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This draft is a work item of the Common Control and Measurement Plane Working Group of the IETF.
Title : Extensions to GMPLS RSVP Graceful Restart
Author(s) : A. Satyanarayana, R. Rahman
Filename : draft-ietf-ccamp-rsvp-restart-ext-06.txt
Pages : 24
Date : 2006-12-8
This document describes extensions to the RSVP Graceful Restart
mechanisms defined in RFC 3473. The extensions enable the recovery
of RSVP signaling state based on the Path message last sent by the
node being restarted. Previously defined Graceful Restart
mechanisms, also called recovery from nodal faults, permit recovery
of signaling state from adjacent nodes when the data plane has
retained the associated forwarding state across a restart. These
mechanisms do not fully support signaling state recovery on ingress
nodes or recovery of all RSVP objects. The presented extensions use
the RSVP Hello extensions defined in RFC 3209, and extensions for
state recovery on nodal faults defined in RFC 3473. With the
presented extensions the restarting node can recover all previously
transmitted Path state including the Explicit Route Object and the
downstream (outgoing) interface identifiers. The extensions can also
be used to recover signaling state after the restart of an ingress
node. The extensions optionally support the use of Summary Refresh,
defined in RFC 2961, to reduce the number of messages exchanged
during the Recovery Phase when the restarting node has recovered
signaling state locally for one or more LSPs.
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