[spring] New Version Notification for draft-ruan-spring-priority-flow-control-sid

"阮征(联通集团本部)" <ruanz6@chinaunicom.cn> Sat, 28 February 2026 08:52 UTC

Date: Sat, 28 Feb 2026 16:52:40 +0800
Mime-Version: 1.0
Message-ID: <2026022816523990796226@chinaunicom.cn>
Content-Type: multipart/alternative; boundary="----=_001_NextPart733425448128_=----"
From: "阮征(联通集团本部)" <ruanz6@chinaunicom.cn>
To: spring <spring@ietf.org>, rtgwg <rtgwg@ietf.org>
Feedback-ID: qylesmxpt:chinaunicom.cn:default:xx-kxq-mail.novalocal
Message-ID-Hash: BDLFWQ6IA6E25KPOFTZRCTBAXBPWVG4L
Precedence: list
Subject: [spring] New Version Notification for draft-ruan-spring-priority-flow-control-sid
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/bNCr3nuNOorcA4uIluKh4L1sTb0>

Dear all,

This is to inform you that a new version of the draft draft-ruan-spring-priority-flow-control-sid has been uploaded to the IETF datatracker, with the link as follows:
https://datatracker.ietf.org/doc/draft-ruan-spring-priority-flow-control-sid/

 This draft leverages SRv6 policy’s explicit path orchestration  capabilities to extend PFC-based flow control to cross-DC WANs, enabling tenant-isolated, scalable flow control for RDMA/RoCEv2 traffic.

The core content includes

      1. Defining a new SRv6 Endpoint behavior End.X.PFC, an enhanced variant of the standard End.X behavior, used to identify PFC-capable interfaces in WAN and support the precise path-based delivery of PFC backpressure frames;

      2. Proposing two deployment modes for PFC backpressure signal transmission based on SRv6: controller-pre-deployed SRv6 tunnels and device-auto-triggered dynamic tunnel creation, to adapt to different WAN network deployment scenarios;

Key Revisions in This Version:

     In response to the discussions on the previous mail list, we have optimized and revised the draft content, mainly including eliminating ambiguous descriptions about the End.X.PFC behavior, and supplementing the detailed deployment specifications of SRv6 tunnels for PFC signal transmission, to make the technical solution more clear and operable.

Request for Attention and Discussion

     Given that the flow control mechanism defined in this draft is not only related to the SPRING working group's SRv6 technology system, but also has potential relevance to the research scopes of RTGWG, we sincerely invite all colleagues from the two working groups to pay attention to this draft, conduct in-depth discussions on the technical solution, and put forward valuable questions and revision suggestions.

We look forward to your feedback and will actively respond to and discuss all comments to further improve the draft.

Best regards,

RuanZheng




ruanz6@chinaunicom.cn

[spring] New Version Notification for draft-ruan-… 阮征(联通集团本部)