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Title : Layered Encapsulation of Congestion Notification
Author(s) : B. Briscoe
Filename : draft-briscoe-tsvwg-ecn-tunnel-00.txt
Pages : 21
Date : 2007-7-3
This document redefines how the explicit congestion notification
(ECN) field of the outer IP header of a tunnel should be constructed.
It brings all IP in IP tunnels (v4 or v6) into line with the way
IPsec tunnels now construct the ECN field, ensuring that the outer
header reveals any congestion experienced so far on the path. It
specifies the default ECN tunneling behaviour for any Diffserv per-
hop behaviour (PHB), but also gives general principles to guide the
design of alternate congestion marking behaviours for specific PHBs
and for lower layer congestion notification schemes.
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