The MPLS WG Archive

["Thomas D. Nadeau" <tnadeau@cisco.com>]

>5. How can we represent label-stacking in LDP via this MIB. The
>label-stacking could be either
>- LDP LSPs over RSVP-TE tunnels.
>- PWE-LDP (Martini) LSPs over core LDP/RSVP - LSPs.
>
>Suggestion - Each core LSP (LDP/RSVP) can be represented by an if-index
>in the IF-MIB. If we include the if-index in the above tables then we
>can find out whether the LSP goes via a physical-interface or a
>'tunnel-interface'.

         I don't understand how assigning an IfIndex to an LSP is going to
work.  This sounds like something that is implementation-specific.
The label stack is represented either in the LSR MIB as it is
defined today.  If you want to see the application-specific label,
then look in the PWE3 MIBs as a short-hand. The PPVPN-MPLS-VPN MIB is
also going to be modified to show the VPN label as well.  However,
in either case, the ingress labels should be available in the LSR MIB
as a point of reference.

         --Tom




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