RE: [Pce] draft-leroux-pce-of-00.txt

Hi Jerry,

Thanks for the feedback and comments.

Please see inline, 

> -----Message d'origine-----
> De : ASH, GERALD R, ATTLABS [mailto:gash@att.com] 
> Envoyé : samedi 3 mars 2007 01:54
> À : LE ROUX Jean-Louis RD-CORE-LAN; pce@ietf.org
> Cc : ASH, GERALD R, ATTLABS
> Objet : RE: [Pce] draft-leroux-pce-of-00.txt 
> 
> Hi JL,
> 
> Looks like a good start.  
> 
> Looking through the IANA section, I don't see registration of 
> the objective functions (OFs) required in Section 5.1.17 of
> http://www.ietf.org/internet-drafts/draft-leroux-pce-of-00.txt:
> 
> "  The PCECP MUST support at least the following "unsynchronized"
>    functions:
> 
> - Minimum cost path with respect to a specified metric
>      (shortest path)
>    - Least loaded path
>    - Maximum available bandwidth path
> 
>    Also, the PCECP MUST support at least the following "synchronized"
>    objective functions:
> 
>    - Minimize aggregate bandwidth consumption on all links
>    - Maximize the residual bandwidth on the most loaded link
>    - Minimize the cumulative cost of a set of diverse paths"
> 
> Shouldn't these standard OFs and their parameters be 
> registered from the start?

Actually we prefer to keep this draft generic, and define specific objective functions in other documents. For instance draft-lee-pce-global-concurrent-optimization-02.txt requests for three code points within the OF registry.

> 
> It would also be useful to illustrate how each of these OFs 
> are encoded, perhaps in an illustrative appendix.
> 
> How can new OFs be specified, 
>i.e., how will extensibility of 
> OFs and their parameters be accommodated?

The OF is identified by a 16 bit code point.
A document that defines a new OF will request IANA for a code point within the OF code point registry.
We will clarify in next revision.

Regards, 

JL

> 
> Thanks,
> Regards,
> Jerry
> 
> ________________________________
> 
> From: LE ROUX Jean-Louis RD-CORE-LAN
> [mailto:jeanlouis.leroux@orange-ftgroup.com]
> Sent: Wednesday, February 28, 2007 11:39 AM
> To: pce@ietf.org
> Subject: [Pce] draft-leroux-pce-of-00.txt 
> 
> Hi all, 
> 
> This new draft defines PCED and PCEP extensions for the 
> encoding of objective functions. 
> We are waiting for WG feedback/comments. 
> 
> http://www.ietf.org/internet-drafts/draft-leroux-pce-of-00.txt.
> 
> Regards, 
> 
> JL
> 

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