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Re: [Teas] <draft-sitaraman-sr-rsvp-coexistence-rec> -- Open Thread

Rakesh Gandhi <rgandhi.ietf@gmail.com> Tue, 15 November 2016 09:48 UTC

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From: Rakesh Gandhi <rgandhi.ietf@gmail.com>
Date: Tue, 15 Nov 2016 18:48:20 +0900
Message-ID: <CAMZsk6cQRvCNC1ob3Y3TD5aXMsOpkbVT9-Qi9B2=LD84GmS5oQ@mail.gmail.com>
To: Vishnu Pavan Beeram <vishnupavan@gmail.com>
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Cc: "Rakesh Gandhi (rgandhi)" <rgandhi@cisco.com>, Dhruv Dhody <dhruv.dhody@huawei.com>, "teas@ietf.org" <teas@ietf.org>
Subject: Re: [Teas] <draft-sitaraman-sr-rsvp-coexistence-rec> -- Open Thread
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Hi Pavan,

For the option where max-res-bw is adjusted, it would be good to add in the
document what happens to Diff-Serve TE BC model RDM, MAM and MAR bandwidth
pools.

Thanks,
Rakesh


On Tue, Nov 15, 2016 at 10:20 AM, Vishnu Pavan Beeram <vishnupavan@gmail.com
> wrote:

> Folks, Hi!
>
> We presented <draft-sitaraman-sr-rsvp-coexistence-rec> in yesterday's
> morning session. Unfortunately, we didn't have any time left to take
> questions. So, I'm opening up a thread for folks to post their
> questions/concerns.
>
> Dhruv (on cc) had a couple of questions and I'll start this thread with
> responses to those --
>
> (1) Why can't you do only SR on the controller and leave RSVP-TE control
> stay distributed?
> The base requirement for this “co-existence arrangement” is to ensure
> that the placement of SR LSPs in the same domain DOES NOT introduce any
> inaccuracies in the TED that is used by distributed or centralized RSVP
> Path computation engines. If your SR-LSPs are management by a centralized
> controller and you don't have the SR utilization information somehow
> reflected in the TED used by distributed RSVP-TE path computation engines,
> it would result in the TED information being not accurate.
>
> (2) With Option-5, wouldn't there be issues if not all nodes in the
> network support the recommended procedure?
> You do need the recommended procedure to be applied on all RSVP-TE nodes
> in the domain. If not, the TED information would not be completely
> accurate. This is TRUE for the other options as well -- the chosen option
> would need to be uniformly applied to all relevant nodes in the network.
>
> Regards,
> -Pavan
>
> ps: I believe Rakesh (on cc) had a question as well, but couldn't get his
> chance. @Rakesh -- Please do post your question here and we (the authors)
> will respond to it.
>
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