I-D ACTION:draft-ietf-dna-cpl-01.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 Detecting Network Attachment Working Group of the IETF.

	Title		: DNA with unmodified routers: Prefix list based approach
	Author(s)	: E. Nordmark, J. Choi
	Filename	: draft-ietf-dna-cpl-01.txt
	Pages		: 32
	Date		: 2005-7-15
	
Upon establishing a new link-layer connection, a host determines
   whether a link change has occurred, that is, whether or not it has
   moved at layer 3 and therefor needs new IP configuration.  This draft
   presents a way to robustly check for link change without assuming any
   changes to the routers.  We choose to uniquely identify each link by
   the set of prefixes assigned to it.  We propose that, at each
   attached link, the host generates the complete prefix list, that is,
   a prefix list containing all the valid prefixes on the link, and when
   it receives a hint that indicates a possible link change, it detects
   the identity of the currently attached link by consulting the
   existing prefix list.  This memo describes how to generate the
   complete prefix list and to robustly detect the link identity even in
   the presence of packet loss.

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