Relaxing Restrictions on Explicit Congestion Notification (ECN) Experimentation
draft-ietf-tsvwg-ecn-experimentation-08

Document Type Active Internet-Draft (tsvwg WG)
Last updated 2017-11-30 (latest revision 2017-11-13)
Replaces draft-black-tsvwg-ecn-experimentation
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Stream WG state Submitted to IESG for Publication (wg milestone: Jun 2017 - Submit ‘Explicit Con... )
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Transport Area Working Group                                    D. Black
Internet-Draft                                                  Dell EMC
Updates: 3168, 4341, 4342, 5622, 6679                  November 13, 2017
         (if approved)
Intended status: Standards Track
Expires: May 17, 2018

    Relaxing Restrictions on Explicit Congestion Notification (ECN)
                            Experimentation
                draft-ietf-tsvwg-ecn-experimentation-08

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 DCCP in RFC 4341, RFC 4342 and RFC 5622.  This 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.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 17, 2018.

Black                     Expires May 17, 2018                  [Page 1]
Internet-Draft             ECN Experimentation             November 2017

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   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  ECN Terminology . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  ECN Experimentation: Overview . . . . . . . . . . . . . . . .   4
     2.1.  Effective Congestion Control is Required  . . . . . . . .   5
     2.2.  Network Considerations for ECN Experimentation  . . . . .   5
     2.3.  Operational and Management Considerations . . . . . . . .   6
   3.  ECN Nonce and RFC 3540  . . . . . . . . . . . . . . . . . . .   7
   4.  Updates to RFC 3168 . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Congestion Response Differences . . . . . . . . . . . . .   8
     4.2.  Congestion Marking Differences  . . . . . . . . . . . . .   9
     4.3.  TCP Control Packets and Retransmissions . . . . . . . . .  12
   5.  ECN for RTP Updates to RFC 6679 . . . . . . . . . . . . . . .  13
   6.  ECN for DCCP Updates to RFCs 4341, 4342 and 5622  . . . . . .  15
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
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