Relaxing Restrictions on Explicit Congestion Notification (ECN) Experimentation
RFC 8311
Document | Type | RFC - Proposed Standard (January 2018; Errata) | |
---|---|---|---|
Author | David Black | ||
Last updated | 2020-01-21 | ||
Replaces | draft-black-tsvwg-ecn-experimentation | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Gorry Fairhurst | ||
Shepherd write-up | Show (last changed 2017-07-04) | ||
IESG | IESG state | RFC 8311 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Spencer Dawkins | ||
Send notices to | "Gorry Fairhurst" <gorry@erg.abdn.ac.uk> | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) D. Black Request for Comments: 8311 Dell EMC Updates: 3168, 4341, 4342, 5622, 6679 January 2018 Category: Standards Track ISSN: 2070-1721 Relaxing Restrictions on Explicit Congestion Notification (ECN) Experimentation Abstract This memo updates RFC 3168, which specifies Explicit Congestion Notification (ECN) as an alternative to packet drops for indicating network congestion to endpoints. It relaxes restrictions in RFC 3168 that hinder experimentation towards benefits beyond just removal of loss. This memo summarizes the anticipated areas of experimentation and updates RFC 3168 to enable experimentation in these areas. An Experimental RFC in the IETF document stream 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 the Datagram Congestion Control Protocol (DCCP) in RFCs 4341, 4342, and 5622. This memo also records the conclusion of the ECN nonce experiment in RFC 3540 and provides the rationale for reclassification of RFC 3540 from Experimental to Historic; this reclassification enables new experimental use of the ECT(1) codepoint. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8311. Black Standards Track [Page 1] RFC 8311 ECN Experimentation January 2018 Copyright Notice Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Black Standards Track [Page 2] RFC 8311 ECN Experimentation January 2018 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. ECN Terminology . . . . . . . . . . . . . . . . . . . . . 4 1.2. Requirements Language . . . . . . . . . . . . . . . . . . 4 2. ECN Experimentation: Overview . . . . . . . . . . . . . . . . 5 2.1. Effective Congestion Control is Required . . . . . . . . 6 2.2. Network Considerations for ECN Experimentation . . . . . 6 2.3. Operational and Management Considerations . . . . . . . . 7 3. ECN Nonce and RFC 3540 . . . . . . . . . . . . . . . . . . . 8 4. Updates to RFC 3168 . . . . . . . . . . . . . . . . . . . . . 9 4.1. Congestion Response Differences . . . . . . . . . . . . . 9 4.2. Congestion Marking Differences . . . . . . . . . . . . . 10 4.3. TCP Control Packets and Retransmissions . . . . . . . . . 13 5. ECN for RTP Updates to RFC 6679 . . . . . . . . . . . . . . . 14 6. ECN for DCCP Updates to RFCs 4341, 4342, and 5622 . . . . . . 16 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16 8. Security Considerations . . . . . . . . . . . . . . . . . . . 16 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 17 9.1. Normative References . . . . . . . . . . . . . . . . . . 17Show full document text