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

"Zafar Ali (zali)" <zali@cisco.com> Fri, 09 August 2013 17:45 UTC

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From: "Zafar Ali (zali)" <zali@cisco.com>
To: John E Drake <jdrake@juniper.net>, 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 17:38:59 +0000
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Subject: Re: [CCAMP] draft-ali-ccamp-rc-objective-function-metric-bound-03.txt
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-----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