Re: Request for MORE reviews of draft-liu-rtgwg-path-aware-remote-protection-02

[tom petch <[e-mail]>]

From: Greg Mirsky <[e-mail]>
Sent: 20 October 2024 22:40

Hi Tom,
thank you for your help in clarifying the scope of the draft. Please find several notes below tagged GIM>> (not on the proposed mechanism but rather on the general aspects of protection and redundancy).

<tp>
Weelll if you look you will see that what I did was copy the Introduction as read and simplify leaving more detail for the Introduction proper, adding a sentence to make the purpose explicit   so I think that your comments are really on the Introduction.

I would not add them to the Abstract as I think that my version is already if anything too long!

I want an Abstract to tell me if I should read further and I hope that my suggestion goes far enough.  Will anyone ignore this I-D because the Abstract does not mention FRR - I was thinking not.

HTH

Tom Petch 

Regards,
Greg

On Sun, Oct 20, 2024 at 2:14 AM tom petch <[e-mail]<mailto:[e-mail]>> wrote:
Abstract is too short - it fails to tell me whether or not I want to read further.

Perhaps

   Current IP network protection mechanisms can be divided into
   local protection and end-to-end protection. Local protection
   technologies, such as ECMP and TI-LFA, can only detect local failures and
  then  perform fast reroute.
GIM>> Althtough the list odesn't have to be exaustive, we may add FRR per RFC 4090.


   End-to-end protection technologies are usually
   targeted at end-to-end TE paths, where the head-end detects TE path
   failures and performs a rapid switchover.
GIM>> Indeed, the described behavior is characteristic to N:M protection. In some scenarios, redundant path may be used in 1+1 protection scheme. Then, it is the tail-end that detects the failure and switches to the backup path.

   There is no mechanism quickly to detect remote failures and invoke
   repairs for non-TE paths.
GIM>> Ain't you excluding multi-hop BFD?


   This document proposes a framework for a path-aware, remote protection
    mechanism for non-TE paths.

with the abbreviations expanded as appropriate (but - of course - no references!).

HTH

Tom Petch

________________________________________
From: linchangwang <[e-mail]<mailto:[e-mail]>>
Sent: 18 October 2024 15:13
To: RTGWG; rtgwg-chairs
Subject: Request for MORE reviews of draft-liu-rtgwg-path-aware-remote-protection-02

Dear All,

Since the last presentation, we have added a detailed description of path information at both the per-neighbor and per-link levels in this draft.
We've also included two co-authors from Juniper and Broadcom.

Current IP network protection mechanisms are mainly divided into local protection and end-to-end protection. There is no mechanism to quickly detect remote failures and initiate repairs for non-TE paths.

The draft is simple and straightforward; it proposes a path-aware remote protection mechanism and outlines its framework.
This includes the control plane, forwarding plane for remote path awareness,
 and a rapid notification framework for remote failures, which can be applied to quick switching in a spine-leaf architecture.

More reviews and comments are welcome!

Thanks,
Changwang


-----邮件原件-----
发件人: [e-mail]<mailto:[e-mail]> <[e-mail]<mailto:[e-mail]>>
发送时间: 2024年9月14日 14:11
收件人: [e-mail]<mailto:[e-mail]>
主题: I-D Action: draft-liu-rtgwg-path-aware-remote-protection-02.txt

Internet-Draft draft-liu-rtgwg-path-aware-remote-protection-02.txt is now available.

   Title:   Path-aware Remote Protection Framework
   Authors: Yisong Liu
            Changwang Lin
            Mengxiao Chen
            Zheng Zhang
            Kevin Wang
            Zongying He
   Name:    draft-liu-rtgwg-path-aware-remote-protection-02.txt
   Pages:   16
   Dates:   2024-09-13

Abstract:

   This document describes the framework of path-aware remote
   protection.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-liu-rtgwg-path-aware-remote-protection/

There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-liu-rtgwg-path-aware-remote-protection-02

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-liu-rtgwg-path-aware-remote-protection-02

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts


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