@techreport{atlas-ip-local-protect-uturn-03, number = {draft-atlas-ip-local-protect-uturn-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-atlas-ip-local-protect-uturn/03/}, author = {Alia Atlas}, title = {{U-turn Alternates for IP/LDP Fast-Reroute}}, pagetotal = 29, year = 2006, month = mar, day = 7, abstract = {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 failure, whether link, node or shared risk link group (SRLG). 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.}, }