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I-D ACTION:draft-iwata-mpls-crankback-04.txt



A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: Crankback Routing Extensions for MPLS Signaling
	Author(s)	: A. Iwata, N. Fujita, G. Ash, 
                          A. Farrel, S. Marshall-Unitt
	Filename	: draft-iwata-mpls-crankback-04.txt
	Pages		: 32
	Date		: 28-Jun-02
	
This draft proposes crankback routing extensions for CR-
LDP signaling and for RSVP-TE signaling.
Recently, several routing protocol extensions for
advertising resource information in addition to topology
information have been proposed for use in distributed
constraint-based routing.  In such a distributed routing
environment, however, the information used to compute a
constraint-based path may be out of date.  This means
that LSP setup requests may be blocked by links or nodes
without sufficient resources.
This draft specifies crankback routing extensions for CR-
LDP and RSVP-TE so that the label request can be retried
on an alternate path that detours around the blocked link
or node upon a setup failure.

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