The MPLS WG Archive

[Ping Pan <pingpan@juniper.net>]

"Kullberg, Alan" wrote:
> 
> I have a comment on draft-ietf-mpls-rsvp-lsp-fastreroute-00.txt.
> 
> >From section 5, 2nd paragraph:
> 
>    Upon receiving the local
>    protection requests for a protected LSP, the PLRs must try to
>    establish the detour LSPs immediately.
> 
> But section 7 states that before the CSPF computation can proceed,
> the PLR should collect the RRO detailing the downstream nodes and
> links.  This RRO is in the RESV.
> 
> Section 5 and 7 seem to be contradictory when the initial PATH
> message from the ingress node includes the FASTREROUTE object.
>

Not really. For one-to-one backup, the PLR will try to setup a detour
only AFTER the protected LSP is up and running. When a protected LSP is
up and running, the PLR can always get the RRO and all other junk from
the protected LSP to setup the detours.

- Ping