From: "Jerome Durand (jerduran)" <jerduran@cisco.com>
To: "idr@ietf.org" <idr@ietf.org>
Thread-Topic: 2 Week WG Adoption call for draft-ymbk-idr-rs-bfd-00 (3/2/2015
 to 3/16/2015)
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Date: Sun, 15 Mar 2015 20:56:52 +0000
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Cc: David Freedman <david.freedman@uk.clara.net>
Subject: [Idr] 2 Week WG Adoption call for draft-ymbk-idr-rs-bfd-00
 (3/2/2015 to 3/16/2015)
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Dear all,

I think draft-ymbk-idr-rs-bfd-00.txt addresses real issues that need to be =
solved somehow and I=92m happy to see work conducted on the topic.

However the approach chosen implies that IXP members rely on a mechanism to=
 be implemented on the route-server, while we believe a direct approach cou=
ld be simpler and quicker to implement, and much more reliable. David Freed=
man and I have worked on finding a solution for quite some time now and we =
are proposing an approach based on BFD, which can be found here:

https://tools.ietf.org/id/draft-jdurand-auto-bfd-00.txt

The Idea is simple and it only requires a basic BFD capability between IXP =
members. Based on the BFD session state of the learnt BGP next-hop, routes =
can be accepted and BFD backed by a member, the decision remains local.

While we elaborated this document we discovered that there are real challen=
ges in the BFD implementation, for example when there is asymmetric routing=
. This is documented in our draft. I believe on the other hand that there i=
s a lack of this information in draft-ymbk-idr-rs-bfd-00 at this stage. we =
would like to see more information on that in future versions.

Thank you,

Jerome Durand
and=20
David Freedman=