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Protocol Action: 'RSVP Extensions for Path Key Support' to Proposed Standard
The IESG has approved the following document:
- 'RSVP Extensions for Path Key Support '
<draft-ietf-ccamp-path-key-ero-04.txt> as a Proposed Standard
This document is the product of the Common Control and Measurement Plane
Working Group.
The IESG contact persons are Ross Callon and Adrian Farrel.
A URL of this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-path-key-ero-04.txt
Technical Summary
The paths taken by Multiprotocol Label Switching (MPLS) and
Generalized MPLS (GMPLS) Traffic Engineering (TE) Label Switched
Paths (LSPs) may be computed by Path Computation Elements (PCEs).
Where the TE LSP crosses multiple domains, such as Autonomous Systems
(ASes), the path may be computed by multiple PCEs that cooperate,
with each responsible for computing a segment of the path.
To preserve confidentiality of topology within each AS, the PCEs
support a mechanism to hide the contents of a segment of a path (such
as the segment of the path that traverses an AS), called the
Confidential Path Segment (CPS), by encoding the contents as a Path
Key Subobject (PKS) and embedding this subobject within the result of
its path computation.
This document describes how to carry Path Key Subobjects in the
Resource Reservation Protocol (RSVP) Explicit Route Objects (EROs)
and Record Route Object (RROs) so as to facilitate confidentiality in
the signaling of inter-domain TE LSPs.
Working Group Summary
Good consensus reported (see PROTO writeup by Deborah Brungard).
The draft was reviewed in last call by the CCAMP and PCE working
groups, as well as IETF last call.
A last-minute question was raised on the number of bits assigned
to the path key ID (should 16 be extended to 32). This was resolved
in discussions on the PCE mailing list, and it was decided to leave
it at 16 consistent with draft-ietf-pce-path-key-05.txt.
Document Quality
There are several interoperable implementations of
draft-ietf-pce-path-key-05.txt. These implementations are of
no value without the extensions defined in this draft (since a
computed path is of no value if you can't signal it).
There is one known experimental implementation of the
extensions defined in this draft.
Personnel
Deborah Brungard is the Document Shepherd. Ross Callon is the
responsible AD.