A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : U-turn Alternates for IP/LDP Local Protection
Author(s) : A. Atlas
Filename : draft-atlas-ip-local-protect-uturn-01.txt
Pages : 27
Date : 2004-10-26
This document defines and describes the use of u-turn alternates to
provide local protection for IP unicast and/or LDP traffic in the
event of a single link or node failure. When a topology change
occurs, a router S pre-computes for each prefix an alternate next-hop
that can be used if the primary next-hop fails. An acceptable
alternate can be either a loop-free alternate or a U-turn alternate.
A U-turn alternate uses a neighbor, whose primary next-hop to the
prefix is router S itself and which has itself a loop-free
node-protecting alternate, which thus does not go through router S to
reach the destination prefix.
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