RE: I-D ACTION:draft-ash-multi-area-te-reqmts-01.txt

[Jim Boyle <jboyle@pdnets.com>]

On Mon, 3 Dec 2001, Ash, Gerald R (Jerry), ALCTA wrote:

> We would like to call for agreement that

I for one will disagree with your proposal of need for additional
(ancillary?) requirements documents at this time.

In the interest of progress, I would suggest we just strike the sentences
which call for more requirements documents (from within the requirements
documents on the matter!) ,  or leave them there and see what's on the
table of technical proposals.  The sentence "... may need to be extended."
captures the scope sufficiently, I'm not sure another 40 pages of
requirements discussion will be of any practical result.

> > a) draft-ietf-tewg-restore-hierarchy-00.txt calls for multi-area TE
> requirements to be generated, but contains no such requirements (Section 3
> says "requirements for multi-area traffic engineering need to be developed
> to provide guidance for any necessary protocol extensions"), and
> b) draft-ash-multi-area-te-reqmts-01.txt be adopted as a multi-area TE
> requirements draft.
>
> In addition, Section 6.3 of draft-ietf-tewg-restore-hierarchy-00.txt says
> "To support edge-to-edge signaling in the above network scenarios within the
> framework of existing horizontal hierarchies, current traffic engineering
> (TE) methods [19, 5] may need to be extended. Requirements for multi-area TE
> need to be developed to provide guidance for any necessary protocol
> extensions."
>
> In regard to 'necessary protocol extensions', there are numerous multi-area
> TE approaches, so there is a need to converge on one or a subset of the
> approaches (rather than support them all).
> draft-ash-multi-area-te-rqmts-01.txt summarizes what protocol extensions
> have been proposed by various multi-area TE drafts, including:
> http://search.ietf.org/internet-drafts/draft-kompella-mpls-multiarea-te-02.t
> xt
> http://search.ietf.org/internet-drafts/draft-venkatachalam-interarea-mpls-te
> -02.txt
> http://search.ietf.org/internet-drafts/draft-vasseur-mpls-computation-rsvp-0
> 0.txt
> http://www.ietf.org/internet-drafts/draft-lee-mpls-path-request-02.txt
> http://www.ietf.org/internet-drafts/draft-iwata-mpls-crankback-02.txt.
>
> draft-ash-multi-area-te-rqmts-01.txt also compares the
> advantages/disadvantages of each proposed multi-area TE method, and how well
> the method meets the proposed requirements.  The analysis can be used to
> focus discussion and to select among the approaches.
>
> In summary, we would like to hear any objections to adopting
> draft-ash-multi-area-te-rqmts-01.txt as a multi-area TE requirements draft.
>
> Thanks,
> Jerry Ash
>
>
> -----Original Message-----
> From: Internet-Drafts@ietf.org [mailto:Internet-Drafts@ietf.org]
> Sent: Friday, November 30, 2001 6:00 AM
> To: IETF-Announce; @wsscan.att.com
> Subject: I-D ACTION:draft-ash-multi-area-te-reqmts-01.txt
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>
> 	Title		: Requirements for Multi-Area TE
> 	Author(s)	: J. Ash et al.
> 	Filename	: draft-ash-multi-area-te-reqmts-01.txt
> 	Pages		: 16
> 	Date		: 29-Nov-01
>
> This draft describes requirements for multi-area TE within the context of
> GMPLS.  Based on the requirements, the goal is to eventually provide
> protocol extensions needed for multi-area TE.  Various approaches to
> multi-area TE are considered, and these approaches are evaluated against the
> requirements.  These approaches include state dependent routing (SDR) LSP
> selection, event dependent routing (EDR) LSP selection, and time dependent
> routing (TDR) LSP selection.  These approaches include needs to support
> path-computation server (PCS) functionality, query functionality, crankback
> functionality, TE feedback functionality, and summary-LSA functionality. The
> target in future releases of this document will be to converge on a reduced
> subset of the required multi-area TE methods and protocol
> extensions.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ash-multi-area-te-reqmts-01.txt
>
>