On 23/05/2025 03:32, Aijun Wang wrote:
Hi, All:
I must point out that the updated draft doesn't address previous
issues that described in [1].
Especially, the activation of flawed LSInfinity feature(there is
detail analysis for this flawed feature that is defined in OSPF 2328).
And, some updated contents will deteriorate the traffic pattern within
the network.
For example, It says: “ABR or ASBR MUST withdraw the previously
advertised UPA when the reason for which the UPA was generated was lost”.
The above requirement will advertise the specific prefixes within the
network, which will weaken the original summary effect, and attract
the traffic via one or some of ABRs.
no, above is not true, the new text does not say to advertise
reachablity for a summarized prefix, it only talks about removing the
previously advertised UPA.
Please read carefully before commenting.
Peter
[1]: Reasons of abandoning UPA:
https://datatracker.ietf.org/doc/draft-wang-lsr-reasons-of-abandon-upa-proposal/
Best Regards
Aijun Wang
China Telecom
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发送时间: 2025年5月22日21:20
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主题: [Lsr] I-D Action: draft-ietf-lsr-igp-ureach-prefix-announce-06.txt
Internet-Draft draft-ietf-lsr-igp-ureach-prefix-announce-06.txt is now
available. It is a work item of the Link State Routing (LSR) WG of the
IETF.
Title: IGP Unreachable Prefix Announcement
Authors: Peter Psenak
Clarence Filsfils
Daniel Voyer
Shraddha Hegde
Gyan Mishra
Name: draft-ietf-lsr-igp-ureach-prefix-announce-06.txt
Pages: 14
Dates: 2025-05-22
Abstract:
In the presence of summarization, 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 IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-lsr-igp-ureach-prefix-announce/
<https://datatracker.ietf.org/doc/draft-ietf-lsr-igp-ureach-prefix-announce/>
There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-lsr-igp-ureach-prefix-announce-06
<https://datatracker.ietf.org/doc/html/draft-ietf-lsr-igp-ureach-prefix-announce-06>
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-lsr-igp-ureach-prefix-announce-06
<https://author-tools.ietf.org/iddiff?url2=draft-ietf-lsr-igp-ureach-prefix-announce-06>
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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