[tsvwg] Protocol Action: 'Propagating Explicit Congestion Notification Across IP Tunnel Headers Separated by a Shim' to Proposed Standard (draft-ietf-tsvwg-rfc6040update-shim-23.txt)
The IESG <iesg-secretary@ietf.org> Wed, 06 December 2023 21:39 UTC
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Cc: David Black <david.black@dell.com>, The IESG <iesg@ietf.org>, draft-ietf-tsvwg-rfc6040update-shim@ietf.org, gorry@erg.abdn.ac.uk, martin.h.duke@gmail.com, rfc-editor@rfc-editor.org, tsvwg-chairs@ietf.org, tsvwg@ietf.org
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Date: Wed, 06 Dec 2023 13:39:43 -0800
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Subject: [tsvwg] Protocol Action: 'Propagating Explicit Congestion Notification Across IP Tunnel Headers Separated by a Shim' to Proposed Standard (draft-ietf-tsvwg-rfc6040update-shim-23.txt)
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The IESG has approved the following document: - 'Propagating Explicit Congestion Notification Across IP Tunnel Headers Separated by a Shim' (draft-ietf-tsvwg-rfc6040update-shim-23.txt) as Proposed Standard This document is the product of the Transport and Services Working Group. The IESG contact persons are Zaheduzzaman Sarker and Martin Duke. A URL of this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-rfc6040update-shim/ Technical Summary RFC 6040 on "Tunnelling of Explicit Congestion Notification" made the rules for propagation of ECN consistent for all forms of IP in IP tunnel. This specification updates RFC 6040 to clarify that its scope includes tunnels where two IP headers are separated by at least one shim header that is not sufficient on its own for wide area packet forwarding. It surveys widely deployed IP tunnelling protocols that use such shim header(s) and updates the specifications of those that do not mention ECN propagation (that is RFC 2661, RFC 3931, RFC 2784, RFC 4380 and RFC 7450, which respectively specify L2TPv2, L2TPv3, GRE, Teredo and AMT). This specification also updates RFC 6040 with configuration requirements needed to make any legacy tunnel ingress safe. Working Group Summary The WG reached consensus following a WGLC that concluded on 25th April 2021, and rev 14 was thought to resolve the WG comments. This document has a dependency on ietf-tsvwg-ecn-encap-guidelines, and that document has stalled publication of this draft. Since rev-14, the author has continued to correct text and respond to Shepherd comments. Document Quality There are a wide variety of tunnel specifications and implementations, some of these are thought to follow the design described in this document. Personnel The Document Shepherd for this document is Gorry Fairhurst. The Responsible Area Director is Martin Duke.