A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the TCP Maintenance and Minor Extensions Working Group of the IETF.
Title : More Accurate ECN Feedback in TCP
Authors : Bob Briscoe
Mirja Kühlewind
Richard Scheffenegger
Filename : draft-ietf-tcpm-accurate-ecn-00.txt
Pages : 37
Date : 2015-12-14
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.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-tcpm-accurate-ecn/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-tcpm-accurate-ecn-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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