Name: draft-atlas-ip-local-protect-uturn-01
Title: U-turn Alternates for IP/LDP Local Protection
State: Active
Authors: Alia Atlas
Group: Individual Submissions (none)
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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