This document specifies identifiers for MPLS-TP objects. Included are
identifiers which are compatible with existing IP, MPLS, GMPLS, and
The identifiers apply to the ends of Label Switched Paths (LSPs) and
the ends of Pseudowires. They also apply to the identifiable objects
within Operations, Administration, and Maintenance (OAM)
Working Group Summary
This document defines a format for MPLS-TP LSP Identifiers based on
global node IDs (ie, IP addresses).
A previous version of this draft included MPLS-TP identifiers based on
ICCs (ITU Carrier Codes). However, late in the process, technical
problems with the global uniqueness of the ICC format were discovered.
Due to the anticipated delay in getting these issues resolved, the ICC
based identifiers have been removed from the document. It is anticipated
that a further document handling ICC based identifiers will be developed
once the issues have been resolved by the ITU-T.
There was a request from a few people to allow use of a global node ID
for one end of an LSP and an ICC based ID for the other end of the same
LSP. After extensive discussion on the MPLS WG email list, there was
a clear consensus to progress the document without support for mixed
use. Clearly this could not be done in any case until the issues with the
ICC based identifier have been resolved. Future work on "mixed mode"
identifiers was not ruled out.
Other than these issues there was little controversy, and the document
is needed for important ongoing work on MPLS-TP.
The document has been extensively reviewed and is an important basis
for ongoing work on MPLS-TP. Many of the identifiers using standard
IETF addressing fields are already implemented by default in MPLS and
pseudowire systems. A number of vendors are building MPLS-TP
solutions and will include identifier formats described in this document.
Ross Callon (email@example.com) is the Document Shepherd.
Adrian Farrel (firstname.lastname@example.org) is the Responsible AD