The MPLS WG Archive

[Yakov Rekhter <yakov@juniper.net>]

George,

> draft-ietf-mpls-rsvp-unnum-02.txt allows both the normal HOP and the
> IF_ID Hop object to be used on an unnumbered link.  This leads to
> unnecessary cases and extra checking at the incoming interface.
> 
> I suggest the following modifications:
> 
> a) mandate that one always use the IF_ID HOP object on an unnumbered
>    link.
> 
> b) pop the unnumbered interface subobject off of the ERO before
>    forwarding the Path message over the unnumbered link (the
>    information is now in the PHOP

May I also suggest that we change the semantics of the Unnumbered
Interface ID subobject in the ERO from:

   The Interface ID is the outgoing interface identifier with respect to
   the LSR specified by the router ID.

to

   The Interface ID is the incoming interface identifier with respect to
   the LSR specified by the router ID.

Yakov.