From: The IETF Routing Area, and the MPLS and CCAMP working groups
To: ITU-T SG-15 (Yoichi Maeda)
Cc: ITU-T WP 3 (Stephen Trowbridge)
Scott Bradner (IETF-ITU liaison manager)
Scott Brim (IETF-ITU NGN liaison manager)
Title: Liaison on issues related to T-MPLS (G.8110.1 and G.8112)
Response contact: Loa Andersson
Technical contact: Loa Andersson
Purpose: For action
Deadline 29th March 2006

Dear Mr. Maeda,

At the MPLS working group meeting in Dallas on March 20th there was a
brief discussion on the Transport MPLS (T-MPLS) work taking place in SG
13 and 15 of the ITU-T.

The IETF and the MPLS and the CCAMP working groups have not had an
opportunity to comment on the documents so far. We also learned that
there is only a short time left before the Recommendations are scheduled
to be completed through AAP.

We would like to ask that the ITU-T SGs liaise the draft recommendations
to the IETF, and in particular to the MPLS and CCAMP working groups, and
at the same time give us enough time to comment on the documents. We
appreciate that this may require a delay in the normal document process
in
the ITU-T, but we feel that this would be desirable in the interest
of cooperation between our organisations and for the wider benefit of
the industry. A process to change and extend the MPLS and CCAMP
specifications will be found in draft-andersson-rtg-gmpls-change-02. 
This process is being developed in cooperation with ITU-T, and we are 
working to incorporate the comments received based on this information 
exchange.

We believe that there may be some issues and concerns with the T-MPLS
work, but we have not yet been able to review it and the time frame for
the AAP will not allow a detailed coordinated response to this work.

If this it is not possible to give us time comment on these documents,
we are concerned that any Recommendations related to T-MPLS may be
incompatible with current and/or future work on MPLS.


MPLS working group co-chairs
Loa Andersson and George Swallow

CCAMP working group co-chairs
Adrian Farrel and Kireeti Kompella

IETF Routing Area Directors
Bill Fenner and Ross Callon