Re: [CCAMP] draft-ali-ccamp-rc-objective-function-metric-bound-03.txt

John E Drake <jdrake@juniper.net> Fri, 09 August 2013 17:57 UTC

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From: John E Drake <jdrake@juniper.net>
To: "Zafar Ali (zali)" <zali@cisco.com>, Fatai Zhang <zhangfatai@huawei.com>, "CCAMP (ccamp@ietf.org)" <ccamp@ietf.org>
Thread-Topic: [CCAMP] draft-ali-ccamp-rc-objective-function-metric-bound-03.txt
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Date: Fri, 9 Aug 2013 17:52:21 +0000
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Subject: Re: [CCAMP] draft-ali-ccamp-rc-objective-function-metric-bound-03.txt
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Zafar,

I don't think this addresses the balance of my comments.  AFAICT, you have added all but one of the PCEP objective functions into RSVP-TE.

Yours Irrespectively,

John

> -----Original Message-----
> From: Zafar Ali (zali) [mailto:zali@cisco.com]
> Sent: Friday, August 09, 2013 10:39 AM
> To: John E Drake; Fatai Zhang; CCAMP (ccamp@ietf.org)
> Subject: Re: [CCAMP] draft-ali-ccamp-rc-objective-function-metric-bound-
> 03.txt
> 
> -----Original Message-----
> 
> From: "jdrake@juniper.net" <jdrake@juniper.net>
> Date: Friday, August 9, 2013 1:06 PM
> To: zali <zali@cisco.com>om>, Fatai Zhang <zhangfatai@huawei.com>om>,
> "ccamp@ietf.org" <ccamp@ietf.org>
> Subject: RE: [CCAMP]
> draft-ali-ccamp-rc-objective-function-metric-bound-03.txt
> 
> >>Hi John/ Fatai-
> >>ERO expansion is an already supported functionality since early days
> >>of
> >>RSVP-
> >>TE and is widely deployed.  There is a new requirement to convey
> >>latency bound in TE networks. Hence a very simple and logical
> >>extension in RSVP TE to support the newly defined TE (latency)
> >>metrics.
> >
> >JD:  From the draft:  " In these scenarios, there is a need for the
> >ingress node to
> >       convey the optimization criteria including the TE metrics (e.g.,
> >IGP metric, TE
> >       metric, hop counts, latency, etc.) to be used for the path
> >computation to the
> >      node performing route computation or expansion."
> 
> John:
> 
> Some text was loose w.r.t. what is defined in the draft. So the real comment
> is on this sentence. Nonetheless, we can explicitly confine the scope of the
> draft to newly defined TE metrics (most important use case is latency; latency
> variation for completeness).
> 
> Thanks
> 
> Regards...Zafar
> 
>