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Detour Backup

  • From: Nurit Sprecher <nurit.sprecher@SeabridgeNetworks.com>
  • Date: Thu, 31 Jul 2003 17:11:15 +0200
  • Cc: "'mpls@uu.net'" <mpls@UU.NET>

Hi all,

I have a question regarding the one-to-one (detour) backup that is described in the draft-ietf-mpls-rsvp-lsp-fastreroute-03.txt.
I would like to support the one-to-one backup method, using the path-specific method. 
I would like to protect the LSP R1-R2-R3-R4-R5-R6 in the figure below. At each PLR a detour is created and merged to the protected LSP as soon as possible. All over the way I would like to protect against the next hops (I.e. R2, R3, R4 and R5), but in R5 I would like to protect against the next link. How can I do it if the link between R5 and R6 is an unnumbered link? In the DETOUR Object I should put the Ipv4 address of the node (link?) to be avoided.
 
                  R1---R2---R3---R4---R5---R6
 
I’ll appreciate your response.
Thanks in advance, Nurit.