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This draft is a work item of the IS-IS for IP Internets Working Group of the IETF.
Title : Restart signaling for IS-IS
Author(s) : M. Shand
Filename : draft-ietf-isis-restart-02.txt
Pages : 10
Date : 2002-11-5
The IS-IS routing protocol (RFC 1142 [2], ISO/IEC 10589 [3]) is a
link state intra-domain routing protocol. Normally, when an IS-IS
router is re-started, the neighboring routers detect the restart
event and cycle their adjacencies with the restarting router through
the down state. This is necessary in order to invoke the protocol
mechanisms to ensure correct re-synchronization of the LSP database.
However, the cycling of the adjacency state causes the neighbors to
regenerate their LSPs describing the adjacency concerned. This in
turn causes temporary disruption of routes passing through the
restarting router.
In certain scenarios such temporary disruption of the routes is
highly undesirable.
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