I-D ACTION:draft-ietf-tsvwg-tcp-ecn-00.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Transport Area Working Group Working Group of the IETF.

	Title		: TCP with ECN: The Treatment of Retransmitted Data 
                          Packets
	Author(s)	: S. Floyd, K. Ramakrishnan
	Filename	: draft-ietf-tsvwg-tcp-ecn-00.txt
	Pages		: 9
	Date		: 06-Nov-00
	
This document makes recommendations for the use of ECN with
retransmitted data packets, for an ECN-capable TCP connection.  This
document supplements RFC 2481 [RFC2481], which did not address the
issue of retransmitted data packets.  This document recommends that
for ECN-capable TCP implementations, the ECT bit (ECN-Capable
Transport) in the IP header SHOULD NOT be set on retransmitted data
packets, and that the TCP data receiver SHOULD ignore the ECN field
on arriving data packets that are outside of the receiver's current
window.  This is for greater security against denial-of-service
attacks.

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