Hi Rakesh, I'm not sure. The intermediate nodes are not supposed to check the SRH, right? If so, a flag in SRH doesn't help.
On the other hand, RFC 8986 said "It is RECOMMENDED that an implementation of local configuration only allows Upper-Layer header processing of types that do not result in the packet being forwarded (e.g., ICMPv6)." I don't know how to interpret this sentence. If the upper header is UDP, the packet will be forwarded, right? Does that mean that it is not recommended to configure the processing of UDP as the upper layer protocol. Then a flag bit might be useful. Haoyu From: Rakesh Gandhi <rgandhi.i...@gmail.com> Sent: Wednesday, October 16, 2024 1:22 PM To: spring <spring@ietf.org>; Haoyu Song <haoyu.s...@futurewei.com> Subject: Re: [spring] I-D Action: draft-ietf-spring-stamp-srpm-03.txt Hi Haoyu, Catching-up on the old email thread. Is this new SRH flag needed for intermediate nodes to process UDP header? For the end-point nodes, there is upper layer header procedure defined in RFC 8986 that is used by the draft. https://www.rfc-editor.org/rfc/rfc8986.html#name-upper-layer-header Thanks, Rakesh -----Original Message----- Re: [spring] I-D Action: draft-ietf-spring-stamp-srpm-03.txt From: Haoyu Song <haoyu.s...@futurewei.com<mailto:haoyu.s...@futurewei.com>> Wed, 02 February 2022 19:33 UTC Hi Rakesh and the other authors, Since this draft also propose to use UDP for active measurement in SRv6, I'd like to suggest that a flag bit in SRH is used to indicate that. The reasons are twofold: (1) routers may only look at L3 header for forwarding without examining the L4 header. So if a test packet can only be identified by UDP port, it may be missed; (2) it's possible to use the same mechanism to support other kinds of active measurements (e.g., HBH IOAM as proposed in our draft https://datatracker.ietf.org/doc/html/draft-song-spring-siam-02. Best, Haoyu -----Original Message----- From: spring <spring-boun...@ietf.org><mailto:<spring-boun...@ietf.org>> On Behalf Of internet-dra...@ietf.org<mailto:internet-dra...@ietf.org> Sent: Tuesday, February 1, 2022 4:19 PM To: i-d-annou...@ietf.org<mailto:i-d-annou...@ietf.org> Cc: spring@ietf.org<mailto:spring@ietf.org> Subject: [spring] I-D Action: draft-ietf-spring-stamp-srpm-03.txt A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Source Packet Routing in Networking WG of the IETF. Title : Performance Measurement Using Simple TWAMP (STAMP) for Segment Routing Networks Authors : Rakesh Gandhi Clarence Filsfils Daniel Voyer Mach(Guoyi) Chen Bart Janssens Richard Foote Filename : draft-ietf-spring-stamp-srpm-03.txt Pages : 24 Date : 2022-02-01 Abstract: Segment Routing (SR) leverages the source routing paradigm. SR is applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6 (SRv6) data planes. This document describes procedures for Performance Measurement in SR networks using the mechanisms defined in RFC 8762 (Simple Two-Way Active Measurement Protocol (STAMP)) and its optional extensions defined in RFC 8972 and further augmented in draft-ietf-ippm-stamp-srpm. The procedure described is applicable to SR-MPLS and SRv6 data planes and is used for both links and end-to- end SR paths including SR Policies. The IETF datatracker status page for this draft is: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-stamp-srpm%2F&data=04%7C01%7Chaoyu.song%40futurewei.com%7C9e9ebc01c8c942755a2d08d9e5e1c397%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637793580085471585%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=uRFB7p9GlMVjo%2Ft9FOVR7Gg49Ah1Y79CbhzLWHPDFH0%3D&reserved=0<https://datatracker.ietf.org/doc/draft-ietf-spring-stamp-srpm/> There is also an HTML version available at: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-ietf-spring-stamp-srpm-03.html&data=04%7C01%7Chaoyu.song%40futurewei.com%7C9e9ebc01c8c942755a2d08d9e5e1c397%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637793580085471585%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=0m4WNO9jMptJw14nENpOaftEzNdQDqHUbRr5YJMaX8w%3D&reserved=0<https://www.ietf.org/archive/id/draft-ietf-spring-stamp-srpm-03.html> A diff from the previous version is available at: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Frfcdiff%3Furl2%3Ddraft-ietf-spring-stamp-srpm-03&data=04%7C01%7Chaoyu.song%40futurewei.com%7C9e9ebc01c8c942755a2d08d9e5e1c397%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637793580085471585%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=4qPBxUc7x44ZFWzb3kM7tIVrYODE8iMw8xQD1eMC4zw%3D&reserved=0<https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-stamp-srpm-03> Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts _______________________________________________ spring mailing list spring@ietf.org<mailto:spring@ietf.org> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fspring&data=04%7C01%7Chaoyu.song%40futurewei.com%7C9e9ebc01c8c942755a2d08d9e5e1c397%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637793580085471585%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=laC%2B5pQbD7tnmE34VUJRR0s19LoPnEipFQbPe0PwfqE%3D&reserved=0<https://www.ietf.org/mailman/listinfo/spring>
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