Hi Ketan and all,

Thanks for the feedback.

As an individual contributor, I agree that the draft should progress on
standards track.

My question to the authors. When ti-lfa is enabled, if post-convergence
path is feasible (no MSD limitation and other policy restrictions), it
SHOULD be preferred. Is this correct?

Thanks,
Yingzhen


On Tue, Jan 14, 2025 at 9:18 AM Ketan Talaulikar <ketant.i...@gmail.com>
wrote:

> Hi Yingzhen/All,
>
> I realize that I've not responded to this email while discussing the draft
> on other threads.
>
> We are now at v19 of the draft and see some open suggestions from Bruno on
> a couple of threads that are helpful and IMHO should be incorporated. All
> these updates are clarifying the post-convergence aspects. To me all of
> these are clarifications.
>
> The benefits of the use of post-convergence path and the ability with SR
> to provide a backup in any topology (practically true for most deployments
> though theoretically can fail due to MSD limitations in some corner cases)
> have been the key value propositions for TI-LFA. This technology is widely
> implemented and deployed in the networks and I hope the WG can progress
> this document soonish.
>
> I also do not understand the motivation for changing from standards track
> to informational at this stage given that other LFA specifications have
> been standards track.
>
> Thanks,
> Ketan
>
>
> On Sun, Nov 24, 2024 at 4:01 PM Yingzhen Qu <yingzhen.i...@gmail.com>
> wrote:
>
>> Hi all,
>>
>> Since the draft-ietf-rtgwg-segment-routing-ti-lfa version 13 was
>> submitted to the IESG for publication in Feb this year, it has gone through
>> several iterations to address review comments.
>>
>> We'd like to bring the WG's attention that it is no longer a mandatory
>> requirement to follow the post-convergence path. The section 11 in version
>> 13 (Advantages of using the expected post-convergence path during FRR)
>> is now in Appendix A. Ahmed mentioned during his presentation at IETF121
>> that this change was due to hardware limitations (recording:
>> https://www.youtube.com/watch?v=6qVpJsG9nO4), but this is not included
>> in the draft. Whether it is important to follow the post-convergence path
>> is not clearly stated in the draft, or under what circumstances the
>> post-convergence path is recommended and should be followed.
>>
>> We'd like to get the WG's opinion about the change. Please note that
>> currently the draft is Standards Track. Whether it should be kept as
>> Standards Track or moved to Informational should also be considered.
>>
>> Please review the latest version of the document and send your comments
>> to the list before December 14th, especially if you're not in agreement
>> with this change or you think it should be moved to Informational.
>>
>> Thanks,
>> Jeff and Yingzhen (RTGWG co-chairs)
>>
>>
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>
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