[Tsvwg] I-D ACTION:draft-ietf-tsvwg-ecn-tunnels-00.txt

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This draft is a work item of the Transport Area Working Group Working Group of the IETF.

	Title		: ECN Interactions with IP Tunnels
	Author(s)	: S. Floyd, K. Ramakrishnan, D. Black
	Filename	: draft-ietf-tsvwg-ecn-tunnels-00.txt
	Pages		: 13
	Date		: 07-Nov-00
	
The encapsulation of IP packet headers in tunnels is used in many
places, including IPsec and IP in IP [RFC2003].  Explicit Congestion
Notification (ECN) is an experimental addition to the IP architecture
that uses the ECN field in the IP header to provide an indication of
the onset of congestion to applications.  ECN provides this
congestion indication to enable end-node adaptation to network
conditions without the use of dropped packets [RFC 2481].  Currently,
the ECN specification does not accommodate the constraints imposed by
some of these pre-existing specifications for tunnels.  This document
considers issues related to interactions between ECN and IP tunnels,
and proposes two alternative solutions

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