Re: [CCAMP] Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Path Diversity using Exclude Routes

John E Drake <jdrake@juniper.net> Wed, 09 October 2013 19:14 UTC

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From: John E Drake <jdrake@juniper.net>
To: "Zafar Ali (zali)" <zali@cisco.com>, Fatai Zhang <zhangfatai@huawei.com>, "Zhangxian (Xian)" <zhang.xian@huawei.com>, "CCAMP (ccamp@ietf.org)" <ccamp@ietf.org>
Thread-Topic: [CCAMP] Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Path Diversity using Exclude Routes
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Date: Wed, 09 Oct 2013 19:14:03 +0000
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Subject: Re: [CCAMP] Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Path Diversity using Exclude Routes
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Zafar,

Snipped, comment inline.

Yours Irrespectively,

John

> -----Original Message-----
> From: Zafar Ali (zali) [mailto:zali@cisco.com]
> Sent: Wednesday, October 09, 2013 12:54 AM
> To: Fatai Zhang; Zhangxian (Xian); CCAMP (ccamp@ietf.org)
> Cc: John E Drake
> Subject: Re: [CCAMP] Resource ReserVation Protocol-Traffic Engineering
> (RSVP-TE) Path Diversity using Exclude Routes
> 
> Fatai and John:
> 
> In most of the cases, when the UNI-N node computing the path is also
> hosting the RSVP-TE FEC against which exclusion is required, it knows the
> path take by the other LSP. For the other cases, please note that just
> because optical network is running GMPLS UNI for client interface does not
> mean that it is running RSVP-TE for the optical trail management. E.g., optical
> trail management can still using an already deployed proprietary mechanisms
> or an NMS based scheme. The draft is addressing schemes that are capable
> of this functionality.

[JD]  So, you are finally admitting that despite what your draft currently states, your draft only works
If the server network is controlled by a single omniscient entity.  As I said before, this is useless.