Re: [Pce] I-D Action: draft-tanaka-pce-stateful-pce-mbb-00.txt

[Yuji Kamite <[e-mail]>]

Hi all PCEres, 

Attached I share the summary slides.  Your feedback is much appreciated.

This can partly be positioned as feedback to current stateful PCE's base specs, so we really welcome suggestion from their editors too.

Regards,
-Yuji


-----Original Message-----
From: Yuji Kamite（上手祐治） 
Sent: Friday, March 08, 2013 5:11 PM
To: [e-mail]
Subject: FW: I-D Action: draft-tanaka-pce-stateful-pce-mbb-00.txt

Hi folks,

Because of the shortness of presenting time in Orlando, let me briefly introduce our document recently posted here:

This I-D is trying to give a full detail of procedures of applying stateful-PCE to "make-before-break (M-B-B)" signaling in RSVP-TE.  

Two types of methods are described.  They can be chosen depending on SP's intended operation.
  (A) One-stroke mode:  basic and simple method, full-automatic procedure
  (B) Granular mode:  advanced method, step-by-step sequencing procedure

At this moment, stateful-PCE's base spec document (WG I-D) doesn't　have a clear description about how to conduct M-B-B from stateful-PCE. That's why we  provided (A) "One-stroke mode", which would be a sort of complementary proposal to PCE WG.

(B) "Granular mode" is positioned as another method to help operators/controllers do more flexible control in traffic switching timing, which is effective in several new use cases. 

M-B-B is a quite fundamental operation in today's MPLS network deployment, so we'd like to gaugue WG's interest in it under stateful-PCE's context.

We'd appreciate your comments and feedback.
Best regards,

Yuji Kamite
NTT Communications


-----Original Message-----
From: [e-mail] [mailto:[e-mail]] On Behalf Of [e-mail]
Sent: Monday, February 18, 2013 9:41 PM
To: [e-mail]
Subject: I-D Action: draft-tanaka-pce-stateful-pce-mbb-00.txt


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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