The CCAMP Working Group of IETF would like to inform you of our work on
enhancing GMPLS’s support for Lambda Switching to support the new generation
of Lambda Switch Capable equipment (e.g. ROADMs and PXCs). GMPLS provides a
standard control plane in support of setting up (or restoring) a connection
for multiple technologies (e.g. photonic, TDM (SONET/SDH), Ethernet).
When GMPLS currently sets up an end-to-end wavelength connection (i.e.
a Lambda LSP), the label that identifies the Lambda to use only has local
context (between the neighboring nodes at the ends of the Lambda link). With
the recent progress on optical network technology and the capability to
activate/reroute an optical path over a larger domain comprised of DWDM,
ROADMs, and PXCs (e.g. G.680 Appendix III application), CCAMP participants are
interested to investigate these new applications to ensure the applicability
of GMPLS protocols for connection setup and path computation and whether
additional extensions are needed. The following document “Framework for GMPLS
and PCE Control of Wavelength Switched Optical Networks (WSON)” provides a
framework for our work effort:
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-wavelength-switched-framework-00.txt
Note, CCAMP is concerned with the GMPLS protocol aspects for control of
Lambda Switch Capable equipment. Work on characterization of optical signals,
devices, and fibers is not within our scope.
The first aspect being considered is a standardized wavelength
representation. The proposal for the wavelength label representation is based
on the grids used by G.694.1 and G.694.2. The following document “Generalized
Labels for G.694 Lambda-Switching Capable Label Switching Routers” describes
our proposal:
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-gmpls-g-694-lambda-labels-01.txt
Both of these documents are in a very early phase of development. As we
progress our work, we will be including aspects of G.680. We welcome any
comments you may have at this time on our work and we would appreciate if you
would keep us informed of your progress in this
area.