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Re: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt

Susan Hares <shares@ndzh.com> Tue, 19 July 2022 19:48 UTC

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From: Susan Hares <shares@ndzh.com>
To: Robert Raszuk <robert@raszuk.net>, Kaliraj Vairavakkalai <kaliraj=40juniper.net@dmarc.ietf.org>
CC: Ketan Talaulikar <ketant.ietf@gmail.com>, Srihari Sangli <ssangli@juniper.net>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt
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Date: Tue, 19 Jul 2022 19:48:36 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/BOsGujAPKT8HWf6kmH2gr5I6HkI>
Subject: Re: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt
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Robert and Kaliraj:

Please take this discussion to CAR-CT Adoption call Part 3.

Thank you, Sue

From: Robert Raszuk <robert@raszuk.net>
Sent: Tuesday, July 19, 2022 3:40 PM
To: Kaliraj Vairavakkalai <kaliraj=40juniper.net@dmarc.ietf.org>
Cc: Ketan Talaulikar <ketant.ietf@gmail.com>; Srihari Sangli <ssangli@juniper.net>; Susan Hares <shares@ndzh.com>; idr@ietf.org
Subject: Re: [Idr] Part 2 of CAR/CT Adoption call (7/6 to 7/20) - Adoption of draft-dskc-bess-bgp-car-05.txt and draft-kaliraj-idr-bgp-classful-transport-planes-17.txt

Hello Kaliraj, I think you have stated it very well below. BGP-CT follows RFC-8277. So tell me why the new forwarding paradigm needs to be glued to MPLS for years to come ? What if customers do not us
External (robert@raszuk.net<mailto:robert@raszuk.net>)
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Hello Kaliraj,

I think you have stated it very well below.

BGP-CT follows RFC-8277.

So tell me why the new forwarding paradigm needs to be glued to MPLS for years to come ?

What if customers do not use MPLS for forwarding or are in the process of migration away from it ?

Why put a burden on them about the notion of labels in what we all agree data plane agnostic signalling ?

Kind regards,
Robert


On Tue, Jul 19, 2022 at 7:10 PM Kaliraj Vairavakkalai <kaliraj=40juniper.net@dmarc.ietf.org<mailto:40juniper.net@dmarc.ietf.org>> wrote:
Ketan, to answer you question below,

BGP-CT follows RFC-8277 which is an existing standard. And proposes the
MNH-attribute (https://datatracker.ietf.org/doc/html/draft-kaliraj-idr-multinexthop-attribute-02<https://shared.outlook.inky.com/link?domain=datatracker.ietf.org&t=h.eJxFzUkOwjAQRNGrIK_xSBxiVlylHTfYZDDqdCQE4u4QNmzrS69eYqVRnHYiM9-Xk9YJGJigH5BUQb6oSledaq8zT6NOBBeWA4yF4CZLIjmtI5cZH5zrXQIzlbgySuPEfieGTZ6Rv4Y1vmuDdXrJQLic5_TMqq-Tjsc2OuggBNP44EJ3xCZab0KTjHf2oG3rO-dDa73yzabiplKNSHwmWJ7roL4fW0m_8p_eH4RzRpE.MEUCICYtqQ1cOCQsz7Urlkc8A210IGE0vq_e3bapJ8_IgUZAAiEAs0tcMsY_c-_3ycTiV_J3cdQjnvndJdc6J6j9bFWASkw>)
that carries label in an attribute, for future scoping.

Just a seamless transition from where BGP is today, to where we want it to be in future.

We want the ‘future mechanism’ to work for existing families, in similar manner.
So there is no reason not to follow RFC-8277 today. And that is also why we should not carry
these forwarding information in NLRI of new families.

Thanks
Kaliraj

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