Hi Xueyan, thank you for sharing the updated draft. A relatively new draft draft-halmir-mpls-ecn <https://datatracker.ietf.org/doc/draft-halmir-mpls-ecn/> on supporting ECN in the MPLS using MNA might be of interest to you and others involved in the matter. And I have a question. As I understand the ECN, it is a host that is expected to act on the information collected in the ECN field along the path of a packet. If that is correct, who's the intended target of the IPFIX notification about the ECN? Is the intention to act on ECN information obtained on a segment, e.g., a tunnel, rather than based on the e2e ECN information? I read Section 5, but was left with these questions.
Regards, Greg On Fri, Jan 9, 2026 at 1:53 AM <[email protected]> wrote: > Hello OPSAWG and TSVWG, > > > We submited a new draft and posted it in the IETF datatracker > <https://datatracker.ietf.org/doc/draft-song-opsawg-ipfix-ecn/> > https://datatracker.ietf.org/doc/draft-song-opsawg-ipfix-ecn/ > > The following IPFIX information elements are introduced for L4S ECN > monitoring: > > - ECN field capture in protocol layer, including ECN field in IPv4/IPv6 > ECN field, MPLS EXP and tunnel ECN negotiation status > > - ECN codepoint statistics, including incremenatl and total count for > non-ECT, ECT(0), ECT(1) and CE packets > > - L4S performance indicator, providing short-term and long-term view of > congestion experienced by L4S traffic > > > Your review, comments and questions are welcome. > > > Best regards, > > Xueyan > > > Original > *From: *[email protected] <[email protected]> > *To: *宋雪雁00038118;刘尧00165286; > *Date: *2025年12月26日 16:33 > *Subject: **New Version Notification for > draft-song-opsawg-ipfix-ecn-00.txt* > A new version of Internet-Draft draft-song-opsawg-ipfix-ecn-00.txt has been > successfully submitted by Xueyan Song and posted to the > IETF repository. > > Name: draft-song-opsawg-ipfix-ecn > Revision: 00 > Title: Export of L4S ECN in IP Flow Information Export (IPFIX) > Date: 2025-12-26 > Group: Individual Submission > Pages: 14 > URL: > https://www.ietf.org/archive/id/draft-song-opsawg-ipfix-ecn-00.txt > Status: https://datatracker.ietf.org/doc/draft-song-opsawg-ipfix-ecn/ > HTML: > https://www.ietf.org/archive/id/draft-song-opsawg-ipfix-ecn-00.html > HTMLized: > https://datatracker.ietf.org/doc/html/draft-song-opsawg-ipfix-ecn > > > Abstract: > > This document defines a set of IP Flow Information Export (IPFIX) > Information Elements for monitoring the Low Latency, Low Loss, and > Scalable throughput (L4S) service. Specially, these elements enable > network operators to monitor the Explicit Congestion Notification > (ECN) information of L4S deployment and performance of traffic. > > > > The IETF Secretariat > > > _______________________________________________ > OPSAWG mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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