A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Make-Before-Break MPLS-TE LSP restoration and reoptimization procedure using Stateful PCE
Author(s) : Yosuke Tanaka
Yuji Kamite
Filename : draft-tanaka-pce-stateful-pce-mbb-00.txt
Pages : 15
Date : 2013-02-18
Abstract:
Stateful PCE (Path Computation Element) and its corresponding
protocol extensions provide a mechanism that enables PCE to do
stateful control of MPLS Traffic Engineering Label Switched Paths (TE
LSP). Stateful PCE supports manipulating the existing LSP's state
and attributes (e.g., bandwidth and route) and also creating totally
new LSPs in the network.
In the current MPLS TE network using RSVP-TE, LSPs are often
controlled by "make-before-break (M-B-B)" signaling by headend for
the purpose of LSP restoration and reoptimization. In most cases, it
is an essential operation to reroute LSP traffic without any data
disruption.
This document specifies the procedure of applying Stateful PCE's
control to make-before-break RSVP-TE signaling. In this document,
two types of restoration/reoptimization procedures are defined, one-
stroke mode and granular mode. This document also specifies the
usage and handling of stateful PCEP (PCE Communication Protocol)
messages, expected behavior of PCC as RSVP-TE headend and several
extensions of additional objects.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-tanaka-pce-stateful-pce-mbb
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-tanaka-pce-stateful-pce-mbb-00
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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