf@gmail.com> wrote:
>
> Hi Sue,
>
> Support.
>
> 1) Yes
> 2) Yes, BGP is most commonly used in most DCs. However, it may have
> applications beyond that.
> 3) yes, in order to simplify operations for DCs. Single CP is needed.
> 4) it should be reviewed by LSVR WG.
>
> Gaurav
>
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
>
> Greetings:
>
>
>
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisco=
very
> (July 2 =E2=80=93 July 16).
>
>
>
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>
>
>
> The authors of this draft should send their IPR statements in response to
> this email.  I hope the authors will ihelp their vacationing co-authors t=
o
> respond by July 7th.
>
>
>
> The WG should consider the following:
>
> 1)      Does BGP need to have an autodiscovery mechanism for peers within
> Data Centers?
>
> 2)      Does this mechanism work for other deployments?
>
>
>
> 3)      If so, should be passed in BGP Hello message?
>
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>
>
>
> 4)      Does this interact with any of the LSVR work?
>
>
>
> I want to thank the authors for their patience while we sorted through
> some of the WG LC for other drafts.  We decided to wait until some of tho=
se
> discussion were cleared up prior to starting a new WG Adoption call.
>
>
>
>
>
> Susan Hares
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_extra"><b=
r><div class=3D"gmail_quote">On Thu, Jul 12, 2018 at 11:32 AM, =E5=BE=90=E5=
=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <span dir=3D"ltr">&lt;<a href=3D"mailto=
:xiaohu.xxh@alibaba-inc.com" target=3D"_blank">xiaohu.xxh@alibaba-inc.com</=
a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-562=
1627023200128196__aliyun_email_body_block"><div style=3D"line-height:1.7;fo=
nt-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><div =
style=3D"clear:both">What&#39;s LSVR in your mind? isn&#39;t it built on th=
e existing BGP code base?</div></div></div></blockquote><div><br></div><div=
><br></div><div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">=E2=80=8BNo. Please see LSVR charter=E2=
=80=8B:=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">

<b><span style=3D"font-family:&quot;PT Serif&quot;,Palatino,&quot;Neue Swif=
t&quot;,serif;font-size:15px;background-color:rgb(255,255,255);text-decorat=
ion-style:initial;text-decoration-color:initial;float:none;display:inline">=
The LSVR protocol is intended as a self-standing routing protocol even if u=
sing existing BGP transport mechanisms and encodings, or if sharing the sam=
e transport session with other existing BGP address families.<span>=C2=A0</=
span></span>

<br></b></div><br></div><div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small">=E2=80=8BHere we are propos=
ing even tighter dependency ... information in BGP Hellos to be critical el=
ement of LSVR operation. =E2=80=8BToday someone can very easily move LSVR t=
ransport to say TI-BGP proposed separated at the port level sessions.=C2=A0=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">But if you add even s=
ingle hard attachment to BGP for LSVR like proposed TLVs it will become a h=
ard anchor.=C2=A0</div></div><div><br></div><div>=C2=A0<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex"><div class=3D"m_-5621627023200128196__aliyun_email_bod=
y_block"><div style=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,Sim=
Sun;font-size:14.0px;color:#000000"><div style=3D"clear:both">By the way, h=
ave you heard any interest on this mechanism from users of the L2/L3VPN?:)<=
br></div></div></div></blockquote><div><br></div><div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
=E2=80=8BYou missed =E2=80=8Bit ... it was not about their interest in LSVR=
 or BGP Hellos ... it was about their fear that something they do not need =
will impact them due to bugs.</div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Cheers</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</di=
v><br></div><div><br></div><div><br></div><div>=C2=A0</div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex"><div class=3D"m_-5621627023200128196__aliyun_email_body_bloc=
k"><div style=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;fo=
nt-size:14.0px;color:#000000"><div style=3D"clear:both"></div><div style=3D=
"clear:both"><br></div><div style=3D"clear:both">Xiaohu</div><div class=3D"=
m_-5621627023200128196clear: m_-5621627023200128196both"><br></div><blockqu=
ote style=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma=
,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><div class=3D"m_-5621=
627023200128196clear: m_-5621627023200128196both">-------------------------=
-----<wbr>------------------------------<wbr>------</div><div class=3D"m_-5=
621627023200128196clear: m_-5621627023200128196both">From:Robert Raszuk &lt=
;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</=
a>&gt;</div><div class=3D"m_-5621627023200128196clear: m_-56216270232001281=
96both">Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=
=9B=9B) 17:13</div><div class=3D"m_-5621627023200128196clear: m_-5621627023=
200128196both">To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a hr=
ef=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=3D"_blank">xiaohu.xxh@aliba=
ba-inc.com</a>&gt;</div><div class=3D"m_-5621627023200128196clear: m_-56216=
27023200128196both">Cc:Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" targ=
et=3D"_blank">idr-bounces@ietf.org</a>&gt;; Gaurav Dawra &lt;<a href=3D"mai=
lto:gdawra.ietf@gmail.com" target=3D"_blank">gdawra.ietf@gmail.com</a>&gt;;=
 idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org<=
/a>&gt;; lsvr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" target=3D"=
_blank">lsvr-chairs@ietf.org</a>&gt;; draft-xu-idr-neighbor-<wbr>autodiscov=
ery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" tar=
get=3D"_blank">draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>&gt;; S=
usan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@=
ndzh.com</a>&gt;</div><div class=3D"m_-5621627023200128196clear: m_-5621627=
023200128196both">Subject:Re: [Idr] WG adoption call for draft-xu-idr-neigh=
bor-<wbr>autodiscovery</div><div class=3D"m_-5621627023200128196clear: m_-5=
621627023200128196both"><br></div><div><div style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><br></div><div style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">BGP code is a BGP code and regardles=
s if this is running on a router in the Internet or in the MSDC , regardles=
s if it comes from vendor X, Y or Z it is the same code base.=C2=A0</div><d=
iv style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">It=
 is *BAD*=C2=A0 idea to now glue BGP code base with LSVR. And this is first=
 draft which attempts do so in a very subtle manner by proposing two TLVs.=
=C2=A0</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:=
small"><br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small">If we allow this to go through (because of sympathy to &quot;re=
use existing&quot; approach) the consequences down the road will be rather =
ugly for all BGP based worlds (Internet, MSDC, but also enterprises with in=
ternal routing, users of L2 and L3VPN etc ...).=C2=A0</div><div style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</div=
><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">=
On Thu, Jul 12, 2018 at 11:06 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=
=85=88) <span>&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=3D"_=
blank">xiaohu.xxh@alibaba-inc.com</a>&gt;</span> wrote:<br><div style=3D"li=
ne-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;colo=
r:#000000"><div style=3D"clear:both">Robert,</div><div style=3D"clear:both"=
><br></div><div style=3D"clear:both">The mechanism as described in this dra=
ft is only targeted for the MSDC=C2=A0where RFC7938 has been enabled. It&#3=
9;s absolutely not targeted for the global routing system:)</div><div style=
=3D"clear:both"><br></div><div style=3D"clear:both">Best regards,</div><div=
 style=3D"clear:both">Xiaohu</div><div class=3D"m_-5621627023200128196m_-87=
5688759599363633clear: m_-5621627023200128196m_-875688759599363633both"><br=
></div><div class=3D"m_-5621627023200128196m_-875688759599363633clear: m_-5=
621627023200128196m_-875688759599363633both">------------------------------=
<wbr>------------------------------<wbr>------</div><div class=3D"m_-562162=
7023200128196m_-875688759599363633clear: m_-5621627023200128196m_-875688759=
599363633both">From:Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" =
target=3D"_blank">robert@raszuk.net</a>&gt;</div><div class=3D"m_-562162702=
3200128196m_-875688759599363633clear: m_-5621627023200128196m_-875688759599=
363633both">Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=
=E5=9B=9B) 17:00</div><div class=3D"m_-5621627023200128196m_-87568875959936=
3633clear: m_-5621627023200128196m_-875688759599363633both">To:=E5=BE=90=E5=
=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a href=3D"mailto:xiaohu.xxh@alibab=
a-inc.com" target=3D"_blank">xiaohu.xxh@alibaba-inc.com</a>&gt;</div><div c=
lass=3D"m_-5621627023200128196m_-875688759599363633clear: m_-56216270232001=
28196m_-875688759599363633both">Cc:Idr &lt;<a href=3D"mailto:idr-bounces@ie=
tf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;; Gaurav Dawra &lt;<a=
 href=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank">gdawra.ietf@gmail.=
com</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">i=
dr@ietf.org</a>&gt;; lsvr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org=
" target=3D"_blank">lsvr-chairs@ietf.org</a>&gt;; draft-xu-idr-neighbor-<wb=
r>autodiscovery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@i=
etf.org" target=3D"_blank">draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.or=
g</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_bl=
ank">shares@ndzh.com</a>&gt;</div><div class=3D"m_-5621627023200128196h5"><=
div class=3D"m_-5621627023200128196m_-875688759599363633clear: m_-562162702=
3200128196m_-875688759599363633both">Subject:Re: [Idr] WG adoption call for=
 draft-xu-idr-neighbor-<wbr>autodiscovery</div><div class=3D"m_-56216270232=
00128196m_-875688759599363633clear: m_-5621627023200128196m_-87568875959936=
3633both"><br></div><div><div style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small">And that is precisely what IMHO we should avoid.=
=C2=A0</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:=
small"><br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small">Clear separation from BGP global routing and BGP as IGP includi=
ng LSVR is:=C2=A0</div><div style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small"><br></div><div style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">- extremely important for stability of the former=C2=
=A0</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll">- very need for innovation and new features velocity of the latter=C2=
=A0</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll"><br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Thx,</div><div style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">R.</div></div><div class=3D"gmail_extra"><br><div class=3D"gm=
ail_quote">On Thu, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=
=E4=B9=89=E5=85=88) <span>&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com"=
 target=3D"_blank">xiaohu.xxh@alibaba-inc.com</a>&gt;</span> wrote:<br><div=
 style=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size=
:14.0px;color:#000000"><div style=3D"clear:both">Hi Gunter,=C2=A0</div><div=
 style=3D"clear:both"><br></div><div style=3D"clear:both">Thanks for your e=
mail and suggestion. I believe the BGP peer discovery mechanism as describe=
d in this draft is applicable to the use of BGP as IGP (<a href=3D"https://=
tools.ietf.org/html/rfc7938" target=3D"_blank">https://tools.ietf.org/html/=
<wbr>rfc7938</a>) and LSVR as well.=C2=A0</div><div style=3D"clear:both"><b=
r></div><div style=3D"clear:both">Ketan, one co-auhtor of this draft would =
present this draft on the=C2=A0LSVR session.</div><div style=3D"clear:both"=
><br></div><div style=3D"clear:both">Best regards,</div><div style=3D"clear=
:both">Xiaohu</div><div class=3D"m_-5621627023200128196m_-87568875959936363=
3m_-9162836569949151362clear: m_-5621627023200128196m_-875688759599363633m_=
-9162836569949151362both"><br></div><div class=3D"m_-5621627023200128196m_-=
875688759599363633m_-9162836569949151362clear: m_-5621627023200128196m_-875=
688759599363633m_-9162836569949151362both">------------------------------<w=
br>------------------------------<wbr>------</div><div class=3D"m_-56216270=
23200128196m_-875688759599363633m_-9162836569949151362clear: m_-56216270232=
00128196m_-875688759599363633m_-9162836569949151362both">From:Gunter Van De=
 Velde &lt;guntervandeveldecc=3D<a href=3D"mailto:40icloud.com@dmarc.ietf.o=
rg" target=3D"_blank">40icloud.<wbr>com@dmarc.ietf.org</a>&gt;</div><div cl=
ass=3D"m_-5621627023200128196m_-875688759599363633m_-9162836569949151362cle=
ar: m_-5621627023200128196m_-875688759599363633m_-9162836569949151362both">=
Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 1=
5:24</div><div class=3D"m_-5621627023200128196m_-875688759599363633m_-91628=
36569949151362clear: m_-5621627023200128196m_-875688759599363633m_-91628365=
69949151362both">To:Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf@gmail.co=
m" target=3D"_blank">gdawra.ietf@gmail.com</a>&gt;</div><div class=3D"m_-56=
21627023200128196m_-875688759599363633m_-9162836569949151362clear: m_-56216=
27023200128196m_-875688759599363633m_-9162836569949151362both">Cc:idr wg &l=
t;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;; l=
svr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" target=3D"_blank">ls=
vr-chairs@ietf.org</a>&gt;; draft-xu-idr-neighbor-<wbr>autodiscovery &lt;<a=
 href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" target=3D"_bl=
ank">draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>&gt;; Susan Hares=
 &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</=
a>&gt;</div><div class=3D"m_-5621627023200128196m_-875688759599363633m_-916=
2836569949151362clear: m_-5621627023200128196m_-875688759599363633m_-916283=
6569949151362both">Subject:Re: [Idr] WG adoption call for draft-xu-idr-neig=
hbor-<wbr>autodiscovery</div><div class=3D"m_-5621627023200128196m_-8756887=
59599363633h5"><div class=3D"m_-5621627023200128196m_-875688759599363633m_-=
9162836569949151362clear: m_-5621627023200128196m_-875688759599363633m_-916=
2836569949151362both"><br></div>LSVR realises that there is need for a neig=
hbour and liveliness detection mechanism, and is making effort to understan=
d the particular LSVR requirements for a solution.=C2=A0<div><br></div><div=
>From a very high level perspective, there are few ways to address the aspe=
ct of LSVR peer discovery and liveliness detection:</div><div>1) Create som=
ething new</div><div>2) Extend something existing</div><div>3) Re-use somet=
hing existing</div><div><br><div>LSVR has no technology religion about any =
of these, and would like to progress with a solution space that most=C2=A0<=
/div><div>optimal answers the particular LSVR requirements.=C2=A0</div><div=
><br></div><div>Within LSVR WG meeting at IETF102, there is time reserved t=
o discuss about these matters, and if you feel interested, we could add thi=
s draft into the agenda?</div><div><br></div><div>Brgds,</div><div>G/</div>=
<div><br></div><div><br></div><div><br></div><div><br></div><div><br><div>O=
n 11 Jul 2018, at 19:39, Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf@gma=
il.com" target=3D"_blank">gdawra.ietf@gmail.com</a>&gt; wrote:</div><br cla=
ss=3D"m_-5621627023200128196m_-875688759599363633m_-9162836569949151362Appl=
e-interchange-newline"><div><div>Hi Sue,<div><br></div><div>Support.</div><=
div><br></div><div>1) Yes</div><div>2) Yes, BGP is most commonly used in mo=
st DCs. However, it may have applications beyond that.</div><div>3) yes, in=
 order to simplify operations for DCs. Single CP is needed.</div><div>4) it=
 should be reviewed by LSVR WG.</div><div><br></div><div>Gaurav</div><div c=
lass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jul 2, 2018 at =
10:08 AM, Susan Hares <span>&lt;<a href=3D"mailto:shares@ndzh.com" target=
=3D"_blank">shares@ndzh.com</a>&gt;</span> wrote:<br><div class=3D"m_-56216=
27023200128196m_-875688759599363633m_-9162836569949151362m_5148942973323166=
637WordSection1"><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-to=
p:.0px;margin-bottom:.0px;padding-bottom:.0px">Greetings: </p><p class=3D"M=
soNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padd=
ing-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;=
padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">This begins a 2 we=
ek WG adoption call for draft-xu-idr-neighbor-<wbr>autodiscovery (July 2 =
=E2=80=93 July 16).=C2=A0 </p><p class=3D"MsoNormal" style=3D"margin-top:.0=
px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p cl=
ass=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.=
0px;padding-bottom:.0px"><a href=3D"https://datatracker.ietf.org/doc/draft-=
xu-idr-neighbor-autodiscovery/" target=3D"_blank">https://datatracker.ietf.=
org/<wbr>doc/draft-xu-idr-neighbor-<wbr>autodiscovery/</a></p><p class=3D"M=
soNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padd=
ing-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;=
padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">The authors of thi=
s draft should send their IPR statements in response to this email.=C2=A0 I=
 hope the authors will ihelp their vacationing co-authors to respond by Jul=
y 7<sup>th</sup>.=C2=A0 </p><p class=3D"MsoNormal" style=3D"margin-top:.0px=
;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p clas=
s=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0p=
x;padding-bottom:.0px">The WG should consider the following: </p><p class=
=3D"m_-5621627023200128196m_-875688759599363633m_-9162836569949151362m_5148=
942973323166637MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;=
margin-bottom:.0px;padding-bottom:.0px"><span>1)<span style=3D"font-style:n=
ormal;font-variant-caps:normal;font-weight:normal;font-stretch:normal;font-=
size:9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 </span></span>Does BGP need to have an autodiscovery mechan=
ism for peers within Data Centers? </p><p class=3D"m_-5621627023200128196m_=
-875688759599363633m_-9162836569949151362m_5148942973323166637MsoListParagr=
aph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-b=
ottom:.0px"><span>2)<span style=3D"font-style:normal;font-variant-caps:norm=
al;font-weight:normal;font-stretch:normal;font-size:9.0px;line-height:norma=
l;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span=
>Does this mechanism work for other deployments? </p><p class=3D"m_-5621627=
023200128196m_-875688759599363633m_-9162836569949151362m_514894297332316663=
7MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:=
.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"m_-5621627023200128196m_-87=
5688759599363633m_-9162836569949151362m_5148942973323166637MsoListParagraph=
" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bott=
om:.0px"><span>3)<span style=3D"font-style:normal;font-variant-caps:normal;=
font-weight:normal;font-stretch:normal;font-size:9.0px;line-height:normal;f=
ont-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>If=
 so, should be passed in BGP Hello message?=C2=A0 </p><p class=3D"m_-562162=
7023200128196m_-875688759599363633m_-9162836569949151362m_51489429733231666=
37MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom=
:.0px;padding-bottom:.0px">Or should it be a part of another protocol (e.g.=
 LLDP, BFD, etc). </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;paddi=
ng-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"m=
_-5621627023200128196m_-875688759599363633m_-9162836569949151362m_514894297=
3323166637MsoListParagraph" style=3D"margin-top:.0px;padding-top:.0px;margi=
n-bottom:.0px;padding-bottom:.0px"><span>4)<span style=3D"font-style:normal=
;font-variant-caps:normal;font-weight:normal;font-stretch:normal;font-size:=
9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 </span></span>Does this interact with any of the LSVR work? </p><=
p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bott=
om:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"marg=
in-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">I want=
 to thank the authors for their patience while we sorted through some of th=
e WG LC for other drafts.=C2=A0 We decided to wait until some of those disc=
ussion were cleared up prior to starting a new WG Adoption call.</p><span s=
tyle=3D"color:#888888"><p class=3D"MsoNormal" style=3D"margin-top:.0px;padd=
ing-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"=
MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;pad=
ding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px=
;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">Susan Hares </p><=
/span></div><br>______________________________<wbr>_________________<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@i=
etf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br><br></div=
><br></div></div>______________________________<wbr>_________________<br>Id=
r mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@iet=
f.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br></div></d=
iv><br></div></div><div style=3D"line-height:20.0px;clear:both"><br></div><=
/div><br>______________________________<wbr>_________________<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@i=
etf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=
=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br><br></div=
><br></div></div><div style=3D"line-height:20.0px;clear:both"><br></div></d=
iv></div><br></div></blockquote><div style=3D"line-height:20.0px;clear:both=
"><br></div></div></div></blockquote></div><br></div></div>

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Date: Thu, 12 Jul 2018 18:18:25 +0800
From: "=?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?=" <xiaohu.xxh@alibaba-inc.com>
To: "rraszuk" <rraszuk@gmail.com>
Cc: "Idr" <idr-bounces@ietf.org>, "Gaurav Dawra" <gdawra.ietf@gmail.com>, "idr wg" <idr@ietf.org>, "lsvr-chairs" <lsvr-chairs@ietf.org>, "draft-xu-idr-neighbor-autodiscovery" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  "Susan Hares" <shares@ndzh.com>
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------=ALIBOUNDARY_1470_4c066940_5b472af1_20c442--



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References: <013701d41227$579d2d10$06d78730$@ndzh.com> <E0D48054-CE8E-44AE-AD22-D95F56CAF603@gmail.com> <7220CFF5-1AF7-4644-B078-E545BDF2E346@icloud.com> <242ed290-d6e9-41f9-931d-955e81f62f0d.xiaohu.xxh@alibaba-inc.com> <CA+b+ERn72WsAJj2Em4qZzDSiEcGbh1mhGO+CM0aD_JXPcOX6NQ@mail.gmail.com> <89530067-fe75-4301-ad0e-35f3891cbfaa.xiaohu.xxh@alibaba-inc.com> <CA+b+ERn32brH+yqM5XQsu_uiW+Jp_kMeim86j_EDHbFhJogQVA@mail.gmail.com> <28ef469c-19d6-43b8-a881-d697e7a8569c.xiaohu.xxh@alibaba-inc.com> <CA+b+ERnZMFrxY6z=2ZknNnj5hNp+aEieZ1d3YFNCYVAiWiePZw@mail.gmail.com> <ebd538bb-2db8-4b61-8cca-a504e3545e6c.xiaohu.xxh@alibaba-inc.com>
In-Reply-To: <ebd538bb-2db8-4b61-8cca-a504e3545e6c.xiaohu.xxh@alibaba-inc.com>
From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 12 Jul 2018 14:27:05 +0200
Message-ID: <CA+b+ERmYDEJ3ofS-v3vO2Qh2wYbfTmWrHo6AqiK+gHpEyH1=Kw@mail.gmail.com>
To: =?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= <xiaohu.xxh@alibaba-inc.com>
Cc: Idr <idr-bounces@ietf.org>, Gaurav Dawra <gdawra.ietf@gmail.com>, idr wg <idr@ietf.org>, lsvr-chairs <lsvr-chairs@ietf.org>,  draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/T79eVFWJPNtQuF2_Jz2rKhrk4m0>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Xiaohu,

Even most solid bag will break if you keep loading it with junk ....

Best,
R.

On Thu, Jul 12, 2018, 12:18 =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)=
 <xiaohu.xxh@alibaba-inc.com> wrote:

> Robert,
>
> Please see my response inline.
>
> ------------------------------------------------------------------
> From:Robert Raszuk <robert@raszuk.net>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 17:58
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-in=
c.com>
> Cc:Idr <idr-bounces@ietf.org>; Gaurav Dawra <gdawra.ietf@gmail.com>; idr
> wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <
> draft-xu-idr-neighbor-autodiscovery@ietf.org>; Susan Hares <
> shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
>
>
> On Thu, Jul 12, 2018 at 11:32 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88) <xiaohu.xxh@alibaba-inc.com>
> wrote:
> What's LSVR in your mind? isn't it built on the existing BGP code base?
>
>
> No. Please see LSVR charter:
>
>
> *The LSVR protocol is intended as a self-standing routing protocol even i=
f
> using existing BGP transport mechanisms and encodings, or if sharing the
> same transport session with other existing BGP address families. *
>
> Here we are proposing even tighter dependency ... information in BGP
> Hellos to be critical element of LSVR operation. Today someone can very
> easily move LSVR transport to say TI-BGP proposed separated at the port
> level sessions.
>
> [Xiaohu] Sorry that I don't much understand your points. Did you mean tha=
t
> some information in the BGP Hello messages should be removed? If so, I'm
> fully open to discuss with you about this.
>
> But if you add even single hard attachment to BGP for LSVR like proposed
> TLVs it will become a hard anchor.
>
>
> By the way, have you heard any interest on this mechanism from users of
> the L2/L3VPN?:)
>
> You missed it ... it was not about their interest in LSVR or BGP Hellos
> ... it was about their fear that something they do not need will impact
> them due to bugs.
>
> [Xiaohu] Oh, my god. Some BGP users don't need multicast in their
> networks, should we stop defining BGP extensions for multicast due to the
> fears of potential bugs?
>
> Best regards,
> Xiaohu
>
>
> Cheers
> R.
>
>
>
>
>
> Xiaohu
>
> ------------------------------------------------------------------
> From:Robert Raszuk <robert@raszuk.net>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 17:13
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-in=
c.com>
> Cc:Idr <idr-bounces@ietf.org>; Gaurav Dawra <gdawra.ietf@gmail.com>; idr
> wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <
> draft-xu-idr-neighbor-autodiscovery@ietf.org>; Susan Hares <
> shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
>
> BGP code is a BGP code and regardless if this is running on a router in
> the Internet or in the MSDC , regardless if it comes from vendor X, Y or =
Z
> it is the same code base.
>
> It is *BAD*  idea to now glue BGP code base with LSVR. And this is first
> draft which attempts do so in a very subtle manner by proposing two TLVs.
>
> If we allow this to go through (because of sympathy to "reuse existing"
> approach) the consequences down the road will be rather ugly for all BGP
> based worlds (Internet, MSDC, but also enterprises with internal routing,
> users of L2 and L3VPN etc ...).
>
> Thx,
> R.
>
>
>
> On Thu, Jul 12, 2018 at 11:06 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88) <xiaohu.xxh@alibaba-inc.com>
> wrote:
> Robert,
>
> The mechanism as described in this draft is only targeted for the
> MSDC where RFC7938 has been enabled. It's absolutely not targeted for the
> global routing system:)
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Robert Raszuk <robert@raszuk.net>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 17:00
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-in=
c.com>
> Cc:Idr <idr-bounces@ietf.org>; Gaurav Dawra <gdawra.ietf@gmail.com>; idr
> wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <
> draft-xu-idr-neighbor-autodiscovery@ietf.org>; Susan Hares <
> shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
>
> And that is precisely what IMHO we should avoid.
>
> Clear separation from BGP global routing and BGP as IGP including LSVR is=
:
>
> - extremely important for stability of the former
> - very need for innovation and new features velocity of the latter
>
> Thx,
> R.
>
> On Thu, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88) <xiaohu.xxh@alibaba-inc.com>
> wrote:
> Hi Gunter,
>
> Thanks for your email and suggestion. I believe the BGP peer discovery
> mechanism as described in this draft is applicable to the use of BGP as I=
GP
> (https://tools.ietf.org/html/rfc7938) and LSVR as well.
>
> Ketan, one co-auhtor of this draft would present this draft on the LSVR
> session.
>
> Best regards,
> Xiaohu
>
> ------------------------------------------------------------------
> From:Gunter Van De Velde <guntervandeveldecc=3D40icloud.com@dmarc.ietf.or=
g>
> Send Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B)=
 15:24
> To:Gaurav Dawra <gdawra.ietf@gmail.com>
> Cc:idr wg <idr@ietf.org>; lsvr-chairs <lsvr-chairs@ietf.org>;
> draft-xu-idr-neighbor-autodiscovery <
> draft-xu-idr-neighbor-autodiscovery@ietf.org>; Susan Hares <
> shares@ndzh.com>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
>
> LSVR realises that there is need for a neighbour and liveliness detection
> mechanism, and is making effort to understand the particular LSVR
> requirements for a solution.
>
> From a very high level perspective, there are few ways to address the
> aspect of LSVR peer discovery and liveliness detection:
> 1) Create something new
> 2) Extend something existing
> 3) Re-use something existing
>
> LSVR has no technology religion about any of these, and would like to
> progress with a solution space that most
> optimal answers the particular LSVR requirements.
>
> Within LSVR WG meeting at IETF102, there is time reserved to discuss abou=
t
> these matters, and if you feel interested, we could add this draft into t=
he
> agenda?
>
> Brgds,
> G/
>
>
>
>
>
> On 11 Jul 2018, at 19:39, Gaurav Dawra <gdawra.ietf@gmail.com> wrote:
>
> Hi Sue,
>
> Support.
>
> 1) Yes
> 2) Yes, BGP is most commonly used in most DCs. However, it may have
> applications beyond that.
> 3) yes, in order to simplify operations for DCs. Single CP is needed.
> 4) it should be reviewed by LSVR WG.
>
> Gaurav
>
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
>
> Greetings:
>
>
>
> This begins a 2 week WG adoption call for
> draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16).
>
>
>
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>
>
>
> The authors of this draft should send their IPR statements in response to
> this email.  I hope the authors will ihelp their vacationing co-authors t=
o
> respond by July 7th.
>
>
>
> The WG should consider the following:
>
> 1)      Does BGP need to have an autodiscovery mechanism for peers within
> Data Centers?
>
> 2)      Does this mechanism work for other deployments?
>
>
>
> 3)      If so, should be passed in BGP Hello message?
>
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>
>
>
> 4)      Does this interact with any of the LSVR work?
>
>
>
> I want to thank the authors for their patience while we sorted through
> some of the WG LC for other drafts.  We decided to wait until some of tho=
se
> discussion were cleared up prior to starting a new WG Adoption call.
>
>
>
>
>
> Susan Hares
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
>
>
>
>
>

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<div dir=3D"auto">Xiaohu,<div dir=3D"auto"><br></div><div dir=3D"auto">Even=
 most solid bag will break if you keep loading it with junk ....</div><div =
dir=3D"auto"><br></div><div dir=3D"auto">Best,</div><div dir=3D"auto">R.</d=
iv></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jul 12, 20=
18, 12:18 =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a href=3D"ma=
ilto:xiaohu.xxh@alibaba-inc.com">xiaohu.xxh@alibaba-inc.com</a>&gt; wrote:<=
br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;borde=
r-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-476884158852220483=
8__aliyun_email_body_block"><div style=3D"line-height:1.7;font-family:Tahom=
a,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><div style=3D"clear:=
both">Robert,</div><div style=3D"clear:both"><br></div><div style=3D"clear:=
both">Please see my response inline.</div><div class=3D"m_-4768841588522204=
838clear: m_-4768841588522204838both"><br></div><blockquote style=3D"margin=
-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma,Arial,STHeiti,SimS=
un;font-size:14.0px;color:#000000"><div class=3D"m_-4768841588522204838clea=
r: m_-4768841588522204838both">--------------------------------------------=
----------------------</div><div class=3D"m_-4768841588522204838clear: m_-4=
768841588522204838both">From:Robert Raszuk &lt;<a href=3D"mailto:robert@ras=
zuk.net" target=3D"_blank" rel=3D"noreferrer">robert@raszuk.net</a>&gt;</di=
v><div class=3D"m_-4768841588522204838clear: m_-4768841588522204838both">Se=
nd Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 17:=
58</div><div class=3D"m_-4768841588522204838clear: m_-4768841588522204838bo=
th">To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a href=3D"mailt=
o:xiaohu.xxh@alibaba-inc.com" target=3D"_blank" rel=3D"noreferrer">xiaohu.x=
xh@alibaba-inc.com</a>&gt;</div><div class=3D"m_-4768841588522204838clear: =
m_-4768841588522204838both">Cc:Idr &lt;<a href=3D"mailto:idr-bounces@ietf.o=
rg" target=3D"_blank" rel=3D"noreferrer">idr-bounces@ietf.org</a>&gt;; Gaur=
av Dawra &lt;<a href=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank" rel=
=3D"noreferrer">gdawra.ietf@gmail.com</a>&gt;; idr wg &lt;<a href=3D"mailto=
:idr@ietf.org" target=3D"_blank" rel=3D"noreferrer">idr@ietf.org</a>&gt;; l=
svr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" target=3D"_blank" re=
l=3D"noreferrer">lsvr-chairs@ietf.org</a>&gt;; draft-xu-idr-neighbor-autodi=
scovery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org"=
 target=3D"_blank" rel=3D"noreferrer">draft-xu-idr-neighbor-autodiscovery@i=
etf.org</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=
=3D"_blank" rel=3D"noreferrer">shares@ndzh.com</a>&gt;</div><div class=3D"m=
_-4768841588522204838clear: m_-4768841588522204838both">Subject:Re: [Idr] W=
G adoption call for draft-xu-idr-neighbor-autodiscovery</div><div class=3D"=
m_-4768841588522204838clear: m_-4768841588522204838both"><br></div><div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div class=3D"gmail_extra"><br><div class=3D"gmai=
l_quote">On Thu, Jul 12, 2018 at 11:32 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=
=B9=89=E5=85=88) <span>&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" ta=
rget=3D"_blank" rel=3D"noreferrer">xiaohu.xxh@alibaba-inc.com</a>&gt;</span=
> wrote:<br><div style=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,=
SimSun;font-size:14.0px;color:#000000;clear:both">What&#39;s LSVR in your m=
ind? isn&#39;t it built on the existing BGP code base?</div><div><br></div>=
<div><br></div><div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">No. Please see LSVR charter:=C2=A0</=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><b><span style=3D"font-=
family:PT Serif,Palatino,Neue Swift,serif;font-size:15.0px;background-color=
:#ffffff;text-decoration-style:initial;text-decoration-color:initial;float:=
none;display:inline">The LSVR protocol is intended as a self-standing routi=
ng protocol even if using existing BGP transport mechanisms and encodings, =
or if sharing the same transport session with other existing BGP address fa=
milies.<span>=C2=A0</span></span><br></b></div><br></div><div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">Here we are proposing even tighter dependency ... information in BGP =
Hellos to be critical element of LSVR operation. Today someone can very eas=
ily move LSVR transport to say TI-BGP proposed separated at the port level =
sessions.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">[Xiaoh=
u] Sorry that I don&#39;t much understand your points. Did you mean that so=
me information in the BGP Hello messages should be removed? If so, I&#39;m =
fully open to discuss with you about this.</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">But if you add even single hard attachment to BGP for =
LSVR like proposed TLVs it will become a hard anchor.=C2=A0</div></div><div=
><br></div><div>=C2=A0<br></div><div style=3D"line-height:1.7;font-family:T=
ahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000;clear:both">By th=
e way, have you heard any interest on this mechanism from users of the L2/L=
3VPN?:)<br></div><div><br></div><div><div class=3D"gmail_default" style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small">You missed it ... i=
t was not about their interest in LSVR or BGP Hellos ... it was about their=
 fear that something they do not need will impact them due to bugs.</div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">[Xiaohu] Oh, my god. Some BGP=
 users=C2=A0don&#39;t need multicast in their networks, should we stop defi=
ning BGP=C2=A0extensions for multicast due to the fears of potential bugs?<=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">Best regards,</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small">Xiaohu</div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">Cheers</div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div><br></=
div><div><br></div><div><br></div><div>=C2=A0</div><div style=3D"line-heigh=
t:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#00000=
0"><div style=3D"clear:both"><br></div><div style=3D"clear:both">Xiaohu</di=
v><div class=3D"m_-4768841588522204838m_-5621627023200128196clear: m_-47688=
41588522204838m_-5621627023200128196both"><br></div><div class=3D"m_-476884=
1588522204838m_-5621627023200128196clear: m_-4768841588522204838m_-56216270=
23200128196both">----------------------------------------------------------=
--------</div><div class=3D"m_-4768841588522204838m_-5621627023200128196cle=
ar: m_-4768841588522204838m_-5621627023200128196both">From:Robert Raszuk &l=
t;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank" rel=3D"noreferrer"=
>robert@raszuk.net</a>&gt;</div><div class=3D"m_-4768841588522204838m_-5621=
627023200128196clear: m_-4768841588522204838m_-5621627023200128196both">Sen=
d Time:2018=E5=B9=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 17:1=
3</div><div class=3D"m_-4768841588522204838m_-5621627023200128196clear: m_-=
4768841588522204838m_-5621627023200128196both">To:=E5=BE=90=E5=B0=8F=E8=99=
=8E(=E4=B9=89=E5=85=88) &lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" t=
arget=3D"_blank" rel=3D"noreferrer">xiaohu.xxh@alibaba-inc.com</a>&gt;</div=
><div class=3D"m_-4768841588522204838m_-5621627023200128196clear: m_-476884=
1588522204838m_-5621627023200128196both">Cc:Idr &lt;<a href=3D"mailto:idr-b=
ounces@ietf.org" target=3D"_blank" rel=3D"noreferrer">idr-bounces@ietf.org<=
/a>&gt;; Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf@gmail.com" target=
=3D"_blank" rel=3D"noreferrer">gdawra.ietf@gmail.com</a>&gt;; idr wg &lt;<a=
 href=3D"mailto:idr@ietf.org" target=3D"_blank" rel=3D"noreferrer">idr@ietf=
.org</a>&gt;; lsvr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" targe=
t=3D"_blank" rel=3D"noreferrer">lsvr-chairs@ietf.org</a>&gt;; draft-xu-idr-=
neighbor-autodiscovery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-autodisc=
overy@ietf.org" target=3D"_blank" rel=3D"noreferrer">draft-xu-idr-neighbor-=
autodiscovery@ietf.org</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@nd=
zh.com" target=3D"_blank" rel=3D"noreferrer">shares@ndzh.com</a>&gt;</div><=
div class=3D"m_-4768841588522204838m_-5621627023200128196clear: m_-47688415=
88522204838m_-5621627023200128196both">Subject:Re: [Idr] WG adoption call f=
or draft-xu-idr-neighbor-autodiscovery</div><div class=3D"m_-47688415885222=
04838m_-5621627023200128196clear: m_-4768841588522204838m_-5621627023200128=
196both"><br></div><div><div style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div><div style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">BGP code is a BGP code and regardless if this is ru=
nning on a router in the Internet or in the MSDC , regardless if it comes f=
rom vendor X, Y or Z it is the same code base.=C2=A0</div><div style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">It is *BAD*=C2=
=A0 idea to now glue BGP code base with LSVR. And this is first draft which=
 attempts do so in a very subtle manner by proposing two TLVs.=C2=A0</div><=
div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">I=
f we allow this to go through (because of sympathy to &quot;reuse existing&=
quot; approach) the consequences down the road will be rather ugly for all =
BGP based worlds (Internet, MSDC, but also enterprises with internal routin=
g, users of L2 and L3VPN etc ...).=C2=A0</div><div style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div><div style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</div><div style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div></d=
iv><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jul 12=
, 2018 at 11:06 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <span>&=
lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=3D"_blank" rel=3D"n=
oreferrer">xiaohu.xxh@alibaba-inc.com</a>&gt;</span> wrote:<br><div style=
=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0p=
x;color:#000000"><div style=3D"clear:both">Robert,</div><div style=3D"clear=
:both"><br></div><div style=3D"clear:both">The mechanism as described in th=
is draft is only targeted for the MSDC=C2=A0where RFC7938 has been enabled.=
 It&#39;s absolutely not targeted for the global routing system:)</div><div=
 style=3D"clear:both"><br></div><div style=3D"clear:both">Best regards,</di=
v><div style=3D"clear:both">Xiaohu</div><div class=3D"m_-476884158852220483=
8m_-5621627023200128196m_-875688759599363633clear: m_-4768841588522204838m_=
-5621627023200128196m_-875688759599363633both"><br></div><div class=3D"m_-4=
768841588522204838m_-5621627023200128196m_-875688759599363633clear: m_-4768=
841588522204838m_-5621627023200128196m_-875688759599363633both">-----------=
-------------------------------------------------------</div><div class=3D"=
m_-4768841588522204838m_-5621627023200128196m_-875688759599363633clear: m_-=
4768841588522204838m_-5621627023200128196m_-875688759599363633both">From:Ro=
bert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank" rel=
=3D"noreferrer">robert@raszuk.net</a>&gt;</div><div class=3D"m_-47688415885=
22204838m_-5621627023200128196m_-875688759599363633clear: m_-47688415885222=
04838m_-5621627023200128196m_-875688759599363633both">Send Time:2018=E5=B9=
=B47=E6=9C=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 17:00</div><div class=
=3D"m_-4768841588522204838m_-5621627023200128196m_-875688759599363633clear:=
 m_-4768841588522204838m_-5621627023200128196m_-875688759599363633both">To:=
=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a href=3D"mailto:xiaoh=
u.xxh@alibaba-inc.com" target=3D"_blank" rel=3D"noreferrer">xiaohu.xxh@alib=
aba-inc.com</a>&gt;</div><div class=3D"m_-4768841588522204838m_-56216270232=
00128196m_-875688759599363633clear: m_-4768841588522204838m_-56216270232001=
28196m_-875688759599363633both">Cc:Idr &lt;<a href=3D"mailto:idr-bounces@ie=
tf.org" target=3D"_blank" rel=3D"noreferrer">idr-bounces@ietf.org</a>&gt;; =
Gaurav Dawra &lt;<a href=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank"=
 rel=3D"noreferrer">gdawra.ietf@gmail.com</a>&gt;; idr wg &lt;<a href=3D"ma=
ilto:idr@ietf.org" target=3D"_blank" rel=3D"noreferrer">idr@ietf.org</a>&gt=
;; lsvr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org" target=3D"_blank=
" rel=3D"noreferrer">lsvr-chairs@ietf.org</a>&gt;; draft-xu-idr-neighbor-au=
todiscovery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.=
org" target=3D"_blank" rel=3D"noreferrer">draft-xu-idr-neighbor-autodiscove=
ry@ietf.org</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" tar=
get=3D"_blank" rel=3D"noreferrer">shares@ndzh.com</a>&gt;</div><div class=
=3D"m_-4768841588522204838m_-5621627023200128196h5"><div class=3D"m_-476884=
1588522204838m_-5621627023200128196m_-875688759599363633clear: m_-476884158=
8522204838m_-5621627023200128196m_-875688759599363633both">Subject:Re: [Idr=
] WG adoption call for draft-xu-idr-neighbor-autodiscovery</div><div class=
=3D"m_-4768841588522204838m_-5621627023200128196m_-875688759599363633clear:=
 m_-4768841588522204838m_-5621627023200128196m_-875688759599363633both"><br=
></div><div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:=
small"><br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small">And that is precisely what IMHO we should avoid.=C2=A0</div><di=
v style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Cle=
ar separation from BGP global routing and BGP as IGP including LSVR is:=C2=
=A0</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll"><br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">- extremely important for stability of the former=C2=A0</div><div =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">- very nee=
d for innovation and new features velocity of the latter=C2=A0</div><div st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><d=
iv style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</d=
iv><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.=
</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Th=
u, Jul 12, 2018 at 10:54 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88=
) <span>&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=3D"_blank"=
 rel=3D"noreferrer">xiaohu.xxh@alibaba-inc.com</a>&gt;</span> wrote:<br><di=
v style=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-siz=
e:14.0px;color:#000000"><div style=3D"clear:both">Hi Gunter,=C2=A0</div><di=
v style=3D"clear:both"><br></div><div style=3D"clear:both">Thanks for your =
email and suggestion. I believe the BGP peer discovery mechanism as describ=
ed in this draft is applicable to the use of BGP as IGP (<a href=3D"https:/=
/tools.ietf.org/html/rfc7938" target=3D"_blank" rel=3D"noreferrer">https://=
tools.ietf.org/html/rfc7938</a>) and LSVR as well.=C2=A0</div><div style=3D=
"clear:both"><br></div><div style=3D"clear:both">Ketan, one co-auhtor of th=
is draft would present this draft on the=C2=A0LSVR session.</div><div style=
=3D"clear:both"><br></div><div style=3D"clear:both">Best regards,</div><div=
 style=3D"clear:both">Xiaohu</div><div class=3D"m_-4768841588522204838m_-56=
21627023200128196m_-875688759599363633m_-9162836569949151362clear: m_-47688=
41588522204838m_-5621627023200128196m_-875688759599363633m_-916283656994915=
1362both"><br></div><div class=3D"m_-4768841588522204838m_-5621627023200128=
196m_-875688759599363633m_-9162836569949151362clear: m_-4768841588522204838=
m_-5621627023200128196m_-875688759599363633m_-9162836569949151362both">----=
--------------------------------------------------------------</div><div cl=
ass=3D"m_-4768841588522204838m_-5621627023200128196m_-875688759599363633m_-=
9162836569949151362clear: m_-4768841588522204838m_-5621627023200128196m_-87=
5688759599363633m_-9162836569949151362both">From:Gunter Van De Velde &lt;gu=
ntervandeveldecc=3D<a href=3D"mailto:40icloud.com@dmarc.ietf.org" target=3D=
"_blank" rel=3D"noreferrer">40icloud.com@dmarc.ietf.org</a>&gt;</div><div c=
lass=3D"m_-4768841588522204838m_-5621627023200128196m_-875688759599363633m_=
-9162836569949151362clear: m_-4768841588522204838m_-5621627023200128196m_-8=
75688759599363633m_-9162836569949151362both">Send Time:2018=E5=B9=B47=E6=9C=
=8812=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 15:24</div><div class=3D"m_-476=
8841588522204838m_-5621627023200128196m_-875688759599363633m_-9162836569949=
151362clear: m_-4768841588522204838m_-5621627023200128196m_-875688759599363=
633m_-9162836569949151362both">To:Gaurav Dawra &lt;<a href=3D"mailto:gdawra=
.ietf@gmail.com" target=3D"_blank" rel=3D"noreferrer">gdawra.ietf@gmail.com=
</a>&gt;</div><div class=3D"m_-4768841588522204838m_-5621627023200128196m_-=
875688759599363633m_-9162836569949151362clear: m_-4768841588522204838m_-562=
1627023200128196m_-875688759599363633m_-9162836569949151362both">Cc:idr wg =
&lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank" rel=3D"noreferrer">id=
r@ietf.org</a>&gt;; lsvr-chairs &lt;<a href=3D"mailto:lsvr-chairs@ietf.org"=
 target=3D"_blank" rel=3D"noreferrer">lsvr-chairs@ietf.org</a>&gt;; draft-x=
u-idr-neighbor-autodiscovery &lt;<a href=3D"mailto:draft-xu-idr-neighbor-au=
todiscovery@ietf.org" target=3D"_blank" rel=3D"noreferrer">draft-xu-idr-nei=
ghbor-autodiscovery@ietf.org</a>&gt;; Susan Hares &lt;<a href=3D"mailto:sha=
res@ndzh.com" target=3D"_blank" rel=3D"noreferrer">shares@ndzh.com</a>&gt;<=
/div><div class=3D"m_-4768841588522204838m_-5621627023200128196m_-875688759=
599363633m_-9162836569949151362clear: m_-4768841588522204838m_-562162702320=
0128196m_-875688759599363633m_-9162836569949151362both">Subject:Re: [Idr] W=
G adoption call for draft-xu-idr-neighbor-autodiscovery</div><div class=3D"=
m_-4768841588522204838m_-5621627023200128196m_-875688759599363633h5"><div c=
lass=3D"m_-4768841588522204838m_-5621627023200128196m_-875688759599363633m_=
-9162836569949151362clear: m_-4768841588522204838m_-5621627023200128196m_-8=
75688759599363633m_-9162836569949151362both"><br></div>LSVR realises that t=
here is need for a neighbour and liveliness detection mechanism, and is mak=
ing effort to understand the particular LSVR requirements for a solution.=
=C2=A0<div><br></div><div>From a very high level perspective, there are few=
 ways to address the aspect of LSVR peer discovery and liveliness detection=
:</div><div>1) Create something new</div><div>2) Extend something existing<=
/div><div>3) Re-use something existing</div><div><br><div>LSVR has no techn=
ology religion about any of these, and would like to progress with a soluti=
on space that most=C2=A0</div><div>optimal answers the particular LSVR requ=
irements.=C2=A0</div><div><br></div><div>Within LSVR WG meeting at IETF102,=
 there is time reserved to discuss about these matters, and if you feel int=
erested, we could add this draft into the agenda?</div><div><br></div><div>=
Brgds,</div><div>G/</div><div><br></div><div><br></div><div><br></div><div>=
<br></div><div><br><div>On 11 Jul 2018, at 19:39, Gaurav Dawra &lt;<a href=
=3D"mailto:gdawra.ietf@gmail.com" target=3D"_blank" rel=3D"noreferrer">gdaw=
ra.ietf@gmail.com</a>&gt; wrote:</div><br class=3D"m_-4768841588522204838m_=
-5621627023200128196m_-875688759599363633m_-9162836569949151362Apple-interc=
hange-newline"><div><div>Hi Sue,<div><br></div><div>Support.</div><div><br>=
</div><div>1) Yes</div><div>2) Yes, BGP is most commonly used in most DCs. =
However, it may have applications beyond that.</div><div>3) yes, in order t=
o simplify operations for DCs. Single CP is needed.</div><div>4) it should =
be reviewed by LSVR WG.</div><div><br></div><div>Gaurav</div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jul 2, 2018 at 10:08 AM=
, Susan Hares <span>&lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank=
" rel=3D"noreferrer">shares@ndzh.com</a>&gt;</span> wrote:<br><div class=3D=
"m_-4768841588522204838m_-5621627023200128196m_-875688759599363633m_-916283=
6569949151362m_5148942973323166637WordSection1"><p class=3D"MsoNormal" styl=
e=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0p=
x">Greetings: </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-t=
op:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNo=
rmal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-=
bottom:.0px">This begins a 2 week WG adoption call for draft-xu-idr-neighbo=
r-autodiscovery (July 2 =E2=80=93 July 16).=C2=A0 </p><p class=3D"MsoNormal=
" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bott=
om:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-=
top:.0px;margin-bottom:.0px;padding-bottom:.0px"><a href=3D"https://datatra=
cker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/" target=3D"_blank" r=
el=3D"noreferrer">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-au=
todiscovery/</a></p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding=
-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"Mso=
Normal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;paddin=
g-bottom:.0px">The authors of this draft should send their IPR statements i=
n response to this email.=C2=A0 I hope the authors will ihelp their vacatio=
ning co-authors to respond by July 7<sup>th</sup>.=C2=A0 </p><p class=3D"Ms=
oNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;paddi=
ng-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"margin-top:.0px;p=
adding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">The WG should consi=
der the following: </p><p class=3D"m_-4768841588522204838m_-562162702320012=
8196m_-875688759599363633m_-9162836569949151362m_5148942973323166637MsoList=
Paragraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;pad=
ding-bottom:.0px"><span>1)<span style=3D"font-style:normal;font-variant-cap=
s:normal;font-weight:normal;font-stretch:normal;font-size:9.0px;line-height=
:normal;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span>=
</span>Does BGP need to have an autodiscovery mechanism for peers within Da=
ta Centers? </p><p class=3D"m_-4768841588522204838m_-5621627023200128196m_-=
875688759599363633m_-9162836569949151362m_5148942973323166637MsoListParagra=
ph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bo=
ttom:.0px"><span>2)<span style=3D"font-style:normal;font-variant-caps:norma=
l;font-weight:normal;font-stretch:normal;font-size:9.0px;line-height:normal=
;font-family:Times New Roman">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>=
Does this mechanism work for other deployments? </p><p class=3D"m_-47688415=
88522204838m_-5621627023200128196m_-875688759599363633m_-916283656994915136=
2m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;padding-to=
p:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"m_-476=
8841588522204838m_-5621627023200128196m_-875688759599363633m_-9162836569949=
151362m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;paddi=
ng-top:.0px;margin-bottom:.0px;padding-bottom:.0px"><span>3)<span style=3D"=
font-style:normal;font-variant-caps:normal;font-weight:normal;font-stretch:=
normal;font-size:9.0px;line-height:normal;font-family:Times New Roman">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>If so, should be passed in BGP He=
llo message?=C2=A0 </p><p class=3D"m_-4768841588522204838m_-562162702320012=
8196m_-875688759599363633m_-9162836569949151362m_5148942973323166637MsoList=
Paragraph" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;pad=
ding-bottom:.0px">Or should it be a part of another protocol (e.g. LLDP, BF=
D, etc). </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0=
px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"m_-4768841=
588522204838m_-5621627023200128196m_-875688759599363633m_-91628365699491513=
62m_5148942973323166637MsoListParagraph" style=3D"margin-top:.0px;padding-t=
op:.0px;margin-bottom:.0px;padding-bottom:.0px"><span>4)<span style=3D"font=
-style:normal;font-variant-caps:normal;font-weight:normal;font-stretch:norm=
al;font-size:9.0px;line-height:normal;font-family:Times New Roman">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 </span></span>Does this interact with any of the L=
SVR work? </p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.=
0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal=
" style=3D"margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bott=
om:.0px">I want to thank the authors for their patience while we sorted thr=
ough some of the WG LC for other drafts.=C2=A0 We decided to wait until som=
e of those discussion were cleared up prior to starting a new WG Adoption c=
all.</p><span style=3D"color:#888888"><p class=3D"MsoNormal" style=3D"margi=
n-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">=C2=A0<=
/p><p class=3D"MsoNormal" style=3D"margin-top:.0px;padding-top:.0px;margin-=
bottom:.0px;padding-bottom:.0px">=C2=A0</p><p class=3D"MsoNormal" style=3D"=
margin-top:.0px;padding-top:.0px;margin-bottom:.0px;padding-bottom:.0px">Su=
san Hares </p></span></div><br>____________________________________________=
___<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank" rel=
=3D"noreferrer">Idr@ietf.org</a><br><a href=3D"https://www.ietf.org/mailman=
/listinfo/idr" target=3D"_blank" rel=3D"noreferrer">https://www.ietf.org/ma=
ilman/listinfo/idr</a><br><br></div><br></div></div>_______________________=
________________________<br>Idr mailing list<br><a href=3D"mailto:Idr@ietf.=
org" target=3D"_blank" rel=3D"noreferrer">Idr@ietf.org</a><br><a href=3D"ht=
tps://www.ietf.org/mailman/listinfo/idr" target=3D"_blank" rel=3D"noreferre=
r">https://www.ietf.org/mailman/listinfo/idr</a><br></div></div><br></div><=
/div><div style=3D"line-height:20.0px;clear:both"><br></div></div><br>_____=
__________________________________________<br>
Idr mailing list<br><a href=3D"mailto:Idr@ietf.org" target=3D"_blank" rel=
=3D"noreferrer">Idr@ietf.org</a><br><a href=3D"https://www.ietf.org/mailman=
/listinfo/idr" target=3D"_blank" rel=3D"noreferrer">https://www.ietf.org/ma=
ilman/listinfo/idr</a><br><br></div><br></div></div><div style=3D"line-heig=
ht:20.0px;clear:both"><br></div></div></div><br></div><div style=3D"line-he=
ight:20.0px;clear:both"><br></div></div></div><br></div></div></blockquote>=
<div style=3D"line-height:20.0px;clear:both"><br></div></div></div></blockq=
uote></div>

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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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While I think a BGP neighbor auto-discovery protocol would be useful in 
certain scenarios, I don't think the WG should adopt this document at 
the current time.

There is so much overlap with the idr-lldp-peer-discovery draft that I 
don't see how the WG could adopt both of them.Â  The 
idr-neighbor-autodiscovery draft thus should not be adopted unless the 
intention is to reject the idr-lldp-peer discovery draft. Is that the 
intention?Â  I don't recall seeing much discussion comparing and 
contrasting the two.

For neighbor auto-discovery, I'd think that the biggest issue by far 
would be security.Â  All this draft really suggests about security is 
"don't use this in any environment where it is possible for the Hellos 
to be spoofed".Â Â  A somewhat more detailed set of applicability 
restrictions would seem to be warraned.

The draft does propose to use the Generalized TTL Security Mechanism on 
the BGP sessions established as a result of receiving Hellos, but 
doesn't seem to suggest using the GTSM on the Hellos themselves. Either 
way, whether GTSM actually provides any signficant amount of security 
would have to be examined.

Even if there's no need for security in DC networks, what will happen 
when someone uses this to auto-discover neighbors on, e.g., an EVPN 
Broadcast Domain or other overlay.Â  Also, someone will want to use 
scoped IP multicast to allow the Hellos go to several hops, in order to 
auto-discover multi-hop EBGP peers.Â  (Compare to Targeted LDP Hellos.)Â  
Are these possible use cases supposed to be prohibited?Â  How?Â  Is there 
even an analysis of DC networking security needs?

I'm a little surprised to see LDP Hellos held up as model of something 
that is proven to work well.Â  In LDP, the Hello stuff is really a major 
complication (one might even say "a big mess"), because you have both 
"Hello adjacencies" and "session adjacencies", and you have to handle 
all the possible interactions between them. At least the LDP Hello stuff 
is an integral part of the LDP state machine; this sort of relationship 
between state machines is not really discussed in the 
idr-neighbor-autodiscovery draft.

LDP Hellos are also a known security problem (especially, but not only, 
when targeted to non-neighboring nodes).Â  In fact Targeted LDP Hellos 
provide no value other than to create an attack vector. However, it is 
hard to remove the Targeted Hellos because the Hello mechanism is such 
an integral part of the LDP state machine.Â  We should make sure we don't 
drive BGP down the same road.

The competition between BGP keepalives and periodic Hellos for deciding 
whether to bring the session down is also a potential source of problems 
that needs to be discussed.

It is interesting that routes are automatically created due to receipt 
of Hellos.Â  But the talk of giving these routes a smaller admin distance 
than certain other routes is a bit scary.Â  Attempts to adjust the admin 
distance never seem to work quite right, and frequently have unintended 
side-effects.Â  Also, there's very little protection against having 
several mechanisms that each create routes under the assumption that 
their own routes will have a smaller admin distance than any other.

I'm surprised to see the Hellos carrying a list of ASNs from which the 
transmitter will accept connections.Â  Isn't that a little like saying "I 
won't let you log in unless you type one of the following passwords"?

Something needs to be said about interaction with existing BGP security 
measures (TCP-MD5), such as they are.

My take on Sue's questions would be:

> 1) Does BGP need to have an autodiscovery mechanism for peers within Data 
Centers?

An autodiscovery mechanism certainly seems useful.Â  However, its use 
needs to be carefully restricted, and the applicability restrictions 
needs to be very clearly stated.

 > 2) Does this mechanism work for other deployments?

Unknown.Â  It's somewhat surprising that this issue is not even addressed 
in the draft.

 >3) If so, should be passed in BGP Hello message?Â  Or should it be a 
part of another protocol (e.g. LLDP, BFD, etc).

Unknown.Â  It's somewhat surprising that this issue is not even addressed 
in the draft.

BTW, it's not at all clear whether the "BGP Hello" mechanism can be 
regarded as part of the BGP protocol.Â  It seems like a brand new 
UDP-based mechanism, and adding it doesn't seem to be any simpler than 
adding a more generic neighbor discovery protocol.

In the DC, one could also ask whether whatever procedure is used to tell 
a node what its IP address is should not also be used to tell it who its 
BGP neighbors are.

 > 4)Does this interact with any of the LSVR work?

Unknown.Â  It's somewhat surprising that this issue is not even addressed 
in the draft.

I think more work needs to be done on the draft before we can really 
evaluate whether it is a good basis for future work.




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    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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    While I think a BGP neighbor auto-discovery protocol would be useful
    in certain scenarios, I don't think the WG should adopt this
    document at the current time.<br>
    <br>
    There is so much overlap with the idr-lldp-peer-discovery draft that
    I don't see how the WG could adopt both of them.Â  The
    idr-neighbor-autodiscovery draft thus should not be adopted unless
    the intention is to reject the idr-lldp-peer discovery draft.
    Is that the intention?Â  I don't recall seeing much discussion
    comparing and contrasting the two.<br>
    <br>
    For neighbor auto-discovery, I'd think that the biggest issue by far
    would be security.Â  All this draft really suggests about security is
    "don't use this in any environment where it is possible for the
    Hellos to be spoofed".Â Â  A somewhat more detailed set of
    applicability restrictions would seem to be warraned.<br>
    <br>
    The draft does propose to use the Generalized TTL Security Mechanism
    on the BGP sessions established as a result of receiving Hellos, but
    doesn't seem to suggest using the GTSM on the Hellos themselves.Â 
    Either way, whether GTSM actually provides any signficant amount of
    security would have to be examined.<br>
    <br>
    Even if there's no need for security in DC networks, what will
    happen when someone uses this to auto-discover neighbors on, e.g.,
    an EVPN Broadcast Domain or other overlay.Â  Also, someone will want
    to use scoped IP multicast to allow the Hellos go to several hops,
    in order to auto-discover multi-hop EBGP peers.Â  (Compare to
    Targeted LDP Hellos.)Â  Are these possible use cases supposed to be
    prohibited?Â  How?Â  Is there even an analysis of DC networking
    security needs?<br>
    <br>
    I'm a little surprised to see LDP Hellos held up as model of
    something that is proven to work well.Â  In LDP, the Hello stuff is
    really a major complication (one might even say "a big mess"),
    because you have both "Hello adjacencies" and "session adjacencies",
    and you have to handle all the possible interactions between them.Â 
    At least the LDP Hello stuff is an integral part of the LDP state
    machine; this sort of relationship between state machines is not
    really discussed in the idr-neighbor-autodiscovery draft.<br>
    <br>
    LDP Hellos are also a known security problem (especially, but not
    only, when targeted to non-neighboring nodes).Â  In fact Targeted LDP
    Hellos provide no value other than to create an attack vector.Â 
    However, it is hard to remove the Targeted Hellos because the Hello
    mechanism is such an integral part of the LDP state machine.Â  We
    should make sure we don't drive BGP down the same road.<br>
    <br>
    The competition between BGP keepalives and periodic Hellos for
    deciding whether to bring the session down is also a potential
    source of problems that needs to be discussed.Â  <br>
    <br>
    It is interesting that routes are automatically created due to
    receipt of Hellos.Â  But the talk of giving these routes a smaller
    admin distance than certain other routes is a bit scary.Â  Attempts
    to adjust the admin distance never seem to work quite right, and
    frequently have unintended side-effects.Â  Also, there's very little
    protection against having several mechanisms that each create routes
    under the assumption that their own routes will have a smaller admin
    distance than any other.
    <br>
    <br>
    I'm surprised to see the Hellos carrying a list of ASNs from which
    the transmitter will accept connections.Â  Isn't that a little like
    saying "I won't let you log in unless you type one of the following
    passwords"?<br>
    <br>
    Something needs to be said about interaction with existing BGP
    security measures (TCP-MD5), such as they are.<br>
    Â 
    <br>
    My take on Sue's questions would be:<br>
    <br>
    <span style="mso-list:Ignore">&gt; 1) </span>Does BGP need to have
    an autodiscovery mechanism for peers within Data Centers?<br>
    <br>
    An autodiscovery mechanism certainly seems useful.Â  However, its use
    needs to be carefully restricted, and the applicability restrictions
    needs to be very clearly stated. <br>
    <br>
    &gt; 2) Does this mechanism work for other deployments? <br>
    <br>
    Unknown.Â  It's somewhat surprising that this issue is not even
    addressed in the draft.<br>
    <br>
    &gt;<span style="mso-list:Ignore"> 3)Â <span style="font:7.0pt
        &quot;Times New Roman&quot;"> </span></span><span dir="LTR"></span>If
    so, should be passed in BGP Hello message?Â  Or should it be a part
    of another protocol (e.g. LLDP, BFD, etc).<br>
    <br>
    Unknown.Â  It's somewhat surprising that this issue is not even
    addressed in the draft.Â  <br>
    <br>
    BTW, it's not at all clear whether the "BGP Hello" mechanism can be
    regarded as part of the BGP protocol.Â  It seems like a brand new
    UDP-based mechanism, and adding it doesn't seem to be any simpler
    than adding a more generic neighbor discovery protocol.<br>
    <br>
    In the DC, one could also ask whether whatever procedure is used to
    tell a node what its IP address is should not also be used to tell
    it who its BGPÂ 
    neighbors are.<br>
    <br>
    &gt; 4)<span style="mso-list:Ignore"><span style="font:7.0pt
        &quot;Times New Roman&quot;">Â Â  </span></span><span dir="LTR"></span>Does
    this interact with any of the LSVR work?<br>
    <br>
    Unknown.Â  It's somewhat surprising that this issue is not even
    addressed in the draft.<br>
    <br>
    I think more work needs to be done on the draft before we can really
    evaluate whether it is a good basis for future work.<br>
    <br>
    <br>
    <br>
  </body>
</html>

--------------C938491F718AAC7BA07682D3--


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From: "Krishna Muddenahally Ananthamurthy (kriswamy)" <kriswamy@cisco.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Thu, 12 Jul 2018 17:32:55 +0000
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--_000_6DE7FB7200874F36BEF7C58E82E0A00Cciscocom_--


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Subject: [Idr] Feedback on 5575-bis
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As I promised Sue, I've done a thorough re-read of draft-ietf-idr-rfc5575bis.
This re-read was partially prompted by recent work in my employer's
implementation so this was very fresh.

Here are my comments:

:   A Flow Specification received from an external autonomous system will
:   need to be validated against unicast routing before being accepted.
:   If the aggregate traffic flow defined by the unicast destination
:   prefix is forwarded to a given BGP peer, then the local system can
:   safely install more specific flow rules that may result in different
:   forwarding behavior, as requested by this system.

Issue: Redirections may need additional scrutiny.  While the destination
based check on the received unicast routing is good, it's still possible for
the external AS to influence forwarding beyond "rate-limit/drop" if scrutiny
is not given to the other control communities.  This issue is compounded
with the redirect-ip feature, not in this document.

I'd suggest this be mentioned in an operational security considerations
section.

:   In many deployments of BGP Flow Specification, the Flow Specification
:   information has replace existing host length route advertisements.

s/replace/replaced/.  Also, it's unclear in the context of this paragraph
why this is interesting.  A bit of explanatory text explaining the use of
such most-specific routes for redirecting traffic would be useful.

:   Experience with previous BGP extensions has also shown that the
:   maximum capacity of BGP speakers has been gradually increased
:   according to expected loads.  Taking into account Internet unicast
:   routing as well as additional applications as they gain popularity.

The last sentence is dangling.

:   Flow Specification components must follow strict type ordering by
:   increasing numerical order.  A given component type may (exactly
:   once) or may not be present in the specification.  If present, it
:   MUST precede any component of higher numeric type value.

... and what if they don't?  Is it malformed?  Should the implementation
attempt to re-order?

:   All combinations of component types within a single NLRI are allowed,
:   even if the combination makes no sense from a semantical perspective.
:   If a given component type within a prefix in unknown, the prefix in
:   question cannot be used for traffic filtering purposes by the
:   receiver.  Since a Flow Specification has the semantics of a logical
:   AND of all components, if a component is FALSE, by definition it
:   cannot be applied.  However, for the purposes of BGP route
:   propagation, this prefix should still be transmitted since BGP route
:   distribution is independent on NLRI semantics.

The issue here is when we encounter an unknown component, we can no longer
verify the syntactic correctness of the NLRI.  This means we will pass
potentially invalid entries downstream.  Downstream receivers must thus not
drop the session, but should use treat-as-withdraw semantics.

This issue in validation, as I tersely noted in a prior IDR thread, really
needs discussion in the document.  It impacts the ability to verify, to add
new component types, and potentially cause invalid NLRI to propagate
downstream.

:   The <type, value> encoding is chosen in order to allow for future
:   extensibility.

It should be mentioned that due to the property above that extensions are
problematic.

4.2.3:
:     0   1   2   3   4   5   6   7
:   +---+---+---+---+---+---+---+---+
:   | e | a |  len  | 0 |lt |gt |eq |
:   +---+---+---+---+---+---+---+---+
:
:        Numeric operator

The 0 field is unclear what the expected behavior is when it's NOT zero.

:      a - AND bit.  If unset, the previous term is logically ORed with
:      the current one.  If set, the operation is a logical AND.  It
:      should be unset in the first operator byte of a sequence.  The AND
:      operator has higher priority than OR for the purposes of
:      evaluating logical expressions.

It's not clear what should be done if AND is set in the first list entry.

:      len - length of the value field for this operand encodes 1 (00) -
:      4 (11) bytes.  Type 3 flow component values are always encoded as
:      single byte (len = 00).

"always encoded" begs the question about what to do when it isn't.  Being
encoded as 4 bytes of length but a length of 1 is still correct, e.g.  Does
Postel's maxim apply here?

4.2.4
:      Defines a list of {operator, value} pairs that matches source OR
:      destination TCP/UDP ports.  This list is encoded using the numeric
:      operator format defined in Section 4.2.3.  Values are encoded as
:      1- or 2-byte quantities.

It's not clear what to do if the encoding is > 2 byte.  Ditto for sections
4.2.5, 4.2.6, etc.

4.2.9 has a similar "must be zero" set of bits that need to have their
behavior specified.

4.2.11
:      Defines a list of {operator, value} pairs used to match the 6-bit
:      DSCP field [RFC2474].  This list is encoded using the numeric
:      operator format defined in Section 4.2.3.  Values are encoded
:      using a single byte.  The two most significant bits are zero and
:      the six least significant bits contain the DSCP value.

It's not specified what to do when the top two bits are set.

4.2.12
:    +---+---+---+---+---+---+---+---+
:    |   Reserved    |LF |FF |IsF|DF |
:    +---+---+---+---+---+---+---+---+
:
:      Bitmask values:
:
:         Bit 7 - Don't fragment (DF)
:
:         Bit 6 - Is a fragment (IsF)
:
:         Bit 5 - First fragment (FF)
:
:         Bit 4 - Last fragment (LF)


While the general behavior of unexpected lengths is already unclear, it's
even less clear here.  

Reserved behavior is not defined.  "Must be zero on transmit, should be zero
on receive?"

It's also not specified whether this is "any of" or not.  This impacts
whether multiple bits being set is valid for some combinations.

5.

:   filtering (prevention of traffic-based, denial-of-service (DOS)
:   attacks, traffic filtering in the context of BGP/MPLS VPN service,
:   and centralized traffic control for SDN/NFV networks) requires

The separate clauses here likely need to be semicolon separated since the
first clause is a compound separated by a comma.  Alternatively leave to the
RFC editor to straight it out.

:   Section 8 has details on the limitation
:   of previous mechanisms and why BGP Flow Specification version 1
:   provides a solution for to prevent DOS and aid BGP/MPLS VPN filtering
:   rules.

I think this is the first time in the document this is referred to as v1 of
the spec.

:   This Flow Specification NLRI defined above to convey information
:   about traffic filtering rules for traffic that should be discarded or
:   handled in manner specified by a set of pre-defined actions (which
:   are defined in BGP Extended Communities).  This mechanism is
:   primarily designed to allow an upstream autonomous system to perform
:   inbound filtering in their ingress routers of traffic that a given
:   downstream AS wishes to drop.

There's several bits of awkwardness in the above paragraph.  But among them
is the presumption of drop being the default choice in the last sentence.

5.1
:   The relative order of two Flow Specification rules is determined by
:   comparing their respective components.  The algorithm starts by
:   comparing the left-most components of the rules. 

The importance of whether the components are sorted becomes critical here.
Given the semantic ambiguity of components the receiver is unable to decode
(unknown), the length check also can't be applied here.  This is mostly
important for likely buggy cases where two NLRI are semantically identical
but mis-ordered.  Compare vs. the RFC 3107 withdraw ambiguities for label
value some time ago.

A trite example is consider two NLRI both containing the type 4 port field,
both containing the same 1-byte value (e.g. 255), but one encoded using a
single byte of length, the other with two bytes of length.  Is this an
implicit update or not?

Somewhat similarly, duplicate components aren't specifically called out, but
potentially implied (as noted in an IDR exchange) by the requirements of the
sort order.  Exactly what the behavior is in the face of duplicates should
be specified.

6.
:   The underlying concept is that the neighboring AS that advertises the
:   best unicast route for a destination is allowed to advertise flow-
:   spec information that conveys a more or equally specific destination
:   prefix.  Thus, as long as there are no more specific unicast routes,
:   received from a different neighboring AS, which would be affected by
:   that filtering rule.


Observation: An address space hijack that is not filtered, e.g.
advertisement of a more specific route, may prevent inter-as flowspec from
validating.  This might be worth putting in the operational considerations
section.

7.
:   Multiple traffic actions may be present for a single NLRI.  The
:   traffic actions are processed in ascending order of the sub-type
:   found in the BGP Extended Communities.  If not all of them can be
:   processed the filter SHALL NOT be applied at all (for example: if for
:   a given flow there are the action communities rate-limit-bytes and
:   traffic-marking attached, and the plattform does not support one of
:   them also the other shall not be applied for that flow).

Typo on platform.
The extended communities defined are not only a given sub-type, but also a
type field.  The above suggestion is ambiguous about the case where the
subtypes are equal but the types are distinct.

I'm also wondering if the "applied at all" is the desired wording.  Does
that mean, as earlier presented in the draft, we get:

:   The default action for a traffic filtering Flow Specification is to
:   accept IP traffic that matches that particular rule.

Or does it mean that the rule is ignored?  The implications are different: A
pass permits traffic to pass whereas ignore is effectively a "delete rule",
which may cause traffic that would otherwise pass the filter to be impacted
differently by subsequent rules.

7.1
:   The remaining 4 octets carry the maximum rate information in IEEE
:   floating point [IEEE.754.1985] format, units being bytes per second.
:   A traffic-rate of 0 should result on all traffic for the particular
:   flow to be discarded.

It is worth noting that while we could simply end up with preposterously
large numbers, there is also the edge case that these floating point values
may be NEGATIVE.  The draft may wish to note that negative numbers should be
one of: ignored (see prior comment about how this impacts rule order), or
treated as zero (discard)

7.2
See 7.1

7.4
There's a level of ambiguity in what happens when there's more than one
redirect extended community:

:   Interferes with: All other redirect functions.  All redirect                                     
:   functions are mutually exclusive.  If this redirect function exists,
:   then no other redirect functions can be processed.

We're allowed to install to any VRF:
:   If several local instances match this criteria,
:   the choice between them is a local matter

but this is partially also interacting with the text from earlier:
:   Multiple traffic actions may be present for a single NLRI.  The
:   traffic actions are processed in ascending order of the sub-type
:   found in the BGP Extended Communities.  If not all of them can be
:   processed the filter SHALL NOT be applied at all

So, consider the case where we have two redirect extended communities.  If
one of them does not have any matching VRFs, should the "SHALL NOT be
applied at all" kick in?  If both can be used, do we pick the first as
implied by ascending order?  Or do we take a wider reading of the 7.4 text
and let the implementation just pick one?

This indirectly raises a different point: For each of the action communities
that aren't expected to allow multiple instances, how do you deal with the
repeats?  E.g. two traffic-rate extended communities?

7.6 covers the fact that only a single redirect community can be associated
with a flowspec.  However, given that some routers may have target:A working
but not target:B and vice versa elsewhere, we shouldn't necessarily restrict
this.  

7.6.1 illustrates the idea that they are a conflict that should be treated
as withdraw.  I believe this is not the desired behavior.

9.2 Another reference to this being version 1.

13.
s/MuPedro/Pedro/

-- Jeff


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From: Jeffrey Haas <jhaas@pfrc.org>
To: Eric C Rosen <erosen@juniper.net>
Cc: Susan Hares <shares@ndzh.com>, idr@ietf.org, draft-xu-idr-neighbor-autodiscovery@ietf.org
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On Thu, Jul 12, 2018 at 10:35:12AM -0400, Eric C Rosen wrote:
> There is so much overlap with the idr-lldp-peer-discovery draft that
> I don't see how the WG could adopt both of them.  The
> idr-neighbor-autodiscovery draft thus should not be adopted unless
> the intention is to reject the idr-lldp-peer discovery draft. Is
> that the intention?  I don't recall seeing much discussion comparing
> and contrasting the two.

And not contradicting any of Eric's other good points, we have other work
happening outside of IDR that overlaps this auto discovery problem space:

https://datatracker.ietf.org/doc/draft-acee-ospf-bgp-rr/

Easy to say that it's a popular topic. :-)

-- Jeff


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--0000000000003259210570d4204c
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Very good point Jeff - thx for bringing this one up too in this context.

One thing however in this entire thread is very blurry and mixed line
between what is useful for BGP itself and what is specifically useful for
the cases of BGP deployments in MSDCs.

The fundamental reason why Petr shared the idea of using BGP in large scale
DCs was redundant flooding reduction of native link state protocols as well
as lowest common denominator across OEM vendors supporting high speed L3
switches/routers for DC fabric.

With that let's face it .. there is perhaps only handful of MSDCs in the
world which technically still needs to use BGP as dynamic reachability
protocol. Rest of them would be much better using either:

* native link state protocols possibly with proposed by Tony Li flooding
reduction
* native link state protocols possibly with proposed by Naiming flooding
optimizations for DCs
* Russ's proposal for ISIS in openfabric
* (apologies if I missed any other work here)

and for those really brave:

* run RIFT

If folks having 10 or 100 or 1000 nodes in the spine of their DCs don't
want to feel any smaller the FB or MS or Amazon I think they are just fine
to either run BGP as is or be most advanced and support fork of BGP to be
focused on DCs - call it DC-BGP which would run different code base then
real WAN BGP optimized for small and medium data centers fabrics and would
includ use of different TCP ports. LSVR could be placed in that category.

Thx,
R.

PS, Most of configuration tasks in any well operated network is all
automated. I am missing the real practical need for any auto-configuration
or auto-discovery enhancements for real data centers where provisioning
tool is in place. Is this for Wild Wild West type of fabrics where spine or
super spine or TORs get mounted and connected at random then someone
expects that turning it on is all what is needed to improve the fabric's
bandwidth ?


On Thu, Jul 12, 2018 at 10:03 PM, Jeffrey Haas <jhaas@pfrc.org> wrote:

> On Thu, Jul 12, 2018 at 10:35:12AM -0400, Eric C Rosen wrote:
> > There is so much overlap with the idr-lldp-peer-discovery draft that
> > I don't see how the WG could adopt both of them.  The
> > idr-neighbor-autodiscovery draft thus should not be adopted unless
> > the intention is to reject the idr-lldp-peer discovery draft. Is
> > that the intention?  I don't recall seeing much discussion comparing
> > and contrasting the two.
>
> And not contradicting any of Eric's other good points, we have other work
> happening outside of IDR that overlaps this auto discovery problem space:
>
> https://datatracker.ietf.org/doc/draft-acee-ospf-bgp-rr/
>
> Easy to say that it's a popular topic. :-)
>
> -- Jeff
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

--0000000000003259210570d4204c
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Very good =
point Jeff - thx for bringing this one up too in this context.=C2=A0</div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small">One thing however in this en=
tire thread is very blurry and mixed line between what is useful for BGP it=
self and what is specifically useful for the cases of BGP deployments in MS=
DCs.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small">The fundame=
ntal reason why Petr shared the idea of using BGP in large scale DCs was re=
dundant flooding reduction of native link state protocols as well as lowest=
 common denominator across OEM vendors supporting high speed L3 switches/ro=
uters for DC fabric.=C2=A0</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all">With that let&#39;s face it .. there is perhaps only handful of MSDCs =
in the world which technically still needs to use BGP as dynamic reachabili=
ty protocol. Rest of them would be much better using either:=C2=A0</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small">* native link state protocols =
possibly with proposed by Tony Li flooding reduction</div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">* native link state protocols possibly with proposed by Naiming flooding =
optimizations for DCs</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">* Russ&#39;s proposal for ISI=
S in openfabric=C2=A0</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">* (apologies if I missed any =
other work here)</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">and f=
or those really brave:=C2=A0</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">* run RIFT</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">If=
 folks having 10 or 100 or 1000 nodes in the spine of their DCs don&#39;t w=
ant to feel any smaller the FB or MS or Amazon I think they are just fine t=
o either run BGP as is or be most advanced and support fork of BGP to be fo=
cused on DCs - call it DC-BGP which would run different code base then real=
 WAN BGP optimized for small and medium data centers fabrics and would incl=
ud use of different TCP ports. LSVR could be placed in that category.=C2=A0=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small">PS, Most of configuration tasks =
in any well operated network is all automated. I am missing the real practi=
cal need for any auto-configuration or auto-discovery enhancements for real=
 data centers where provisioning tool is in place. Is this for=C2=A0Wild Wi=
ld West type of fabrics where spine or super spine or TORs get mounted and =
connected at random then someone expects that turning it on is all what is =
needed to improve the fabric&#39;s bandwidth ?=C2=A0</div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
"><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"=
>On Thu, Jul 12, 2018 at 10:03 PM, Jeffrey Haas <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:jhaas@pfrc.org" target=3D"_blank">jhaas@pfrc.org</a>&gt;</span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex"><span class=3D"">On Thu, Jul 12,=
 2018 at 10:35:12AM -0400, Eric C Rosen wrote:<br>
&gt; There is so much overlap with the idr-lldp-peer-discovery draft that<b=
r>
&gt; I don&#39;t see how the WG could adopt both of them.=C2=A0 The<br>
&gt; idr-neighbor-autodiscovery draft thus should not be adopted unless<br>
&gt; the intention is to reject the idr-lldp-peer discovery draft. Is<br>
&gt; that the intention?=C2=A0 I don&#39;t recall seeing much discussion co=
mparing<br>
&gt; and contrasting the two.<br>
<br>
</span>And not contradicting any of Eric&#39;s other good points, we have o=
ther work<br>
happening outside of IDR that overlaps this auto discovery problem space:<b=
r>
<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-acee-ospf-bgp-rr/" rel=3D=
"noreferrer" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draft-=
acee-ospf-bgp-rr/</a><br>
<br>
Easy to say that it&#39;s a popular topic. :-)<br>
<br>
-- Jeff<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
</div></div></blockquote></div><br></div>

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From: Tony Przygienda <tonysietf@gmail.com>
Date: Thu, 12 Jul 2018 15:00:08 -0700
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To: Robert Raszuk <robert@raszuk.net>
Cc: Jeffrey Haas <jhaas@pfrc.org>, idr wg <idr@ietf.org>,  draft-xu-idr-neighbor-autodiscovery@ietf.org, Sue Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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>
> and for those really brave:
>
> * run RIFT
>
>
You probably meant to say "for those who actually want to be able to run
something that exists". For people interested in code I can encourage
hackathon102 participation. We're aiming to got a first interop hello 3-way
up and probably ZTP :-P

Gee, that used to be all "rough consensus and running code". One got
definitiely more contentious and the other gets harder and harder to find
these days ...

Otherwise, on the issue, unsurprisingly, I fully concur with Eric,
especially it maybe quite enlightening to go through a small exercise of
trying to extend the BGP neighbor FSM with the suggested change  ...

thanks

--- tony

--000000000000b876de0570d47e36
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<div dir=3D"ltr"><br><div class=3D"gmail_quote"><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex"><div dir=3D"ltr"><div style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">and for those really brave:=C2=A0</div><div style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small"><br></div><div style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">* run RIFT</div=
><br></div></blockquote><div><br></div><div>You probably meant to say &quot=
;for those who actually want to be able to run something that exists&quot;.=
 For people interested in code I can encourage hackathon102 participation. =
We&#39;re aiming to got a first interop hello 3-way up and probably ZTP :-P=
<br><br></div><div>Gee, that used to be all &quot;rough consensus and runni=
ng code&quot;. One got definitiely more contentious and the other gets hard=
er and harder to find these days ... <br></div><div><br></div><div>Otherwis=
e, on the issue, unsurprisingly, I fully concur with Eric, especially it ma=
ybe quite enlightening to go through a small exercise of trying to extend t=
he BGP neighbor FSM with the suggested change=C2=A0 ... <br><br></div><div>=
thanks<br></div><div><br></div><div>--- tony <br></div></div></div>

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Cc: Jeffrey Haas <jhaas@pfrc.org>, idr wg <idr@ietf.org>,  draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>, Sue Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hey Tony,

Honestly and in the public I do want to state that if given a choice of
keep "enhancing" real BGP focusing on DCs vs running RIFT the latter wins
without any doubt.

As long as RIFT is solid and available to run on most of the OEM vendors
and is supported in any common white box operating systems other then code
maturity I would not see any issues to run it for most DCs that really need
such optimal dynamic routing.

Thx,
R.



On Fri, Jul 13, 2018 at 12:00 AM, Tony Przygienda <tonysietf@gmail.com>
wrote:

>
>
>> and for those really brave:
>>
>> * run RIFT
>>
>>
> You probably meant to say "for those who actually want to be able to run
> something that exists". For people interested in code I can encourage
> hackathon102 participation. We're aiming to got a first interop hello 3-way
> up and probably ZTP :-P
>
> Gee, that used to be all "rough consensus and running code". One got
> definitiely more contentious and the other gets harder and harder to find
> these days ...
>
> Otherwise, on the issue, unsurprisingly, I fully concur with Eric,
> especially it maybe quite enlightening to go through a small exercise of
> trying to extend the BGP neighbor FSM with the suggested change  ...
>
> thanks
>
> --- tony
>

--0000000000009f5b490570d49f26
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hey Tony,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">Honestly and in the public I do want to state that =
if given a choice of=C2=A0 keep &quot;enhancing&quot; real BGP focusing on =
DCs vs running RIFT the latter wins without any doubt.=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">As long as RIFT is solid and availab=
le to run on most of the OEM vendors and is supported in any common white b=
ox operating systems other then code maturity I would not see any issues to=
 run it for most DCs that really need such optimal dynamic routing.=C2=A0</=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Fri, Jul 13, 2018 at 12:00 AM, T=
ony Przygienda <span dir=3D"ltr">&lt;<a href=3D"mailto:tonysietf@gmail.com"=
 target=3D"_blank">tonysietf@gmail.com</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><div dir=3D"ltr"><br><div class=3D"gmail_quote"><span c=
lass=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">and for those r=
eally brave:=C2=A0</div><div style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div><div style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">* run RIFT</div><br></div></blockquote><div><br></d=
iv></span><div>You probably meant to say &quot;for those who actually want =
to be able to run something that exists&quot;. For people interested in cod=
e I can encourage hackathon102 participation. We&#39;re aiming to got a fir=
st interop hello 3-way up and probably ZTP :-P<br><br></div><div>Gee, that =
used to be all &quot;rough consensus and running code&quot;. One got defini=
tiely more contentious and the other gets harder and harder to find these d=
ays ... <br></div><div><br></div><div>Otherwise, on the issue, unsurprising=
ly, I fully concur with Eric, especially it maybe quite enlightening to go =
through a small exercise of trying to extend the BGP neighbor FSM with the =
suggested change=C2=A0 ... <br><br></div><div>thanks<span class=3D"HOEnZb">=
<font color=3D"#888888"><br></font></span></div><span class=3D"HOEnZb"><fon=
t color=3D"#888888"><div><br></div><div>--- tony <br></div></font></span></=
div></div>
</blockquote></div><br></div>

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From: Tony Przygienda <tonysietf@gmail.com>
Date: Thu, 12 Jul 2018 15:31:09 -0700
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To: Robert Raszuk <robert@raszuk.net>
Cc: Jeffrey Haas <jhaas@pfrc.org>, idr wg <idr@ietf.org>,  draft-xu-idr-neighbor-autodiscovery@ietf.org, Sue Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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On Thu, Jul 12, 2018 at 3:09 PM Robert Raszuk <robert@raszuk.net> wrote:

> Hey Tony,
>
> Honestly and in the public I do want to state that if given a choice of
> keep "enhancing" real BGP focusing on DCs vs running RIFT the latter wins
> without any doubt.
>
>
First, you saw that my message (as often) was tongue in cheek ;-)

And what you wrote is a somewhat suprising,  interesting (and probably
quite sane ;-) take from you ...


> As long as RIFT is solid and available to run on most of the OEM vendors
> and is supported in any common white box operating systems other then code
> maturity I would not see any issues to run it for most DCs that really need
> such optimal dynamic routing.
>
>
well, code you can download today publicly from a reputable vendor ;-) runs
on Linux & OSX ;-) so you can imagine lots of stuff is quite easily
possible ;-)

Leaf version is not as eye-wateringly trivial as Babel but very easy for
link-state (unless you run a really poor fabric where you may end up with
lots of disaggregation all the time, that's something no protocol will fix
for you) and we see what comes out the hackathon but I would venture a
public domain python for a small fanout switch or server could do just
fine, maybe with a bit of Cython thrown in ... So I think it's very
approachable contrary to building a full fledged link-state @ high perf
which as we know is a bit of a arcane martial art ;-)

Have a peek @ https://github.com/brunorijsman/rift-fsm otherwise ...

Maturity is always an issue but thankfully the problem is far more
constrained than generic problem @ very large scale like ISIS solved. The
sooner people start to soak it, the better we'll be off ... And to your
point, if you have a very mature, very scalable codebase that you start to
"enhance for the better for a use-case orthgonally opposed to original
protocol design" you may likely end up with a much more interesting problem
of possibly kicking over lots deployed, happy folks. You have much more
experience there than I'll ever care to have ...

And per my perception the selling point of RIFT isn't really "optimal"
[whichever optimal we mean here] in first place but zero OPEX, that's the
real problem most organizations are solving building fabrics (that I see)
rather than the few industry giants equiped with almost infinite resources
and belaguered by hoards of candidates looking for employment ;-)

well, I don't mean to hijack the thread and did enough promotional plugin
and we do have a list so before the IDR chairs go after me, I'm out ;-)

--- tony

--000000000000a87dd60570d4eda3
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><br><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu=
, Jul 12, 2018 at 3:09 PM Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk=
.net">robert@raszuk.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Hey Tony,</div><div style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><br></div><div style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small">Honestly and in the publi=
c I do want to state that if given a choice of=C2=A0 keep &quot;enhancing&q=
uot; real BGP focusing on DCs vs running RIFT the latter wins without any d=
oubt.=C2=A0</div><div style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div></div></blockquote><div><br></div><div>First, you saw=
 that my message (as often) was tongue in cheek ;-)<br><br></div><div>And w=
hat you wrote is a somewhat suprising,=C2=A0 interesting (and probably quit=
e sane ;-) take from you ... <br></div><div>=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"></div><div style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">As long as RIFT is solid and =
available to run on most of the OEM vendors and is supported in any common =
white box operating systems other then code maturity I would not see any is=
sues to run it for most DCs that really need such optimal dynamic routing.=
=C2=A0</div><br></div></blockquote><div><br></div><div>well, code you can d=
ownload today publicly from a reputable vendor ;-) runs on Linux &amp; OSX =
;-) so you can imagine lots of stuff is quite easily possible ;-)=C2=A0 <br=
><br></div><div>Leaf version is not as eye-wateringly trivial as Babel but =
very easy for link-state (unless you run a really poor fabric where you may=
 end up with lots of disaggregation all the time, that&#39;s something no p=
rotocol will fix for you) and we see what comes out the hackathon but I wou=
ld venture a public domain python for a small fanout switch or server could=
 do just fine, maybe with a bit of Cython thrown in ... So I think it&#39;s=
 very approachable contrary to building a full fledged link-state @ high pe=
rf which as we know is a bit of a arcane martial art ;-)<br><br></div><div>=
Have a peek @ <a href=3D"https://github.com/brunorijsman/rift-fsm">https://=
github.com/brunorijsman/rift-fsm</a> otherwise ... <br></div><div><br></div=
><div>Maturity is always an issue but thankfully the problem is far more co=
nstrained than generic problem @ very large scale like ISIS solved. The soo=
ner people start to soak it, the better we&#39;ll be off ... And to your po=
int, if you have a very mature, very scalable codebase that you start to &q=
uot;enhance for the better for a use-case orthgonally opposed to original p=
rotocol design&quot; you may likely end up with a much more interesting pro=
blem of possibly kicking over lots deployed, happy folks. You have much mor=
e experience there than I&#39;ll ever care to have ... <br><br></div><div>A=
nd per my perception the selling point of RIFT isn&#39;t really &quot;optim=
al&quot; [whichever optimal we mean here] in first place but zero OPEX, tha=
t&#39;s the real problem most organizations are solving building fabrics (t=
hat I see) rather than the few industry giants equiped with almost infinite=
 resources and belaguered by hoards of candidates looking for employment ;-=
)<br><br></div><div>well, I don&#39;t mean to hijack the thread and did eno=
ugh promotional plugin and we do have a list so before the IDR chairs go af=
ter me, I&#39;m out ;-) <br><br></div><div>--- tony<br></div><div>=C2=A0</d=
iv></div></div>

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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Thu, 12 Jul 2018 18:59:14 -0700
Cc: Jeffrey Haas <jhaas@pfrc.org>, Eric C Rosen <erosen@juniper.net>, idr wg <idr@ietf.org>, draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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To: Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Run RIFT it is!!!
 (Sorry, I=E2=80=99m biased ;-))
=46rom my personal experience - most mid size guys are either running BGP in=
 the underlay already or looking forward to moving to it.
They do need AD functionality, and the proposal being discussed is trying to=
 provide  the solution.

Regards,
Jeff

> On Jul 12, 2018, at 14:34, Robert Raszuk <robert@raszuk.net> wrote:
>=20
>=20
> Very good point Jeff - thx for bringing this one up too in this context.=20=

>=20
> One thing however in this entire thread is very blurry and mixed line betw=
een what is useful for BGP itself and what is specifically useful for the ca=
ses of BGP deployments in MSDCs.=20
>=20
> The fundamental reason why Petr shared the idea of using BGP in large scal=
e DCs was redundant flooding reduction of native link state protocols as wel=
l as lowest common denominator across OEM vendors supporting high speed L3 s=
witches/routers for DC fabric.=20
>=20
> With that let's face it .. there is perhaps only handful of MSDCs in the w=
orld which technically still needs to use BGP as dynamic reachability protoc=
ol. Rest of them would be much better using either:=20
>=20
> * native link state protocols possibly with proposed by Tony Li flooding r=
eduction
> * native link state protocols possibly with proposed by Naiming flooding o=
ptimizations for DCs
> * Russ's proposal for ISIS in openfabric=20
> * (apologies if I missed any other work here)
>=20
> and for those really brave:=20
>=20
> * run RIFT
>=20
> If folks having 10 or 100 or 1000 nodes in the spine of their DCs don't wa=
nt to feel any smaller the FB or MS or Amazon I think they are just fine to e=
ither run BGP as is or be most advanced and support fork of BGP to be focuse=
d on DCs - call it DC-BGP which would run different code base then real WAN B=
GP optimized for small and medium data centers fabrics and would includ use o=
f different TCP ports. LSVR could be placed in that category.=20
>=20
> Thx,
> R.
>=20
> PS, Most of configuration tasks in any well operated network is all automa=
ted. I am missing the real practical need for any auto-configuration or auto=
-discovery enhancements for real data centers where provisioning tool is in p=
lace. Is this for Wild Wild West type of fabrics where spine or super spine o=
r TORs get mounted and connected at random then someone expects that turning=
 it on is all what is needed to improve the fabric's bandwidth ?=20
>=20
>=20
>> On Thu, Jul 12, 2018 at 10:03 PM, Jeffrey Haas <jhaas@pfrc.org> wrote:
>> On Thu, Jul 12, 2018 at 10:35:12AM -0400, Eric C Rosen wrote:
>> > There is so much overlap with the idr-lldp-peer-discovery draft that
>> > I don't see how the WG could adopt both of them.  The
>> > idr-neighbor-autodiscovery draft thus should not be adopted unless
>> > the intention is to reject the idr-lldp-peer discovery draft. Is
>> > that the intention?  I don't recall seeing much discussion comparing
>> > and contrasting the two.
>>=20
>> And not contradicting any of Eric's other good points, we have other work=

>> happening outside of IDR that overlaps this auto discovery problem space:=

>>=20
>> https://datatracker.ietf.org/doc/draft-acee-ospf-bgp-rr/
>>=20
>> Easy to say that it's a popular topic. :-)
>>=20
>> -- Jeff
>>=20
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Run RIFT it is!!!<div>&nbsp;(Sorry, I=E2=80=
=99m biased ;-))<div>=46rom my personal experience - most mid size guys are e=
ither running BGP in the underlay already or looking forward to moving to it=
.</div><div>They do need AD functionality, and the proposal being discussed i=
s trying to provide &nbsp;the solution.<br><br><div id=3D"AppleMailSignature=
">Regards,<div>Jeff</div></div><div><br>On Jul 12, 2018, at 14:34, Robert Ra=
szuk &lt;<a href=3D"mailto:robert@raszuk.net">robert@raszuk.net</a>&gt; wrot=
e:<br><br></div><blockquote type=3D"cite"><div><div dir=3D"ltr"><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">Very good point Jeff - thx for bringing thi=
s one up too in this context.&nbsp;</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">One thing however in this entire thread is very blurry and mixed li=
ne between what is useful for BGP itself and what is specifically useful for=
 the cases of BGP deployments in MSDCs.&nbsp;</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">The fundamental reason why Petr shared the idea of usin=
g BGP in large scale DCs was redundant flooding reduction of native link sta=
te protocols as well as lowest common denominator across OEM vendors support=
ing high speed L3 switches/routers for DC fabric.&nbsp;</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small">With that let's face it .. there is perhaps o=
nly handful of MSDCs in the world which technically still needs to use BGP a=
s dynamic reachability protocol. Rest of them would be much better using eit=
her:&nbsp;</div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small">* native link s=
tate protocols possibly with proposed by Tony Li flooding reduction</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small">* native link state protocols possibly with proposed by Naimi=
ng flooding optimizations for DCs</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">* Russ's proposal f=
or ISIS in openfabric&nbsp;</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">* (apologies if I missed a=
ny other work here)</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">and f=
or those really brave:&nbsp;</div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll">* run RIFT</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small">If folks h=
aving 10 or 100 or 1000 nodes in the spine of their DCs don't want to feel a=
ny smaller the FB or MS or Amazon I think they are just fine to either run B=
GP as is or be most advanced and support fork of BGP to be focused on DCs - c=
all it DC-BGP which would run different code base then real WAN BGP optimize=
d for small and medium data centers fabrics and would includ use of differen=
t TCP ports. LSVR could be placed in that category.&nbsp;</div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">Thx,<br>R.</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">PS, Most of configuration tasks in any well operated netw=
ork is all automated. I am missing the real practical need for any auto-conf=
iguration or auto-discovery enhancements for real data centers where provisi=
oning tool is in place. Is this for&nbsp;Wild Wild West type of fabrics wher=
e spine or super spine or TORs get mounted and connected at random then some=
one expects that turning it on is all what is needed to improve the fabric's=
 bandwidth ?&nbsp;</div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif;font-size:small"><br></div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Thu, Jul 12, 2018 at 10:03 PM, Je=
ffrey Haas <span dir=3D"ltr">&lt;<a href=3D"mailto:jhaas@pfrc.org" target=3D=
"_blank">jhaas@pfrc.org</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><span class=3D"">On Thu, Jul 12, 2018 at 10:35:12AM -0400, Eric C Rosen w=
rote:<br>
&gt; There is so much overlap with the idr-lldp-peer-discovery draft that<br=
>
&gt; I don't see how the WG could adopt both of them.&nbsp; The<br>
&gt; idr-neighbor-autodiscovery draft thus should not be adopted unless<br>
&gt; the intention is to reject the idr-lldp-peer discovery draft. Is<br>
&gt; that the intention?&nbsp; I don't recall seeing much discussion compari=
ng<br>
&gt; and contrasting the two.<br>
<br>
</span>And not contradicting any of Eric's other good points, we have other w=
ork<br>
happening outside of IDR that overlaps this auto discovery problem space:<br=
>
<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-acee-ospf-bgp-rr/" rel=3D"=
noreferrer" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draft-ac=
ee-ospf-bgp-rr/</a><br>
<br>
Easy to say that it's a popular topic. :-)<br>
<br>
-- Jeff<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" tar=
get=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
</div></div></blockquote></div><br></div>
</div></blockquote></div></div></body></html>=

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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Eric C Rosen <erosen@juniper.net>, Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
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Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Fri, 13 Jul 2018 02:08:21 +0000
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: Mach Chen <mach.chen@huawei.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Fri, 13 Jul 2018 03:22:57 +0000
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hi Sue,

I have read the draft and think it's valuable,  support the adoption of it.

Best regards,
Mach

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Tuesday, July 03, 2018 1:09 AM
To: idr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org
Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery

Greetings:

This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscove=
ry (July 2 - July 16).

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

The authors of this draft should send their IPR statements in response to t=
his email.  I hope the authors will ihelp their vacationing co-authors to r=
espond by July 7th.

The WG should consider the following:

1)      Does BGP need to have an autodiscovery mechanism for peers within D=
ata Centers?

2)      Does this mechanism work for other deployments?



3)      If so, should be passed in BGP Hello message?

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).


4)      Does this interact with any of the LSVR work?

I want to thank the authors for their patience while we sorted through some=
 of the WG LC for other drafts.  We decided to wait until some of those dis=
cussion were cleared up prior to starting a new WG Adoption call.


Susan Hares

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<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
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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><font size=3D"2" face=3D"Calibri"><span style=3D"=
font-size:11.0pt;font-weight:bold">From:</span></font></b> Idr [mailto:idr-=
bounces@ietf.org]
<b><span style=3D"font-weight:bold">On Behalf Of </span></b>Susan Hares<br>
<b><span style=3D"font-weight:bold">Sent:</span></b> Tuesday, July 03, 2018=
 1:09 AM<br>
<b><span style=3D"font-weight:bold">To:</span></b> idr@ietf.org<br>
<b><span style=3D"font-weight:bold">Cc:</span></b> draft-xu-idr-neighbor-au=
todiscovery@ietf.org<br>
<b><span style=3D"font-weight:bold">Subject:</span></b> [Idr] WG adoption c=
all for draft-xu-idr-neighbor-autodiscovery<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Greetings:
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">This begins a 2 week WG adoption call for draft-xu-idr-neigh=
bor-autodiscovery (July 2 &#8211; July 16).&nbsp;
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><a href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-nei=
ghbor-autodiscovery/">https://datatracker.ietf.org/doc/draft-xu-idr-neighbo=
r-autodiscovery/</a><o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">The authors of this draft should send their IPR statements i=
n response to this email. &nbsp;I hope the authors will ihelp their vacatio=
ning co-authors to respond by July 7<sup>th</sup>.&nbsp;
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">The WG should consider the following:
<o:p></o:p></span></font></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11.0pt"><span style=3D"mso-list:Ignore">1)<font size=3D"1" fa=
ce=3D"Times New Roman"><span style=3D"font:7.0pt &quot;Times New Roman&quot=
;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>Does BGP need to have an autod=
iscovery mechanism for peers within Data Centers?
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11.0pt"><span style=3D"mso-list:Ignore">2)<font size=3D"1" fa=
ce=3D"Times New Roman"><span style=3D"font:7.0pt &quot;Times New Roman&quot=
;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>Does this mechanism work for o=
ther deployments?
<o:p></o:p></p>
<p class=3D"MsoListParagraph"><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11.0pt"><span style=3D"mso-list:Ignore">3)<font size=3D"1" fa=
ce=3D"Times New Roman"><span style=3D"font:7.0pt &quot;Times New Roman&quot=
;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>If so, should be passed in BGP=
 Hello message?&nbsp;
<o:p></o:p></p>
<p class=3D"MsoListParagraph"><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11.0pt">Or should it be a part of another protocol (e.g. LLDP=
, BFD, etc).
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo2"><![if !supportLists]><font size=3D"2" face=3D"Calibri"><span style=
=3D"font-size:11.0pt"><span style=3D"mso-list:Ignore">4)<font size=3D"1" fa=
ce=3D"Times New Roman"><span style=3D"font:7.0pt &quot;Times New Roman&quot=
;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>Does this interact with any of=
 the LSVR work?
<o:p></o:p></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">I want to thank the authors for their patience while we sort=
ed through some of the WG LC for other drafts.&nbsp; We decided to wait unt=
il some of those discussion were cleared up prior
 to starting a new WG Adoption call.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Susan Hares
<o:p></o:p></span></font></p>
</div>
</div>
</body>
</html>

--_000_F73A3CB31E8BE34FA1BBE3C8F0CB2AE2924E7267dggeml510mbxchi_--


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From: Gaurav Dawra <gdawra.ietf@gmail.com>
Date: Thu, 12 Jul 2018 22:03:09 -0700
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To: Susan Hares <shares@ndzh.com>
Cc: idr wg <idr@ietf.org>, draft-xu-idr-neighbor-autodiscovery@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fAp9yV3u0uNzYYeozNvzGovivaI>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hi,

While I think having a BGP neighbor auto-discovery protocol would be useful
in DCs.
There is a potential scaling issue to process hello messages as a number of
BGP sessions scale increases.
Proper handling of proposed hello messages needs to be addressed first.

Cheers,

Gaurav

>
> On Mon, Jul 2, 2018 at 10:08 AM, Susan Hares <shares@ndzh.com> wrote:
>
>> Greetings:
>>
>>
>>
>> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisc=
overy
>> (July 2 =E2=80=93 July 16).
>>
>>
>>
>> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>>
>>
>>
>> The authors of this draft should send their IPR statements in response t=
o
>> this email.  I hope the authors will ihelp their vacationing co-authors =
to
>> respond by July 7th.
>>
>>
>>
>> The WG should consider the following:
>>
>> 1)      Does BGP need to have an autodiscovery mechanism for peers
>> within Data Centers?
>>
>> 2)      Does this mechanism work for other deployments?
>>
>>
>>
>> 3)      If so, should be passed in BGP Hello message?
>>
>> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>>
>>
>>
>> 4)      Does this interact with any of the LSVR work?
>>
>>
>>
>> I want to thank the authors for their patience while we sorted through
>> some of the WG LC for other drafts.  We decided to wait until some of th=
ose
>> discussion were cleared up prior to starting a new WG Adoption call.
>>
>>
>>
>>
>>
>> Susan Hares
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>

--00000000000068e6f80570da6536
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<div dir=3D"ltr">Hi,<div><br></div><div><span style=3D"font-size:12.8px;bac=
kground-color:rgb(255,255,255);text-decoration-style:initial;text-decoratio=
n-color:initial;float:none;display:inline">While I think having a BGP neigh=
bor auto-discovery protocol would be useful in DCs.</span><br style=3D"font=
-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initia=
l;text-decoration-color:initial">There is a potential scaling issue to proc=
ess hello messages as a number of BGP sessions scale increases.</div><div>P=
roper handling of proposed hello messages needs to be addressed first.</div=
><div><br></div><div>Cheers,</div><div><br></div><div>Gaurav</div><div clas=
s=3D"gmail_extra"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
><div dir=3D"auto"><div><div dir=3D"ltr"><div class=3D"gmail_extra"><br><di=
v class=3D"gmail_quote"><div><div class=3D"h5">On Mon, Jul 2, 2018 at 10:08=
 AM, Susan Hares <span dir=3D"ltr">&lt;<a href=3D"mailto:shares@ndzh.com" t=
arget=3D"_blank">shares@ndzh.com</a>&gt;</span> wrote:<br></div></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex"><div><div class=3D"h5"><div lang=3D"EN-US" link=
=3D"blue" vlink=3D"purple"><div><p class=3D"MsoNormal">Greetings: <u></u><u=
></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNorm=
al">This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodis=
c<wbr>overy (July 2 =E2=80=93 July 16).=C2=A0 <u></u><u></u></p><p class=3D=
"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><a href=3D"https=
://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/" target=3D=
"_blank">https://datatracker.ietf.org/d<wbr>oc/draft-xu-idr-neighbor-autod<=
wbr>iscovery/</a><u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u><=
/u></p><p class=3D"MsoNormal">The authors of this draft should send their I=
PR statements in response to this email.=C2=A0 I hope the authors will ihel=
p their vacationing co-authors to respond by July 7<sup>th</sup>.=C2=A0 <u>=
</u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"M=
soNormal">The WG should consider the following: <u></u><u></u></p><p><u></u=
><span>1)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span dir=3D"LTR"></span>Does BG=
P need to have an autodiscovery mechanism for peers within Data Centers? <u=
></u><u></u></p><p><u></u><span>2)<span style=3D"font:7.0pt &quot;Times New=
 Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span dir=
=3D"LTR"></span>Does this mechanism work for other deployments? <u></u><u><=
/u></p><p><u></u>=C2=A0<u></u></p><p><u></u><span>3)<span style=3D"font:7.0=
pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></spa=
n><u></u><span dir=3D"LTR"></span>If so, should be passed in BGP Hello mess=
age?=C2=A0 <u></u><u></u></p><p>Or should it be a part of another protocol =
(e.g. LLDP, BFD, etc). <u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=
=A0<u></u></p><p><u></u><span>4)<span style=3D"font:7.0pt &quot;Times New R=
oman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span><u></u><span dir=
=3D"LTR"></span>Does this interact with any of the LSVR work? <u></u><u></u=
></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">=
I want to thank the authors for their patience while we sorted through some=
 of the WG LC for other drafts.=C2=A0 We decided to wait until some of thos=
e discussion were cleared up prior to starting a new WG Adoption call.<span=
><font color=3D"#888888"><u></u><u></u></font></span></p><span><font color=
=3D"#888888"><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"Mso=
Normal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Susan Hares <u></u><=
u></u></p></font></span></div></div><br></div></div><span class=3D"">______=
________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></span></blockquote></div><br></div></div>
</div></div></blockquote></div><br></div></div>

--00000000000068e6f80570da6536--


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From: Keyur Patel <keyur@arrcus.com>
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Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fLhCoV1-KadaiurL6L9MSnDk1fQ>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: Keyur Patel <keyur@arrcus.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/n3VdLMMxrbUcQsdzImuyG1OhpnQ>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: Robert Raszuk <robert@raszuk.net>
Date: Fri, 13 Jul 2018 09:18:22 +0200
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Cc: Keyur Patel <keyur@arrcus.com>, Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>,  "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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>
> BTW, what makes you believe that the BGP Hello message is within BGP or
> included in BGP?:)
>

=E2=80=8BBecause the proposal is for IDR WG and is being asked for adoption=
 by IDR
WG.

If you move the proposal to RTGWG and not recommend using UDP port 179 I
think it may go smooth as is.

Thx,
R.=E2=80=8B

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex"><div><div style=3D"line-height:1.7;font-family:T=
ahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><div>BTW, what m=
akes you believe that the BGP Hello message is within BGP or included in BG=
P?:)</div></div></div></blockquote><div><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=80=
=8BBecause the proposal is for IDR WG and is being asked for adoption by ID=
R WG.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">If you mov=
e the proposal to RTGWG and not recommend using UDP port 179 I think it may=
 go smooth as is.=C2=A0</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">Thx,<br>R.=E2=80=8B</div></div></div></div>

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From nobody Fri Jul 13 07:11:59 2018
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Date: Fri, 13 Jul 2018 10:11:49 -0400
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From: Randy Bush <randy@psg.com>
To: Jeffrey Haas <jhaas@pfrc.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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a lot of discovery of discovery.  can we get three deep?  :)

seems to me that this partiular approach brings all the chattiness and
scalability problems of igps (which, for example tli is working on) into
bgp.  this may not be a good thing.

randy


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From nobody Fri Jul 13 07:34:31 2018
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From: Randy Bush <randy@psg.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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> I don=A2t think we should settle on this auto-discovery mechanism at
> this point just because they were the first to ask for adoption.
> There are trade-offs for the various auto-discovery techniques as
> mentioned in the thread.

someone should do a presentation on the dimensions and desiderata in
this space.  maybe schedule it in lsvr.  oh, wait

randy


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Cc: Keyur Patel <keyur@arrcus.com>, Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, lsvr@ietf.com
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+1

Next week LSVR WG will have a discussion detailing auto-discovery =
problem-space/requirements.=20
Properties as e.g. scaling, simplicity and generic usability are taken =
into consideration.

imo it seems too early to adopt/settle on a solution, while we have =
options available ("create something new", "augment something existing" =
or "reuse something existing")

G/



> On 13 Jul 2018, at 16:13, Acee Lindem (acee) =
<acee=3D40cisco.com@dmarc.ietf.org> wrote:
>=20
> Hi Sue, et al,=20
> =20
> I don=E2=80=99t think we should settle on this auto-discovery =
mechanism at this point just because they were the first to ask for =
adoption.  There are trade-offs  for the various auto-discovery =
techniques as mentioned in the thread.=20
> =20
> Thanks,
> Acee
> =20
> From: Idr <idr-bounces@ietf.org <mailto:idr-bounces@ietf.org>> on =
behalf of Keyur Patel <keyur@arrcus.com <mailto:keyur@arrcus.com>>
> Date: Friday, July 13, 2018 at 1:44 AM
> To: Susan Hares <shares@ndzh.com <mailto:shares@ndzh.com>>, IDR List =
<idr@ietf.org <mailto:idr@ietf.org>>
> Cc: "draft-xu-idr-neighbor-autodiscovery@ietf.org =
<mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>" =
<draft-xu-idr-neighbor-autodiscovery@ietf.org =
<mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>>
> Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery
> =20
> Hi Sue,
> =20
> While I think the BGP discovery work is import, I don=E2=80=99t think =
WG should adopt this document at this time.  My answers are further =
inlined #Keyur.
> =20
> From: Idr <idr-bounces@ietf.org <mailto:idr-bounces@ietf.org>> on =
behalf of Susan Hares <shares@ndzh.com <mailto:shares@ndzh.com>>
> Date: Monday, July 2, 2018 at 11:10 AM
> To: "idr@ietf.org <mailto:idr@ietf.org>" <idr@ietf.org =
<mailto:idr@ietf.org>>
> Cc: "draft-xu-idr-neighbor-autodiscovery@ietf.org =
<mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>" =
<draft-xu-idr-neighbor-autodiscovery@ietf.org =
<mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>>
> Subject: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery
> =20
> Greetings: <>
> =20
> This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16).=20
> =20
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/ =
<https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/>
> =20
> The authors of this draft should send their IPR statements in response =
to this email.  I hope the authors will ihelp their vacationing =
co-authors to respond by July 7th.=20
> =20
> The WG should consider the following:
> 1)      Does BGP need to have an autodiscovery mechanism for peers =
within Data Centers?
> =20
> #Keyur: Yes.
> =20
> 2)      Does this mechanism work for other deployments?=20
> =20
> #Keyur: Yes.
> =20
> 3)      If so, should be passed in BGP Hello message? =20
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
> =20
> #Keyur:  It should not be included in BGP (or any BGP Hello messages). =
 Any such mechanism within BGP  will 1) conflict with existing =
keepalives and 2) impose scale issues when it comes to supporting large =
number of BGP peers.=20
> =20
>                 My suggestion is to implement discovery mechanism =
outside BGP.
> =20
> 4)      Does this interact with any of the LSVR work?=20
> #Keyur: Yes it does.
> =20
> Regards,
> Keyur
> =20
> =20
> I want to thank the authors for their patience while we sorted through =
some of the WG LC for other drafts.  We decided to wait until some of =
those discussion were cleared up prior to starting a new WG Adoption =
call.
> =20
> =20
> Susan Hares
> _______________________________________________
> Idr mailing list
> Idr@ietf.org <mailto:Idr@ietf.org>
> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>

--Apple-Mail=_731C8391-162D-4555-A3F4-FB3341396EC8
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">+1<div class=3D""><br class=3D""></div><div class=3D"">Next =
week LSVR WG will have a discussion detailing auto-discovery =
problem-space/requirements.&nbsp;</div><div class=3D"">Properties as =
e.g. scaling, simplicity and generic usability are taken into =
consideration.</div><div class=3D""><br class=3D""></div><div =
class=3D"">imo it seems too early to adopt/settle on a solution, while =
we have options available ("create something new", "augment something =
existing" or "reuse something existing")</div><div class=3D""><br =
class=3D""></div><div class=3D"">G/</div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 13 Jul 2018, at 16:13, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee=3D40cisco.com@dmarc.ietf.org" =
class=3D"">acee=3D40cisco.com@dmarc.ietf.org</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D"">Hi Sue, et al,<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-size: 12pt;" class=3D"">I don=E2=80=99t =
think we should settle on this auto-discovery mechanism at this point =
just because they were the first to ask for adoption. &nbsp;There are =
trade-offs &nbsp;for the various auto-discovery techniques as mentioned =
in the thread.<span class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-size: 12pt;" class=3D"">Thanks,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D"">Acee<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"border-style: solid =
none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D""><span style=3D"font-size: 12pt;" class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-size: 12pt;" class=3D"">Idr &lt;<a =
href=3D"mailto:idr-bounces@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">idr-bounces@ietf.org</a>&gt; on =
behalf of Keyur Patel &lt;<a href=3D"mailto:keyur@arrcus.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">keyur@arrcus.com</a>&gt;<br class=3D""><b class=3D"">Date:<span=
 class=3D"Apple-converted-space">&nbsp;</span></b>Friday, July 13, 2018 =
at 1:44 AM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com" style=3D"color: purple; text-decoration: =
underline;" class=3D"">shares@ndzh.com</a>&gt;, IDR List &lt;<a =
href=3D"mailto:idr@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">idr@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Cc:<span class=3D"Apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>" &lt;<a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Re: [Idr] WG adoption =
call for draft-xu-idr-neighbor-autodiscovery<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Hi Sue,<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">While I think the BGP discovery work is =
import, I don=E2=80=99t think WG should adopt this document at this =
time. &nbsp;My answers are further inlined #Keyur.<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 0.5in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div><div style=3D"border-style: solid none none; =
border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: =
3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D""><span style=3D"font-size: 12pt;" class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-size: 12pt;" class=3D"">Idr &lt;<a =
href=3D"mailto:idr-bounces@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">idr-bounces@ietf.org</a>&gt; on =
behalf of Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">shares@ndzh.com</a>&gt;<br class=3D""><b class=3D"">Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Monday, July 2, 2018 at =
11:10 AM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:idr@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">idr@ietf.org</a>" &lt;<a =
href=3D"mailto:idr@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">idr@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Cc:<span class=3D"Apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>" &lt;<a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>[Idr] WG adoption call =
for draft-xu-idr-neighbor-autodiscovery</span><o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div></div><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><a name=3D"_MailOriginalBody" =
class=3D"">Greetings:<o:p class=3D""></o:p></a></div><div style=3D"margin:=
 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July =
16).&nbsp;<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D""></span><a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscove=
ry/" style=3D"color: purple; text-decoration: underline;" class=3D""><span=
 =
class=3D"">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodisc=
overy/</span><span class=3D""></span></a><span class=3D""><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">The authors of this =
draft should send their IPR statements in response to this email. =
&nbsp;I hope the authors will ihelp their vacationing co-authors to =
respond by July 7<sup class=3D"">th</sup>.&nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">The WG should consider =
the following:<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt 1in; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -0.25in;" class=3D""><span class=3D""><span =
class=3D"">1)<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-stretch: normal; font-size: 7pt; =
line-height: normal; font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span>Does BGP need =
to have an autodiscovery mechanism for peers within Data Centers?<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">#Keyur: Yes.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -0.25in;" class=3D""><span =
class=3D""><span class=3D"">2)<span style=3D"font-style: normal; =
font-variant-caps: normal; font-weight: normal; font-stretch: normal; =
font-size: 7pt; line-height: normal; font-family: &quot;Times New =
Roman&quot;;" class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span>Does this =
mechanism work for other deployments?<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
1in; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D"">#Keyur: Yes.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -0.25in;" class=3D""><span =
class=3D""><span class=3D"">3)<span style=3D"font-style: normal; =
font-variant-caps: normal; font-weight: normal; font-stretch: normal; =
font-size: 7pt; line-height: normal; font-family: &quot;Times New =
Roman&quot;;" class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span>If so, should =
be passed in BGP Hello message?&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
1in; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"">Or should it be a part of another protocol (e.g. LLDP, BFD, =
etc).<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">#Keyur:&nbsp; It =
should not be included in BGP (or any BGP Hello messages). &nbsp;Any =
such mechanism within BGP&nbsp; will 1) conflict with existing =
keepalives and 2) impose scale issues when it comes to supporting large =
number of BGP peers.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp; My suggestion is to implement discovery =
mechanism outside BGP.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
1in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span class=3D""><span class=3D"">4)<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span>Does this =
interact with any of the LSVR work?<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">#Keyur: Yes it does.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">Regards,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">Keyur<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">I want to thank the =
authors for their patience while we sorted through some of the WG LC for =
other drafts.&nbsp; We decided to wait until some of those discussion =
were cleared up prior to starting a new WG Adoption call.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">&nbsp;<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"">Susan Hares<o:p =
class=3D""></o:p></span></div></div><span style=3D"caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
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normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;" =
class=3D"">_______________________________________________</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
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text-transform: none; white-space: normal; word-spacing: 0px; =
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style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
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text-transform: none; white-space: normal; word-spacing: 0px; =
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display: inline !important;" class=3D"">Idr mailing list</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
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text-transform: none; white-space: normal; word-spacing: 0px; =
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font-family: Helvetica; font-size: 12px; font-style: normal; =
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To: Keyur Patel <keyur@arrcus.com>
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Responses inline marked #NT

On Fri, Jul 13, 2018 at 8:44 AM, Keyur Patel <keyur@arrcus.com> wrote:

> Hi Sue,
>
>
>
> While I think the BGP discovery work is import, I don=E2=80=99t think WG =
should
> adopt this document at this time.  My answers are further inlined #Keyur.
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of Susan Hares <
> shares@ndzh.com>
> *Date: *Monday, July 2, 2018 at 11:10 AM
> *To: *"idr@ietf.org" <idr@ietf.org>
> *Cc: *"draft-xu-idr-neighbor-autodiscovery@ietf.org" <
> draft-xu-idr-neighbor-autodiscovery@ietf.org>
> *Subject: *[Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
>
>
>
> Greetings:
>
>
>
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodisco=
very
> (July 2 =E2=80=93 July 16).
>
>
>
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>
>
>
> The authors of this draft should send their IPR statements in response to
> this email.  I hope the authors will ihelp their vacationing co-authors t=
o
> respond by July 7th.
>
>
>
> The WG should consider the following:
>
>    1. Does BGP need to have an autodiscovery mechanism for peers within
>    Data Centers?
>
>
>
> #Keyur: Yes.
>
>
>
>    1. Does this mechanism work for other deployments?
>
>
>
> #Keyur: Yes.
>
>
>
>    1. If so, should be passed in BGP Hello message?
>
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>
>
>
> #Keyur:  It should not be included in BGP (or any BGP Hello messages).
> Any such mechanism within BGP  will 1) conflict with existing keepalives
> and 2) impose scale issues when it comes to supporting large number of BG=
P
> peers.
>

#NT: Regarding (1) the draft will address this in the next update. (2) is
simply not true :-)


>
>
>                 My suggestion is to implement discovery mechanism outside
> BGP.
>

#NT: This is restrictive and requires those running only BGP, to run yet
another mechanism/protocol IMO needlessly. The added complexity is
certainly not desirable by operators either.


>
>
>    1. Does this interact with any of the LSVR work?
>
> #Keyur: Yes it does.
>
>
>
> Regards,
>
> Keyur
>
>
>
>
>
> I want to thank the authors for their patience while we sorted through
> some of the WG LC for other drafts.  We decided to wait until some of tho=
se
> discussion were cleared up prior to starting a new WG Adoption call.
>
>
>
>
>
> Susan Hares
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--0000000000002a6a810570e57bc5
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<div dir=3D"ltr">Responses inline marked #NT<br><div class=3D"gmail_extra">=
<br><div class=3D"gmail_quote">On Fri, Jul 13, 2018 at 8:44 AM, Keyur Patel=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:keyur@arrcus.com" target=3D"_blank=
">keyur@arrcus.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div link=3D"blue" vlink=3D"purple" lang=3D"EN-US">
<div>
<p class=3D"MsoNormal">Hi Sue,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">While I think the BGP discovery work is import, I do=
n=E2=80=99t think WG should adopt this document at this time.=C2=A0 My answ=
ers are further inlined #Keyur.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<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:12.0pt;color:black">From=
: </span></b><span style=3D"font-size:12.0pt;color:black">Idr &lt;<a href=
=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>=
&gt; on behalf of Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=
=3D"_blank">shares@ndzh.com</a>&gt;<br>
<b>Date: </b>Monday, July 2, 2018 at 11:10 AM<span class=3D""><br>
<b>To: </b>&quot;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf=
.org</a>&quot; &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ie=
tf.org</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf=
.org" target=3D"_blank">draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</=
a>&quot; &lt;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org=
" target=3D"_blank">draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>&g=
t;<br>
</span><b>Subject: </b>[Idr] WG adoption call for draft-xu-idr-neighbor-<wb=
r>autodiscovery<u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal"><a name=3D"m_8138031968855079248__MailOriginalBody">=
Greetings: <u></u><u></u></a></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>This begins a 2 week WG adoption call for draf=
t-xu-idr-neighbor-<wbr>autodiscovery (July 2 =E2=80=93 July 16).=C2=A0
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span></span><a href=3D"https://datatracker.ietf.org=
/doc/draft-xu-idr-neighbor-autodiscovery/" target=3D"_blank"><span>https://=
datatracker.ietf.org/<wbr>doc/draft-xu-idr-neighbor-<wbr>autodiscovery/</sp=
an><span></span></a><span><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>The authors of this draft should send their IP=
R statements in response to this email.=C2=A0 I hope the authors will ihelp=
 their vacationing co-authors to respond by July 7<sup>th</sup>.=C2=A0
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>The WG should consider the following:
<u></u><u></u></span></p>
</span><ol style=3D"margin-top:0in" start=3D"1" type=3D"1">
<li style=3D"margin-left:0in"><span>Does BGP need to have an autodiscovery =
mechanism for peers within Data Centers?
<u></u><u></u></span></li></ol>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>#Keyur: Yes. <u></u>
<u></u></span></p><span class=3D"">
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<ol style=3D"margin-top:0in" start=3D"2" type=3D"1">
<li style=3D"margin-left:0in"><span>Does this mechanism work for other depl=
oyments?
<u></u><u></u></span></li></ol>
<p><span><u></u>=C2=A0<u></u></span></p>
</span><p style=3D"margin-left:0in"><span>#Keyur: Yes.<u></u><u></u></span>=
</p><span class=3D"">
<p style=3D"margin-left:0in"><span><u></u>=C2=A0<u></u></span></p>
<ol style=3D"margin-top:0in" start=3D"3" type=3D"1">
<li style=3D"margin-left:0in"><span>If so, should be passed in BGP Hello me=
ssage?=C2=A0
<u></u><u></u></span></li></ol>
<p><span>Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
</span><p class=3D"MsoNormal"><span>#Keyur:=C2=A0 It should not be included=
 in BGP (or any BGP Hello messages).=C2=A0 Any such mechanism within BGP=C2=
=A0 will 1) conflict with existing keepalives and 2) impose scale issues wh=
en it comes to supporting
 large number of BGP peers. </span></p></div></div></blockquote><div><br></=
div><div>#NT: Regarding (1) the draft will address this in the next update.=
 (2) is simply not true :-)<br></div><div>=C2=A0</div><blockquote class=3D"=
gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex"><div link=3D"blue" vlink=3D"purple" lang=3D"EN-US"><div><p class=
=3D"MsoNormal"><span><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 My suggestion is to implement=
 discovery mechanism outside BGP.</span></p></div></div></blockquote><div><=
br></div><div>#NT: This is restrictive and requires those running only BGP,=
 to run yet another mechanism/protocol IMO needlessly. The added complexity=
 is certainly not desirable by operators either.<br></div><div>=C2=A0</div>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div link=3D"blue" vlink=3D"purple" lang=3D"=
EN-US"><div><p class=3D"MsoNormal"><span><u></u><u></u></span></p><span cla=
ss=3D"">
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<ol style=3D"margin-top:0in" start=3D"4" type=3D"1">
<li style=3D"margin-left:0in"><span>Does this interact with any of the LSVR=
 work?
<u></u><u></u></span></li></ol>
</span><p class=3D"MsoNormal"><span>#Keyur: Yes it does.<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>Regards,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>Keyur<u></u><u></u></span></p><span class=3D""=
>
<p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>I want to thank the authors for their patience=
 while we sorted through some of the WG LC for other drafts.=C2=A0 We decid=
ed to wait until some of those discussion were cleared up prior to starting
 a new WG Adoption call.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span>Susan Hares <u></u>
<u></u></span></p>
</span></div>
</div>

<br>______________________________<wbr>_________________<br>
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<br></blockquote></div><br></div></div>

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Cc: Keyur Patel <keyur@arrcus.com>, "idr@ietf.org" <idr@ietf.org>,  "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Content-Type: text/plain; charset="UTF-8"

 Hey Nikos,


> My suggestion is to implement discovery mechanism outside BGP.
>

#NT: This is restrictive and requires those running only BGP, to run yet
another mechanism/protocol IMO needlessly

When you are designing a data center there is much much more then BGP for
underlay you need to worry about. The choice of what protocol to use from
TORs towards compute nodes and from TORs towards the spine or how to
exchange reachability between spines is just white noise at most (if you
seriously looking at complete data center design).

Then there is orchestration layer to manage the compute or storage
infrastructure etc ... Some DCs use overlays some use only flat host routes
in the underlay etc .. Then there are those DCs still running a lot of
native multicast with expectations to move to BIER soon etc ... So let's
not use such arguments of "single protocol" for DC as this is just not
correct if you consider the full DC architecture.

- - -

Back to your proposal - the way I read it nothing prevents me today to
blasts the BGP Hellos over logical interfaces for any AFI/SAFI you like as
far as I like - correct ? Eric pointed this out as well yesterday. Is that
intentional or accidental? Also can multicast address from "all routes on
the subnet" be modified by the implementation to any other multicast
address ? If so then you can discover bunch of other cool things in your
multicast domain - all with BGP !

Btw in number of deployments UDP is blocked in the fabric or on TORs by
ACLs at the interface level. So to make sure this works folks need to punch
wholes in the ACLs.

Last it is often the case today - when running no overlay - to advertise
dynamically VMs or LXCs addresses to TORs via routing protocol - say BGP.
What happens when now the LXCs or VMs will start sending such BGP Hellos
directly to TORs ? Do you envision that this proposal will automatically
establish BGP sessions with those tenant entities if they happen to be on
the same subnet then compute node itself ?

Bottom line is that we do not know really what complete set of
functionality (both intended and accidental) are we having the WG
acceptance call for. The document is missing so much text that at this
stage IMO it is not eligible for any IETF WG adoption pool.

Thx,
R.

--0000000000005783110570e613f9
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">

<span class=3D"gmail-im" style=3D"color:rgb(80,0,80);font-family:arial,sans=
-serif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration-s=
tyle:initial;text-decoration-color:initial"><div>Hey Nikos,</div><div><span=
 style=3D"font-size:12.8px">=C2=A0</span><br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex"><div lang=3D"EN-US"><div><p class=3D"MsoNormal" s=
tyle=3D"margin:0px"><span>My suggestion is to implement discovery mechanism=
 outside BGP.</span></p></div></div></blockquote><div><br></div></span><div=
 style=3D"font-family:arial,sans-serif;font-size:12.8px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial"=
>#NT: This is restrictive and requires those running only BGP, to run yet a=
nother mechanism/protocol IMO needlessly</div>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small">When you are designing a data center there is =
much much more then BGP for underlay you need to worry about. The choice of=
 what protocol to use from TORs towards compute nodes and from TORs towards=
 the spine or how to exchange reachability between spines is just white noi=
se at most (if you seriously looking at complete data center design).=C2=A0=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">Then there is orchest=
ration layer to manage the compute or storage infrastructure etc ... Some D=
Cs use overlays some use only flat host routes in the underlay etc .. Then =
there are those DCs still running a lot of native multicast with expectatio=
ns to move to BIER soon etc ... So let&#39;s not use such arguments of &quo=
t;single protocol&quot; for DC as this is just not correct if you consider =
the full DC architecture.=C2=A0</div><div class=3D"gmail_default" style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small">- - -=C2=A0</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail=
_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
Back to your proposal - the way I read it nothing prevents me today to blas=
ts the BGP Hellos over logical interfaces for any AFI/SAFI you like as far =
as I like - correct ? Eric pointed this out as well yesterday. Is that inte=
ntional or accidental? Also can multicast address from &quot;all routes on =
the subnet&quot; be modified by the implementation to any other multicast a=
ddress ? If so then you can discover bunch of other cool things in your mul=
ticast domain - all with BGP !=C2=A0</div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small">Btw in number of deployments UDP is blocked in the fabric or=
 on TORs by ACLs at the interface level. So to make sure this works folks n=
eed to punch wholes in the ACLs.=C2=A0</div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small">Last it is often the case today - when running no overlay =
- to advertise dynamically VMs or LXCs addresses to TORs via routing protoc=
ol - say BGP. What happens when now the LXCs or VMs will start sending such=
 BGP Hellos directly to TORs ? Do you envision that this proposal will auto=
matically establish BGP sessions with those tenant entities if they happen =
to be on the same subnet then compute node itself ?=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Bottom line is that we do not know re=
ally what complete set of functionality (both intended and accidental) are =
we having the WG acceptance call for. The document is missing so much text =
that at this stage IMO it is not eligible for any IETF WG adoption pool.=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">R.</div></div>

--0000000000005783110570e613f9--


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Cc: Keyur Patel <keyur@arrcus.com>, "idr@ietf.org" <idr@ietf.org>,  "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Inline marked #NT.

On Fri, Jul 13, 2018 at 9:59 PM, Robert Raszuk <robert@raszuk.net> wrote:

> Hey Nikos,
>
>
>> My suggestion is to implement discovery mechanism outside BGP.
>>
>
> #NT: This is restrictive and requires those running only BGP, to run yet
> another mechanism/protocol IMO needlessly
>
> When you are designing a data center there is much much more then BGP for
> underlay you need to worry about. The choice of what protocol to use from
> TORs towards compute nodes and from TORs towards the spine or how to
> exchange reachability between spines is just white noise at most (if you
> seriously looking at complete data center design).
>

#NT: A lot of data centers don't run a protocol from ToRs towards compute
nodes. The DC world comes in many flavors ;-)


>
> Then there is orchestration layer to manage the compute or storage
> infrastructure etc ... Some DCs use overlays some use only flat host routes
> in the underlay etc .. Then there are those DCs still running a lot of
> native multicast with expectations to move to BIER soon etc ... So let's
> not use such arguments of "single protocol" for DC as this is just not
> correct if you consider the full DC architecture.
>

#NT: Please read more carefully what I wrote. I didn't make such a blanket
statement of "single protocol" for all DCs as you are making out my
statement to be:-)  Also, if you have DC architecture examples where the
proposed mechanism fails or is not sufficient, then we should discuss.


> - - -
>
> Back to your proposal - the way I read it nothing prevents me today to
> blasts the BGP Hellos over logical interfaces for any AFI/SAFI you like as
> far as I like - correct ? Eric pointed this out as well yesterday. Is that
> intentional or accidental? Also can multicast address from "all routes on
> the subnet" be modified by the implementation to any other multicast
> address ? If so then you can discover bunch of other cool things in your
> multicast domain - all with BGP !
>

#NT: Agreed, Eric made some valid points. The draft needs work to spell out
what the intention is in areas of concern and we will do that.


>
> Btw in number of deployments UDP is blocked in the fabric or on TORs by
> ACLs at the interface level. So to make sure this works folks need to punch
> wholes in the ACLs.
>

#NT: IMO this is irrelevant in the context of the draft. It's an
operational issue for those specific deployments and a much simpler one to
address than asking someone to run yet another protocol if the
functionality could be provided by enhancing the existing one they run.
That's my take on that.


>
> Last it is often the case today - when running no overlay - to advertise
> dynamically VMs or LXCs addresses to TORs via routing protocol - say BGP.
> What happens when now the LXCs or VMs will start sending such BGP Hellos
> directly to TORs ? Do you envision that this proposal will automatically
> establish BGP sessions with those tenant entities if they happen to be on
> the same subnet then compute node itself ?
>

#NT: Do you need to enable such functionality on the VMs or LXCs?


>
> Bottom line is that we do not know really what complete set of
> functionality (both intended and accidental) are we having the WG
> acceptance call for. The document is missing so much text that at this
> stage IMO it is not eligible for any IETF WG adoption pool.
>
> Thx,
> R.
>

--000000000000e741de0570e6a132
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Inline marked #NT.<br><div class=3D"gmail_extra"><br><div =
class=3D"gmail_quote">On Fri, Jul 13, 2018 at 9:59 PM, Robert Raszuk <span =
dir=3D"ltr">&lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robe=
rt@raszuk.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
dir=3D"ltr"><div style=3D"font-family:arial,helvetica,sans-serif;font-size:=
small">

<span style=3D"color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12=
.8px;background-color:rgb(255,255,255)"><div>Hey Nikos,</div><span class=3D=
""><div><span style=3D"font-size:12.8px">=C2=A0</span><br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div><p class=3D=
"MsoNormal" style=3D"margin:0px"><span>My suggestion is to implement discov=
ery mechanism outside BGP.</span></p></div></div></blockquote><div><br></di=
v></span></span><span class=3D""><div style=3D"font-family:arial,sans-serif=
;font-size:12.8px;background-color:rgb(255,255,255)">#NT: This is restricti=
ve and requires those running only BGP, to run yet another mechanism/protoc=
ol IMO needlessly</div>

<br></span></div><div style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small">When you are designing a data center there is much much more th=
en BGP for underlay you need to worry about. The choice of what protocol to=
 use from TORs towards compute nodes and from TORs towards the spine or how=
 to exchange reachability between spines is just white noise at most (if yo=
u seriously looking at complete data center design).=C2=A0</div></div></blo=
ckquote><div><br></div><div>#NT: A lot of data centers don&#39;t run a prot=
ocol from ToRs towards compute nodes. The DC world comes in many flavors ;-=
)<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"=
><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
>Then there is orchestration layer to manage the compute or storage infrast=
ructure etc ... Some DCs use overlays some use only flat host routes in the=
 underlay etc .. Then there are those DCs still running a lot of native mul=
ticast with expectations to move to BIER soon etc ... So let&#39;s not use =
such arguments of &quot;single protocol&quot; for DC as this is just not co=
rrect if you consider the full DC architecture.=C2=A0</div></div></blockquo=
te><div><br></div><div>#NT: Please read more carefully what I wrote. I didn=
&#39;t make such a blanket statement of &quot;single protocol&quot; for all=
 DCs as you are making out my statement to be:-)=C2=A0 Also, if you have DC=
 architecture examples where the proposed mechanism fails or is not suffici=
ent, then we should discuss.<br></div><div>=C2=A0</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 style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">- - -=C2=A0</div><div style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small"><br></div><div style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small">Back to your proposal - the way I r=
ead it nothing prevents me today to blasts the BGP Hellos over logical inte=
rfaces for any AFI/SAFI you like as far as I like - correct ? Eric pointed =
this out as well yesterday. Is that intentional or accidental? Also can mul=
ticast address from &quot;all routes on the subnet&quot; be modified by the=
 implementation to any other multicast address ? If so then you can discove=
r bunch of other cool things in your multicast domain - all with BGP !=C2=
=A0</div></div></blockquote><div><br></div><div>#NT: Agreed, Eric made some=
 valid points. The draft needs work to spell out what the intention is in a=
reas of concern and we will do that.<br></div><div>=C2=A0</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 style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Btw in number of deployments UDP is blo=
cked in the fabric or on TORs by ACLs at the interface level. So to make su=
re this works folks need to punch wholes in the ACLs.=C2=A0</div></div></bl=
ockquote><div><br></div><div>#NT: IMO this is irrelevant in the context of =
the draft. It&#39;s an operational issue for those specific deployments and=
 a much simpler one to address than asking someone to run yet another proto=
col if the functionality could be provided by enhancing the existing one th=
ey run. That&#39;s my take on that.<br></div><div>=C2=A0</div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;=
padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small"><br></div><div style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Last it is often the case today - when r=
unning no overlay - to advertise dynamically VMs or LXCs addresses to TORs =
via routing protocol - say BGP. What happens when now the LXCs or VMs will =
start sending such BGP Hellos directly to TORs ? Do you envision that this =
proposal will automatically establish BGP sessions with those tenant entiti=
es if they happen to be on the same subnet then compute node itself ?=C2=A0=
</div></div></blockquote><div><br></div><div>#NT: Do you need to enable suc=
h functionality on the VMs or LXCs?<br></div><div>=C2=A0</div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;=
padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small"><br></div><div style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Bottom line is that we do not know reall=
y what complete set of functionality (both intended and accidental) are we =
having the WG acceptance call for. The document is missing so much text tha=
t at this stage IMO it is not eligible for any IETF WG adoption pool.=C2=A0=
</div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">Thx,</div><div style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">R.</div></div>
</blockquote></div><br></div></div>

--000000000000e741de0570e6a132--


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References: <013701d41227$579d2d10$06d78730$@ndzh.com> <6ACB426F-D10D-43E2-BC12-2D41D0CCE88A@arrcus.com> <CA+R4MGeh=+e4FvPfeGzd-4UnxuPiwHHEMEKuieXZOTitVYHm2A@mail.gmail.com> <CA+b+ERmAHwKY8x0jH6Pk9Svu1BQFDxrG2ozQO97VHWV=jXtHqA@mail.gmail.com> <CA+R4MGcoer=tAVCPPYTsXp-DtiO1cxArxJA=iAMsJ_A_LmzrhA@mail.gmail.com>
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Cc: Keyur Patel <keyur@arrcus.com>, "idr@ietf.org" <idr@ietf.org>,  "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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--000000000000d1ee020570e6d9a0
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> =E2=80=8B> =E2=80=8B
> The draft needs work to spell out what the intention is in areas of
> concern and we will do that.
>

=E2=80=8BI don't think this is only about spelling out intentions. It is mo=
re about
adding actual mechanisms to prevent not intended by authors accidental use
cases.

=E2=80=8B

> #NT: IMO this is irrelevant in the context of the draft. It's an
> operational issue for those specific deployments and a much simpler one t=
o
> address than asking someone to run yet another protocol if the
> functionality could be provided by enhancing the existing one they run.
> That's my take on that.
>

=E2=80=8BSure you can do that. But perhaps someone could just explain what =
is so
difficult in configuring your TORs and SPINEs with provisioning tool ? Why
in DC there is need for this automation in BGP ?

Besides if you plan your addressing in the fabric correctly the peering
addresses to use both on direct p2p EBGP sessions or between loopbacks
(including resolving connected routes) can be all easily automated today
without single hello message exchanged.

The BGP Hellos may help those who randomly assign fabric address plan - but
is this really something we need to spend IDR WG time on ?

As stated in vast majority of DC fabrics there is no need for BGP at all,
but if there is group of folks who think otherwise why not to just
carve-out what is necessary for DC-BGP from BGP, write it up in new RFC as
new protocol and deal with it in DC dedicated WGs ?

Thx,
R.

--000000000000d1ee020570e6d9a0
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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div=
>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"=
gmail_extra"><div class=3D"gmail_quote"><div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small;display:inli=
ne">=E2=80=8B&gt; =E2=80=8B</div>The draft needs work to spell out what the=
 intention is in areas of concern and we will do that.<br></div></div></div=
></div></blockquote><div><br></div><div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=80=8BI don&=
#39;t think this is only about spelling out intentions. It is more about ad=
ding actual mechanisms to prevent not intended by authors accidental use ca=
ses.</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=80=8B</div>=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-l=
eft:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_e=
xtra"><div class=3D"gmail_quote"><span class=3D""><div>#NT: IMO this is irr=
elevant in the context of the draft. It&#39;s an operational issue for thos=
e specific deployments and a much simpler one to address than asking someon=
e to run yet another protocol if the functionality could be provided by enh=
ancing the existing one they run. That&#39;s my take on that.<br></div></sp=
an></div></div></div></blockquote><div><br></div><div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
=E2=80=8BSure you can do that. But perhaps someone could just explain what =
is so difficult in configuring your TORs and SPINEs with provisioning tool =
? Why in DC there is need for this automation in BGP ?=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">Besides if you plan your addressing =
in the fabric correctly the peering addresses to use both on direct p2p EBG=
P sessions or between loopbacks (including resolving connected routes) can =
be all easily automated today without single hello message exchanged.=C2=A0=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">The BGP Hellos may he=
lp those who randomly assign fabric address plan - but is this really somet=
hing we need to spend IDR WG time on ?=C2=A0</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">As stated in vast majority of DC fabrics there is no=
 need for BGP at all, but if there is group of folks who think otherwise wh=
y not to just carve-out what is necessary for DC-BGP from BGP, write it up =
in new RFC as new protocol and deal with it in DC dedicated WGs ?=C2=A0</di=
v></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small">Thx,<br>R.</div></d=
iv></div></div>

--000000000000d1ee020570e6d9a0--


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From: Abhay Roy <abhay@arrcus.com>
To: Gunter Van De Velde <guntervandeveldecc=40icloud.com@dmarc.ietf.org>
CC: "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>, Keyur Patel <keyur@arrcus.com>, "lsvr@ietf.com" <lsvr@ietf.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/3etYIRPVfFv1ieOAteacOo4RAQ4>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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To: Abhay Roy <abhay@arrcus.com>, Gunter Van De Velde <guntervandeveldecc=40icloud.com@dmarc.ietf.org>
Cc: "idr@ietf.org" <idr@ietf.org>, Keyur Patel <keyur@arrcus.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "lsvr@ietf.com" <lsvr@ietf.com>, "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>, Susan Hares <shares@ndzh.com>
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From: Ahmed Bashandy <abashandy.ietf@gmail.com>
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Date: Fri, 13 Jul 2018 15:17:50 -0700
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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I concur.

I think we should wait few days for face-to-face meetings

Ahmed



On 7/13/18 3:13 PM, Abhay Roy wrote:
> +1
>
> I do see it getting a lot of discussion time next week in LSVR agenda:
>
> https://datatracker.ietf.org/meeting/102/materials/agenda-102-lsvr-02
>
> (The subject doc is also on the agenda)
>
> So will vote to wait just a little bit more before deciding the path 
> forward on auto-discovery approach.
>
> Regards,
> -Abhay
>
>
>
>
>> On Jul 13, 2018, at 10:19 AM, Gunter Van De Velde 
>> <guntervandeveldecc=40icloud.com@dmarc.ietf.org 
>> <mailto:guntervandeveldecc=40icloud.com@dmarc.ietf.org>> wrote:
>>
>> +1
>>
>> Next week LSVR WG will have a discussion detailing auto-discovery 
>> problem-space/requirements.
>> Properties as e.g. scaling, simplicity and generic usability are 
>> taken into consideration.
>>
>> imo it seems too early to adopt/settle on a solution, while we have 
>> options available ("create something new", "augment something 
>> existing" or "reuse something existing")
>>
>> G/
>>
>>
>>
>>> On 13 Jul 2018, at 16:13, Acee Lindem (acee) 
>>> <acee=40cisco.com@dmarc.ietf.org 
>>> <mailto:acee=40cisco.com@dmarc.ietf.org>> wrote:
>>>
>>> Hi Sue, et al,
>>> I donâ€™t think we should settle on this auto-discovery mechanism at 
>>> this point just because they were the first to ask for adoption. 
>>> Â There are trade-offs Â for the various auto-discovery techniques as 
>>> mentioned in the thread.
>>> Thanks,
>>> Acee
>>> *From:*Idr <idr-bounces@ietf.org <mailto:idr-bounces@ietf.org>> on 
>>> behalf of Keyur Patel <keyur@arrcus.com <mailto:keyur@arrcus.com>>
>>> *Date:*Friday, July 13, 2018 at 1:44 AM
>>> *To:*Susan Hares <shares@ndzh.com <mailto:shares@ndzh.com>>, IDR 
>>> List <idr@ietf.org <mailto:idr@ietf.org>>
>>> *Cc:*"draft-xu-idr-neighbor-autodiscovery@ietf.org 
>>> <mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>" 
>>> <draft-xu-idr-neighbor-autodiscovery@ietf.org 
>>> <mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>>
>>> *Subject:*Re: [Idr] WG adoption call for 
>>> draft-xu-idr-neighbor-autodiscovery
>>> Hi Sue,
>>> While I think the BGP discovery work is import, I donâ€™t think WG 
>>> should adopt this document at this time. Â My answers are further 
>>> inlined #Keyur.
>>> *From:*Idr <idr-bounces@ietf.org <mailto:idr-bounces@ietf.org>> on 
>>> behalf of Susan Hares <shares@ndzh.com <mailto:shares@ndzh.com>>
>>> *Date:*Monday, July 2, 2018 at 11:10 AM
>>> *To:*"idr@ietf.org <mailto:idr@ietf.org>" <idr@ietf.org 
>>> <mailto:idr@ietf.org>>
>>> *Cc:*"draft-xu-idr-neighbor-autodiscovery@ietf.org 
>>> <mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>" 
>>> <draft-xu-idr-neighbor-autodiscovery@ietf.org 
>>> <mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org>>
>>> *Subject:*[Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
>>> Greetings:
>>> This begins a 2 week WG adoption call for 
>>> draft-xu-idr-neighbor-autodiscovery (July 2 â€“ July 16).
>>> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
>>> The authors of this draft should send their IPR statements in 
>>> response to this email. Â I hope the authors will ihelp their 
>>> vacationing co-authors to respond by July 7^th .
>>> The WG should consider the following:
>>> 1)Does BGP need to have an autodiscovery mechanism for peers within 
>>> Data Centers?
>>> #Keyur: Yes.
>>> 2)Does this mechanism work for other deployments?
>>> #Keyur: Yes.
>>> 3)If so, should be passed in BGP Hello message?
>>> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
>>> #Keyur:Â  It should not be included in BGP (or any BGP Hello 
>>> messages). Â Any such mechanism within BGP will 1) conflict with 
>>> existing keepalives and 2) impose scale issues when it comes to 
>>> supporting large number of BGP peers.
>>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  My suggestion is to implement discovery mechanism 
>>> outside BGP.
>>> 4)Does this interact with any of the LSVR work?
>>> #Keyur: Yes it does.
>>> Regards,
>>> Keyur
>>> I want to thank the authors for their patience while we sorted 
>>> through some of the WG LC for other drafts.Â  We decided to wait 
>>> until some of those discussion were cleared up prior to starting a 
>>> new WG Adoption call.
>>> Susan Hares
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org <mailto:Idr@ietf.org>
>>> https://www.ietf.org/mailman/listinfo/idr
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org <mailto:Idr@ietf.org>
>> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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    <p>I concur. <br>
    </p>
    <p>I think we should wait few days for face-to-face meetings</p>
    <p>Ahmed</p>
    <p><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 7/13/18 3:13 PM, Abhay Roy wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:32B41109-9678-4BDB-B619-EE1B336441CC@arrcus.com">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      +1
      <div class=""><br class="">
      </div>
      <div class="">I do see it getting a lot of discussion time next
        week in LSVR agenda:</div>
      <div class=""><br class="">
      </div>
      <div class=""><a
href="https://datatracker.ietf.org/meeting/102/materials/agenda-102-lsvr-02"
          class="" moz-do-not-send="true">https://datatracker.ietf.org/meeting/102/materials/agenda-102-lsvr-02</a></div>
      <div class=""><br class="">
      </div>
      <div class="">(The subject doc is also on the agenda)</div>
      <div class=""><br class="">
      </div>
      <div class="">So will vote to wait just a little bit more before
        deciding the path forward on auto-discovery approach.Â </div>
      <div class=""><br class="">
        <div class="">
          <div dir="auto" style="word-wrap: break-word;
            -webkit-nbsp-mode: space; line-break: after-white-space;"
            class="">
            <div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);
              font-family: Helvetica; font-size: 12px; font-style:
              normal; font-variant-caps: normal; font-weight: normal;
              letter-spacing: normal; text-align: start; text-indent:
              0px; text-transform: none; white-space: normal;
              word-spacing: 0px; -webkit-text-stroke-width: 0px;
              text-decoration: none;">
              Regards,</div>
            <div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);
              font-family: Helvetica; font-size: 12px; font-style:
              normal; font-variant-caps: normal; font-weight: normal;
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              0px; text-transform: none; white-space: normal;
              word-spacing: 0px; -webkit-text-stroke-width: 0px;
              text-decoration: none;">
              -Abhay</div>
            <div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);
              font-family: Helvetica; font-size: 12px; font-style:
              normal; font-variant-caps: normal; font-weight: normal;
              letter-spacing: normal; text-align: start; text-indent:
              0px; text-transform: none; white-space: normal;
              word-spacing: 0px; -webkit-text-stroke-width: 0px;
              text-decoration: none;" class="">
              <br class="">
            </div>
            <br class="Apple-interchange-newline">
          </div>
          <br class="Apple-interchange-newline">
        </div>
        <div><br class="">
          <blockquote type="cite" class="">
            <div class="">On Jul 13, 2018, at 10:19 AM, Gunter Van De
              Velde &lt;<a
                href="mailto:guntervandeveldecc=40icloud.com@dmarc.ietf.org"
                class="" moz-do-not-send="true">guntervandeveldecc=40icloud.com@dmarc.ietf.org</a>&gt;
              wrote:</div>
            <br class="Apple-interchange-newline">
            <div class="">
              <div style="word-wrap: break-word; -webkit-nbsp-mode:
                space; line-break: after-white-space;" class="">
                +1
                <div class=""><br class="">
                </div>
                <div class="">Next week LSVR WG will have a discussion
                  detailing auto-discovery problem-space/requirements.Â </div>
                <div class="">Properties as e.g. scaling, simplicity and
                  generic usability are taken into consideration.</div>
                <div class=""><br class="">
                </div>
                <div class="">imo it seems too early to adopt/settle on
                  a solution, while we have options available ("create
                  something new", "augment something existing" or "reuse
                  something existing")</div>
                <div class=""><br class="">
                </div>
                <div class="">G/</div>
                <div class=""><br class="">
                </div>
                <div class=""><br class="">
                </div>
                <div class="">
                  <div class=""><br class="">
                    <blockquote type="cite" class="">
                      <div class="">On 13 Jul 2018, at 16:13, Acee
                        Lindem (acee) &lt;<a
                          href="mailto:acee=40cisco.com@dmarc.ietf.org"
                          class="" moz-do-not-send="true">acee=40cisco.com@dmarc.ietf.org</a>&gt;
                        wrote:</div>
                      <br class="Apple-interchange-newline">
                      <div class="">
                        <div class="WordSection1" style="page:
                          WordSection1; caret-color: rgb(0, 0, 0);
                          font-family: Helvetica; font-size: 12px;
                          font-style: normal; font-variant-caps: normal;
                          font-weight: normal; letter-spacing: normal;
                          text-align: start; text-indent: 0px;
                          text-transform: none; white-space: normal;
                          word-spacing: 0px; -webkit-text-stroke-width:
                          0px; text-decoration: none;">
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class="">Hi
                              Sue, et al,<span
                                class="Apple-converted-space">Â </span><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class=""><o:p
                                class="">Â </o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class="">I
                              donâ€™t think we should settle on this
                              auto-discovery mechanism at this point
                              just because they were the first to ask
                              for adoption. Â There are trade-offs Â for
                              the various auto-discovery techniques as
                              mentioned in the thread.<span
                                class="Apple-converted-space">Â </span><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class=""><o:p
                                class="">Â </o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class="">Thanks,<o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class="">Acee<o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span style="font-size: 12pt;" class=""><o:p
                                class="">Â </o:p></span></div>
                          <div style="border-style: solid none none;
                            border-top-width: 1pt; border-top-color:
                            rgb(181, 196, 223); padding: 3pt 0in 0in;"
                            class="">
                            <div style="margin: 0in 0in 0.0001pt 0.5in;
                              font-size: 11pt; font-family: Calibri,
                              sans-serif;" class="">
                              <b class=""><span style="font-size: 12pt;"
                                  class="">From:<span
                                    class="Apple-converted-space">Â </span></span></b><span
                                style="font-size: 12pt;" class="">Idr
                                &lt;<a
                                  href="mailto:idr-bounces@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">idr-bounces@ietf.org</a>&gt;
                                on behalf of Keyur Patel &lt;<a
                                  href="mailto:keyur@arrcus.com"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">keyur@arrcus.com</a>&gt;<br
                                  class="">
                                <b class="">Date:<span
                                    class="Apple-converted-space">Â </span></b>Friday,
                                July 13, 2018 at 1:44 AM<br class="">
                                <b class="">To:<span
                                    class="Apple-converted-space">Â </span></b>Susan
                                Hares &lt;<a
                                  href="mailto:shares@ndzh.com"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">shares@ndzh.com</a>&gt;,
                                IDR List &lt;<a
                                  href="mailto:idr@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">idr@ietf.org</a>&gt;<br
                                  class="">
                                <b class="">Cc:<span
                                    class="Apple-converted-space">Â </span></b>"<a
href="mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" style="color:
                                  purple; text-decoration: underline;"
                                  class="" moz-do-not-send="true">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>"
                                &lt;<a
                                  href="mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>&gt;<br
                                  class="">
                                <b class="">Subject:<span
                                    class="Apple-converted-space">Â </span></b>Re:
                                [Idr] WG adoption call for
                                draft-xu-idr-neighbor-autodiscovery<o:p
                                  class=""></o:p></span></div>
                          </div>
                          <div class="">
                            <div style="margin: 0in 0in 0.0001pt 0.5in;
                              font-size: 11pt; font-family: Calibri,
                              sans-serif;" class="">
                              <o:p class="">Â </o:p></div>
                          </div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            Hi Sue,<o:p class=""></o:p></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            Â <o:p class=""></o:p></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            While I think the BGP discovery work is
                            import, I donâ€™t think WG should adopt this
                            document at this time. Â My answers are
                            further inlined #Keyur.<o:p class=""></o:p></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            Â <o:p class=""></o:p></div>
                          <div style="border-style: solid none none;
                            border-top-width: 1pt; border-top-color:
                            rgb(181, 196, 223); padding: 3pt 0in 0in;"
                            class="">
                            <div style="margin: 0in 0in 0.0001pt 0.5in;
                              font-size: 11pt; font-family: Calibri,
                              sans-serif;" class="">
                              <b class=""><span style="font-size: 12pt;"
                                  class="">From:<span
                                    class="Apple-converted-space">Â </span></span></b><span
                                style="font-size: 12pt;" class="">Idr
                                &lt;<a
                                  href="mailto:idr-bounces@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">idr-bounces@ietf.org</a>&gt;
                                on behalf of Susan Hares &lt;<a
                                  href="mailto:shares@ndzh.com"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">shares@ndzh.com</a>&gt;<br
                                  class="">
                                <b class="">Date:<span
                                    class="Apple-converted-space">Â </span></b>Monday,
                                July 2, 2018 at 11:10 AM<br class="">
                                <b class="">To:<span
                                    class="Apple-converted-space">Â </span></b>"<a
                                  href="mailto:idr@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">idr@ietf.org</a>"
                                &lt;<a href="mailto:idr@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">idr@ietf.org</a>&gt;<br
                                  class="">
                                <b class="">Cc:<span
                                    class="Apple-converted-space">Â </span></b>"<a
href="mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" style="color:
                                  purple; text-decoration: underline;"
                                  class="" moz-do-not-send="true">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>"
                                &lt;<a
                                  href="mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org"
                                  style="color: purple; text-decoration:
                                  underline;" class=""
                                  moz-do-not-send="true">draft-xu-idr-neighbor-autodiscovery@ietf.org</a>&gt;<br
                                  class="">
                                <b class="">Subject:<span
                                    class="Apple-converted-space">Â </span></b>[Idr]
                                WG adoption call for
                                draft-xu-idr-neighbor-autodiscovery</span><o:p
                                class=""></o:p></div>
                          </div>
                          <div class="">
                            <div style="margin: 0in 0in 0.0001pt 0.5in;
                              font-size: 11pt; font-family: Calibri,
                              sans-serif;" class="">
                              Â <o:p class=""></o:p></div>
                          </div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <a name="_MailOriginalBody" class=""
                              moz-do-not-send="true">Greetings:<o:p
                                class=""></o:p></a></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">This begins a 2 week WG
                              adoption call for
                              draft-xu-idr-neighbor-autodiscovery (July
                              2 â€“ July 16).Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class=""></span><a
href="https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/"
                              style="color: purple; text-decoration:
                              underline;" class=""
                              moz-do-not-send="true"><span class="">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/</span><span
                                class=""></span></a><span class=""><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">The authors of this draft
                              should send their IPR statements in
                              response to this email. Â I hope the
                              authors will ihelp their vacationing
                              co-authors to respond by July 7<sup
                                class="">th</sup>.Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">The WG should consider the
                              following:<o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 1in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif; text-indent: -0.25in;" class="">
                            <span class=""><span class="">1)<span
                                  style="font-style: normal;
                                  font-variant-caps: normal;
                                  font-weight: normal; font-stretch:
                                  normal; font-size: 7pt; line-height:
                                  normal; font-family: &quot;Times New
                                  Roman&quot;;" class="">Â Â Â Â Â <span
                                    class="Apple-converted-space">Â </span></span></span>Does
                              BGP need to have an autodiscovery
                              mechanism for peers within Data Centers?<o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">#Keyur: Yes.<o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 1in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif; text-indent: -0.25in;" class="">
                            <span class=""><span class="">2)<span
                                  style="font-style: normal;
                                  font-variant-caps: normal;
                                  font-weight: normal; font-stretch:
                                  normal; font-size: 7pt; line-height:
                                  normal; font-family: &quot;Times New
                                  Roman&quot;;" class="">Â Â Â Â Â <span
                                    class="Apple-converted-space">Â </span></span></span>Does
                              this mechanism work for other deployments?<span
                                class="Apple-converted-space">Â </span><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 1in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">#Keyur: Yes.<o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 1in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif; text-indent: -0.25in;" class="">
                            <span class=""><span class="">3)<span
                                  style="font-style: normal;
                                  font-variant-caps: normal;
                                  font-weight: normal; font-stretch:
                                  normal; font-size: 7pt; line-height:
                                  normal; font-family: &quot;Times New
                                  Roman&quot;;" class="">Â Â Â Â Â <span
                                    class="Apple-converted-space">Â </span></span></span>If
                              so, should be passed in BGP Hello
                              message?Â <span
                                class="Apple-converted-space">Â </span><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 1in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Or should it be a part of
                              another protocol (e.g. LLDP, BFD, etc).<o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">#Keyur:Â  It should not be
                              included in BGP (or any BGP Hello
                              messages). Â Any such mechanism within BGPÂ 
                              will 1) conflict with existing keepalives
                              and 2) impose scale issues when it comes
                              to supporting large number of BGP peers.<span
                                class="Apple-converted-space">Â </span><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  My suggestion
                              is to implement discovery mechanism
                              outside BGP.<o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 1in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif; text-indent: -0.25in;" class="">
                            <span class=""><span class="">4)<span
                                  style="font-style: normal;
                                  font-variant-caps: normal;
                                  font-weight: normal; font-stretch:
                                  normal; font-size: 7pt; line-height:
                                  normal; font-family: &quot;Times New
                                  Roman&quot;;" class="">Â Â Â Â Â <span
                                    class="Apple-converted-space">Â </span></span></span>Does
                              this interact with any of the LSVR work?<span
                                class="Apple-converted-space">Â </span><o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">#Keyur: Yes it does.<o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Regards,<o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Keyur<o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">I want to thank the authors
                              for their patience while we sorted through
                              some of the WG LC for other drafts.Â  We
                              decided to wait until some of those
                              discussion were cleared up prior to
                              starting a new WG Adoption call.<o:p
                                class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Â <o:p class=""></o:p></span></div>
                          <div style="margin: 0in 0in 0.0001pt 0.5in;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">
                            <span class="">Susan Hares<o:p class=""></o:p></span></div>
                        </div>
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Date: Fri, 13 Jul 2018 15:52:21 -0700
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Hi,

my vote is no at this time.

would be more in favor of a generic discovery mechanism that addresses a
wider set of use cases as opposed to overloading BGP. seems a bit premature
to move forward with adoption at this time, without proper discussion on
that front.

Thanks,
Neeraj


 <https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/>

 <https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/>

 <https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/>

 <https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/>

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<div dir=3D"ltr"><br><div>Hi,</div><div><br></div><div>my vote is no at thi=
s time.</div><div><br></div><div>would be more in favor of a generic discov=
ery mechanism that addresses a wider set of use cases as opposed to overloa=
ding BGP. seems a bit premature to move forward with adoption at this time,=
 without proper discussion on that front.</div><div><br></div><div>Thanks,<=
/div><div>Neeraj</div><div><br></div><div><br></div><div><pre class=3D"gmai=
l-wordwrap" style=3D"box-sizing:border-box;overflow:auto;font-family:Menlo,=
Monaco,Consolas,&quot;Courier New&quot;,monospace;font-size:13px;padding:0p=
x;margin-top:0px;margin-bottom:10px;line-height:1.42857143;word-break:norma=
l;word-wrap:normal;color:rgb(51,51,51);border:0px none black;border-top-lef=
t-radius:4px;border-top-right-radius:4px;border-bottom-right-radius:4px;bor=
der-bottom-left-radius:4px;white-space:pre-wrap"><a href=3D"https://datatra=
cker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/" rel=3D"nofollow" st=
yle=3D"box-sizing:border-box;background-color:transparent;color:rgb(51,122,=
183);text-decoration:none"></a></pre><pre class=3D"gmail-wordwrap" style=3D=
"box-sizing:border-box;overflow:auto;font-family:Menlo,Monaco,Consolas,&quo=
t;Courier New&quot;,monospace;font-size:13px;padding:0px;margin-top:0px;mar=
gin-bottom:10px;line-height:1.42857143;word-break:normal;word-wrap:normal;c=
olor:rgb(51,51,51);border:0px none black;border-top-left-radius:4px;border-=
top-right-radius:4px;border-bottom-right-radius:4px;border-bottom-left-radi=
us:4px;white-space:pre-wrap"><a href=3D"https://datatracker.ietf.org/doc/dr=
aft-xu-idr-neighbor-autodiscovery/" rel=3D"nofollow" style=3D"box-sizing:bo=
rder-box;background-color:transparent;color:rgb(51,122,183);text-decoration=
:none"></a></pre><pre class=3D"gmail-wordwrap" style=3D"box-sizing:border-b=
ox;overflow:auto;font-family:Menlo,Monaco,Consolas,&quot;Courier New&quot;,=
monospace;font-size:13px;padding:0px;margin-top:0px;margin-bottom:10px;line=
-height:1.42857143;word-break:normal;word-wrap:normal;color:rgb(51,51,51);b=
order:0px none black;border-top-left-radius:4px;border-top-right-radius:4px=
;border-bottom-right-radius:4px;border-bottom-left-radius:4px;white-space:p=
re-wrap"><a href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-=
autodiscovery/" rel=3D"nofollow" style=3D"box-sizing:border-box;background-=
color:transparent;color:rgb(51,122,183);text-decoration:none"></a></pre><pr=
e class=3D"gmail-wordwrap" style=3D"box-sizing:border-box;overflow:auto;fon=
t-family:Menlo,Monaco,Consolas,&quot;Courier New&quot;,monospace;font-size:=
13px;padding:0px;margin-top:0px;margin-bottom:10px;line-height:1.42857143;w=
ord-break:normal;word-wrap:normal;color:rgb(51,51,51);border:0px none black=
;border-top-left-radius:4px;border-top-right-radius:4px;border-bottom-right=
-radius:4px;border-bottom-left-radius:4px;white-space:pre-wrap"><a href=3D"=
https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/" rel=
=3D"nofollow" style=3D"box-sizing:border-box;background-color:transparent;c=
olor:rgb(51,122,183);text-decoration:none"></a></pre><br class=3D"gmail-App=
le-interchange-newline" style=3D"color:rgb(0,0,0);font-family:-webkit-stand=
ard"></div></div>

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From nobody Fri Jul 13 19:53:14 2018
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From: Randy Bush <randy@psg.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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> Fully agree with Nikos' opinions. The DC world comes in many flavors,
> I believe the coauthors and contributors of this draft from MSDC
> operators know well about what they really need.
> 
> The BGP neighbor auto-discovery mechanism as described in this draft
> is mainly intended for the MSDCs following the eBGP-only design as
> recommended by RFC7938. This eBGP-only design will be kept for a long
> period of time unless they saw a STRONG and REAL benefit of deploying
> link-state protocols. Therefore, it's worthwhile to enhance the
> automation and simplification in the deployment of the eBGP-only MSDC
> fabric.
> 
> It may be useful to consider the applicability in the LSVR provided
> LSVR had a chance to be widely deployed in future even though there
> has been many link-state protocol proposals for MSDC CLOS networks
> which are either built on the proven IS-IS/OSPF protocols or built on
> totally-new designs for wider purposes.

ad they do not scale, just as making bgp as noisy as an igp.  i hope all
iij's dc competitors do that.  great idea!

randy


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Subject: [Idr] The IDR WG has placed draft-xu-idr-neighbor-autodiscovery in state "Candidate for WG Adoption"
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The IDR WG has placed draft-xu-idr-neighbor-autodiscovery in state
Candidate for WG Adoption (entered by Susan Hares)

The document is available at
https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/


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From: Nikos Triantafillis <ntriantafillis@gmail.com>
Date: Sat, 14 Jul 2018 16:49:46 +0300
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To: Robert Raszuk <robert@raszuk.net>
Cc: "idr@ietf.org" <idr@ietf.org>,  "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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--000000000000953e050570f5de13
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Inline.

On Fri, Jul 13, 2018 at 10:54 PM, Robert Raszuk <robert@raszuk.net> wrote:

>
>
>> =E2=80=8B> =E2=80=8B
>> The draft needs work to spell out what the intention is in areas of
>> concern and we will do that.
>>
>
> =E2=80=8BI don't think this is only about spelling out intentions. It is =
more
> about adding actual mechanisms to prevent not intended by authors
> accidental use cases.
>

"prevent not intended by authors accidental use cases" - if you have
security concerns, please bring them up for discussion.
 =E2=80=8B

> #NT: IMO this is irrelevant in the context of the draft. It's an
>> operational issue for those specific deployments and a much simpler one =
to
>> address than asking someone to run yet another protocol if the
>> functionality could be provided by enhancing the existing one they run.
>> That's my take on that.
>>
>
> =E2=80=8BSure you can do that. But perhaps someone could just explain wha=
t is so
> difficult in configuring your TORs and SPINEs with provisioning tool ? Wh=
y
> in DC there is need for this automation in BGP ?
>

Because different people operate their DCs differently. That should be a
good enough reason and we shouldn't be dictating in this or any other group
how operators should be configuring or provisioning their DCs :-)

Besides if you plan your addressing in the fabric correctly the peering
> addresses to use both on direct p2p EBGP sessions or between loopbacks
> (including resolving connected routes) can be all easily automated today
> without single hello message exchanged.
>
> The BGP Hellos may help those who randomly assign fabric address plan -
> but is this really something we need to spend IDR WG time on ?
>

IDR WG shouldn't dictate how operators should run their DCs.


> As stated in vast majority of DC fabrics there is no need for BGP at all,
> but if there is group of folks who think otherwise why not to just
> carve-out what is necessary for DC-BGP from BGP, write it up in new RFC a=
s
> new protocol and deal with it in DC dedicated WGs ?
>

That's one view. The other is the ask to enhance what is already out there
and deployed to suit the needs of DC operators.

Regards,

Nikos.-

Thx,
> R.
>

--000000000000953e050570f5de13
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr">Inline.<br><div class=3D"gmail_extra"><br><div class=3D"gm=
ail_quote">On Fri, Jul 13, 2018 at 10:54 PM, Robert Raszuk <span dir=3D"ltr=
">&lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.=
net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr=
"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><span class=3D""><d=
iv>=C2=A0</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 class=
=3D"gmail_extra"><div class=3D"gmail_quote"><div><div style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small;display:inline">=E2=80=8B&gt; =
=E2=80=8B</div>The draft needs work to spell out what the intention is in a=
reas of concern and we will do that.<br></div></div></div></div></blockquot=
e><div><br></div></span><div><div style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">=E2=80=8BI don&#39;t think this is only about spell=
ing out intentions. It is more about adding actual mechanisms to prevent no=
t intended by authors accidental use cases.</div></div></div></div></div></=
blockquote><div><br></div><div>&quot;prevent not intended by authors accide=
ntal use cases&quot; - if you have security concerns, please bring them up =
for discussion.</div><div style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small">=C2=A0=E2=80=8B</div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div di=
r=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><span class=
=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-l=
eft:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_e=
xtra"><div class=3D"gmail_quote"><span><div>#NT: IMO this is irrelevant in =
the context of the draft. It&#39;s an operational issue for those specific =
deployments and a much simpler one to address than asking someone to run ye=
t another protocol if the functionality could be provided by enhancing the =
existing one they run. That&#39;s my take on that.<br></div></span></div></=
div></div></blockquote><div><br></div></span><div><div style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small">=E2=80=8BSure you can do that.=
 But perhaps someone could just explain what is so difficult in configuring=
 your TORs and SPINEs with provisioning tool ? Why in DC there is need for =
this automation in BGP ?=C2=A0</div></div></div></div></div></blockquote><d=
iv><br></div><div>Because different people operate their DCs differently. T=
hat should be a good enough reason and we shouldn&#39;t be dictating in thi=
s or any other group how operators should be configuring or provisioning th=
eir DCs :-)<br></div><div><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 class=3D"gmail_extra"><div class=3D"gmail_quote"><div><div st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small">Besides if y=
ou plan your addressing in the fabric correctly the peering addresses to us=
e both on direct p2p EBGP sessions or between loopbacks (including resolvin=
g connected routes) can be all easily automated today without single hello =
message exchanged.=C2=A0</div><div style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">The BGP Hellos may help those who randomly as=
sign fabric address plan - but is this really something we need to spend ID=
R WG time on ?=C2=A0</div></div></div></div></div></blockquote><div><br></d=
iv><div>IDR WG shouldn&#39;t dictate how operators should run their DCs.<br=
></div><div>=C2=A0</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"><di=
v class=3D"gmail_extra"><div class=3D"gmail_quote"><div><div style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">As stated in vast majori=
ty of DC fabrics there is no need for BGP at all, but if there is group of =
folks who think otherwise why not to just carve-out what is necessary for D=
C-BGP from BGP, write it up in new RFC as new protocol and deal with it in =
DC dedicated WGs ?</div></div></div></div></div></blockquote><div><br></div=
><div>That&#39;s one view. The other is the ask to enhance what is already =
out there and deployed to suit the needs of DC operators.<br></div><div>=C2=
=A0</div><div>Regards,</div><div><br></div><div>Nikos.-<br></div><div><br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_ex=
tra"><div class=3D"gmail_quote"><div style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">Thx,<br>R.</div></div></div></div>
</blockquote></div><br></div></div>

--000000000000953e050570f5de13--


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Subject: [Idr] [Editorial Errata Reported] RFC4271 (5421)
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The following errata report has been submitted for RFC4271,
"A Border Gateway Protocol 4 (BGP-4)".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata/eid5421

--------------------------------------
Type: Editorial
Reported by: Greg Skinner <gregskinner0@icloud.com>

Section: 8.2.2

Original Text
-------------
If the local system receives a KeepaliveTimer_Expires event (Event
      11), the local system:

        - sends a KEEPALIVE message,

        - restarts the KeepaliveTimer, and

        - remains in the OpenConfirmed state.

Corrected Text
--------------
If the local system receives a KeepaliveTimer_Expires event (Event
      11), the local system:

        - sends a KEEPALIVE message,

        - restarts the KeepaliveTimer, and

        - remains in the OpenConfirm state.

Notes
-----


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. 

--------------------------------------
RFC4271 (draft-ietf-idr-bgp4-26)
--------------------------------------
Title               : A Border Gateway Protocol 4 (BGP-4)
Publication Date    : January 2006
Author(s)           : Y. Rekhter, Ed., T. Li, Ed., S. Hares, Ed.
Category            : DRAFT STANDARD
Source              : Inter-Domain Routing
Area                : Routing
Stream              : IETF
Verifying Party     : IESG


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: RFC Errata System <rfc-editor@rfc-editor.org>, "yakov@juniper.net" <yakov@juniper.net>, "tony.li@tony.li" <tony.li@tony.li>, "skh@nexthop.com" <skh@nexthop.com>, "db3546@att.com" <db3546@att.com>, "aretana.ietf@gmail.com" <aretana.ietf@gmail.com>, "martin.vigoureux@nokia.com" <martin.vigoureux@nokia.com>, "jgs@juniper.net" <jgs@juniper.net>, "shares@ndzh.com" <shares@ndzh.com>
CC: "gregskinner0@icloud.com" <gregskinner0@icloud.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] [Editorial Errata Reported] RFC4271 (5421)
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Date: Sun, 15 Jul 2018 12:33:22 +0000
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From: Lizhenbin <lizhenbin@huawei.com>
To: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
CC: "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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<p>Support for the WG adoption. BGP is widely used and simplifying the prov=
isioning is important and useful. The solution proposed in the draft can so=
lve the issue better. Moreover the solution should be better to be provided=
 by BGP's self. Dependency on other
 protocols may add unnecessary limitation.</p>
<p>&nbsp;</p>
<p>Best Regards,</p>
<p>Zhenbin(Robin)</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p><span style=3D"COLOR: #1f497d"></span>&nbsp;</p>
<div style=3D"FONT-SIZE: 16px; FONT-FAMILY: Times New Roman; COLOR: #000000=
">
<div>
<div class=3D"WordSection1">
<div>
<div style=3D"BORDER-TOP: #e1e1e1 1pt solid; BORDER-RIGHT: medium none; BOR=
DER-BOTTOM: medium none; PADDING-BOTTOM: 0cm; PADDING-TOP: 3pt; PADDING-LEF=
T: 0cm; BORDER-LEFT: medium none; PADDING-RIGHT: 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"ZH-CN" style=3D"FONT-FAMILY: &quot;=
=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif">=B7=A2=BC=FE=C8=CB</span></b><b>=
<span style=3D"FONT-FAMILY: &quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif=
">:</span></b><span style=3D"FONT-FAMILY: &quot;=CE=A2=C8=ED=D1=C5=BA=DA&qu=
ot;,sans-serif"> Idr [mailto:idr-bounces@ietf.org]
<b><span lang=3D"ZH-CN">=B4=FA=B1=ED </span></b>Susan Hares<br>
<b><span lang=3D"ZH-CN">=B7=A2=CB=CD=CA=B1=BC=E4</span>:</b> 2018<span lang=
=3D"ZH-CN">=C4=EA</span>7<span lang=3D"ZH-CN">=D4=C2</span>3<span lang=3D"Z=
H-CN">=C8=D5</span> 1:09<br>
<b><span lang=3D"ZH-CN">=CA=D5=BC=FE=C8=CB</span>:</b> idr@ietf.org<br>
<b><span lang=3D"ZH-CN">=B3=AD=CB=CD</span>:</b> draft-xu-idr-neighbor-auto=
discovery@ietf.org<br>
<b><span lang=3D"ZH-CN">=D6=F7=CC=E2</span>:</b> [Idr] WG adoption call for=
 draft-xu-idr-neighbor-autodiscovery</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Greetings: </p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">This begins a 2 week WG adoption call for draft-xu-i=
dr-neighbor-autodiscovery (July 2 =A8C July 16).&nbsp;
</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/doc/draft-xu=
-idr-neighbor-autodiscovery/" target=3D"_blank">https://datatracker.ietf.or=
g/doc/draft-xu-idr-neighbor-autodiscovery/</a></p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">The authors of this draft should send their IPR stat=
ements in response to this email. &nbsp;I hope the authors will ihelp their=
 vacationing co-authors to respond by July 7<sup>th</sup>.&nbsp;
</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">The WG should consider the following: </p>
<p class=3D"MsoListParagraph" style=3D"TEXT-INDENT: -18pt"><span>1)<span st=
yle=3D"FONT: 7pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;
</span></span>Does BGP need to have an autodiscovery mechanism for peers wi=
thin Data Centers?
</p>
<p class=3D"MsoListParagraph" style=3D"TEXT-INDENT: -18pt"><span>2)<span st=
yle=3D"FONT: 7pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;
</span></span>Does this mechanism work for other deployments? </p>
<p class=3D"MsoListParagraph">&nbsp;</p>
<p class=3D"MsoListParagraph" style=3D"TEXT-INDENT: -18pt"><span>3)<span st=
yle=3D"FONT: 7pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;
</span></span>If so, should be passed in BGP Hello message?&nbsp; </p>
<p class=3D"MsoListParagraph">Or should it be a part of another protocol (e=
..g. LLDP, BFD, etc).
</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoListParagraph" style=3D"TEXT-INDENT: -18pt"><span>4)<span st=
yle=3D"FONT: 7pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;
</span></span>Does this interact with any of the LSVR work? </p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">I want to thank the authors for their patience while=
 we sorted through some of the WG LC for other drafts.&nbsp; We decided to =
wait until some of those discussion were cleared up prior to starting a new=
 WG Adoption call.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Susan Hares </p>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8F45D82ADGGEMM532MBXchi_--


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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
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CC: "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: Draft IDR agenda posted
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fy-trim:punctuation">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">A remin=
der to the presenters:<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">Please =
send your presentation slides by Wednesday. 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">Best re=
gards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Jie<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>
<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" align=3D"left" style=3D"text-align:left"><b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sa=
ns-serif">=B7=A2=BC=FE=C8=CB<span lang=3D"EN-US">:</span></span></b><span l=
ang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif"> Idr [mailto:idr-bounces@ietf.org]
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif">=B4=FA=B1=ED </span>
</b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=
=C8=ED=D1=C5=BA=DA&quot;,sans-serif">Dongjie (Jimmy)<br>
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif">=B7=A2=CB=CD=CA=B1=BC=E4<span lang=3D"EN-US">:<=
/span></span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family=
:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif"> 2018</span><span style=
=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-=
serif">=C4=EA<span lang=3D"EN-US">7</span>=D4=C2<span lang=3D"EN-US">4</spa=
n>=C8=D5<span lang=3D"EN-US">
 8:17<br>
</span><b>=CA=D5=BC=FE=C8=CB<span lang=3D"EN-US">:</span></b><span lang=3D"=
EN-US"> idr@ietf.org<br>
</span><b>=B3=AD=CB=CD<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> idr-chairs@ietf.org<br>
</span><b>=D6=F7=CC=E2<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> [Idr] Draft IDR agenda posted<o:p></o:p></span></span></p>
</div>
</div>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all, <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The draft agenda of IDR session=
 is posted:
<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"><a href=3D"https://datatracker.=
ietf.org/meeting/102/materials/agenda-102-idr-00">https://datatracker.ietf.=
org/meeting/102/materials/agenda-102-idr-00</a><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"MsoPlainText"><span lang=3D"EN-US">Please let us know if you ha=
ve any problem with it.<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">Presenters, <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 prepare to send your sli=
des to me and CC the chairs. The deadline for slides is 24 hours prior to o=
ur first session (Thursday) , though earlier is better.
<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">And please take a look at the c=
hecklist for presenting at IDR:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://trac.tools.i=
etf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%20at%20an%20IDR%20mee=
ting">https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presen=
ting%20at%20an%20IDR%20meeting</a><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">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</body>
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--_000_76CD132C3ADEF848BD84D028D243C927A7070710NKGEML515MBXchi_--


From nobody Mon Jul 16 08:32:48 2018
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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 16 Jul 2018 17:32:31 +0200
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--000000000000bfa1b405711f8942
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*Hello Zhenbin,*

BGP is widely used and simplifying the provisioning is important and
> useful.
>
=E2=80=8B+

> Moreover the solution should be better to be provided by BGP's self.
>
=E2=80=8B+=E2=80=8B


> Dependency on other protocols may add unnecessary limitation.
>

=E2=80=8BWell I do agree with your above three comments above. But since
IMO draft-xu-idr-neighbor-autodiscovery goes way over the above points
opening pandora box with various TLVs, instead of keep arguing on the list
I wrote a small 3 page draft which does address the core issue of BGP build
in session auto setup in a fully automated way for both DCs or campus
deployments - yet without any risk of taking BGP on one more wild tracks
again.


*Hello Sue,*

Please kindly consider the below proposal as simple candidate solution for
the discussed problem at hand.

=E2=80=8B A new version of I-D, draft-raszuk-idr-bgp-auto-session-setup-00.=
txt
has been successfully submitted by Robert Raszuk and posted to the
IETF repository.

Name:           draft-raszuk-idr-bgp-auto-session-setup
Revision:       00
Title:          BGP Automated Session Setup (BGP-ASS)
Document date:  2018-07-16
Group:          Individual Submission
Pages:          6
URL:            https://www.ietf.org/internet-drafts/draft-raszuk-idr-bgp-
auto-session-setup-00.txt
Status:         https://datatracker.ietf.org/doc/draft-raszuk-idr-bgp-auto-
session-setup/
Htmlized:       https://tools.ietf.org/html/draft-raszuk-idr-bgp-auto-
session-setup-00
Htmlized:       https://datatracker.ietf.org/doc/html/draft-raszuk-idr-bgp-
auto-session-setup


Abstract:
   This document proposes a solution for BGP deployments in some
   specific environments to automatically establish BGP sessions without
   need for manual peer configuration.


Kind regards,
Robert.

--000000000000bfa1b405711f8942
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><b>Hello Zhenbin,</b></div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote"><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div lang=3D"EN-US"><div style=3D"direction:ltr;font=
-family:Tahoma;color:rgb(0,0,0);font-size:10pt"><p>BGP is widely used and s=
implifying the provisioning is important and useful.=C2=A0</p></div></div><=
/blockquote><div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">=E2=80=8B+</div></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 style=3D"directio=
n:ltr;font-family:Tahoma;color:rgb(0,0,0);font-size:10pt"><p> Moreover the =
solution should be better to be provided by BGP&#39;s self. </p></div></div=
></blockquote><div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small;display:inline">=E2=80=8B+=E2=80=8B</d=
iv>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=
=3D"EN-US"><div style=3D"direction:ltr;font-family:Tahoma;color:rgb(0,0,0);=
font-size:10pt"><p>Dependency on other
 protocols may add unnecessary limitation.</p></div></div></blockquote><div=
><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">=E2=80=8BWell I do agree with your above thre=
e comments above. But since IMO=C2=A0draft-xu-idr-neighbor-<wbr>autodiscove=
ry goes way over the above points opening pandora box with various TLVs, in=
stead of keep arguing on the list I wrote a small 3 page draft which does a=
ddress the core issue of BGP build in session auto setup in a fully automat=
ed way for both DCs or campus deployments - yet without any risk of taking =
BGP on one more wild tracks again.=C2=A0</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><b><br></b></div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small"><b>Hello Sue,</b></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">Please kindly consider t=
he below proposal as simple candidate solution for the discussed problem at=
 hand.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=80=8B

<span style=3D"font-family:arial,sans-serif;font-size:12.8px">A new version=
 of I-D, draft-raszuk-idr-bgp-auto-</span><wbr style=3D"font-family:arial,s=
ans-serif;font-size:12.8px"><span style=3D"font-family:arial,sans-serif;fon=
t-size:12.8px">session-setup-00.txt</span><br></div><div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><span style=3D"font-family:arial,sans-serif;font-size:12.8px;background-co=
lor:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:in=
itial;float:none;display:inline">has been successfully submitted by Robert =
Raszuk and posted to the</span><br style=3D"font-family:arial,sans-serif;fo=
nt-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:init=
ial;text-decoration-color:initial"><span style=3D"font-family:arial,sans-se=
rif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration-styl=
e:initial;text-decoration-color:initial;float:none;display:inline">IETF rep=
ository.</span><br style=3D"font-family:arial,sans-serif;font-size:12.8px;b=
ackground-color:rgb(255,255,255);text-decoration-style:initial;text-decorat=
ion-color:initial"><br style=3D"font-family:arial,sans-serif;font-size:12.8=
px;background-color:rgb(255,255,255);text-decoration-style:initial;text-dec=
oration-color:initial"><span style=3D"font-family:arial,sans-serif;font-siz=
e:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;te=
xt-decoration-color:initial;float:none;display:inline">Name:=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0draft-raszuk-idr-bgp-auto-</span><wbr style=3D"f=
ont-family:arial,sans-serif;font-size:12.8px;background-color:rgb(255,255,2=
55);text-decoration-style:initial;text-decoration-color:initial"><span styl=
e=3D"font-family:arial,sans-serif;font-size:12.8px;background-color:rgb(255=
,255,255);text-decoration-style:initial;text-decoration-color:initial;float=
:none;display:inline">session-setup</span><br style=3D"font-family:arial,sa=
ns-serif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration=
-style:initial;text-decoration-color:initial"><span style=3D"font-family:ar=
ial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial;float:none;display:inlin=
e">Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000</span><br style=3D"font-family:ar=
ial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial"><span style=3D"font-fam=
ily:arial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);tex=
t-decoration-style:initial;text-decoration-color:initial;float:none;display=
:inline">Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BGP Automated Session Set=
up (BGP-ASS)</span><br style=3D"font-family:arial,sans-serif;font-size:12.8=
px;background-color:rgb(255,255,255);text-decoration-style:initial;text-dec=
oration-color:initial"><span style=3D"font-family:arial,sans-serif;font-siz=
e:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;te=
xt-decoration-color:initial;float:none;display:inline">Document date:=C2=A0=
<span>=C2=A0</span></span><span class=3D"gmail-aBn" tabindex=3D"0" style=3D=
"border-bottom:1px dashed rgb(204,204,204);font-family:arial,sans-serif;fon=
t-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initi=
al;text-decoration-color:initial"><span class=3D"gmail-aQJ" style=3D"top: 2=
px; z-index: -1;">2018-07-16</span></span><br style=3D"font-family:arial,sa=
ns-serif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration=
-style:initial;text-decoration-color:initial"><span style=3D"font-family:ar=
ial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial;float:none;display:inlin=
e">Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission</span><br=
 style=3D"font-family:arial,sans-serif;font-size:12.8px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial"=
><span style=3D"font-family:arial,sans-serif;font-size:12.8px;background-co=
lor:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:in=
itial;float:none;display:inline">Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 6=
</span><br style=3D"font-family:arial,sans-serif;font-size:12.8px;backgroun=
d-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-colo=
r:initial"><span style=3D"font-family:arial,sans-serif;font-size:12.8px;bac=
kground-color:rgb(255,255,255);text-decoration-style:initial;text-decoratio=
n-color:initial;float:none;display:inline">URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0<span>=C2=A0</span></span><a href=3D"https://www.ietf.org/inte=
rnet-drafts/draft-raszuk-idr-bgp-auto-session-setup-00.txt" rel=3D"noreferr=
er" target=3D"_blank" style=3D"color:rgb(17,85,204);font-family:arial,sans-=
serif;font-size:12.8px;background-color:rgb(255,255,255)">https://www.ietf.=
org/internet-<wbr>drafts/draft-raszuk-idr-bgp-<wbr>auto-session-setup-00.tx=
t</a><br style=3D"font-family:arial,sans-serif;font-size:12.8px;background-=
color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:=
initial"><span style=3D"font-family:arial,sans-serif;font-size:12.8px;backg=
round-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-=
color:initial;float:none;display:inline">Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0</span><a href=3D"https://datatracker.ietf.org/doc/draft-raszuk-idr-=
bgp-auto-session-setup/" rel=3D"noreferrer" target=3D"_blank" style=3D"colo=
r:rgb(17,85,204);font-family:arial,sans-serif;font-size:12.8px;background-c=
olor:rgb(255,255,255)">https://datatracker.ietf.org/<wbr>doc/draft-raszuk-i=
dr-bgp-auto-<wbr>session-setup/</a><br style=3D"font-family:arial,sans-seri=
f;font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:=
initial;text-decoration-color:initial"><span style=3D"font-family:arial,san=
s-serif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration-=
style:initial;text-decoration-color:initial;float:none;display:inline">Html=
ized:=C2=A0 =C2=A0 =C2=A0 =C2=A0</span><a href=3D"https://tools.ietf.org/ht=
ml/draft-raszuk-idr-bgp-auto-session-setup-00" rel=3D"noreferrer" target=3D=
"_blank" style=3D"color:rgb(17,85,204);font-family:arial,sans-serif;font-si=
ze:12.8px;background-color:rgb(255,255,255)">https://tools.ietf.org/html/<w=
br>draft-raszuk-idr-bgp-auto-<wbr>session-setup-00</a><br style=3D"font-fam=
ily:arial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);tex=
t-decoration-style:initial;text-decoration-color:initial"><span style=3D"fo=
nt-family:arial,sans-serif;font-size:12.8px;background-color:rgb(255,255,25=
5);text-decoration-style:initial;text-decoration-color:initial;float:none;d=
isplay:inline">Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0</span><a href=3D"https:=
//datatracker.ietf.org/doc/html/draft-raszuk-idr-bgp-auto-session-setup" re=
l=3D"noreferrer" target=3D"_blank" style=3D"color:rgb(17,85,204);font-famil=
y:arial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255)">http=
s://datatracker.ietf.org/<wbr>doc/html/draft-raszuk-idr-bgp-<wbr>auto-sessi=
on-setup</a><br style=3D"font-family:arial,sans-serif;font-size:12.8px;back=
ground-color:rgb(255,255,255);text-decoration-style:initial;text-decoration=
-color:initial"><br style=3D"font-family:arial,sans-serif;font-size:12.8px;=
background-color:rgb(255,255,255);text-decoration-style:initial;text-decora=
tion-color:initial"><br style=3D"font-family:arial,sans-serif;font-size:12.=
8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-de=
coration-color:initial"><span style=3D"font-family:arial,sans-serif;font-si=
ze:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;t=
ext-decoration-color:initial;float:none;display:inline">Abstract:</span><br=
 style=3D"font-family:arial,sans-serif;font-size:12.8px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial"=
><span style=3D"font-family:arial,sans-serif;font-size:12.8px;background-co=
lor:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:in=
itial;float:none;display:inline">=C2=A0 =C2=A0This document proposes a solu=
tion for BGP deployments in some</span><br style=3D"font-family:arial,sans-=
serif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration-st=
yle:initial;text-decoration-color:initial"><span style=3D"font-family:arial=
,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);text-decorat=
ion-style:initial;text-decoration-color:initial;float:none;display:inline">=
=C2=A0 =C2=A0specific environments to automatically establish BGP sessions =
without</span><br style=3D"font-family:arial,sans-serif;font-size:12.8px;ba=
ckground-color:rgb(255,255,255);text-decoration-style:initial;text-decorati=
on-color:initial"><span style=3D"font-family:arial,sans-serif;font-size:12.=
8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-de=
coration-color:initial;float:none;display:inline">=C2=A0 =C2=A0need for man=
ual peer configuration.</span>=C2=A0</div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">Kind regards,</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
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To: Nikos Triantafillis <ntriantafillis@gmail.com>, Robert Raszuk <robert@raszuk.net>
Cc: Keyur Patel <keyur@arrcus.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Nikos> a much simpler one to address than asking someone to run yet 
another protocol if the functionality could be provided by enhancing the 
existing one they run.

The proposal is to define a brand new message type that is carried in 
UDP (as a multicast datagram!), rather than being carried on a BGP 
session.Â Â  It's hard to see why that is considered to be "enhancing BGP" 
rather than being "yet another protocol".Â Â  Taking a new protocol and 
calling it"BGP" does not necessarily result in an opex savings.Â  
Auto-discovery protocols need to be evaluated on the basis of 
functionality, cost, security, unintended side-effects, etc., not on the 
basis of what name they are given.

Robert> Last it is often the case today - when running no overlay - to 
advertise dynamically VMs or LXCs addresses to TORs via routing protocol 
- say BGP. What happens when now the LXCs or VMs will start sending such 
BGP Hellos directly to TORs ? Do you envision that this proposal will 
automatically establish BGP sessions with those tenant entities if they 
happen to be on the same subnet then compute node itself ?

Nikos> Do you need to enable such functionality on the VMs or LXCs?

One certainly has to deal with the possibility that a Hello will come in 
on an interface that is "DC-facing" rather than "network-facing".

Presumably one wouldn't intentionally enable such functionality on an 
arbitrary tenant VM.Â  Not intentionally.Â  Also, is it really 
inconceivable that a malicious tenant may find a way to cause the Hellos 
to be generated even if the functionality has not been enabled?

Something that all the auto-discovery proposals need to make clear is 
how much provisioning has to be done before the auto-discovery protocol 
starts up.Â  Perhaps the intention is that it is known by provisioning 
that certain interfaces are allowed to lead to EBGP neighbors,Â  and 
certain interfaces are not?




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    <font color="#990000">Nikos&gt; a much simpler one to address than
      asking someone to run yet another protocol if the functionality
      could be provided by enhancing the existing one they run. </font><br>
    <br>
    The proposal is to define a brand new message type that is carried
    in UDP (as a multicast datagram!), rather than being carried on a
    BGP session.Â Â  It's hard to see why that is considered to be
    "enhancing BGP" rather than being "yet another protocol".Â Â  Taking a
    new protocol and calling it"BGP" does not necessarily result in an
    opex savings.Â  Auto-discovery protocols need to be evaluated on the
    basis of functionality, cost, security, unintended side-effects,
    etc., not on the basis of what name they are given.<br>
    <br>
    <div style="font-family:arial,helvetica,sans-serif;font-size:small"><font
        color="#000099">Robert&gt; Last it is often the case today -
        when running no overlay - to advertise dynamically VMs or LXCs
        addresses to TORs via routing protocol - say BGP. What happens
        when now the LXCs or VMs will start sending such BGP Hellos
        directly to TORs ? Do you envision that this proposal will
        automatically establish BGP sessions with those tenant entities
        if they happen to be on the same subnet then compute node itself
        ?Â </font></div>
    <div><br>
    </div>
    <font color="#990000">Nikos&gt; Do you need to enable such
      functionality on the VMs or LXCs?</font><br>
    <br>
    One certainly has to deal with the possibility that a Hello will
    come in on an interface that is "DC-facing" rather than
    "network-facing".Â  <br>
    <br>
    Presumably one wouldn't intentionally enable such functionality on
    an arbitrary tenant VM.Â  Not intentionally.Â  Also, is it really
    inconceivable that a malicious tenant may find a way to cause the
    Hellos to be generated even if the functionality has not been
    enabled?<br>
    <br>
    Something that all the auto-discovery proposals need to make clear
    is how much provisioning has to be done before the auto-discovery
    protocol starts up.Â  Perhaps the intention is that it is known by
    provisioning that certain interfaces are allowed to lead to EBGP
    neighbors,Â  and certain interfaces are not?<br>
    <br>
    <br>
    <br>
  </body>
</html>

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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Eric :

=20

Could you provide a short summary on your opinion on potential =
auto-discovery protocols based on functionality, cost security, =
unintended side=20

a)      Draft-xu-idr-neighbor-autodiscovery=20

b)      Use of LLDP (draft-acee-idr-lldp-peer-discovery)=20

c)       A multicast of neighbor information=20

=20

I know you=E2=80=99ve mentioned part of this information in other =
messages --- but I think it would be very useful to advance the =
discussion on this draft.=20

=20

Thank you,=20

=20

Sue Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Eric C Rosen
Sent: Monday, July 16, 2018 11:51 AM
To: Nikos Triantafillis; Robert Raszuk
Cc: Keyur Patel; draft-xu-idr-neighbor-autodiscovery@ietf.org; Susan =
Hares; idr@ietf.org
Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

Nikos> a much simpler one to address than asking someone to run yet =
another protocol if the functionality could be provided by enhancing the =
existing one they run.=20

The proposal is to define a brand new message type that is carried in =
UDP (as a multicast datagram!), rather than being carried on a BGP =
session.   It's hard to see why that is considered to be "enhancing BGP" =
rather than being "yet another protocol".   Taking a new protocol and =
calling it"BGP" does not necessarily result in an opex savings.  =
Auto-discovery protocols need to be evaluated on the basis of =
functionality, cost, security, unintended side-effects, etc., not on the =
basis of what name they are given.

Robert> Last it is often the case today - when running no overlay - to =
advertise dynamically VMs or LXCs addresses to TORs via routing protocol =
- say BGP. What happens when now the LXCs or VMs will start sending such =
BGP Hellos directly to TORs ? Do you envision that this proposal will =
automatically establish BGP sessions with those tenant entities if they =
happen to be on the same subnet then compute node itself ?=20

=20

Nikos> Do you need to enable such functionality on the VMs or LXCs?

One certainly has to deal with the possibility that a Hello will come in =
on an interface that is "DC-facing" rather than "network-facing". =20

Presumably one wouldn't intentionally enable such functionality on an =
arbitrary tenant VM.  Not intentionally.  Also, is it really =
inconceivable that a malicious tenant may find a way to cause the Hellos =
to be generated even if the functionality has not been enabled?

Something that all the auto-discovery proposals need to make clear is =
how much provisioning has to be done before the auto-discovery protocol =
starts up.  Perhaps the intention is that it is known by provisioning =
that certain interfaces are allowed to lead to EBGP neighbors,  and =
certain interfaces are not?





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</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-US link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Eric :<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Could you provide a short summary on your opinion on potential =
auto-discovery protocols based on functionality, cost security, =
unintended side <o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo1'><![if =
!supportLists]><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><span style=3D'mso-list:Ignore'>a)<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Draft-xu-idr-neighbor-autodiscovery <o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><span style=3D'mso-list:Ignore'>b)<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Use of LLDP (draft-acee-idr-lldp-peer-discovery) =
<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo1'><![if =
!supportLists]><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><span style=3D'mso-list:Ignore'>c)<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>A multicast of neighbor information <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I know you=E2=80=99ve mentioned part of this information in other =
messages --- but I think it would be very useful to advance the =
discussion on this draft. <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you, <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Eric C =
Rosen<br><b>Sent:</b> Monday, July 16, 2018 11:51 AM<br><b>To:</b> Nikos =
Triantafillis; Robert Raszuk<br><b>Cc:</b> Keyur Patel; =
draft-xu-idr-neighbor-autodiscovery@ietf.org; Susan Hares; =
idr@ietf.org<br><b>Subject:</b> Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span style=3D'color:#990000'>Nikos&gt; a =
much simpler one to address than asking someone to run yet another =
protocol if the functionality could be provided by enhancing the =
existing one they run. </span><br><br>The proposal is to define a brand =
new message type that is carried in UDP (as a multicast datagram!), =
rather than being carried on a BGP session.&nbsp;&nbsp; It's hard to see =
why that is considered to be &quot;enhancing BGP&quot; rather than being =
&quot;yet another protocol&quot;.&nbsp;&nbsp; Taking a new protocol and =
calling it&quot;BGP&quot; does not necessarily result in an opex =
savings.&nbsp; Auto-discovery protocols need to be evaluated on the =
basis of functionality, cost, security, unintended side-effects, etc., =
not on the basis of what name they are given.<o:p></o:p></p><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:#000099'>Robert&gt; Last =
it is often the case today - when running no overlay - to advertise =
dynamically VMs or LXCs addresses to TORs via routing protocol - say =
BGP. What happens when now the LXCs or VMs will start sending such BGP =
Hellos directly to TORs ? Do you envision that this proposal will =
automatically establish BGP sessions with those tenant entities if they =
happen to be on the same subnet then compute node itself =
?&nbsp;</span><span =
style=3D'font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span style=3D'color:#990000'>Nikos&gt; =
Do you need to enable such functionality on the VMs or =
LXCs?</span><br><br>One certainly has to deal with the possibility that =
a Hello will come in on an interface that is &quot;DC-facing&quot; =
rather than &quot;network-facing&quot;.&nbsp; <br><br>Presumably one =
wouldn't intentionally enable such functionality on an arbitrary tenant =
VM.&nbsp; Not intentionally.&nbsp; Also, is it really inconceivable that =
a malicious tenant may find a way to cause the Hellos to be generated =
even if the functionality has not been enabled?<br><br>Something that =
all the auto-discovery proposals need to make clear is how much =
provisioning has to be done before the auto-discovery protocol starts =
up.&nbsp; Perhaps the intention is that it is known by provisioning that =
certain interfaces are allowed to lead to EBGP neighbors,&nbsp; and =
certain interfaces are =
not?<br><br><br><o:p></o:p></p></div></body></html>
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To: "'Eric C Rosen'" <erosen@juniper.net>, "'Nikos Triantafillis'" <ntriantafillis@gmail.com>, "'Robert Raszuk'" <robert@raszuk.net>
Cc: "'Keyur Patel'" <keyur@arrcus.com>, <draft-xu-idr-neighbor-autodiscovery@ietf.org>, <idr@ietf.org>
References: <013701d41227$579d2d10$06d78730$@ndzh.com> <6ACB426F-D10D-43E2-BC12-2D41D0CCE88A@arrcus.com> <CA+R4MGeh=+e4FvPfeGzd-4UnxuPiwHHEMEKuieXZOTitVYHm2A@mail.gmail.com> <CA+b+ERmAHwKY8x0jH6Pk9Svu1BQFDxrG2ozQO97VHWV=jXtHqA@mail.gmail.com> <CA+R4MGcoer=tAVCPPYTsXp-DtiO1cxArxJA=iAMsJ_A_LmzrhA@mail.gmail.com> <20401d8c-4591-0507-776f-a154bc968245@juniper.net> <006401d41d30$b3e0b1f0$1ba215d0$@ndzh.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/BVRZckg0G7X4zK3NQ_Rv2BAPFmM>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Eric:

=20

If you get time to send details on this analysis, will you include:=20

=C2=B7         draft-raszuk-idr-bgp-auto-session-setup-00

=20

Robert would appreciate the feedback (and so would I).=20

=20

Thank you, Sue=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Monday, July 16, 2018 2:14 PM
To: 'Eric C Rosen'; 'Nikos Triantafillis'; 'Robert Raszuk'
Cc: 'Keyur Patel'; draft-xu-idr-neighbor-autodiscovery@ietf.org; =
idr@ietf.org
Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

Eric :

=20

Could you provide a short summary on your opinion on potential =
auto-discovery protocols based on functionality, cost security, =
unintended side=20

a)      Draft-xu-idr-neighbor-autodiscovery=20

b)      Use of LLDP (draft-acee-idr-lldp-peer-discovery)=20

c)       A multicast of neighbor information=20

=20

I know you=E2=80=99ve mentioned part of this information in other =
messages --- but I think it would be very useful to advance the =
discussion on this draft.=20

=20

Thank you,=20

=20

Sue Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Eric C Rosen
Sent: Monday, July 16, 2018 11:51 AM
To: Nikos Triantafillis; Robert Raszuk
Cc: Keyur Patel; draft-xu-idr-neighbor-autodiscovery@ietf.org; Susan =
Hares; idr@ietf.org
Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

Nikos> a much simpler one to address than asking someone to run yet =
another protocol if the functionality could be provided by enhancing the =
existing one they run.=20

The proposal is to define a brand new message type that is carried in =
UDP (as a multicast datagram!), rather than being carried on a BGP =
session.   It's hard to see why that is considered to be "enhancing BGP" =
rather than being "yet another protocol".   Taking a new protocol and =
calling it"BGP" does not necessarily result in an opex savings.  =
Auto-discovery protocols need to be evaluated on the basis of =
functionality, cost, security, unintended side-effects, etc., not on the =
basis of what name they are given.

Robert> Last it is often the case today - when running no overlay - to =
advertise dynamically VMs or LXCs addresses to TORs via routing protocol =
- say BGP. What happens when now the LXCs or VMs will start sending such =
BGP Hellos directly to TORs ? Do you envision that this proposal will =
automatically establish BGP sessions with those tenant entities if they =
happen to be on the same subnet then compute node itself ?=20

=20

Nikos> Do you need to enable such functionality on the VMs or LXCs?

One certainly has to deal with the possibility that a Hello will come in =
on an interface that is "DC-facing" rather than "network-facing". =20

Presumably one wouldn't intentionally enable such functionality on an =
arbitrary tenant VM.  Not intentionally.  Also, is it really =
inconceivable that a malicious tenant may find a way to cause the Hellos =
to be generated even if the functionality has not been enabled?

Something that all the auto-discovery proposals need to make clear is =
how much provisioning has to be done before the auto-discovery protocol =
starts up.  Perhaps the intention is that it is known by provisioning =
that certain interfaces are allowed to lead to EBGP neighbors,  and =
certain interfaces are not?




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</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-US link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Eric:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If you get time to send details on this analysis, will you include: =
<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l1 level1 lfo3'><![if =
!supportLists]><span =
style=3D'font-size:11.0pt;font-family:Symbol;color:#1F497D'><span =
style=3D'mso-list:Ignore'>=C2=B7<span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>draft-raszuk-idr-bgp-auto-session-setup-00<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Robert would appreciate the feedback (and so would I). =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you, Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Susan =
Hares<br><b>Sent:</b> Monday, July 16, 2018 2:14 PM<br><b>To:</b> 'Eric =
C Rosen'; 'Nikos Triantafillis'; 'Robert Raszuk'<br><b>Cc:</b> 'Keyur =
Patel'; draft-xu-idr-neighbor-autodiscovery@ietf.org; =
idr@ietf.org<br><b>Subject:</b> Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Eric :<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Could you provide a short summary on your opinion on potential =
auto-discovery protocols based on functionality, cost security, =
unintended side <o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><span style=3D'mso-list:Ignore'>a)<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Draft-xu-idr-neighbor-autodiscovery <o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo2'><![if !supportLists]><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><span style=3D'mso-list:Ignore'>b)<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Use of LLDP (draft-acee-idr-lldp-peer-discovery) =
<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><span style=3D'mso-list:Ignore'>c)<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>A multicast of neighbor information <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I know you=E2=80=99ve mentioned part of this information in other =
messages --- but I think it would be very useful to advance the =
discussion on this draft. <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you, <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Eric C =
Rosen<br><b>Sent:</b> Monday, July 16, 2018 11:51 AM<br><b>To:</b> Nikos =
Triantafillis; Robert Raszuk<br><b>Cc:</b> Keyur Patel; =
draft-xu-idr-neighbor-autodiscovery@ietf.org; Susan Hares; =
idr@ietf.org<br><b>Subject:</b> Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span style=3D'color:#990000'>Nikos&gt; a =
much simpler one to address than asking someone to run yet another =
protocol if the functionality could be provided by enhancing the =
existing one they run. </span><br><br>The proposal is to define a brand =
new message type that is carried in UDP (as a multicast datagram!), =
rather than being carried on a BGP session.&nbsp;&nbsp; It's hard to see =
why that is considered to be &quot;enhancing BGP&quot; rather than being =
&quot;yet another protocol&quot;.&nbsp;&nbsp; Taking a new protocol and =
calling it&quot;BGP&quot; does not necessarily result in an opex =
savings.&nbsp; Auto-discovery protocols need to be evaluated on the =
basis of functionality, cost, security, unintended side-effects, etc., =
not on the basis of what name they are given.<o:p></o:p></p><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:#000099'>Robert&gt; Last =
it is often the case today - when running no overlay - to advertise =
dynamically VMs or LXCs addresses to TORs via routing protocol - say =
BGP. What happens when now the LXCs or VMs will start sending such BGP =
Hellos directly to TORs ? Do you envision that this proposal will =
automatically establish BGP sessions with those tenant entities if they =
happen to be on the same subnet then compute node itself =
?&nbsp;</span><span =
style=3D'font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span style=3D'color:#990000'>Nikos&gt; =
Do you need to enable such functionality on the VMs or =
LXCs?</span><br><br>One certainly has to deal with the possibility that =
a Hello will come in on an interface that is &quot;DC-facing&quot; =
rather than &quot;network-facing&quot;.&nbsp; <br><br>Presumably one =
wouldn't intentionally enable such functionality on an arbitrary tenant =
VM.&nbsp; Not intentionally.&nbsp; Also, is it really inconceivable that =
a malicious tenant may find a way to cause the Hellos to be generated =
even if the functionality has not been enabled?<br><br>Something that =
all the auto-discovery proposals need to make clear is how much =
provisioning has to be done before the auto-discovery protocol starts =
up.&nbsp; Perhaps the intention is that it is known by provisioning that =
certain interfaces are allowed to lead to EBGP neighbors,&nbsp; and =
certain interfaces are not?<br><br><o:p></o:p></p></div></body></html>
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Subject: [Idr] I-D Action: draft-xu-idr-neighbor-autodiscovery-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Routing WG of the IETF.

        Title           : BGP Neighbor Auto-Discovery
        Authors         : Xiaohu Xu
                          Ketan Talaulikar
                          Kunyang Bi
                          Jeff Tantsura
                          Nikos Triantafillis
	Filename        : draft-xu-idr-neighbor-autodiscovery-09.txt
	Pages           : 27
	Date            : 2018-07-16

Abstract:
   BGP is being used as the underlay routing protocol in some large-
   scaled data centers (DCs).  Most popular design followed is to do
   hop-by-hop external BGP (eBGP) session configurations between
   neighboring routers on a per link basis.  The provisioning of BGP
   neighbors in routers across such a DC brings its own operational
   complexity.

   This document introduces a BGP neighbor discovery mechanism that
   greatly simplifies BGP operations in such DC and other networks by
   automatic setup of BGP sessions between neighbor routers using this
   mechanism.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-xu-idr-neighbor-autodiscovery-09
https://datatracker.ietf.org/doc/html/draft-xu-idr-neighbor-autodiscovery-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-xu-idr-neighbor-autodiscovery-09


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

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


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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Susan Hares <shares@ndzh.com>, "'Eric C Rosen'" <erosen@juniper.net>, "'Nikos Triantafillis'" <ntriantafillis@gmail.com>, "'Robert Raszuk'" <robert@raszuk.net>
CC: "'Keyur Patel'" <keyur@arrcus.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Mon, 16 Jul 2018 19:28:02 +0000
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Mon, 16 Jul 2018 20:18:55 +0000
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From nobody Mon Jul 16 13:41:09 2018
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From: Jeffrey Haas <jhaas@pfrc.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Jakob,

On Mon, Jul 16, 2018 at 08:04:26PM +0000, Jakob Heitz (jheitz) wrote:
> I'm not sure that it matters if the transport for the messages is UDP or LLDP.
> AFAIK, LLDP can only go one hop. That might be a good thing.

LLDP, however, doesn't transit switches.  This restricts its use case
considerably.  (Somewhat intentionally.)

As I mentioned in my own comments earlier, auto-discovery is worth working
on.  Exactly which transport(s) we choose will be much of the interesting
discussion.

> The hello messages are not necessary for session teardown. Keepalives already do that.

I think the general concern is what we do with the BGP FSM if we start doing
LDP-like things.  LDP has some ugly FSM implications we likely wouldn't want
in BGP.

> Both draft-xu-idr-neighbor-autodiscovery and draft-acee-idr-lldp-peer-discovery contain valuable TLVs. I would like to adopt a draft that contains TLVs from both drafts.
> 
> In addition, I would like a TLV that contains a network name. Every speaker in the same network will have the same network name. This can be used to contain the discovery process within a named network if multiple networks are connected together.

I'm not sure I follow your use case, but prior discussion about names over
BGP capabilities that help with the link local case definitely fit into this
rough space.

-- Jeff


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From: Derek Yeung <derek@arrcus.com>
To: Abhay Roy <abhay@arrcus.com>, Gunter Van De Velde <guntervandeveldecc=40icloud.com@dmarc.ietf.org>
CC: "idr@ietf.org" <idr@ietf.org>, Keyur Patel <keyur@arrcus.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "lsvr@ietf.com" <lsvr@ietf.com>, "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>, Susan Hares <shares@ndzh.com>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/6VBg8bYOgnvPCyb_T21HnOoQzeY>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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--0000000000009666a705712ca54c
Content-Type: text/plain; charset="UTF-8"

Xiaohu,

First I did not deny anything.

I still believe that DCs should use following reachability protocols in the
order of preference:

1. Link state IGP (vast majority of DCs can use it *as is*)
2. MSDCs link state with flooding reduction
3. EBGP with central configuration

I can see a value of automatic bring-up for SD-WAN CPE - you buy a box,
place it anywhere in the world and it joins the local provider's underlay
and then VPNs you are authorized to join all with just a login name.

But in DC things do not work that way. In order to install a box you need
to open a ticket with exact connectivity map as otherwise it will not get
mounted. So you do know exactly where it is placed and who to peer with.
Configuration will be necessary anyway.

Note that validation if connectivity is done correctly according to your
map is very important, but clearly does not belong to BGP.

I wrote my proposal to a little bit enhance the #3 above mainly due to:

a) points made by some folks that IETF should not mandate or limit
operators on how to build his network

b) to limit damage which other similar proposals will result with.


> please list them explicitly and then we can consider how to address your
concerns.

Sure:

A) Permanently installing routes in RIB & FIB carried in BGP Hellos TLVs
which are UDP based is something never heard of. Clearly you are up to
great precedence here. There is no mention in the current draft when such
routes are removed.

B) All TLVs which are defined outside of need to bring up BGP session are
dangerous as they glue current BGP with say new innovation (ex: LSVR) Once
done here you can no longer separate the two.

C) Creation of new message instead of using existing BGP message requires
more changes then necessary. It also allows for extensible framework which
while normally is a feature here has a clear potential to be rather a bad
thing.

D) Sending BGP Hellos periodically - after session is up does not seems to
bring any value especially for p2p links. For LANs on the other hand (if
such requirement is in place) there are much better solutions other then
periodic BGP Hellos.

E) I see no reason to suggest in any form use of port 179 to such UDP
multicast messages


Thx,
R.

--0000000000009666a705712ca54c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Xiaohu,</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">First I did not deny anything.=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">I still believe that DCs should use f=
ollowing reachability protocols in the order of preference:=C2=A0</div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">1. Link state IGP (vast majorit=
y of DCs can use it *as is*)</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">2. MSDCs link state wi=
th flooding reduction</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">3. EBGP with central configur=
ation</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">I can see a val=
ue of automatic bring-up for SD-WAN CPE - you buy a box, place it anywhere =
in the world and it joins the local provider&#39;s underlay and then VPNs y=
ou are authorized to join all with just a login name.=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">But in DC things do not work that way=
. In order to install a box you need to open a ticket with exact connectivi=
ty map as otherwise it will not get mounted. So you do know exactly where i=
t is placed and who to peer with. Configuration will be necessary anyway.=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Note that valid=
ation if connectivity is done correctly according to your map is very impor=
tant, but clearly does not belong to BGP.=C2=A0</div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">I wrote my proposal to a little bit enhance the #=
3 above mainly due to:=C2=A0</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">a) points made by some folks that IETF should not mandate or limit=
 operators on how to build his network</div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small">b) to limit damage which other similar proposals will resu=
lt with.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">

<span style=3D"color:rgb(0,0,0);font-family:Tahoma,Arial,STHeiti,SimSun;fon=
t-size:14px;background-color:rgb(255,255,255);text-decoration-style:initial=
;text-decoration-color:initial;float:none;display:inline">&gt; please list =
them explicitly and then we can consider how to address your concerns.</spa=
n>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Sure:=C2=A0</di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small">A) Permanently installing=
 routes in RIB &amp; FIB carried in BGP Hellos TLVs which are UDP based is =
something never heard of. Clearly you are up to great precedence here. Ther=
e is no mention in the current draft when such routes are removed.=C2=A0</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">B) All TLVs which are de=
fined outside of need to bring up BGP session are dangerous as they glue cu=
rrent BGP with say new innovation (ex: LSVR) Once done here you can no long=
er separate the two.=C2=A0</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all">C) Creation of new message instead of using existing BGP message requi=
res more changes then necessary. It also allows for extensible framework wh=
ich while normally is a feature here has a clear potential to be rather a b=
ad thing.=C2=A0=C2=A0</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail=
_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
D) Sending BGP Hellos periodically - after session is up does not seems to =
bring any value especially for p2p links. For LANs on the other hand (if su=
ch requirement is in place) there are much better solutions other then peri=
odic BGP Hellos.=C2=A0<br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all">E) I see no reason to suggest in any form use of port 179 to such UDP =
multicast messages</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">Thx,<br>R.</div></div>

--0000000000009666a705712ca54c--


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------=ALIBOUNDARY_83262_47e32940_5b4db527_290578--


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From: Robert Raszuk <robert@raszuk.net>
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Xiaohu,


A) Permanently installing routes in RIB & FIB carried in BGP Hellos TLVs
> which are UDP based is something never heard of. Clearly you are up to
> great precedence here. There is no mention in the current draft when such
> routes are removed.
>
> [Xiaohu] It said in the draft that "
>
>    If the timer
>    expires without receipt of a matching Hello from the peer, BGP
>    concludes that the peer no longer wishes to keep BGP session for that
>    link or that the peer has failed.  The BGP peer then deletes the
>    Hello adjacency.  The route towards the BGP neighbor's loopback
>    address that had been dynamically created due to that BGP Hello
>    adjacency SHOULD be deleted accordingly. "
>
>


=E2=80=8BYou did not responded to the question at all as I never asked abou=
t BGP
session above. There is no BGP session between loopbacks till you put
routes in RIB and FIB as loopback is still unreachable. =E2=80=8BIn your dr=
aft you
are putting the routes from TLVs carried in UDP and not only how to reach
loopback but also all the atomic connected addresses on how to ECMP towards
loopback. Observe that in my proposal I am not doing it.

IMO that is not acceptable.

Now since you quoted the above note that even some of your own co-authors
declared this is going away and session will not be brought down upon
missing hellos. It is sufficient to keep any BGP session up based on the
keepalives, bfd or manual shut.

In fact just few lines below you agree that periodic hellos may not be
necessary when the session is up.

Very confusing picture ...

[Xiaohu] Could you please explicitly point out which TLVs are not needed?
>
>

=E2=80=8BAll of them. =E2=80=8B

C) Creation of new message instead of using existing BGP message requires
> more changes then necessary. It also allows for extensible framework whic=
h
> while normally is a feature here has a clear potential to be rather a bad
> thing.
>
> [Xiaohu] Which existing BGP message could be used for this BGP peer
> auto-discovery purpose from your POV?
>
>

=E2=80=8BBGP Open Message. =E2=80=8B





> D) Sending BGP Hellos periodically - after session is up does not seems t=
o
> bring any value especially for p2p links. For LANs on the other hand (if
> such requirement is in place) there are much better solutions other then
> periodic BGP Hellos.
>
> [Xiaohu] Good point. We could consider how to optimize it in the future.
> Do you have any concrete suggestions for such optimization?
>
>

=E2=80=8Bas above ... =E2=80=8B

=E2=80=8BThx,
R.=E2=80=8B

--00000000000016592b057131a937
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Xiaohu,</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_extra"><div class=3D"gm=
ail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_25002245227268273=
58__aliyun_email_body_block"><div style=3D"line-height:1.7;font-family:Taho=
ma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><blockquote style=
=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma,Arial,ST=
Heiti,SimSun;font-size:14.0px;color:#000000"><span class=3D""><div style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">A) Permanently ins=
talling routes in RIB &amp; FIB carried in BGP Hellos TLVs which are UDP ba=
sed is something never heard of. Clearly you are up to great precedence her=
e. There is no mention in the current draft when such routes are removed.=
=C2=A0<br></div><div style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div></span><div style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">[Xiaohu] It said in the draft that &quot;<pre class=
=3D"m_2500224522726827358newpage" style=3D"font-size:13.3px;margin-top:.0px=
;margin-bottom:.0px;break-before:page;color:#000000;font-style:normal;font-=
variant-caps:normal;font-weight:normal;text-align:start;text-indent:.0px;te=
xt-transform:none">   If the timer
   expires without receipt of a matching Hello from the peer, BGP
   concludes that the peer no longer wishes to keep BGP session for that
   link or that the peer has failed.  The BGP peer then deletes the
   Hello adjacency.  The route towards the BGP neighbor&#39;s loopback
   address that had been dynamically created due to that BGP Hello
   adjacency SHOULD be deleted accordingly. &quot;</pre></div></blockquote>=
</div></div></blockquote><div><br></div><div><br></div><div><br></div><div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">=E2=80=8BYou did not responded to the question at all as=
 I never asked about BGP session above. There is no BGP session between loo=
pbacks till you put routes in RIB and FIB as loopback is still unreachable.=
 =E2=80=8BIn your draft you are putting the routes from TLVs carried in UDP=
 and not only how to reach loopback but also all the atomic connected addre=
sses on how to ECMP towards loopback. Observe that in my proposal I am not =
doing it.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">IMO th=
at is not acceptable.=C2=A0</div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">Now since you quoted the above note that even some of your own co-aut=
hors declared this is going away and session will not be brought down upon =
missing hellos. It is sufficient to keep any BGP session up based on the ke=
epalives, bfd or manual shut.=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">In fact just few lines below you agree that periodic hellos m=
ay not be necessary when the session is up.=C2=A0</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">Very confusing picture ...=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_25=
00224522726827358__aliyun_email_body_block"><div style=3D"line-height:1.7;f=
ont-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><blo=
ckquote style=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Ta=
homa,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><span class=3D"">=
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">[Xiao=
hu] Could you please explicitly point out=C2=A0which=C2=A0TLVs are not need=
ed?<br></div></span></blockquote></div></div></blockquote><div><br></div><d=
iv><br></div><div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small">=E2=80=8BAll of them. =E2=80=8B</div><=
br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;borde=
r-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_2500224522726827358=
__aliyun_email_body_block"><div style=3D"line-height:1.7;font-family:Tahoma=
,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><blockquote style=3D"=
margin-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma,Arial,STHeit=
i,SimSun;font-size:14.0px;color:#000000"><span class=3D""><div style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">C) Creation of new mes=
sage instead of using existing BGP message requires more changes then neces=
sary. It also allows for extensible framework which while normally is a fea=
ture here has a clear potential to be rather a bad thing.=C2=A0=C2=A0<br></=
div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div></span><div style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">[Xiaohu] Which existing BGP message could be used for this BGP p=
eer auto-discovery=C2=A0purpose from your POV?=C2=A0</div></blockquote></di=
v></div></blockquote><div><br></div><div><br></div><div><div class=3D"gmail=
_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
=E2=80=8BBGP Open Message. =E2=80=8B</div><br></div><div><br></div><div><br=
></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_2500=
224522726827358__aliyun_email_body_block"><div style=3D"line-height:1.7;fon=
t-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><block=
quote style=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Taho=
ma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><span class=3D""><d=
iv style=3D"font-family:arial,helvetica,sans-serif;font-size:small">D) Send=
ing BGP Hellos periodically - after session is up does not seems to bring a=
ny value especially for p2p links. For LANs on the other hand (if such requ=
irement is in place) there are much better solutions other then periodic BG=
P Hellos.=C2=A0<br></div><div style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div></span><div style=3D"font-family:arial,helvet=
ica,sans-serif;font-size:small">[Xiaohu] Good point. We could consider how =
to optimize it in the future. Do you have any concrete suggestions for such=
 optimization?</div></blockquote></div></div></blockquote><div><br></div><d=
iv><br></div><div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small">=E2=80=8Bas above ... =E2=80=8B</div><=
br></div><div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">=E2=80=8BThx,<br>R.=E2=80=8B</div><br></di=
v></div></div></div>

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From: "UTTARO, JAMES" <ju1738@att.com>
To: "Ketan Talaulikar (ketant)" <ketant=40cisco.com@dmarc.ietf.org>, "Susan Hares" <shares@ndzh.com>, "'Eric C Rosen'" <erosen@juniper.net>, "'Nikos Triantafillis'" <ntriantafillis@gmail.com>, "'Robert Raszuk'" <robert@raszuk.net>
CC: "'Keyur Patel'" <keyur@arrcus.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: "UTTARO, JAMES" <ju1738@att.com>, "Ketan Talaulikar (ketant)" <ketant=40cisco.com@dmarc.ietf.org>, Susan Hares <shares@ndzh.com>, "'Eric C Rosen'" <erosen@juniper.net>, "'Nikos Triantafillis'" <ntriantafillis@gmail.com>, "'Robert Raszuk'" <robert@raszuk.net>
CC: "'Keyur Patel'" <keyur@arrcus.com>, "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
Thread-Index: AdQSJcQmPylai0FFTx6TtuTV7fzVrQIDBM+AADNtUwAAAXxugAABZG+AAI7sdgAABPZ5AAAASEWAAAhjFyAAIBAHgAAJFLXg
Date: Tue, 17 Jul 2018 14:29:12 +0000
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References: <013701d41227$579d2d10$06d78730$@ndzh.com> <6ACB426F-D10D-43E2-BC12-2D41D0CCE88A@arrcus.com> <CA+R4MGeh=+e4FvPfeGzd-4UnxuPiwHHEMEKuieXZOTitVYHm2A@mail.gmail.com> <CA+b+ERmAHwKY8x0jH6Pk9Svu1BQFDxrG2ozQO97VHWV=jXtHqA@mail.gmail.com> <CA+R4MGcoer=tAVCPPYTsXp-DtiO1cxArxJA=iAMsJ_A_LmzrhA@mail.gmail.com> <20401d8c-4591-0507-776f-a154bc968245@juniper.net> <006401d41d30$b3e0b1f0$1ba215d0$@ndzh.com> <009a01d41d31$d4c96b40$7e5c41c0$@ndzh.com> <b6d6905f2b904a21bfb8e59d8e760199@XCH-ALN-008.cisco.com> <B17A6910EEDD1F45980687268941550F36779D63@MISOUT7MSGUSRCD.ITServices.sbc.com> <66faeea6-b4c4-4ef6-84a7-3bdc4737a6eb.xiaohu.xxh@alibaba-inc.com>
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Cc: Idr <idr-bounces@ietf.org>,  "Ketan Talaulikar (ketant)" <ketant=40cisco.com@dmarc.ietf.org>, Susan Hares <shares@ndzh.com>, Eric C Rosen <erosen@juniper.net>, Nikos Triantafillis <ntriantafillis@gmail.com>,  Keyur Patel <keyur@arrcus.com>,  "draft-xu-idr-neighbor-autodiscovery@ietf.org" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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--0000000000002b8128057133a1ee
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>  However, it's not good to introduce static routes to remote loopback
addresses from the automation perspective

It is actually very good if you know how to do it correctly. I think Dino
was asking this question at the LSR WG mic yesterday. And someone
responded: "But the links break" oh .... hint: BFD works fine with static
routes for a long time !

Cheers,
R.


On Tue, Jul 17, 2018 at 4:56 PM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=
=85=88) <xiaohu.xxh@alibaba-inc.com> wrote:

> Hi Jim=EF=BC=8C
>
> For small or even medium-sized DC fabrics, script and even CLI is
> sufficient. For large-scale DC fabric, automation and simplicity is alway=
s
> needed. For the use of BGP as IGP in MSDC, it's better to borrow the
> automation of IGP into IGP so as to simplify the configuration.
> Furthermore, it's desirable to establish BGP sessions over loopback
> addresses when there are multiple links among a give peer of switches.
> However, it's not good to introduce static routes to remote loopback
> addresses from the automation perspective, also not good to introduce
> another complex routing protocol such as ISIS or OSPF just for advertisin=
g
> the loopback addresses.
>
> Best regards,
> Xiaohu
>
>
>
>
>
> =E6=9D=A5=E8=87=AA=E9=92=89=E9=92=89=E4=B8=93=E5=B1=9E=E5=95=86=E5=8A=A1=
=E9=82=AE=E7=AE=B1 <http://(null)>
>
> ------------------------------------------------------------------
> =E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9AUTTARO, JAMES<ju1738@att.com>
> =E6=97=A5 =E6=9C=9F=EF=BC=9A2018=E5=B9=B407=E6=9C=8817=E6=97=A5 21:39:47
> =E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9AKetan Talaulikar (ketant)<ketant=3D40=
cisco.com@dmarc.ietf.org>; Susan
> Hares<shares@ndzh.com>; 'Eric C Rosen'<erosen@juniper.net>; 'Nikos
> Triantafillis'<ntriantafillis@gmail.com>; 'Robert Raszuk'<
> robert@raszuk.net>
> =E6=8A=84 =E9=80=81=EF=BC=9A'Keyur Patel'<keyur@arrcus.com>; draft-xu-idr=
-neighbor-
> autodiscovery@ietf.org<draft-xu-idr-neighbor-autodiscovery@ietf.org>;
> idr@ietf.org<idr@ietf.org>
> =E4=B8=BB =E9=A2=98=EF=BC=9ARe: [Idr] WG adoption call for draft-xu-idr-n=
eighbor-autodiscovery
>
>
> *The main purpose of this draft is to:*
>
>
>
> *a)      **Simplify the MACD in terms of adding Leafs/Spines into a DC
> fabric*
>
> *b)      **Reduce the amount of =E2=80=9Chuman touch=E2=80=9D needed for =
the care and
> feeding of the above?*
>
>
>
> *Is there more to the ask here? *
>
>
>
> *Why is scripting not sufficient to meet this ask? IOW what is unique her=
e
> the IP Addresses, number of interface, ASN List etc=E2=80=A6*
>
>
>
> *I would like to better understand the trade-off between the added
> complexity of modifying BGP in the manner proposed and the simplification=
..*
>
>
>
> *It would be useful to provide more information as to the driver(s) for
> this draft=E2=80=A6*
>
>
>
> *Thanks,*
>
> *                Jim Uttaro*
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Ketan Talaulikar
> (ketant)
> *Sent:* Monday, July 16, 2018 3:28 PM
> *To:* Susan Hares <shares@ndzh.com>; 'Eric C Rosen' <erosen@juniper.net>;
> 'Nikos Triantafillis' <ntriantafillis@gmail.com>; 'Robert Raszuk' <
> robert@raszuk.net>
> *Cc:* 'Keyur Patel' <keyur@arrcus.com>; draft-xu-idr-neighbor-
> autodiscovery@ietf.org; idr@ietf.org
> *Subject:* Re: [Idr] WG adoption call for draft-xu-idr-neighbor-
> autodiscovery
>
>
>
> Hello Eric/All,
>
>
>
> We have updated the document with more details based on the feedback and
> comments received from the WG. I hope this better describes the proposal
> and provides clarity on its interactions with the BGP protocol operations=
.
>
>
>
> https://tools.ietf.org/html/draft-xu-idr-neighbor-autodiscovery-09
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_ht=
ml_draft-2Dxu-2Didr-2Dneighbor-2Dautodiscovery-2D09&d=3DDwMGaQ&c=3DLFYZ-o9_=
HUMeMTSQicvjIg&r=3Ds7ZzB4JbPv3nYuoSx5Gy8Q&m=3DFT-lCfjgXir4WhnyJwGTkogTDuXBv=
H0HydO7P6BNBHo&s=3D8EG10mMq-fhv5rqYctp5jTkVoGvvKq3joBMF4otSw9k&e=3D>
>
>
>
> Would request to please review this version and share your inputs/comment=
s.
>
>
>
> Thanks,
>
> Ketan
>
>
>
> *From:* Idr <idr-bounces@ietf.org> *On Behalf Of *Susan Hares
> *Sent:* 16 July 2018 14:22
> *To:* 'Eric C Rosen' <erosen@juniper.net>; 'Nikos Triantafillis' <
> ntriantafillis@gmail.com>; 'Robert Raszuk' <robert@raszuk.net>
> *Cc:* 'Keyur Patel' <keyur@arrcus.com>; draft-xu-idr-neighbor-
> autodiscovery@ietf.org; idr@ietf.org
> *Subject:* Re: [Idr] WG adoption call for draft-xu-idr-neighbor-
> autodiscovery
>
>
>
> Eric:
>
>
>
> If you get time to send details on this analysis, will you include:
>
> =C2=B7         draft-raszuk-idr-bgp-auto-session-setup-00
>
>
>
> Robert would appreciate the feedback (and so would I).
>
>
>
> Thank you, Sue
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Susan Hares
> *Sent:* Monday, July 16, 2018 2:14 PM
> *To:* 'Eric C Rosen'; 'Nikos Triantafillis'; 'Robert Raszuk'
> *Cc:* 'Keyur Patel'; draft-xu-idr-neighbor-autodiscovery@ietf.org;
> idr@ietf.org
> *Subject:* Re: [Idr] WG adoption call for draft-xu-idr-neighbor-
> autodiscovery
>
>
>
> Eric :
>
>
>
> Could you provide a short summary on your opinion on potential
> auto-discovery protocols based on functionality, cost security, unintende=
d
> side
>
> a)      Draft-xu-idr-neighbor-autodiscovery
>
> b)      Use of LLDP (draft-acee-idr-lldp-peer-discovery)
>
> c)       A multicast of neighbor information
>
>
>
> I know you=E2=80=99ve mentioned part of this information in other message=
s --- but
> I think it would be very useful to advance the discussion on this draft.
>
>
>
> Thank you,
>
>
>
> Sue Hares
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Eric C Rosen
> *Sent:* Monday, July 16, 2018 11:51 AM
> *To:* Nikos Triantafillis; Robert Raszuk
> *Cc:* Keyur Patel; draft-xu-idr-neighbor-autodiscovery@ietf.org; Susan
> Hares; idr@ietf.org
> *Subject:* Re: [Idr] WG adoption call for draft-xu-idr-neighbor-
> autodiscovery
>
>
>
> Nikos> a much simpler one to address than asking someone to run yet
> another protocol if the functionality could be provided by enhancing the
> existing one they run.
>
> The proposal is to define a brand new message type that is carried in UDP
> (as a multicast datagram!), rather than being carried on a BGP session.
> It's hard to see why that is considered to be "enhancing BGP" rather than
> being "yet another protocol".   Taking a new protocol and calling it"BGP"
> does not necessarily result in an opex savings.  Auto-discovery protocols
> need to be evaluated on the basis of functionality, cost, security,
> unintended side-effects, etc., not on the basis of what name they are giv=
en.
>
> Robert> Last it is often the case today - when running no overlay - to
> advertise dynamically VMs or LXCs addresses to TORs via routing protocol =
-
> say BGP. What happens when now the LXCs or VMs will start sending such BG=
P
> Hellos directly to TORs ? Do you envision that this proposal will
> automatically establish BGP sessions with those tenant entities if they
> happen to be on the same subnet then compute node itself ?
>
>
>
> Nikos> Do you need to enable such functionality on the VMs or LXCs?
>
> One certainly has to deal with the possibility that a Hello will come in
> on an interface that is "DC-facing" rather than "network-facing".
>
> Presumably one wouldn't intentionally enable such functionality on an
> arbitrary tenant VM.  Not intentionally.  Also, is it really inconceivabl=
e
> that a malicious tenant may find a way to cause the Hellos to be generate=
d
> even if the functionality has not been enabled?
>
> Something that all the auto-discovery proposals need to make clear is how
> much provisioning has to be done before the auto-discovery protocol start=
s
> up.  Perhaps the intention is that it is known by provisioning that certa=
in
> interfaces are allowed to lead to EBGP neighbors,  and certain interfaces
> are not?
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><span style=3D"color:rgb(80,0,80);font-=
family:arial,sans-serif;font-size:12.8px;background-color:rgb(255,255,255);=
text-decoration-style:initial;text-decoration-color:initial;float:none;disp=
lay:inline"><span><br></span></span></div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small">

<span style=3D"color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12=
.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-d=
ecoration-color:initial;float:none;display:inline"><span>&gt;=C2=A0=C2=A0</=
span>However, it&#39;s not good to introduce static routes to remote loopba=
ck addresses from the automation perspective</span>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">It is actually =
very good if you know how to do it correctly. I think Dino was asking this =
question at the LSR WG mic yesterday. And someone responded: &quot;But the =
links break&quot; oh .... hint: BFD works fine with static routes for a lon=
g time !=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Cheers,=
<br>R.</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div></div><div class=3D"gmail_extra"><=
br><div class=3D"gmail_quote">On Tue, Jul 17, 2018 at 4:56 PM, =E5=BE=90=E5=
=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <span dir=3D"ltr">&lt;<a href=3D"mailto=
:xiaohu.xxh@alibaba-inc.com" target=3D"_blank">xiaohu.xxh@alibaba-inc.com</=
a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=3D"">Hi =
Jim=EF=BC=8C<br><br>For small or even medium-sized DC fabrics, script and e=
ven CLI is sufficient. For large-scale DC fabric, automation and simplicity=
 is always needed. For the use of BGP as IGP in MSDC, it&#39;s better to bo=
rrow the automation of IGP into IGP so as to simplify the configuration. Fu=
rthermore, it&#39;s desirable to establish BGP sessions over loopback addre=
sses when there are multiple links among a give peer of switches. However, =
it&#39;s not good to introduce static routes to remote loopback addresses f=
rom the automation perspective, also not good to introduce another complex =
routing protocol such as ISIS or OSPF just for advertising the loopback add=
resses.<br><br>Best regards,<br>Xiaohu <br><br><br><br><br><br><div id=3D"m=
_-1701443559898896021bali-sign"><div style=3D"font-family:PingFangSC-Regula=
r;font-size:14px;color:#666"><a style=3D"color:#38adff;text-decoration:none=
" href=3D"http://(null)" target=3D"_blank">=E6=9D=A5=E8=87=AA=E9=92=89=E9=
=92=89=E4=B8=93=E5=B1=9E=E5=95=86=E5=8A=A1=E9=82=AE=E7=AE=B1</a></div></div=
></span><blockquote><span class=3D"">------------------------------<wbr>---=
---------------------------<wbr>------<br>=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=
=9AUTTARO, JAMES&lt;<a href=3D"mailto:ju1738@att.com" target=3D"_blank">ju1=
738@att.com</a>&gt;<br>=E6=97=A5=E3=80=80=E6=9C=9F=EF=BC=9A2018=E5=B9=B407=
=E6=9C=8817=E6=97=A5 21:39:47<br>=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9AKetan =
Talaulikar (ketant)&lt;ketant=3D<a href=3D"mailto:40cisco.com@dmarc.ietf.or=
g" target=3D"_blank">40cisco.com@<wbr>dmarc.ietf.org</a>&gt;; Susan Hares&l=
t;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&=
gt;; &#39;Eric C Rosen&#39;&lt;<a href=3D"mailto:erosen@juniper.net" target=
=3D"_blank">erosen@juniper.net</a>&gt;; &#39;Nikos Triantafillis&#39;&lt;<a=
 href=3D"mailto:ntriantafillis@gmail.com" target=3D"_blank">ntriantafillis@=
<wbr>gmail.com</a>&gt;; &#39;Robert Raszuk&#39;&lt;<a href=3D"mailto:robert=
@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;<br>=E6=8A=84=E3=80=
=80=E9=80=81=EF=BC=9A&#39;Keyur Patel&#39;&lt;<a href=3D"mailto:keyur@arrcu=
s.com" target=3D"_blank">keyur@arrcus.com</a>&gt;; <a href=3D"mailto:draft-=
xu-idr-neighbor-autodiscovery@ietf.org" target=3D"_blank">draft-xu-idr-neig=
hbor-<wbr>autodiscovery@ietf.org</a>&lt;<a href=3D"mailto:draft-xu-idr-neig=
hbor-autodiscovery@ietf.org" target=3D"_blank">draft-<wbr>xu-idr-neighbor-a=
utodiscovery@<wbr>ietf.org</a>&gt;; <a href=3D"mailto:idr@ietf.org" target=
=3D"_blank">idr@ietf.org</a>&lt;<a href=3D"mailto:idr@ietf.org" target=3D"_=
blank">idr@ietf.org</a>&gt;<br></span>=E4=B8=BB=E3=80=80=E9=A2=98=EF=BC=9AR=
e: [Idr] WG adoption call for draft-xu-idr-neighbor-<wbr>autodiscovery<div>=
<div class=3D"h5"><br><br>





<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-1701443559898896021WordSection1">
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">The main purpose of this draft =
is to:<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"m_-1701443559898896021MsoListParagraph"><u></u><b><i><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#445=
46a"><span>a)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span></i></b><u></u><b><i><span style=3D"font-size:11.0pt;f=
ont-family:&quot;Calibri&quot;,sans-serif;color:#44546a">Simplify the MACD =
in terms of adding Leafs/Spines into a DC fabric<u></u><u></u></span></i></=
b></p>
<p class=3D"m_-1701443559898896021MsoListParagraph"><u></u><b><i><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#445=
46a"><span>b)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span></i></b><u></u><b><i><span style=3D"font-size:11.0pt;f=
ont-family:&quot;Calibri&quot;,sans-serif;color:#44546a">Reduce the amount =
of =E2=80=9Chuman touch=E2=80=9D needed for the care and feeding of the abo=
ve?<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">Is there more to the ask here?
<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">Why is scripting not sufficient=
 to meet this ask? IOW what is unique here the IP Addresses, number of inte=
rface, ASN List etc=E2=80=A6<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">I would like to better understa=
nd the trade-off between the added complexity of modifying BGP in the manne=
r proposed and the simplification..<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">It would be useful to provide m=
ore information as to the driver(s) for this draft=E2=80=A6<u></u><u></u></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">Thanks,<u></u><u></u></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Jim Uttaro<u><=
/u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#44546a"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtex=
t"> Idr [mailto:<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">i=
dr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Ketan Talaulikar (ketant)<br>
<b>Sent:</b> Monday, July 16, 2018 3:28 PM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_bl=
ank">shares@ndzh.com</a>&gt;; &#39;Eric C Rosen&#39; &lt;<a href=3D"mailto:=
erosen@juniper.net" target=3D"_blank">erosen@juniper.net</a>&gt;; &#39;Niko=
s Triantafillis&#39; &lt;<a href=3D"mailto:ntriantafillis@gmail.com" target=
=3D"_blank">ntriantafillis@gmail.com</a>&gt;; &#39;Robert Raszuk&#39; &lt;<=
a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>=
&gt;<br>
<b>Cc:</b> &#39;Keyur Patel&#39; &lt;<a href=3D"mailto:keyur@arrcus.com" ta=
rget=3D"_blank">keyur@arrcus.com</a>&gt;; <a href=3D"mailto:draft-xu-idr-ne=
ighbor-autodiscovery@ietf.org" target=3D"_blank">draft-xu-idr-neighbor-<wbr=
>autodiscovery@ietf.org</a>; <a href=3D"mailto:idr@ietf.org" target=3D"_bla=
nk">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-<wbr>a=
utodiscovery<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Hello Eric/All,<u></u>=
<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">We have updated the do=
cument with more details based on the feedback and comments received from t=
he WG. I hope this better describes the proposal
 and provides clarity on its interactions with the BGP protocol operations.=
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><a href=3D"https://url=
defense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dxu-=
2Didr-2Dneighbor-2Dautodiscovery-2D09&amp;d=3DDwMGaQ&amp;c=3DLFYZ-o9_HUMeMT=
SQicvjIg&amp;r=3Ds7ZzB4JbPv3nYuoSx5Gy8Q&amp;m=3DFT-lCfjgXir4WhnyJwGTkogTDuX=
BvH0HydO7P6BNBHo&amp;s=3D8EG10mMq-fhv5rqYctp5jTkVoGvvKq3joBMF4otSw9k&amp;e=
=3D" target=3D"_blank">https://tools.ietf.org/html/<wbr>draft-xu-idr-neighb=
or-<wbr>autodiscovery-09</a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Would request to pleas=
e review this version and share your inputs/comments.<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Thanks,<u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;color:#1f497d">Ketan<u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-IN" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif;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 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtex=
t"> Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-b=
ounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Susan Hares<br>
<b>Sent:</b> 16 July 2018 14:22<br>
<b>To:</b> &#39;Eric C Rosen&#39; &lt;<a href=3D"mailto:erosen@juniper.net"=
 target=3D"_blank">erosen@juniper.net</a>&gt;; &#39;Nikos Triantafillis&#39=
; &lt;<a href=3D"mailto:ntriantafillis@gmail.com" target=3D"_blank">ntriant=
afillis@gmail.com</a>&gt;; &#39;Robert Raszuk&#39; &lt;<a href=3D"mailto:ro=
bert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc:</b> &#39;Keyur Patel&#39; &lt;<a href=3D"mailto:keyur@arrcus.com" ta=
rget=3D"_blank">keyur@arrcus.com</a>&gt;;
<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org" target=3D"_=
blank">draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-<wbr>a=
utodiscovery<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Eric:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">If you get time to send details on th=
is analysis, will you include:
<u></u><u></u></span></p>
<p class=3D"m_-1701443559898896021MsoListParagraph"><u></u><span style=3D"f=
ont-size:11.0pt;font-family:Symbol;color:#1f497d"><span>=C2=B7<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">draft-raszuk-idr-bgp-auto-<wbr>s=
ession-setup-00<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Robert would appreciate the feedback =
(and so would I).
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thank you, Sue
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></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;,sans-serif;color:windowtext">From:</span></b><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:windowtext"=
> Idr [<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">mailto:idr=
-bounces@ietf.org</a>]
<b>On Behalf Of </b>Susan Hares<br>
<b>Sent:</b> Monday, July 16, 2018 2:14 PM<br>
<b>To:</b> &#39;Eric C Rosen&#39;; &#39;Nikos Triantafillis&#39;; &#39;Robe=
rt Raszuk&#39;<br>
<b>Cc:</b> &#39;Keyur Patel&#39;; <a href=3D"mailto:draft-xu-idr-neighbor-a=
utodiscovery@ietf.org" target=3D"_blank">
draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>; <a href=3D"mailto:id=
r@ietf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-<wbr>a=
utodiscovery<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Eric :<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Could you provide a short summary on =
your opinion on potential auto-discovery protocols based on functionality, =
cost security, unintended side
<u></u><u></u></span></p>
<p class=3D"m_-1701443559898896021MsoListParagraph"><u></u><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><=
span>a)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Draft-xu-idr-neighbor-<wbr>autod=
iscovery
<u></u><u></u></span></p>
<p class=3D"m_-1701443559898896021MsoListParagraph"><u></u><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><=
span>b)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Use of LLDP (draft-acee-idr-lldp=
-peer-<wbr>discovery)
<u></u><u></u></span></p>
<p class=3D"m_-1701443559898896021MsoListParagraph"><u></u><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><=
span>c)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">A multicast of neighbor informat=
ion
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I know you=E2=80=99ve mentioned part =
of this information in other messages --- but I think it would be very usef=
ul to advance the discussion on this draft.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thank you,
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Sue Hares
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></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;,sans-serif;color:windowtext">From:</span></b><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:windowtext"=
> Idr [<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">mailto:idr=
-bounces@ietf.org</a>]
<b>On Behalf Of </b>Eric C Rosen<br>
<b>Sent:</b> Monday, July 16, 2018 11:51 AM<br>
<b>To:</b> Nikos Triantafillis; Robert Raszuk<br>
<b>Cc:</b> Keyur Patel; <a href=3D"mailto:draft-xu-idr-neighbor-autodiscove=
ry@ietf.org" target=3D"_blank">
draft-xu-idr-neighbor-<wbr>autodiscovery@ietf.org</a>; Susan Hares; <a href=
=3D"mailto:idr@ietf.org" target=3D"_blank">
idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-<wbr>a=
utodiscovery<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
#990000">Nikos&gt; a much simpler one to address than asking someone to run=
 yet another protocol if the functionality could be provided by enhancing t=
he existing one they run.
</span><br>
<br>
The proposal is to define a brand new message type that is carried in UDP (=
as a multicast datagram!), rather than being carried on a BGP session.=C2=
=A0=C2=A0 It&#39;s hard to see why that is considered to be &quot;enhancing=
 BGP&quot; rather than being &quot;yet another protocol&quot;.=C2=A0=C2=A0 =
Taking
 a new protocol and calling it&quot;BGP&quot; does not necessarily result i=
n an opex savings.=C2=A0 Auto-discovery protocols need to be evaluated on t=
he basis of functionality, cost, security, unintended side-effects, etc., n=
ot on the basis of what name they are given.<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif;color:#000099">Robert&gt; Last it is often the case today - when runnin=
g no overlay - to advertise dynamically VMs or LXCs addresses to TORs via r=
outing protocol - say BGP. What happens when now
 the LXCs or VMs will start sending such BGP Hellos directly to TORs ? Do y=
ou envision that this proposal will automatically establish BGP sessions wi=
th those tenant entities if they happen to be on the same subnet then compu=
te node itself ?=C2=A0</span><span style=3D"font-family:&quot;Arial&quot;,s=
ans-serif"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
#990000">Nikos&gt; Do you need to enable such functionality on the VMs or L=
XCs?</span><br>
<br>
One certainly has to deal with the possibility that a Hello will come in on=
 an interface that is &quot;DC-facing&quot; rather than &quot;network-facin=
g&quot;.=C2=A0
<br>
<br>
Presumably one wouldn&#39;t intentionally enable such functionality on an a=
rbitrary tenant VM.=C2=A0 Not intentionally.=C2=A0 Also, is it really incon=
ceivable that a malicious tenant may find a way to cause the Hellos to be g=
enerated even if the functionality has not been
 enabled?<br>
<br>
Something that all the auto-discovery proposals need to make clear is how m=
uch provisioning has to be done before the auto-discovery protocol starts u=
p.=C2=A0 Perhaps the intention is that it is known by provisioning that cer=
tain interfaces are allowed to lead to
 EBGP neighbors,=C2=A0 and certain interfaces are not?<u></u><u></u></p>
</div>
</div>

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

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>
> By the way, in addition to automate and simplify the use of BGP as IGP in
> MSDC, the BGP peer auto-discovery mechanism as described in this draft ha=
s
> the potential to be applicable to BGP-SR-TE and LSVR as well.
>
> Sorry for touching the LSVR cheese unintentionally:)
>


=E2=80=8BAnd that is precisely the fundamental issue not a feature to be pr=
oud
about here. You do not turn BGP into link state protocol because you like
to apply LSVR or BGP-SR-TE in the DCs.

Its completely upside down.

That's why my draft =E2=80=8B
https://tools.ietf.org/html/draft-raszuk-idr-bgp-auto-session-setup-00 is a
simple and short honesty check. Is this discussion about helping to bring
the BGP sessions up in some env. or it is rather a black box which bringing
BGP discovery is just a label on it and content will explode in no time
when its shipped ?

Thx,
R.

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex">By the way, in addition to au=
tomate and simplify the use of BGP as IGP in MSDC, the BGP peer auto-discov=
ery mechanism as described in this draft has the potential to be applicable=
 to BGP-SR-TE and LSVR as well. <br><br>Sorry for touching the LSVR cheese =
unintentionally:)<br></blockquote><div><br></div><div><br></div><div><div c=
lass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font=
-size:small">=E2=80=8BAnd that is precisely the fundamental issue not a fea=
ture to be proud about here. You do not turn BGP into link state protocol b=
ecause you like to apply LSVR or BGP-SR-TE in the DCs.=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">Its completely upside down.=C2=A0</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">That&#39;s why my draft =
=E2=80=8B<a href=3D"https://tools.ietf.org/html/draft-raszuk-idr-bgp-auto-s=
ession-setup-00">https://tools.ietf.org/html/draft-raszuk-idr-bgp-auto-sess=
ion-setup-00</a> is a simple and short honesty check. Is this discussion ab=
out helping to bring the BGP sessions up in some env. or it is rather a bla=
ck box which bringing BGP discovery is just a label on it and content will =
explode in no time when its shipped ?=C2=A0</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">Thx,<br>R.</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div><br></div><div><br></div><div>=C2=A0</div></div></div>=
</div>

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Quote:

"peer no longer wishes to keep *BGP session*"


On Tue, Jul 17, 2018 at 5:45 PM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=
=85=88) <xiaohu.xxh@alibaba-inc.com> wrote:

> Where did you find that the quoted text talks about BGP sessions?
>
> Xiaohu
>
>
>
>
>
> =E6=9D=A5=E8=87=AA=E9=92=89=E9=92=89=E4=B8=93=E5=B1=9E=E5=95=86=E5=8A=A1=
=E9=82=AE=E7=AE=B1 <http://(null)>
>
> ------------------------------------------------------------------
> =E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9ARobert Raszuk<robert@raszuk.net>
> =E6=97=A5 =E6=9C=9F=EF=BC=9A2018=E5=B9=B407=E6=9C=8817=E6=97=A5 21:09:46
> =E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88)<xiaohu.xxh@alibaba-inc.com>
> =E6=8A=84 =E9=80=81=EF=BC=9AIdr<idr-bounces@ietf.org>; Lizhenbin<lizhenbi=
n@huawei.com>; Susan
> Hares<shares@ndzh.com>; idr@ietf.org<idr@ietf.org>
> =E4=B8=BB =E9=A2=98=EF=BC=9ARe: [Idr] =E7=AD=94=E5=A4=8D: WG adoption cal=
l for draft-xu-idr-neighbor-autodiscovery
>
>
> Xiaohu,
>
>
> A) Permanently installing routes in RIB & FIB carried in BGP Hellos TLVs
>> which are UDP based is something never heard of. Clearly you are up to
>> great precedence here. There is no mention in the current draft when suc=
h
>> routes are removed.
>>
>> [Xiaohu] It said in the draft that "
>>
>>    If the timer
>>    expires without receipt of a matching Hello from the peer, BGP
>>    concludes that the peer no longer wishes to keep BGP session for that
>>    link or that the peer has failed.  The BGP peer then deletes the
>>    Hello adjacency.  The route towards the BGP neighbor's loopback
>>    address that had been dynamically created due to that BGP Hello
>>    adjacency SHOULD be deleted accordingly. "
>>
>>
>
>
> =E2=80=8BYou did not responded to the question at all as I never asked ab=
out BGP
> session above. There is no BGP session between loopbacks till you put
> routes in RIB and FIB as loopback is still unreachable. =E2=80=8BIn your =
draft you
> are putting the routes from TLVs carried in UDP and not only how to reach
> loopback but also all the atomic connected addresses on how to ECMP towar=
ds
> loopback. Observe that in my proposal I am not doing it.
>
> IMO that is not acceptable.
>
> Now since you quoted the above note that even some of your own co-authors
> declared this is going away and session will not be brought down upon
> missing hellos. It is sufficient to keep any BGP session up based on the
> keepalives, bfd or manual shut.
>
> In fact just few lines below you agree that periodic hellos may not be
> necessary when the session is up.
>
> Very confusing picture ...
>
> [Xiaohu] Could you please explicitly point out which TLVs are not needed?
>>
>>
>
> =E2=80=8BAll of them. =E2=80=8B
>
> C) Creation of new message instead of using existing BGP message requires
>> more changes then necessary. It also allows for extensible framework whi=
ch
>> while normally is a feature here has a clear potential to be rather a ba=
d
>> thing.
>>
>> [Xiaohu] Which existing BGP message could be used for this BGP peer
>> auto-discovery purpose from your POV?
>>
>>
>
> =E2=80=8BBGP Open Message. =E2=80=8B
>
>
>
>
>
>> D) Sending BGP Hellos periodically - after session is up does not seems
>> to bring any value especially for p2p links. For LANs on the other hand =
(if
>> such requirement is in place) there are much better solutions other then
>> periodic BGP Hellos.
>>
>> [Xiaohu] Good point. We could consider how to optimize it in the future.
>> Do you have any concrete suggestions for such optimization?
>>
>>
>
> =E2=80=8Bas above ... =E2=80=8B
>
> =E2=80=8BThx,
> R.=E2=80=8B
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Quote:</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>

<pre class=3D"gmail-m_-6144333848277353003m_2500224522726827358newpage" sty=
le=3D"white-space:pre-wrap;color:rgb(0,0,0);background-color:rgb(255,255,25=
5);text-decoration-style:initial;text-decoration-color:initial;font-size:13=
.3px;margin-top:0px;margin-bottom:0px;break-before:page"><span style=3D"fon=
t-weight:normal">&quot;peer no longer wishes to keep </span><b>BGP session<=
/b>&quot; </pre>

</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tu=
e, Jul 17, 2018 at 5:45 PM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=
=3D"_blank">xiaohu.xxh@alibaba-inc.com</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex">Where did you find that the quoted text talks about BGP=
 sessions?<br><br>Xiaohu <br><br><br><br><br><br><div id=3D"m_-614433384827=
7353003bali-sign"><div style=3D"font-family:PingFangSC-Regular;font-size:14=
px;color:#666"><a style=3D"color:#38adff;text-decoration:none" href=3D"http=
://(null)" target=3D"_blank">=E6=9D=A5=E8=87=AA=E9=92=89=E9=92=89=E4=B8=93=
=E5=B1=9E=E5=95=86=E5=8A=A1=E9=82=AE=E7=AE=B1</a></div></div><blockquote>--=
----------------------------<wbr>------------------------------<wbr>------<=
br>=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9ARobert Raszuk&lt;<a href=3D"mailto:r=
obert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;<br>=E6=97=A5=
=E3=80=80=E6=9C=9F=EF=BC=9A2018=E5=B9=B407=E6=9C=8817=E6=97=A5 21:09:46<br>=
=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=
=E5=85=88)&lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com" target=3D"_blan=
k">xiaohu.xxh@<wbr>alibaba-inc.com</a>&gt;<br>=E6=8A=84=E3=80=80=E9=80=81=
=EF=BC=9AIdr&lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">i=
dr-bounces@ietf.org</a>&gt;; Lizhenbin&lt;<a href=3D"mailto:lizhenbin@huawe=
i.com" target=3D"_blank">lizhenbin@huawei.com</a><wbr>&gt;; Susan Hares&lt;=
<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt=
;; <a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&lt;<a=
 href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;<br>=E4=
=B8=BB=E3=80=80=E9=A2=98=EF=BC=9ARe: [Idr] =E7=AD=94=E5=A4=8D: WG adoption =
call for draft-xu-idr-neighbor-<wbr>autodiscovery<div><div class=3D"h5"><br=
><br><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">Xiaohu,</div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small"><br></div><div class=3D"gmail_extra"><div class=
=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-6144333848=
277353003m_2500224522726827358__aliyun_email_body_block"><div style=3D"line=
-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:=
#000000"><blockquote style=3D"margin-right:0;margin-top:0;margin-bottom:0;f=
ont-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"><spa=
n><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">A) =
Permanently installing routes in RIB &amp; FIB carried in BGP Hellos TLVs w=
hich are UDP based is something never heard of. Clearly you are up to great=
 precedence here. There is no mention in the current draft when such routes=
 are removed.=C2=A0<br></div><div style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small"><br></div></span><div style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">[Xiaohu] It said in the draft that &quo=
t;<pre class=3D"m_-6144333848277353003m_2500224522726827358newpage" style=
=3D"font-size:13.3px;margin-top:.0px;margin-bottom:.0px;break-before:page;c=
olor:#000000;font-style:normal;font-variant-caps:normal;font-weight:normal;=
text-align:start;text-indent:.0px;text-transform:none">   If the timer
   expires without receipt of a matching Hello from the peer, BGP
   concludes that the peer no longer wishes to keep BGP session for that
   link or that the peer has failed.  The BGP peer then deletes the
   Hello adjacency.  The route towards the BGP neighbor&#39;s loopback
   address that had been dynamically created due to that BGP Hello
   adjacency SHOULD be deleted accordingly. &quot;</pre></div></blockquote>=
</div></div></blockquote><div><br></div><div><br></div><div><br></div><div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">=E2=80=8BYou did not responded to the question at all as=
 I never asked about BGP session above. There is no BGP session between loo=
pbacks till you put routes in RIB and FIB as loopback is still unreachable.=
 =E2=80=8BIn your draft you are putting the routes from TLVs carried in UDP=
 and not only how to reach loopback but also all the atomic connected addre=
sses on how to ECMP towards loopback. Observe that in my proposal I am not =
doing it.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">IMO th=
at is not acceptable.=C2=A0</div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">Now since you quoted the above note that even some of your own co-aut=
hors declared this is going away and session will not be brought down upon =
missing hellos. It is sufficient to keep any BGP session up based on the ke=
epalives, bfd or manual shut.=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">In fact just few lines below you agree that periodic hellos m=
ay not be necessary when the session is up.=C2=A0</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">Very confusing picture ...=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-6=
144333848277353003m_2500224522726827358__aliyun_email_body_block"><div styl=
e=3D"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0=
px;color:#000000"><blockquote style=3D"margin-right:0;margin-top:0;margin-b=
ottom:0;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000=
000"><span><div style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">[Xiaohu] Could you please explicitly point out=C2=A0which=C2=A0TLVs a=
re not needed?<br></div></span></blockquote></div></div></blockquote><div><=
br></div><div><br></div><div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small">=E2=80=8BAll of them. =E2=
=80=8B</div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-61443=
33848277353003m_2500224522726827358__aliyun_email_body_block"><div style=3D=
"line-height:1.7;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;c=
olor:#000000"><blockquote style=3D"margin-right:0;margin-top:0;margin-botto=
m:0;font-family:Tahoma,Arial,STHeiti,SimSun;font-size:14.0px;color:#000000"=
><span><div style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">C) Creation of new message instead of using existing BGP message requires=
 more changes then necessary. It also allows for extensible framework which=
 while normally is a feature here has a clear potential to be rather a bad =
thing.=C2=A0=C2=A0<br></div><div style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div></span><div style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">[Xiaohu] Which existing BGP message coul=
d be used for this BGP peer auto-discovery=C2=A0purpose from your POV?=C2=
=A0</div></blockquote></div></div></blockquote><div><br></div><div><br></di=
v><div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">=E2=80=8BBGP Open Message. =E2=80=8B</div><br></d=
iv><div><br></div><div><br></div><div>=C2=A0</div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex"><div class=3D"m_-6144333848277353003m_2500224522726827358__aliyun_ema=
il_body_block"><div style=3D"line-height:1.7;font-family:Tahoma,Arial,STHei=
ti,SimSun;font-size:14.0px;color:#000000"><blockquote style=3D"margin-right=
:0;margin-top:0;margin-bottom:0;font-family:Tahoma,Arial,STHeiti,SimSun;fon=
t-size:14.0px;color:#000000"><span><div style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">D) Sending BGP Hellos periodically - after se=
ssion is up does not seems to bring any value especially for p2p links. For=
 LANs on the other hand (if such requirement is in place) there are much be=
tter solutions other then periodic BGP Hellos.=C2=A0<br></div><div style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div></span><=
div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">[Xiaoh=
u] Good point. We could consider how to optimize it in the future. Do you h=
ave any concrete suggestions for such optimization?</div></blockquote></div=
></div></blockquote><div><br></div><div><br></div><div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
=E2=80=8Bas above ... =E2=80=8B</div><br></div><div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=
=80=8BThx,<br>R.=E2=80=8B</div><br></div></div></div></div>
<br></div></div></blockquote></blockquote></div><br></div>

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gards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Jie<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>
<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" align=3D"left" style=3D"text-align:left"><b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sa=
ns-serif">=B7=A2=BC=FE=C8=CB<span lang=3D"EN-US">:</span></span></b><span l=
ang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif"> Idr [mailto:idr-bounces@ietf.org]
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif">=B4=FA=B1=ED </span>
</b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=
=C8=ED=D1=C5=BA=DA&quot;,sans-serif">Dongjie (Jimmy)<br>
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif">=B7=A2=CB=CD=CA=B1=BC=E4<span lang=3D"EN-US">:<=
/span></span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family=
:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif"> 2018</span><span style=
=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-=
serif">=C4=EA<span lang=3D"EN-US">7</span>=D4=C2<span lang=3D"EN-US">16</sp=
an>=C8=D5<span lang=3D"EN-US">
 9:55<br>
</span><b>=CA=D5=BC=FE=C8=CB<span lang=3D"EN-US">:</span></b><span lang=3D"=
EN-US"> idr@ietf.org<br>
</span><b>=B3=AD=CB=CD<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> idr-chairs@ietf.org<br>
</span><b>=D6=F7=CC=E2<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> [Idr] </span>=B4=F0=B8=B4<span lang=3D"EN-US">: Draft IDR agenda posted<o=
:p></o:p></span></span></p>
</div>
</div>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><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">A remin=
der to the presenters:<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">Please =
send your presentation slides by Wednesday. 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">Best re=
gards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Jie<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>
<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" align=3D"left" style=3D"text-align:left"><b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sa=
ns-serif">=B7=A2=BC=FE=C8=CB<span lang=3D"EN-US">:</span></span></b><span l=
ang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounces@ietf.org">m=
ailto:idr-bounces@ietf.org</a>]
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif">=B4=FA=B1=ED </span>
</b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=
=C8=ED=D1=C5=BA=DA&quot;,sans-serif">Dongjie (Jimmy)<br>
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif">=B7=A2=CB=CD=CA=B1=BC=E4<span lang=3D"EN-US">:<=
/span></span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family=
:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif"> 2018</span><span style=
=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-=
serif">=C4=EA<span lang=3D"EN-US">7</span>=D4=C2<span lang=3D"EN-US">4</spa=
n>=C8=D5<span lang=3D"EN-US">
 8:17<br>
</span><b>=CA=D5=BC=FE=C8=CB<span lang=3D"EN-US">:</span></b><span lang=3D"=
EN-US"> <a href=3D"mailto:idr@ietf.org">
idr@ietf.org</a><br>
</span><b>=B3=AD=CB=CD<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> <a href=3D"mailto:idr-chairs@ietf.org">
idr-chairs@ietf.org</a><br>
</span><b>=D6=F7=CC=E2<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> [Idr] Draft IDR agenda posted<o:p></o:p></span></span></p>
</div>
</div>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all, <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The draft agenda of IDR session=
 is posted:
<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"><a href=3D"https://datatracker.=
ietf.org/meeting/102/materials/agenda-102-idr-00">https://datatracker.ietf.=
org/meeting/102/materials/agenda-102-idr-00</a><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"MsoPlainText"><span lang=3D"EN-US">Please let us know if you ha=
ve any problem with it.<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">Presenters, <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 prepare to send your sli=
des to me and CC the chairs. The deadline for slides is 24 hours prior to o=
ur first session (Thursday) , though earlier is better.
<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">And please take a look at the c=
hecklist for presenting at IDR:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://trac.tools.i=
etf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%20at%20an%20IDR%20mee=
ting">https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presen=
ting%20at%20an%20IDR%20meeting</a><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">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</div>
</body>
</html>

--_000_76CD132C3ADEF848BD84D028D243C927A70901BENKGEML515MBXchi_--


From nobody Wed Jul 18 08:18:17 2018
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Jeffrey Haas <jhaas@pfrc.org>
CC: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Date: Wed, 18 Jul 2018 15:17:58 +0000
Message-ID: <48f0a40f373247369ce9e86a79954211@XCH-ALN-014.cisco.com>
References: <013701d41227$579d2d10$06d78730$@ndzh.com> <6ACB426F-D10D-43E2-BC12-2D41D0CCE88A@arrcus.com> <CA+R4MGeh=+e4FvPfeGzd-4UnxuPiwHHEMEKuieXZOTitVYHm2A@mail.gmail.com> <CA+b+ERmAHwKY8x0jH6Pk9Svu1BQFDxrG2ozQO97VHWV=jXtHqA@mail.gmail.com> <CA+R4MGcoer=tAVCPPYTsXp-DtiO1cxArxJA=iAMsJ_A_LmzrhA@mail.gmail.com> <20401d8c-4591-0507-776f-a154bc968245@juniper.net> <006401d41d30$b3e0b1f0$1ba215d0$@ndzh.com> <009a01d41d31$d4c96b40$7e5c41c0$@ndzh.com> <cb7386a35266446bb003848f633bacc4@XCH-ALN-014.cisco.com> <20180716203857.GC14105@pfrc.org>
In-Reply-To: <20180716203857.GC14105@pfrc.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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There may be two network operators that want to auto-discover their own net=
works.
All their routers speak BGP.
They may peer with each other, but do not want to auto-discover each other.
They may peer with a protocol other than BGP.
They may peer with BGP, but apply different routing policies.
Whatever the case, they will treat the peering neighbor differently to thei=
r own neighbors.
A TLV to signal a network name can be used to distinguish these BGP neighbo=
r types.

Regards,
Jakob.


-----Original Message-----
From: Jeffrey Haas <jhaas@pfrc.org>=20
Sent: Monday, July 16, 2018 1:39 PM

> In addition, I would like a TLV that contains a network name. Every speak=
er in the same network will have the same network name. This can be used to=
 contain the discovery process within a named network if multiple networks =
are connected together.

I'm not sure I follow your use case, but prior discussion about names over
BGP capabilities that help with the link local case definitely fit into thi=
s
rough space.

-- Jeff


From nobody Wed Jul 18 08:33:40 2018
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From: Robert Raszuk <robert@raszuk.net>
Date: Wed, 18 Jul 2018 17:33:35 +0200
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To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
Cc: Jeffrey Haas <jhaas@pfrc.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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> A TLV to signal a network name can be used to distinguish these BGP
> neighbor types.
>

=E2=80=8BAnd how do you protect from spoofing such network name ?

Regards,
Robert.

=E2=80=8B

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div=
>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex">A TLV to signal a network name =
can be used to distinguish these BGP neighbor types.<br></blockquote><div><=
br></div><div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">=E2=80=8BAnd how do you protect from spoof=
ing such network name ?=C2=A0</div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Regards,</div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif;font-size:small">Robert.</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">=E2=80=8B</div><br></div></div></div></div>

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: Jeffrey Haas <jhaas@pfrc.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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--_000_c5300305ef224b6b974751bad7fa8302XCHALN014ciscocom_--


From nobody Wed Jul 18 08:47:16 2018
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From: Jeffrey Haas <jhaas@pfrc.org>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Jakob,

On Wed, Jul 18, 2018 at 03:17:58PM +0000, Jakob Heitz (jheitz) wrote:
> There may be two network operators that want to auto-discover their own networks.
> All their routers speak BGP.
> They may peer with each other, but do not want to auto-discover each other.
> They may peer with a protocol other than BGP.
> They may peer with BGP, but apply different routing policies.
> Whatever the case, they will treat the peering neighbor differently to their own neighbors.
> A TLV to signal a network name can be used to distinguish these BGP neighbor types.

Ok.  You're asking after both identity, and potentially some sort of device
class, along with some name spacing.

Reasonable things, although I think we have different ideas about the
specifics right now.

-- Jeff


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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery

(July 2 - July 16). 

 

The WG chairs conclude on my original questions that: 

1)  There is WG interest to have an auto-discovery mechanism 

that will work for BGP peers in Data Centers

 

2)  There is some WG  interest having this work

in other deployments. 

 

3)  There is no consensus on the mechanisms 

(BGP hellos or other mechanisms) 

Or requirements for the mechanisms. 

 

4)  There is WG consensus and AD Consensus that we should 

collaborate with LSVR. One mechanism for both would 

be good, but it needs to fit the requirements set

by the WG.  

 

There is no consensus on adoption this draft. 

 

During today's IDR session (18:10-19:10), we will have a 

discussion on the requirements for the auto-discovery mechanisms. 

We will start by reviewing the LSVR requirement set.

 

If our discussions today do not come to a clear conclusion, 

the chairs are willing to sponsor an interim on the topic. 

 

Susan Hares and John Scudder. 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Monday, July 2, 2018 1:09 PM
To: idr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org
Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery

 

Greetings: 

 

This begins a 2 week WG adoption call for
draft-xu-idr-neighbor-autodiscovery (July 2 - July 16).  

 

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

 

The authors of this draft should send their IPR statements in response to
this email.  I hope the authors will ihelp their vacationing co-authors to
respond by July 7th.  

 

The WG should consider the following: 

1)      Does BGP need to have an autodiscovery mechanism for peers within
Data Centers? 

2)      Does this mechanism work for other deployments? 

 

3)      If so, should be passed in BGP Hello message?  

Or should it be a part of another protocol (e.g. LLDP, BFD, etc). 

 

4)      Does this interact with any of the LSVR work? 

 

I want to thank the authors for their patience while we sorted through some
of the WG LC for other drafts.  We decided to wait until some of those
discussion were cleared up prior to starting a new WG Adoption call.

 

 

Susan Hares 


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--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>This closes the 2 week =
adoption for draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'> (July 2 &#8211; July 16). <o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>The WG chairs conclude on my original questions =
that: <o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo5'><![if =
!supportLists]><span style=3D'font-family:"Courier =
New";color:#1F497D'><span style=3D'mso-list:Ignore'>1)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is WG interest =
to have an auto-discovery mechanism <o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>that will work for BGP peers in Data =
Centers<o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo5'><![if !supportLists]><span style=3D'font-family:"Courier =
New";color:#1F497D'><span style=3D'mso-list:Ignore'>2)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is some WG =
&nbsp;interest having this work<o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>in other deployments. <o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo5'><![if !supportLists]><span style=3D'font-family:"Courier =
New";color:#1F497D'><span style=3D'mso-list:Ignore'>3)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is no consensus =
on the mechanisms <o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>(BGP hellos or other mechanisms) =
<o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'font-family:"Courier New";color:#1F497D'>Or requirements for =
the mechanisms. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo5'><![if !supportLists]><span style=3D'font-family:"Courier =
New";color:#1F497D'><span style=3D'mso-list:Ignore'>4)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp; =
</span></span></span><![endif]><span dir=3DLTR></span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is WG consensus =
and AD Consensus that we should <o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>collaborate with LSVR. One mechanism for both would =
<o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'font-family:"Courier New";color:#1F497D'>be good, but it needs =
to fit the requirements set<o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>by the WG. &nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>There is no consensus on adoption this draft. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>During today&#8217;s IDR session (18:10-19:10), we =
will have a <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>discussion on the =
requirements for the auto-discovery mechanisms. <o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>We will start by reviewing the LSVR requirement =
set.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>If our discussions today do not come to a clear =
conclusion, <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>the chairs are willing =
to sponsor an interim on the topic. <o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>Susan Hares and John Scudder. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Susan =
Hares<br><b>Sent:</b> Monday, July 2, 2018 1:09 PM<br><b>To:</b> =
idr@ietf.org<br><b>Cc:</b> =
draft-xu-idr-neighbor-autodiscovery@ietf.org<br><b>Subject:</b> [Idr] WG =
adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Greetings: =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 &#8211; July 16).&nbsp; =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscov=
ery/">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscover=
y/</a><o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>The authors of this draft should send their IPR =
statements in response to this email. &nbsp;I hope the authors will =
ihelp their vacationing co-authors to respond by July =
7<sup>th</sup>.&nbsp; <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>The WG =
should consider the following: <o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l3 level1 =
lfo2'><![if !supportLists]><span style=3D'mso-list:Ignore'>1)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>Does BGP need to have an =
autodiscovery mechanism for peers within Data Centers? <o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l3 level1 =
lfo2'><![if !supportLists]><span style=3D'mso-list:Ignore'>2)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>Does this mechanism work =
for other deployments? <o:p></o:p></p><p =
class=3DMsoListParagraph><o:p>&nbsp;</o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l3 level1 =
lfo2'><![if !supportLists]><span style=3D'mso-list:Ignore'>3)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>If so, should be passed =
in BGP Hello message?&nbsp; <o:p></o:p></p><p =
class=3DMsoListParagraph>Or should it be a part of another protocol =
(e.g. LLDP, BFD, etc). <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l3 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>4)<span =
style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]><span dir=3DLTR></span>Does this interact with =
any of the LSVR work? <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>I want to =
thank the authors for their patience while we sorted through some of the =
WG LC for other drafts.&nbsp; We decided to wait until some of those =
discussion were cleared up prior to starting a new WG Adoption =
call.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Susan Hares =
<o:p></o:p></p></div></body></html>
------=_NextPart_000_0013_01D41F23.2F4D52A0--


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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/MDXBVuZN3QQIXtG66um2FH-VGq4>
Subject: [Idr] Note-taking today (and tomorrow)
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Hi All,

We have only one hour in today's session and a full agenda. We will plan to=
 start promptly and would like to make the fullest use of our time and NOT =
sit around waiting for note-taking volunteers.

If you are willing to take notes, please let us know! If you are willing to=
 participate in crowdsourced notes (I find this works very well when I'm th=
e note-taker in other groups) here is the Etherpad link:

http://etherpad.tools.ietf.org/p/notes-ietf-102-idr?useMonospaceFont=3Dtrue

Similar will be true tomorrow. Jabber help also appreciated:

xmpp:idr@jabber.ietf.org?join

Thanks in advance,

--John=


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Date: Thu, 19 Jul 2018 17:15:33 -0400
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apologies; i am not volunnteering ffor scribe or jabber anywhere as i
have the mac keyboard disease

randy


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From: Job Snijders <job@instituut.net>
Date: Thu, 19 Jul 2018 21:16:36 +0000
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Subject: Re: [Idr] Note-taking today (and tomorrow)
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I can take notes, but not jabber.

On Thu, Jul 19, 2018 at 9:15 PM, Randy Bush <randy@psg.com> wrote:
> apologies; i am not volunnteering ffor scribe or jabber anywhere as i
> have the mac keyboard disease
>
> randy
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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From: John Scudder <jgs@juniper.net>
To: EXT - randy <randy@psg.com>
CC: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Note-taking today (and tomorrow)
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/mddM73xHDDLOf270b8slc8nPl9w>
Subject: Re: [Idr] Note-taking today (and tomorrow)
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I hear it can be cured by a class-action lawsuit.

Actually we have a note-taker, thanks very much Gunter. (Although crowdsour=
cing is always welcome from those who want to help, see previous Etherpad U=
RL)

--John

> On Jul 19, 2018, at 5:15 PM, Randy Bush <randy@psg.com> wrote:
>=20
> apologies; i am not volunnteering ffor scribe or jabber anywhere as i
> have the mac keyboard disease
>=20
> randy


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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/3GNr0hU4R9JXrHLe_j1uMxYPR3M>
Subject: [Idr] Questions on your presentations ...
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--00000000000093dc3605716209bb
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Hi Jakob,
1. I noticed you are pushing in parallel variable length TLVs in BGP Hellos
.. do you expect this to also take years to implement ? So you are saying
it take too long to write code for variable length TLVs - I assume this
does apply to BGP Hellos TLVs ...
=E2=80=8B
2. Why not RTC also based on Standard and Large Communities ? =E2=80=8B

3. +1 to Jeff's & Keyur's comments

4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insane
- not only obvious but then you would need to get complex dealing with
different/opposite filtering results from different RTCs SAFIs.

Cheers,
R.

--00000000000093dc3605716209bb
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif">

<div class=3D"gmail-chat-header" style=3D"border-bottom:1px solid rgb(204,2=
04,204);color:rgb(102,102,102);font-family:&quot;Helvetica Neue&quot;,Helve=
tica,Arial,sans-serif;text-align:left;background-color:rgb(255,255,255);tex=
t-decoration-style:initial;text-decoration-color:initial"></div><table bord=
er=3D"0" width=3D"100%" style=3D"max-width:100%;background-color:rgb(255,25=
5,255);border-collapse:collapse;color:rgb(102,102,102);font-family:&quot;He=
lvetica Neue&quot;,Helvetica,Arial,sans-serif;text-align:left;text-decorati=
on-style:initial;text-decoration-color:initial"><tbody><tr><td><span class=
=3D"gmail-chat-text" style=3D"display:block;width:386.641px;word-break:brea=
k-word"><br></span><span class=3D"gmail-chat-text" style=3D"display:block;w=
idth:386.641px;word-break:break-word">Hi Jakob,=C2=A0</span><span class=3D"=
gmail-chat-text" style=3D"display:block;width:386.641px;word-break:break-wo=
rd"><br></span><span class=3D"gmail-chat-text" style=3D"display:block;width=
:386.641px;word-break:break-word">1. I noticed you are pushing in parallel =
variable length TLVs in BGP Hellos .. do you expect this to also take years=
 to implement ? So you are saying it take too long to write code for variab=
le length TLVs - I assume this does apply to BGP Hellos TLVs ...=C2=A0=C2=
=A0</span></td></tr></tbody></table>

</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif">=E2=80=8B</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif">2. Why not RTC also based on Standard and Large =
Communities ? =E2=80=8B</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif">3. +1 to Jeff&#39;s &amp; Keyu=
r&#39;s comments</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif">4. New additional RTC SAFI for 30 oct=
ets XXXL ext communities is ... insane - not only obvious but then you woul=
d need to get complex dealing with different/opposite filtering results fro=
m different RTCs SAFIs.</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif">Cheers,<br>R.</div></div>

--00000000000093dc3605716209bb--


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From: Jeffrey Haas <jhaas@pfrc.org>
To: Robert Raszuk <robert@raszuk.net>
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On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insane
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff


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From: Robert Raszuk <robert@raszuk.net>
Date: Fri, 20 Jul 2018 01:20:39 +0200
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: idr wg <idr@ietf.org>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the
proposals being submitted and even presented at IDR. Time to learn from
past mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:

> On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> > 4. New additional RTC SAFI for 30 octets XXXL ext communities is ...
> insane
> > - not only obvious but then you would need to get complex dealing with
> > different/opposite filtering results from different RTCs SAFIs.
>
> I would like to offer a very specific reductio ad absurdum:
> I propose that the next version of communities we do, if they must be fixed
> length, must be 253 octets of value and 255 bytes of total size.
>
> If we must do fixed, do it and be done for a long while.
>
> -- Jeff
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><span style=3D"font-family:arial,sans-s=
erif;font-size:12.8px;background-color:rgb(255,255,255);text-decoration-sty=
le:initial;text-decoration-color:initial;float:none;display:inline"><br></s=
pan></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small">

<span style=3D"font-family:arial,sans-serif;font-size:12.8px;background-col=
or:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:ini=
tial;float:none;display:inline">&gt; If we must do fixed</span>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">I do not think =
we must do fixed. I see no reason to stick with fixed.=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">Experience has proven that fixed doe=
s not work .. we see this clear in the proposals being submitted and even p=
resented at IDR. Time to learn from past mistakes.=C2=A0</div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Thx,<br>Robert</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On=
 Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <span dir=3D"ltr">&lt;<a href=
=3D"mailto:jhaas@pfrc.org" target=3D"_blank">jhaas@pfrc.org</a>&gt;</span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex">On Fri, Jul 20, 2018 at 12:52:44AM=
 +0200, Robert Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
</blockquote></div><br></div>

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Subject: [Idr] Automatic session provisioning ....
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Dear WG,

Actually I think Randy's show was quite right on the spot today !

There is a lot of junk around blowing out BGP to do a lot of stuff which it
does not need to do.

LSVR should IMHO propose a topo discovery for their own purpose and IDR
should have nothing to do with it.

Of course link state with flooding reduction can scale to much more then
10K nodes (**), but the point is valid that not everyone (especially the
white box vendors + software running on those OEMs) will implement it -
(personally I it would be awesome to see that happen soon - and there are
few players of white box OEM control planes here capable of doing it quite
well).

But what is there for IDR .. well a very basic configuration automation for
those MSDC-want to be - maybe still useful as not everyone will jump into
LSVR or get other routing operating systems .. hence my very basic proposal
in this space within IDR space.

Kind regards,
Robert.

**  - ISIS without any flooding optimizations does scale to 3K nodes of WAN
so potentially much more chatty then any DC space. And that is with few
well known SPF and flooding optimizations (partial SPF, exp backoff etc ...)

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Dear WG,</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small">Actually I think Randy&#39;s show was quite right on=
 the spot today !=C2=A0</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">There is a lot of junk around blowing out BGP to do a lot of stuff which =
it does not need to do.=C2=A0</div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">LSVR should IMHO propose a topo discovery for their own purpose an=
d IDR should have nothing to do with it.=C2=A0</div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small">Of course link state with flooding reduction can s=
cale to much more then 10K nodes (**), but the point is valid that not ever=
yone (especially the white box vendors + software running on those OEMs) wi=
ll implement it - (personally I it would be awesome to see that happen soon=
 - and there are few players of white box OEM control planes here capable o=
f doing it quite well).</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">But what is there for IDR .. well a very basic configuration automation f=
or those MSDC-want to be - maybe still useful as not everyone will jump int=
o LSVR or get other routing operating systems .. hence my very basic propos=
al in this space within IDR space.=C2=A0</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">Kind regards,</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">Robert.</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small">**=C2=A0 -=C2=A0<span style=3D"b=
ackground-color:rgb(255,255,255);text-decoration-style:initial;text-decorat=
ion-color:initial;float:none;display:inline">ISIS without any flooding opti=
mizations does scale to 3K nodes of WAN so potentially much more chatty the=
n any DC space. And that is with few well known SPF and flooding optimizati=
ons (partial SPF, exp backoff etc ...)</span></div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><span=
 style=3D"background-color:rgb(255,255,255);text-decoration-style:initial;t=
ext-decoration-color:initial;float:none;display:inline"><br></span></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><span style=3D"background-color:rgb(255,255,255);text-deco=
ration-style:initial;text-decoration-color:initial;float:none;display:inlin=
e"><br></span></div></div>

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: idr wg <idr@ietf.org>
Thread-Topic: Questions on your presentations ...
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>, Jeffrey Haas <jhaas@pfrc.org>
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Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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From: John Scudder <jgs@juniper.net>
To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
CC: Robert Raszuk <robert@raszuk.net>, Jeffrey Haas <jhaas@pfrc.org>, idr wg <idr@ietf.org>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Date: Fri, 20 Jul 2018 03:53:25 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/WYqyzXZgd6n2QgdV3K-y1Yc2CKw>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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--_000_ADAC260E566A46288F4CC7DE401A5821junipernet_
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(speaking as an individual WG contributor)

I think it is a big mistake to suggest that the reason flexcomms/wide comms=
 hasn't progressed is that it's variable-length. It's much more ambitious t=
han any of the fixed-length stuff we have, that's a reason. It's recursive,=
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.

$0.02,

--John

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <jheitz=3D40cisco.com@dm=
arc.ietf.org<mailto:jheitz=3D40cisco.com@dmarc.ietf.org>> wrote:

Not at all. Experience has shown that fixed works very well.
Large community went from concept to RFC and code complete with all the rou=
ting policy code in 2 years,
because we could reuse the community code.
Variable length communities started in 2002
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00<https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scb=
fh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rLbAvAIj9fLY=
9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&=
e=3D>
The code will have to be written from scratch.

Regards,
Jakob.

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of =
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>
Cc: idr wg <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)


> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the =
proposals being submitted and even presented at IDR. Time to learn from pas=
t mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@=
pfrc.org>> wrote:
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insa=
ne
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

_______________________________________________
Idr mailing list
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6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DANHXDEVazzM11nlzarMDH82yonWcxAh=
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--_000_ADAC260E566A46288F4CC7DE401A5821junipernet_
Content-Type: text/html; charset="us-ascii"
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;" class=3D"">
(speaking as an individual WG contributor)
<div class=3D""><br class=3D"">
</div>
<div class=3D"">I think it is a big mistake to suggest that the reason flex=
comms/wide comms hasn't progressed is that it's variable-length. It's much =
more ambitious than any of the fixed-length stuff we have, that's a reason.=
 It's recursive, that might be a reason
 too. But just because it's variable-length? Not buying it.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">$0.02,</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">--John</div>
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) &lt;<a h=
ref=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org" class=3D"">jheitz=3D40ci=
sco.com@dmarc.ietf.org</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div class=3D"WordSection1" style=3D"page: WordSection1; font-family: Helve=
tica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-=
weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px=
; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-tex=
t-stroke-width: 0px;">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">Not at all. Experience has shown that fixed works ve=
ry well.<o:p class=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">Large community went from concept to RFC and code co=
mplete with all the routing policy code in 2 years,<o:p class=3D""></o:p></=
span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">because we could reuse the community code.<o:p class=
=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">Variable length communities started in 2002<o:p clas=
s=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D""><a href=3D"https://urldefense.proofpoint.com/v2/url?=
u=3Dhttps-3A__tools.ietf.org_html_draft-2Dlange-2Dflexible-2Dbgp-2Dcommunit=
ies-2D00&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI=
&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0S=
PGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=3D" styl=
e=3D"color: purple; text-decoration: underline;" class=3D"">https://tools.i=
etf.org/html/draft-lange-flexible-bgp-communities-00</a><o:p class=3D""></o=
:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">The code will have to be written from scratch.<o:p c=
lass=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">Regards,<o:p class=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D"">Jakob.<o:p class=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 10pt; font-family: 'Courier New'; color: rgb(112,=
 48, 160);" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<b class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, sans-se=
rif;" class=3D"">From:</span></b><span style=3D"font-size: 11pt; font-famil=
y: Calibri, sans-serif;" class=3D""><span class=3D"Apple-converted-space">&=
nbsp;</span>Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" style=3D"color:=
 purple; text-decoration: underline;" class=3D"">idr-bounces@ietf.org</a>&g=
t;<span class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">On
 Behalf Of<span class=3D"Apple-converted-space">&nbsp;</span></b>Robert Ras=
zuk<br class=3D"">
<b class=3D"">Sent:</b><span class=3D"Apple-converted-space">&nbsp;</span>T=
hursday, July 19, 2018 4:21 PM<br class=3D"">
<b class=3D"">To:</b><span class=3D"Apple-converted-space">&nbsp;</span>Jef=
frey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org" style=3D"color: purple; tex=
t-decoration: underline;" class=3D"">jhaas@pfrc.org</a>&gt;<br class=3D"">
<b class=3D"">Cc:</b><span class=3D"Apple-converted-space">&nbsp;</span>idr=
 wg &lt;<a href=3D"mailto:idr@ietf.org" style=3D"color: purple; text-decora=
tion: underline;" class=3D"">idr@ietf.org</a>&gt;<br class=3D"">
<b class=3D"">Subject:</b><span class=3D"Apple-converted-space">&nbsp;</spa=
n>Re: [Idr] Fixed sized communities (was Re: Questions on your presentation=
s ...)<o:p class=3D""></o:p></span></div>
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<o:p class=3D"">&nbsp;</o:p></div>
<div class=3D"">
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p class=3D"">=
&nbsp;</o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 9.5pt; font-family: Arial, sans-serif; background=
-color: white; background-position: initial initial; background-repeat: ini=
tial initial;" class=3D"">&gt; If we must do fixed</span><span style=3D"fon=
t-family: Arial, sans-serif;" class=3D""><o:p class=3D""></o:p></span></div=
>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p class=3D"">=
&nbsp;</o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D"">I do not think w=
e must do fixed. I see no reason to stick with fixed.&nbsp;<o:p class=3D"">=
</o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p class=3D"">=
&nbsp;</o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D"">Experience has p=
roven that fixed does not work .. we see this clear in the proposals being =
submitted and even presented at IDR. Time to learn from past mistakes.&nbsp=
;<o:p class=3D""></o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p class=3D"">=
&nbsp;</o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D"">Thx,<br class=3D=
"">
Robert<o:p class=3D""></o:p></span></div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p class=3D"">=
&nbsp;</o:p></span></div>
</div>
</div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<o:p class=3D"">&nbsp;</o:p></div>
<div class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a href=3D"mailto:jhaas@p=
frc.org" target=3D"_blank" style=3D"color: purple; text-decoration: underli=
ne;" class=3D"">jhaas@pfrc.org</a>&gt; wrote:<o:p class=3D""></o:p></div>
<blockquote style=3D"border-style: none none none solid; border-left-width:=
 1pt; border-left-color: rgb(204, 204, 204); padding: 0in 0in 0in 6pt; marg=
in-left: 4.8pt; margin-right: 0in;" class=3D"">
<div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
On Fri, Jul 20, 2018 at 12:52:44AM &#43;0200, Robert Raszuk wrote:<br class=
=3D"">
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br class=3D"">
&gt; - not only obvious but then you would need to get complex dealing with=
<br class=3D"">
&gt; different/opposite filtering results from different RTCs SAFIs.<br cla=
ss=3D"">
<br class=3D"">
I would like to offer a very specific reductio ad absurdum:<br class=3D"">
I propose that the next version of communities we do, if they must be fixed=
<br class=3D"">
length, must be 253 octets of value and 255 bytes of total size.<br class=
=3D"">
<br class=3D"">
If we must do fixed, do it and be done for a long while.<br class=3D"">
<br class=3D"">
-- Jeff<br class=3D"">
<br class=3D"">
_______________________________________________<br class=3D"">
Idr mailing list<br class=3D"">
<a href=3D"mailto:Idr@ietf.org" style=3D"color: purple; text-decoration: un=
derline;" class=3D"">Idr@ietf.org</a><br class=3D"">
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: John Scudder <jgs@juniper.net>
CC: Robert Raszuk <robert@raszuk.net>, Jeffrey Haas <jhaas@pfrc.org>, idr wg <idr@ietf.org>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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The thing is I want to reuse the extended community code as much as possibl=
e.
The routing policy code and its associated configuration, show, xml and deb=
ug commands is the bulk of it.
The more you deviate, the harder it gets.
Variable length is a big deviation.

Regards,
Jakob.

From: John Scudder <jgs@juniper.net>
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: Robert Raszuk <robert@raszuk.net>; Jeffrey Haas <jhaas@pfrc.org>; idr w=
g <idr@ietf.org>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

(speaking as an individual WG contributor)

I think it is a big mistake to suggest that the reason flexcomms/wide comms=
 hasn't progressed is that it's variable-length. It's much more ambitious t=
han any of the fixed-length stuff we have, that's a reason. It's recursive,=
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.

$0.02,

--John

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <jheitz=3D40cisco.com@dm=
arc.ietf.org<mailto:jheitz=3D40cisco.com@dmarc.ietf.org>> wrote:

Not at all. Experience has shown that fixed works very well.
Large community went from concept to RFC and code complete with all the rou=
ting policy code in 2 years,
because we could reuse the community code.
Variable length communities started in 2002
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00<https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scb=
fh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rLbAvAIj9fLY=
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e=3D>
The code will have to be written from scratch.

Regards,
Jakob.

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of =
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>
Cc: idr wg <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)


> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the =
proposals being submitted and even presented at IDR. Time to learn from pas=
t mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@=
pfrc.org>> wrote:
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insa=
ne
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The thing is I want to reuse the extended co=
mmunity code as much as possible.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The routing policy code and its associated c=
onfiguration, show, xml and debug commands is the bulk of it.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The more you deviate, the harder it gets.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length is a big deviation.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> John Scudder &lt;jgs@juniper.n=
et&gt;
<br>
<b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;jheitz@cisco.com&gt;<br>
<b>Cc:</b> Robert Raszuk &lt;robert@raszuk.net&gt;; Jeffrey Haas &lt;jhaas@=
pfrc.org&gt;; idr wg &lt;idr@ietf.org&gt;<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">(speaking as an individual WG contributor) <o:p></o:=
p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">I think it is a big mistake to suggest that the reas=
on flexcomms/wide comms hasn't progressed is that it's variable-length. It'=
s much more ambitious than any of the fixed-length stuff we have, that's a =
reason. It's recursive, that might
 be a reason too. But just because it's variable-length? Not buying it.<o:p=
></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">$0.02,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">--John<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) &=
lt;<a href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org">jheitz=3D40cisco.=
com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Not at all. Experience has shown that fixed =
works very well.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Large community went from concept to RFC and=
 code complete with all the routing policy code in 2 years,</span><o:p></o:=
p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">because we could reuse the community code.</=
span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length communities started in 2002<=
/span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><a href=3D"https://urldefense.proofpoint.com=
/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dlange-2Dflexible-2Dbgp-2D=
communities-2D00&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voD=
TXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxj=
fktxXE0SPGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=
=3D"><span style=3D"color:purple">https://tools.ietf.org/html/draft-lange-f=
lexible-bgp-communities-00</span></a></span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The code will have to be written from scratc=
h.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span class=3D"apple-converted-s=
pace"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-=
serif">&nbsp;</span></span><span style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,sans-serif">Idr
 &lt;<a href=3D"mailto:idr-bounces@ietf.org"><span style=3D"color:purple">i=
dr-bounces@ietf.org</span></a>&gt;<span class=3D"apple-converted-space">&nb=
sp;</span><b>On Behalf Of<span class=3D"apple-converted-space">&nbsp;</span=
></b>Robert Raszuk<br>
<b>Sent:</b><span class=3D"apple-converted-space">&nbsp;</span>Thursday, Ju=
ly 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"apple-converted-space">&nbsp;</span>Jeffrey Haas &=
lt;<a href=3D"mailto:jhaas@pfrc.org"><span style=3D"color:purple">jhaas@pfr=
c.org</span></a>&gt;<br>
<b>Cc:</b><span class=3D"apple-converted-space">&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span style=3D"color:purple">idr@ietf.org</spa=
n></a>&gt;<br>
<b>Subject:</b><span class=3D"apple-converted-space">&nbsp;</span>Re: [Idr]=
 Fixed sized communities (was Re: Questions on your presentations ...)</spa=
n><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.5pt;font-family:&quot;Ari=
al&quot;,sans-serif;background:white">&gt; If we must do fixed</span><o:p><=
/o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I do not think we must do fixed. I see no reason to stick with fixed.&=
nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Experience has proven that fixed does not work .. we see this clear in=
 the proposals being submitted and even presented at IDR. Time to learn fro=
m past mistakes.&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<br>
Robert</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a=
 href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><span style=3D"color:purp=
le">jhaas@pfrc.org</span></a>&gt; wrote:<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 12:52:44AM &#43;0200, Robert=
 Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org"><span style=3D"color:purple">Idr@ietf.org</=
span></a><br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9v=
dCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62=
w&amp;e=3D" target=3D"_blank"><span style=3D"color:purple">https://www.ietf=
.org/mailman/listinfo/idr</span></a><o:p></o:p></p>
</div>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">_______________________________________________<br=
>
Idr mailing list<br>
</span><a href=3D"mailto:Idr@ietf.org"><span style=3D"font-size:9.0pt;font-=
family:&quot;Helvetica&quot;,sans-serif;color:purple">Idr@ietf.org</span></=
a><span style=3D"font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-ser=
if"><br>
</span><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__ww=
w.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0=
UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAI=
j9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1A=
BXs_A62w&amp;e=3D"><span style=3D"font-size:9.0pt;font-family:&quot;Helveti=
ca&quot;,sans-serif;color:purple">https://urldefense.proofpoint.com/v2/url?=
u=3Dhttps-3A__www.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkY=
uh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;=
m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarM=
DH82yonWcxAhaK1ABXs_A62w&amp;e=3D</span></a><o:p></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Hi John,

> It's recursive, that might be a reason too.

Where did you get such impression from ? Wide communities (or registered
wide communities specs) are not recursive and no nesting or inheritance was
ever the plan at the community level at least as far as my own intentions
were/are.

If there is some text in the current draft which makes you think so let's
edit it asap.

Many thx,
Robert.



On Fri, Jul 20, 2018 at 5:53 AM, John Scudder <jgs@juniper.net> wrote:

> (speaking as an individual WG contributor)
>
> I think it is a big mistake to suggest that the reason flexcomms/wide
> comms hasn't progressed is that it's variable-length. It's much more
> ambitious than any of the fixed-length stuff we have, that's a reason. It=
's
> recursive, that might be a reason too. But just because it's
> variable-length? Not buying it.
>
> $0.02,
>
> --John
>
> On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <
> jheitz=3D40cisco.com@dmarc.ietf.org> wrote:
>
> Not at all. Experience has shown that fixed works very well.
> Large community went from concept to RFC and code complete with all the
> routing policy code in 2 years,
> because we could reuse the community code.
> Variable length communities started in 2002
> https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_ht=
ml_draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh6=
3rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rL=
bAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz=
4ecF7I8Wc&e=3D>
> The code will have to be written from scratch.
>
> Regards,
> Jakob.
>
> *From:* Idr <idr-bounces@ietf.org> *On Behalf Of *Robert Raszuk
> *Sent:* Thursday, July 19, 2018 4:21 PM
> *To:* Jeffrey Haas <jhaas@pfrc.org>
> *Cc:* idr wg <idr@ietf.org>
> *Subject:* Re: [Idr] Fixed sized communities (was Re: Questions on your
> presentations ...)
>
>
> > If we must do fixed
>
> I do not think we must do fixed. I see no reason to stick with fixed.
>
> Experience has proven that fixed does not work .. we see this clear in th=
e
> proposals being submitted and even presented at IDR. Time to learn from
> past mistakes.
>
> Thx,
> Robert
>
>
> On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:
>
> On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> > 4. New additional RTC SAFI for 30 octets XXXL ext communities is ...
> insane
> > - not only obvious but then you would need to get complex dealing with
> > different/opposite filtering results from different RTCs SAFIs.
>
> I would like to offer a very specific reductio ad absurdum:
> I propose that the next version of communities we do, if they must be fix=
ed
> length, must be 253 octets of value and 255 bytes of total size.
>
> If we must do fixed, do it and be done for a long while.
>
> -- Jeff
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
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--0000000000005d082b05716a21fb
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi John,<br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,s=
ans-serif;font-size:small">

<span style=3D"font-family:arial,sans-serif;background-color:rgb(255,255,25=
5);text-decoration-style:initial;text-decoration-color:initial;float:none;d=
isplay:inline">&gt; It&#39;s recursive, that might be a reason too.</span>

<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Where did you g=
et such impression from ? Wide communities (or registered wide communities =
specs) are not recursive and no nesting or inheritance was ever the plan at=
 the community level at least as far as my own intentions were/are.=C2=A0</=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small">If there is some text i=
n the current draft which makes you think so let&#39;s edit it asap.=C2=A0<=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">Many thx,<br>Robert.</=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D=
"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Jul 20, 2018 at 5:53 A=
M, John Scudder <span dir=3D"ltr">&lt;<a href=3D"mailto:jgs@juniper.net" ta=
rget=3D"_blank">jgs@juniper.net</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">



<div style=3D"word-wrap:break-word">
(speaking as an individual WG contributor)
<div><br>
</div>
<div>I think it is a big mistake to suggest that the reason flexcomms/wide =
comms hasn&#39;t progressed is that it&#39;s variable-length. It&#39;s much=
 more ambitious than any of the fixed-length stuff we have, that&#39;s a re=
ason. It&#39;s recursive, that might be a reason
 too. But just because it&#39;s variable-length? Not buying it.</div>
<div><br>
</div>
<div>$0.02,</div>
<div><br>
</div>
<div>--John</div>
<div><br>
<div>
<blockquote type=3D"cite"><div><div class=3D"h5">
<div>On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) &lt;<a href=3D"mail=
to:jheitz=3D40cisco.com@dmarc.ietf.org" target=3D"_blank">jheitz=3D40cisco.=
com@dmarc.<wbr>ietf.org</a>&gt; wrote:</div>
<br class=3D"m_2771411315924888003Apple-interchange-newline">
</div></div><div><div><div class=3D"h5">
<div class=3D"m_2771411315924888003WordSection1" style=3D"font-family:Helve=
tica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:=
normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transfor=
m:none;white-space:normal;word-spacing:0px">
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">Not at all. Experience has shown that fixed works very well.<u>=
</u><u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">Large community went from concept to RFC and code complete with=
 all the routing policy code in 2 years,<u></u><u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">because we could reuse the community code.<u></u><u></u></span>=
</div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">Variable length communities started in 2002<u></u><u></u></span=
></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)"><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3=
A__tools.ietf.org_html_draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&am=
p;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhL=
t5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&am=
p;s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=3D" style=3D"color:=
purple;text-decoration:underline" target=3D"_blank">https://tools.ietf.org/=
html/<wbr>draft-lange-flexible-bgp-<wbr>communities-00</a><u></u><u></u></s=
pan></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">The code will have to be written from scratch.<u></u><u></u></s=
pan></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">Regards,<u></u><u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)">Jakob.<u></u><u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:10pt;font-family:&#39;Courier New&#39;;color:rgb(1=
12,48,160)"><u></u>=C2=A0<u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<b><span style=3D"font-size:11pt;font-family:Calibri,sans-serif">From:</spa=
n></b><span style=3D"font-size:11pt;font-family:Calibri,sans-serif"><span c=
lass=3D"m_2771411315924888003Apple-converted-space">=C2=A0</span>Idr &lt;<a=
 href=3D"mailto:idr-bounces@ietf.org" style=3D"color:purple;text-decoration=
:underline" target=3D"_blank">idr-bounces@ietf.org</a>&gt;<span class=3D"m_=
2771411315924888003Apple-converted-space">=C2=A0</span><b>On
 Behalf Of<span class=3D"m_2771411315924888003Apple-converted-space">=C2=A0=
</span></b>Robert Raszuk<br>
<b>Sent:</b><span class=3D"m_2771411315924888003Apple-converted-space">=C2=
=A0</span>Thursday, July 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"m_2771411315924888003Apple-converted-space">=C2=A0=
</span>Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org" style=3D"color:pu=
rple;text-decoration:underline" target=3D"_blank">jhaas@pfrc.org</a>&gt;<br=
>
<b>Cc:</b><span class=3D"m_2771411315924888003Apple-converted-space">=C2=A0=
</span>idr wg &lt;<a href=3D"mailto:idr@ietf.org" style=3D"color:purple;tex=
t-decoration:underline" target=3D"_blank">idr@ietf.org</a>&gt;<br>
<b>Subject:</b><span class=3D"m_2771411315924888003Apple-converted-space">=
=C2=A0</span>Re: [Idr] Fixed sized communities (was Re: Questions on your p=
resentations ...)<u></u><u></u></span></div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<u></u>=C2=A0<u></u></div>
<div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif"><u></u>=C2=A0<u></u></span></d=
iv>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-size:9.5pt;font-family:Arial,sans-serif;background-colo=
r:white;background-position:initial initial;background-repeat:initial initi=
al">&gt; If we must do fixed</span><span style=3D"font-family:Arial,sans-se=
rif"><u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif"><u></u>=C2=A0<u></u></span></d=
iv>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif">I do not think we must do fixe=
d. I see no reason to stick with fixed.=C2=A0<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif"><u></u>=C2=A0<u></u></span></d=
iv>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif">Experience has proven that fix=
ed does not work .. we see this clear in the proposals being submitted and =
even presented at IDR. Time to learn from past mistakes.=C2=A0<u></u><u></u=
></span></div>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif"><u></u>=C2=A0<u></u></span></d=
iv>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif">Thx,<br>
Robert<u></u><u></u></span></div>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<span style=3D"font-family:Arial,sans-serif"><u></u>=C2=A0<u></u></span></d=
iv>
</div>
</div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<u></u>=C2=A0<u></u></div>
<div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a href=3D"mailto:jhaas@p=
frc.org" style=3D"color:purple;text-decoration:underline" target=3D"_blank"=
>jhaas@pfrc.org</a>&gt; wrote:<u></u><u></u></div>
<blockquote style=3D"border-style:none none none solid;border-left-width:1p=
t;border-left-color:rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.=
8pt;margin-right:0in">
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
______________________________<wbr>_________________<br>
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</blockquote>
</div>
<div style=3D"margin:0in 0in 0.0001pt;font-size:12pt;font-family:&#39;Times=
 New Roman&#39;,serif">
<u></u>=C2=A0<u></u></div>
</div>
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</div>
</blockquote>
</div>
<br>
</div>
</div>

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

--0000000000005d082b05716a21fb--


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To: "'Jakob Heitz \(jheitz\)'" <jheitz=40cisco.com@dmarc.ietf.org>, "'John Scudder'" <jgs@juniper.net>
Cc: "'idr wg'" <idr@ietf.org>, "'Robert Raszuk'" <robert@raszuk.net>
References: <CA+b+ERkbN==4wzL0K4OqunaPyu0Bw6A3dfFUAu5-NLT35vCf6w@mail.gmail.com> <20180719231119.GB10999@pfrc.org> <CA+b+ER=7dU_odxoMYpq-pbKfp=h3xTu1Y9gEKoGy6caJLb19qA@mail.gmail.com> <3a8b0cff4cdf4968b950d5e43810602a@XCH-ALN-014.cisco.com> <ADAC260E-566A-4628-8F4C-C7DE401A5821@juniper.net> <5e8e2b88c99044d8bed2fffa38720532@XCH-ALN-014.cisco.com>
In-Reply-To: <5e8e2b88c99044d8bed2fffa38720532@XCH-ALN-014.cisco.com>
Date: Fri, 20 Jul 2018 06:25:19 -0400
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/34XDqPoRg25XwSQW0Frcs7m807Y>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Jakob:

<individual contributor hat on> 

 

Two groups of people use BGP.  The BGP-LS people who feel adding TLVs and
TLVs of information is acceptable.  

You claim 1 TLVs is "too much" so that we must spin multiple sizes of
communities.    

Hmm. 

 

<individual contributor hat still on> 

 

Cheerily, Sue 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 12:05 AM
To: John Scudder
Cc: idr wg; Robert Raszuk
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ...)

 

The thing is I want to reuse the extended community code as much as
possible.

The routing policy code and its associated configuration, show, xml and
debug commands is the bulk of it.

The more you deviate, the harder it gets.

Variable length is a big deviation.

 

Regards,

Jakob.

 

From: John Scudder <jgs@juniper.net> 
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: Robert Raszuk <robert@raszuk.net>; Jeffrey Haas <jhaas@pfrc.org>; idr wg
<idr@ietf.org>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ...)

 

(speaking as an individual WG contributor) 

 

I think it is a big mistake to suggest that the reason flexcomms/wide comms
hasn't progressed is that it's variable-length. It's much more ambitious
than any of the fixed-length stuff we have, that's a reason. It's recursive,
that might be a reason too. But just because it's variable-length? Not
buying it.

 

$0.02,

 

--John

 

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz)
<jheitz=40cisco.com@dmarc.ietf.org> wrote:

 

Not at all. Experience has shown that fixed works very well.

Large community went from concept to RFC and code complete with all the
routing policy code in 2 years,

because we could reuse the community code.

Variable length communities started in 2002

 
<https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_dr
aft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=DwMGaQ&c=HAkYuh63rsuhr6Scb
fh0UjBXeMK-ndb3voDTXcWzoCI&r=hLt5iDJpw7ukqICc0hoT7A&m=2hIY6rLbAvAIj9fLY9vdCZ
MdoxjfktxXE0SPGa4SW9Y&s=RAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&e=>
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00

The code will have to be written from scratch.

 

Regards,

Jakob.

 

From: Idr < <mailto:idr-bounces@ietf.org> idr-bounces@ietf.org> On Behalf Of
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas < <mailto:jhaas@pfrc.org> jhaas@pfrc.org>
Cc: idr wg < <mailto:idr@ietf.org> idr@ietf.org>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ...)

 

 

> If we must do fixed

 

I do not think we must do fixed. I see no reason to stick with fixed. 

 

Experience has proven that fixed does not work .. we see this clear in the
proposals being submitted and even presented at IDR. Time to learn from past
mistakes. 

 

Thx,
Robert

 

 

On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas < <mailto:jhaas@pfrc.org>
jhaas@pfrc.org> wrote:

On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ...
insane
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

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_______________________________________________
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 <mailto:Idr@ietf.org> Idr@ietf.org
 
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istinfo_idr&d=DwICAg&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=hLt5iDJ
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w7ukqICc0hoT7A&m=2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&s=ANHXDEVazzM11
nlzarMDH82yonWcxAhaK1ABXs_A62w&e=

 


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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jakob:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;individual contributor hat on&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Two groups of people use BGP.&nbsp; The BGP-LS people who feel adding =
TLVs and TLVs of information is acceptable. =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You claim 1 TLVs is &#8220;too much&#8221; so that we must spin =
multiple sizes of communities.&nbsp;&nbsp; =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hmm. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;individual contributor hat still on&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Cheerily, Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Jakob Heitz =
(jheitz)<br><b>Sent:</b> Friday, July 20, 2018 12:05 AM<br><b>To:</b> =
John Scudder<br><b>Cc:</b> idr wg; Robert Raszuk<br><b>Subject:</b> Re: =
[Idr] Fixed sized communities (was Re: Questions on your presentations =
...)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>The =
thing is I want to reuse the extended community code as much as =
possible.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>The =
routing policy code and its associated configuration, show, xml and =
debug commands is the bulk of it.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>The more you deviate, the harder it =
gets.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Variable length is a big =
deviation.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Regards,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Jakob.<o:p></o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><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=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> John =
Scudder &lt;jgs@juniper.net&gt; <br><b>Sent:</b> Thursday, July 19, 2018 =
8:53 PM<br><b>To:</b> Jakob Heitz (jheitz) =
&lt;jheitz@cisco.com&gt;<br><b>Cc:</b> Robert Raszuk =
&lt;robert@raszuk.net&gt;; Jeffrey Haas &lt;jhaas@pfrc.org&gt;; idr wg =
&lt;idr@ietf.org&gt;<br><b>Subject:</b> Re: [Idr] Fixed sized =
communities (was Re: Questions on your presentations =
...)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>(speaking as =
an individual WG contributor) <o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal>I =
think it is a big mistake to suggest that the reason flexcomms/wide =
comms hasn't progressed is that it's variable-length. It's much more =
ambitious than any of the fixed-length stuff we have, that's a reason. =
It's recursive, that might be a reason too. But just because it's =
variable-length? Not buying it.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>$0.02,<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>--John<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal>On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) =
&lt;<a =
href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org">jheitz=3D40cisco.com@=
dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Not at all. Experience has shown that fixed works =
very well.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>Large =
community went from concept to RFC and code complete with all the =
routing policy code in 2 years,</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>because we could reuse the community =
code.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Variable length communities started in =
2002</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf=
.org_html_draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&amp;d=3DDwMGa=
Q&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7u=
kqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DR=
AOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=3D"><span =
style=3D'color:purple'>https://tools.ietf.org/html/draft-lange-flexible-b=
gp-communities-00</span></a></span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>The code will have to be written from =
scratch.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>&nbsp;</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Regards,</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Jakob.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>&nbsp;</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span class=3Dapple-converted-space><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>&nbsp;</spa=
n></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>Idr &lt;<a =
href=3D"mailto:idr-bounces@ietf.org"><span =
style=3D'color:purple'>idr-bounces@ietf.org</span></a>&gt;<span =
class=3Dapple-converted-space>&nbsp;</span><b>On Behalf Of<span =
class=3Dapple-converted-space>&nbsp;</span></b>Robert =
Raszuk<br><b>Sent:</b><span =
class=3Dapple-converted-space>&nbsp;</span>Thursday, July 19, 2018 4:21 =
PM<br><b>To:</b><span class=3Dapple-converted-space>&nbsp;</span>Jeffrey =
Haas &lt;<a href=3D"mailto:jhaas@pfrc.org"><span =
style=3D'color:purple'>jhaas@pfrc.org</span></a>&gt;<br><b>Cc:</b><span =
class=3Dapple-converted-space>&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span =
style=3D'color:purple'>idr@ietf.org</span></a>&gt;<br><b>Subject:</b><spa=
n class=3Dapple-converted-space>&nbsp;</span>Re: [Idr] Fixed sized =
communities (was Re: Questions on your presentations =
...)</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";background:whit=
e'>&gt; If we must do =
fixed</span><o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>I do not think we must do =
fixed. I see no reason to stick with =
fixed.&nbsp;</span><o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Experience has proven that =
fixed does not work .. we see this clear in the proposals being =
submitted and even presented at IDR. Time to learn from past =
mistakes.&nbsp;</span><o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Thx,<br>Robert</span><o:p></o:=
p></p></div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div></div><div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><div><p =
class=3DMsoNormal>On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a =
href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><span =
style=3D'color:purple'>jhaas@pfrc.org</span></a>&gt; =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt'><div><p class=3DMsoNormal>On Fri, Jul 20, 2018 at 12:52:44AM =
+0200, Robert Raszuk wrote:<br>&gt; 4. New additional RTC SAFI for 30 =
octets XXXL ext communities is ... insane<br>&gt; - not only obvious but =
then you would need to get complex dealing with<br>&gt; =
different/opposite filtering results from different RTCs SAFIs.<br><br>I =
would like to offer a very specific reductio ad absurdum:<br>I propose =
that the next version of communities we do, if they must be =
fixed<br>length, must be 253 octets of value and 255 bytes of total =
size.<br><br>If we must do fixed, do it and be done for a long =
while.<br><br>-- =
Jeff<br><br>_______________________________________________<br>Idr =
mailing list<br><a href=3D"mailto:Idr@ietf.org"><span =
style=3D'color:purple'>Idr@ietf.org</span></a><br><a =
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------=_NextPart_000_00AD_01D41FF2.6EC86300--


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From: John Scudder <jgs@juniper.net>
To: Robert Raszuk <robert@raszuk.net>
CC: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, Jeffrey Haas <jhaas@pfrc.org>, idr wg <idr@ietf.org>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fqFsx2s2MYy-y-I5Mvq-o8jHT4A>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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On Jul 20, 2018, at 4:32 AM, Robert Raszuk <robert@raszuk.net<mailto:robert=
@raszuk.net>> wrote:

Where did you get such impression from ? Wide communities (or registered wi=
de communities specs) are not recursive and no nesting or inheritance was e=
ver the plan at the community level at least as far as my own intentions we=
re/are.

No doubt I've misremembered, I didn't go back to refer to the spec (nor hav=
e I now). I'll withdraw that remark and let stand the "variable-length is n=
ot actually that hard" comment. :-)

Since I'm taking up the list's time anyway, I'll add that yes, of course va=
riable is slightly harder than fixed-length as Jakob says -- taken in isola=
tion. I'm not at all convinced it's harder than every year or two implement=
ing (specifying, maintaining) yet another slightly different fixed-size var=
iant. (That comment addressed to the original topic and not to you, of cour=
se.)

--John

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>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;" class=3D"">
On Jul 20, 2018, at 4:32 AM, Robert Raszuk &lt;<a href=3D"mailto:robert@ras=
zuk.net" class=3D"">robert@raszuk.net</a>&gt; wrote:<br class=3D"">
<div>
<blockquote type=3D"cite" class=3D""><br class=3D"Apple-interchange-newline=
">
<div class=3D"">
<div class=3D"gmail_default" style=3D"font-style: normal; font-variant-caps=
: normal; font-weight: normal; letter-spacing: normal; text-align: start; t=
ext-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0=
px; -webkit-text-stroke-width: 0px; font-family: arial, helvetica, sans-ser=
if; font-size: small;">
Where did you get such impression from ? Wide communities (or registered wi=
de communities specs) are not recursive and no nesting or inheritance was e=
ver the plan at the community level at least as far as my own intentions we=
re/are.&nbsp;</div>
</div>
</blockquote>
<br class=3D"">
</div>
<div>No doubt I've misremembered, I didn't go back to refer to the spec (no=
r have I now). I'll withdraw that remark and let stand the &quot;variable-l=
ength is not actually that hard&quot; comment. :-)</div>
<div><br class=3D"">
</div>
<div>Since I'm taking up the list's time anyway, I'll add that yes, of cour=
se variable is slightly harder than fixed-length as Jakob says -- taken in =
isolation. I'm not at all convinced it's harder than every year or two impl=
ementing (specifying, maintaining)
 yet another slightly different fixed-size variant. (That comment addressed=
 to the original topic and not to you, of course.)</div>
<div><br class=3D"">
</div>
<div>--John</div>
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From nobody Fri Jul 20 04:18:10 2018
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From: "Susan Hares" <shares@ndzh.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/1utRlv1vBxldYvQNIVYNC2b9hSQ>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Xiaohu:

=20

Our next step is to gather requirements for the IDR neighbor discovery =
from the WG.  We would especially be interested in feedback on =
requirements from operators of data centers.  If you know of an =
operators of medium data centers who could send requirements to the IDR =
chairs or the IDR list, it would be helpful.

=20

Cheerily, Susan Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of ???(??)
Sent: Friday, July 20, 2018 7:12 AM
To: Idr; idr
Cc: draft-xu-idr-neighbor-autodiscovery
Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

=20

Hi Sue,

=20

Thanks for launching the WG adoption call for =
draft-xu-idr-neighbor-autodiscovery.

=20

Hi all,

=20

There has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other vendors =
are under construction. If any of you have any concrete and technical =
concerns on this mechanism, please feel free to tell us and we would =
like to verify your concerns on the implementation and then give you =
feedbacks.

=20

Best regards,

Xiaohu

------------------------------------------------------------------

From:Susan Hares <shares@ndzh.com>

Send =
Time:2018=E5=B9=B47=E6=9C=8819=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) =
17:59

To:idr <idr@ietf.org>

Cc:draft-xu-idr-neighbor-autodiscovery =
<draft-xu-idr-neighbor-autodiscovery@ietf.org>

Subject:Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery

(July 2 =E2=80=93 July 16).=20

=20

The WG chairs conclude on my original questions that:=20

1)  There is WG interest to have an auto-discovery mechanism=20

that will work for BGP peers in Data Centers

=20

2)  There is some WG  interest having this work

in other deployments.=20

=20

3)  There is no consensus on the mechanisms=20

(BGP hellos or other mechanisms)=20

Or requirements for the mechanisms.=20

=20

4)  There is WG consensus and AD Consensus that we should=20

collaborate with LSVR. One mechanism for both would=20

be good, but it needs to fit the requirements set

by the WG. =20

=20

There is no consensus on adoption this draft.=20

=20

During today=E2=80=99s IDR session (18:10-19:10), we will have a=20

discussion on the requirements for the auto-discovery mechanisms.=20

We will start by reviewing the LSVR requirement set.

=20

If our discussions today do not come to a clear conclusion,=20

the chairs are willing to sponsor an interim on the topic.=20

=20

Susan Hares and John Scudder.=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Monday, July 2, 2018 1:09 PM
To: idr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org
Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery

=20

Greetings:=20

=20

This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16). =20

=20

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

=20

The authors of this draft should send their IPR statements in response =
to this email.  I hope the authors will ihelp their vacationing =
co-authors to respond by July 7th. =20

=20

The WG should consider the following:=20

1)      Does BGP need to have an autodiscovery mechanism for peers =
within Data Centers?=20

2)      Does this mechanism work for other deployments?=20

=20

3)      If so, should be passed in BGP Hello message? =20

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=20

=20

4)      Does this interact with any of the LSVR work?=20

=20

I want to thank the authors for their patience while we sorted through =
some of the WG LC for other drafts.  We decided to wait until some of =
those discussion were cleared up prior to starting a new WG Adoption =
call.

=20

=20

Susan Hares=20

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Xiaohu:<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Our next step is to =
gather requirements for the IDR neighbor discovery from the WG. =C2=A0We =
would especially be interested in feedback on requirements from =
operators of data centers.=C2=A0 If you know of an operators of medium =
data centers who could send requirements to the IDR chairs or the IDR =
list, it would be helpful.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Cheerily, Susan Hares =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-US'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-US'> Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of =
</b>???(??)<br><b>Sent:</b> Friday, July 20, 2018 7:12 AM<br><b>To:</b> =
Idr; idr<br><b>Cc:</b> =
draft-xu-idr-neighbor-autodiscovery<br><b>Subject:</b> Re: [Idr] WG =
adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Hi Sue,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Thanks for launching the WG adoption call for&nbsp;<span =
style=3D'background:white'>draft-xu-idr-neighbor-autodiscovery.</span><o:=
p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Hi all,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
There has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other =
vendors&nbsp;are under construction. If any of you have any concrete and =
technical&nbsp;concerns on this mechanism, please feel free to&nbsp;tell =
us and we would like to verify your&nbsp;concerns on the implementation =
and then give you feedbacks.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Best regards,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Xiaohu<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
------------------------------------------------------------------<o:p></=
o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
From:Susan Hares =
&lt;shares@ndzh.com&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Send Time:2018</span><span lang=3DZH-CN =
style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E5=B9=B4</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
7</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E6=9C=88</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
19</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E6=97=A5</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
(</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E6=98=9F=E6=9C=9F=E5=9B=9B</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
) 17:59<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
To:idr &lt;idr@ietf.org&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Cc:draft-xu-idr-neighbor-autodiscovery =
&lt;draft-xu-idr-neighbor-autodiscovery@ietf.org&gt;<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Subject:Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>This closes the 2 week =
adoption for draft-xu-idr-neighbor-autodiscovery</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>(July 2 =E2=80=93 July =
16). </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>The WG chairs conclude =
on my original questions that: </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>1)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is WG interest =
to have an auto-discovery mechanism </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>that will work for BGP peers in Data =
Centers</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>2)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is some WG =
&nbsp;interest having this work</span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>in other deployments. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>3)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is no consensus =
on the mechanisms </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>(BGP hellos or other mechanisms) </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>Or requirements for the mechanisms. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>4)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is WG consensus =
and AD Consensus that we should </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>collaborate with LSVR. One mechanism for both would =
</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>be good, but it needs to fit the requirements =
set</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>by the WG. &nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is no consensus =
on adoption this draft. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>During today=E2=80=99s =
IDR session (18:10-19:10), we will have a </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>discussion on the =
requirements for the auto-discovery mechanisms. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>We will start by =
reviewing the LSVR requirement set.</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>If our discussions =
today do not come to a clear conclusion, </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>the chairs are willing =
to sponsor an interim on the topic. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>Susan Hares and John =
Scudder. </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:0in 0in 0in =
0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
 Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Susan =
Hares<br><b>Sent:</b> Monday, July 2, 2018 1:09 PM<br><b>To:</b> =
idr@ietf.org<br><b>Cc:</b> =
draft-xu-idr-neighbor-autodiscovery@ietf.org<br><b>Subject:</b> [Idr] WG =
adoption call for draft-xu-idr-neighbor-autodiscovery</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><p =
class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>Greetings: =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>This begins a 2 week WG =
adoption call for draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 =
July 16).&nbsp; <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'><a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscov=
ery/" =
target=3D"_blank">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-=
autodiscovery/</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>The authors of this draft =
should send their IPR statements in response to this email. &nbsp;I hope =
the authors will ihelp their vacationing co-authors to respond by July =
7<sup>th</sup>.&nbsp; <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>The WG should consider the =
following: <o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'color:black'>1)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>Does BGP need to have an autodiscovery mechanism =
for peers within Data Centers? <o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.2in'><span =
style=3D'color:black'>2)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>Does this mechanism work for other deployments? =
<o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.2in'><span =
style=3D'color:black'>3)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>If so, should be passed in BGP Hello =
message?&nbsp; <o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'color:black'>Or should it be a part of another protocol (e.g. =
LLDP, BFD, etc). <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.2in'><span =
style=3D'color:black'>4)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>Does this interact with any of the LSVR work? =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>I want to thank the =
authors for their patience while we sorted through some of the WG LC for =
other drafts.&nbsp; We decided to wait until some of those discussion =
were cleared up prior to starting a new WG Adoption =
call.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>Susan Hares =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black;m=
so-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p></div></div></div>=
</div></body></html>
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Date: Fri, 20 Jul 2018 19:49:31 +0800
From: "=?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?=" <xiaohu.xxh@alibaba-inc.com>
To: "Susan Hares" <shares@ndzh.com>, "Idr" <idr-bounces@ietf.org>, "idr" <idr@ietf.org>
Cc: "draft-xu-idr-neighbor-autodiscovery" <draft-xu-idr-neighbor-autodiscovery@ietf.org>
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From: guntervandeveldecc@icloud.com
To: Susan Hares <shares@ndzh.com>, Idr <idr-bounces@ietf.org>, idr <idr@ietf.org>, =?UTF-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= <xiaohu.xxh@alibaba-inc.com>, lsvr@ietf.org
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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To keep both LSVR and IDR WG in sync , i appreciate to keep LSVR WG in invo=
lved. This will allow better understanding of use-case requirement synergie=
s and will aid the framing of most optimal solution space.




G/




Gunter Van de Velde







From: =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)


Sent: Friday, July 20, 07:51


Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery


To: Susan Hares, Idr, idr


Cc: draft-xu-idr-neighbor-autodiscovery






Hi Sue,




Understood, I will.=C2=A0




By the way, some authors of this draft are exactly from MSDC operators incl=
uding=C2=A0Alibaba, Tencent and LinkedIn.




Best regards,


Xiaohu




------------------------------------------------------------------


From:Susan Hares <shares@ndzh.com>


Send Time:2018=E5=B9=B47=E6=9C=8820=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=94) 1=
9:18


To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-inc.=
com>; Idr <idr-bounces@ietf.org>; idr <idr@ietf.org>


Cc:draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery=
@ietf.org>


Subject:RE: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery




Xiaohu:


=C2=A0


Our next step is to gather requirements for the IDR neighbor discovery from=
 the WG. =C2=A0We would especially be interested in feedback on requirement=
s from operators of data centers.=C2=A0 If you know of an operators of medi=
um data centers who could send requirements to the IDR chairs or the IDR li=
st, it would be helpful.


=C2=A0


Cheerily, Susan Hares=20


=C2=A0


From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of ???(??)


Sent: Friday, July 20, 2018 7:12 AM


To: Idr; idr


Cc: draft-xu-idr-neighbor-autodiscovery


Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery


=C2=A0


=C2=A0


Hi Sue,


=C2=A0


Thanks for launching the WG adoption call for=C2=A0draft-xu-idr-neighbor-au=
todiscovery.


=C2=A0


Hi all,


=C2=A0


There has been one implementation developed by a switch vendor. Furthermore=
 at least two additional implementations from other vendors=C2=A0are under =
construction. If any of you have any concrete and technical=C2=A0concerns o=
n this mechanism, please feel free to=C2=A0tell us and we would like to ver=
ify your=C2=A0concerns on the implementation and then give you feedbacks.


=C2=A0


Best regards,


Xiaohu


------------------------------------------------------------------


From:Susan Hares <shares@ndzh.com>


Send Time:2018=E5=B9=B47=E6=9C=8819=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 1=
7:59


To:idr <idr@ietf.org>


Cc:draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery=
@ietf.org>


Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery


=C2=A0


This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery


(July 2 =E2=80=93 July 16).=20


=C2=A0


The WG chairs conclude on my original questions that:=20


1)=C2=A0 There is WG interest to have an auto-discovery mechanism=20


that will work for BGP peers in Data Centers


=C2=A0


2)=C2=A0 There is some WG =C2=A0interest having this work


in other deployments.=20


=C2=A0


3)=C2=A0 There is no consensus on the mechanisms=20


(BGP hellos or other mechanisms)=20


Or requirements for the mechanisms.=20


=C2=A0


4)=C2=A0 There is WG consensus and AD Consensus that we should=20


collaborate with LSVR. One mechanism for both would=20


be good, but it needs to fit the requirements set


by the WG. =C2=A0


=C2=A0


There is no consensus on adoption this draft.=20


=C2=A0


During today=E2=80=99s IDR session (18:10-19:10), we will have a=20


discussion on the requirements for the auto-discovery mechanisms.=20


We will start by reviewing the LSVR requirement set.


=C2=A0


If our discussions today do not come to a clear conclusion,=20


the chairs are willing to sponsor an interim on the topic.=20


=C2=A0


Susan Hares and John Scudder.=20


=C2=A0


From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares


Sent: Monday, July 2, 2018 1:09 PM


To: idr@ietf.org


Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org


Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery


=C2=A0


Greetings:=20


=C2=A0


This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscove=
ry (July 2 =E2=80=93 July 16).=C2=A0=20


=C2=A0


https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/


=C2=A0


The authors of this draft should send their IPR statements in response to t=
his email. =C2=A0I hope the authors will ihelp their vacationing co-authors=
 to respond by July 7th.=C2=A0=20


=C2=A0


The WG should consider the following:=20


1)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Does BGP need to have an autodiscovery mec=
hanism for peers within Data Centers?=20


2)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Does this mechanism work for other deploym=
ents?=20


=C2=A0


3)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 If so, should be passed in BGP Hello messa=
ge?=C2=A0=20


Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=20


=C2=A0


4)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Does this interact with any of the LSVR wo=
rk?=20


=C2=A0


I want to thank the authors for their patience while we sorted through some=
 of the WG LC for other drafts.=C2=A0 We decided to wait until some of thos=
e discussion were cleared up prior to starting a new WG Adoption call.


=C2=A0


=C2=A0


Susan Hares=20


=C2=A0











------=_Part_5494_927351400.1532088290285
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<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">To keep both LSVR and IDR WG in sync , i appreciate to keep LSVR WG in involved. This will allow better understanding of use-case requirement synergies and will aid the framing of most optimal solution space.<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">G/<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Gunter Van de Velde</div>
<br>
<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">From: &#24464;&#23567;&#34382;(&#20041;&#20808;)<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Sent: Friday, July 20, 07:51<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">To: Susan Hares, Idr, idr<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Cc: draft-xu-idr-neighbor-autodiscovery<br>
<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Hi Sue,<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Understood, I will.&#160;<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">By the way, some authors of this draft are exactly from MSDC operators including&#160;Alibaba, Tencent and LinkedIn.<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Best regards,<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Xiaohu<br>
<br>
</div>
<blockquote type="cite"><div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">------------------------------------------------------------------<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">From:Susan Hares &lt;shares@ndzh.com&gt;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Send Time:2018&#24180;7&#26376;20&#26085;(&#26143;&#26399;&#20116;) 19:18<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">To:&#24464;&#23567;&#34382;(&#20041;&#20808;) &lt;xiaohu.xxh@alibaba-inc.com&gt;; Idr &lt;idr-bounces@ietf.org&gt;; idr &lt;idr@ietf.org&gt;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Cc:draft-xu-idr-neighbor-autodiscovery &lt;draft-xu-idr-neighbor-autodiscovery@ietf.org&gt;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Subject:RE: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Xiaohu:<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Our next step is to gather requirements for the IDR neighbor discovery from the WG. &#160;We would especially be interested in feedback on requirements from operators of data centers.&#160; If you know of an operators of medium data centers who could send requirements to the IDR chairs or the IDR list, it would be helpful.<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Cheerily, Susan Hares <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">From: Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>???(??)<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>Sent:</b> Friday, July 20, 2018 7:12 AM<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>To:</b> Idr; idr<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>Cc:</b> draft-xu-idr-neighbor-autodiscovery<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Hi Sue,<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Thanks for launching the WG adoption call for&#160;draft-xu-idr-neighbor-autodiscovery.<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Hi all,<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">There has been one implementation developed by a switch vendor. Furthermore at least two additional implementations from other vendors&#160;are under construction. If any of you have any concrete and technical&#160;concerns on this mechanism, please feel free to&#160;tell us and we would like to verify your&#160;concerns on the implementation and then give you feedbacks.<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Best regards,<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Xiaohu<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">------------------------------------------------------------------<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">From:Susan Hares &lt;shares@ndzh.com&gt;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Send Time:2018&#24180;7&#26376;19&#26085;(&#26143;&#26399;&#22235;) 17:59<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">To:idr &lt;idr@ietf.org&gt;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Cc:draft-xu-idr-neighbor-autodiscovery &lt;draft-xu-idr-neighbor-autodiscovery@ietf.org&gt;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">(July 2 &#8211; July 16). <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">The WG chairs conclude on my original questions that: <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">1)&#160; There is WG interest to have an auto-discovery mechanism <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">that will work for BGP peers in Data Centers<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">2)&#160; There is some WG &#160;interest having this work<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">in other deployments. <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">3)&#160; There is no consensus on the mechanisms <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">(BGP hellos or other mechanisms) <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Or requirements for the mechanisms. <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">4)&#160; There is WG consensus and AD Consensus that we should <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">collaborate with LSVR. One mechanism for both would <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">be good, but it needs to fit the requirements set<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">by the WG. &#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">There is no consensus on adoption this draft. <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">During today&#8217;s IDR session (18:10-19:10), we will have a <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">discussion on the requirements for the auto-discovery mechanisms. <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">We will start by reviewing the LSVR requirement set.<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">If our discussions today do not come to a clear conclusion, <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">the chairs are willing to sponsor an interim on the topic. <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Susan Hares and John Scudder. <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">From: Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Susan Hares<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>Sent:</b> Monday, July 2, 2018 1:09 PM<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>To:</b> idr@ietf.org<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>Cc:</b> draft-xu-idr-neighbor-autodiscovery@ietf.org<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><b>Subject:</b> [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Greetings: <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscovery (July 2 &#8211; July 16).&#160; <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><a href="https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/</a><br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">The authors of this draft should send their IPR statements in response to this email. &#160;I hope the authors will ihelp their vacationing co-authors to respond by July 7<sup>th</sup>.&#160; <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">The WG should consider the following: <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">1)&#160;&#160;&#160;&#160;&#160; Does BGP need to have an autodiscovery mechanism for peers within Data Centers? <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">2)&#160;&#160;&#160;&#160;&#160; Does this mechanism work for other deployments? <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">3)&#160;&#160;&#160;&#160;&#160; If so, should be passed in BGP Hello message?&#160; <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Or should it be a part of another protocol (e.g. LLDP, BFD, etc). <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">4)&#160;&#160;&#160;&#160;&#160; Does this interact with any of the LSVR work? <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">I want to thank the authors for their patience while we sorted through some of the WG LC for other drafts.&#160; We decided to wait until some of those discussion were cleared up prior to starting a new WG Adoption call.<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Susan Hares <br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">&#160;<br>
</div>
</blockquote>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><br>
<br>
<br>
</div>

------=_Part_5494_927351400.1532088290285--


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Subject: Re: [Idr] [Lsvr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Gunter:=20

=20

Thank you for mention that fact.  I had my second cup of tea and noticed =
I missed requesting it be cross-posted to LSVR WG.=20

=20

Sue=20

=20

From: Lsvr [mailto:lsvr-bounces@ietf.org] On Behalf Of =
guntervandeveldecc=3D40icloud.com@dmarc.ietf.org
Sent: Friday, July 20, 2018 8:05 AM
To: Susan Hares; Idr; idr; =
=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88); lsvr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery
Subject: Re: [Lsvr] [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

To keep both LSVR and IDR WG in sync , i appreciate to keep LSVR WG in =
involved. This will allow better understanding of use-case requirement =
synergies and will aid the framing of most optimal solution space.

G/

Gunter Van de Velde





From: =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)

Sent: Friday, July 20, 07:51

Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

To: Susan Hares, Idr, idr

Cc: draft-xu-idr-neighbor-autodiscovery



Hi Sue,

Understood, I will.=20

By the way, some authors of this draft are exactly from MSDC operators =
including Alibaba, Tencent and LinkedIn.

Best regards,

Xiaohu

------------------------------------------------------------------

From:Susan Hares <shares@ndzh.com>

Send =
Time:2018=E5=B9=B47=E6=9C=8820=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=94) =
19:18

To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) =
<xiaohu.xxh@alibaba-inc.com>; Idr <idr-bounces@ietf.org>; idr =
<idr@ietf.org>

Cc:draft-xu-idr-neighbor-autodiscovery =
<draft-xu-idr-neighbor-autodiscovery@ietf.org>

Subject:RE: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

Xiaohu:

=20

Our next step is to gather requirements for the IDR neighbor discovery =
from the WG.  We would especially be interested in feedback on =
requirements from operators of data centers.  If you know of an =
operators of medium data centers who could send requirements to the IDR =
chairs or the IDR list, it would be helpful.

=20

Cheerily, Susan Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of ???(??)

Sent: Friday, July 20, 2018 7:12 AM

To: Idr; idr

Cc: draft-xu-idr-neighbor-autodiscovery

Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

=20

Hi Sue,

=20

Thanks for launching the WG adoption call for =
draft-xu-idr-neighbor-autodiscovery.

=20

Hi all,

=20

There has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other vendors =
are under construction. If any of you have any concrete and technical =
concerns on this mechanism, please feel free to tell us and we would =
like to verify your concerns on the implementation and then give you =
feedbacks.

=20

Best regards,

Xiaohu

------------------------------------------------------------------

From:Susan Hares <shares@ndzh.com>

Send =
Time:2018=E5=B9=B47=E6=9C=8819=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) =
17:59

To:idr <idr@ietf.org>

Cc:draft-xu-idr-neighbor-autodiscovery =
<draft-xu-idr-neighbor-autodiscovery@ietf.org>

Subject:Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery

(July 2 =E2=80=93 July 16).=20

=20

The WG chairs conclude on my original questions that:=20

1)  There is WG interest to have an auto-discovery mechanism=20

that will work for BGP peers in Data Centers

=20

2)  There is some WG  interest having this work

in other deployments.=20

=20

3)  There is no consensus on the mechanisms=20

(BGP hellos or other mechanisms)=20

Or requirements for the mechanisms.=20

=20

4)  There is WG consensus and AD Consensus that we should=20

collaborate with LSVR. One mechanism for both would=20

be good, but it needs to fit the requirements set

by the WG. =20

=20

There is no consensus on adoption this draft.=20

=20

During today=E2=80=99s IDR session (18:10-19:10), we will have a=20

discussion on the requirements for the auto-discovery mechanisms.=20

We will start by reviewing the LSVR requirement set.

=20

If our discussions today do not come to a clear conclusion,=20

the chairs are willing to sponsor an interim on the topic.=20

=20

Susan Hares and John Scudder.=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares

Sent: Monday, July 2, 2018 1:09 PM

To: idr@ietf.org

Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org

Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery

=20

Greetings:=20

=20

This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16). =20

=20

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

=20

The authors of this draft should send their IPR statements in response =
to this email.  I hope the authors will ihelp their vacationing =
co-authors to respond by July 7th. =20

=20

The WG should consider the following:=20

1)      Does BGP need to have an autodiscovery mechanism for peers =
within Data Centers?=20

2)      Does this mechanism work for other deployments?=20

=20

3)      If so, should be passed in BGP Hello message? =20

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=20

=20

4)      Does this interact with any of the LSVR work?=20

=20

I want to thank the authors for their patience while we sorted through =
some of the WG LC for other drafts.  We decided to wait until some of =
those discussion were cleared up prior to starting a new WG Adoption =
call.

=20

=20

Susan Hares=20

=20






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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Gunter: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you for mention that fact.=C2=A0 I had my second cup of tea and =
noticed I missed requesting it be cross-posted to LSVR WG. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Lsvr [mailto:lsvr-bounces@ietf.org] <b>On Behalf Of =
</b>guntervandeveldecc=3D40icloud.com@dmarc.ietf.org<br><b>Sent:</b> =
Friday, July 20, 2018 8:05 AM<br><b>To:</b> Susan Hares; Idr; idr; =
</span><span style=3D'font-size:10.0pt;font-family:"MS UI =
Gothic","sans-serif"'>=E5=BE=90=E5=B0=8F=E8=99=8E</span><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>(</span><spa=
n =
style=3D'font-size:10.0pt;font-family:SimSun'>=E4=B9=89=E5=85=88</span><s=
pan style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>); =
lsvr@ietf.org<br><b>Cc:</b> =
draft-xu-idr-neighbor-autodiscovery<br><b>Subject:</b> Re: [Lsvr] [Idr] =
WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
o keep both LSVR and IDR WG in sync , i appreciate to keep LSVR WG in =
involved. This will allow better understanding of use-case requirement =
synergies and will aid the framing of most optimal solution =
space.<o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>G=
/<o:p></o:p></span></p></div><div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>G=
unter Van de Velde<o:p></o:p></span></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'><=
br><br><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>F=
rom: </span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E5=BE=90=E5=B0=8F=E8=99=8E</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>(=
</span><span =
style=3D'font-size:11.0pt;font-family:SimSun;color:black'>=E4=B9=89=E5=85=
=88</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>)=
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ent: Friday, July 20, 07:51<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ubject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
o: Susan Hares, Idr, idr<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>C=
c: =
draft-xu-idr-neighbor-autodiscovery<br><br><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>H=
i Sue,<o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>U=
nderstood, I will.&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>B=
y the way, some authors of this draft are exactly from MSDC operators =
including&nbsp;Alibaba, Tencent and =
LinkedIn.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>B=
est regards,<o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>X=
iaohu<o:p></o:p></span></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>-=
-----------------------------------------------------------------<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>F=
rom:Susan Hares =
&lt;shares@ndzh.com&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
end Time:2018</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>7=
</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>2=
0</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>(=
</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E6=98=9F=E6=9C=9F=E4=BA=94</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>)=
 19:18<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
o:</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E5=BE=90=E5=B0=8F=E8=99=8E</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>(=
</span><span =
style=3D'font-size:11.0pt;font-family:SimSun;color:black'>=E4=B9=89=E5=85=
=88</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>)=
 &lt;xiaohu.xxh@alibaba-inc.com&gt;; Idr &lt;idr-bounces@ietf.org&gt;; =
idr &lt;idr@ietf.org&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>C=
c:draft-xu-idr-neighbor-autodiscovery =
&lt;draft-xu-idr-neighbor-autodiscovery@ietf.org&gt;<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ubject:RE: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>X=
iaohu:<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>O=
ur next step is to gather requirements for the IDR neighbor discovery =
from the WG. &nbsp;We would especially be interested in feedback on =
requirements from operators of data centers.&nbsp; If you know of an =
operators of medium data centers who could send requirements to the IDR =
chairs or the IDR list, it would be =
helpful.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>C=
heerily, Susan Hares <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>F=
rom: Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of =
</b>???(??)<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ent:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
Friday, July 20, 2018 7:12 AM<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
o:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
Idr; idr<o:p></o:p></span></p></div><div><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>C=
c:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ubject:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>H=
i Sue,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
hanks for launching the WG adoption call =
for&nbsp;draft-xu-idr-neighbor-autodiscovery.<o:p></o:p></span></p></div>=
<div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>H=
i all,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
here has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other =
vendors&nbsp;are under construction. If any of you have any concrete and =
technical&nbsp;concerns on this mechanism, please feel free to&nbsp;tell =
us and we would like to verify your&nbsp;concerns on the implementation =
and then give you feedbacks.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>B=
est regards,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>X=
iaohu<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>-=
-----------------------------------------------------------------<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>F=
rom:Susan Hares =
&lt;shares@ndzh.com&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
end Time:2018</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>7=
</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>1=
9</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>(=
</span><span style=3D'font-size:11.0pt;font-family:"MS =
Gothic";color:black'>=E6=98=9F=E6=9C=9F=E5=9B=9B</span><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>)=
 17:59<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
o:idr &lt;idr@ietf.org&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>C=
c:draft-xu-idr-neighbor-autodiscovery =
&lt;draft-xu-idr-neighbor-autodiscovery@ietf.org&gt;<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ubject:Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
his closes the 2 week adoption for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>(=
July 2 =E2=80=93 July 16). <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
he WG chairs conclude on my original questions that: =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>1=
)&nbsp; There is WG interest to have an auto-discovery mechanism =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>t=
hat will work for BGP peers in Data =
Centers<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>2=
)&nbsp; There is some WG &nbsp;interest having this =
work<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>i=
n other deployments. <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>3=
)&nbsp; There is no consensus on the mechanisms =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>(=
BGP hellos or other mechanisms) <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>O=
r requirements for the mechanisms. <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>4=
)&nbsp; There is WG consensus and AD Consensus that we should =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>c=
ollaborate with LSVR. One mechanism for both would =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>b=
e good, but it needs to fit the requirements =
set<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>b=
y the WG. &nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
here is no consensus on adoption this draft. =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>D=
uring today=E2=80=99s IDR session (18:10-19:10), we will have a =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>d=
iscussion on the requirements for the auto-discovery mechanisms. =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>W=
e will start by reviewing the LSVR requirement =
set.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>I=
f our discussions today do not come to a clear conclusion, =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>t=
he chairs are willing to sponsor an interim on the topic. =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
usan Hares and John Scudder. <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>F=
rom: Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Susan =
Hares<o:p></o:p></span></p></div><div><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ent:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
Monday, July 2, 2018 1:09 PM<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
o:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
idr@ietf.org<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>C=
c:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
draft-xu-idr-neighbor-autodiscovery@ietf.org<o:p></o:p></span></p></div><=
div><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>S=
ubject:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'> =
[Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>G=
reetings: <o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
his begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16).&nbsp; =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'><=
a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscov=
ery/">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscover=
y/</a><o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
he authors of this draft should send their IPR statements in response to =
this email. &nbsp;I hope the authors will ihelp their vacationing =
co-authors to respond by July 7<sup>th</sup>.&nbsp; =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>T=
he WG should consider the following: <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>1=
)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Does BGP need to have an autodiscovery =
mechanism for peers within Data Centers? =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>2=
)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Does this mechanism work for other =
deployments? <o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>3=
)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If so, should be passed in BGP Hello =
message?&nbsp; <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>O=
r should it be a part of another protocol (e.g. LLDP, BFD, etc). =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>4=
)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Does this interact with any of the LSVR =
work? <o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>I=
 want to thank the authors for their patience while we sorted through =
some of the WG LC for other drafts.&nbsp; We decided to wait until some =
of those discussion were cleared up prior to starting a new WG Adoption =
call.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Arial","sans-serif";color:black'>&=
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Susan Hares <shares@ndzh.com>, "'John Scudder'" <jgs@juniper.net>
CC: "'idr wg'" <idr@ietf.org>, "'Robert Raszuk'" <robert@raszuk.net>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
Thread-Index: AQHUH7co+mrsl73k3Uy/PrxMkuCLEaSXdqtggABYI4D//605EIAAwEaA///ho4A=
Date: Fri, 20 Jul 2018 13:49:55 +0000
Message-ID: <9e8263dc30654287a0875afea50349bb@XCH-ALN-014.cisco.com>
References: <CA+b+ERkbN==4wzL0K4OqunaPyu0Bw6A3dfFUAu5-NLT35vCf6w@mail.gmail.com> <20180719231119.GB10999@pfrc.org> <CA+b+ER=7dU_odxoMYpq-pbKfp=h3xTu1Y9gEKoGy6caJLb19qA@mail.gmail.com> <3a8b0cff4cdf4968b950d5e43810602a@XCH-ALN-014.cisco.com> <ADAC260E-566A-4628-8F4C-C7DE401A5821@juniper.net> <5e8e2b88c99044d8bed2fffa38720532@XCH-ALN-014.cisco.com> <00ac01d42013$f5d7b910$e1872b30$@ndzh.com>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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There's also those that write the code and those that don't.
LSVR is going to be a major multi-man-year project. It's more than "just an=
other address family".
There is a ton of issues that OSPF and ISIS handle differently.
LSVR will handle them differently again and will have more issues to handle=
 differently.
The auto-discovery issue is just the start.
Then, implementation is not just protocol definition.
There's config, oper data, Yang, Test automation and the list goes on

A brand new protocol like LSVR does not compare with an increment to extend=
ed community code.
Variable length communities requires a rewrite.
My proposal is a major reuse of existing code. Much easier.

Regards,
Jakob.

From: Susan Hares <shares@ndzh.com>
Sent: Friday, July 20, 2018 3:25 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>; 'John Scudder' <jgs@juniper.ne=
t>
Cc: 'idr wg' <idr@ietf.org>; 'Robert Raszuk' <robert@raszuk.net>
Subject: RE: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

Jakob:
<individual contributor hat on>

Two groups of people use BGP.  The BGP-LS people who feel adding TLVs and T=
LVs of information is acceptable.
You claim 1 TLVs is "too much" so that we must spin multiple sizes of commu=
nities.
Hmm.

<individual contributor hat still on>

Cheerily, Sue

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 12:05 AM
To: John Scudder
Cc: idr wg; Robert Raszuk
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ....)

The thing is I want to reuse the extended community code as much as possibl=
e.
The routing policy code and its associated configuration, show, xml and deb=
ug commands is the bulk of it.
The more you deviate, the harder it gets.
Variable length is a big deviation.

Regards,
Jakob.

From: John Scudder <jgs@juniper.net<mailto:jgs@juniper.net>>
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com<mailto:jheitz@cisco.com>>
Cc: Robert Raszuk <robert@raszuk.net<mailto:robert@raszuk.net>>; Jeffrey Ha=
as <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>; idr wg <idr@ietf.org<mailto:idr=
@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ....)

(speaking as an individual WG contributor)

I think it is a big mistake to suggest that the reason flexcomms/wide comms=
 hasn't progressed is that it's variable-length. It's much more ambitious t=
han any of the fixed-length stuff we have, that's a reason. It's recursive,=
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.

$0.02,

--John

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <jheitz=3D40cisco.com@dm=
arc.ietf.org<mailto:jheitz=3D40cisco.com@dmarc.ietf.org>> wrote:

Not at all. Experience has shown that fixed works very well.
Large community went from concept to RFC and code complete with all the rou=
ting policy code in 2 years,
because we could reuse the community code.
Variable length communities started in 2002
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00<https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf..org_html_draft-=
2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Sc=
bfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rLbAvAIj9fL=
Y9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc=
&e=3D>
The code will have to be written from scratch.

Regards,
Jakob.

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of =
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>
Cc: idr wg <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ....)


> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the =
proposals being submitted and even presented at IDR. Time to learn from pas=
t mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@=
pfrc.org>> wrote:
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insa=
ne
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">There's also those that write the code and t=
hose that don't.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">LSVR is going to be a major multi-man-year p=
roject. It's more than &quot;just another address family&quot;.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">There is a ton of issues that OSPF and ISIS =
handle differently.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">LSVR will handle them differently again and =
will have more issues to handle differently.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The auto-discovery issue is just the start.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Then, implementation is not just protocol de=
finition.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">There's config, oper data, Yang, Test automa=
tion and the list goes on<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">A brand new protocol like LSVR does not comp=
are with an increment to extended community code.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length communities requires a rewri=
te.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">My proposal is a major reuse of existing cod=
e. Much easier.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares &lt;shares@ndzh.co=
m&gt;
<br>
<b>Sent:</b> Friday, July 20, 2018 3:25 AM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;jheitz@cisco.com&gt;; 'John Scudder' &l=
t;jgs@juniper.net&gt;<br>
<b>Cc:</b> 'idr wg' &lt;idr@ietf.org&gt;; 'Robert Raszuk' &lt;robert@raszuk=
.net&gt;<br>
<b>Subject:</b> RE: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<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:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Jakob:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&lt;individual contributor hat on&gt;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Two groups of people use BGP.&nbsp; T=
he BGP-LS people who feel adding TLVs and TLVs of information is acceptable=
. &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">You claim 1 TLVs is &#8220;too much&#=
8221; so that we must spin multiple sizes of communities.&nbsp;&nbsp; &nbsp=
;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Hmm.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&lt;individual contributor hat still =
on&gt;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Cheerily, Sue
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><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;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounc=
es@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Friday, July 20, 2018 12:05 AM<br>
<b>To:</b> John Scudder<br>
<b>Cc:</b> idr wg; Robert Raszuk<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ....)<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:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The thing is I want to reuse the extended co=
mmunity code as much as possible.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The routing policy code and its associated c=
onfiguration, show, xml and debug commands is the bulk of it.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The more you deviate, the harder it gets.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length is a big deviation.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> John Scudder &lt;<a href=3D"ma=
ilto:jgs@juniper.net">jgs@juniper.net</a>&gt;
<br>
<b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com">jhe=
itz@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net">robert@ra=
szuk.net</a>&gt;; Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@=
pfrc.org</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</=
a>&gt;<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ....)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">(speaking as an individual WG contributor) <o:p></o:=
p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">I think it is a big mistake to suggest that the reas=
on flexcomms/wide comms hasn't progressed is that it's variable-length. It'=
s much more ambitious than any of the fixed-length stuff we have, that's a =
reason. It's recursive, that might
 be a reason too. But just because it's variable-length? Not buying it.<o:p=
></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">$0.02,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">--John<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) &=
lt;<a href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org">jheitz=3D40cisco.=
com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Not at all. Experience has shown that fixed =
works very well.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Large community went from concept to RFC and=
 code complete with all the routing policy code in 2 years,</span><o:p></o:=
p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">because we could reuse the community code.</=
span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length communities started in 2002<=
/span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><a href=3D"https://urldefense.proofpoint.com=
/v2/url?u=3Dhttps-3A__tools.ietf..org_html_draft-2Dlange-2Dflexible-2Dbgp-2=
Dcommunities-2D00&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3vo=
DTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdox=
jfktxXE0SPGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=
=3D"><span style=3D"color:purple">https://tools.ietf.org/html/draft-lange-f=
lexible-bgp-communities-00</span></a></span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The code will have to be written from scratc=
h.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span class=3D"apple-converted-s=
pace"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-=
serif">&nbsp;</span></span><span style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,sans-serif">Idr
 &lt;<a href=3D"mailto:idr-bounces@ietf.org"><span style=3D"color:purple">i=
dr-bounces@ietf.org</span></a>&gt;<span class=3D"apple-converted-space">&nb=
sp;</span><b>On Behalf Of<span class=3D"apple-converted-space">&nbsp;</span=
></b>Robert Raszuk<br>
<b>Sent:</b><span class=3D"apple-converted-space">&nbsp;</span>Thursday, Ju=
ly 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"apple-converted-space">&nbsp;</span>Jeffrey Haas &=
lt;<a href=3D"mailto:jhaas@pfrc.org"><span style=3D"color:purple">jhaas@pfr=
c.org</span></a>&gt;<br>
<b>Cc:</b><span class=3D"apple-converted-space">&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span style=3D"color:purple">idr@ietf.org</spa=
n></a>&gt;<br>
<b>Subject:</b><span class=3D"apple-converted-space">&nbsp;</span>Re: [Idr]=
 Fixed sized communities (was Re: Questions on your presentations ....)</sp=
an><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.5pt;font-family:&quot;Ari=
al&quot;,sans-serif;background:white">&gt; If we must do fixed</span><o:p><=
/o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I do not think we must do fixed. I see no reason to stick with fixed.&=
nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Experience has proven that fixed does not work .. we see this clear in=
 the proposals being submitted and even presented at IDR. Time to learn fro=
m past mistakes.&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<br>
Robert</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a=
 href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><span style=3D"color:purp=
le">jhaas@pfrc.org</span></a>&gt; wrote:<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt;margin-bottom:5..0pt">
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 12:52:44AM &#43;0200, Robert=
 Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org"><span style=3D"color:purple">Idr@ietf.org</=
span></a><br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9v=
dCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62=
w&amp;e=3D" target=3D"_blank"><span style=3D"color:purple">https://www.ietf=
..org/mailman/listinfo/idr</span></a><o:p></o:p></p>
</div>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">_______________________________________________<br=
>
Idr mailing list<br>
</span><a href=3D"mailto:Idr@ietf.org"><span style=3D"font-size:9.0pt;font-=
family:&quot;Helvetica&quot;,sans-serif;color:purple">Idr@ietf.org</span></=
a><span style=3D"font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-ser=
if"><br>
</span><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__ww=
w.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0=
UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAI=
j9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1A=
BXs_A62w&amp;e=3D"><span style=3D"font-size:9.0pt;font-family:&quot;Helveti=
ca&quot;,sans-serif;color:purple">https://urldefense.proofpoint.com/v2/url?=
u=3Dhttps-3A__www.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkY=
uh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;=
m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarM=
DH82yonWcxAhaK1ABXs_A62w&amp;e=3D</span></a><o:p></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</body>
</html>

--_000_9e8263dc30654287a0875afea50349bbXCHALN014ciscocom_--


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From: Robert Raszuk <robert@raszuk.net>
Date: Fri, 20 Jul 2018 15:57:40 +0200
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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: Susan Hares <shares@ndzh.com>, John Scudder <jgs@juniper.net>, idr wg <idr@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/DlhunIQuUsIz9hBLeNY5wzqet3o>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Hi Jakob,

How out of the sudden this thread become LSVR thread ? Sue were merely
pointing out as example BGP-LS TLV based encoding ...

One thing for sure - and you were very honest which is highly appreciated -
with variable length communities some aspects of policy code needs to be
changed. True. And you don't want to do that - also true.

But this is just an opinion in no way I presume stopping IDR to standardize
good thing only due to potential issues with adjusting one BGP
implementation to accommodate it.

Thx,
R.


On Fri, Jul 20, 2018 at 3:49 PM, Jakob Heitz (jheitz) <jheitz@cisco.com>
wrote:

> There's also those that write the code and those that don't.
>
> LSVR is going to be a major multi-man-year project. It's more than "just
> another address family".
>
> There is a ton of issues that OSPF and ISIS handle differently.
>
> LSVR will handle them differently again and will have more issues to
> handle differently.
>
> The auto-discovery issue is just the start.
>
> Then, implementation is not just protocol definition.
>
> There's config, oper data, Yang, Test automation and the list goes on
>
>
>
> A brand new protocol like LSVR does not compare with an increment to
> extended community code.
>
> Variable length communities requires a rewrite.
>
> My proposal is a major reuse of existing code. Much easier.
>
>
>
> Regards,
>
> Jakob.
>
>
>
> *From:* Susan Hares <shares@ndzh.com>
> *Sent:* Friday, July 20, 2018 3:25 AM
> *To:* Jakob Heitz (jheitz) <jheitz@cisco.com>; 'John Scudder' <
> jgs@juniper.net>
> *Cc:* 'idr wg' <idr@ietf.org>; 'Robert Raszuk' <robert@raszuk.net>
> *Subject:* RE: [Idr] Fixed sized communities (was Re: Questions on your
> presentations ...)
>
>
>
> Jakob:
>
> <individual contributor hat on>
>
>
>
> Two groups of people use BGP.  The BGP-LS people who feel adding TLVs and
> TLVs of information is acceptable.
>
> You claim 1 TLVs is =E2=80=9Ctoo much=E2=80=9D so that we must spin multi=
ple sizes of
> communities.
>
> Hmm.
>
>
>
> <individual contributor hat still on>
>
>
>
> Cheerily, Sue
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Jakob Heitz (jheitz)
> *Sent:* Friday, July 20, 2018 12:05 AM
> *To:* John Scudder
> *Cc:* idr wg; Robert Raszuk
> *Subject:* Re: [Idr] Fixed sized communities (was Re: Questions on your
> presentations ....)
>
>
>
> The thing is I want to reuse the extended community code as much as
> possible.
>
> The routing policy code and its associated configuration, show, xml and
> debug commands is the bulk of it.
>
> The more you deviate, the harder it gets.
>
> Variable length is a big deviation.
>
>
>
> Regards,
>
> Jakob.
>
>
>
> *From:* John Scudder <jgs@juniper.net>
> *Sent:* Thursday, July 19, 2018 8:53 PM
> *To:* Jakob Heitz (jheitz) <jheitz@cisco.com>
> *Cc:* Robert Raszuk <robert@raszuk.net>; Jeffrey Haas <jhaas@pfrc.org>;
> idr wg <idr@ietf.org>
> *Subject:* Re: [Idr] Fixed sized communities (was Re: Questions on your
> presentations ....)
>
>
>
> (speaking as an individual WG contributor)
>
>
>
> I think it is a big mistake to suggest that the reason flexcomms/wide
> comms hasn't progressed is that it's variable-length. It's much more
> ambitious than any of the fixed-length stuff we have, that's a reason. It=
's
> recursive, that might be a reason too. But just because it's
> variable-length? Not buying it.
>
>
>
> $0.02,
>
>
>
> --John
>
>
>
> On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <
> jheitz=3D40cisco.com@dmarc.ietf.org> wrote:
>
>
>
> Not at all. Experience has shown that fixed works very well.
>
> Large community went from concept to RFC and code complete with all the
> routing policy code in 2 years,
>
> because we could reuse the community code.
>
> Variable length communities started in 2002
>
> https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf..org_h=
tml_draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh=
63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6r=
LbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuP=
z4ecF7I8Wc&e=3D>
>
> The code will have to be written from scratch.
>
>
>
> Regards,
>
> Jakob.
>
>
>
> *From:* Idr <idr-bounces@ietf.org> *On Behalf Of *Robert Raszuk
> *Sent:* Thursday, July 19, 2018 4:21 PM
> *To:* Jeffrey Haas <jhaas@pfrc.org>
> *Cc:* idr wg <idr@ietf.org>
> *Subject:* Re: [Idr] Fixed sized communities (was Re: Questions on your
> presentations ....)
>
>
>
>
>
> > If we must do fixed
>
>
>
> I do not think we must do fixed. I see no reason to stick with fixed.
>
>
>
> Experience has proven that fixed does not work .. we see this clear in th=
e
> proposals being submitted and even presented at IDR. Time to learn from
> past mistakes.
>
>
>
> Thx,
> Robert
>
>
>
>
>
> On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:
>
> On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> > 4. New additional RTC SAFI for 30 octets XXXL ext communities is ...
> insane
> > - not only obvious but then you would need to get complex dealing with
> > different/opposite filtering results from different RTCs SAFIs.
>
> I would like to offer a very specific reductio ad absurdum:
> I propose that the next version of communities we do, if they must be fix=
ed
> length, must be 253 octets of value and 255 bytes of total size.
>
> If we must do fixed, do it and be done for a long while.
>
> -- Jeff
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
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>
>
> _______________________________________________
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>

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Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Jakob,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">How out of the sudden this thread become LSVR threa=
d ? Sue were merely pointing out as example BGP-LS TLV based encoding ...=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">One thing for s=
ure - and you were very honest which is highly appreciated - with variable =
length communities some aspects of policy code needs to be changed. True. A=
nd you don&#39;t want to do that - also true.=C2=A0</div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">But this is just an opinion in no way I presu=
me stopping IDR to standardize good thing only due to potential issues with=
 adjusting one BGP implementation to accommodate it.=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Thx,</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div></div><div class=3D"gmail_extra"><br><div clas=
s=3D"gmail_quote">On Fri, Jul 20, 2018 at 3:49 PM, Jakob Heitz (jheitz) <sp=
an dir=3D"ltr">&lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jh=
eitz@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-6373875971214099491WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">There&#39;s also those that write the code a=
nd those that don&#39;t.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">LSVR is going to be a major multi-man-year p=
roject. It&#39;s more than &quot;just another address family&quot;.<u></u><=
u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">There is a ton of issues that OSPF and ISIS =
handle differently.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">LSVR will handle them differently again and =
will have more issues to handle differently.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">The auto-discovery issue is just the start.<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Then, implementation is not just protocol de=
finition.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">There&#39;s config, oper data, Yang, Test au=
tomation and the list goes on<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">A brand new protocol like LSVR does not comp=
are with an increment to extended community code.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Variable length communities requires a rewri=
te.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">My proposal is a major reuse of existing cod=
e. Much easier.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Regards,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Jakob.<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares &lt;<a href=3D"mai=
lto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt;
<br>
<b>Sent:</b> Friday, July 20, 2018 3:25 AM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" tar=
get=3D"_blank">jheitz@cisco.com</a>&gt;; &#39;John Scudder&#39; &lt;<a href=
=3D"mailto:jgs@juniper.net" target=3D"_blank">jgs@juniper.net</a>&gt;<br>
<b>Cc:</b> &#39;idr wg&#39; &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_=
blank">idr@ietf.org</a>&gt;; &#39;Robert Raszuk&#39; &lt;<a href=3D"mailto:=
robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;<br>
<b>Subject:</b> RE: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<u></u><u></u></span></p>
</div>
</div><span class=3D"">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Jakob:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">&lt;individual contributor hat on&gt;
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Two groups of people use BGP.=C2=A0 T=
he BGP-LS people who feel adding TLVs and TLVs of information is acceptable=
. =C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">You claim 1 TLVs is =E2=80=9Ctoo much=
=E2=80=9D so that we must spin multiple sizes of communities.=C2=A0=C2=A0 =
=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Hmm.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">&lt;individual contributor hat still =
on&gt;
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Cheerily, Sue
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
</span><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;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounc=
es@ietf.org" target=3D"_blank">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<span class=3D""><br>
<b>Sent:</b> Friday, July 20, 2018 12:05 AM<br>
<b>To:</b> John Scudder<br>
<b>Cc:</b> idr wg; Robert Raszuk<br>
</span><b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions=
 on your presentations ....)<u></u><u></u></span></p>
</div>
</div><span class=3D"">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">The thing is I want to reuse the extended co=
mmunity code as much as possible.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">The routing policy code and its associated c=
onfiguration, show, xml and debug commands is the bulk of it.<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">The more you deviate, the harder it gets.<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Variable length is a big deviation.<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Regards,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Jakob.<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
</span><div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> John Scudder &lt;<a href=3D"ma=
ilto:jgs@juniper.net" target=3D"_blank">jgs@juniper.net</a>&gt;
<br><span class=3D"">
<b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" tar=
get=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;; Jeffrey Haas &lt;<a href=3D"mailto:jhaa=
s@pfrc.org" target=3D"_blank">jhaas@pfrc.org</a>&gt;; idr wg &lt;<a href=3D=
"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;<br>
</span><b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions=
 on your presentations ....)<u></u><u></u></span></p>
</div>
</div><span class=3D"">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">(speaking as an individual WG contributor) <u></u><u=
></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I think it is a big mistake to suggest that the reas=
on flexcomms/wide comms hasn&#39;t progressed is that it&#39;s variable-len=
gth. It&#39;s much more ambitious than any of the fixed-length stuff we hav=
e, that&#39;s a reason. It&#39;s recursive, that might
 be a reason too. But just because it&#39;s variable-length? Not buying it.=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">$0.02,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">--John<u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt"><span class=3D""=
>
<div>
<p class=3D"MsoNormal">On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) &=
lt;<a href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org" target=3D"_blank"=
>jheitz=3D40cisco.com@dmarc.<wbr>ietf.org</a>&gt; wrote:<u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><div><span class=3D"">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Not at all. Experience has shown that fixed =
works very well.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Large community went from concept to RFC and=
 code complete with all the routing policy code in 2 years,</span><u></u><u=
></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">because we could reuse the community code.</=
span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Variable length communities started in 2002<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><a href=3D"https://urldefense.proofpoint.com=
/v2/url?u=3Dhttps-3A__tools.ietf..org_html_draft-2Dlange-2Dflexible-2Dbgp-2=
Dcommunities-2D00&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3vo=
DTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdox=
jfktxXE0SPGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=
=3D" target=3D"_blank"><span style=3D"color:purple">https://tools.ietf.org/=
html/<wbr>draft-lange-flexible-bgp-<wbr>communities-00</span></a></span><u>=
</u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">The code will have to be written from scratc=
h.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Regards,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Jakob.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">=C2=A0</span><u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span class=3D"m_-63738759712140=
99491apple-converted-space"><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif">=C2=A0</span></span><span style=3D"font-size:1=
1.0pt;font-family:&quot;Calibri&quot;,sans-serif">Idr
 &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank"><span style=
=3D"color:purple">idr-bounces@ietf.org</span></a>&gt;<span class=3D"m_-6373=
875971214099491apple-converted-space">=C2=A0</span><b>On Behalf Of<span cla=
ss=3D"m_-6373875971214099491apple-converted-space">=C2=A0</span></b>Robert =
Raszuk<span class=3D""><br>
<b>Sent:</b><span class=3D"m_-6373875971214099491apple-converted-space">=C2=
=A0</span>Thursday, July 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"m_-6373875971214099491apple-converted-space">=C2=
=A0</span>Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org" target=3D"_bla=
nk"><span style=3D"color:purple">jhaas@pfrc.org</span></a>&gt;<br>
<b>Cc:</b><span class=3D"m_-6373875971214099491apple-converted-space">=C2=
=A0</span>idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank"><spa=
n style=3D"color:purple">idr@ietf.org</span></a>&gt;<br>
</span><b>Subject:</b><span class=3D"m_-6373875971214099491apple-converted-=
space">=C2=A0</span>Re: [Idr] Fixed sized communities (was Re: Questions on=
 your presentations ....)</span><u></u><u></u></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.5pt;font-family:&quot;Ari=
al&quot;,sans-serif;background:white">&gt; If we must do fixed</span><u></u=
><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I do not think we must do fixed. I see no reason to stick with fixed.=
=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Experience has proven that fixed does not work .. we see this clear in=
 the proposals being submitted and even presented at IDR. Time to learn fro=
m past mistakes.=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<br>
Robert</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a=
 href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><span style=3D"color:purp=
le">jhaas@pfrc.org</span></a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote>
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Ras=
zuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank"><span style=3D"color:purp=
le">Idr@ietf.org</span></a><br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9v=
dCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62=
w&amp;e=3D" target=3D"_blank"><span style=3D"color:purple">https://www.ietf=
..org/mailman/<wbr>listinfo/idr</span></a><u></u><u></u></p>
</div>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">______________________________<wbr>_______________=
__<br>
Idr mailing list<br>
</span><a href=3D"mailto:Idr@ietf.org" target=3D"_blank"><span style=3D"fon=
t-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif;color:purple">Idr=
@ietf.org</span></a><span style=3D"font-size:9.0pt;font-family:&quot;Helvet=
ica&quot;,sans-serif"><br>
</span><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__ww=
w.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0=
UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAI=
j9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1A=
BXs_A62w&amp;e=3D" target=3D"_blank"><span style=3D"font-size:9.0pt;font-fa=
mily:&quot;Helvetica&quot;,sans-serif;color:purple">https://urldefense.proo=
fpoint.<wbr>com/v2/url?u=3Dhttps-3A__www.<wbr>ietf.org_mailman_listinfo_idr=
&amp;<wbr>d=3DDwICAg&amp;c=3D<wbr>HAkYuh63rsuhr6Scbfh0UjBXeMK-<wbr>ndb3voDT=
XcWzoCI&amp;r=3D<wbr>hLt5iDJpw7ukqICc0hoT7A&amp;m=3D<wbr>2hIY6rLbAvAIj9fLY9=
vdCZMdoxjfkt<wbr>xXE0SPGa4SW9Y&amp;s=3D<wbr>ANHXDEVazzM11nlzarMDH82yonWcxA<=
wbr>haK1ABXs_A62w&amp;e=3D</span></a><u></u><u></u></p>
</span></div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>

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

--000000000000e81f4c05716ead19--


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From: Gaurav Dawra <gdawra.ietf@gmail.com>
X-Mailer: iPhone Mail (15F79)
In-Reply-To: <374fc1c8-27b4-44e0-b0e9-a40cab5584ad.xiaohu.xxh@alibaba-inc.com>
Date: Fri, 20 Jul 2018 10:03:19 -0400
Cc: Susan Hares <shares@ndzh.com>, Idr <idr-bounces@ietf.org>, idr <idr@ietf.org>, draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>
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References: <013701d41227$579d2d10$06d78730$@ndzh.com> <001201d41f44$b65ef2a0$231cd7e0$@ndzh.com> <af70397b-e69d-4054-a09f-64028078f9a1.xiaohu.xxh@alibaba-inc.com> <001801d4201b$50989610$f1c9c230$@ndzh.com> <374fc1c8-27b4-44e0-b0e9-a40cab5584ad.xiaohu.xxh@alibaba-inc.com>
To: =?utf-8?B?IuW+kOWwj+iZjijkuYnlhYgpIg==?= <xiaohu.xxh@alibaba-inc.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/cQKi-7JxSq7vGz3YXSfoM-Om_cw>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Hi Sue,

As I have shared earlier during adoption call. I have specific concerns on t=
his document which we have shared with the authors on thread and offline. Th=
ere are no authors currently from LinkedIn.

We will continue to provide input once those concerns have been addressed.

Cheers,

Gaurav

Sent from my iPhone

> On Jul 20, 2018, at 7:49 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88=
) <xiaohu.xxh@alibaba-inc.com> wrote:
>=20
> Hi Sue,
>=20
> Understood, I will.=20
>=20
> By the way, some authors of this draft are exactly from MSDC operators inc=
luding Alibaba, Tencent and LinkedIn.
>=20
> Best regards,
> Xiaohu
>=20
> ------------------------------------------------------------------
> From:Susan Hares <shares@ndzh.com>
> Send Time:2018=E5=B9=B47=E6=9C=8820=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=94) 1=
9:18
> To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) <xiaohu.xxh@alibaba-inc=
.com>; Idr <idr-bounces@ietf.org>; idr <idr@ietf.org>
> Cc:draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscover=
y@ietf.org>
> Subject:RE: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery=

>=20
> Xiaohu:
> =20
> Our next step is to gather requirements for the IDR neighbor discovery fro=
m the WG.  We would especially be interested in feedback on requirements fro=
m operators of data centers.  If you know of an operators of medium data cen=
ters who could send requirements to the IDR chairs or the IDR list, it would=
 be helpful.
> =20
> Cheerily, Susan Hares
> =20
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of ???(??)
> Sent: Friday, July 20, 2018 7:12 AM
> To: Idr; idr
> Cc: draft-xu-idr-neighbor-autodiscovery
> Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
> =20
> =20
> Hi Sue,
> =20
> Thanks for launching the WG adoption call for draft-xu-idr-neighbor-autodi=
scovery.
> =20
> Hi all,
> =20
> There has been one implementation developed by a switch vendor. Furthermor=
e at least two additional implementations from other vendors are under const=
ruction. If any of you have any concrete and technical concerns on this mech=
anism, please feel free to tell us and we would like to verify your concerns=
 on the implementation and then give you feedbacks.
> =20
> Best regards,
> Xiaohu
> ------------------------------------------------------------------
> From:Susan Hares <shares@ndzh.com>
> Send Time:2018=E5=B9=B47=E6=9C=8819=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 1=
7:59
> To:idr <idr@ietf.org>
> Cc:draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscover=
y@ietf.org>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery=

> =20
> This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery
> (July 2 =E2=80=93 July 16).
> =20
> The WG chairs conclude on my original questions that:
> 1)  There is WG interest to have an auto-discovery mechanism
> that will work for BGP peers in Data Centers
> =20
> 2)  There is some WG  interest having this work
> in other deployments.
> =20
> 3)  There is no consensus on the mechanisms
> (BGP hellos or other mechanisms)
> Or requirements for the mechanisms.
> =20
> 4)  There is WG consensus and AD Consensus that we should
> collaborate with LSVR. One mechanism for both would
> be good, but it needs to fit the requirements set
> by the WG. =20
> =20
> There is no consensus on adoption this draft.
> =20
> During today=E2=80=99s IDR session (18:10-19:10), we will have a
> discussion on the requirements for the auto-discovery mechanisms.
> We will start by reviewing the LSVR requirement set.
> =20
> If our discussions today do not come to a clear conclusion,
> the chairs are willing to sponsor an interim on the topic.
> =20
> Susan Hares and John Scudder.
> =20
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
> Sent: Monday, July 2, 2018 1:09 PM
> To: idr@ietf.org
> Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org
> Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
> =20
> Greetings:
> =20
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscov=
ery (July 2 =E2=80=93 July 16).=20
> =20
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
> =20
> The authors of this draft should send their IPR statements in response to t=
his email.  I hope the authors will ihelp their vacationing co-authors to re=
spond by July 7th.=20
> =20
> The WG should consider the following:
> 1)      Does BGP need to have an autodiscovery mechanism for peers within D=
ata Centers?
> 2)      Does this mechanism work for other deployments?
> =20
> 3)      If so, should be passed in BGP Hello message?=20
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
> =20
> 4)      Does this interact with any of the LSVR work?
> =20
> I want to thank the authors for their patience while we sorted through som=
e of the WG LC for other drafts.  We decided to wait until some of those dis=
cussion were cleared up prior to starting a new WG Adoption call.
> =20
> =20
> Susan Hares
> =20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr

--Apple-Mail-64736806-F413-483B-BF8B-8A5D736B0ED3
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div><span></span></div><div><meta http-equ=
iv=3D"content-type" content=3D"text/html; charset=3Dutf-8"><div><span></span=
></div><div><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"><div><span></span></div><div><div><span></span></div><div>Hi Sue,<div=
><br></div><div>As I have shared earlier during adoption call. I have specif=
ic concerns on this document which we have shared with the authors on thread=
 and offline. There are no authors currently from LinkedIn.</div><div><br></=
div><div>We will continue to provide input once those concerns have been add=
ressed.</div><div><br></div><div>Cheers,</div><div><br></div><div>Gaurav<br>=
<br><div id=3D"AppleMailSignature">Sent from my iPhone</div><div><br>On Jul 2=
0, 2018, at 7:49 AM, =E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &lt;<a h=
ref=3D"mailto:xiaohu.xxh@alibaba-inc.com">xiaohu.xxh@alibaba-inc.com</a>&gt;=
 wrote:<br><br></div><blockquote type=3D"cite"><div><div class=3D"__aliyun_e=
mail_body_block"><div style=3D"line-height:1.7;font-family:Tahoma,Arial,STHe=
iti,SimSun;font-size:14.0px;color:#000000;"><div style=3D"clear:both;">Hi Su=
e,</div><div style=3D"clear:both;"><br></div><div style=3D"clear:both;">Unde=
rstood, I will.&nbsp;</div><div style=3D"clear:both;"><br></div><div style=3D=
"clear:both;">By the way, some authors of this draft are exactly from MSDC o=
perators including&nbsp;Alibaba, Tencent and LinkedIn.</div><div style=3D"cl=
ear:both;"><br></div><div style=3D"clear:both;">Best regards,</div><div styl=
e=3D"clear:both;">Xiaohu</div><div class=3D"clear: both"><br></div><blockquo=
te style=3D"margin-right:0;margin-top:0;margin-bottom:0;font-family:Tahoma,A=
rial,STHeiti,SimSun;font-size:14.0px;color:#000000;"><div class=3D"clear: bo=
th">------------------------------------------------------------------</div>=
<div class=3D"clear: both">From:Susan Hares &lt;<a href=3D"mailto:shares@ndz=
h.com">shares@ndzh.com</a>&gt;</div><div class=3D"clear: both">Send Time:201=
8=E5=B9=B47=E6=9C=8820=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=94) 19:18</div><div=
 class=3D"clear: both">To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) &l=
t;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com">xiaohu.xxh@alibaba-inc.com</=
a>&gt;; Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org">idr-bounces@ietf.org=
</a>&gt;; idr &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt;</div>=
<div class=3D"clear: both">Cc:draft-xu-idr-neighbor-autodiscovery &lt;<a hre=
f=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-idr-neigh=
bor-autodiscovery@ietf.org</a>&gt;</div><div class=3D"clear: both">Subject:R=
E: [Idr]  WG adoption call for draft-xu-idr-neighbor-autodiscovery</div><div=
 class=3D"clear: both"><br></div><style>!--  @font-face{font-family:MS Gothi=
c;panose-1:2 11 6 9 7 2 5 8 2 4;}{font-family:Cambria Math;panose-1:2 4 5 3 5=
 4 6 3 2 4;}{font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}{font-family=
:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;}{font-family:\@MS Gothic;panose-1:2 1=
1 6 9 7 2 5 8 2 4;}p.MsoNormal, li.MsoNormal, div.MsoNormal{margin:.0in;marg=
in-bottom:.0pt;font-size:11.0pt;font-family:Calibri,sans-serif;mso-fareast-l=
anguage:ZH-CN;}a:link, span.MsoHyperlink{mso-style-priority:99;color:blue;te=
xt-decoration:underline;}a:visited, span.MsoHyperlinkFollowed{mso-style-prio=
rity:99;color:purple;text-decoration:underline;}p.MsoListParagraph, li.MsoLi=
stParagraph, div.MsoListParagraph{mso-style-priority:34;margin-top:.0in;marg=
in-right:.0in;margin-bottom:.0in;margin-left:.5in;margin-bottom:.0pt;font-si=
ze:11.0pt;font-family:Calibri,sans-serif;mso-fareast-language:ZH-CN;}span.Em=
ailStyle18{mso-style-type:personal;font-family:Calibri,sans-serif;color:wind=
owtext;}span.EmailStyle19{mso-style-type:personal;font-family:Calibri,sans-s=
erif;color:#1f497d;}span.EmailStyle20{mso-style-type:personal-reply;font-fam=
ily:Calibri,sans-serif;color:#1f497d;}.MsoChpDefault{mso-style-type:export-o=
nly;font-family:Calibri,sans-serif;}@page WordSection1{size:8.5in 11.0in;mar=
gin:1.0in 1.0in 1.0in 1.0in;}div.WordSection1{page:WordSection1;}--></style>=
<div class=3D"WordSection1"><p class=3D"MsoNormal"><span style=3D"color:#1f4=
97d;">Xiaohu:</span></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d;=
">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d;">Our=
 next step is to gather requirements for the IDR neighbor discovery from the=
 WG. &nbsp;We would especially be interested in feedback on requirements fro=
m operators of data centers.&nbsp; If you know of an operators of medium dat=
a centers who could send requirements to the IDR chairs or the IDR list, it w=
ould be helpful.</span></p><p class=3D"MsoNormal"><span style=3D"color:#1f49=
7d;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d;">=
Cheerily, Susan Hares </span></p><p class=3D"MsoNormal"><span style=3D"color=
:#1f497d;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"font-weigh=
t:bold;font-size:13.0px;font-family:Tahoma,sans-serif;">From:</span><span st=
yle=3D"font-size:13.0px;font-family:Tahoma,sans-serif;"> Idr [<a href=3D"mai=
lto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>] <b>On Behalf Of <=
/b>???(??)<br><b>Sent:</b> Friday, July 20, 2018 7:12 AM<br><b>To:</b> Idr; i=
dr<br><b>Cc:</b> draft-xu-idr-neighbor-autodiscovery<br><b>Subject:</b> Re: [=
Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery</span></p><p c=
lass=3D"MsoNormal">&nbsp;</p><div><div><p class=3D"MsoNormal"><span style=3D=
"font-size:14.0px;font-family:Tahoma,sans-serif;color:black;">&nbsp;</span><=
/p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:14.0px;font-fa=
mily:Tahoma,sans-serif;color:black;">Hi Sue,</span></p></div><div><p class=3D=
"MsoNormal"><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;co=
lor:black;">&nbsp;</span></p></div><div><p class=3D"MsoNormal"><span style=3D=
"font-size:14.0px;font-family:Tahoma,sans-serif;color:black;">Thanks for lau=
nching the WG adoption call for&nbsp;<span style=3D"background-color:white;"=
>draft-xu-idr-neighbor-autodiscovery.</span></span></p></div><div><p class=3D=
"MsoNormal"><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;co=
lor:black;">&nbsp;</span></p></div><div><p class=3D"MsoNormal"><span style=3D=
"font-size:14.0px;font-family:Tahoma,sans-serif;color:black;">Hi all,</span>=
</p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:14.0px;font-f=
amily:Tahoma,sans-serif;color:black;">&nbsp;</span></p></div><div><p class=3D=
"MsoNormal"><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;co=
lor:black;">There has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other vendors&nbsp;=
are under construction. If any of you have any concrete and technical&nbsp;c=
oncerns on this mechanism, please feel free to&nbsp;tell us and we would lik=
e to verify your&nbsp;concerns on the implementation and then give you feedb=
acks.</span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:1=
4.0px;font-family:Tahoma,sans-serif;color:black;">&nbsp;</span></p></div><di=
v><p class=3D"MsoNormal"><span style=3D"font-size:14.0px;font-family:Tahoma,=
sans-serif;color:black;">Best regards,</span></p></div><div><p class=3D"MsoN=
ormal"><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;color:b=
lack;">Xiaohu</span></p><div><p class=3D"MsoNormal"><span style=3D"font-size=
:14.0px;font-family:Tahoma,sans-serif;color:black;">------------------------=
------------------------------------------</span></p></div><div><p class=3D"=
MsoNormal"><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;col=
or:black;">From:Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@nd=
zh.com</a>&gt;</span></p></div><div><p class=3D"MsoNormal"><span style=3D"fo=
nt-size:14.0px;font-family:Tahoma,sans-serif;color:black;">Send Time:2018</s=
pan><span style=3D"font-size:14.0px;font-family:MS Gothic;color:black;">=E5=B9=
=B4</span><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;colo=
r:black;">7</span><span style=3D"font-size:14.0px;font-family:MS Gothic;colo=
r:black;">=E6=9C=88</span><span style=3D"font-size:14.0px;font-family:Tahoma=
,sans-serif;color:black;">19</span><span style=3D"font-size:14.0px;font-fami=
ly:MS Gothic;color:black;">=E6=97=A5</span><span style=3D"font-size:14.0px;f=
ont-family:Tahoma,sans-serif;color:black;">(</span><span style=3D"font-size:=
14.0px;font-family:MS Gothic;color:black;">=E6=98=9F=E6=9C=9F=E5=9B=9B</span=
><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;color:black;"=
>) 17:59</span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-siz=
e:14.0px;font-family:Tahoma,sans-serif;color:black;">To:idr &lt;<a href=3D"m=
ailto:idr@ietf.org">idr@ietf.org</a>&gt;</span></p></div><div><p class=3D"Ms=
oNormal"><span style=3D"font-size:14.0px;font-family:Tahoma,sans-serif;color=
:black;">Cc:draft-xu-idr-neighbor-autodiscovery &lt;<a href=3D"mailto:draft-=
xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-idr-neighbor-autodiscovery@=
ietf.org</a>&gt;</span></p></div><div><p class=3D"MsoNormal"><span style=3D"=
font-size:14.0px;font-family:Tahoma,sans-serif;color:black;">Subject:Re: [Id=
r] WG adoption call for draft-xu-idr-neighbor-autodiscovery</span></p></div>=
<div><p class=3D"MsoNormal"><span style=3D"font-size:14.0px;font-family:Taho=
ma,sans-serif;color:black;">&nbsp;</span></p></div><p class=3D"MsoNormal"><s=
pan style=3D"font-family:Courier New;color:#1f497d;">This closes the 2 week a=
doption for draft-xu-idr-neighbor-autodiscovery</span></p><p class=3D"MsoNor=
mal"><span style=3D"font-family:Courier New;color:#1f497d;">(July 2 =E2=80=93=
 July 16). </span></p><p class=3D"MsoNormal"><span style=3D"font-family:Cour=
ier New;color:#1f497d;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D=
"font-family:Courier New;color:#1f497d;">The WG chairs conclude on my origin=
al questions that: </span></p><p class=3D"MsoListParagraph" style=3D"text-in=
dent:-.2in;"><span style=3D"font-family:Courier New;color:#1f497d;">1)</span=
><span style=3D"font-size:9.0px;font-family:Times New Roman,serif;color:#1f4=
97d;">&nbsp; </span><span style=3D"font-family:Courier New;color:#1f497d;">T=
here is WG interest to have an auto-discovery mechanism </span></p><p class=3D=
"MsoListParagraph"><span style=3D"font-family:Courier New;color:#1f497d;">th=
at will work for BGP peers in Data Centers</span></p><p class=3D"MsoListPara=
graph"><span style=3D"font-family:Courier New;color:#1f497d;">&nbsp;</span><=
/p><p class=3D"MsoListParagraph" style=3D"text-indent:-.2in;"><span style=3D=
"font-family:Courier New;color:#1f497d;">2)</span><span style=3D"font-size:9=
.0px;font-family:Times New Roman,serif;color:#1f497d;">&nbsp; </span><span s=
tyle=3D"font-family:Courier New;color:#1f497d;">There is some WG &nbsp;inter=
est having this work</span></p><p class=3D"MsoListParagraph"><span style=3D"=
font-family:Courier New;color:#1f497d;">in other deployments. </span></p><p c=
lass=3D"MsoListParagraph"><span style=3D"font-family:Courier New;color:#1f49=
7d;">&nbsp;</span></p><p class=3D"MsoListParagraph" style=3D"text-indent:-.2=
in;"><span style=3D"font-family:Courier New;color:#1f497d;">3)</span><span s=
tyle=3D"font-size:9.0px;font-family:Times New Roman,serif;color:#1f497d;">&n=
bsp; </span><span style=3D"font-family:Courier New;color:#1f497d;">There is n=
o consensus on the mechanisms </span></p><p class=3D"MsoListParagraph"><span=
 style=3D"font-family:Courier New;color:#1f497d;">(BGP hellos or other mecha=
nisms) </span></p><p class=3D"MsoListParagraph"><span style=3D"font-family:C=
ourier New;color:#1f497d;">Or requirements for the mechanisms. </span></p><p=
 class=3D"MsoNormal"><span style=3D"font-family:Courier New;color:#1f497d;">=
&nbsp;</span></p><p class=3D"MsoListParagraph" style=3D"text-indent:-.2in;">=
<span style=3D"font-family:Courier New;color:#1f497d;">4)</span><span style=3D=
"font-size:9.0px;font-family:Times New Roman,serif;color:#1f497d;">&nbsp; </=
span><span style=3D"font-family:Courier New;color:#1f497d;">There is WG cons=
ensus and AD Consensus that we should </span></p><p class=3D"MsoListParagrap=
h"><span style=3D"font-family:Courier New;color:#1f497d;">collaborate with L=
SVR. One mechanism for both would </span></p><p class=3D"MsoListParagraph"><=
span style=3D"font-family:Courier New;color:#1f497d;">be good, but it needs t=
o fit the requirements set</span></p><p class=3D"MsoListParagraph"><span sty=
le=3D"font-family:Courier New;color:#1f497d;">by the WG. &nbsp;</span></p><p=
 class=3D"MsoNormal"><span style=3D"font-family:Courier New;color:#1f497d;">=
&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"font-family:Courier N=
ew;color:#1f497d;">There is no consensus on adoption this draft. </span></p>=
<p class=3D"MsoNormal"><span style=3D"font-family:Courier New;color:#1f497d;=
">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"font-family:Courier=
 New;color:#1f497d;">During today=E2=80=99s IDR session (18:10-19:10), we wi=
ll have a </span></p><p class=3D"MsoNormal"><span style=3D"font-family:Couri=
er New;color:#1f497d;">discussion on the requirements for the auto-discovery=
 mechanisms. </span></p><p class=3D"MsoNormal"><span style=3D"font-family:Co=
urier New;color:#1f497d;">We will start by reviewing the LSVR requirement se=
t.</span></p><p class=3D"MsoNormal"><span style=3D"font-family:Courier New;c=
olor:#1f497d;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"font-f=
amily:Courier New;color:#1f497d;">If our discussions today do not come to a c=
lear conclusion, </span></p><p class=3D"MsoNormal"><span style=3D"font-famil=
y:Courier New;color:#1f497d;">the chairs are willing to sponsor an interim o=
n the topic. </span></p><p class=3D"MsoNormal"><span style=3D"font-family:Co=
urier New;color:#1f497d;">&nbsp;</span></p><p class=3D"MsoNormal"><span styl=
e=3D"font-family:Courier New;color:#1f497d;">Susan Hares and John Scudder. <=
/span></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d;">&nbsp;</span=
></p><div style=3D"border-style:solid none none;border-top-width:1.0px;borde=
r-top-color:#b5c4df;padding:.0in;"><p class=3D"MsoNormal"><span style=3D"fon=
t-weight:bold;font-size:13.0px;font-family:Tahoma,sans-serif;color:black;">From:=
</span><span style=3D"font-size:13.0px;font-family:Tahoma,sans-serif;color:b=
lack;"> Idr [<a href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf=
.org</a>] <b>On Behalf Of </b>Susan Hares<br><b>Sent:</b> Monday, July 2, 20=
18 1:09 PM<br><b>To:</b> <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br=
><b>Cc:</b> <a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">=
draft-xu-idr-neighbor-autodiscovery@ietf.org</a><br><b>Subject:</b> [Idr] WG=
 adoption call for draft-xu-idr-neighbor-autodiscovery</span></p></div><p cl=
ass=3D"MsoNormal"><span style=3D"color:black;">&nbsp;</span></p><p class=3D"=
MsoNormal"><span style=3D"color:black;">Greetings: </span></p><p class=3D"Ms=
oNormal"><span style=3D"color:black;">&nbsp;</span></p><p class=3D"MsoNormal=
"><span style=3D"color:black;">This begins a 2 week WG adoption call for dra=
ft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16).&nbsp; </span></=
p><p class=3D"MsoNormal"><span style=3D"color:black;">&nbsp;</span></p><p cl=
ass=3D"MsoNormal"><span style=3D"color:black;"><a href=3D"https://datatracke=
r.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/" target=3D"_blank">https=
://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/</a></span><=
/p><p class=3D"MsoNormal"><span style=3D"color:black;">&nbsp;</span></p><p c=
lass=3D"MsoNormal"><span style=3D"color:black;">The authors of this draft sh=
ould send their IPR statements in response to this email. &nbsp;I hope the a=
uthors will ihelp their vacationing co-authors to respond by July 7<sup>th</=
sup>.&nbsp; </span></p><p class=3D"MsoNormal"><span style=3D"color:black;">&=
nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"color:black;">The WG s=
hould consider the following: </span></p><p class=3D"MsoListParagraph" style=
=3D"text-indent:-.2in;"><span style=3D"color:black;">1)</span><span style=3D=
"font-size:9.0px;font-family:Times New Roman,serif;color:black;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp; </span><span style=3D"color:black;">Does BGP need to hav=
e an autodiscovery mechanism for peers within Data Centers? </span></p><p cl=
ass=3D"MsoListParagraph" style=3D"text-indent:-.2in;"><span style=3D"color:b=
lack;">2)</span><span style=3D"font-size:9.0px;font-family:Times New Roman,s=
erif;color:black;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D"colo=
r:black;">Does this mechanism work for other deployments? </span></p><p clas=
s=3D"MsoListParagraph"><span style=3D"color:black;">&nbsp;</span></p><p clas=
s=3D"MsoListParagraph" style=3D"text-indent:-.2in;"><span style=3D"color:bla=
ck;">3)</span><span style=3D"font-size:9.0px;font-family:Times New Roman,ser=
if;color:black;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D"color:=
black;">If so, should be passed in BGP Hello message?&nbsp; </span></p><p cl=
ass=3D"MsoListParagraph"><span style=3D"color:black;">Or should it be a part=
 of another protocol (e.g. LLDP, BFD, etc). </span></p><p class=3D"MsoNormal=
"><span style=3D"color:black;">&nbsp;</span></p><p class=3D"MsoListParagraph=
" style=3D"text-indent:-.2in;"><span style=3D"color:black;">4)</span><span s=
tyle=3D"font-size:9.0px;font-family:Times New Roman,serif;color:black;">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=3D"color:black;">Does this int=
eract with any of the LSVR work? </span></p><p class=3D"MsoNormal"><span sty=
le=3D"color:black;">&nbsp;</span></p><p class=3D"MsoNormal"><span style=3D"c=
olor:black;">I want to thank the authors for their patience while we sorted t=
hrough some of the WG LC for other drafts.&nbsp; We decided to wait until so=
me of those discussion were cleared up prior to starting a new WG Adoption c=
all.</span></p><p class=3D"MsoNormal"><span style=3D"color:black;">&nbsp;</s=
pan></p><p class=3D"MsoNormal"><span style=3D"color:black;">&nbsp;</span></p=
><p class=3D"MsoNormal"><span style=3D"color:black;">Susan Hares </span></p>=
</div><div><p class=3D"MsoNormal" style=3D"line-height:20.0px;"><span style=3D=
"font-size:14.0px;font-family:Tahoma,sans-serif;color:black;">&nbsp;</span><=
/p></div></div></div></blockquote><div style=3D"line-height:20.0px;clear:bot=
h;"><br></div></div></div></div></blockquote><blockquote type=3D"cite"><div>=
<span>_______________________________________________</span><br><span>Idr ma=
iling list</span><br><span><a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><=
/span><br><span><a href=3D"https://www.ietf.org/mailman/listinfo/idr">https:=
//www.ietf.org/mailman/listinfo/idr</a></span><br></div></blockquote></div><=
/div></div></div></div></body></html>=

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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/lq8hcBMnZZg28Ei_06h5gLg6Zn0>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Jakob:

<individual hat on> 

My topic was not the auto-discovery issue or LSVR, but the 

amount of BGP-LS TLVs versus concern over 1 TLV header.  

I was simply noting the vastly different level of 

concern over space usage. 

<individual hat off> 

 

<chair hat on> 

BGP-LS was proposed for today's world.  

 

LSVR is different than basic BGP-LS.

IETF standardization will require management

information for LSVR.  Please discuss your 

concerns on LSVR with the LSVR chairs or a routing AD.  

 

Please continue to discuss your concerns about growing "information" on

IDR proposals - including last calls on the BGP-LS TLV or SR BGP-LS 

as part of the review process.  This input is always welcomed. 

<chair hat off> 

 

Susan Hares 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 9:50 AM
To: Susan Hares; 'John Scudder'
Cc: 'idr wg'; 'Robert Raszuk'
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ...)

 

There's also those that write the code and those that don't.

LSVR is going to be a major multi-man-year project. It's more than "just
another address family".

There is a ton of issues that OSPF and ISIS handle differently.

LSVR will handle them differently again and will have more issues to handle
differently.

The auto-discovery issue is just the start.

Then, implementation is not just protocol definition.

There's config, oper data, Yang, Test automation and the list goes on

 

A brand new protocol like LSVR does not compare with an increment to
extended community code.

Variable length communities requires a rewrite.

My proposal is a major reuse of existing code. Much easier.

 

Regards,

Jakob.

 

From: Susan Hares <shares@ndzh.com> 
Sent: Friday, July 20, 2018 3:25 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>; 'John Scudder'
<jgs@juniper.net>
Cc: 'idr wg' <idr@ietf.org>; 'Robert Raszuk' <robert@raszuk..net>
Subject: RE: [Idr] Fixed sized communities (was Re: Questions on your
presentations ...)

 

Jakob:

<individual contributor hat on> 

 

Two groups of people use BGP.  The BGP-LS people who feel adding TLVs and
TLVs of information is acceptable..  

You claim 1 TLVs is "too much" so that we must spin multiple sizes of
communities.    

Hmm. 

 

<individual contributor hat still on> 

 

Cheerily, Sue 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 12:05 AM
To: John Scudder
Cc: idr wg; Robert Raszuk
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ....)

 

The thing is I want to reuse the extended community code as much as
possible.

The routing policy code and its associated configuration, show, xml and
debug commands is the bulk of it.

The more you deviate, the harder it gets.

Variable length is a big deviation.

 

Regards,

Jakob.

 

From: John Scudder <jgs@juniper.net> 
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: Robert Raszuk <robert@raszuk.net>; Jeffrey Haas <jhaas@pfrc.org>; idr wg
<idr@ietf.org>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ....)

 

(speaking as an individual WG contributor) 

 

I think it is a big mistake to suggest that the reason flexcomms/wide comms
hasn't progressed is that it's variable-length. It's much more ambitious
than any of the fixed-length stuff we have, that's a reason. It's recursive,
that might be a reason too. But just because it's variable-length? Not
buying it.

 

$0.02,

 

--John

 

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz)
<jheitz=40cisco.com@dmarc.ietf.org> wrote:

 

Not at all. Experience has shown that fixed works very well.

Large community went from concept to RFC and code complete with all the
routing policy code in 2 years,

because we could reuse the community code.

Variable length communities started in 2002

 
<https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf..org_html_d
raft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=DwMGaQ&c=HAkYuh63rsuhr6Sc
bfh0UjBXeMK-ndb3voDTXcWzoCI&r=hLt5iDJpw7ukqICc0hoT7A&m=2hIY6rLbAvAIj9fLY9vdC
ZMdoxjfktxXE0SPGa4SW9Y&s=RAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&e=>
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00

The code will have to be written from scratch.

 

Regards,

Jakob.

 

From: Idr < <mailto:idr-bounces@ietf.org> idr-bounces@ietf.org> On Behalf Of
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas < <mailto:jhaas@pfrc.org> jhaas@pfrc.org>
Cc: idr wg < <mailto:idr@ietf.org> idr@ietf.org>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your
presentations ....)

 

 

> If we must do fixed

 

I do not think we must do fixed. I see no reason to stick with fixed. 

 

Experience has proven that fixed does not work .. we see this clear in the
proposals being submitted and even presented at IDR. Time to learn from past
mistakes. 

 

Thx,
Robert

 

 

On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas < <mailto:jhaas@pfrc.org>
jhaas@pfrc.org> wrote:

On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ...
insane
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jakob:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;individual hat on&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>My topic was not the auto-discovery issue or LSVR, but the =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>amount of BGP-LS TLVs versus concern over 1 TLV header. =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I was simply noting the vastly different level of =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>concern over space usage. <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;individual hat off&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;chair hat on&gt; <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>BGP-LS was proposed for today&#8217;s world. =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>LSVR is different than basic BGP-LS.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>IETF standardization will require management<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'> information for LSVR. &nbsp;Please discuss your =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>concerns on LSVR with the LSVR chairs or a routing AD. =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Please continue to discuss your concerns about growing =
&#8220;information&#8221; on<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>IDR proposals &#8211; including last calls on the BGP-LS TLV or SR =
BGP-LS <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>as part of the review process. &nbsp;This input is always welcomed. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;chair hat off&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Susan Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Jakob Heitz =
(jheitz)<br><b>Sent:</b> Friday, July 20, 2018 9:50 AM<br><b>To:</b> =
Susan Hares; 'John Scudder'<br><b>Cc:</b> 'idr wg'; 'Robert =
Raszuk'<br><b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: =
Questions on your presentations ...)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>There's also those that write the code and those =
that don't.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>LSVR =
is going to be a major multi-man-year project. It's more than &quot;just =
another address family&quot;.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>There is a ton of issues that OSPF and ISIS handle =
differently.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>LSVR =
will handle them differently again and will have more issues to handle =
differently.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>The =
auto-discovery issue is just the start.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Then, implementation is not just protocol =
definition.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>There's config, oper data, Yang, Test automation and =
the list goes on<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>A brand new protocol like LSVR does not compare with =
an increment to extended community code.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Variable length communities requires a =
rewrite.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>My =
proposal is a major reuse of existing code. Much =
easier.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Regards,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Jakob.<o:p></o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><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=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> Susan =
Hares &lt;shares@ndzh.com&gt; <br><b>Sent:</b> Friday, July 20, 2018 =
3:25 AM<br><b>To:</b> Jakob Heitz (jheitz) &lt;jheitz@cisco.com&gt;; =
'John Scudder' &lt;jgs@juniper.net&gt;<br><b>Cc:</b> 'idr wg' =
&lt;idr@ietf.org&gt;; 'Robert Raszuk' =
&lt;robert@raszuk..net&gt;<br><b>Subject:</b> RE: [Idr] Fixed sized =
communities (was Re: Questions on your presentations =
...)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jakob:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;individual contributor hat on&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Two groups of people use BGP.&nbsp; The BGP-LS people who feel adding =
TLVs and TLVs of information is acceptable.. =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You claim 1 TLVs is &#8220;too much&#8221; so that we must spin =
multiple sizes of communities.&nbsp;&nbsp; =
&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hmm. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;individual contributor hat still on&gt; <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Cheerily, Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>] =
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br><b>Sent:</b> Friday, July =
20, 2018 12:05 AM<br><b>To:</b> John Scudder<br><b>Cc:</b> idr wg; =
Robert Raszuk<br><b>Subject:</b> Re: [Idr] Fixed sized communities (was =
Re: Questions on your presentations =
....)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>The =
thing is I want to reuse the extended community code as much as =
possible.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>The =
routing policy code and its associated configuration, show, xml and =
debug commands is the bulk of it.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>The more you deviate, the harder it =
gets.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Variable length is a big =
deviation.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Regards,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Jakob.<o:p></o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'><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=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> John =
Scudder &lt;<a href=3D"mailto:jgs@juniper.net">jgs@juniper.net</a>&gt; =
<br><b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br><b>To:</b> Jakob =
Heitz (jheitz) &lt;<a =
href=3D"mailto:jheitz@cisco.com">jheitz@cisco.com</a>&gt;<br><b>Cc:</b> =
Robert Raszuk &lt;<a =
href=3D"mailto:robert@raszuk.net">robert@raszuk.net</a>&gt;; Jeffrey =
Haas &lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@pfrc.org</a>&gt;; idr =
wg &lt;<a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt;<br><b>Subject:</b> Re: =
[Idr] Fixed sized communities (was Re: Questions on your presentations =
....)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>(speaking as =
an individual WG contributor) <o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal>I =
think it is a big mistake to suggest that the reason flexcomms/wide =
comms hasn't progressed is that it's variable-length. It's much more =
ambitious than any of the fixed-length stuff we have, that's a reason. =
It's recursive, that might be a reason too. But just because it's =
variable-length? Not buying it.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>$0.02,<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>--John<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal>On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) =
&lt;<a =
href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org">jheitz=3D40cisco.com@=
dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Not at all. Experience has shown that fixed works =
very well.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'>Large =
community went from concept to RFC and code complete with all the =
routing policy code in 2 years,</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>because we could reuse the community =
code.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Variable length communities started in =
2002</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:#7030A0'><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf=
..org_html_draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&amp;d=3DDwMG=
aQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7=
ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3D=
RAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=3D"><span =
style=3D'color:purple'>https://tools.ietf.org/html/draft-lange-flexible-b=
gp-communities-00</span></a></span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>The code will have to be written from =
scratch.</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>&nbsp;</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Regards,</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>Jakob.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:#7030A0'>&nbsp;</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span class=3Dapple-converted-space><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>&nbsp;</spa=
n></span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>Idr &lt;<a =
href=3D"mailto:idr-bounces@ietf.org"><span =
style=3D'color:purple'>idr-bounces@ietf.org</span></a>&gt;<span =
class=3Dapple-converted-space>&nbsp;</span><b>On Behalf Of<span =
class=3Dapple-converted-space>&nbsp;</span></b>Robert =
Raszuk<br><b>Sent:</b><span =
class=3Dapple-converted-space>&nbsp;</span>Thursday, July 19, 2018 4:21 =
PM<br><b>To:</b><span class=3Dapple-converted-space>&nbsp;</span>Jeffrey =
Haas &lt;<a href=3D"mailto:jhaas@pfrc.org"><span =
style=3D'color:purple'>jhaas@pfrc.org</span></a>&gt;<br><b>Cc:</b><span =
class=3Dapple-converted-space>&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span =
style=3D'color:purple'>idr@ietf.org</span></a>&gt;<br><b>Subject:</b><spa=
n class=3Dapple-converted-space>&nbsp;</span>Re: [Idr] Fixed sized =
communities (was Re: Questions on your presentations =
....)</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.5pt;font-family:"Arial","sans-serif";background:whit=
e'>&gt; If we must do =
fixed</span><o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>I do not think we must do =
fixed. I see no reason to stick with =
fixed.&nbsp;</span><o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Experience has proven that =
fixed does not work .. we see this clear in the proposals being =
submitted and even presented at IDR. Time to learn from past =
mistakes.&nbsp;</span><o:p></o:p></p></div></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>Thx,<br>Robert</span><o:p></o:=
p></p></div></div><div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif"'>&nbsp;</span><o:p></o:p></p></=
div></div></div><div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><div><div><p =
class=3DMsoNormal>On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a =
href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><span =
style=3D'color:purple'>jhaas@pfrc.org</span></a>&gt; =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt;margin-bottom:5..0pt'><div><p class=3DMsoNormal>On Fri, Jul 20, =
2018 at 12:52:44AM +0200, Robert Raszuk wrote:<br>&gt; 4. New additional =
RTC SAFI for 30 octets XXXL ext communities is ... insane<br>&gt; - not =
only obvious but then you would need to get complex dealing with<br>&gt; =
different/opposite filtering results from different RTCs SAFIs.<br><br>I =
would like to offer a very specific reductio ad absurdum:<br>I propose =
that the next version of communities we do, if they must be =
fixed<br>length, must be 253 octets of value and 255 bytes of total =
size.<br><br>If we must do fixed, do it and be done for a long =
while.<br><br>-- =
Jeff<br><br>_______________________________________________<br>Idr =
mailing list<br><a href=3D"mailto:Idr@ietf.org"><span =
style=3D'color:purple'>Idr@ietf.org</span></a><br><a =
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s_A62w&amp;e=3D" target=3D"_blank"><span =
style=3D'color:purple'>https://www.ietf...org/mailman/listinfo/idr</span>=
</a><o:p></o:p></p></div></blockquote></div><div><p =
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class=3DMsoNormal><span =
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From: <bruno.decraene@orange.com>
To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
CC: idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>, John Scudder <jgs@juniper.net>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Date: Fri, 20 Jul 2018 14:15:45 +0000
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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1) I can see that from an implementer standpoint, in the short term, implem=
enting one fixed length community is easier than a variable length one.

But the bigger picture is the long term work for the whole community.

Hence the point is to compare, in the long run, one variable length communi=
ty format to N fixed length community formats. And evaluate the costs of sp=
ecifying, implementing, testing, deploying, debugging, maintaining, operati=
ng (N sets of BGP policies)
It's clear that for N=3D255, one variable community format is better. I can=
't really imagine the nightmare with N=3D20.
Currently we have N=3D3, and two more propositions on the way. So this prop=
osition is N=3D5 in the very short term.

Finally, IMO, the argument "I'm just asking for one more, it's urgent" has =
been taken by the BGP large community attribute. Now we need to look at the=
 big long term picture.


2) Even for your own use case, I would argue that a variable length would b=
e a better fit.
>From the abstract:
"   Auto-derived identifiers are used by applications to enable zero
   configuration features.  Such identifiers are often a combination of
   primitive identifiers and are thus longer. "

I think the sentence is missing "and variable in length"

Thanks,
Regards,
--Bruno


From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 12:05 AM
To: John Scudder
Cc: idr wg; Robert Raszuk
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

The thing is I want to reuse the extended community code as much as possibl=
e.
The routing policy code and its associated configuration, show, xml and deb=
ug commands is the bulk of it.
The more you deviate, the harder it gets.
Variable length is a big deviation.

Regards,
Jakob.

From: John Scudder <jgs@juniper.net>
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: Robert Raszuk <robert@raszuk.net>; Jeffrey Haas <jhaas@pfrc.org>; idr w=
g <idr@ietf.org>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

(speaking as an individual WG contributor)

I think it is a big mistake to suggest that the reason flexcomms/wide comms=
 hasn't progressed is that it's variable-length. It's much more ambitious t=
han any of the fixed-length stuff we have, that's a reason. It's recursive,=
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.

$0.02,

--John

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <jheitz=3D40cisco.com@dm=
arc.ietf.org<mailto:jheitz=3D40cisco.com@dmarc.ietf.org>> wrote:

Not at all. Experience has shown that fixed works very well.
Large community went from concept to RFC and code complete with all the rou=
ting policy code in 2 years,
because we could reuse the community code.
Variable length communities started in 2002
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00<https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scb=
fh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rLbAvAIj9fLY=
9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&=
e=3D>
The code will have to be written from scratch.

Regards,
Jakob.

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of =
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>
Cc: idr wg <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)


> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the =
proposals being submitted and even presented at IDR. Time to learn from pas=
t mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@=
pfrc.org>> wrote:
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insa=
ne
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

_______________________________________________
Idr mailing list
Idr@ietf.org<mailto:Idr@ietf.org>
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">1) I can see t=
hat from an implementer standpoint, in the short term, implementing one fix=
ed length community is easier than a variable length one.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">But the bigger=
 picture is the long term work for the whole community.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Hence the poin=
t is to compare, in the long run, one variable length community format to N=
 fixed length community formats. And evaluate the costs of
 specifying, implementing, testing, deploying, debugging, maintaining, oper=
ating (N sets of BGP policies)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">It&#8217;s cle=
ar that for N=3D255, one variable community format is better. I can&#8217;t=
 really imagine the nightmare with N=3D20.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Currently we h=
ave N=3D3, and two more propositions on the way. So this proposition is N=
=3D5 in the very short term.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Finally, IMO, =
the argument &#8220;I&#8217;m just asking for one more, it&#8217;s urgent&#=
8221; has been taken by the BGP large community attribute. Now we need to l=
ook at
 the big long term picture.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">2) Even for yo=
ur own use case, I would argue that a variable length would be a better fit=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">From the abstr=
act:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;">&#8220;&nbsp;&nbsp; Auto-=
derived identifiers are used by applications to enable zero<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;">&nbsp;&nbsp; configuratio=
n features.&nbsp; Such identifiers are often a combination of<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;">&nbsp;&nbsp; primitive id=
entifiers and are thus longer. &#8220;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">I think the se=
ntence is missing &#8220;and variable in length&#8221;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Regards,<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">--Bruno<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><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 #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<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;"> Idr [mai=
lto:idr-bounces@ietf.org]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Friday, July 20, 2018 12:05 AM<br>
<b>To:</b> John Scudder<br>
<b>Cc:</b> idr wg; Robert Raszuk<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The thing i=
s I want to reuse the extended community code as much as possible.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The routing=
 policy code and its associated configuration, show, xml and debug commands=
 is the bulk of it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The more yo=
u deviate, the harder it gets.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Variable le=
ngth is a big deviation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><o:p>&nbsp;=
</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Regards,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Jakob.<o:p>=
</o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><o:p>&nbsp;=
</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span=
 lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&=
quot;sans-serif&quot;"> John Scudder &lt;jgs@juniper.net&gt;
<br>
<b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;jheitz@cisco.com&gt;<br>
<b>Cc:</b> Robert Raszuk &lt;robert@raszuk.net&gt;; Jeffrey Haas &lt;jhaas@=
pfrc.org&gt;; idr wg &lt;idr@ietf.org&gt;<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<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">(speaking as an individual WG c=
ontributor)
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I think it is a big mistake to =
suggest that the reason flexcomms/wide comms hasn't progressed is that it's=
 variable-length. It's much more ambitious than any of the fixed-length stu=
ff we have, that's a reason. It's recursive,
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">$0.02,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">--John<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Jul 19, 2018, at 11:48 PM, J=
akob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.o=
rg">jheitz=3D40cisco.com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Not at all.=
 Experience has shown that fixed works very well.</span><span lang=3D"EN-US=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Large commu=
nity went from concept to RFC and code complete with all the routing policy=
 code in 2 years,</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">because we =
could reuse the community code.</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Variable le=
ngth communities started in 2002</span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><a href=3D"=
https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_=
draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&amp;d=3DDwMGaQ&amp;c=3DHA=
kYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&am=
p;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO=
98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=3D"><span style=3D"color:purple">https://t=
ools.ietf.org/html/draft-lange-flexible-bgp-communities-00</span></a></span=
><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The code wi=
ll have to be written from scratch.</span><span lang=3D"EN-US"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">&nbsp;</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Regards,</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Jakob.</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">&nbsp;</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span=
 class=3D"apple-converted-space"><span lang=3D"EN-US" style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">&nbsp;</span><=
/span><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,&quot;sans-serif&quot;">Idr
 &lt;<a href=3D"mailto:idr-bounces@ietf.org"><span style=3D"color:purple">i=
dr-bounces@ietf.org</span></a>&gt;<span class=3D"apple-converted-space">&nb=
sp;</span><b>On Behalf Of<span class=3D"apple-converted-space">&nbsp;</span=
></b>Robert Raszuk<br>
<b>Sent:</b><span class=3D"apple-converted-space">&nbsp;</span>Thursday, Ju=
ly 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"apple-converted-space">&nbsp;</span>Jeffrey Haas &=
lt;<a href=3D"mailto:jhaas@pfrc.org"><span style=3D"color:purple">jhaas@pfr=
c.org</span></a>&gt;<br>
<b>Cc:</b><span class=3D"apple-converted-space">&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span style=3D"color:purple">idr@ietf.org</spa=
n></a>&gt;<br>
<b>Subject:</b><span class=3D"apple-converted-space">&nbsp;</span>Re: [Idr]=
 Fixed sized communities (was Re: Questions on your presentations ...)</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.5pt;font-f=
amily:&quot;Arial&quot;,&quot;sans-serif&quot;;background:white">&gt; If we=
 must do fixed</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">I do not think we must do fixed. I see no r=
eason to stick with fixed.&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">Experience has proven that fixed does not w=
ork .. we see this clear in the proposals being submitted and even presente=
d at IDR. Time to learn from past mistakes.&nbsp;</span><span lang=3D"EN-US=
"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">Thx,<br>
Robert</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Fri, Jul 20, 2018 at 1:11 AM=
, Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><spa=
n style=3D"color:purple">jhaas@pfrc.org</span></a>&gt; wrote:<o:p></o:p></s=
pan></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-=
bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Fri, Jul 20, 2018 at 12:52:4=
4AM &#43;0200, Robert Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org"><span style=3D"color:purple">Idr@ietf.org</=
span></a><br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9v=
dCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62=
w&amp;e=3D" target=3D"_blank"><span style=3D"color:purple">https://www.ietf=
..org/mailman/listinfo/idr</span></a><o:p></o:p></span></p>
</div>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt;font-f=
amily:&quot;Helvetica&quot;,&quot;sans-serif&quot;">_______________________=
________________________<br>
Idr mailing list<br>
</span><span lang=3D"EN-US"><a href=3D"mailto:Idr@ietf.org"><span style=3D"=
font-size:9.0pt;font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;;co=
lor:purple">Idr@ietf.org</span></a></span><span lang=3D"EN-US" style=3D"fon=
t-size:9.0pt;font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;"><br>
</span><span lang=3D"EN-US"><a href=3D"https://urldefense.proofpoint.com/v2=
/url?u=3Dhttps-3A__www.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=
=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT=
7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM1=
1nlzarMDH82yonWcxAhaK1ABXs_A62w&amp;e=3D"><span style=3D"font-size:9.0pt;fo=
nt-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;;color:purple">https:=
//urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailman_listi=
nfo_idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&=
amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SP=
Ga4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62w&amp;e=3D</span>=
</a><o:p></o:p></span></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</div>
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To: "'Gaurav Dawra'" <gdawra.ietf@gmail.com>, =?utf-8?B?JyLlvpDlsI/omY4o5LmJ5YWIKSIn?= <xiaohu.xxh@alibaba-inc.com>
Cc: "'idr'" <idr@ietf.org>, "'draft-xu-idr-neighbor-autodiscovery'" <draft-xu-idr-neighbor-autodiscovery@ietf.org>,  "'Idr'" <idr-bounces@ietf.org>
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Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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Gaurav:

=20

We need input on requirements rather than solutions at this time.   At =
this point, we are not considering any solutions until we define the =
requirements.  Please help us define the requirements.=20

=20

Susan Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Gaurav Dawra
Sent: Friday, July 20, 2018 10:03 AM
To: "=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)"
Cc: idr; draft-xu-idr-neighbor-autodiscovery; Idr; Susan Hares
Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

Hi Sue,

=20

As I have shared earlier during adoption call. I have specific concerns =
on this document which we have shared with the authors on thread and =
offline. There are no authors currently from LinkedIn.

=20

We will continue to provide input once those concerns have been =
addressed.

=20

Cheers,

=20

Gaurav

Sent from my iPhone


On Jul 20, 2018, at 7:49 AM, =
=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) =
<xiaohu.xxh@alibaba-inc.com> wrote:

Hi Sue,

=20

Understood, I will.=20

=20

By the way, some authors of this draft are exactly from MSDC operators =
including Alibaba, Tencent and LinkedIn.

=20

Best regards,

Xiaohu

=20

------------------------------------------------------------------

From:Susan Hares <shares@ndzh.com>

Send =
Time:2018=E5=B9=B47=E6=9C=8820=E6=97=A5(=E6=98=9F=E6=9C=9F=E4=BA=94) =
19:18

To:=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88) =
<xiaohu.xxh@alibaba-inc.com>; Idr <idr-bounces@ietf.org>; idr =
<idr@ietf.org>

Cc:draft-xu-idr-neighbor-autodiscovery =
<draft-xu-idr-neighbor-autodiscovery@ietf.org>

Subject:RE: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

Xiaohu:

=20

Our next step is to gather requirements for the IDR neighbor discovery =
from the WG.  We would especially be interested in feedback on =
requirements from operators of data centers.  If you know of an =
operators of medium data centers who could send requirements to the IDR =
chairs or the IDR list, it would be helpful.

=20

Cheerily, Susan Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of ???(??)
Sent: Friday, July 20, 2018 7:12 AM
To: Idr; idr
Cc: draft-xu-idr-neighbor-autodiscovery
Subject: Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

=20

Hi Sue,

=20

Thanks for launching the WG adoption call for =
draft-xu-idr-neighbor-autodiscovery.

=20

Hi all,

=20

There has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other vendors =
are under construction. If any of you have any concrete and technical =
concerns on this mechanism, please feel free to tell us and we would =
like to verify your concerns on the implementation and then give you =
feedbacks.

=20

Best regards,

Xiaohu

------------------------------------------------------------------

From:Susan Hares <shares@ndzh.com>

Send =
Time:2018=E5=B9=B47=E6=9C=8819=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) =
17:59

To:idr <idr@ietf.org>

Cc:draft-xu-idr-neighbor-autodiscovery =
<draft-xu-idr-neighbor-autodiscovery@ietf.org>

Subject:Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery

=20

This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery

(July 2 =E2=80=93 July 16).=20

=20

The WG chairs conclude on my original questions that:=20

1)  There is WG interest to have an auto-discovery mechanism=20

that will work for BGP peers in Data Centers

=20

2)  There is some WG  interest having this work

in other deployments.=20

=20

3)  There is no consensus on the mechanisms=20

(BGP hellos or other mechanisms)=20

Or requirements for the mechanisms.=20

=20

4)  There is WG consensus and AD Consensus that we should=20

collaborate with LSVR. One mechanism for both would=20

be good, but it needs to fit the requirements set

by the WG. =20

=20

There is no consensus on adoption this draft.=20

=20

During today=E2=80=99s IDR session (18:10-19:10), we will have a=20

discussion on the requirements for the auto-discovery mechanisms.=20

We will start by reviewing the LSVR requirement set.

=20

If our discussions today do not come to a clear conclusion,=20

the chairs are willing to sponsor an interim on the topic.=20

=20

Susan Hares and John Scudder.=20

=20

From: Idr [mailto:idr-bounces@ietf..org <mailto:idr-bounces@ietf.org> ] =
On Behalf Of Susan Hares
Sent: Monday, July 2, 2018 1:09 PM
To: idr@ietf.org
Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org
Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery

=20

Greetings:=20

=20

This begins a 2 week WG adoption call for =
draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 16). =20

=20

https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/

=20

The authors of this draft should send their IPR statements in response =
to this email.  I hope the authors will ihelp their vacationing =
co-authors to respond by July 7th. =20

=20

The WG should consider the following:=20

1)      Does BGP need to have an autodiscovery mechanism for peers =
within Data Centers?=20

2)      Does this mechanism work for other deployments?=20

=20

3)      If so, should be passed in BGP Hello message? =20

Or should it be a part of another protocol (e.g. LLDP, BFD, etc).=20

=20

4)      Does this interact with any of the LSVR work?=20

=20

I want to thank the authors for their patience while we sorted through =
some of the WG LC for other drafts.  We decided to wait until some of =
those discussion were cleared up prior to starting a new WG Adoption =
call.

=20

=20

Susan Hares=20

=20

=20

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr


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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Gaurav:<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>We need input on =
requirements rather than solutions at this time. =C2=A0=C2=A0At this =
point, we are not considering any solutions until we define the =
requirements.=C2=A0 Please help us define the requirements. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Susan Hares =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-US'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-US'> Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of =
</b>Gaurav Dawra<br><b>Sent:</b> Friday, July 20, 2018 10:03 =
AM<br><b>To:</b> &quot;</span><span =
style=3D'font-size:10.0pt;font-family:"MS UI =
Gothic","sans-serif";mso-fareast-language:EN-US'>=E5=BE=90=E5=B0=8F=E8=99=
=8E</span><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-US'>(</span><span =
style=3D'font-size:10.0pt;font-family:SimSun;mso-fareast-language:EN-US'>=
=E4=B9=89=E5=85=88</span><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-US'>)&quot;<br><b>Cc:</b> idr; =
draft-xu-idr-neighbor-autodiscovery; Idr; Susan Hares<br><b>Subject:</b> =
Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><div><div><p =
class=3DMsoNormal>Hi Sue,<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>As I have shared earlier during adoption call. I have =
specific concerns on this document which we have shared with the authors =
on thread and offline. There are no authors currently from =
LinkedIn.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>We will continue to provide input once those concerns =
have been addressed.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Cheers,<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Gaurav<o:p></o:p></p><div =
id=3DAppleMailSignature><p class=3DMsoNormal>Sent from my =
iPhone<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><br>On Jul 20, 2018, at 7:49 AM, <span =
lang=3DZH-CN style=3D'font-family:"MS =
Gothic"'>=E5=BE=90=E5=B0=8F=E8=99=8E</span>(<span lang=3DZH-CN =
style=3D'font-family:SimSun'>=E4=B9=89=E5=85=88</span>) &lt;<a =
href=3D"mailto:xiaohu.xxh@alibaba-inc.com">xiaohu.xxh@alibaba-inc.com</a>=
&gt; wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Hi Sue,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Understood, I will.&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
By the way, some authors of this draft are exactly from MSDC operators =
including&nbsp;Alibaba, Tencent and =
LinkedIn.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Best regards,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Xiaohu<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><blockquote =
style=3D'margin-right:0in'><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
------------------------------------------------------------------<o:p></=
o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
From:Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<o:p></o:p></span>=
</p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Send Time:2018</span><span lang=3DZH-CN =
style=3D'font-size:10.5pt;font-family:"MS UI =
Gothic","sans-serif";color:black'>=E5=B9=B4</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
7</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS UI =
Gothic","sans-serif";color:black'>=E6=9C=88</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
20</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS UI =
Gothic","sans-serif";color:black'>=E6=97=A5</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
(</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS UI =
Gothic","sans-serif";color:black'>=E6=98=9F=E6=9C=9F=E4=BA=94</span><span=
 =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
) 19:18<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
To:</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
UI =
Gothic","sans-serif";color:black'>=E5=BE=90=E5=B0=8F=E8=99=8E</span><span=
 =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
(</span><span lang=3DZH-CN =
style=3D'font-size:10.5pt;font-family:SimSun;color:black'>=E4=B9=89=E5=85=
=88</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
) &lt;<a =
href=3D"mailto:xiaohu.xxh@alibaba-inc.com">xiaohu.xxh@alibaba-inc.com</a>=
&gt;; Idr &lt;<a =
href=3D"mailto:idr-bounces@ietf.org">idr-bounces@ietf.org</a>&gt;; idr =
&lt;<a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt;<o:p></o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Cc:draft-xu-idr-neighbor-autodiscovery &lt;<a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-idr=
-neighbor-autodiscovery@ietf.org</a>&gt;<o:p></o:p></span></p></div><div>=
<p class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Subject:RE: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
<o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Xiaohu:</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Our next step is to gather requirements for the =
IDR neighbor discovery from the WG. &nbsp;We would especially be =
interested in feedback on requirements from operators of data =
centers.&nbsp; If you know of an operators of medium data centers who =
could send requirements to the IDR chairs or the IDR list, it would be =
helpful.</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Cheerily, Susan Hares </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
 Idr [<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>] =
<b>On Behalf Of </b>???(??)<br><b>Sent:</b> Friday, July 20, 2018 7:12 =
AM<br><b>To:</b> Idr; idr<br><b>Cc:</b> =
draft-xu-idr-neighbor-autodiscovery<br><b>Subject:</b> Re: [Idr] WG =
adoption call for draft-xu-idr-neighbor-autodiscovery</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Hi Sue,</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Thanks for launching the WG adoption call for&nbsp;<span =
style=3D'background:white'>draft-xu-idr-neighbor-autodiscovery.</span></s=
pan><span style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Hi all,</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
There has been one implementation developed by a switch vendor. =
Furthermore at least two additional implementations from other =
vendors&nbsp;are under construction. If any of you have any concrete and =
technical&nbsp;concerns on this mechanism, please feel free to&nbsp;tell =
us and we would like to verify your&nbsp;concerns on the implementation =
and then give you feedbacks.</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Best regards,</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Xiaohu</span><span style=3D'color:black'><o:p></o:p></span></p><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
------------------------------------------------------------------</span>=
<span style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
From:Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Send Time:2018</span><span lang=3DZH-CN =
style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E5=B9=B4</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
7</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E6=9C=88</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
19</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E6=97=A5</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
(</span><span lang=3DZH-CN style=3D'font-size:10.5pt;font-family:"MS =
Gothic";color:black'>=E6=98=9F=E6=9C=9F=E5=9B=9B</span><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
) 17:59</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
To:idr &lt;<a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Cc:draft-xu-idr-neighbor-autodiscovery &lt;<a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-idr=
-neighbor-autodiscovery@ietf.org</a>&gt;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
Subject:Re: [Idr] WG adoption call for =
draft-xu-idr-neighbor-autodiscovery</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.5pt;font-family:"Tahoma","sans-serif";color:black'>=
&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>This closes the 2 week adoption for =
draft-xu-idr-neighbor-autodiscovery</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>(July 2 =E2=80=93 July =
16). </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Courier =
New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>The WG chairs conclude =
on my original questions that: </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>1)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is WG interest =
to have an auto-discovery mechanism </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>that will work for BGP peers in Data =
Centers</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>2)</span><span style=3D'font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is some WG =
&nbsp;interest having this work</span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>in other deployments. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>3)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is no consensus =
on the mechanisms </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>(BGP hellos or other mechanisms) </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>Or requirements for the mechanisms. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'font-family:"Courier =
New";color:#1F497D'>4)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:#1F497D'>&nbsp; </span><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is WG consensus =
and AD Consensus that we should </span><span =
style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>collaborate with LSVR. One mechanism for both would =
</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>be good, but it needs to fit the requirements =
set</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoListParagraph><span style=3D'font-family:"Courier =
New";color:#1F497D'>by the WG. &nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>There is no consensus =
on adoption this draft. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>During today=E2=80=99s =
IDR session (18:10-19:10), we will have a </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>discussion on the =
requirements for the auto-discovery mechanisms. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>We will start by =
reviewing the LSVR requirement set.</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>If our discussions =
today do not come to a clear conclusion, </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>the chairs are willing =
to sponsor an interim on the topic. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Courier New";color:#1F497D'>Susan Hares and John =
Scudder. </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:0in 0in 0in =
0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
 Idr [<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf..org</a>] =
<b>On Behalf Of </b>Susan Hares<br><b>Sent:</b> Monday, July 2, 2018 =
1:09 PM<br><b>To:</b> <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Cc:</b> <a =
href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-idr=
-neighbor-autodiscovery@ietf.org</a><br><b>Subject:</b> [Idr] WG =
adoption call for draft-xu-idr-neighbor-autodiscovery</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><p =
class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>Greetings: =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>This begins a 2 week WG =
adoption call for draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 =
July 16).&nbsp; <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'><a =
href=3D"https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscov=
ery/" =
target=3D"_blank">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-=
autodiscovery/</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>The authors of this draft =
should send their IPR statements in response to this email. &nbsp;I hope =
the authors will ihelp their vacationing co-authors to respond by July =
7<sup>th</sup>.&nbsp; <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>The WG should consider the =
following: <o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.2in'><span style=3D'color:black'>1)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>Does BGP need to have an autodiscovery mechanism =
for peers within Data Centers? <o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.2in'><span =
style=3D'color:black'>2)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>Does this mechanism work for other deployments? =
<o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.2in'><span =
style=3D'color:black'>3)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>If so, should be passed in BGP Hello =
message?&nbsp; <o:p></o:p></span></p><p class=3DMsoListParagraph><span =
style=3D'color:black'>Or should it be a part of another protocol (e.g. =
LLDP, BFD, etc). <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.2in'><span =
style=3D'color:black'>4)</span><span =
style=3D'font-size:7.0pt;font-family:"Times New =
Roman","serif";color:black'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'color:black'>Does this interact with any of the LSVR work? =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:black'>I want to thank the =
authors for their patience while we sorted through some of the WG LC for =
other drafts.&nbsp; We decided to wait until some of those discussion =
were cleared up prior to starting a new WG Adoption =
call.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p =
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>
CC: idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>, John Scudder <jgs@juniper.net>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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I'm going for bang for the buck.
There is not enough bang for the buck in variable length communities.
I cannot see variable length communities ever being developed.
We will keep squeezing the existing communities and when someone really nee=
ds an attribute that won't fit into one or a set of communities, they will =
develop a new attribute.

Regards,
Jakob.

From: bruno.decraene@orange.com <bruno.decraene@orange.com>
Sent: Friday, July 20, 2018 7:16 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: idr wg <idr@ietf.org>; Robert Raszuk <robert@raszuk.net>; John Scudder =
<jgs@juniper.net>
Subject: RE: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

1) I can see that from an implementer standpoint, in the short term, implem=
enting one fixed length community is easier than a variable length one.

But the bigger picture is the long term work for the whole community.

Hence the point is to compare, in the long run, one variable length communi=
ty format to N fixed length community formats. And evaluate the costs of sp=
ecifying, implementing, testing, deploying, debugging, maintaining, operati=
ng (N sets of BGP policies)
It's clear that for N=3D255, one variable community format is better. I can=
't really imagine the nightmare with N=3D20.
Currently we have N=3D3, and two more propositions on the way. So this prop=
osition is N=3D5 in the very short term.

Finally, IMO, the argument "I'm just asking for one more, it's urgent" has =
been taken by the BGP large community attribute. Now we need to look at the=
 big long term picture.


2) Even for your own use case, I would argue that a variable length would b=
e a better fit..
>From the abstract:
"   Auto-derived identifiers are used by applications to enable zero
   configuration features.  Such identifiers are often a combination of
   primitive identifiers and are thus longer. "

I think the sentence is missing "and variable in length"

Thanks,
Regards,
--Bruno


From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 12:05 AM
To: John Scudder
Cc: idr wg; Robert Raszuk
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

The thing is I want to reuse the extended community code as much as possibl=
e.
The routing policy code and its associated configuration, show, xml and deb=
ug commands is the bulk of it.
The more you deviate, the harder it gets.
Variable length is a big deviation.

Regards,
Jakob.

From: John Scudder <jgs@juniper.net<mailto:jgs@juniper.net>>
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com<mailto:jheitz@cisco.com>>
Cc: Robert Raszuk <robert@raszuk.net<mailto:robert@raszuk.net>>; Jeffrey Ha=
as <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>; idr wg <idr@ietf.org<mailto:idr=
@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

(speaking as an individual WG contributor)

I think it is a big mistake to suggest that the reason flexcomms/wide comms=
 hasn't progressed is that it's variable-length. It's much more ambitious t=
han any of the fixed-length stuff we have, that's a reason. It's recursive,=
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.

$0.02,

--John

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <jheitz=3D40cisco.com@dm=
arc.ietf.org<mailto:jheitz=3D40cisco.com@dmarc.ietf.org>> wrote:

Not at all. Experience has shown that fixed works very well.
Large community went from concept to RFC and code complete with all the rou=
ting policy code in 2 years,
because we could reuse the community code.
Variable length communities started in 2002
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00<https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scb=
fh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rLbAvAIj9fLY=
9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&=
e=3D>
The code will have to be written from scratch.

Regards,
Jakob.

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of =
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>
Cc: idr wg <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)


> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the =
proposals being submitted and even presented at IDR. Time to learn from pas=
t mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@=
pfrc.org>> wrote:
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insa=
ne
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

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<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">I'm going for bang for the buck.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">There is not enough bang for the buck in var=
iable length communities.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">I cannot see variable length communities eve=
r being developed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">We will keep squeezing the existing communit=
ies and when someone really needs an attribute that won't fit into one or a=
 set of communities, they will develop a new attribute.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
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0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> bruno.decraene@orange.com &lt;=
bruno.decraene@orange.com&gt;
<br>
<b>Sent:</b> Friday, July 20, 2018 7:16 AM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;jheitz@cisco.com&gt;<br>
<b>Cc:</b> idr wg &lt;idr@ietf.org&gt;; Robert Raszuk &lt;robert@raszuk.net=
&gt;; John Scudder &lt;jgs@juniper.net&gt;<br>
<b>Subject:</b> RE: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<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:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">1) I can see that from an implementer sta=
ndpoint, in the short term, implementing one fixed length community is easi=
er than a variable length one.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">But the bigger picture is the long term w=
ork for the whole community.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Hence the point is to compare, in the lon=
g run, one variable length community format to N fixed length community for=
mats. And evaluate the costs of specifying, implementing,
 testing, deploying, debugging, maintaining, operating (N sets of BGP polic=
ies)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">It&#8217;s clear that for N=3D255, one va=
riable community format is better. I can&#8217;t really imagine the nightma=
re with N=3D20.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Currently we have N=3D3, and two more pro=
positions on the way. So this proposition is N=3D5 in the very short term.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Finally, IMO, the argument &#8220;I&#8217=
;m just asking for one more, it&#8217;s urgent&#8221; has been taken by the=
 BGP large community attribute. Now we need to look at the big long term
 picture.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">2) Even for your own use case, I would ar=
gue that a variable length would be a better fit..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">From the abstract:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&#8220;&nbsp;&nbsp; Auto-derived identifiers are used by a=
pplications to enable zero<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; configuration features.&nbsp; Such identifier=
s are often a combination of<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;">&nbsp;&nbsp; primitive identifiers and are thus longer. &#=
8220;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">I think the sentence is missing &#8220;an=
d variable in length&#8221;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">--Bruno<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><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 #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span lang=3D"FR" style=3D"font-size:10.0pt;font-=
family:&quot;Tahoma&quot;,sans-serif">From:</span></b><span lang=3D"FR" sty=
le=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Friday, July 20, 2018 12:05 AM<br>
<b>To:</b> John Scudder<br>
<b>Cc:</b> idr wg; Robert Raszuk<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"FR"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The thing is I want to reuse the extended co=
mmunity code as much as possible.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The routing policy code and its associated c=
onfiguration, show, xml and debug commands is the bulk of it.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The more you deviate, the harder it gets.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length is a big deviation.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> John Scudder &lt;<a href=3D"ma=
ilto:jgs@juniper.net">jgs@juniper.net</a>&gt;
<br>
<b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com">jhe=
itz@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net">robert@ra=
szuk.net</a>&gt;; Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@=
pfrc.org</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</=
a>&gt;<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">(speaking as an individual WG contributor) <o:p></o:=
p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">I think it is a big mistake to suggest that the reas=
on flexcomms/wide comms hasn't progressed is that it's variable-length. It'=
s much more ambitious than any of the fixed-length stuff we have, that's a =
reason. It's recursive, that might
 be a reason too. But just because it's variable-length? Not buying it.<o:p=
></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">$0.02,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">--John<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) &=
lt;<a href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.org">jheitz=3D40cisco.=
com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Not at all. Experience has shown that fixed =
works very well.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Large community went from concept to RFC and=
 code complete with all the routing policy code in 2 years,</span><o:p></o:=
p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">because we could reuse the community code.</=
span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Variable length communities started in 2002<=
/span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0"><a href=3D"https://urldefense.proofpoint.com=
/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2Dlange-2Dflexible-2Dbgp-2D=
communities-2D00&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voD=
TXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxj=
fktxXE0SPGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=
=3D"><span style=3D"color:purple">https://tools.ietf.org/html/draft-lange-f=
lexible-bgp-communities-00</span></a></span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">The code will have to be written from scratc=
h.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">Jakob.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030A0">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span class=3D"apple-converted-s=
pace"><span style=3D"font-family:&quot;Calibri&quot;,sans-serif">&nbsp;</sp=
an></span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,s=
ans-serif">Idr
 &lt;<a href=3D"mailto:idr-bounces@ietf.org"><span style=3D"color:purple">i=
dr-bounces@ietf.org</span></a>&gt;<span class=3D"apple-converted-space">&nb=
sp;</span><b>On Behalf Of<span class=3D"apple-converted-space">&nbsp;</span=
></b>Robert Raszuk<br>
<b>Sent:</b><span class=3D"apple-converted-space">&nbsp;</span>Thursday, Ju=
ly 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"apple-converted-space">&nbsp;</span>Jeffrey Haas &=
lt;<a href=3D"mailto:jhaas@pfrc.org"><span style=3D"color:purple">jhaas@pfr=
c.org</span></a>&gt;<br>
<b>Cc:</b><span class=3D"apple-converted-space">&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span style=3D"color:purple">idr@ietf.org</spa=
n></a>&gt;<br>
<b>Subject:</b><span class=3D"apple-converted-space">&nbsp;</span>Re: [Idr]=
 Fixed sized communities (was Re: Questions on your presentations ...)</spa=
n><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.5pt;font-family:&quot;Ari=
al&quot;,sans-serif;background:white">&gt; If we must do fixed</span><o:p><=
/o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I do not think we must do fixed. I see no reason to stick with fixed.&=
nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Experience has proven that fixed does not work .. we see this clear in=
 the proposals being submitted and even presented at IDR. Time to learn fro=
m past mistakes.&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,<br>
Robert</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas &lt;<a=
 href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><span style=3D"color:purp=
le">jhaas@pfrc.org</span></a>&gt; wrote:<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On Fri, Jul 20, 2018 at 12:52:44AM &#43;0200, Robert=
 Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org"><span style=3D"color:purple">Idr@ietf.org</=
span></a><br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.=
org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9v=
dCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62=
w&amp;e=3D" target=3D"_blank"><span style=3D"color:purple">https://www.ietf=
...org/mailman/listinfo/idr</span></a><o:p></o:p></p>
</div>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">_______________________________________________<br=
>
Idr mailing list<br>
</span><a href=3D"mailto:Idr@ietf.org"><span style=3D"font-size:9.0pt;font-=
family:&quot;Helvetica&quot;,sans-serif;color:purple">Idr@ietf.org</span></=
a><span style=3D"font-size:9.0pt;font-family:&quot;Helvetica&quot;,sans-ser=
if"><br>
</span><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__ww=
w.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0=
UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAI=
j9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1A=
BXs_A62w&amp;e=3D"><span style=3D"font-size:9.0pt;font-family:&quot;Helveti=
ca&quot;,sans-serif;color:purple">https://urldefense.proofpoint.com/v2/url?=
u=3Dhttps-3A__www.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=3DHAkY=
uh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;=
m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarM=
DH82yonWcxAhaK1ABXs_A62w&amp;e=3D</span></a><o:p></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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From: <bruno.decraene@orange.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
CC: idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>, John Scudder <jgs@juniper.net>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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That's the same argument: you are seeking local optimization based on your =
position in the ecosystem.
But there are other positions.
Thanks for acknowledging that your plan is to continue requesting additiona=
l fixed length community attributes forever.

Regards,
--Bruno

From: Jakob Heitz (jheitz) [mailto:jheitz@cisco.com]
Sent: Friday, July 20, 2018 11:03 AM
To: DECRAENE Bruno IMT/OLN
Cc: idr wg; Robert Raszuk; John Scudder
Subject: RE: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

I'm going for bang for the buck.
There is not enough bang for the buck in variable length communities.
I cannot see variable length communities ever being developed.
We will keep squeezing the existing communities and when someone really nee=
ds an attribute that won't fit into one or a set of communities, they will =
develop a new attribute.

Regards,
Jakob.

From: bruno.decraene@orange.com <bruno.decraene@orange.com>
Sent: Friday, July 20, 2018 7:16 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: idr wg <idr@ietf.org>; Robert Raszuk <robert@raszuk.net>; John Scudder =
<jgs@juniper.net>
Subject: RE: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

1) I can see that from an implementer standpoint, in the short term, implem=
enting one fixed length community is easier than a variable length one.

But the bigger picture is the long term work for the whole community.

Hence the point is to compare, in the long run, one variable length communi=
ty format to N fixed length community formats. And evaluate the costs of sp=
ecifying, implementing, testing, deploying, debugging, maintaining, operati=
ng (N sets of BGP policies)
It's clear that for N=3D255, one variable community format is better. I can=
't really imagine the nightmare with N=3D20.
Currently we have N=3D3, and two more propositions on the way. So this prop=
osition is N=3D5 in the very short term.

Finally, IMO, the argument "I'm just asking for one more, it's urgent" has =
been taken by the BGP large community attribute. Now we need to look at the=
 big long term picture.


2) Even for your own use case, I would argue that a variable length would b=
e a better fit..
>From the abstract:
"   Auto-derived identifiers are used by applications to enable zero
   configuration features.  Such identifiers are often a combination of
   primitive identifiers and are thus longer. "

I think the sentence is missing "and variable in length"

Thanks,
Regards,
--Bruno


From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz (jheitz)
Sent: Friday, July 20, 2018 12:05 AM
To: John Scudder
Cc: idr wg; Robert Raszuk
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

The thing is I want to reuse the extended community code as much as possibl=
e.
The routing policy code and its associated configuration, show, xml and deb=
ug commands is the bulk of it.
The more you deviate, the harder it gets.
Variable length is a big deviation.

Regards,
Jakob.

From: John Scudder <jgs@juniper.net<mailto:jgs@juniper.net>>
Sent: Thursday, July 19, 2018 8:53 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com<mailto:jheitz@cisco.com>>
Cc: Robert Raszuk <robert@raszuk.net<mailto:robert@raszuk.net>>; Jeffrey Ha=
as <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>; idr wg <idr@ietf.org<mailto:idr=
@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

(speaking as an individual WG contributor)

I think it is a big mistake to suggest that the reason flexcomms/wide comms=
 hasn't progressed is that it's variable-length. It's much more ambitious t=
han any of the fixed-length stuff we have, that's a reason. It's recursive,=
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.

$0.02,

--John

On Jul 19, 2018, at 11:48 PM, Jakob Heitz (jheitz) <jheitz=3D40cisco.com@dm=
arc.ietf.org<mailto:jheitz=3D40cisco.com@dmarc.ietf.org>> wrote:

Not at all. Experience has shown that fixed works very well.
Large community went from concept to RFC and code complete with all the rou=
ting policy code in 2 years,
because we could reuse the community code.
Variable length communities started in 2002
https://tools.ietf.org/html/draft-lange-flexible-bgp-communities-00<https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scb=
fh0UjBXeMK-ndb3voDTXcWzoCI&r=3DhLt5iDJpw7ukqICc0hoT7A&m=3D2hIY6rLbAvAIj9fLY=
9vdCZMdoxjfktxXE0SPGa4SW9Y&s=3DRAOaw8LZr1xIkRNXO98NGuA1TlJ3QfiuPz4ecF7I8Wc&=
e=3D>
The code will have to be written from scratch.

Regards,
Jakob.

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> On Behalf Of =
Robert Raszuk
Sent: Thursday, July 19, 2018 4:21 PM
To: Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@pfrc.org>>
Cc: idr wg <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)


> If we must do fixed

I do not think we must do fixed. I see no reason to stick with fixed.

Experience has proven that fixed does not work .. we see this clear in the =
proposals being submitted and even presented at IDR. Time to learn from pas=
t mistakes.

Thx,
Robert


On Fri, Jul 20, 2018 at 1:11 AM, Jeffrey Haas <jhaas@pfrc.org<mailto:jhaas@=
pfrc.org>> wrote:
On Fri, Jul 20, 2018 at 12:52:44AM +0200, Robert Raszuk wrote:
> 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... insa=
ne
> - not only obvious but then you would need to get complex dealing with
> different/opposite filtering results from different RTCs SAFIs.

I would like to offer a very specific reductio ad absurdum:
I propose that the next version of communities we do, if they must be fixed
length, must be 253 octets of value and 255 bytes of total size.

If we must do fixed, do it and be done for a long while.

-- Jeff

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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">That&#8217;s t=
he same argument: you are seeking local optimization based on your position=
 in the ecosystem.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">But there are =
other positions.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Thanks for ack=
nowledging that your plan is to continue requesting additional fixed length=
 community attributes forever.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Regards,<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">--Bruno<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
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<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;"> Jakob He=
itz (jheitz) [mailto:jheitz@cisco.com]
<br>
<b>Sent:</b> Friday, July 20, 2018 11:03 AM<br>
<b>To:</b> DECRAENE Bruno IMT/OLN<br>
<b>Cc:</b> idr wg; Robert Raszuk; John Scudder<br>
<b>Subject:</b> RE: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">I'm going f=
or bang for the buck.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">There is no=
t enough bang for the buck in variable length communities.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">I cannot se=
e variable length communities ever being developed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">We will kee=
p squeezing the existing communities and when someone really needs an attri=
bute that won't fit into one or a set of communities, they
 will develop a new attribute.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><o:p>&nbsp;=
</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Regards,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Jakob.<o:p>=
</o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><o:p>&nbsp;=
</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span=
 lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&=
quot;sans-serif&quot;"> bruno.decraene@orange.com &lt;bruno.decraene@orange=
.com&gt;
<br>
<b>Sent:</b> Friday, July 20, 2018 7:16 AM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;jheitz@cisco.com&gt;<br>
<b>Cc:</b> idr wg &lt;idr@ietf.org&gt;; Robert Raszuk &lt;robert@raszuk.net=
&gt;; John Scudder &lt;jgs@juniper.net&gt;<br>
<b>Subject:</b> RE: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<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:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">1) I can see t=
hat from an implementer standpoint, in the short term, implementing one fix=
ed length community is easier than a variable length one.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">But the bigger=
 picture is the long term work for the whole community.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Hence the poin=
t is to compare, in the long run, one variable length community format to N=
 fixed length community formats. And evaluate the costs of
 specifying, implementing, testing, deploying, debugging, maintaining, oper=
ating (N sets of BGP policies)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">It&#8217;s cle=
ar that for N=3D255, one variable community format is better. I can&#8217;t=
 really imagine the nightmare with N=3D20.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Currently we h=
ave N=3D3, and two more propositions on the way. So this proposition is N=
=3D5 in the very short term.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Finally, IMO, =
the argument &#8220;I&#8217;m just asking for one more, it&#8217;s urgent&#=
8221; has been taken by the BGP large community attribute. Now we need to l=
ook at
 the big long term picture.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">2) Even for yo=
ur own use case, I would argue that a variable length would be a better fit=
..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">From the abstr=
act:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;">&#8220;&nbsp;&nbsp; Auto-=
derived identifiers are used by applications to enable zero<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;">&nbsp;&nbsp; configuratio=
n features.&nbsp; Such identifiers are often a combination of<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;">&nbsp;&nbsp; primitive id=
entifiers and are thus longer. &#8220;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">I think the se=
ntence is missing &#8220;and variable in length&#8221;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Regards,<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">--Bruno<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><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 #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<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;"> Idr [<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Friday, July 20, 2018 12:05 AM<br>
<b>To:</b> John Scudder<br>
<b>Cc:</b> idr wg; Robert Raszuk<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The thing i=
s I want to reuse the extended community code as much as possible.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The routing=
 policy code and its associated configuration, show, xml and debug commands=
 is the bulk of it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The more yo=
u deviate, the harder it gets.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Variable le=
ngth is a big deviation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><o:p>&nbsp;=
</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Regards,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Jakob.<o:p>=
</o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><o:p>&nbsp;=
</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span=
 lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&=
quot;sans-serif&quot;"> John Scudder &lt;<a href=3D"mailto:jgs@juniper.net"=
>jgs@juniper.net</a>&gt;
<br>
<b>Sent:</b> Thursday, July 19, 2018 8:53 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com">jhe=
itz@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net">robert@ra=
szuk.net</a>&gt;; Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@=
pfrc.org</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</=
a>&gt;<br>
<b>Subject:</b> Re: [Idr] Fixed sized communities (was Re: Questions on you=
r presentations ...)<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">(speaking as an individual WG c=
ontributor)
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I think it is a big mistake to =
suggest that the reason flexcomms/wide comms hasn't progressed is that it's=
 variable-length. It's much more ambitious than any of the fixed-length stu=
ff we have, that's a reason. It's recursive,
 that might be a reason too. But just because it's variable-length? Not buy=
ing it.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">$0.02,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">--John<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Jul 19, 2018, at 11:48 PM, J=
akob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz=3D40cisco.com@dmarc.ietf.o=
rg">jheitz=3D40cisco.com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Not at all.=
 Experience has shown that fixed works very well.</span><span lang=3D"EN-US=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Large commu=
nity went from concept to RFC and code complete with all the routing policy=
 code in 2 years,</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">because we =
could reuse the community code.</span><span lang=3D"EN-US"><o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Variable le=
ngth communities started in 2002</span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0"><a href=3D"=
https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_=
draft-2Dlange-2Dflexible-2Dbgp-2Dcommunities-2D00&amp;d=3DDwMGaQ&amp;c=3DHA=
kYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&am=
p;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DRAOaw8LZr1xIkRNXO=
98NGuA1TlJ3QfiuPz4ecF7I8Wc&amp;e=3D"><span style=3D"color:purple">https://t=
ools.ietf.org/html/draft-lange-flexible-bgp-communities-00</span></a></span=
><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">The code wi=
ll have to be written from scratch.</span><span lang=3D"EN-US"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">&nbsp;</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Regards,</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">Jakob.</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;,&quot;serif&quot;;color:#7030A0">&nbsp;</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span=
 class=3D"apple-converted-space"><span lang=3D"EN-US" style=3D"font-family:=
&quot;Calibri&quot;,&quot;sans-serif&quot;">&nbsp;</span></span><span lang=
=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;=
sans-serif&quot;">Idr
 &lt;<a href=3D"mailto:idr-bounces@ietf.org"><span style=3D"color:purple">i=
dr-bounces@ietf.org</span></a>&gt;<span class=3D"apple-converted-space">&nb=
sp;</span><b>On Behalf Of<span class=3D"apple-converted-space">&nbsp;</span=
></b>Robert Raszuk<br>
<b>Sent:</b><span class=3D"apple-converted-space">&nbsp;</span>Thursday, Ju=
ly 19, 2018 4:21 PM<br>
<b>To:</b><span class=3D"apple-converted-space">&nbsp;</span>Jeffrey Haas &=
lt;<a href=3D"mailto:jhaas@pfrc.org"><span style=3D"color:purple">jhaas@pfr=
c.org</span></a>&gt;<br>
<b>Cc:</b><span class=3D"apple-converted-space">&nbsp;</span>idr wg &lt;<a =
href=3D"mailto:idr@ietf.org"><span style=3D"color:purple">idr@ietf.org</spa=
n></a>&gt;<br>
<b>Subject:</b><span class=3D"apple-converted-space">&nbsp;</span>Re: [Idr]=
 Fixed sized communities (was Re: Questions on your presentations ...)</spa=
n><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.5pt;font-f=
amily:&quot;Arial&quot;,&quot;sans-serif&quot;;background:white">&gt; If we=
 must do fixed</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">I do not think we must do fixed. I see no r=
eason to stick with fixed.&nbsp;</span><span lang=3D"EN-US"><o:p></o:p></sp=
an></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">Experience has proven that fixed does not w=
ork .. we see this clear in the proposals being submitted and even presente=
d at IDR. Time to learn from past mistakes.&nbsp;</span><span lang=3D"EN-US=
"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">Thx,<br>
Robert</span><span lang=3D"EN-US"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;">&nbsp;</span><span lang=3D"EN-US"><o:p></o:=
p></span></p>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Fri, Jul 20, 2018 at 1:11 AM=
, Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org" target=3D"_blank"><spa=
n style=3D"color:purple">jhaas@pfrc.org</span></a>&gt; wrote:<o:p></o:p></s=
pan></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-=
bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Fri, Jul 20, 2018 at 12:52:4=
4AM &#43;0200, Robert Raszuk wrote:<br>
&gt; 4. New additional RTC SAFI for 30 octets XXXL ext communities is ... i=
nsane<br>
&gt; - not only obvious but then you would need to get complex dealing with=
<br>
&gt; different/opposite filtering results from different RTCs SAFIs.<br>
<br>
I would like to offer a very specific reductio ad absurdum:<br>
I propose that the next version of communities we do, if they must be fixed=
<br>
length, must be 253 octets of value and 255 bytes of total size.<br>
<br>
If we must do fixed, do it and be done for a long while.<br>
<br>
-- Jeff<br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org"><span style=3D"color:purple">Idr@ietf.org</=
span></a><br>
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org_mailman_listinfo_idr&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK=
-ndb3voDTXcWzoCI&amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9v=
dCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62=
w&amp;e=3D" target=3D"_blank"><span style=3D"color:purple">https://www.ietf=
...org/mailman/listinfo/idr</span></a><o:p></o:p></span></p>
</div>
</blockquote>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:9.0pt;font-f=
amily:&quot;Helvetica&quot;,&quot;sans-serif&quot;">_______________________=
________________________<br>
Idr mailing list<br>
</span><span lang=3D"EN-US"><a href=3D"mailto:Idr@ietf.org"><span style=3D"=
font-size:9.0pt;font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;;co=
lor:purple">Idr@ietf.org</span></a></span><span lang=3D"EN-US" style=3D"fon=
t-size:9.0pt;font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;"><br>
</span><span lang=3D"EN-US"><a href=3D"https://urldefense.proofpoint.com/v2=
/url?u=3Dhttps-3A__www.ietf.org_mailman_listinfo_idr&amp;d=3DDwICAg&amp;c=
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7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SPGa4SW9Y&amp;s=3DANHXDEVazzM1=
1nlzarMDH82yonWcxAhaK1ABXs_A62w&amp;e=3D"><span style=3D"font-size:9.0pt;fo=
nt-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;;color:purple">https:=
//urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailman_listi=
nfo_idr&amp;d=3DDwICAg&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&=
amp;r=3DhLt5iDJpw7ukqICc0hoT7A&amp;m=3D2hIY6rLbAvAIj9fLY9vdCZMdoxjfktxXE0SP=
Ga4SW9Y&amp;s=3DANHXDEVazzM11nlzarMDH82yonWcxAhaK1ABXs_A62w&amp;e=3D</span>=
</a><o:p></o:p></span></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">__________________________________________________________=
_______________________________________________________________<o:p></o:p><=
/span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">Ce message et ses pieces jointes peuvent contenir des info=
rmations confidentielles ou privilegiees et ne doivent donc<o:p></o:p></spa=
n></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">pas etre diffuses, exploites ou copies sans autorisation. =
Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></s=
pan></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">a l'expediteur et le detruire ainsi que les pieces jointes=
. Les messages electroniques etant susceptibles d'alteration,<o:p></o:p></s=
pan></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">Orange decline toute responsabilite si ce message a ete al=
tere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;"><o:p>&nbsp;</o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&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 style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">they should not be distributed, used or copied without aut=
horisation.<o:p></o:p></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">If you have received this email in error, please notify th=
e sender and delete this message and its attachments.<o:p></o:p></span></pr=
e>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,&q=
uot;serif&quot;">As emails may be altered, Orange is not liable for message=
s 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;,&q=
uot;serif&quot;">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>
</html>

--_000_53C29892C857584299CBF5D05346208A47AF963BOPEXCLILM21corp_--


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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: BGP Auto discovery - L2 liveliness??
Thread-Index: AQHUIEB01T6SLTc23kmf3spCW7QnGA==
Date: Fri, 20 Jul 2018 15:43:49 +0000
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Subject: [Idr] BGP Auto discovery - L2 liveliness??
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Could someone please explain - How is L2 liveliness important for auto-disc=
overy between 2 directly connected BGP neighbors (referring to the topology=
 shown yesterday)? Or is it really meant to benefit the peering relationshi=
p (once established) - bring down the peer if L2 fails or vice versa?

Or is it meant to benefit the (tenant/services) traffic (past bgp NLRI exch=
ange) ? Likely not, since  (tenant/services) traffic may be L3 (or MPLS), a=
nd L2 liveliness would not be sufficient (after all, L2 can be working, whi=
le L3 might not or MPLS might not).=20

Cheers,
Rajiv =20


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From: Jeffrey Haas <jhaas@pfrc.org>
To: bruno.decraene@orange.com
Cc: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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On Fri, Jul 20, 2018 at 03:29:36PM +0000, bruno.decraene@orange.com wrote:
> That's the same argument: you are seeking local optimization based on your position in the ecosystem.
> But there are other positions.
> Thanks for acknowledging that your plan is to continue requesting additional fixed length community attributes forever.

Indeed.

Contents of xxc draft:
type:subtype:v6:6
type:subtype:v4:18
type:subtype:as4:18
type:evpn subtype 4:as4:esi (10):MBZ(8)
type:evpn subtype 5:as4:esi (10):evi-rt (4): MBZ(4)
type:evpn subtype 6:as4:A+space(1):D-ID(1):service-id(16) (zero filled)

If the goal was the first three generics were intended to have similar
local-admin lengths, 6 would be the size instead of 6,18,18. (Large
community argument: uniformity.)

The evpn objects outright say they're reserving/wasting space.

I already get nag mail from operators about "how many of X can I put in the
packet".  I'd really like to keep things compact.

-- Jeff


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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: Susan Hares <shares@ndzh.com>
CC: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, John Scudder <jgs@juniper.net>, idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>
Thread-Topic: BGP-LS vs gRPC/gpb or...
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Date: Fri, 20 Jul 2018 16:05:55 +0000
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Subject: [Idr] BGP-LS vs gRPC/gpb or...
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--_000_B32A3D4F29A543728B8C21B3EB043254ciscocom_--


From nobody Fri Jul 20 09:16:23 2018
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From: Jeffrey Haas <jhaas@pfrc.org>
To: "Rajiv Asati (rajiva)" <rajiva=40cisco.com@dmarc.ietf.org>
Cc: Susan Hares <shares@ndzh.com>, "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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On Fri, Jul 20, 2018 at 04:05:55PM +0000, Rajiv Asati (rajiva) wrote:
> (Changed the subjust line)..
> 
> BGP-LS was proposed for todayâ€™s world.
> 
> Perhaps. But Given the growing usage of  more and more (streaming or not) telemetry data from every node in a pseudo real-time manner (using pick your favorite transport machinery - gRPC/Gpb, restconf/xml/yang, SNMP...etc), it is worth asking ourselves, whether BGP(-LS) is still the right vehicle for conveying IGP (and more) related info.
> 

One portion of BGP-LS was to be used by other routing mechanisms for
spanning IGP domains.  Putting your question a different way, "do I want to
use grpc to consume routing state necessary for multi IGP domain work?"

Not really.

I'm quite supportive of other access mechanisms for that data once you have
it.  grpc, yang/i2rs.

-- Jeff


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Subject: [Idr] Default Policy: Ovewritten LOCAL_PREF
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Dear all,

Just to follow up on my talk, before the daily job will grab back all my
attention.

IMO we need default policies that will process different kinds of signals
(GRSH, Leak detection, others) that must have support in the code of the
routing software.

At the same time, I have an uneasy feeling if default policy will silently
overwrite route map configuration. And at least one implementation of GRSH
already does it.

My idea is that instead of encoding processing of these signals inside
LOCAL_PREF (btw, loosing information) we may create route separation on top
of BGP decision process. This should avoid the need for applying default
policies after route maps, so there would be strict order 'default policy'
-> 'routing policy'.
-- 
| Alexander Azimov  | HLL l QRATOR
| tel.: +7 499 241 81 92
| mob.: +7 915 360 08 86
| skype: mitradir
| mailto: aa@qrator.net
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--0000000000002564a105717141a1
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<div dir=3D"ltr">Dear all,<div><br></div><div><div>Just to follow up on my =
talk, before the daily job will grab back all my attention.</div><div><br><=
/div><div>IMO we need default policies that will process different kinds of=
 signals (GRSH, Leak detection, others) that must have support in the code =
of the routing software.=C2=A0</div><div><br></div><div>At the same time, I=
 have an uneasy feeling if default policy will silently overwrite route map=
 configuration. And at least one implementation of GRSH already does it.=C2=
=A0</div><div><br></div><div>My idea is that instead of encoding processing=
 of these signals inside LOCAL_PREF (btw, loosing information) we may creat=
e route separation on top of BGP decision process. This should avoid the ne=
ed for applying default policies after route maps, so there would be strict=
 order &#39;default policy&#39; -&gt; &#39;routing policy&#39;.</div><div>-=
-=C2=A0<br></div><div class=3D"gmail_signature"><div dir=3D"ltr"><div style=
=3D"font-family:Helvetica;font-size:12px;border-collapse:collapse"><font co=
lor=3D"#999999">| Alexander Azimov =C2=A0| HLL l QRATOR</font></div><div st=
yle=3D"font-family:Helvetica;font-size:12px;border-collapse:collapse"><font=
 color=3D"#999999">| tel.: +7 499 241 81 92</font></div><div style=3D"font-=
family:Helvetica;font-size:12px;border-collapse:collapse"><font color=3D"#9=
99999">| mob.: +7 915 360 08 86</font></div><div style=3D"font-family:Helve=
tica;font-size:12px;border-collapse:collapse"><font color=3D"#999999">| sky=
pe: mitradir</font></div><div style=3D"font-family:Helvetica;font-size:12px=
;border-collapse:collapse"><font color=3D"#999999">| mailto:=C2=A0<a href=
=3D"mailto:aa@qrator.net" target=3D"_blank">aa@qrator.net</a></font></div><=
div style=3D"font-family:Helvetica;font-size:12px;border-collapse:collapse"=
><font color=3D"#999999">| visit:=C2=A0<a href=3D"http://www.qrator.net/" t=
arget=3D"_blank">www.qrator.net</a></font></div></div></div>
</div></div>

--0000000000002564a105717141a1--


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To: "Rajiv Asati (rajiva)" <rajiva@cisco.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: BGP Auto discovery - L2 liveliness??
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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
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CC: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>
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Date: Fri, 20 Jul 2018 19:20:46 +0200
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To: "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>, lsvr@ietf.org
Cc: "Rajiv Asati (rajiva)" <rajiva@cisco.com>, idr wg <idr@ietf.org>
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Subject: Re: [Idr] BGP Auto discovery - L2 liveliness??
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Acee,

I have a comment on this section 6 and subsequent section 5.2.2 of the
document you quoted:

Link Hello are proposed to detect the L2-L2.5-L3 liveness. Well there is a
lot of real life issues with link liveness appearing sporadically and only
at some specific packet sizes. The Hello of fixed size of 25 octets will
not detect it. A sweep size is a must.

That perhaps will not likely appear in p2p fiber - however if someone is
trying to use emulated L2 links as part of DC infra it may very well be the
case.

Thx,
R.



On Fri, Jul 20, 2018 at 7:02 PM, Acee Lindem (acee) <
acee=3D40cisco.com@dmarc.ietf.org> wrote:

> Hi Rajiv,
> This function is described in section 6 of https://www.ietf.org/id/draft-
> ymbk-lsvr-lsoe-01.txt. I guess you are questioned whether it should be a
> requirement of this mechanism.
>
> Thanks,
> Acee
>
> =EF=BB=BFOn 7/20/18, 11:43 AM, "Rajiv Asati (rajiva)" <rajiva@cisco.com> =
wrote:
>
>
>     Could someone please explain - How is L2 liveliness important for
> auto-discovery between 2 directly connected BGP neighbors (referring to t=
he
> topology shown yesterday)? Or is it really meant to benefit the peering
> relationship (once established) - bring down the peer if L2 fails or vice
> versa?
>
>     Or is it meant to benefit the (tenant/services) traffic (past bgp NLR=
I
> exchange) ? Likely not, since  (tenant/services) traffic may be L3 (or
> MPLS), and L2 liveliness would not be sufficient (after all, L2 can be
> working, while L3 might not or MPLS might not).
>
>     Cheers,
>     Rajiv
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Acee,</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">I have a comment on this s=
ection 6 and subsequent section 5.2.2 of the document you quoted:=C2=A0</di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small">Link Hello are proposed t=
o detect the L2-L2.5-L3 liveness. Well there is a lot of real life issues w=
ith link liveness appearing sporadically and only at some specific packet s=
izes. The Hello of fixed size of 25 octets will not detect it. A sweep size=
 is a must.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">That=
 perhaps will not likely appear in p2p fiber - however if someone is trying=
 to use emulated L2 links as part of DC infra it may very well be the case.=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">R.</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Jul =
20, 2018 at 7:02 PM, Acee Lindem (acee) <span dir=3D"ltr">&lt;<a href=3D"ma=
ilto:acee=3D40cisco.com@dmarc.ietf.org" target=3D"_blank">acee=3D40cisco.co=
m@dmarc.ietf.org</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote"=
 style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi=
 Rajiv, <br>
This function is described in section 6 of <a href=3D"https://www.ietf.org/=
id/draft-ymbk-lsvr-lsoe-01.txt" rel=3D"noreferrer" target=3D"_blank">https:=
//www.ietf.org/id/draft-<wbr>ymbk-lsvr-lsoe-01.txt</a>. I guess you are que=
stioned whether it should be a requirement of this mechanism. <br>
<br>
Thanks,<br>
Acee <br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
=EF=BB=BFOn 7/20/18, 11:43 AM, &quot;Rajiv Asati (rajiva)&quot; &lt;<a href=
=3D"mailto:rajiva@cisco.com">rajiva@cisco.com</a>&gt; wrote:<br>
<br>
<br>
=C2=A0 =C2=A0 Could someone please explain - How is L2 liveliness important=
 for auto-discovery between 2 directly connected BGP neighbors (referring t=
o the topology shown yesterday)? Or is it really meant to benefit the peeri=
ng relationship (once established) - bring down the peer if L2 fails or vic=
e versa?<br>
<br>
=C2=A0 =C2=A0 Or is it meant to benefit the (tenant/services) traffic (past=
 bgp NLRI exchange) ? Likely not, since=C2=A0 (tenant/services) traffic may=
 be L3 (or MPLS), and L2 liveliness would not be sufficient (after all, L2 =
can be working, while L3 might not or MPLS might not). <br>
<br>
=C2=A0 =C2=A0 Cheers,<br>
=C2=A0 =C2=A0 Rajiv=C2=A0 <br>
<br>
<br>
<br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
</div></div></blockquote></div><br></div></div>

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Date: Fri, 20 Jul 2018 13:25:45 -0400
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From: Randy Bush <randy@psg.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
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Subject: Re: [Idr] BGP Auto discovery - L2 liveliness??
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>     Could someone please explain - How is L2 liveliness important for
>     auto-discovery between 2 directly connected BGP neighbors
>     (referring to the topology shown yesterday)? Or is it really meant
>     to benefit the peering relationship (once established) - bring
>     down the peer if L2 fails or vice versa?

while i imagine it could be used for other things, bringing down L3
sesiosn when L2 goes down would seem a good idea.

randy


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Date: Fri, 20 Jul 2018 13:50:55 -0400
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From: Randy Bush <randy@psg.com>
To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
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References: <CA+b+ERkbN==4wzL0K4OqunaPyu0Bw6A3dfFUAu5-NLT35vCf6w@mail.gmail.com> <20180719231119.GB10999@pfrc.org> <CA+b+ER=7dU_odxoMYpq-pbKfp=h3xTu1Y9gEKoGy6caJLb19qA@mail.gmail.com> <3a8b0cff4cdf4968b950d5e43810602a@XCH-ALN-014.cisco.com> <ADAC260E-566A-4628-8F4C-C7DE401A5821@juniper.net> <5e8e2b88c99044d8bed2fffa38720532@XCH-ALN-014.cisco.com> <7422_1532096146_5B51EE91_7422_187_1_53C29892C857584299CBF5D05346208A47AF91DE@OPEXCLILM21.corporate.adroot.infra.ftgroup> <dc277cae8dee49de92985bcd9bba81fa@XCH-ALN-014.cisco.com>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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> I'm going for bang for the buck.
> There is not enough bang for the buck in variable length communities.

bang for whose buck?  maybe ask an operator or ten.

ranndy


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Subject: Re: [Idr] BGP Auto discovery - L2 liveliness??
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> Link Hello are proposed to detect the L2-L2.5-L3 liveness.

no.  only L2

you want above that, use bfd or whatever

randy


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Randy Bush <randy@psg.com>
CC: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, idr wg <idr@ietf.org>, Robert Raszuk <robert@raszuk.net>
Thread-Topic: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Date: Fri, 20 Jul 2018 18:06:40 +0000
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References: <CA+b+ERkbN==4wzL0K4OqunaPyu0Bw6A3dfFUAu5-NLT35vCf6w@mail.gmail.com> <20180719231119.GB10999@pfrc.org> <CA+b+ER=7dU_odxoMYpq-pbKfp=h3xTu1Y9gEKoGy6caJLb19qA@mail.gmail.com> <3a8b0cff4cdf4968b950d5e43810602a@XCH-ALN-014.cisco.com> <ADAC260E-566A-4628-8F4C-C7DE401A5821@juniper.net> <5e8e2b88c99044d8bed2fffa38720532@XCH-ALN-014.cisco.com> <7422_1532096146_5B51EE91_7422_187_1_53C29892C857584299CBF5D05346208A47AF91DE@OPEXCLILM21.corporate.adroot.infra.ftgroup> <dc277cae8dee49de92985bcd9bba81fa@XCH-ALN-014.cisco.com> <m236wdhk3k.wl-randy@psg.com>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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We went 16 years trying to make a variable length community and in all that=
 time nobody found a compelling enough case to make it actually happen.

Regards,
Jakob.


-----Original Message-----
From: Randy Bush <randy@psg.com>=20
Sent: Friday, July 20, 2018 10:51 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: bruno.decraene@orange.com; idr wg <idr@ietf.org>; Robert Raszuk <robert=
@raszuk.net>
Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your prese=
ntations ...)

> I'm going for bang for the buck.
> There is not enough bang for the buck in variable length communities.

bang for whose buck?  maybe ask an operator or ten.

ranndy


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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
CC: "idr@ietf.org" <idr@ietf.org>, Randy Bush <randy@psg.com>
Thread-Topic: BGP Auto discovery - L2 liveliness??
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From: Victor Kuarsingh <victor@jvknet.com>
Date: Fri, 20 Jul 2018 14:18:52 -0400
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Subject: [Idr] Use Case Question for draft-zhu-idr-bgp-ls-path-mtu-00
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WG,

To repeat my question / comment from today's WG session.

Prefix:  Operators who are likely to use SR and stack labels in a
manner which may exceed traditional MTU sizes, would also have full
control over their network, and would unlikely  maintain lower MTUs
which would necessitate the need for this extension.

>From my experience, few, if any, operators would knowingly
deploy/maintain networks which are not sized to allow for large MTU
flows across their networks (where SR stacking would occur).

Therefore my question is - do we have operators whom are asking for
this change given real needs? (or is this more of a theoretical
problem we need to solve)?  I ask this since in the practical sense,
any operator deploying SR would unlikely ignore MTU adjustments on
that same network (would seem like a design oversight).

regards,

Victor K


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From: Victor Kuarsingh <victor@jvknet.com>
Date: Fri, 20 Jul 2018 14:24:06 -0400
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To: Randy Bush <randy@psg.com>
Cc: Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, lsvr@ietf.org,  "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>
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Subject: Re: [Idr] BGP Auto discovery - L2 liveliness??
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Randy,

I would also (re)stress that keeping it only to L2 detection allows it
to be simple and scoped only to what we absolutely need.  It seems
like the intersection (standards) approach you discussed.

regards,

Victor K (LSVR hat off)

On Fri, Jul 20, 2018 at 1:52 PM, Randy Bush <randy@psg.com> wrote:
>> Link Hello are proposed to detect the L2-L2.5-L3 liveness.
>
> no.  only L2
>
> you want above that, use bfd or whatever
>
> randy
>
> _______________________________________________
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Subject: Re: [Idr] BGP Auto discovery - L2 liveliness??
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hi victor,

> I would also (re)stress that keeping it only to L2 detection allows it
> to be simple and scoped only to what we absolutely need.  It seems
> like the intersection (standards) approach you discussed.

'zactly

randy


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Date: Fri, 20 Jul 2018 14:44:26 -0400
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Jeffrey Haas <jhaas@pfrc.org>, "Rajiv Asati (rajiva)" <rajiva=40cisco.com@dmarc.ietf.org>
CC: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>
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Thread-Topic: [Idr] BGP-LS vs gRPC/gpb or...
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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+1

Not to forget operational side of things, BGP infra (RR's, etc) is already =
been deployed and in operations, which significantly reduces cost of introdu=
ction.

Using BGP for resource allocation and feedback is much more complicated top=
ic, there's a reason we have got configuration/applied/operational states in=
 configuration and management space, introducing of similar states in BGP wo=
uld be.... I'm yet to come up with a name :)

When it comes to streaming, especially when there's a constant stream of da=
ta/updates - gRPC looks like a very good choice=20

Cheers,
Jeff

=EF=BB=BFOn 7/20/18, 12:16, "Idr on behalf of Jeffrey Haas" <idr-bounces@ietf.org=
 on behalf of jhaas@pfrc.org> wrote:

    On Fri, Jul 20, 2018 at 04:05:55PM +0000, Rajiv Asati (rajiva) wrote:
    > (Changed the subjust line)..
    >=20
    > BGP-LS was proposed for today=E2=80=99s world.
    >=20
    > Perhaps. But Given the growing usage of  more and more (streaming or =
not) telemetry data from every node in a pseudo real-time manner (using pick=
 your favorite transport machinery - gRPC/Gpb, restconf/xml/yang, SNMP...etc=
), it is worth asking ourselves, whether BGP(-LS) is still the right vehicle=
 for conveying IGP (and more) related info.
    >=20
   =20
    One portion of BGP-LS was to be used by other routing mechanisms for
    spanning IGP domains.  Putting your question a different way, "do I wan=
t to
    use grpc to consume routing state necessary for multi IGP domain work?"
   =20
    Not really.
   =20
    I'm quite supportive of other access mechanisms for that data once you =
have
    it.  grpc, yang/i2rs.
   =20
    -- Jeff
   =20
    _______________________________________________
    Idr mailing list
    Idr@ietf.org
    https://www.ietf.org/mailman/listinfo/idr
   =20



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From: "Stone, Andrew (Nokia - CA/Ottawa)" <andrew.stone@nokia.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: capability discovery - draft-ietf-idr-segment-routing-te-policy
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Subject: [Idr] capability discovery - draft-ietf-idr-segment-routing-te-policy
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Jeffrey Haas <jhaas@pfrc.org>, "Rajiv Asati (rajiva)" <rajiva@cisco.com>
CC: Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>
Thread-Topic: [Idr] BGP-LS vs gRPC/gpb or...
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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Date: Fri, 20 Jul 2018 22:36:33 +0200
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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>, Jeffrey Haas <jhaas@pfrc.org>,  "Rajiv Asati (rajiva)" <rajiva@cisco.com>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/79dv2QFl-E84NSrcYJc-zBS59EY>
Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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So what is missing in telemetry streaming ?

Why can't we push LSDB and all zoo of extensions to go out via such
streaming instead of via BGP-LS ?

The Interdomain aspect is highly questionable ...

1. You do not exchange your LSDB with strangers
2. If your neighboring AS in yours or your friends streaming to them from
aggregation points seems pretty safe too.

Maybe is time to deprecate BGP-LS ?

Best,
R.


On Fri, Jul 20, 2018 at 10:01 PM, Jakob Heitz (jheitz) <jheitz@cisco.com>
wrote:

> BGP-LS is available. Model based Telemetry is available.
> SNMP is really bad, because it is pull based.
>
> Regards,
> Jakob.
>
>
> -----Original Message-----
> From: Jeff Tantsura <jefftant.ietf@gmail.com>
> Sent: Friday, July 20, 2018 11:44 AM
> To: Jeffrey Haas <jhaas@pfrc.org>; Rajiv Asati (rajiva) <rajiva@cisco.com=
>
> Cc: Jakob Heitz (jheitz) <jheitz@cisco.com>; Robert Raszuk <
> robert@raszuk.net>; Susan Hares <shares@ndzh.com>; idr wg <idr@ietf.org>
> Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
>
> +1
>
> Not to forget operational side of things, BGP infra (RR's, etc) is alread=
y
> been deployed and in operations, which significantly reduces cost of
> introduction.
>
> Using BGP for resource allocation and feedback is much more complicated
> topic, there's a reason we have got configuration/applied/operational
> states in configuration and management space, introducing of similar stat=
es
> in BGP would be.... I'm yet to come up with a name :)
>
> When it comes to streaming, especially when there's a constant stream of
> data/updates - gRPC looks like a very good choice
>
> Cheers,
> Jeff
>
> =EF=BB=BFOn 7/20/18, 12:16, "Idr on behalf of Jeffrey Haas" <idr-bounces@=
ietf.org
> on behalf of jhaas@pfrc.org> wrote:
>
>     On Fri, Jul 20, 2018 at 04:05:55PM +0000, Rajiv Asati (rajiva) wrote:
>     > (Changed the subjust line)..
>     >
>     > BGP-LS was proposed for today=E2=80=99s world.
>     >
>     > Perhaps. But Given the growing usage of  more and more (streaming o=
r
> not) telemetry data from every node in a pseudo real-time manner (using
> pick your favorite transport machinery - gRPC/Gpb, restconf/xml/yang,
> SNMP...etc), it is worth asking ourselves, whether BGP(-LS) is still the
> right vehicle for conveying IGP (and more) related info.
>     >
>
>     One portion of BGP-LS was to be used by other routing mechanisms for
>     spanning IGP domains.  Putting your question a different way, "do I
> want to
>     use grpc to consume routing state necessary for multi IGP domain work=
?"
>
>     Not really.
>
>     I'm quite supportive of other access mechanisms for that data once yo=
u
> have
>     it.  grpc, yang/i2rs.
>
>     -- Jeff
>
>     _______________________________________________
>     Idr mailing list
>     Idr@ietf.org
>     https://www.ietf.org/mailman/listinfo/idr
>
>
>
>

--00000000000063a3590571744082
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">So what is=
 missing in telemetry streaming ?=C2=A0</div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small">Why can&#39;t we push LSDB and all zoo of extensions to g=
o out via such streaming instead of via BGP-LS ?=C2=A0</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">The Interdomain aspect is highly questiona=
ble ...=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">1. You d=
o not exchange your LSDB with strangers=C2=A0</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">2. If=
 your neighboring AS in yours or your friends streaming to them from aggreg=
ation points seems pretty safe too.=C2=A0</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small">Maybe is time to deprecate BGP-LS ?=C2=A0</div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small">Best,<br>R.</div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">=
On Fri, Jul 20, 2018 at 10:01 PM, Jakob Heitz (jheitz) <span dir=3D"ltr">&l=
t;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">BGP-LS is available. =
Model based Telemetry is available.<br>
SNMP is really bad, because it is pull based.<br>
<br>
Regards,<br>
Jakob.<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
<br>
-----Original Message-----<br>
From: Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com">jefftant=
.ietf@gmail.com</a>&gt; <br>
Sent: Friday, July 20, 2018 11:44 AM<br>
To: Jeffrey Haas &lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@pfrc.org</a>&g=
t;; Rajiv Asati (rajiva) &lt;<a href=3D"mailto:rajiva@cisco.com">rajiva@cis=
co.com</a>&gt;<br>
Cc: Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cis=
co.com</a>&gt;; Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net">robe=
rt@raszuk.net</a>&gt;; Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">s=
hares@ndzh.com</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf=
.org</a>&gt;<br>
Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...<br>
<br>
+1<br>
<br>
Not to forget operational side of things, BGP infra (RR&#39;s, etc) is alre=
ady been deployed and in operations, which significantly reduces cost of in=
troduction.<br>
<br>
Using BGP for resource allocation and feedback is much more complicated top=
ic, there&#39;s a reason we have got configuration/applied/<wbr>operational=
 states in configuration and management space, introducing of similar state=
s in BGP would be.... I&#39;m yet to come up with a name :)<br>
<br>
When it comes to streaming, especially when there&#39;s a constant stream o=
f data/updates - gRPC looks like a very good choice <br>
<br>
Cheers,<br>
Jeff<br>
<br>
=EF=BB=BFOn 7/20/18, 12:16, &quot;Idr on behalf of Jeffrey Haas&quot; &lt;<=
a href=3D"mailto:idr-bounces@ietf.org">idr-bounces@ietf.org</a> on behalf o=
f <a href=3D"mailto:jhaas@pfrc.org">jhaas@pfrc.org</a>&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 On Fri, Jul 20, 2018 at 04:05:55PM +0000, Rajiv Asati (rajiva=
) wrote:<br>
=C2=A0 =C2=A0 &gt; (Changed the subjust line)..<br>
=C2=A0 =C2=A0 &gt; <br>
=C2=A0 =C2=A0 &gt; BGP-LS was proposed for today=E2=80=99s world.<br>
=C2=A0 =C2=A0 &gt; <br>
=C2=A0 =C2=A0 &gt; Perhaps. But Given the growing usage of=C2=A0 more and m=
ore (streaming or not) telemetry data from every node in a pseudo real-time=
 manner (using pick your favorite transport machinery - gRPC/Gpb, restconf/=
xml/yang, SNMP...etc), it is worth asking ourselves, whether BGP(-LS) is st=
ill the right vehicle for conveying IGP (and more) related info.<br>
=C2=A0 =C2=A0 &gt; <br>
<br>
=C2=A0 =C2=A0 One portion of BGP-LS was to be used by other routing mechani=
sms for<br>
=C2=A0 =C2=A0 spanning IGP domains.=C2=A0 Putting your question a different=
 way, &quot;do I want to<br>
=C2=A0 =C2=A0 use grpc to consume routing state necessary for multi IGP dom=
ain work?&quot;<br>
<br>
=C2=A0 =C2=A0 Not really.<br>
<br>
=C2=A0 =C2=A0 I&#39;m quite supportive of other access mechanisms for that =
data once you have<br>
=C2=A0 =C2=A0 it.=C2=A0 grpc, yang/i2rs.<br>
<br>
=C2=A0 =C2=A0 -- Jeff<br>
<br>
=C2=A0 =C2=A0 ______________________________<wbr>_________________<br>
=C2=A0 =C2=A0 Idr mailing list<br>
=C2=A0 =C2=A0 <a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
=C2=A0 =C2=A0 <a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"=
noreferrer" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/id=
r</a><br>
<br>
<br>
<br>
</div></div></blockquote></div><br></div>

--00000000000063a3590571744082--


From nobody Fri Jul 20 14:12:41 2018
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Date: Fri, 20 Jul 2018 17:12:34 -0400
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From: Randy Bush <randy@psg.com>
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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> SNMP is really bad, because it is pull based.

it may be horrible, but your customers have very large infrastructure to
pull, digest, and manange those data.

randy


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Date: Fri, 20 Jul 2018 17:14:40 -0400
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From: Randy Bush <randy@psg.com>
To: Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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> Maybe is time to deprecate BGP-LS ?

gawd no!  we would have to invent another layer to use to generate 432
interent-drafts  </snark>

randy


From nobody Fri Jul 20 14:40:00 2018
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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Fri, 20 Jul 2018 17:39:53 -0400
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To: Randy Bush <randy@psg.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/ijrNwULyj6YNBLMEE76cZAQdgKM>
Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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IAB was quite clear on the direction wrt network management.

Regards,
Jeff

On Jul 20, 2018, at 17:12, Randy Bush <randy@psg.com> wrote:

>> SNMP is really bad, because it is pull based.
> 
> it may be horrible, but your customers have very large infrastructure to
> pull, digest, and manange those data.
> 
> randy
> 
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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From: Robert Raszuk <robert@raszuk.net>
Date: Sat, 21 Jul 2018 00:24:01 +0200
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To: Jeff Tantsura <jefftant.ietf@gmail.com>
Cc: Randy Bush <randy@psg.com>,  "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>, idr wg <idr@ietf.org>
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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Jeff,

Could you share:

* What is the IAB's definition of network management - does monitoring IGP
which now has fallen under BGP-LS is in scope of it ?

* Is there any pointer to document on what is IAB's quite clear position on
the above ?

Thx,
R.


On Fri, Jul 20, 2018 at 11:39 PM, Jeff Tantsura <jefftant.ietf@gmail.com>
wrote:

> IAB was quite clear on the direction wrt network management.
>
> Regards,
> Jeff
>
> On Jul 20, 2018, at 17:12, Randy Bush <randy@psg.com> wrote:
>
> >> SNMP is really bad, because it is pull based.
> >
> > it may be horrible, but your customers have very large infrastructure to
> > pull, digest, and manange those data.
> >
> > randy
> >
> > _______________________________________________
> > Idr mailing list
> > Idr@ietf.org
> > https://www.ietf.org/mailman/listinfo/idr
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Jeff,</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small">Could you share:</div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small">* What is the IAB&#39;s definition of network management - d=
oes monitoring IGP which now has fallen under BGP-LS is in scope of it ?=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">* Is there any poi=
nter to document on what is IAB&#39;s quite clear position on the above ?</=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small">Thx,</div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">R.</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><br></div></div><div class=3D"gmail_extra"=
><br><div class=3D"gmail_quote">On Fri, Jul 20, 2018 at 11:39 PM, Jeff Tant=
sura <span dir=3D"ltr">&lt;<a href=3D"mailto:jefftant.ietf@gmail.com" targe=
t=3D"_blank">jefftant.ietf@gmail.com</a>&gt;</span> wrote:<br><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;=
padding-left:1ex">IAB was quite clear on the direction wrt network manageme=
nt.<br>
<br>
Regards,<br>
Jeff<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
On Jul 20, 2018, at 17:12, Randy Bush &lt;<a href=3D"mailto:randy@psg.com">=
randy@psg.com</a>&gt; wrote:<br>
<br>
&gt;&gt; SNMP is really bad, because it is pull based.<br>
&gt; <br>
&gt; it may be horrible, but your customers have very large infrastructure =
to<br>
&gt; pull, digest, and manange those data.<br>
&gt; <br>
&gt; randy<br>
&gt; <br>
&gt; ______________________________<wbr>_________________<br>
&gt; Idr mailing list<br>
&gt; <a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
</div></div></blockquote></div><br></div>

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References: <CA+b+ERkbN==4wzL0K4OqunaPyu0Bw6A3dfFUAu5-NLT35vCf6w@mail.gmail.com> <20180719231119.GB10999@pfrc.org> <CA+b+ER=7dU_odxoMYpq-pbKfp=h3xTu1Y9gEKoGy6caJLb19qA@mail.gmail.com> <3a8b0cff4cdf4968b950d5e43810602a@XCH-ALN-014.cisco.com> <ADAC260E-566A-4628-8F4C-C7DE401A5821@juniper.net> <5e8e2b88c99044d8bed2fffa38720532@XCH-ALN-014.cisco.com> <7422_1532096146_5B51EE91_7422_187_1_53C29892C857584299CBF5D05346208A47AF91DE@OPEXCLILM21.corporate.adroot.infra.ftgroup> <dc277cae8dee49de92985bcd9bba81fa@XCH-ALN-014.cisco.com> <20474_1532100577_5B51FFE1_20474_202_1_53C29892C857584299CBF5D05346208A47AF963B@OPEXCLILM21.corporate.adroot.infra.ftgroup> <20180720160328.GC10999@pfrc.org>
In-Reply-To: <20180720160328.GC10999@pfrc.org>
From: Brian Dickson <brian.peter.dickson@gmail.com>
Date: Fri, 20 Jul 2018 18:02:14 -0700
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: Bruno Decraene <bruno.decraene@orange.com>, IETF IDR <idr@ietf.org>,  Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] Fixed sized communities (was Re: Questions on your presentations ...)
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Apologies for the top-reply; I'll try to keep things as brief as possible.

A lot can be learned from the transition from 16-bit ASNs to 32-bit ASNs.
(It "helped" in that circumstance that it was absolutely necessary, and
drove implementation/adoption.)

What is there to learn? AS4 vs AS2 required backward compatibility, while
avoiding downgrading all AS4 speakers, and breaking AS4 loop detection. The
compatibility mechanism will continue to be required until the last
AS2-only speaker is eliminated from the Internet.

Moving to variable-length communities, of any sort, will similarly require
compatibility modes, in exactly the same way, for exactly the same duration.

What this means to me is the following:

   1. Until wide (near-universal) implementation, and wide (significant)
   deployment of variable-length community speakers, there will continue to be
   an absolute requirement that new community types be added the current way
   (fixed-length).
   2. Anyone who feels the long-term move to variable-length communities,
   is urged to standardize, and/or implement, and/or deploy, variable-length
   communities.
   3. The market necessarily will dictate when (if ever) it is appropriate
   to switch new communities to variable-length implementations only.
   4. Until that happens, under no circumstances is it going to be
   acceptable from the operator community, to block the standardization,
   implementation, and operation, of fixed-size communities.
   5. If variable-length happens, there will still be a need for legacy
   support for already-deployed fixed-size, until sufficient "critical mass"
   is reached, meaning there may be a (long) period of compatibility mode
   between variable-length speakers where they pass both variable-length and
   legacy fixed-length communities for exactly the same community types.
   6. (It may be worth looking into the DNS community vs email community,
   and the TXT vs SPF debacle to comprehend both the "camps" mentality, and
   the danger of trying to use a unified field and overloading it to death.
   For those interested in sausage making and its outcomes, just look at the
   TXT records for any domain name, for how messy things can get.)
   7. Most of the concern on total size of communities due to multiple
   types being used simultaneously, is probably misplaced, IMHO, as it is very
   likely that only a subset of community types are ever appropriate to use on
   a given update message. Someone with a need for "large" pretty much, by
   definition, won't be using "standard" for all of their updates to all peers
   (including "large" speakers), with the possible exception of WKC that don't
   yet have "large" counterparts. Ditto IPv6 vs IPv4, and the need for an IPv8
   type is probably a long way off.
   8. The point of this is, there is no need to block either group's
   efforts. Indeed, both camps should (must) continue, until both have working
   deployed implementations. I'm happy to explain privately to anyone who
   doesn't agree or understand, and I think we may have reached the dead-horse
   flogging point.

I hope this is a positive contribution, and apologies if this wasn't as
brief as it should have been.

Brian

On Fri, Jul 20, 2018 at 9:03 AM Jeffrey Haas <jhaas@pfrc.org> wrote:

> On Fri, Jul 20, 2018 at 03:29:36PM +0000, bruno.decraene@orange.com wrote:
> > That's the same argument: you are seeking local optimization based on
> your position in the ecosystem.
> > But there are other positions.
> > Thanks for acknowledging that your plan is to continue requesting
> additional fixed length community attributes forever.
>
> Indeed.
>
> Contents of xxc draft:
> type:subtype:v6:6
> type:subtype:v4:18
> type:subtype:as4:18
> type:evpn subtype 4:as4:esi (10):MBZ(8)
> type:evpn subtype 5:as4:esi (10):evi-rt (4): MBZ(4)
> type:evpn subtype 6:as4:A+space(1):D-ID(1):service-id(16) (zero filled)
>
> If the goal was the first three generics were intended to have similar
> local-admin lengths, 6 would be the size instead of 6,18,18. (Large
> community argument: uniformity.)
>
> The evpn objects outright say they're reserving/wasting space.
>
> I already get nag mail from operators about "how many of X can I put in the
> packet".  I'd really like to keep things compact.
>
> -- Jeff
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

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<div dir=3D"ltr">Apologies for the top-reply; I&#39;ll try to keep things a=
s brief as possible.<div><br></div><div>A lot can be learned from the trans=
ition from 16-bit ASNs to 32-bit ASNs. (It &quot;helped&quot; in that circu=
mstance that it was absolutely necessary, and drove implementation/adoption=
.)</div><div><br></div><div>What is there to learn? AS4 vs AS2 required bac=
kward compatibility, while avoiding downgrading all AS4 speakers, and break=
ing AS4 loop detection. The compatibility mechanism will continue to be req=
uired until the last AS2-only speaker is eliminated from the Internet.</div=
><div><br></div><div>Moving to variable-length communities, of any sort, wi=
ll similarly require compatibility modes, in exactly the same way, for exac=
tly the same duration.</div><div><br></div><div>What this means to me is th=
e following:</div><div><ol><li>Until wide (near-universal) implementation, =
and wide (significant) deployment of variable-length community speakers, th=
ere will continue to be an absolute requirement that new community types be=
 added the current way (fixed-length).</li><li>Anyone who feels the long-te=
rm move to variable-length communities, is urged to standardize, and/or imp=
lement, and/or deploy, variable-length communities.</li><li>The market nece=
ssarily will dictate when (if ever) it is appropriate to switch new communi=
ties to variable-length implementations only.</li><li>Until that happens, u=
nder no circumstances is it going to be acceptable from the operator commun=
ity, to block the standardization, implementation, and operation, of fixed-=
size communities.</li><li>If variable-length happens, there will still be a=
 need for legacy support for already-deployed fixed-size, until sufficient =
&quot;critical mass&quot; is reached, meaning there may be a (long) period =
of compatibility mode between variable-length speakers where they pass both=
 variable-length and legacy fixed-length communities for exactly the same c=
ommunity types.</li><li>(It may be worth looking into the DNS community vs =
email community, and the TXT vs SPF debacle to comprehend both the &quot;ca=
mps&quot; mentality, and the danger of trying to use a unified field and ov=
erloading it to death. For those interested in sausage making and its outco=
mes, just look at the TXT records for any domain name, for how messy things=
 can get.)</li><li>Most of the concern on total size of communities due to =
multiple types being used simultaneously, is probably misplaced, IMHO, as i=
t is very likely that only a subset of community types are ever appropriate=
 to use on a given update message. Someone with a need for &quot;large&quot=
; pretty much, by definition, won&#39;t be using &quot;standard&quot; for a=
ll of their updates to all peers (including &quot;large&quot; speakers), wi=
th the possible exception of WKC that don&#39;t yet have &quot;large&quot; =
counterparts. Ditto IPv6 vs IPv4, and the need for an IPv8 type is probably=
 a long way off.</li><li>The point of this is, there is no need to block ei=
ther group&#39;s efforts. Indeed, both camps should (must) continue, until =
both have working deployed implementations. I&#39;m happy to explain privat=
ely to anyone who doesn&#39;t agree or understand, and I think we may have =
reached the dead-horse flogging point.</li></ol><div>I hope this is a posit=
ive contribution, and apologies if this wasn&#39;t as brief as it should ha=
ve been.</div></div><div><br></div><div>Brian</div></div><br><div class=3D"=
gmail_quote"><div dir=3D"ltr">On Fri, Jul 20, 2018 at 9:03 AM Jeffrey Haas =
&lt;<a href=3D"mailto:jhaas@pfrc.org">jhaas@pfrc.org</a>&gt; wrote:<br></di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex">On Fri, Jul 20, 2018 at 03:29:36PM +0000, =
<a href=3D"mailto:bruno.decraene@orange.com" target=3D"_blank">bruno.decrae=
ne@orange.com</a> wrote:<br>
&gt; That&#39;s the same argument: you are seeking local optimization based=
 on your position in the ecosystem.<br>
&gt; But there are other positions.<br>
&gt; Thanks for acknowledging that your plan is to continue requesting addi=
tional fixed length community attributes forever.<br>
<br>
Indeed.<br>
<br>
Contents of xxc draft:<br>
type:subtype:v6:6<br>
type:subtype:v4:18<br>
type:subtype:as4:18<br>
type:evpn subtype 4:as4:esi (10):MBZ(8)<br>
type:evpn subtype 5:as4:esi (10):evi-rt (4): MBZ(4)<br>
type:evpn subtype 6:as4:A+space(1):D-ID(1):service-id(16) (zero filled)<br>
<br>
If the goal was the first three generics were intended to have similar<br>
local-admin lengths, 6 would be the size instead of 6,18,18. (Large<br>
community argument: uniformity.)<br>
<br>
The evpn objects outright say they&#39;re reserving/wasting space.<br>
<br>
I already get nag mail from operators about &quot;how many of X can I put i=
n the<br>
packet&quot;.=C2=A0 I&#39;d really like to keep things compact.<br>
<br>
-- Jeff<br>
<br>
_______________________________________________<br>
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Randy Bush <randy@psg.com>
CC: idr wg <idr@ietf.org>
Thread-Topic: [Idr] BGP-LS vs gRPC/gpb or...
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And they open large horrible bugs against it, which is why telemetry was in=
vented.=20

Regards,
Jakob.

On Jul 20, 2018, at 5:12 PM, Randy Bush <randy@psg.com> wrote:

>> SNMP is really bad, because it is pull based.
>=20
> it may be horrible, but your customers have very large infrastructure to
> pull, digest, and manange those data.
>=20
> randy


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From: "UTTARO, JAMES" <ju1738@att.com>
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From: Gaurav Dawra <gdawra.ietf@gmail.com>
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In-Reply-To: <B17A6910EEDD1F45980687268941550F367849B7@MISOUT7MSGUSRCD.ITServices.sbc.com>
Date: Fri, 20 Jul 2018 22:38:01 -0400
Cc: Susan Hares <shares@ndzh.com>, =?utf-8?B?IuW+kOWwj+iZjijkuYnlhYgpIg==?= <xiaohu.xxh@alibaba-inc.com>, Idr <idr-bounces@ietf.org>, idr <idr@ietf.org>, draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscovery@ietf.org>
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To: "UTTARO, JAMES" <ju1738@att.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/7pa3iqaIp-8kZqwNXCr6pSkRe9Q>
Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
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+1

Sent from my iPhone

> On Jul 20, 2018, at 9:52 AM, UTTARO, JAMES <ju1738@att.com> wrote:
>=20
> +1
> =20
> Jim Uttaro
> =20
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
> Sent: Friday, July 20, 2018 7:18 AM
> To: '=E5=BE=90=E5=B0=8F=E8=99=8E(=E4=B9=89=E5=85=88)' <xiaohu.xxh@alibaba-=
inc.com>; 'Idr' <idr-bounces@ietf.org>; 'idr' <idr@ietf.org>
> Cc: 'draft-xu-idr-neighbor-autodiscovery' <draft-xu-idr-neighbor-autodisco=
very@ietf.org>
> Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
> =20
> Xiaohu:
> =20
> Our next step is to gather requirements for the IDR neighbor discovery fro=
m the WG.  We would especially be interested in feedback on requirements fro=
m operators of data centers.  If you know of an operators of medium data cen=
ters who could send requirements to the IDR chairs or the IDR list, it would=
 be helpful.
> =20
> Cheerily, Susan Hares
> =20
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of ???(??)
> Sent: Friday, July 20, 2018 7:12 AM
> To: Idr; idr
> Cc: draft-xu-idr-neighbor-autodiscovery
> Subject: Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscover=
y
> =20
> =20
> Hi Sue,
> =20
> Thanks for launching the WG adoption call for draft-xu-idr-neighbor-autodi=
scovery.
> =20
> Hi all,
> =20
> There has been one implementation developed by a switch vendor. Furthermor=
e at least two additional implementations from other vendors are under const=
ruction. If any of you have any concrete and technical concerns on this mech=
anism, please feel free to tell us and we would like to verify your concerns=
 on the implementation and then give you feedbacks.
> =20
> Best regards,
> Xiaohu
> ------------------------------------------------------------------
> From:Susan Hares <shares@ndzh.com>
> Send Time:2018=E5=B9=B47=E6=9C=8819=E6=97=A5(=E6=98=9F=E6=9C=9F=E5=9B=9B) 1=
7:59
> To:idr <idr@ietf.org>
> Cc:draft-xu-idr-neighbor-autodiscovery <draft-xu-idr-neighbor-autodiscover=
y@ietf.org>
> Subject:Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery=

> =20
> This closes the 2 week adoption for draft-xu-idr-neighbor-autodiscovery
> (July 2 =E2=80=93 July 16).
> =20
> The WG chairs conclude on my original questions that:
> 1)  There is WG interest to have an auto-discovery mechanism
> that will work for BGP peers in Data Centers
> =20
> 2)  There is some WG  interest having this work
> in other deployments.
> =20
> 3)  There is no consensus on the mechanisms
> (BGP hellos or other mechanisms)=20
> Or requirements for the mechanisms.
> =20
> 4)  There is WG consensus and AD Consensus that we should
> collaborate with LSVR. One mechanism for both would
> be good, but it needs to fit the requirements set
> by the WG. =20
> =20
> There is no consensus on adoption this draft.
> =20
> During today=E2=80=99s IDR session (18:10-19:10), we will have a
> discussion on the requirements for the auto-discovery mechanisms.
> We will start by reviewing the LSVR requirement set.
> =20
> If our discussions today do not come to a clear conclusion,
> the chairs are willing to sponsor an interim on the topic.
> =20
> Susan Hares and John Scudder.
> =20
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Susan Hares
> Sent: Monday, July 2, 2018 1:09 PM
> To: idr@ietf.org
> Cc: draft-xu-idr-neighbor-autodiscovery@ietf.org
> Subject: [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscovery
> =20
> Greetings:
> =20
> This begins a 2 week WG adoption call for draft-xu-idr-neighbor-autodiscov=
ery (July 2 =E2=80=93 July 16).=20
> =20
> https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autodiscovery/
> =20
> The authors of this draft should send their IPR statements in response to t=
his email.  I hope the authors will ihelp their vacationing co-authors to re=
spond by July 7th.=20
> =20
> The WG should consider the following:
> 1)      Does BGP need to have an autodiscovery mechanism for peers within D=
ata Centers?
> 2)      Does this mechanism work for other deployments?
> =20
> 3)      If so, should be passed in BGP Hello message?=20
> Or should it be a part of another protocol (e.g. LLDP, BFD, etc).
> =20
> 4)      Does this interact with any of the LSVR work?
> =20
> I want to thank the authors for their patience while we sorted through som=
e of the WG LC for other drafts.  We decided to wait until some of those dis=
cussion were cleared up prior to starting a new WG Adoption call.
> =20
> =20
> Susan Hares
> =20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">+1<br><br><div id=3D"AppleMailSignature">Se=
nt from my iPhone</div><div><br>On Jul 20, 2018, at 9:52 AM, UTTARO, JAMES &=
lt;<a href=3D"mailto:ju1738@att.com">ju1738@att.com</a>&gt; wrote:<br><br></=
div><blockquote type=3D"cite"><div>

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><b><i><span style=3D"color:#44546A;mso-fareast-langua=
ge:EN-US">+1<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"color:#44546A;mso-fareast-langua=
ge:EN-US"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"color:#44546A;mso-fareast-langua=
ge:EN-US">Jim Uttaro<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"color:#44546A;mso-fareast-langua=
ge:EN-US"><o:p>&nbsp;</o:p></span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0=
in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:EN-US">From:</=
span></b><span style=3D"mso-fareast-language:EN-US"> Idr [<a href=3D"mailto:=
idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Susan Hares<br>
<b>Sent:</b> Friday, July 20, 2018 7:18 AM<br>
<b>To:</b> '</span><span style=3D"font-family:&quot;MS Gothic&quot;;mso-fare=
ast-language:EN-US">=E5=BE=90=E5=B0=8F=E8=99=8E</span><span style=3D"mso-far=
east-language:EN-US">(</span><span style=3D"font-family:&quot;Microsoft Jhen=
gHei&quot;,sans-serif;mso-fareast-language:EN-US">=E4=B9=89=E5=85=88</span><=
span style=3D"mso-fareast-language:EN-US">)'
 &lt;<a href=3D"mailto:xiaohu.xxh@alibaba-inc.com">xiaohu.xxh@alibaba-inc.co=
m</a>&gt;; 'Idr' &lt;<a href=3D"mailto:idr-bounces@ietf.org">idr-bounces@iet=
f.org</a>&gt;; 'idr' &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt=
;<br>
<b>Cc:</b> 'draft-xu-idr-neighbor-autodiscovery' &lt;<a href=3D"mailto:draft=
-xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-idr-neighbor-autodiscovery=
@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodis=
covery<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Xiaohu:<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Our next step is to gat=
her requirements for the IDR neighbor discovery from the WG. &nbsp;We would e=
specially be interested in feedback on requirements from operators of data c=
enters.&nbsp; If you know of an operators
 of medium data centers who could send requirements to the IDR chairs or the=
 IDR list, it would be helpful.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cheerily, Susan Hares <=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span=
></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot;=
Tahoma&quot;,sans-serif;mso-fareast-language:EN-US">From:</span></b><span st=
yle=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;mso-fareas=
t-language:EN-US"> Idr [<a href=3D"mailto:idr-bounces@ietf.org">mailto:idr-b=
ounces@ietf.org</a>]
<b>On Behalf Of </b>???(??)<br>
<b>Sent:</b> Friday, July 20, 2018 7:12 AM<br>
<b>To:</b> Idr; idr<br>
<b>Cc:</b> draft-xu-idr-neighbor-autodiscovery<br>
<b>Subject:</b> Re: [Idr] WG adoption call for draft-xu-idr-neighbor-autodis=
covery<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Hi Sue,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Thanks for launching the WG adoption call f=
or&nbsp;<span style=3D"background:white">draft-xu-idr-neighbor-autodiscovery=
.</span><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Hi all,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">There has been one implementation develope=
d by a switch vendor. Furthermore at least two additional implementations fr=
om other vendors&nbsp;are under construction. If
 any of you have any concrete and technical&nbsp;concerns on this mechanism,=
 please feel free to&nbsp;tell us and we would like to verify your&nbsp;conc=
erns on the implementation and then give you feedbacks.<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Best regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Xiaohu<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">------------------------------------------=
------------------------<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">From:Susan Hares &lt;<a href=3D"mailto:sha=
res@ndzh.com">shares@ndzh.com</a>&gt;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Send Time:2018</span><span lang=3D"ZH-CN" s=
tyle=3D"font-size:10.5pt;font-family:&quot;MS Gothic&quot;;color:black">=E5=B9=
=B4</span><span style=3D"font-size:10.5pt;font-family:&quot;Tahoma&quot;,san=
s-serif;color:black">7</span><span lang=3D"ZH-CN" style=3D"font-size:10.5pt;=
font-family:&quot;MS Gothic&quot;;color:black">=E6=9C=88</span><span style=3D=
"font-size:10.5pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">19<=
/span><span lang=3D"ZH-CN" style=3D"font-size:10.5pt;font-family:&quot;MS Go=
thic&quot;;color:black">=E6=97=A5</span><span style=3D"font-size:10.5pt;font=
-family:&quot;Tahoma&quot;,sans-serif;color:black">(</span><span lang=3D"ZH-=
CN" style=3D"font-size:10.5pt;font-family:&quot;MS Gothic&quot;;color:black"=
>=E6=98=9F=E6=9C=9F=E5=9B=9B</span><span style=3D"font-size:10.5pt;font-fami=
ly:&quot;Tahoma&quot;,sans-serif;color:black">)
 17:59<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">To:idr &lt;<a href=3D"mailto:idr@ietf.org"=
>idr@ietf.org</a>&gt;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Cc:draft-xu-idr-neighbor-autodiscovery &lt=
;<a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">draft-xu-id=
r-neighbor-autodiscovery@ietf.org</a>&gt;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black">Subject:Re: [Idr] WG adoption call for dra=
ft-xu-idr-neighbor-autodiscovery<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Tah=
oma&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">This closes the 2 week adoption for draft-xu-idr-neighbor-autod=
iscovery</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">(July 2 =E2=80=93 July 16).
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>=

<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">The WG chairs conclude on my original questions that:
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"fon=
t-family:&quot;Courier New&quot;;color:#1F497D">1)</span><span style=3D"font=
-size:7.0pt;font-family:&quot;Times New Roman&quot;,serif;color:#1F497D">&nb=
sp;
</span><span style=3D"font-family:&quot;Courier New&quot;;color:#1F497D">The=
re is WG interest to have an auto-discovery mechanism
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">that will work for BGP peers in Data Centers</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></sp=
an></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"fon=
t-family:&quot;Courier New&quot;;color:#1F497D">2)</span><span style=3D"font=
-size:7.0pt;font-family:&quot;Times New Roman&quot;,serif;color:#1F497D">&nb=
sp;
</span><span style=3D"font-family:&quot;Courier New&quot;;color:#1F497D">The=
re is some WG &nbsp;interest having this work</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">in other deployments.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></sp=
an></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"fon=
t-family:&quot;Courier New&quot;;color:#1F497D">3)</span><span style=3D"font=
-size:7.0pt;font-family:&quot;Times New Roman&quot;,serif;color:#1F497D">&nb=
sp;
</span><span style=3D"font-family:&quot;Courier New&quot;;color:#1F497D">The=
re is no consensus on the mechanisms
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">(BGP hellos or other mechanisms)
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">Or requirements for the mechanisms.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>=

<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"fon=
t-family:&quot;Courier New&quot;;color:#1F497D">4)</span><span style=3D"font=
-size:7.0pt;font-family:&quot;Times New Roman&quot;,serif;color:#1F497D">&nb=
sp;
</span><span style=3D"font-family:&quot;Courier New&quot;;color:#1F497D">The=
re is WG consensus and AD Consensus that we should
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">collaborate with LSVR. One mechanism for both would
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">be good, but it needs to fit the requirements set</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"font-family:&quot;Courier New&q=
uot;;color:#1F497D">by the WG. &nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>=

<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">There is no consensus on adoption this draft.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>=

<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">During today=E2=80=99s IDR session (18:10-19:10), we will have a=

</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">discussion on the requirements for the auto-discovery mechanism=
s.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">We will start by reviewing the LSVR requirement set.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>=

<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">If our discussions today do not come to a clear conclusion,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">the chairs are willing to sponsor an interim on the topic.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>=

<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;co=
lor:#1F497D">Susan Hares and John Scudder.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:0in 0in 0in=
 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot;=
Tahoma&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> Idr [<a hre=
f=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Susan Hares<br>
<b>Sent:</b> Monday, July 2, 2018 1:09 PM<br>
<b>To:</b> <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:draft-xu-idr-neighbor-autodiscovery@ietf.org">d=
raft-xu-idr-neighbor-autodiscovery@ietf.org</a><br>
<b>Subject:</b> [Idr] WG adoption call for draft-xu-idr-neighbor-autodiscove=
ry</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">Greetings: <o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">This begins a 2 week WG a=
doption call for draft-xu-idr-neighbor-autodiscovery (July 2 =E2=80=93 July 1=
6).&nbsp;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"https://urldef=
ense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.org_doc_draft-2Dxu=
-2Didr-2Dneighbor-2Dautodiscovery_&amp;d=3DDwMFaQ&amp;c=3DLFYZ-o9_HUMeMTSQic=
vjIg&amp;r=3Ds7ZzB4JbPv3nYuoSx5Gy8Q&amp;m=3DZl4EhcjPSHqLNyNtcJo-FqroUcnSMXFT=
-gveWTjkE8E&amp;s=3DvYX0R4Lrw-6SDQVv7X44vg0k4CwPipSP04k3ctQLLv8&amp;e=3D" ta=
rget=3D"_blank">https://datatracker.ietf.org/doc/draft-xu-idr-neighbor-autod=
iscovery/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">The authors of this draft=
 should send their IPR statements in response to this email. &nbsp;I hope th=
e authors will ihelp their vacationing co-authors to respond by July 7<sup>t=
h</sup>.&nbsp;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">The WG should consider th=
e following:
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"col=
or:black">1)</span><span style=3D"font-size:7.0pt;font-family:&quot;Times Ne=
w Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"color:black">Does BGP need to have an autodiscovery me=
chanism for peers within Data Centers?
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"col=
or:black">2)</span><span style=3D"font-size:7.0pt;font-family:&quot;Times Ne=
w Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"color:black">Does this mechanism work for other deploy=
ments? <o:p>
</o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"color:black">&nbsp;<o:p></o:p><=
/span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"col=
or:black">3)</span><span style=3D"font-size:7.0pt;font-family:&quot;Times Ne=
w Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"color:black">If so, should be passed in BGP Hello mess=
age?&nbsp; <o:p>
</o:p></span></p>
<p class=3D"MsoListParagraph"><span style=3D"color:black">Or should it be a p=
art of another protocol (e.g. LLDP, BFD, etc).
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.2in"><span style=3D"col=
or:black">4)</span><span style=3D"font-size:7.0pt;font-family:&quot;Times Ne=
w Roman&quot;,serif;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"color:black">Does this interact with any of the LSVR w=
ork? <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">I want to thank the autho=
rs for their patience while we sorted through some of the WG LC for other dr=
afts.&nbsp; We decided to wait until some of those discussion were cleared u=
p prior to starting a new WG Adoption
 call.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">Susan Hares <o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"line-height:15.0pt"><span style=3D"font-size=
:10.5pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black;mso-fareast-la=
nguage:EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</div>
</div>


</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span>Idr mailing list</span><br><span=
><a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a></span><br><span><a href=3D=
"https://www.ietf.org/mailman/listinfo/idr">https://www.ietf.org/mailman/lis=
tinfo/idr</a></span><br></div></blockquote></body></html>=

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Thread-Topic: two-session IDR format feedback?
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/YCH8F0Aqs2byaU8s0-qBmBXBp78>
Subject: [Idr] two-session IDR format feedback?
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Hi All,

Our split meeting this week was an experiment. When Sue and I came up with =
the idea we'd noticed that we tend to attract topics in clusters (e.g., BGP=
-LS drafts; SR drafts) and we wondered if everyone really wanted to partici=
pate in all of those. One of our goals in splitting the meeting was to find=
 out if folks might consult the agenda and decide to attend one session or =
the other but not both, based on agenda content. Based on a rough guesstima=
te of turnout, I'm not confident that happened, although "Friday" is a conf=
ounding factor.

We would be interested in the WG's feedback on what you liked, or didn't li=
ke, about the split session (and if you can find a way to leave "it was Fri=
day" out of your consideration it would probably be helpful, because that w=
asn't part of the plan nor something we would deliberately repeat).=20

One thing we noticed and hadn't necessarily expected was that there seemed =
to us to be more energy in the room both sessions. One packed 2.5 hour sess=
ion often seems like too much to allow people to maintain engagement by the=
 time we end. One negative from our perspective was that managing two short=
er packed agendas instead of one longer one, affords the chairs less flexib=
ility. If a talk in session 1 runs short, it doesn't help us at all with se=
ssion 2.

Your comments are welcome either on-list or unicast to the chairs, about wh=
ether you think this is worth repeating or whether you like the 2.5 hour si=
ngle session format better.

Thanks,

--John=


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Date: Sat, 21 Jul 2018 13:42:53 +0000
From: Job Snijders <job@instituut.net>
To: John Scudder <jgs@juniper.net>
Cc: idr wg <idr@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
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Subject: Re: [Idr] two-session IDR format feedback?
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Dear John & Sue,

On Sat, Jul 21, 2018 at 01:29:18PM +0000, John Scudder wrote:
> Your comments are welcome either on-list or unicast to the chairs,
> about whether you think this is worth repeating or whether you like
> the 2.5 hour single session format better.

I liked the format. I think the 2 session approach helps counter
potential for audience fatigue, but also has other advantages such as
easier to get a beverage or biobreak. In corporate context a 2,5 hour
meeting is rarely ideal either. Good idea!

Kind regards,

Job


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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Sat, 21 Jul 2018 11:46:28 -0700
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To: Job Snijders <job@instituut.net>
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/S0JrQnnqJPV5IH6rT2QFXxcJsPE>
Subject: Re: [Idr] two-session IDR format feedback?
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+1 Job!
Having had 2 RTGWG sessions for number of years - it gives you more flexibil=
ity, ability to accommodate late minute requests that seem of importance and=
 reshuffle times in case of conflicts.

Regards,
Jeff

> On Jul 21, 2018, at 06:42, Job Snijders <job@instituut.net> wrote:
>=20
> Dear John & Sue,
>=20
>> On Sat, Jul 21, 2018 at 01:29:18PM +0000, John Scudder wrote:
>> Your comments are welcome either on-list or unicast to the chairs,
>> about whether you think this is worth repeating or whether you like
>> the 2.5 hour single session format better.
>=20
> I liked the format. I think the 2 session approach helps counter
> potential for audience fatigue, but also has other advantages such as
> easier to get a beverage or biobreak. In corporate context a 2,5 hour
> meeting is rarely ideal either. Good idea!
>=20
> Kind regards,
>=20
> Job
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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Date: Sat, 21 Jul 2018 18:52:59 +0000 (UTC)
From: guntervandeveldecc@icloud.com
To: Job Snijders <job@instituut.net>, Jeff Tantsura <jefftant.ietf@gmail.com>
Cc: idr-chairs@ietf.org, idr wg <idr@ietf.org>
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Subject: Re: [Idr] two-session IDR format feedback?
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Yes, the format was good... shorter slots do tend to get a slot on Friday as most shorter slots are available then. Its not reslly sn issue i find as it can be accomodated in advance in peoples agenda...




G/




Gunter Van de Velde







On Sat, Jul 21, 2018 at 8:46 PM +0200, "Jeff Tantsura" <jefftant.ietf@gmail.com> wrote:










+1 Job!
Having had 2 RTGWG sessions for number of years - it gives you more flexibility, ability to accommodate late minute requests that seem of importance and reshuffle times in case of conflicts.

Regards,
Jeff

> On Jul 21, 2018, at 06:42, Job Snijders  wrote:
> 
> Dear John & Sue,
> 
>> On Sat, Jul 21, 2018 at 01:29:18PM +0000, John Scudder wrote:
>> Your comments are welcome either on-list or unicast to the chairs,
>> about whether you think this is worth repeating or whether you like
>> the 2.5 hour single session format better.
> 
> I liked the format. I think the 2 session approach helps counter
> potential for audience fatigue, but also has other advantages such as
> easier to get a beverage or biobreak. In corporate context a 2,5 hour
> meeting is rarely ideal either. Good idea!
> 
> Kind regards,
> 
> Job
> 
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr






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<html><head></head><body><div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Yes, the format was good... shorter slots do tend to get a slot on Friday as most shorter slots are available then. Its not reslly sn issue i find as it can be accomodated in advance in peoples agenda...<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">G/<br>
<br>
</div>
<div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; "><div dir="auto" style="direction: ltr; margin: 0; padding: 0; font-family: sans-serif; font-size: 11pt; color: black; ">Gunter Van de Velde</div>
<br>
</div>
<br><br><br>
<div class="gmail_quote">On Sat, Jul 21, 2018 at 8:46 PM +0200, "Jeff Tantsura" <span dir="ltr">&lt;<a href="mailto:jefftant.ietf@gmail.com" target="_blank">jefftant.ietf@gmail.com</a>&gt;</span> wrote:<br>
<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">




<div dir="3D&quot;ltr&quot;">
<pre>+1 Job!
Having had 2 RTGWG sessions for number of years - it gives you more flexibility, ability to accommodate late minute requests that seem of importance and reshuffle times in case of conflicts.

Regards,
Jeff

&gt; On Jul 21, 2018, at 06:42, Job Snijders <job@instituut.net> wrote:
&gt; 
&gt; Dear John &amp; Sue,
&gt; 
&gt;&gt; On Sat, Jul 21, 2018 at 01:29:18PM +0000, John Scudder wrote:
&gt;&gt; Your comments are welcome either on-list or unicast to the chairs,
&gt;&gt; about whether you think this is worth repeating or whether you like
&gt;&gt; the 2.5 hour single session format better.
&gt; 
&gt; I liked the format. I think the 2 session approach helps counter
&gt; potential for audience fatigue, but also has other advantages such as
&gt; easier to get a beverage or biobreak. In corporate context a 2,5 hour
&gt; meeting is rarely ideal either. Good idea!
&gt; 
&gt; Kind regards,
&gt; 
&gt; Job
&gt; 
&gt; _______________________________________________
&gt; Idr mailing list
&gt; Idr@ietf.org
&gt; https://www.ietf.org/mailman/listinfo/idr

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr
</job@instituut.net></pre>
</div>

</blockquote>
</div>
</body></html>
------=_Part_1011_307398706.1532199179445--


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Date: Sat, 21 Jul 2018 22:56:35 +0200
From: Gert Doering <gert@space.net>
To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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Hi,

On Sat, Jul 21, 2018 at 01:24:51AM +0000, Jakob Heitz (jheitz) wrote:
> And they open large horrible bugs against it, which is why telemetry was invented. 

And these large horrible bugs disappear over night by wrapping existing
information in a new encoding and a new transport?

Impressive :)

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

SpaceNet AG                      Vorstand: Sebastian v. Bomhard, Michael Emmer
Joseph-Dollinger-Bogen 14        Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                 HRB: 136055 (AG Muenchen)
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Gert Doering <gert@space.net>
CC: Randy Bush <randy@psg.com>, idr wg <idr@ietf.org>
Thread-Topic: [Idr] BGP-LS vs gRPC/gpb or...
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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Yes.

SNMP is pull based. That means the management system has to ask for the rou=
ting table.
The router sends the whole table, even if nothing or very little has change=
d.
A huge waste of resources. It makes things horribly slow.
SNMP is udp based, so packets drop.
In many cases, the OID structure of SNMP is a transpose of the way the data=
 is stored
in the router, making data retrieval very inefficient.
SNMP has no ability to snapshot a set of data: each item is independent of =
the next. Statistics change as they are being sent. One statistic will be i=
nconsistent with the next one, because it was sampled at a different time.

Streaming telemetry has choices of transport and push/pull.
The best way is push mode and a tcp based transport, like GRPC.
Routes are only sent when they change. Unchanged data is not sent.

Frequently changing statistics may be better retrieved using the pull model=
.

Regards,
Jakob.


-----Original Message-----
From: Gert Doering <gert@space.net>=20
Sent: Saturday, July 21, 2018 1:57 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: Randy Bush <randy@psg.com>; idr wg <idr@ietf.org>
Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...

Hi,

On Sat, Jul 21, 2018 at 01:24:51AM +0000, Jakob Heitz (jheitz) wrote:
> And they open large horrible bugs against it, which is why telemetry was =
invented.=20

And these large horrible bugs disappear over night by wrapping existing
information in a new encoding and a new transport?

Impressive :)

Gert Doering
        -- NetMaster
--=20
have you enabled IPv6 on something today...?

SpaceNet AG                      Vorstand: Sebastian v. Bomhard, Michael Em=
mer
Joseph-Dollinger-Bogen 14        Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                 HRB: 136055 (AG Muenchen)
Tel: +49 (0)89/32356-444         USt-IdNr.: DE813185279


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
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Thread-Topic: [Idr] Why L2 liveness needed for BGP-SPF
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From nobody Sun Jul 22 04:34:47 2018
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From: Randy Bush <randy@psg.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
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Subject: Re: [Idr] Why L2 liveness needed for BGP-SPF
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> L2 can be Ethernet, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and
> others that may be invented in the future.

it could be tin cans and a string.  but out here in the internet, it's
ethernet.  there are tiny vestiges of sonet, which you seem to have
forgotten; but no one is gonna run bgp-spf over them.  it is a mono-
culture; ethernet won.

randy


From nobody Sun Jul 22 07:09:27 2018
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From: Victor Kuarsingh <victor@jvknet.com>
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To: Randy Bush <randy@psg.com>
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Subject: Re: [Idr] Why L2 liveness needed for BGP-SPF
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On Sun, Jul 22, 2018 at 7:35 AM Randy Bush <randy@psg.com> wrote:

> > L2 can be Ethernet, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and
> > others that may be invented in the future.
>
> it could be tin cans and a string.  but out here in the internet, it's
> ethernet.  there are tiny vestiges of sonet, which you seem to have
> forgotten; but no one is gonna run bgp-spf over them.  it is a mono-
> culture; ethernet won.


>
At this point, the current applicability for BGP-SPF is Data Center / CLOS
networks as described in the applicability document (
https://tools.ietf.org/html/draft-keyupate-lsvr-applicability-02)

There is some texts around future use of this protocol (SP backbone), but
again not the focus of our current work.

That said, as noted by Randy, these topologies are currently Ethernet (at
least in the cases we are aware of).

Regards,

Victor K




> randy
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

--0000000000006b7b1d057197136e
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div><br></div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Sun,=
 Jul 22, 2018 at 7:35 AM Randy Bush &lt;<a href=3D"mailto:randy@psg.com">ra=
ndy@psg.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">&gt; L2 =
can be Ethernet, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and<br>
&gt; others that may be invented in the future.<br>
<br>
it could be tin cans and a string.=C2=A0 but out here in the internet, it&#=
39;s<br>
ethernet.=C2=A0 there are tiny vestiges of sonet, which you seem to have<br=
>
forgotten; but no one is gonna run bgp-spf over them.=C2=A0 it is a mono-<b=
r>
culture; ethernet won.</blockquote><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
</blockquote><div dir=3D"auto"><br></div><div dir=3D"auto">At this point, t=
he current applicability for BGP-SPF is Data Center / CLOS networks as desc=
ribed in the applicability document (<a href=3D"https://tools.ietf.org/html=
/draft-keyupate-lsvr-applicability-02">https://tools.ietf.org/html/draft-ke=
yupate-lsvr-applicability-02</a>)</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">There is some texts around future use of this protocol (SP backbo=
ne), but again not the focus of our current work.=C2=A0</div><div dir=3D"au=
to"><br></div><div dir=3D"auto">That said, as noted by Randy, these topolog=
ies are currently Ethernet (at least in the cases we are aware of).</div><d=
iv dir=3D"auto"><br></div><div dir=3D"auto">Regards,</div><div dir=3D"auto"=
><br></div><div dir=3D"auto">Victor K</div><div dir=3D"auto"><br></div><div=
 dir=3D"auto"><br></div><div dir=3D"auto"><br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-le=
ft:1ex"><br>
randy<br>
<br>
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sun, 22 Jul 2018 09:43:44 -0500
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To: Victor Kuarsingh <victor@jvknet.com>
Cc: Randy Bush <randy@psg.com>, idr@ietf.org, "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Lsvr@ietf.org" <Lsvr@ietf.org>
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Subject: Re: [Idr] [Lsvr]  Why L2 liveness needed for BGP-SPF
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Dear All,
hope an easy question you'll help me with. Liveness as path continuity
check or as connectivity verification.

Regards,
Greg

On Sun, Jul 22, 2018, 09:09 Victor Kuarsingh <victor@jvknet.com> wrote:

>
>
> On Sun, Jul 22, 2018 at 7:35 AM Randy Bush <randy@psg.com> wrote:
>
>> > L2 can be Ethernet, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and
>> > others that may be invented in the future.
>>
>> it could be tin cans and a string.  but out here in the internet, it's
>> ethernet.  there are tiny vestiges of sonet, which you seem to have
>> forgotten; but no one is gonna run bgp-spf over them.  it is a mono-
>> culture; ethernet won.
>
>
>>
> At this point, the current applicability for BGP-SPF is Data Center / CLOS
> networks as described in the applicability document (
> https://tools.ietf.org/html/draft-keyupate-lsvr-applicability-02)
>
> There is some texts around future use of this protocol (SP backbone), but
> again not the focus of our current work.
>
> That said, as noted by Randy, these topologies are currently Ethernet (at
> least in the cases we are aware of).
>
> Regards,
>
> Victor K
>
>
>
>
>> randy
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
> _______________________________________________
> Lsvr mailing list
> Lsvr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsvr
>

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<div dir=3D"auto">Dear All,=C2=A0<div dir=3D"auto">hope an easy question yo=
u&#39;ll help me with. Liveness as path continuity check or as connectivity=
 verification.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Reg=
ards,=C2=A0</div><div dir=3D"auto">Greg=C2=A0</div></div><br><div class=3D"=
gmail_quote"><div dir=3D"ltr">On Sun, Jul 22, 2018, 09:09 Victor Kuarsingh =
&lt;<a href=3D"mailto:victor@jvknet.com">victor@jvknet.com</a>&gt; wrote:<b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex"><div><br></div><div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr">On Sun, Jul 22, 2018 at 7:35 AM Randy Bus=
h &lt;<a href=3D"mailto:randy@psg.com" target=3D"_blank" rel=3D"noreferrer"=
>randy@psg.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">&gt; =
L2 can be Ethernet, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and<br>
&gt; others that may be invented in the future.<br>
<br>
it could be tin cans and a string.=C2=A0 but out here in the internet, it&#=
39;s<br>
ethernet.=C2=A0 there are tiny vestiges of sonet, which you seem to have<br=
>
forgotten; but no one is gonna run bgp-spf over them.=C2=A0 it is a mono-<b=
r>
culture; ethernet won.</blockquote><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
</blockquote><div dir=3D"auto"><br></div><div dir=3D"auto">At this point, t=
he current applicability for BGP-SPF is Data Center / CLOS networks as desc=
ribed in the applicability document (<a href=3D"https://tools.ietf.org/html=
/draft-keyupate-lsvr-applicability-02" target=3D"_blank" rel=3D"noreferrer"=
>https://tools.ietf.org/html/draft-keyupate-lsvr-applicability-02</a>)</div=
><div dir=3D"auto"><br></div><div dir=3D"auto">There is some texts around f=
uture use of this protocol (SP backbone), but again not the focus of our cu=
rrent work.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">That s=
aid, as noted by Randy, these topologies are currently Ethernet (at least i=
n the cases we are aware of).</div><div dir=3D"auto"><br></div><div dir=3D"=
auto">Regards,</div><div dir=3D"auto"><br></div><div dir=3D"auto">Victor K<=
/div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=3D"au=
to"><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><br>
randy<br>
<br>
_______________________________________________<br>
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eferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/idr</a><br=
>
</blockquote></div></div>
_______________________________________________<br>
Lsvr mailing list<br>
<a href=3D"mailto:Lsvr@ietf.org" target=3D"_blank" rel=3D"noreferrer">Lsvr@=
ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/lsvr" rel=3D"noreferrer no=
referrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/lsvr</a><=
br>
</blockquote></div>

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To: Greg Mirsky <gregimirsky@gmail.com>
Cc: Victor Kuarsingh <victor@jvknet.com>, Randy Bush <randy@psg.com>, idr wg <idr@ietf.org>,  "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Lsvr@ietf.org" <Lsvr@ietf.org>
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Subject: Re: [Idr] [Lsvr]  Why L2 liveness needed for BGP-SPF
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Is IETF a new forum for Ethernet specification ? I was always under slight
impression that this is rather IEEE Ethernet WG ...

http://www.ieee802.org/3/

On Sun, Jul 22, 2018 at 4:43 PM, Greg Mirsky <gregimirsky@gmail.com> wrote:

> Dear All,
> hope an easy question you'll help me with. Liveness as path continuity
> check or as connectivity verification.
>
> Regards,
> Greg
>
> On Sun, Jul 22, 2018, 09:09 Victor Kuarsingh <victor@jvknet.com> wrote:
>
>>
>>
>> On Sun, Jul 22, 2018 at 7:35 AM Randy Bush <randy@psg.com> wrote:
>>
>>> > L2 can be Ethernet, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and
>>> > others that may be invented in the future.
>>>
>>> it could be tin cans and a string.  but out here in the internet, it's
>>> ethernet.  there are tiny vestiges of sonet, which you seem to have
>>> forgotten; but no one is gonna run bgp-spf over them.  it is a mono-
>>> culture; ethernet won.
>>
>>
>>>
>> At this point, the current applicability for BGP-SPF is Data Center /
>> CLOS networks as described in the applicability document (
>> https://tools.ietf.org/html/draft-keyupate-lsvr-applicability-02)
>>
>> There is some texts around future use of this protocol (SP backbone), but
>> again not the focus of our current work.
>>
>> That said, as noted by Randy, these topologies are currently Ethernet (at
>> least in the cases we are aware of).
>>
>> Regards,
>>
>> Victor K
>>
>>
>>
>>
>>> randy
>>>
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>>
>> _______________________________________________
>> Lsvr mailing list
>> Lsvr@ietf.org
>> https://www.ietf.org/mailman/listinfo/lsvr
>>
>
> _______________________________________________
> Lsvr mailing list
> Lsvr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsvr
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Is IETF a =
new forum for Ethernet specification ? I was always under slight impression=
 that this is rather IEEE Ethernet WG ...=C2=A0</div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default"><font face=3D"arial, helvetica, sans-se=
rif"><a href=3D"http://www.ieee802.org/3/">http://www.ieee802.org/3/</a></f=
ont><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quot=
e">On Sun, Jul 22, 2018 at 4:43 PM, Greg Mirsky <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto">=
Dear All,=C2=A0<div dir=3D"auto">hope an easy question you&#39;ll help me w=
ith. Liveness as path continuity check or as connectivity verification.=C2=
=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Regards,=C2=A0</div>=
<div dir=3D"auto">Greg=C2=A0</div></div><br><div class=3D"gmail_quote"><div=
><div class=3D"h5"><div dir=3D"ltr">On Sun, Jul 22, 2018, 09:09 Victor Kuar=
singh &lt;<a href=3D"mailto:victor@jvknet.com" target=3D"_blank">victor@jvk=
net.com</a>&gt; wrote:<br></div></div></div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">=
<div><div class=3D"h5"><div><br></div><div><br><div class=3D"gmail_quote"><=
div dir=3D"ltr">On Sun, Jul 22, 2018 at 7:35 AM Randy Bush &lt;<a href=3D"m=
ailto:randy@psg.com" rel=3D"noreferrer" target=3D"_blank">randy@psg.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">&gt; L2 can be Ethernet=
, Token Ring, ATM, Frame Relay, PPP, SLIP, MTP2 and<br>
&gt; others that may be invented in the future.<br>
<br>
it could be tin cans and a string.=C2=A0 but out here in the internet, it&#=
39;s<br>
ethernet.=C2=A0 there are tiny vestiges of sonet, which you seem to have<br=
>
forgotten; but no one is gonna run bgp-spf over them.=C2=A0 it is a mono-<b=
r>
culture; ethernet won.</blockquote><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
</blockquote><div dir=3D"auto"><br></div><div dir=3D"auto">At this point, t=
he current applicability for BGP-SPF is Data Center / CLOS networks as desc=
ribed in the applicability document (<a href=3D"https://tools.ietf.org/html=
/draft-keyupate-lsvr-applicability-02" rel=3D"noreferrer" target=3D"_blank"=
>https://tools.ietf.org/html/<wbr>draft-keyupate-lsvr-<wbr>applicability-02=
</a>)</div><div dir=3D"auto"><br></div><div dir=3D"auto">There is some text=
s around future use of this protocol (SP backbone), but again not the focus=
 of our current work.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"au=
to">That said, as noted by Randy, these topologies are currently Ethernet (=
at least in the cases we are aware of).</div><div dir=3D"auto"><br></div><d=
iv dir=3D"auto">Regards,</div><div dir=3D"auto"><br></div><div dir=3D"auto"=
>Victor K</div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div=
 dir=3D"auto"><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
randy<br>
<br>
______________________________<wbr>_________________<br>
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</blockquote></div></div></div></div>
______________________________<wbr>_________________<br>
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From: Randy Bush <randy@psg.com>
To: Greg Mirsky <gregimirsky@gmail.com>
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Subject: Re: [Idr] [Lsvr]  Why L2 liveness needed for BGP-SPF
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> hope an easy question you'll help me with. Liveness as path continuity
> check or as connectivity verification.

layer 2 link liveness.  we have other tools above layer 2; e.g. bfd.

randy


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Subject: Re: [Idr] [Lsvr]  Why L2 liveness needed for BGP-SPF
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Hi Randy,
thank you for the quick response to my question. BFD monitors path
continuity at the layer 3, though there's BFD over LAG that picks into the
layer 2. One cannot differentiate between liveness of the remote system and
availability of the path between two systems. If we are not interested
whether packets from the particular source and only that source received,
then we use path continuity check protocol. BFD is the example of the CC
while CFM, Layer 2, is the connectivity verification.

Regards,
Greg

On Sun, Jul 22, 2018, 10:42 Randy Bush <randy@psg.com> wrote:

> > hope an easy question you'll help me with. Liveness as path continuity
> > check or as connectivity verification.
>
> layer 2 link liveness.  we have other tools above layer 2; e.g. bfd.
>
> randy
>

--000000000000c46a4b057199b00a
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<div dir=3D"auto">Hi Randy,<div dir=3D"auto">thank you for the quick respon=
se to my question. BFD monitors path continuity at the layer 3, though ther=
e&#39;s BFD over LAG that picks into the layer 2. One cannot differentiate =
between liveness of the remote system and availability of the path between =
two systems. If we are not interested whether packets from the particular s=
ource and only that source received, then we use path continuity check prot=
ocol. BFD is the example of the CC while CFM, Layer 2, is the connectivity =
verification.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Rega=
rds,=C2=A0</div><div dir=3D"auto">Greg=C2=A0</div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr">On Sun, Jul 22, 2018, 10:42 Randy Bush &lt;<a =
href=3D"mailto:randy@psg.com" target=3D"_blank" rel=3D"noreferrer">randy@ps=
g.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">&gt; hope an e=
asy question you&#39;ll help me with. Liveness as path continuity<br>
&gt; check or as connectivity verification.<br>
<br>
layer 2 link liveness.=C2=A0 we have other tools above layer 2; e.g. bfd.<b=
r>
<br>
randy<br>
</blockquote></div>

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Hey Greg,

I don't think this is about liveness or connectivity verification.

It is all about physical topology discovery at L2 without one of two
popular link state protocol which today do the job just fine. Whoever is
asking for it is however correct that we don't have a protocol independent
way of discovering Ethernet topologies. If it is a feature or a drawback
remains to be seen.

I was observing identical struggle in OF .. as expected it failed pretty
badly !

Just to note L3 BGP Hellos to discover topology is terrible idea even worse
then LLDP one.

Thx,
R.


On Sun, Jul 22, 2018 at 7:16 PM, Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Randy,
> thank you for the quick response to my question. BFD monitors path
> continuity at the layer 3, though there's BFD over LAG that picks into the
> layer 2. One cannot differentiate between liveness of the remote system and
> availability of the path between two systems. If we are not interested
> whether packets from the particular source and only that source received,
> then we use path continuity check protocol. BFD is the example of the CC
> while CFM, Layer 2, is the connectivity verification.
>
> Regards,
> Greg
>
> On Sun, Jul 22, 2018, 10:42 Randy Bush <randy@psg.com> wrote:
>
>> > hope an easy question you'll help me with. Liveness as path continuity
>> > check or as connectivity verification.
>>
>> layer 2 link liveness.  we have other tools above layer 2; e.g. bfd.
>>
>> randy
>>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--000000000000beab9c05719e550c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hey Greg,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">I don&#39;t think this is about liveness or connect=
ivity verification.=C2=A0</div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sma=
ll">It is all about physical topology discovery at L2 without one of two po=
pular link state protocol which today do the job just fine. Whoever is aski=
ng for it is however correct that we don&#39;t have a protocol independent =
way of discovering Ethernet topologies. If it is a feature or a drawback re=
mains to be seen.=C2=A0</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
">I was observing identical struggle in OF .. as expected it failed pretty =
badly !=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Just to =
note L3 BGP Hellos to discover topology is terrible idea even worse then LL=
DP one.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">R.</div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small"><br></div></div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sun, Jul 22, 2018 at 7:1=
6 PM, Greg Mirsky <span dir=3D"ltr">&lt;<a href=3D"mailto:gregimirsky@gmail=
.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt;</span> wrote:<br><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex"><div dir=3D"auto">Hi Randy,<div dir=3D"auto">tha=
nk you for the quick response to my question. BFD monitors path continuity =
at the layer 3, though there&#39;s BFD over LAG that picks into the layer 2=
. One cannot differentiate between liveness of the remote system and availa=
bility of the path between two systems. If we are not interested whether pa=
ckets from the particular source and only that source received, then we use=
 path continuity check protocol. BFD is the example of the CC while CFM, La=
yer 2, is the connectivity verification.=C2=A0</div><div dir=3D"auto"><br><=
/div><div dir=3D"auto">Regards,=C2=A0</div><span class=3D"HOEnZb"><font col=
or=3D"#888888"><div dir=3D"auto">Greg=C2=A0</div></font></span></div><div c=
lass=3D"HOEnZb"><div class=3D"h5"><br><div class=3D"gmail_quote"><div dir=
=3D"ltr">On Sun, Jul 22, 2018, 10:42 Randy Bush &lt;<a href=3D"mailto:randy=
@psg.com" rel=3D"noreferrer" target=3D"_blank">randy@psg.com</a>&gt; wrote:=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex">&gt; hope an easy question you&#39=
;ll help me with. Liveness as path continuity<br>
&gt; check or as connectivity verification.<br>
<br>
layer 2 link liveness.=C2=A0 we have other tools above layer 2; e.g. bfd.<b=
r>
<br>
randy<br>
</blockquote></div>
</div></div><br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--000000000000beab9c05719e550c--


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References: <fb35cb79-881d-4ca2-8a0b-738886d28b8f.xiaohu.xxh@alibaba-inc.com> <bd5ff63067a8446ca8e2267c891933ad@XCH-ALN-014.cisco.com> <m2muujec6q.wl-randy@psg.com> <CAJc3aaNCM0XCDEVmkKxxvKxXdMdKsB+YDWLM3qGo83x271D-ow@mail.gmail.com> <CA+RyBmXvE2gJVuXBB31jj8+CDRB8zBq+97fhhgzpJbNAVDbmZg@mail.gmail.com> <m2k1pne0pp.wl-randy@psg.com> <CA+RyBmV9QzaqbLZ=gbtaQ3+bpsH+zSfmxOvPkczJYCXas9HjEA@mail.gmail.com> <CA+b+ERmfSmjJJVLNs8HnG34Y3q6PJVLntvx+hb4fCpWXgWsr9Q@mail.gmail.com>
From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sun, 22 Jul 2018 15:55:56 -0700
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To: Robert Raszuk <robert@raszuk.net>
Cc: Randy Bush <randy@psg.com>, idr wg <idr@ietf.org>, "Lsvr@ietf.org" <Lsvr@ietf.org>
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Subject: Re: [Idr] [Lsvr] Why L2 liveness needed for BGP-SPF
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--0000000000008f338405719e6ebf
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Hi Robert,
thank you for the clarification. I've got interested in the discussion
since "liveliness" often used as the alternative for "continuity check".
But if it's topology discovery with or without capability advertisement,
I'll sit down.

Regards,
Greg

On Sun, Jul 22, 2018 at 3:49 PM, Robert Raszuk <robert@raszuk.net> wrote:

> Hey Greg,
>
> I don't think this is about liveness or connectivity verification.
>
> It is all about physical topology discovery at L2 without one of two
> popular link state protocol which today do the job just fine. Whoever is
> asking for it is however correct that we don't have a protocol independent
> way of discovering Ethernet topologies. If it is a feature or a drawback
> remains to be seen.
>
> I was observing identical struggle in OF .. as expected it failed pretty
> badly !
>
> Just to note L3 BGP Hellos to discover topology is terrible idea even
> worse then LLDP one.
>
> Thx,
> R.
>
>
> On Sun, Jul 22, 2018 at 7:16 PM, Greg Mirsky <gregimirsky@gmail.com>
> wrote:
>
>> Hi Randy,
>> thank you for the quick response to my question. BFD monitors path
>> continuity at the layer 3, though there's BFD over LAG that picks into the
>> layer 2. One cannot differentiate between liveness of the remote system and
>> availability of the path between two systems. If we are not interested
>> whether packets from the particular source and only that source received,
>> then we use path continuity check protocol. BFD is the example of the CC
>> while CFM, Layer 2, is the connectivity verification.
>>
>> Regards,
>> Greg
>>
>> On Sun, Jul 22, 2018, 10:42 Randy Bush <randy@psg.com> wrote:
>>
>>> > hope an easy question you'll help me with. Liveness as path continuity
>>> > check or as connectivity verification.
>>>
>>> layer 2 link liveness.  we have other tools above layer 2; e.g. bfd.
>>>
>>> randy
>>>
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>

--0000000000008f338405719e6ebf
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Robert,<div>thank you for the clarification. I&#39;ve g=
ot interested in the discussion since &quot;liveliness&quot; often used as =
the alternative for &quot;continuity check&quot;. But if it&#39;s topology =
discovery=C2=A0with or without capability advertisement, I&#39;ll sit down.=
</div><div><br></div><div>Regards,</div><div>Greg</div></div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote">On Sun, Jul 22, 2018 at 3:49 PM=
, Robert Raszuk <span dir=3D"ltr">&lt;<a href=3D"mailto:robert@raszuk.net" =
target=3D"_blank">robert@raszuk.net</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small">Hey Greg,</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">I don&#39;t think this is about li=
veness or connectivity verification.=C2=A0</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">It is all about physical topology discovery at L2 with=
out one of two popular link state protocol which today do the job just fine=
. Whoever is asking for it is however correct that we don&#39;t have a prot=
ocol independent way of discovering Ethernet topologies. If it is a feature=
 or a drawback remains to be seen.=C2=A0</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">I was observing identical struggle in OF .. as expected =
it failed pretty badly !=C2=A0</div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Just to note L3 BGP Hellos to discover topology is terrible idea e=
ven worse then LLDP one.=C2=A0</div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Thx,</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">R.</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
</div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"><div><div c=
lass=3D"h5">On Sun, Jul 22, 2018 at 7:16 PM, Greg Mirsky <span dir=3D"ltr">=
&lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@=
gmail.com</a>&gt;</span> wrote:<br></div></div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div><div class=3D"h5"><div dir=3D"auto">Hi Randy,<div dir=3D"auto">than=
k you for the quick response to my question. BFD monitors path continuity a=
t the layer 3, though there&#39;s BFD over LAG that picks into the layer 2.=
 One cannot differentiate between liveness of the remote system and availab=
ility of the path between two systems. If we are not interested whether pac=
kets from the particular source and only that source received, then we use =
path continuity check protocol. BFD is the example of the CC while CFM, Lay=
er 2, is the connectivity verification.=C2=A0</div><div dir=3D"auto"><br></=
div><div dir=3D"auto">Regards,=C2=A0</div><span class=3D"m_8381702928577554=
727HOEnZb"><font color=3D"#888888"><div dir=3D"auto">Greg=C2=A0</div></font=
></span></div><div class=3D"m_8381702928577554727HOEnZb"><div class=3D"m_83=
81702928577554727h5"><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Sun=
, Jul 22, 2018, 10:42 Randy Bush &lt;<a href=3D"mailto:randy@psg.com" rel=
=3D"noreferrer" target=3D"_blank">randy@psg.com</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #=
ccc solid;padding-left:1ex">&gt; hope an easy question you&#39;ll help me w=
ith. Liveness as path continuity<br>
&gt; check or as connectivity verification.<br>
<br>
layer 2 link liveness.=C2=A0 we have other tools above layer 2; e.g. bfd.<b=
r>
<br>
randy<br>
</blockquote></div>
</div></div><br></div></div><span class=3D"">______________________________=
<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></span></blockquote></div><br></div>
</blockquote></div><br></div>

--0000000000008f338405719e6ebf--


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To: "'Peter Psenak'" <ppsenak@cisco.com>, <chopps@chopps.org>
Cc: <idr@ietf.org>, "'Acee Lindem \(acee\)'" <acee@cisco.com>, "'Ketan Talaulikar \(ketant\)'" <ketant@cisco.com>, "'Dongjie \(Jimmy\)'" <jie.dong@huawei.com>
Date: Mon, 23 Jul 2018 15:16:46 +0800
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Subject: [Idr] Regarding OSPF extension for inter-area topology retrieval
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Hi, Peter:

 

I am Aijun Wang from China Telecom, the author of draft about
<https://datatracker.ietf.org/doc/draft-wang-lsr-ospf-inter-area-topology-ex
t/> "OSPF extension for inter-area topology retrieval", which is presented
by Mr.Jie Dong during the IETF102 meeting.

Thanks for your comments on the presentation material
<https://datatracker.ietf.org/meeting/102/materials/slides-102-lsr-ospf-inte
r-area-topology-retrieval-00> .

Below are my explanation that regarding to the question about "how it
retrievals the inter-area topology based on the extension information":

 

Let's see the graph that illustrates in Fig.1 at section 3
<https://tools.ietf.org/html/draft-wang-lsr-ospf-inter-area-topology-ext-00#
section-3>  of the draft(I copy it also below for your conveniences ):

 



 

Assuming we want to rebuild the connection between router S1 and router S2
that locates in area 1:

1)       Normally, router S1 will advertise prefix N1 within its router LSA

2)       When this router LSA reaches the ABR router R1, it will convert it
into summary LSA, add the "Source Router Information", which is router id of
S1 in this example, as proposed in this draft.

3)       R1 then floods this extension summary LSA to R0, which is running
BGP-LS protocol with IP SDN Controller. The controller then knows the
prefixes of N1 is from S1.

4)       Router S2 will do the similar process, and the controller will also
knows the prefixes N1 is also from S2

5)       Then it can reconstruct the connection between S1 and S2, which
prefix is N1. The topology within Area 1 can then be recovered accordingly.


 

Does the above explanation can answer your question. if so, I can add it
into the context of this draft in updated version.

 

 

Best Regards.

 

Aijun Wang

Network R&D and Operation Support Department

China Telecom Corporation Limited Beijing Research Institute,Beijing, China.

 

 


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vlink=3Dpurple style=3D'text-justify-trim:punctuation'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US>Hi, =
Peter:<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>I am Aijun Wang from China Telecom, the author of draft =
about <a =
href=3D"https://datatracker.ietf.org/doc/draft-wang-lsr-ospf-inter-area-t=
opology-ext/">&#8220;OSPF extension for inter-area topology =
retrieval&#8221;</a>, which is presented by Mr.Jie Dong during the =
IETF102 meeting.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Thanks for your comments on the <a =
href=3D"https://datatracker.ietf.org/meeting/102/materials/slides-102-lsr=
-ospf-inter-area-topology-retrieval-00">presentation =
material</a>.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Below are my explanation that regarding to the question =
about &#8220;how it retrievals the inter-area topology based on the =
extension information&#8221;:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Let&#8217;s see the graph that =
illustrates in Fig.1 at <a =
href=3D"https://tools.ietf.org/html/draft-wang-lsr-ospf-inter-area-topolo=
gy-ext-00#section-3">section 3</a> of the draft(I copy it also below for =
your conveniences ):<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><img border=3D0 width=3D547 height=3D338 =
id=3D"_x56fe__x7247__x0020_2" =
src=3D"cid:image001.png@01D42297.74CBB3E0"></span><span =
lang=3DEN-US><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Assuming we want to rebuild the connection between router =
S1 and router S2 that locates in area 1:<o:p></o:p></span></p><p =
class=3DMsoListParagraph =
style=3D'margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span lang=3DEN-US><span =
style=3D'mso-list:Ignore'>1)<span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span lang=3DEN-US>Normally, router S1 =
will advertise prefix N1 within its router LSA<o:p></o:p></span></p><p =
class=3DMsoListParagraph =
style=3D'margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span lang=3DEN-US><span =
style=3D'mso-list:Ignore'>2)<span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span lang=3DEN-US>When this router LSA =
reaches the ABR router R1, it will convert it into summary LSA, add the =
&#8220;Source Router Information&#8221;, which is router id of S1 in =
this example, as proposed in this draft.<o:p></o:p></span></p><p =
class=3DMsoListParagraph =
style=3D'margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span lang=3DEN-US><span =
style=3D'mso-list:Ignore'>3)<span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span lang=3DEN-US>R1 then floods this =
extension summary LSA to R0, which is running BGP-LS protocol with IP =
SDN Controller. The controller then knows the prefixes of N1 is from =
S1.<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span lang=3DEN-US><span =
style=3D'mso-list:Ignore'>4)<span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span lang=3DEN-US>Router S2 will do the =
similar process, and the controller will also knows the prefixes N1 is =
also from S2<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0 level1 =
lfo1'><![if !supportLists]><span lang=3DEN-US><span =
style=3D'mso-list:Ignore'>5)<span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]><span lang=3DEN-US>Then it can =
reconstruct the connection between S1 and S2, which prefix is N1. The =
topology within Area 1 can then be recovered accordingly. =
&nbsp;&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Does the above explanation can answer your question. if so, =
I can add it into the context of this draft in updated =
version.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Best Regards.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Aijun Wang<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Network R&amp;D and Operation =
Support Department<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>China Telecom Corporation Limited Beijing Research =
Institute,Beijing, China.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div></body></html>
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From nobody Mon Jul 23 01:38:52 2018
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From: "Aijun Wang" <wangaijun@tsinghua.org.cn>
To: "'Jeff Tantsura'" <jefftant.ietf@gmail.com>, "'Ketan Talaulikar \(ketant\)'" <ketant@cisco.com>
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Hi, Jeff and Ketan:

=20

Thanks for your comments on the presentation =
<https://datatracker.ietf.org/meeting/102/materials/slides-102-idr-sessb-=
bgp-ls-extend-for-inter-as-topology-retrieval-00>  at the IETF 102 =
meeting, below are the responses for your comments and questions:

=20

Ketan: It would be good to describe the new TLVs in the document

[Aijun Wang]: Yes, I will describe them in detail in the updated =
version.

=20

Jeff Tantsura: The address space used on the interconnection address =
space is uncommon to be imported into the IGP. The address space from =
other operator does not belong in your IGP address space.=20

[Aijun Wang]: As I described in the scenario slide(I copy it also for =
your convenience), it is common for one operator occupy several IGP =
domains that composited by its backbone network and several =
MAN(Metrio-Area-Network)s/IDCs. When they do Traffic Engineering from =
end to end that spans MAN-Backbone-IDC, they need to know the inter-as =
topology via the proposals that described in this draft. Then it is =
naturally to redistribute the interconnection prefixes.

If these IGP domains belong to different operators, it is uncommon do =
inter-as traffic engineering under one PCE/SDN controller/, then it is =
unnecessary to get the inter-as topology. But redistributing the =
interconnection prefixes will do no harm to their networks, because the =
redistributed interconnection link prefixes belongs to both of them, =
they are also the interfaces address on the border routers.

=20

If the above explanation acceptable, I can add it to the =
=E2=80=9Csecurity consideration=E2=80=9D part of the updated version of =
this draft.

=20



=20

=20

Thanks in advance.

=20

=20

Best Regards.

=20

Aijun Wang

Network R&D and Operation Support Department

China Telecom Corporation Limited Beijing Research Institute,Beijing, =
China.

=20

=20

-----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
=E5=8F=91=E4=BB=B6=E4=BA=BA: Aijun Wang =
[mailto:wangaijun@tsinghua.org.cn]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2018=E5=B9=B46=E6=9C=8829=E6=97=A5 =
14:30
=E6=94=B6=E4=BB=B6=E4=BA=BA: idr@ietf.org
=E4=B8=BB=E9=A2=98: [Idr] FW: New Version Notification for =
draft-wang-idr-bgpls-inter-as-topology-ext-01.txt

=20

Hi, All IDRer:

=20

We have uploaded the updated version of the draft about BGP-LS extension =
for inter-AS topology retrieval, which addresses the valuable comments =
from Acee and Ketan during IETF 101 meeting in London.

The draft can be access at  =
<https://tools.ietf.org/html/draft-wang-idr-bgpls-inter-as-topology-ext-0=
1> =
https://tools.ietf.org/html/draft-wang-idr-bgpls-inter-as-topology-ext-01=


Any comments and suggestions are welcome.

=20

Best Regards.

=20

Aijun Wang

Network R&D and Operation Support Department China Telecom Corporation =
Limited Beijing Research Institute,Beijing, China.

=20

-----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----

=E5=8F=91=E4=BB=B6=E4=BA=BA:  <mailto:internet-drafts@ietf.org> =
internet-drafts@ietf.org [ <mailto:internet-drafts@ietf.org> =
mailto:internet-drafts@ietf.org]

=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2018=E5=B9=B46=E6=9C=8829=E6=97=A5 =
14:14

=E6=94=B6=E4=BB=B6=E4=BA=BA: Aijun Wang

=E4=B8=BB=E9=A2=98: New Version Notification for =
draft-wang-idr-bgpls-inter-as-topology-ext-01.txt

=20

=20

A new version of I-D, draft-wang-idr-bgpls-inter-as-topology-ext-01.txt

has been successfully submitted by Aijun Wang and posted to the IETF =
repository.

=20

Name:               draft-wang-idr-bgpls-inter-as-topology-ext

Revision:  01

Title:                  BGP-LS Extend for Inter-AS Topology Retrieval

Document date:       2018-06-28

Group:               Individual Submission

Pages:               7

URL:             =
<https://www.ietf.org/internet-drafts/draft-wang-idr-bgpls-inter-as-topol=
ogy-ext-01.txt> =
https://www.ietf.org/internet-drafts/draft-wang-idr-bgpls-inter-as-topolo=
gy-ext-01.txt

Status:          =
<https://datatracker.ietf.org/doc/draft-wang-idr-bgpls-inter-as-topology-=
ext/> =
https://datatracker.ietf.org/doc/draft-wang-idr-bgpls-inter-as-topology-e=
xt/

Htmlized:        =
<https://tools.ietf.org/html/draft-wang-idr-bgpls-inter-as-topology-ext-0=
1> =
https://tools.ietf.org/html/draft-wang-idr-bgpls-inter-as-topology-ext-01=


Htmlized:        =
<https://datatracker.ietf.org/doc/html/draft-wang-idr-bgpls-inter-as-topo=
logy-ext> =
https://datatracker.ietf.org/doc/html/draft-wang-idr-bgpls-inter-as-topol=
ogy-ext

Diff:            =
<https://www.ietf.org/rfcdiff?url2=3Ddraft-wang-idr-bgpls-inter-as-topolo=
gy-ext-01> =
https://www.ietf.org/rfcdiff?url2=3Ddraft-wang-idr-bgpls-inter-as-topolog=
y-ext-01

=20

Abstract:

   This document describes the process to build BGP-LS key parameters in

   Native IP multi-domain scenario and defines some new inter-AS TE

   related TLVs for BGP-LS to let SDN controller retrieve the network

   topology automatically under various environments.

=20

   Such process and extension can expand the usage of BGP-LS protocol to

   multi- domain, enable the network operator to collect the connection

   relationship between different AS domains and then calculate the

   overall network topology automatically based on the information

   provided by BGP-LS protocol.

=20

                                                                         =
        =20

=20

=20

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.

=20

The IETF Secretariat

=20

_______________________________________________

Idr mailing list

 <mailto:Idr@ietf.org> Idr@ietf.org

 <https://www.ietf.org/mailman/listinfo/idr> =
https://www.ietf.org/mailman/listinfo/idr


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vlink=3Dpurple style=3D'text-justify-trim:punctuation'><div =
class=3DWordSection1><p class=3DMsoPlainText><span lang=3DEN-US>Hi, Jeff =
and Ketan:<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Thanks for your comments on the <a =
href=3D"https://datatracker.ietf.org/meeting/102/materials/slides-102-idr=
-sessb-bgp-ls-extend-for-inter-as-topology-retrieval-00">presentation</a>=
 at the IETF 102 meeting, below are the responses for your comments and =
questions:<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
align=3Dleft style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier New";color:black'>Ketan: =
It would be good to describe the new TLVs in the =
document<o:p></o:p></span></p><p class=3DMsoNormal align=3Dleft =
style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier New";color:black'>[Aijun =
Wang]: Yes, I will describe them in detail in the updated =
version.</span><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier =
New";color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
align=3Dleft style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
align=3Dleft style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier New";color:black'>Jeff =
Tantsura: The address space used on the interconnection address space is =
uncommon to be imported into the IGP. The address space from other =
operator does not belong in your IGP address =
space.&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal align=3Dleft =
style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier New";color:black'>[Aijun =
Wang]: As I described in the scenario slide(I copy it also for your =
convenience), it is common for one operator occupy several IGP domains =
that composited by its backbone network and several =
MAN(Metrio-Area-Network)s/IDCs. When they do Traffic Engineering from =
end to end that spans MAN-Backbone-IDC, they need to know the inter-as =
topology via the proposals that described in this draft. Then it is =
naturally to redistribute the interconnection =
prefixes.<o:p></o:p></span></p><p class=3DMsoNormal align=3Dleft =
style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier New";color:black'>If these =
IGP domains belong to different operators, it is uncommon do inter-as =
traffic engineering under one PCE/SDN controller/, then it is =
unnecessary to get the inter-as topology. But redistributing the =
interconnection prefixes will do no harm to their networks, because the =
redistributed interconnection link prefixes belongs to both of them, =
they are also the interfaces address on the border =
routers.<o:p></o:p></span></p><p class=3DMsoNormal align=3Dleft =
style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
align=3Dleft style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier New";color:black'>If the =
above explanation acceptable, I can add it to the =E2=80=9Csecurity =
consideration=E2=80=9D part of the updated version of this =
draft.<o:p></o:p></span></p><p class=3DMsoNormal align=3Dleft =
style=3D'text-align:left'><span lang=3DEN-US =
style=3D'font-size:9.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><img border=3D0 width=3D385 =
height=3D401 id=3D"=E5=9B=BE=E7=89=87_x0020_1" =
src=3D"cid:image001.png@01D4229F.37E22920"></span><span =
lang=3DEN-US><o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Thanks in advance.<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Best =
Regards.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Aijun Wang<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Network R&amp;D and Operation Support =
Department<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>China Telecom Corporation Limited Beijing Research =
Institute,Beijing, China.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>-----</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=
=B6</span><span lang=3DEN-US>-----<br></span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E5=8F=91=E4=BB=B6=E4=BA=BA</spa=
n><span lang=3DEN-US>: Aijun Wang [mailto:wangaijun@tsinghua.org.cn] =
<br></span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=
=B4</span><span lang=3DEN-US>: 2018</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E5=B9=B4</span><span =
lang=3DEN-US>6</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E6=9C=88</span><span =
lang=3DEN-US>29</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E6=97=A5</span><span =
lang=3DEN-US> 14:30<br></span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E6=94=B6=E4=BB=B6=E4=BA=BA</spa=
n><span lang=3DEN-US>: idr@ietf.org<br></span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E4=B8=BB=E9=A2=98</span><span =
lang=3DEN-US>: [Idr] FW: New Version Notification for =
draft-wang-idr-bgpls-inter-as-topology-ext-01.txt<o:p></o:p></span></p><p=
 class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>Hi, All =
IDRer:<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>We have uploaded the updated version of the draft about =
BGP-LS extension for inter-AS topology retrieval, which addresses the =
valuable comments from Acee and Ketan during IETF 101 meeting in =
London.<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>The draft can be access at <a =
href=3D"https://tools.ietf.org/html/draft-wang-idr-bgpls-inter-as-topolog=
y-ext-01"><span =
style=3D'color:windowtext;text-decoration:none'>https://tools.ietf.org/ht=
ml/draft-wang-idr-bgpls-inter-as-topology-ext-01</span></a><o:p></o:p></s=
pan></p><p class=3DMsoPlainText><span lang=3DEN-US>Any comments and =
suggestions are welcome.<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>Best =
Regards.<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Aijun Wang<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>Network R&amp;D and Operation =
Support Department China Telecom Corporation Limited Beijing Research =
Institute,Beijing, China.<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>-----</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=
=B6</span><span lang=3DEN-US>-----<o:p></o:p></span></p><p =
class=3DMsoPlainText><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E5=8F=91=E4=BB=B6=E4=BA=BA</spa=
n><span lang=3DEN-US>: <a href=3D"mailto:internet-drafts@ietf.org"><span =
style=3D'color:windowtext;text-decoration:none'>internet-drafts@ietf.org<=
/span></a> [<a href=3D"mailto:internet-drafts@ietf.org"><span =
style=3D'color:windowtext;text-decoration:none'>mailto:internet-drafts@ie=
tf.org</span></a>]<o:p></o:p></span></p><p class=3DMsoPlainText><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=
=B4</span><span lang=3DEN-US>: 2018</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E5=B9=B4</span><span =
lang=3DEN-US>6</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E6=9C=88</span><span =
lang=3DEN-US>29</span><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E6=97=A5</span><span =
lang=3DEN-US> 14:14<o:p></o:p></span></p><p class=3DMsoPlainText><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E6=94=B6=E4=BB=B6=E4=BA=BA</spa=
n><span lang=3DEN-US>: Aijun Wang<o:p></o:p></span></p><p =
class=3DMsoPlainText><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>=E4=B8=BB=E9=A2=98</span><span =
lang=3DEN-US>: New Version Notification for =
draft-wang-idr-bgpls-inter-as-topology-ext-01.txt<o:p></o:p></span></p><p=
 class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>A new version of I-D, =
draft-wang-idr-bgpls-inter-as-topology-ext-01.txt<o:p></o:p></span></p><p=
 class=3DMsoPlainText><span lang=3DEN-US>has been successfully submitted =
by Aijun Wang and posted to the IETF repository.<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span =
lang=3DEN-US>Name:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
draft-wang-idr-bgpls-inter-as-topology-ext<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>Revision:=C2=A0 =
01<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Title:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 BGP-LS Extend for =
Inter-AS Topology Retrieval<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>Document =
date:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
2018-06-28<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Group:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Individual =
Submission<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Pages:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 7<o:p></o:p></span></p><p =
class=3DMsoPlainText><span =
lang=3DEN-US>URL:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 <a =
href=3D"https://www.ietf.org/internet-drafts/draft-wang-idr-bgpls-inter-a=
s-topology-ext-01.txt"><span =
style=3D'color:windowtext;text-decoration:none'>https://www.ietf.org/inte=
rnet-drafts/draft-wang-idr-bgpls-inter-as-topology-ext-01.txt</span></a><=
o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Status:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a =
href=3D"https://datatracker.ietf.org/doc/draft-wang-idr-bgpls-inter-as-to=
pology-ext/"><span =
style=3D'color:windowtext;text-decoration:none'>https://datatracker.ietf.=
org/doc/draft-wang-idr-bgpls-inter-as-topology-ext/</span></a><o:p></o:p>=
</span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a =
href=3D"https://tools.ietf.org/html/draft-wang-idr-bgpls-inter-as-topolog=
y-ext-01"><span =
style=3D'color:windowtext;text-decoration:none'>https://tools.ietf.org/ht=
ml/draft-wang-idr-bgpls-inter-as-topology-ext-01</span></a><o:p></o:p></s=
pan></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a =
href=3D"https://datatracker.ietf.org/doc/html/draft-wang-idr-bgpls-inter-=
as-topology-ext"><span =
style=3D'color:windowtext;text-decoration:none'>https://datatracker.ietf.=
org/doc/html/draft-wang-idr-bgpls-inter-as-topology-ext</span></a><o:p></=
o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Diff:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 <a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-wang-idr-bgpls-inter-as=
-topology-ext-01"><span =
style=3D'color:windowtext;text-decoration:none'>https://www.ietf.org/rfcd=
iff?url2=3Ddraft-wang-idr-bgpls-inter-as-topology-ext-01</span></a><o:p><=
/o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>Abstract:<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>=C2=A0=C2=A0 This document =
describes the process to build BGP-LS key parameters =
in<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 Native IP multi-domain scenario and defines =
some new inter-AS TE<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 related TLVs for BGP-LS to let SDN controller =
retrieve the network<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 topology automatically under various =
environments.<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 Such process and extension can expand the =
usage of BGP-LS protocol to<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US>=C2=A0=C2=A0 multi- domain, =
enable the network operator to collect the =
connection<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 relationship between different AS domains and =
then calculate the<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 overall network topology automatically based =
on the information<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0 provided by BGP-LS =
protocol.<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<o:p=
></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>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.<o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US>The IETF Secretariat<o:p></o:p></span></p><p =
class=3DMsoPlainText><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoPlainText><span =
lang=3DEN-US>_______________________________________________<o:p></o:p></=
span></p><p class=3DMsoPlainText><span lang=3DEN-US>Idr mailing =
list<o:p></o:p></span></p><p class=3DMsoPlainText><span lang=3DEN-US><a =
href=3D"mailto:Idr@ietf.org"><span =
style=3D'color:windowtext;text-decoration:none'>Idr@ietf.org</span></a><o=
:p></o:p></span></p><p class=3DMsoPlainText><span lang=3DEN-US><a =
href=3D"https://www.ietf.org/mailman/listinfo/idr"><span =
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From nobody Tue Jul 24 04:09:48 2018
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Subject: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
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Reviewer: Stewart Bryant
Review result: Has Issues

This is basically a well written draft, although it has has a lots of spelling
mistakes and needs to passed through a spell checker before a further version
is uploaded.

However, I have a number of issues that the chairs and authors should consider
before deciding how to proceed.

The first question to ask is whether the work belongs in RTGWG or in IDR since
with the exception of the reference to  the optimization described in
draft-templin-aerolink-82  this is a pure BGP solution. This is something that
the RTGWG chairs should discuss with the IDR chairs. They should also discuss
whether the draft needs to be looked at by a BGP specialist before RTGWG adopts
it.

The approach of building an overlay to separate the network from the main BGP
system is a sound one, indeed from both the numbers and a security point of
view, it would appear to be  essential in a safety critical application such as
this. What bothers me is whether the author is underestimating the risk of
running an application such as this over the public Internet. Whilst as they
explain in the security section, high profile civil users do understand how to
mitigate risk and minimize the effect of attack, none of these organizations
are as large a target as civil aviation flight safety, and thus I would expect
considerable resources, even to nation state level, to be directed at the
attachment points. Hopefully ICAO fully understands the risks in running this
on the public Internet as proposed. If ever there were an application for
inter-domain network slicing, this is it.

There is a suggestion in section 3 that for reasons of cost, globally unique
ASNs would not be used. It is difficult to believe that cost is an issue in an
SoF system. What is surely needed is the most robust approach, which in the 
long term is usually the cheapest anyway. Using global identifiers minimizes
the possibility of error and issues if ever there is a routing leak, and thus
the decision on whether to use private or global identifiers needs some careful
thought beyond that expressed in this version of the draft.

I am worried about the text towards the end of section three which proposes
splitting the network into two or more disjoint systems, since that will surely
lead to operation and integration issues.

In section 6 consideration is given to scaling the core, which looks basically
under control for the existing flight profile, but with relatively little
headroom for expansion.  Given the rise in UAVs, that will surely need to be
integrated into a common flight safety system, I am concerned as to whether the
authors have allowed sufficient room for expansion. Again hopefully the flight
specialists have taken this into account and this is not a problem.

Related to the above, presumably flight density if not uniform and the authors
have satisfied themselves with the scaling of the stub areas.



From nobody Tue Jul 24 12:54:18 2018
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Hello Stewart,

Thank you for your effort in reviewing the document. Please see below for
follow-up discussion:

Fred

> -----Original Message-----
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Stewart Bryant
> Sent: Tuesday, July 24, 2018 4:10 AM
> To: rtg-dir@ietf.org
> Cc: idr@ietf.org; rtgwg-chairs@ietf.org; draft-templin-atn-bgp.all@ietf.o=
rg; idr-chairs@ietf.org; rtgwg@ietf.org
> Subject: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
>=20
> Reviewer: Stewart Bryant
> Review result: Has Issues
>=20
> This is basically a well written draft, although it has has a lots of spe=
lling
> mistakes and needs to passed through a spell checker before a further ver=
sion
> is uploaded.

Certainly we will fix that; apologies if it impacted the readability.

> However, I have a number of issues that the chairs and authors should con=
sider
> before deciding how to proceed.
>=20
> The first question to ask is whether the work belongs in RTGWG or in IDR =
since
> with the exception of the reference to  the optimization described in
> draft-templin-aerolink-82  this is a pure BGP solution. This is something=
 that
> the RTGWG chairs should discuss with the IDR chairs. They should also dis=
cuss
> whether the draft needs to be looked at by a BGP specialist before RTGWG =
adopts
> it.

The document has been presented at RTGWG at three different IETF meetings
now and seems to have been well received there. So, we would like to see it
become an RTGWG working group item so we would not have to start the
socialization process over again, but your point is well taken. I do not ha=
ve
enough experience with routing area working groups to understand all of
the implications, so any guidance would be appreciated.=20

> The approach of building an overlay to separate the network from the main=
 BGP
> system is a sound one, indeed from both the numbers and a security point =
of
> view, it would appear to be  essential in a safety critical application s=
uch as
> this. What bothers me is whether the author is underestimating the risk o=
f
> running an application such as this over the public Internet. Whilst as t=
hey
> explain in the security section, high profile civil users do understand h=
ow to
> mitigate risk and minimize the effect of attack, none of these organizati=
ons
> are as large a target as civil aviation flight safety, and thus I would e=
xpect
> considerable resources, even to nation state level, to be directed at the
> attachment points. Hopefully ICAO fully understands the risks in running =
this
> on the public Internet as proposed. If ever there were an application for
> inter-domain network slicing, this is it.

For civil aviation, this is indeed a critical consideration. On the open pu=
blic
Internet, for example, although IPsec could be used to establish secure
tunnels other threat vectors such as DDoS need to be considered. In my
understanding, ICAO is thinking about an underlay network comprising
secured physical links (e.g., fiber) and/or constructs like SD-WAN. But,
the construction of the underlay I think is something that has been
taken for granted and as you observe is pivotal to the design security.

> There is a suggestion in section 3 that for reasons of cost, globally uni=
que
> ASNs would not be used. It is difficult to believe that cost is an issue =
in an
> SoF system. What is surely needed is the most robust approach, which in t=
he
> long term is usually the cheapest anyway. Using global identifiers minimi=
zes
> the possibility of error and issues if ever there is a routing leak, and =
thus
> the decision on whether to use private or global identifiers needs some c=
areful
> thought beyond that expressed in this version of the draft.

I don't mind dropping the assertion that private AS numbers could be used.
As you say, there is probably no downside to procuring real global AS
numbers up front even if the overlay is never connected to the global
public Internet.

> I am worried about the text towards the end of section three which propos=
es
> splitting the network into two or more disjoint systems, since that will =
surely
> lead to operation and integration issues.

Looking at that text with fresh eyes, I can see that a rewrite would help
bring across the point we are trying to make. What we want to have is
a means for supporting multiple independent RIBs and bounding the
numbers of prefixes each RIB will be sized to carry. So, if each RIB
supported up to 1M prefixes and we had 1K RIBs, we would be able
to service 1B prefixes or even a bit more. Does that help clarify? If so,
I will consult with co-authors to improve that text.

> In section 6 consideration is given to scaling the core, which looks basi=
cally
> under control for the existing flight profile, but with relatively little
> headroom for expansion.  Given the rise in UAVs, that will surely need to=
 be
> integrated into a common flight safety system, I am concerned as to wheth=
er the
> authors have allowed sufficient room for expansion. Again hopefully the f=
light
> specialists have taken this into account and this is not a problem.

The upper bound in terms of scaling we were targeting was up to 1B
prefixes carried as BGP routes in order to allow for expansion. You are
right to observe that we are at the advent of wide-scale deployment of
UAVs, but this network would be only for those UAVs that fly to, from
or through airspace controlled by Air Traffic Controllers (ATCs) - meaning
it would only be for UAVs that take off and land at airports. For the futur=
e,
the types of UAVs that will eventually do that include unmanned cargo
delivery freighters and the like. But, we would only be expecting a few
thousands, ten-thousands, or hundred-thousansds of those; certainly
not millions and millions.

For small UAVs that stay away from the airports, however, there is
potential for many millions of those or more. For them, the FAA and
NASA have a concept known as "Unmanned (air) Traffic Management"
or "UTM". The UTM would need to be a separate network unto itself,
but we believe these same BGP principles could apply there.

> Related to the above, presumably flight density if not uniform and the au=
thors
> have satisfied themselves with the scaling of the stub areas.
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


From nobody Wed Jul 25 02:13:49 2018
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To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
Cc: "idr@ietf.org" <idr@ietf.org>, "rtgwg-chairs@ietf.org" <rtgwg-chairs@ietf.org>, "draft-templin-atn-bgp.all@ietf.org" <draft-templin-atn-bgp.all@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
References: <153243058668.22562.6511891462599952686@ietfa.amsl.com> <a6c05a6526184066bb0435131b8bfc54@XCH15-06-08.nw.nos.boeing.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
Message-ID: <7864a95d-754a-2bb9-d1b6-810202eeb0a7@gmail.com>
Date: Wed, 25 Jul 2018 10:13:31 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/ebfvw09B28StHeDbrDdQrZzLNC4>
Subject: Re: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
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On 24/07/2018 20:53, Templin (US), Fred L wrote:
> Hello Stewart,
>
> Thank you for your effort in reviewing the document. Please see below for
> follow-up discussion:
>
> Fred
>
>> -----Original Message-----
>> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Stewart Bryant
>> Sent: Tuesday, July 24, 2018 4:10 AM
>> To: rtg-dir@ietf.org
>> Cc: idr@ietf.org; rtgwg-chairs@ietf.org; draft-templin-atn-bgp.all@ietf.org; idr-chairs@ietf.org; rtgwg@ietf.org
>> Subject: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
>>
>> Reviewer: Stewart Bryant
>> Review result: Has Issues
>>
>> This is basically a well written draft, although it has has a lots of spelling
>> mistakes and needs to passed through a spell checker before a further version
>> is uploaded.
> Certainly we will fix that; apologies if it impacted the readability.
>
>> However, I have a number of issues that the chairs and authors should consider
>> before deciding how to proceed.
>>
>> The first question to ask is whether the work belongs in RTGWG or in IDR since
>> with the exception of the reference to  the optimization described in
>> draft-templin-aerolink-82  this is a pure BGP solution. This is something that
>> the RTGWG chairs should discuss with the IDR chairs. They should also discuss
>> whether the draft needs to be looked at by a BGP specialist before RTGWG adopts
>> it.
> The document has been presented at RTGWG at three different IETF meetings
> now and seems to have been well received there. So, we would like to see it
> become an RTGWG working group item so we would not have to start the
> socialization process over again, but your point is well taken. I do not have
> enough experience with routing area working groups to understand all of
> the implications, so any guidance would be appreciated.

Actually it might also be a candidate for BESS (BGP enabled services).

This is a chair/AD decision as much as anything, and they are normally 
guided by where
the required expertise is.

>> The approach of building an overlay to separate the network from the main BGP
>> system is a sound one, indeed from both the numbers and a security point of
>> view, it would appear to be  essential in a safety critical application such as
>> this. What bothers me is whether the author is underestimating the risk of
>> running an application such as this over the public Internet. Whilst as they
>> explain in the security section, high profile civil users do understand how to
>> mitigate risk and minimize the effect of attack, none of these organizations
>> are as large a target as civil aviation flight safety, and thus I would expect
>> considerable resources, even to nation state level, to be directed at the
>> attachment points. Hopefully ICAO fully understands the risks in running this
>> on the public Internet as proposed. If ever there were an application for
>> inter-domain network slicing, this is it.
> For civil aviation, this is indeed a critical consideration. On the open public
> Internet, for example, although IPsec could be used to establish secure
> tunnels other threat vectors such as DDoS need to be considered. In my
> understanding, ICAO is thinking about an underlay network comprising
> secured physical links (e.g., fiber) and/or constructs like SD-WAN. But,
> the construction of the underlay I think is something that has been
> taken for granted and as you observe is pivotal to the design security.
Indeed, I would have expected this to be on a secure network of some 
sort either purely
private or some form of VPN. However, I am sure I read in your text that 
you were
considering using the Public Internet much in the way of SD-WAN.

>
>> There is a suggestion in section 3 that for reasons of cost, globally unique
>> ASNs would not be used. It is difficult to believe that cost is an issue in an
>> SoF system. What is surely needed is the most robust approach, which in the
>> long term is usually the cheapest anyway. Using global identifiers minimizes
>> the possibility of error and issues if ever there is a routing leak, and thus
>> the decision on whether to use private or global identifiers needs some careful
>> thought beyond that expressed in this version of the draft.
> I don't mind dropping the assertion that private AS numbers could be used.
> As you say, there is probably no downside to procuring real global AS
> numbers up front even if the overlay is never connected to the global
> public Internet.
>
>> I am worried about the text towards the end of section three which proposes
>> splitting the network into two or more disjoint systems, since that will surely
>> lead to operation and integration issues.
> Looking at that text with fresh eyes, I can see that a rewrite would help
> bring across the point we are trying to make. What we want to have is
> a means for supporting multiple independent RIBs and bounding the
> numbers of prefixes each RIB will be sized to carry. So, if each RIB
> supported up to 1M prefixes and we had 1K RIBs, we would be able
> to service 1B prefixes or even a bit more. Does that help clarify? If so,
> I will consult with co-authors to improve that text.

Wow, are you sure that such a system is buildable?

What you seem to be building is a huge unaggregated routing system. 
People have considered that before and found that it was 
unimplimentatble. Remember that for every unaggregated prefix in the RIB 
you need an entry in the FIB. The FIB in a core router is high speed 
(expensive) memory and will be replicated on every line card.

I think that you really need to discuss your scaling requirements with 
some hardware
vendors to verify that the design you propose can support the required 
aircraft
population over the expected lifetime of the system.

What I suspect that you need is some sort of formal hierarchy or 
layering in the system to support
long term scaling, and that is going to be a lot easier if it is 
explicitly designed in on day one.

>
>> In section 6 consideration is given to scaling the core, which looks basically
>> under control for the existing flight profile, but with relatively little
>> headroom for expansion.  Given the rise in UAVs, that will surely need to be
>> integrated into a common flight safety system, I am concerned as to whether the
>> authors have allowed sufficient room for expansion. Again hopefully the flight
>> specialists have taken this into account and this is not a problem.
> The upper bound in terms of scaling we were targeting was up to 1B
> prefixes carried as BGP routes in order to allow for expansion. You are
> right to observe that we are at the advent of wide-scale deployment of
> UAVs, but this network would be only for those UAVs that fly to, from
> or through airspace controlled by Air Traffic Controllers (ATCs) - meaning
> it would only be for UAVs that take off and land at airports.
Well, you are the application expert here, but that seems to be a 
critical assumption
that you need to test in multiple geographies. Thinking about the London 
airports, that
is quite a restriction.

> For the future,
> the types of UAVs that will eventually do that include unmanned cargo
> delivery freighters and the like. But, we would only be expecting a few
> thousands, ten-thousands, or hundred-thousansds of those; certainly
> not millions and millions.
I am always reminded that when IPv4 was designed, and (in much the same 
era Ethernet)
their address sizes were an approximation to infinity. They are now a 
long way from infinity.
This will be an expensive system to replace so it needs migration path 
to its infinity.

>
> For small UAVs that stay away from the airports, however, there is
> potential for many millions of those or more. For them, the FAA and
> NASA have a concept known as "Unmanned (air) Traffic Management"
> or "UTM". The UTM would need to be a separate network unto itself,
> but we believe these same BGP principles could apply there.
>

Best regards

Stewart


From nobody Wed Jul 25 14:13:32 2018
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Date: Wed, 25 Jul 2018 14:13:25 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Stewart Bryant <stewart.bryant@gmail.com>, "Templin (US), Fred L" <Fred.L.Templin@boeing.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "idr@ietf.org" <idr@ietf.org>, "rtgwg-chairs@ietf.org" <rtgwg-chairs@ietf.org>, "draft-templin-atn-bgp.all@ietf.org" <draft-templin-atn-bgp.all@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
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Thread-Topic: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
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Subject: Re: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
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RTGWG chair hat on

I believe we have reached the agreement to adopt the draft in RTGWG, as it =
doesn=E2=80=99t bring any changes to the protocol and describes architectural aspe=
cts of the solution.
Fred - please work with Stewart on addressing all the comments raised and i=
f there's consensus in wg we will be proceeding with the adoption.=20

Cheers,
Jeff

=EF=BB=BFOn 7/25/18, 02:13, "Stewart Bryant" <stewart.bryant@gmail.com> wrote:

   =20
   =20
    On 24/07/2018 20:53, Templin (US), Fred L wrote:
    > Hello Stewart,
    >
    > Thank you for your effort in reviewing the document. Please see below=
 for
    > follow-up discussion:
    >
    > Fred
    >
    >> -----Original Message-----
    >> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Stewart Bryant
    >> Sent: Tuesday, July 24, 2018 4:10 AM
    >> To: rtg-dir@ietf.org
    >> Cc: idr@ietf.org; rtgwg-chairs@ietf.org; draft-templin-atn-bgp.all@i=
etf.org; idr-chairs@ietf.org; rtgwg@ietf.org
    >> Subject: [Idr] Rtgdir early review of draft-templin-atn-bgp-07
    >>
    >> Reviewer: Stewart Bryant
    >> Review result: Has Issues
    >>
    >> This is basically a well written draft, although it has has a lots o=
f spelling
    >> mistakes and needs to passed through a spell checker before a furthe=
r version
    >> is uploaded.
    > Certainly we will fix that; apologies if it impacted the readability.
    >
    >> However, I have a number of issues that the chairs and authors shoul=
d consider
    >> before deciding how to proceed.
    >>
    >> The first question to ask is whether the work belongs in RTGWG or in=
 IDR since
    >> with the exception of the reference to  the optimization described i=
n
    >> draft-templin-aerolink-82  this is a pure BGP solution. This is some=
thing that
    >> the RTGWG chairs should discuss with the IDR chairs. They should als=
o discuss
    >> whether the draft needs to be looked at by a BGP specialist before R=
TGWG adopts
    >> it.
    > The document has been presented at RTGWG at three different IETF meet=
ings
    > now and seems to have been well received there. So, we would like to =
see it
    > become an RTGWG working group item so we would not have to start the
    > socialization process over again, but your point is well taken. I do =
not have
    > enough experience with routing area working groups to understand all =
of
    > the implications, so any guidance would be appreciated.
   =20
    Actually it might also be a candidate for BESS (BGP enabled services).
   =20
    This is a chair/AD decision as much as anything, and they are normally=20
    guided by where
    the required expertise is.
   =20
    >> The approach of building an overlay to separate the network from the=
 main BGP
    >> system is a sound one, indeed from both the numbers and a security p=
oint of
    >> view, it would appear to be  essential in a safety critical applicat=
ion such as
    >> this. What bothers me is whether the author is underestimating the r=
isk of
    >> running an application such as this over the public Internet. Whilst=
 as they
    >> explain in the security section, high profile civil users do underst=
and how to
    >> mitigate risk and minimize the effect of attack, none of these organ=
izations
    >> are as large a target as civil aviation flight safety, and thus I wo=
uld expect
    >> considerable resources, even to nation state level, to be directed a=
t the
    >> attachment points. Hopefully ICAO fully understands the risks in run=
ning this
    >> on the public Internet as proposed. If ever there were an applicatio=
n for
    >> inter-domain network slicing, this is it.
    > For civil aviation, this is indeed a critical consideration. On the o=
pen public
    > Internet, for example, although IPsec could be used to establish secu=
re
    > tunnels other threat vectors such as DDoS need to be considered. In m=
y
    > understanding, ICAO is thinking about an underlay network comprising
    > secured physical links (e.g., fiber) and/or constructs like SD-WAN. B=
ut,
    > the construction of the underlay I think is something that has been
    > taken for granted and as you observe is pivotal to the design securit=
y.
    Indeed, I would have expected this to be on a secure network of some=20
    sort either purely
    private or some form of VPN. However, I am sure I read in your text tha=
t=20
    you were
    considering using the Public Internet much in the way of SD-WAN.
   =20
    >
    >> There is a suggestion in section 3 that for reasons of cost, globall=
y unique
    >> ASNs would not be used. It is difficult to believe that cost is an i=
ssue in an
    >> SoF system. What is surely needed is the most robust approach, which=
 in the
    >> long term is usually the cheapest anyway. Using global identifiers m=
inimizes
    >> the possibility of error and issues if ever there is a routing leak,=
 and thus
    >> the decision on whether to use private or global identifiers needs s=
ome careful
    >> thought beyond that expressed in this version of the draft.
    > I don't mind dropping the assertion that private AS numbers could be =
used.
    > As you say, there is probably no downside to procuring real global AS
    > numbers up front even if the overlay is never connected to the global
    > public Internet.
    >
    >> I am worried about the text towards the end of section three which p=
roposes
    >> splitting the network into two or more disjoint systems, since that =
will surely
    >> lead to operation and integration issues.
    > Looking at that text with fresh eyes, I can see that a rewrite would =
help
    > bring across the point we are trying to make. What we want to have is
    > a means for supporting multiple independent RIBs and bounding the
    > numbers of prefixes each RIB will be sized to carry. So, if each RIB
    > supported up to 1M prefixes and we had 1K RIBs, we would be able
    > to service 1B prefixes or even a bit more. Does that help clarify? If=
 so,
    > I will consult with co-authors to improve that text.
   =20
    Wow, are you sure that such a system is buildable?
   =20
    What you seem to be building is a huge unaggregated routing system.=20
    People have considered that before and found that it was=20
    unimplimentatble. Remember that for every unaggregated prefix in the RI=
B=20
    you need an entry in the FIB. The FIB in a core router is high speed=20
    (expensive) memory and will be replicated on every line card.
   =20
    I think that you really need to discuss your scaling requirements with=20
    some hardware
    vendors to verify that the design you propose can support the required=20
    aircraft
    population over the expected lifetime of the system.
   =20
    What I suspect that you need is some sort of formal hierarchy or=20
    layering in the system to support
    long term scaling, and that is going to be a lot easier if it is=20
    explicitly designed in on day one.
   =20
    >
    >> In section 6 consideration is given to scaling the core, which looks=
 basically
    >> under control for the existing flight profile, but with relatively l=
ittle
    >> headroom for expansion.  Given the rise in UAVs, that will surely ne=
ed to be
    >> integrated into a common flight safety system, I am concerned as to =
whether the
    >> authors have allowed sufficient room for expansion. Again hopefully =
the flight
    >> specialists have taken this into account and this is not a problem.
    > The upper bound in terms of scaling we were targeting was up to 1B
    > prefixes carried as BGP routes in order to allow for expansion. You a=
re
    > right to observe that we are at the advent of wide-scale deployment o=
f
    > UAVs, but this network would be only for those UAVs that fly to, from
    > or through airspace controlled by Air Traffic Controllers (ATCs) - me=
aning
    > it would only be for UAVs that take off and land at airports.
    Well, you are the application expert here, but that seems to be a=20
    critical assumption
    that you need to test in multiple geographies. Thinking about the Londo=
n=20
    airports, that
    is quite a restriction.
   =20
    > For the future,
    > the types of UAVs that will eventually do that include unmanned cargo
    > delivery freighters and the like. But, we would only be expecting a f=
ew
    > thousands, ten-thousands, or hundred-thousansds of those; certainly
    > not millions and millions.
    I am always reminded that when IPv4 was designed, and (in much the same=
=20
    era Ethernet)
    their address sizes were an approximation to infinity. They are now a=20
    long way from infinity.
    This will be an expensive system to replace so it needs migration path=20
    to its infinity.
   =20
    >
    > For small UAVs that stay away from the airports, however, there is
    > potential for many millions of those or more. For them, the FAA and
    > NASA have a concept known as "Unmanned (air) Traffic Management"
    > or "UTM". The UTM would need to be a separate network unto itself,
    > but we believe these same BGP principles could apply there.
    >
   =20
    Best regards
   =20
    Stewart
   =20
   =20



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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Stewart Bryant <stewart.bryant@gmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
CC: "idr@ietf.org" <idr@ietf.org>, "rtgwg-chairs@ietf.org" <rtgwg-chairs@ietf.org>, "draft-templin-atn-bgp.all@ietf.org" <draft-templin-atn-bgp.all@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
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From: Rob Shakir <rjs@rob.sh>
Date: Sat, 28 Jul 2018 20:10:42 -0700
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To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
Cc: Gert Doering <gert@space.net>, idr wg <idr@ietf.org>
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Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
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(Full disclosure: I have spent a lot of time on gRPC-based streaming
telemetry and have deployed it at scale.)

SNMP is clearly broken for this application, we need event-based push for
changes to a subset of the data set for any kind of efficiency. The scale
of periodically streaming BGP-RIB contents is too much for most systems,
let alone needing to do it with client-initiated polling.

Streaming telemetry absolutely needs reliable delivery for event-based
delivery, otherwise there is a significant concern around loss of events.
My colleague Carl Lebsack and I spoke at NANOG around our work on ST,
further details: slides
<https://pc.nanog.org/static/published/meetings/NANOG73/1677/20180625_Shaki=
r_Snmp_Is_Dead_v1.pdf>,
video <https://youtu.be/McNm_WfQTHw>. There are a number of reasons that
the implementation of ST can be more robust than SNMP -- particularly,
these are focused around giving the device (target) more control over how
it generates and sends data.

Personally, I do not really buy the "BGP has a lower operational overhead
for deployment" point. Yes, it is more familiar, but the BGP-LS collector
is unlikely to be a familiar vendor device in any operational environment
(otherwise, how do I pull this data into another system?). This means that
there is still overhead of deploying a new BGPd somewhere off-device that
needs to be dealt with, and the configuration thereof. In my experience,
this overhead is significantly greater than "do I need to understand
another transport?". As I recall, there were few operational voices in IDR
at the time of BGP-LS saying this... it seems to me that we might have been
swayed more by the fact that the folks involved in that discussion had BGP
code written :-)

I continue to think that overloading BGP to carry this information wasn't
the right choice for the problem space discussed, and am unclear that we
made a good architectural decision for the "distributing IGP information
across multiple areas" case Jeff mentions above. There are still (to me)
significant robustness and fate-sharing concerns that make BGP-LS
undesirable for deployment (I raised these at the time of adoption
<https://www.ietf.org/mail-archive/web/idr/current/msg06565.html>, and
AFAICS nothing has really changed since).

I would encourage moving towards a single channel for network telemetry -
including BGP-LS - being the right way forward. Particularly, given that we
do not need protocol action and drafts to be published to put that data
there. Right now, we've just created an industry in BGP-LS-support-for-foo
drafts in IDR based on each doc in LSR.

Just my $0.02, =C2=A30.02, and =E2=82=AC0.02,
r.

On Sat, 21 Jul 2018 at 19:01 Jakob Heitz (jheitz) <jheitz=3D
40cisco.com@dmarc.ietf.org> wrote:

> Yes.
>
> SNMP is pull based. That means the management system has to ask for the
> routing table.
> The router sends the whole table, even if nothing or very little has
> changed.
> A huge waste of resources. It makes things horribly slow.
> SNMP is udp based, so packets drop.
> In many cases, the OID structure of SNMP is a transpose of the way the
> data is stored
> in the router, making data retrieval very inefficient.
> SNMP has no ability to snapshot a set of data: each item is independent o=
f
> the next. Statistics change as they are being sent. One statistic will be
> inconsistent with the next one, because it was sampled at a different tim=
e.
>
> Streaming telemetry has choices of transport and push/pull.
> The best way is push mode and a tcp based transport, like GRPC.
> Routes are only sent when they change. Unchanged data is not sent.
>
> Frequently changing statistics may be better retrieved using the pull
> model.
>
> Regards,
> Jakob.
>
>
> -----Original Message-----
> From: Gert Doering <gert@space.net>
> Sent: Saturday, July 21, 2018 1:57 PM
> To: Jakob Heitz (jheitz) <jheitz@cisco.com>
> Cc: Randy Bush <randy@psg.com>; idr wg <idr@ietf.org>
> Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...
>
> Hi,
>
> On Sat, Jul 21, 2018 at 01:24:51AM +0000, Jakob Heitz (jheitz) wrote:
> > And they open large horrible bugs against it, which is why telemetry wa=
s
> invented.
>
> And these large horrible bugs disappear over night by wrapping existing
> information in a new encoding and a new transport?
>
> Impressive :)
>
> Gert Doering
>         -- NetMaster
> --
> have you enabled IPv6 on something today...?
>
> SpaceNet AG                      Vorstand: Sebastian v. Bomhard, Michael
> Emmer
> Joseph-Dollinger-Bogen 14        Aufsichtsratsvors.: A. Grundner-Culemann
> D-80807 Muenchen                 HRB: 136055 (AG Muenchen)
> Tel: +49 (0)89/32356-444 <+49%2089%2032356444>         USt-IdNr.:
> DE813185279
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

--0000000000005a0d5f05721ab165
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">(Full disclosure: I have spent a lot of time on gRPC-based=
 streaming telemetry and have deployed it at scale.)<div><br></div><div>SNM=
P is clearly broken for this application, we need event-based push for chan=
ges to a subset of the data set for any kind of efficiency. The scale of pe=
riodically streaming BGP-RIB contents is too much for most systems, let alo=
ne needing to do it with client-initiated polling.</div><div><br></div><div=
>Streaming telemetry absolutely needs reliable delivery for event-based del=
ivery, otherwise there is a significant concern around loss of events. My c=
olleague Carl Lebsack and I spoke at NANOG around our work on ST, further d=
etails: <a href=3D"https://pc.nanog.org/static/published/meetings/NANOG73/1=
677/20180625_Shakir_Snmp_Is_Dead_v1.pdf">slides</a>, <a href=3D"https://you=
tu.be/McNm_WfQTHw">video</a>. There are a number of reasons that the implem=
entation of ST can be more robust than SNMP -- particularly, these are focu=
sed around giving the device (target) more control over how it generates an=
d sends data.=C2=A0</div><div><br></div><div>Personally, I do not really bu=
y the &quot;BGP has a lower operational overhead for deployment&quot; point=
. Yes, it is more familiar, but the BGP-LS collector is unlikely to be a fa=
miliar vendor device in any operational environment (otherwise, how do I pu=
ll this data into another system?). This means that there is still overhead=
 of deploying a new BGPd somewhere off-device that needs to be dealt with, =
and the configuration thereof. In my experience, this overhead is significa=
ntly greater than &quot;do I need to understand another transport?&quot;. A=
s I recall, there were few operational voices in IDR at the time of BGP-LS =
saying this... it seems to me that we might have been swayed more by the fa=
ct that the folks involved in that discussion had BGP code written :-)</div=
><div><br></div><div>I continue to think that overloading BGP to carry this=
 information wasn&#39;t the right choice for the problem space discussed, a=
nd am unclear that we made a good architectural decision for the &quot;dist=
ributing IGP information across multiple areas&quot; case Jeff mentions abo=
ve. There are still (to me) significant robustness and fate-sharing concern=
s that make BGP-LS undesirable for deployment (I raised these at the <a hre=
f=3D"https://www.ietf.org/mail-archive/web/idr/current/msg06565.html">time =
of adoption</a>, and AFAICS nothing has really changed since).</div><div><b=
r></div><div>I would encourage moving towards a single channel for network =
telemetry - including BGP-LS - being the right way forward. Particularly, g=
iven that we do not need protocol action and drafts to be published to put =
that data there. Right now, we&#39;ve just created an industry in BGP-LS-su=
pport-for-foo drafts in IDR based on each doc in LSR.</div><div><br></div><=
div>Just my $0.02, =C2=A30.02, and =E2=82=AC0.02,</div><div>r.</div></div><=
br><div class=3D"gmail_quote"><div dir=3D"ltr">On Sat, 21 Jul 2018 at 19:01=
 Jakob Heitz (jheitz) &lt;jheitz=3D<a href=3D"mailto:40cisco.com@dmarc.ietf=
.org">40cisco.com@dmarc.ietf.org</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">Yes.<br>
<br>
SNMP is pull based. That means the management system has to ask for the rou=
ting table.<br>
The router sends the whole table, even if nothing or very little has change=
d.<br>
A huge waste of resources. It makes things horribly slow.<br>
SNMP is udp based, so packets drop.<br>
In many cases, the OID structure of SNMP is a transpose of the way the data=
 is stored<br>
in the router, making data retrieval very inefficient.<br>
SNMP has no ability to snapshot a set of data: each item is independent of =
the next. Statistics change as they are being sent. One statistic will be i=
nconsistent with the next one, because it was sampled at a different time.<=
br>
<br>
Streaming telemetry has choices of transport and push/pull.<br>
The best way is push mode and a tcp based transport, like GRPC.<br>
Routes are only sent when they change. Unchanged data is not sent.<br>
<br>
Frequently changing statistics may be better retrieved using the pull model=
.<br>
<br>
Regards,<br>
Jakob.<br>
<br>
<br>
-----Original Message-----<br>
From: Gert Doering &lt;<a href=3D"mailto:gert@space.net" target=3D"_blank">=
gert@space.net</a>&gt; <br>
Sent: Saturday, July 21, 2018 1:57 PM<br>
To: Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"=
_blank">jheitz@cisco.com</a>&gt;<br>
Cc: Randy Bush &lt;<a href=3D"mailto:randy@psg.com" target=3D"_blank">randy=
@psg.com</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_bla=
nk">idr@ietf.org</a>&gt;<br>
Subject: Re: [Idr] BGP-LS vs gRPC/gpb or...<br>
<br>
Hi,<br>
<br>
On Sat, Jul 21, 2018 at 01:24:51AM +0000, Jakob Heitz (jheitz) wrote:<br>
&gt; And they open large horrible bugs against it, which is why telemetry w=
as invented. <br>
<br>
And these large horrible bugs disappear over night by wrapping existing<br>
information in a new encoding and a new transport?<br>
<br>
Impressive :)<br>
<br>
Gert Doering<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 -- NetMaster<br>
-- <br>
have you enabled IPv6 on something today...?<br>
<br>
SpaceNet AG=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 Vorstand: Sebastian v. Bomhard, Michael Emmer<br>
Joseph-Dollinger-Bogen 14=C2=A0 =C2=A0 =C2=A0 =C2=A0 Aufsichtsratsvors.: A.=
 Grundner-Culemann<br>
D-80807 Muenchen=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0HRB: 136055 (AG Muenchen)<br>
Tel: <a href=3D"tel:+49%2089%2032356444" value=3D"+498932356444" target=3D"=
_blank">+49 (0)89/32356-444</a>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0USt-IdNr.:=
 DE813185279<br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/idr</a><br>
</blockquote></div>

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From: Rob Shakir <rjs@rob.sh>
Date: Sat, 28 Jul 2018 20:15:04 -0700
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To: "Stone, Andrew (Nokia - CA/Ottawa)" <andrew.stone@nokia.com>
Cc: "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] capability discovery - draft-ietf-idr-segment-routing-te-policy
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Andrew,

I'm not sure this is a new problem. For example, if I am performing route
injection from some external source to an RR, I have no knowledge that the
downstream systems that I wish to advertise it to support the <AFI,SAFI>
that I'm injecting for. There must be some other means of discovery.

There are other problems with injecting SR-TE policies via an RR
infrastructure -- consider that even session failure is undetectable in
this scenario (the remote device might have gone away entirely, or not have
a session to the RR). To me, this is simply something that we need to
consider the deployment scenarios for (a good use for the "Operational
Considerations" of this draft), rather than adding protocol machinery in
BGP for. The mechanism to discover liveliness, and whether a policy is
programmed on the target node should be solved generically.

Cheers,
r.

On Fri, 20 Jul 2018 at 12:54 Stone, Andrew (Nokia - CA/Ottawa) <
andrew.stone@nokia.com> wrote:

> Hi all,
>
>
>
> Comment raised in IDR meeting regarding
> draft-ietf-idr-segment-routing-te-policy:
>
>
>
> Assuming an architecture deployment where a controller is peered to a RR
> supporting address families bgp-ls and sr-te-policies, how does the
> controller know which downstream routers in the network support BGP
> advertised SR-TE Policies? as this information (peer session address
> families) is being masked by the RR? For example, if the controller wante=
d
> to install a BSID on a transient node in the middle of the network, how
> will the controller know that:
>
>
>
> 1) node in network is currently talking BGP
>
> 2) node supports sr-te-policy address family
>
>
>
> Comparatively to PCEP, the PCEP session and its capability TLVs informs
> the controller of this.
>
>
>
> Advertising SR-TE policy via BGP needs a similar ability or a description
> on how best to address this.
>
>
>
> Some suggestions could include:
>
>
>
>    - perhaps advertising capability inside of BGP-LS
>       - But this means router needs to talk BGP-LS or have to relay it
>       through IGP to reach the BGP-LS speaker, similar to
>       draft-ietf-idr-bgp-ls-segment-routing-msd and
>       draft-ietf-isis-segment-routing-msd
>    - Transient downstream router advertises the capability into using
>    same SAFI as sr-te-policy but a different NLRI with a target of one, m=
any
>    or all controllers
>    - external learning such as via BMP, netconf, statically defined on
>    controller=E2=80=A6 etc?
>
>
>
> Thoughts?
>
>
>
> Thanks
>
> Andrew
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

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<div dir=3D"ltr">Andrew,<div><br></div><div>I&#39;m not sure this is a new =
problem. For example, if I am performing route injection from some external=
 source to an RR, I have no knowledge that the downstream systems that I wi=
sh to advertise it to support the &lt;AFI,SAFI&gt; that I&#39;m injecting f=
or. There must be some other means of discovery.</div><div><br></div><div>T=
here are other problems with injecting SR-TE policies via an RR infrastruct=
ure -- consider that even session failure is undetectable in this scenario =
(the remote device might have gone away entirely, or not have a session to =
the RR). To me, this is simply something that we need to consider the deplo=
yment scenarios for (a good use for the &quot;Operational Considerations&qu=
ot; of this draft), rather than adding protocol machinery in BGP for. The m=
echanism to discover liveliness, and whether a policy is programmed on the =
target node should be solved generically.</div><div><br></div><div>Cheers,<=
/div><div>r.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On =
Fri, 20 Jul 2018 at 12:54 Stone, Andrew (Nokia - CA/Ottawa) &lt;<a href=3D"=
mailto:andrew.stone@nokia.com">andrew.stone@nokia.com</a>&gt; wrote:<br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left=
:1px #ccc solid;padding-left:1ex">







<div bgcolor=3D"white" lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_-7974623295768056136WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Hi a=
ll,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Comm=
ent raised in IDR meeting regarding draft-ietf-idr-segment-routing-te-polic=
y:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Assu=
ming an architecture deployment where a controller is peered to a RR suppor=
ting address families bgp-ls and sr-te-policies, how does the controller kn=
ow which downstream routers in the network
 support BGP advertised SR-TE Policies? as this information (peer session a=
ddress families) is being masked by the RR? For example, if the controller =
wanted to install a BSID on a transient node in the middle of the network, =
how will the controller know that:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">1) n=
ode in network is currently talking BGP<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">2) n=
ode supports sr-te-policy address family<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Comp=
aratively to PCEP, the PCEP session and its capability TLVs informs the con=
troller of this.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Adve=
rtising SR-TE policy via BGP needs a similar ability or a description on ho=
w best to address this.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Some=
 suggestions could include:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<ul style=3D"margin-top:0cm" type=3D"disc">
<li class=3D"m_-7974623295768056136MsoListParagraph" style=3D"margin-left:0=
cm"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">perhaps advertising cap=
ability inside of BGP-LS
<u></u><u></u></span>
<ul style=3D"margin-top:0cm" type=3D"disc">
<li class=3D"m_-7974623295768056136MsoListParagraph" style=3D"margin-left:0=
cm"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">But this means router n=
eeds to talk BGP-LS or have to relay it through IGP to reach the BGP-LS spe=
aker, similar to draft-ietf-idr-bgp-ls-segment-routing-msd
 and draft-ietf-isis-segment-routing-msd<u></u><u></u></span></li></ul>
</li><li class=3D"m_-7974623295768056136MsoListParagraph" style=3D"margin-l=
eft:0cm"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Transient downstre=
am router advertises the capability into using same SAFI as sr-te-policy bu=
t a different NLRI with a target of one, many
 or all controllers<u></u><u></u></span></li><li class=3D"m_-79746232957680=
56136MsoListParagraph" style=3D"margin-left:0cm"><span lang=3D"EN-CA" style=
=3D"font-size:11.0pt">external learning such as via BMP, netconf, staticall=
y defined on controller=E2=80=A6 etc?<u></u><u></u></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Thou=
ghts? <u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt"><u><=
/u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Than=
ks<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA" style=3D"font-size:11.0pt">Andr=
ew <u></u><u></u></span></p>
</div>
</div>

_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/idr</a><br>
</blockquote></div>

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From: "Stone, Andrew (Nokia - CA/Ottawa)" <andrew.stone@nokia.com>
To: Rob Shakir <rjs@rob.sh>
CC: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] capability discovery - draft-ietf-idr-segment-routing-te-policy
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Thread-Topic: [Idr] Fw: WG adoption call for draft-xu-idr-neighbor-autodiscovery(Internet mail)
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Subject: Re: [Idr] Fw: WG adoption call for draft-xu-idr-neighbor-autodiscovery(Internet mail)
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