The IESG has approved the following document: - 'Relaxing Restrictions on Explicit Congestion Notification (ECN) Experimentation' (draft-ietf-tsvwg-ecn-experimentation-08.txt) as Proposed Standard This document is the product of the Transport Area Working Group. The IESG contact persons are Mirja Kühlewind and Spencer Dawkins. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-ecn-experimentation/ Technical Summary This memo updates RFC 3168, which specifies Explicit Congestion Notification (ECN) as a replacement for packet drops as indicators of network congestion. It relaxes restrictions in RFC 3168 that would otherwise hinder experimentation towards benefits beyond just removal of loss. The memo summarizes the anticipated areas of experimentation and updates RFC 3168 to enable experimentation in these areas. An Experimental RFC is required to take advantage of any of these enabling updates. In addition, this memo makes related updates to the ECN specifications for RTP in RFC 6679 and for DCCP in RFC 4341, RFC 4342 and RFC 5622. The memo also records the conclusion of the ECN Nonce experiment in RFC 3540, and provides the rationale for reclassification of RFC 3540 as Historic; this reclassification enables new experimental use of the ECT(1) codepoint. Working Group Summary The document was adopted by the working group to enable two specific pieces of work - ABE (now in TCPM) and L4S (now a working group item in TSVWG). Both these items of work currently have experimental status, yet seek to modify the ECN specification produced by TSVWG - specifically to obsolete the ECN NONCE. This topic has been discussed in TSVWG over many years and it is finally the consensus that the experiment has concluded and that the ECN NONCE specification is no longer recommended for deployment. Note that this specification is the supporting RFC for a change of RFC 3540 (EXP) status to Historic. The actual status change document is status-change-ecn-signaling-with-nonces-to-historic. Document Quality The document has received significant review by several people in TSVWG - both as an individual submission and as as WG draft, including detailed feedback from M Welzl and B Briscoe. Minor updates were made in response to last call comments and this document is therefore ready to proceed. Personnel The Document Shepherd is Gorry Fairhurst. The responsible Area Director is Spencer Dawkins.
