Re: [CCAMP] Objective function draft
"Adrian Farrel" <adrian@olddog.co.uk> Tue, 11 September 2012 23:39 UTC
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From: Adrian Farrel <adrian@olddog.co.uk>
To: "'George Swallow (swallow)'" <swallow@cisco.com>, 'Julien Meuric' <julien.meuric@orange.com>
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Date: Wed, 12 Sep 2012 00:39:07 +0100
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Cc: ccamp@ietf.org
Subject: Re: [CCAMP] Objective function draft
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<individual contributor mode> I'm hoping that you have looked at RFC 5623 that describes some approaches to inter-layer networking using PCE. But it seems that perhaps you are more interested in the per-domain PCE mechanism (RFC 5152) and that you have observed that the OF that would be used in each domain to select the path is not currently available because it is missing from RSVP-TE. That seems to me to be a perfectly reasonable thing to add to RSVP-TE and I think it enables and supports the work of the PEC working group without any conflict, but I would hope that you share definitions of OFs with the PCE WG. And one last point, when you say > even if there is no PCE you misunderstand the PCE architecture. If you are computing a path (in an LSR) you are de facto providing PCE functionality. There is no need in the architecture (and thus the implementation) to expose an external (PCEP) interface in order to be logically providing PCE function, and this is *exactly* why you want access to the OF. However, you would perhaps do better to absorb this ambivalence and note that you need the OF and Metric whether or not the PCE is external. All of which you may take as general support for your idea, but a feeling that the I-D is not happily written and deviating too much from shared context with PCE. Cheers, Adrian From: ccamp-bounces@ietf.org [mailto:ccamp-bounces@ietf.org] On Behalf Of George Swallow (swallow) Sent: 11 September 2012 20:29 To: Julien Meuric Cc: ccamp@ietf.org Subject: [CCAMP] Objective function draft Julien - Reading the CCAMP notes (which capture little of the actual discussion) I see that there may have been a perception in the room that PCE functionality at the UNI-N was assumed (actual or proxy). This is not the case. The reason for our draft is that with the UNI, much of the functionality that resides at the headend is moved to the UNI-N. So the UNI-C needs a way to express an objective function even if there is no PCE. Operationally it seems burdensome to require a PCEP at the UNI-C and a PCEP at the UNI-N, when all that is being done is enabling the UNI-N to perform what the client would do if it were connected to the network via a normal link. Do you still object to the draft? Thanks, .George
- Re: [CCAMP] Objective function draft George Swallow (swallow)
- [CCAMP] Objective function draft George Swallow (swallow)
- Re: [CCAMP] Objective function draft Adrian Farrel
- Re: [CCAMP] Objective function draft George Swallow (swallow)
- Re: [CCAMP] Objective function draft Daniele Ceccarelli
- Re: [CCAMP] Objective function draft Julien Meuric
- Re: [CCAMP] Objective function draft George Swallow (swallow)
- Re: [CCAMP] Objective function draft Dieter Beller
- Re: [CCAMP] Objective function draft Gert Grammel
- Re: [CCAMP] Objective function draft Dieter Beller
- Re: [CCAMP] Objective function draft Julien Meuric
- Re: [CCAMP] Objective function draft Daniele Ceccarelli
- Re: [CCAMP] Objective function draft Julien Meuric
- Re: [CCAMP] Objective function draft JP Vasseur (jvasseur)
- [CCAMP] R: Objective function draft BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] Objective function draft George Swallow (swallow)
- Re: [CCAMP] Objective function draft Vishnu Pavan Beeram
- Re: [CCAMP] Objective function draft Ong, Lyndon
- Re: [CCAMP] Objective function draft Igor Bryskin
- Re: [CCAMP] Objective function draft John E Drake
- Re: [CCAMP] UNI/NNI (was: Objective function draf… Julien Meuric
- Re: [CCAMP] UNI/NNI (was: Objective function draf… Daniele Ceccarelli
- Re: [CCAMP] Objective function draft Gert Grammel
- Re: [CCAMP] Objective function draft John E Drake
- Re: [CCAMP] UNI/NNI Julien Meuric
- Re: [CCAMP] Objective function draft Lou Berger
- Re: [CCAMP] Objective function draft Julien Meuric
- Re: [CCAMP] Objective function draft John E Drake
- Re: [CCAMP] Objective function draft Julien Meuric
- Re: [CCAMP] Objective function draft Igor Bryskin
- Re: [CCAMP] Objective function draft Gert Grammel
- Re: [CCAMP] Objective function draft Lou Berger
- Re: [CCAMP] Objective function draft Igor Bryskin
- Re: [CCAMP] Objective function draft Lou Berger
- Re: [CCAMP] Objective function draft Dieter Beller
- Re: [CCAMP] Objective function draft John E Drake
- Re: [CCAMP] Objective function draft Igor Bryskin