2 Feb 2008 00:41
Fw: New Liaison Statement, "Respnse to Your Liaison on GMPLS Calls"
Adrian Farrel <adrian <at> olddog.co.uk>
2008-02-01 23:41:01 GMT
2008-02-01 23:41:01 GMT
----- Original Message ----- From: "Adrian Farrel (IETF CCAMP WG)" <adrian <at> olddog.co.uk> To: "Greg Jones" <greg.jones <at> itu.int> Cc: "Kam Lam" <hklam <at> alcatel-lucent.com>; "Stephen Trowbridge" <sjtrowbridge <at> alcatel-lucent.com>; "Ross Callon" <rcallon <at> juniper.net>; "Dave Ward" <dward <at> cisco.com>; "Scott Bradner" <sob <at> harvard.edu>; "CCAMP Mailing List" <ccamp <at> ops.ietf.org>; "Adrian Farrel" <adrian <at> olddog.co.uk>; "Deborah Brungard" <dbrungard <at> att.com>; "Adrian Farrel" <adrian <at> olddog.co.uk>; "Deborah Brungard" <dbrungard <at> att.com> Sent: Friday, February 01, 2008 11:23 PM Subject: New Liaison Statement, "Respnse to Your Liaison on GMPLS Calls" > > Title: Respnse to Your Liaison on GMPLS Calls > Submission Date: 2008-02-01 > URL of the IETF Web page: > https://datatracker.ietf.org/public/liaison_detail.cgi?detail_id=414 > > From: Adrian Farrel(IETF CCAMP WG) <adrian <at> olddog.co.uk> > To: ITU-T Q14/15(Greg Jones <greg.jones <at> itu.int>) > Cc: Kam Lam <hklam <at> alcatel-lucent.com> > Stephen Trowbridge <sjtrowbridge <at> alcatel-lucent.com> > Ross Callon <rcallon <at> juniper.net> > Dave Ward <dward <at> cisco.com> > Scott Bradner <sob <at> harvard.edu> > CCAMP Mailing List <ccamp <at> ops.ietf.org> > Reponse Contact: Adrian Farrel <adrian <at> olddog.co.uk> > Deborah Brungard <dbrungard <at> att.com> > Technical Contact: Adrian Farrel <adrian <at> olddog.co.uk> > Deborah Brungard <dbrungard <at> att.com> > Purpose: In response > Body: Thank you for your liaison to CCAMP on GMPLS Calls from your > Stuttgart interim meeting in September 2007. > > In your liaison, you noted that the GMPLS call is assumed to be as general > as possible, and you asked what other call applications there may be in > addition to ASON and the CCAMP VCAT draft. At this moment, there are four > applications on which the CCAMP working group is working where GMPLS calls > are applied. The first two are ASON and VCAT as you note. The third is > related to ASON and is the multi-layer network. The fourth provides > support for the MEF UNI in coordination with the OIF. Other topics in the > future might include OAM coordination, billing, and client-facing port > capability negotiation. > > Your observations about how TNA information is not used in the propagation > or delivery of the [call] message, but may be used [by call controllers] > to identify the destination UNI and hence [the destination] Network Call > Controller agrees with our understanding and intentions. In practice, a > large range of information may be used by call controllers to route > calls - that is, to select a series of call controllers between call > source and call destination - although we would not wish to preclude > source-routing of calls. It is our intention that the generic call message > should be capable of being extended to carry any information required by > any application of the call message. > > In this light you ask for guidance on how to carry ASON call information > across a GMPLS network so that it can be reconstructed at ASON call > boundaries, and say that you support the resumption of work on a CCAMP I-D > on ASON applicability to address the above and would welcome the > opportunity to contribute through liaisons. We welcome your support and > look forward to working with you in this context. As above, we note that > the GMPLS call message (the Notify message) is not limited to the exchange > of information between call end points, but can also exchange information > between transit call controllers by forming call segments as described in > section 7.3.1 of RFC 4974. Work on carrying ASON call information within a > GMPLS call message falls within the CCAMP charter and we hope that > interested parties will bring ideas forward through the normal process > which is, of course, contribution-driven. We would welcome input from all > sources either through the CCAMP mailing list or throu > gh liaisons. > > Best regards, > Adrian Farrel and Deborah Brungard > CCAMP working group co-chairs > Attachment(s): > No document has been attached > > >