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RFC 3168, "The Addition of Explicit Congestion Notification (ECN) to IP", September 2001

Note: This RFC has been updated by RFC 4301, RFC 6040, RFC 8311

Source of RFC: tsvwg (wit)

Errata ID: 3636
Status: Rejected
Type: Editorial
Publication Format(s) : TEXT
Reported By: Mirja Kühlewind
Date Reported: 2013-06-04
Rejected by: Martin Stiemerling
Date Rejected: 2013-07-11

Section 6.1.1. says: 

If the TCP connection does not
   wish to use ECN notification for a particular packet, the sending TCP
   sets the ECN codepoint to not-ECT, and the TCP receiver ignores the
   CE codepoint in the received packet.

It should say:

If the TCP connection does not
   wish to use ECN notification for a particular packet, the sending TCP
   sets the ECN codepoint to not-ECT.

Notes:

CE should not be set on not-ECT capable packets. If this happens anyway, the CE codepoint would overwrite the ECT codepoint. Thus there is no way for the receiver to know it should ignore the CE codepoint; the sentence is therefore nonsensical.
--VERIFIER NOTES--
See discussions in the tsvwg (http://www.ietf.org/mail-archive/web/tsvwg/current/msg11989.html)

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