Hi all,

thanks, Yanmei!

Actually, I think there is one more small change that we should mention because 
it changes the normative requirements slightly:


  *   It is now recommended (SHOULD) to always send the PATH_ABANDON frame on 
another path than the to-be-abandoned path.

Also note that we now have 0 open issues that we need to address! Yeah! So, 
this is a good time for updating your implementation and we look forward to 
some more interop testing in the coming weeks!

Mirja



From: Yanmei Liu <[email protected]>
Reply to: Yanmei Liu <[email protected]>
Date: Wednesday, 22. January 2025 at 14:17
To: quic <[email protected]>, WG Chairs <[email protected]>
Cc: Christian Huitema <[email protected]>, Mirja Kuehlewind 
<[email protected]>, "yunfei.ma" <[email protected]>, 
"quentin.deconinck" <[email protected]>, "olivier.bonaventure" 
<[email protected]>
Subject: Fw: New Version Notification for draft-ietf-quic-multipath-12.txt

Hi Everyone,

We submitted a new draft version -12 for multipath extension: 
https://datatracker.ietf.org/doc/draft-ietf-quic-multipath/

The new version contains several modifications:
1. Add PATH_CIDS_BLOCKED frame as an explicit signal for situations when 
endpoints don’t have unused CIDs for the corresponding path
2. When endpoint sends PATH_ABANDON frame but don’t receive a corresponding 
PATH_ABANDON, it’s left to the implementation when to release the path 
resources, but endpoints SHOULD wait at least 3 PTOs before remove the issued 
CIDs of the path.
3. Packets which only contains PATH_ACK frames are not congestion controlled, 
but senders should carefully consider the load induced by these packets.
4. Add guidance for handling PTO on multiple paths.
5. It’s recommended to open a new path for active client migration.
6. Update transport parameter for the new version.

The diff link between -11 and -12:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-quic-multipath-12<https://author-tools.ietf.org/iddiff?url2=draft-ietf-quic-multipath-11>

Please have a look and feel free to share ideas!

Best Regards,
Yanmei


------------------------------------------------------------------
From:internet-drafts <[email protected]>
Send Time:2025 Jan. 22 (Wed.) 17:58
To:LIU Yanmei<[email protected]>; "马云飞"<[email protected]>; Christian 
Huitema<[email protected]>; Mirja Kuehlewind<[email protected]>; 
Olivier Bonaventure<[email protected]>; Quentin De 
Coninck<[email protected]>; "quic-chairs"<[email protected]>
Subject:New Version Notification for draft-ietf-quic-multipath-12.txt

A new version of Internet-Draft draft-ietf-quic-multipath-12.txt has been
successfully submitted by Yanmei Liu and posted to the
IETF repository.

Name:     draft-ietf-quic-multipath
Revision: 12
Title:    Multipath Extension for QUIC
Date:     2025-01-22
Group:    quic
Pages:    39
URL:      https://www.ietf.org/archive/id/draft-ietf-quic-multipath-12.txt
Status:   https://datatracker.ietf.org/doc/draft-ietf-quic-multipath/
HTML:     https://www.ietf.org/archive/id/draft-ietf-quic-multipath-12.html
HTMLized: https://datatracker.ietf.org/doc/html/draft-ietf-quic-multipath
Diff:     https://author-tools.ietf.org/iddiff?url2=draft-ietf-quic-multipath-12

Abstract:

  This document specifies a multipath extension for the QUIC protocol
  to enable the simultaneous usage of multiple paths for a single
  connection.

Discussion Venues

  This note is to be removed before publishing as an RFC.

  Discussion of this document takes place on the QUIC Working Group
  mailing list ([email protected]), which is archived at
  https://mailarchive.ietf.org/arch/browse/quic/.

  Source for this draft and an issue tracker can be found at
  https://github.com/quicwg/multipath.



The IETF Secretariat

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