I'm having to build RSVP-signalled LSPs to non-adjacent nodes in order to improve LFA coverage for OSPF and LDP, and am using the 'backup' knob in the label-switched-path definition to ensure OSPF can use it. Still in the design/test phase here, but an engineer at Juniper proof-of-concept lab in Boston showed me the functionality once and it seemed to do the trick. See here, if you haven't already:
http://www.juniper.net/techpubs/en_US/junos10.1/topics/task/configuration/ospf-rvsp-lsp-backup-paths-configuring.html Adjusting metrics may help, but I wonder about scalability (administratively speaking) if your network changes much (from a number-of-devices perspective). David On 17 December 2010 13:16, Clarke Morledge <[email protected]> wrote: > I wanted to resurrect an older thread regarding the Loop Free Alternates > feature now available in Junos for OSPF and IS-IS. > > http://www.mail-archive.com/[email protected]/msg09719.html > > I am wondering if anyone has any pointers regarding what type of topologies > do not work so well and why. > > I am running LFA in an environment where I know that I have multiple paths > existing to where I need it, but unfortunately, I am not getting the type of > backup coverage that I would like. > > For example, certain types of square topologies do not work well for some > reason, but I am wondering if making link cost changes could rectify this > problem. > > Clarke Morledge > College of William and Mary > Information Technology - Network Engineering > Jones Hall (Room 18) > Williamsburg VA 23187 > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
