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More Accurate ECN Feedback in TCP
draft-ietf-tcpm-accurate-ecn-02

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Active".
Expired & archived
Authors Bob Briscoe , Mirja Kühlewind , Richard Scheffenegger
Last updated 2017-05-04 (Latest revision 2016-10-31)
Replaces draft-kuehlewind-tcpm-accurate-ecn
RFC stream Internet Engineering Task Force (IETF)
Formats
Reviews
Additional resources Mailing list discussion
Stream WG state WG Document
Associated WG milestone
Dec 2022
Submit specification of more accurate ECN feedback in TCP to the IESG for publication as a Proposed Standard RFC
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD Spencer Dawkins
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

Explicit Congestion Notification (ECN) is a mechanism where network nodes can mark IP packets instead of dropping them to indicate incipient congestion to the end-points. Receivers with an ECN- capable transport protocol feed back this information to the sender. ECN is specified for TCP in such a way that only one feedback signal can be transmitted per Round-Trip Time (RTT). Recently, new TCP mechanisms like Congestion Exposure (ConEx) or Data Center TCP (DCTCP) need more accurate ECN feedback information whenever more than one marking is received in one RTT. This document specifies an experimental scheme to provide more than one feedback signal per RTT in the TCP header. Given TCP header space is scarce, it overloads the three existing ECN-related flags in the TCP header and provides additional information in a new TCP option.

Authors

Bob Briscoe
Mirja Kühlewind
Richard Scheffenegger

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)