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Title : Crankback Routing Extensions for MPLS Signaling
Author(s) : A. Farrel, A. Iwata
Filename : draft-iwata-mpls-crankback-05.txt
Pages : 29
Date : 2003-3-7
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constraint-based path may be out of date.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 use
in Multi-Protocol Label Switching (MPLS) signaling using
RSVP-TE as defined in 'RSVP-TE: Extensions to RSVP for
LSP Tunnels', RFC3209, so that the LSP setup request can
be retried on an alternate path that detours around the
blocked link or node upon a setup failure.
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