Re: Fwd: I-D Action: draft-chen-bfd-unsolicited-01.txt

Jeffrey Haas <jhaas@pfrc.org> Mon, 31 July 2017 17:30 UTC

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Date: Mon, 31 Jul 2017 13:30:46 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: rtg-bfd@ietf.org, Enke Chen <enkechen@cisco.com>
Subject: Re: Fwd: I-D Action: draft-chen-bfd-unsolicited-01.txt
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References: <150146797084.17672.9122177940139456062@ietfa.amsl.com> <74377bb1-9c94-2a7b-a4a0-b1b75db99038@cisco.com>
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Working Group,

This draft was briefly mentioned as part of the IDR WG presentation on
RS-BFD that I am a co-author on.  That presentation is supposed to be linked
here, but is not coming up.  Hopefully it's a transient error:

https://datatracker.ietf.org/meeting/99/materials/slides-99-idr-03-idr-rs-bfd-ietf99

A simplified version of the discussion is roughly:
- In Internet Exchange Point environments, monitoring BGP next-hop
  reachability via BFD is desirable.
- Since these next-hops may not be symmetrically distributed in BGP between
  the two end systems via the route server, additional help is needed to
  permit both sides of a normal RFC 5881 session bootstrap itself.

The draft mentioned below attempts to resolve this scenario by permitting a
"wildcard" single-hop BFD session be created for interfaces in environments
such as a this IXP environment.  It may be useful outside of the IXP use case.

-- Jeff

On Sun, Jul 30, 2017 at 07:35:31PM -0700, Enke Chen wrote:
> Hi, Folks:
> 
> Please let us know if you have any comments on the draft.
> 
> Thanks.  -- Enke
> 
> -------- Forwarded Message --------
> Subject: I-D Action: draft-chen-bfd-unsolicited-01.txt
> Date: Sun, 30 Jul 2017 19:26:10 -0700
> From: internet-drafts@ietf.org
> Reply-To: internet-drafts@ietf.org
> To: i-d-announce@ietf.org
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> 
> 
>         Title           : Unsolicited BFD for Sessionless Applications
>         Authors         : Enke Chen
>                           Naiming Shen
>                           Robert Raszuk
> 	Filename        : draft-chen-bfd-unsolicited-01.txt
> 	Pages           : 6
> 	Date            : 2017-07-30
> 
> Abstract:
>    For operational simplification of "sessionless" applications using
>    BFD, in this document we present procedures for "unsolicited BFD"
>    that allow a BFD session to be initiated by only one side, and be
>    established without explicit per-session configuration or
>    registration by the other side (subject to certain per-interface or
>    per-router policies).
> 
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-chen-bfd-unsolicited/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-chen-bfd-unsolicited-01
> https://datatracker.ietf.org/doc/html/draft-chen-bfd-unsolicited-01
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-chen-bfd-unsolicited-01
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
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