CCAMP <draft-bms-optical-sdhsonet-mpls-control-frmwrk-00.txt>

[Vishal Sharma <vishal@JasmineNetworks.com>]

NAME OF I-D

http://search.ietf.org/internet-drafts/draft-bms-optical-sdhsonet-mpls-contr
ol-frmwrk-00.txt

SUMMARY


The suite of protocols that define Multi-Protocol Label Switching
   (MPLS) is in the process of enhancement to generalize its
   applicability to the control of non-packet based switching, that is,
   optical switching.  One area of prime consideration is to use this
   generalized MPLS in upgrading the control plane of optical transport
   networks.  This draft illustrates this process by describing how
   MPLS is being extended to control SONET/SDH networks.  SONET/SDH
   networks are exemplary examples of this process since they possess a
   rich multiplex structure, a variety of protection/restoration
   options, are well defined, and are widely deployed. The extensions
   to MPLS routing protocols to disseminate information needed in
   transport path computation and network operations are discussed
   along with the extensions to MPLS label distribution protocols
   needed for provisioning of transport circuits. New capabilities that
   an MPLS control plane would bring to SONET/SDH networks, such as new
   restoration methods and multi-layer circuit establishment, are also
   discussed.


RELATED DOCUMENTS
1. Generalized MPLS - Signaling Functional Description
draft-ietf-mpls-generalized-signaling-04.txt
http://search.ietf.org/internet-drafts/draft-ietf-mpls-generalized-signaling
-04.txt

2. Generalized Multi-Protocol Label Switching (GMPLS) Architecture
draft-many-gmpls-architecture-00.txt
http://search.ietf.org/internet-drafts/draft-many-gmpls-architecture-00.txt

3. Generalized MPLS Signaling - CR-LDP Extensions
draft-ietf-mpls-generalized-cr-ldp-03.txt
http://search.ietf.org/internet-drafts/draft-ietf-mpls-generalized-cr-ldp-03
.txt

4. Generalized MPLS Signaling - RSVP-TE Extensions
draft-ietf-mpls-generalized-rsvp-te-03.txt
http://search.ietf.org/internet-drafts/draft-ietf-mpls-generalized-rsvp-te-0
3.txt

5. Some Comments on GMPLS and Optical Technologies
draft-bernstein-gmpls-optical-00.txt
http://search.ietf.org/internet-drafts/draft-bernstein-gmpls-optical-00.txt

WHERE DOES IT FIT IN THE PICTURE OF THE SUB-IP WORK

  Applications         +-------+  +-------+        (new) Hour glass
  that use CCAMP: \    | TE-WG |  | PPVPN |  ...           /
                   \   +-------+  +-------+               /
                    \     +----------------------+       /
                     \    |         CCAMP        |      /
                      \   |-----------+----------|     /  
                      /   |   C       |    M   --|------ IGP LSA ext
                     /    | control   | measure  |     \  
                    /     +----------------------+      \
  Technologies to  / +----+ +----+ +----+ +----+ +----+  \
  measure/control:/  |MPLS| |OPT | |RPR | |ATM | | FR |...\
                     +----+ +----+ +----+ +----+ +----+


This ID fits in CCAMP, since it fits in with CCAMPs charter
to define signalling and measurement protocols that support multiple
physical path and tunnel technologies. In particular, it explains
why and how the signalling and routing protocols must modified to support
TDM networks.

WHY IS IT TARGETED AT THIS WG

The draft is targeted at the CCAMP WG, since it addresses several items
of the WG charter by way of explaining how IP signaling and routing
protocols need to be modified to support the automatic configuration
of TDM networks. In particular it provides explanations that pertain
to the following items from the WG charter:

- Define signalling protocols and measurement protocols such that they
support multiple physical path and tunnel technologies (e.g. O-O and O-E-O
optical switches, ATM and Frame Relay switches, MPLS, GRE) using input from
technology-specific working groups such as MPLS, IPO, etc. 

- Abstract link and path properties needed for link and path protection.
Define signalling mechanisms for path protection, diverse routing and fast
path restoration. Ensure that multi-layer path protection and restoration
functions are achievable using the defined signalling and measurement
protocols, either separately or in combination. 

- Define how the properties of network resources gathered by the measurement
protocol 
can be distributed in existing routing protocols, such as OSPF and IS-IS. 


JUSTIFICATION

Since this draft explains in detail the modifications to the signaling
and routing protocols to support TDM networks, and provides justification
for why those modifications were selected, it complements the actual
functional specification drafts mentioned in "RELATED DOCUMENTS."