Dear all, Our draft "SRv6 behavior extention for Flow Control in WAN" is scheduled to be presented at the upcoming SPRING WG session.The latest version of the draft-ruan-spring-priority-flow-control-sid can be found with below link： URL: https://datatracker.ietf.org/doc/draft-ruan-spring-priority-flow-control-sid/,
Abstract: As RoCEv2 and loss-sensitive applications become increasingly prevalent across data centers, there is a growing demand to make cross-data-center interactions as efficient and controllable as those within a single data center. Flow control mechanisms within DCs, such as PFC, need to be extended to the WAN. However, PFC is not suitable for direct application to the WAN due to its inherent limitations. To address this, our draft proposes a more economical and flexible solution. By defining a new SRv6 behavior (End.X.PFC), we enable cross-hop RoCE backpressure to specific interfaces with flow control capability, bypassing intermediate legacy WAN devices via SRv6 reverse tunnels, without requiring any upgrades to transit nodes. This approach ultimately achieves end-to-end lossless transmission across both DCNs and the WAN. Welcome any comments, suggestions, or feedbacks. B.R, Zhengxin 韩政鑫 中国联合网络通信有限公司研究院 下一代互联网研究部 邮箱：[email protected] 电话：18601275531 通信地址：北京市海淀区首体南路9号主语国际3号楼
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