Liaison statement
Response to your ITU-T SG15 OTNT Standardization Work Plan

The CCAMP working group of the IETF thanks ITU-T SG15 for sharing their
"Optical Transport Networks & Technologies Standardization Work Plan" in a
liaison dated February 29th, 2008.

We have no specific comments on the plan, but would like to draw your attention
to work currently in progress within CCAMP to extend the GMPLS control plane
for use in Wavelength Switched Optical Networks (WSONs).

We have three working group drafts related to this topic as follows:

Framework for GMPLS and PCE Control of Wavelength Switched Optical Networks
(WSON)
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-wavelength-switched-framework-00.txt

Generalized Labels for G.694 Lambda-Switching Capable Label Switching Routers
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-gmpls-g-694-lambda-labels-02.txt

Routing and Wavelength Assignment Information Model for Wavelength Switched
Optical Networks
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-rwa-info-00.txt

At the moment, CCAMP has decided to split the effort into two parts:
1. Work on the Routing Wavelength Assignment (RWA) problem
2. Work on optical-impairment-based networking

At the moment effort is only being expended on the first of these, with the
problems of handling optical impairments being deferred for future work. Please
note that, at such a time that CCAMP does work with optical impairments, it is
not our intention to define impairments, but we will defer to the ITU-T on this.

Lastly, it has been observed in the course of our work that the modeling of
asymmetric switches such as ROADMs may be an area that the ITU-T would like to
work on.

Best regards,
Adrian Farrel and Deborah Brungard
IETF CCAMP Working Group Co-Chairs