Subject: RE: [Pce] I-D ACTION:draft-ietf-pce-disco-proto-igp-02.txt

From: "LE ROUX Jean-Louis RD-CORE-LAN" <[email-masked]>
Date: Mon, 3 Jul 2006 17:30:44 +0200

Hi all,

Here are the major changes in this new version:

-A new bit in the path computation capabilities flag has been defined: The P bit that indicates whether the PCE can handle path constraints (e.g. max hop count, path metric bound).

-Three optional sub-TLVs for the PATH-COMP-CAP TLV defined to encode more complex capabilities: The Objective Functions sub-TLV that carries a list of supported objective functions, the Opaque Objective Function sub-TLV that allows the user to encode a specific 
objective function in any appropriate language, and the Switch Caps sub-TLV that carries a list of supported switching capabilities. 

-OSPFv3 procedures added (scope control with S1/S2 bits)

-The text related to the procedures to limit the impact on the IGP (dampening, hysteresis) has been updated, it is now normative (SHOULD) as requested in Dallas.

-Procedures for the PCE address TLV have been clarified: This TLV MUST be carried either once (v4 or V6) or twice (v4 & v6) within the PCED TLV.

-Removed PCED/PCES redundant elements of procedures.

-Also some edits for the sake of clarity.

We are waiting for your comments on this new version.

Regards,

JL 

> -----Message d'origine-----
> De : [email-masked] [mailto:[email-masked]] 
> Envoyé : mardi 27 juin 2006 21:50
> À : [email-masked]
> Cc : [email-masked]
> Objet : [Pce] I-D ACTION:draft-ietf-pce-disco-proto-igp-02.txt 
> 
> A New Internet-Draft is available from the on-line 
> Internet-Drafts directories.
> This draft is a work item of the Path Computation Element 
> Working Group of the IETF.
> 
> 	Title		: IGP protocol extensions for Path 
> Computation Element (PCE) Discovery
> 	Author(s)	: J. Le Roux, et al.
> 	Filename	: draft-ietf-pce-disco-proto-igp-02.txt
> 	Pages		: 37
> 	Date		: 2006-6-27
> 	
> There are various circumstances in which it is highly 
> desirable for a Path Computation Client (PCC) to be able to 
> dynamically and automatically discover a set of Path 
> Computation Element(s) (PCE), along with some of information 
> that can be used for PCE selection. 
> When the PCE is an LSR participating to the IGP, or even a 
> server participating passively to the IGP, a simple and 
> efficient way for PCE discovery consists of relying on IGP 
> flooding. For that purpose this document defines OSPF and 
> ISIS extensions for the advertisement of PCE Discovery 
> information within an IGP area or within the entire routing domain.
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-pce-disco-proto
> -igp-02.txt
> 
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