Suresh,
As for the comment from John Moy (circa July 2001) about the
availability of an inter-area OSPF draft, I do recall responding
that the inter-area draft was assuming additive properties to
TE metrics to advertise summary info. It is a mistake to assume
that all TE metrics can be additive. Below is a pointer to
the response I sent.
http://discuss.microsoft.com/SCRIPTS/WA-MSD.EXE?A2=ind0108&L=ospf&;
T=0&F=&S=&P=5937
Please look at draft-kompella-mpls-multiarea-te-03.txt, as
at least some of the approaches described in that draft
do *not* assume additive properties of TE metrics (and do not
advertise summary info).
Yakov.
Yakov - You are right. The draft does talk about different
mechanisms the MPLS signaling protocols could use to setup
LSPs in an AS spanning multiple areas. However, the draft is
not about inter-area OSPF TE.
The draft is about multi-area TE, as it describes how to solve
the problem of supporting TE in a multi-area environment.
Clearly, there is interplay between signalling protocols and
the extent of TE link state data base (TE-LSDB) a node has.
I believe, scenario-3 is where the inter-area OSPF-TE is in
place and all nodes in an area have the same information as
their ABRs do. This scenario presents the signalling protocols
with fast convergence in settign up an LSP, right.
Just to point out that quite a few scenarios described in
draft-kompella-mpls-multiarea-te-03.txt are supported with the TE
extensions that are subject to this Last Call. To repeat what
Kireeti said already "There is work going on to address multi-area
TE *that builds on this draft*."
Yakov.