Subject: RE: question Fast-Reroute Resv manipulation

From: "Kavita Khanna" <[email-masked]>
Date: Wed, 29 May 2002 12:50:57 -0400

Doug,

Per FRR spec, LSRs must work under the assumption that any failed LSPs may
have been repaired upstream and new Path messages will soon arrive via the
bypass tunnel(s). They do not send PathTear and ResvErr messages immediately
upon link failure detection.

Hope that helps!

- Kavita

>-- Original Message --
>From: "Doug Degan" <[email-masked]>
>To: <[email-masked]>
>Subject: question Fast-Reroute Resv  manipulation
>Date: Tue, 28 May 2002 15:48:14 +0300
>
>
>consider this basic FRR  topology - primary protected LSP is configured
and
>bypass is ready for use if needed:
>
>[I]---[PLR]----[T]-----[MP]--------[E]
>         \                           /
>          \------------------/
>             BYPASS/DETOUR
>
>
>and the scenario:
>
>1) MP send RESV-MSG to T
>
>2) Link between PLR & T fails
>
>3) T get the RESV-MSG  - will it send RESV_ERR downstream cause the link
>is
>down?
>
>* should every router block RESV_ERR messages for protected LSP?
>
>
>
>thanks alot.
>