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  • 1.  RSVP link-protection questions

    Posted 11-10-2022 00:37
    I came across a nice post on Traffic Protection on MPLS (RSVP)

    I have one question about the diagram in that post.
    There is an LSP r1-r7 (r1-r3-r6-r5-r7)

    Part 2. Link Protection
    The example configured link-protection to protect the link between r5 and r7.
    My question is whether I should configure all the rsvp -enabled interfaces with link-protection on all the transit routers from ingress to egress routers, or only on the interfaces facing each other between r5 and r7.

    I like to know which interfaces are exactly enabled with link-protection.

    From my lab, it seems only the interface fe-0/0/1 on R5 facing R7 needs to have link-protection enabled.

    Like to get some confirmation from more experienced people here.

    thanks a lot in advance !!

  • 2.  RE: RSVP link-protection questions
    Best Answer

    Posted 11-11-2022 00:10
    Correct.  Only R5's R7-facing interface needs to be configured for link-protection. This is because LSPs are unidirectional. 

  • 3.  RE: RSVP link-protection questions

    Posted 11-11-2022 00:14
    thanks a lot !!!

  • 4.  RE: RSVP link-protection questions

    Posted 11-20-2022 22:37
    One more question to bother.

    If the LSP r1-r7 (r1-r3-r6-r5-r7) is with an admin-group (Say Blue).  The bypass LSP has to be the same admin-group (Blue) ? 

    thanks !!