I-D ACTION:draft-briscoe-tsvwg-re-ecn-tcp-03.txt

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	Title		: Re-ECN: Adding Accountability for Causing 
                          Congestion to TCP/IP
	Author(s)	: B. Briscoe, et al.
	Filename	: draft-briscoe-tsvwg-re-ecn-tcp-03.txt
	Pages		: 85
	Date		: 2006-10-26
	
This document introduces a new protocol for explicit congestion
   notification (ECN), termed re-ECN, which can be deployed
   incrementally around unmodified routers.  The protocol arranges an
   extended ECN field in each packet so that, as it crosses any
   interface in an internetwork, it will carry a truthful prediction of
   congestion on the remainder of its path.  Then the upstream party at
   any trust boundary in the internetwork can be held responsible for
   the congestion they cause, or allow to be caused.  So, networks can
   introduce straightforward accountability and policing mechanisms for
   incoming traffic from end-customers or from neighbouring network
   domains.  The purpose of this document is to specify the re-ECN
   protocol at the IP layer and to give guidelines on any consequent
   changes required to transport protocols.  It includes the changes
   required to TCP both as an example and as a specification.  It also
   gives examples of mechanisms that can use the protocol to ensure data
   sources respond correctly to congestion.  And it describes example
   mechanisms that ensure the dominant selfish strategy of both network
   domains and end-points will be to set the extended ECN field
   honestly.

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