Re: [Idr] Capability Advertisement in draft-ietf-idr-bgp-extended-messages
Jeffrey Haas <jhaas@pfrc.org> Wed, 31 July 2019 21:14 UTC
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Date: Wed, 31 Jul 2019 17:16:02 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: Alvaro Retana <aretana.ietf@gmail.com>
Cc: "idr@ietf. org" <idr@ietf.org>, idr-chairs@ietf.org, draft-ietf-idr-bgp-extended-messages@ietf.org, Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] Capability Advertisement in draft-ietf-idr-bgp-extended-messages
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On Wed, Jul 31, 2019 at 01:06:04PM -0700, Alvaro Retana wrote: > During the IESG Evaluation, Sue pointed out that we removed the piece of > text below: > > Just to let you know that the text below: > > “A peer which does not advertise this capability MUST NOT send BGP > Extended Messages, and BGP Extended Messages MUST NOT be sent to it.” > > was added due to comments on the IDR WG list from reviewers and operators. > > Given that Extended Messages is a very important extension to BGP, and even > though I didn’t see objections in the thread mentioned above, I want to > confirm one more time that the current text is ok with the WG. I am fine with the current text, although my opinion is nuanced. By requiring bi-directional advertisement of the capability, UPDATEs sent from one can have NOTIFICATIONs of similar size. This avoids some ugly edge conditions that would result from uni-directional advertisement of the capability. The converse argument, which I'm not supporting, is that uni-directional advertisement intentionally lets peers opt-out of receiving extended messages, even it understands them. Let the bi-directional requirement stand. Note that RFC 6793 (4-byte ASes) require bi-directional advertisement. -- Jeff
- [Idr] Capability Advertisement in draft-ietf-idr-… Alvaro Retana
- Re: [Idr] Capability Advertisement in draft-ietf-… Jeffrey Haas
- Re: [Idr] Capability Advertisement in draft-ietf-… Enke Chen (enkechen)
- Re: [Idr] Capability Advertisement in draft-ietf-… Jeffrey Haas
- Re: [Idr] Capability Advertisement in draft-ietf-… Jakob Heitz (jheitz)
- Re: [Idr] Capability Advertisement in draft-ietf-… Enke Chen (enkechen)
- Re: [Idr] Capability Advertisement in draft-ietf-… Enke Chen (enkechen)
- Re: [Idr] Capability Advertisement in draft-ietf-… Jakob Heitz (jheitz)
- Re: [Idr] Capability Advertisement in draft-ietf-… Randy Bush
- Re: [Idr] Capability Advertisement in draft-ietf-… bruno.decraene
- Re: [Idr] Capability Advertisement in draft-ietf-… Randy Bush
- Re: [Idr] Capability Advertisement in draft-ietf-… Robert Raszuk
- Re: [Idr] Capability Advertisement in draft-ietf-… Keyur Patel
- Re: [Idr] Capability Advertisement in draft-ietf-… Jeffrey Haas
- Re: [Idr] Capability Advertisement in draft-ietf-… Susan Hares
- Re: [Idr] Capability Advertisement in draft-ietf-… Alvaro Retana
- Re: [Idr] Capability Advertisement in draft-ietf-… Robert Raszuk
- Re: [Idr] Capability Advertisement in draft-ietf-… Enke Chen (enkechen)
- Re: [Idr] Capability Advertisement in draft-ietf-… Enke Chen (enkechen)
- Re: [Idr] Capability Advertisement in draft-ietf-… Robert Raszuk