A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Encoding of Data Structure (DS) in the Path Computation Element Communication Protocol (PCEP)
Author(s) : Dhruv Dhody
Udayasree Palle
Filename : draft-dhody-pce-pcep-ds-02.txt
Pages : 19
Date : 2012-08-17
Abstract:
The ability to compute shortest constrained Traffic Engineering Label
Switched Paths (TE LSPs) in Multiprotocol Label Switching (MPLS) and
Generalized MPLS (GMPLS) networks across multiple domains has been
identified as a key requirement for P2P and P2MP scenarios.
Backward-Recursive PCE-Based Computation (BRPC) [RFC5441] defines
VSPT [Virtual Shortest Path Tree] as a default de-facto data
structure for PCRep message in inter-domain scenarios.
AS PCE will get used in newer scenarios like inter-domain,
protection, P2MP etc. As well as PCE is being explored to be used in
Cross Stratrum Optimization (CSO) environment (see [CSO-PCE]).
Limiting PCEP protocol to just one data structure limits the usage of
PCEP. Its important to keep PCEP generic enough to use differnt data
structure and apply different algorithms.
This document defines extensions to the PCE communication Protocol
(PCEP) to allow multiple data structures. Extensions are defined for
PCE to indicate the set of Data Structure (DS) it supports; also PCC/
PCE can indicate in a path computation request the required DS, and a
PCE can report in a path computation reply the Data Structure that
was used in the path reply message.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-dhody-pce-pcep-ds
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-dhody-pce-pcep-ds-02
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-dhody-pce-pcep-ds-02
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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