Last Call: <draft-ietf-tcpm-accecn-reqs-07.txt> (Problem Statement and Requirements for a More Accurate ECN Feedback) to Informational RFC

The IESG <> Thu, 20 November 2014 17:34 UTC

Return-Path: <>
Received: from localhost ( []) by (Postfix) with ESMTP id 762A81A1BE1; Thu, 20 Nov 2014 09:34:14 -0800 (PST)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -101.9
X-Spam-Status: No, score=-101.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, USER_IN_WHITELIST=-100] autolearn=ham
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id SmgraW1SPpM4; Thu, 20 Nov 2014 09:34:13 -0800 (PST)
Received: from (localhost [IPv6:::1]) by (Postfix) with ESMTP id EF7E81A1B48; Thu, 20 Nov 2014 09:34:12 -0800 (PST)
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
From: The IESG <>
To: IETF-Announce <>
Subject: Last Call: <draft-ietf-tcpm-accecn-reqs-07.txt> (Problem Statement and Requirements for a More Accurate ECN Feedback) to Informational RFC
X-Test-IDTracker: no
X-IETF-IDTracker: 5.7.4
Auto-Submitted: auto-generated
Precedence: bulk
Sender: <>
Message-ID: <>
Date: Thu, 20 Nov 2014 09:34:12 -0800
X-Mailman-Version: 2.1.15
List-Id: "IETF announcement list. No discussions." <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Thu, 20 Nov 2014 17:34:14 -0000

The IESG has received a request from the TCP Maintenance and Minor
Extensions WG (tcpm) to consider the following document:
- 'Problem Statement and Requirements for a More Accurate ECN Feedback'
  <draft-ietf-tcpm-accecn-reqs-07.txt> as Informational RFC

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the mailing lists by 2014-12-04. Exceptionally, comments may be
sent to instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.


   Explicit Congestion Notification (ECN) is a mechanism where network
   nodes can mark IP packets instead of dropping them to indicate
   congestion to the end-points.  An ECN-capable receiver will feed this
   information back to the sender.  ECN is specified for TCP in such a
   way that it can only feed back one congestion signal per Round-Trip
   Time (RTT).  In contrast, ECN for other transport protocols, such as
   RTP/UDP and SCTP, is specified with more accurate ECN feedback.
   Recent new TCP mechanisms (like ConEx or DCTCP) need more accurate
   ECN feedback in the case where more than one marking is received in
   one RTT.  This document specifies requirements for an update to the
   TCP protocol to provide more accurate ECN feedback.

The file can be obtained via

IESG discussion can be tracked via

No IPR declarations have been submitted directly on this I-D.