Last Call: <draft-ietf-lsr-igp-ureach-prefix-announce-08.txt> (IGP Unreachable Prefix Announcement) to Proposed Standard

The IESG <iesg-secretary@ietf.org> Tue, 10 June 2025 17:16 UTC

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From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce <ietf-announce@ietf.org>
Subject: Last Call: <draft-ietf-lsr-igp-ureach-prefix-announce-08.txt> (IGP Unreachable Prefix Announcement) to Proposed Standard
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Message-ID: <174957580958.3870436.6671753167326154445@dt-datatracker-59b84fc74f-84jsl>
Date: Tue, 10 Jun 2025 10:16:49 -0700
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CC: draft-ietf-lsr-igp-ureach-prefix-announce@ietf.org, james.n.guichard@futurewei.com, lsr-chairs@ietf.org, lsr@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf-announce/4ctgDU5eRthlsD-tgKikGVkG8u8>

The IESG has received a request from the Link State Routing WG (lsr) to
consider the following document: - 'IGP Unreachable Prefix Announcement'
  <draft-ietf-lsr-igp-ureach-prefix-announce-08.txt> as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits final
comments on this action. Please send substantive comments to the
last-call@ietf.org mailing lists by 2025-06-24. Exceptionally, comments may
be sent to iesg@ietf.org instead. In either case, please retain the beginning
of the Subject line to allow automated sorting.

Abstract


   Summarization is often used in multi-area or multi-domain networks to
   improve network efficiency and scalability.  With summarization in
   place, there is a need to signal loss of reachability to an
   individual prefix covered by the summary.  This enables fast
   convergence by steering traffic away from the node which owns the
   prefix and is no longer reachable.

   This document describes how to use the existing protocol mechanisms
   in IS-IS and OSPF, together with the two new flags, to advertise such
   prefix reachability loss.





The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-lsr-igp-ureach-prefix-announce/


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

   https://datatracker.ietf.org/ipr/6079/

Last Call: <draft-ietf-lsr-igp-ureach-prefix-anno… The IESG