Re: [Lsr] Last Call: <draft-ietf-lsr-isis-srv6-extensions-14.txt> (IS-IS Extension to Support Segment Routing over IPv6 Dataplane) to Proposed Standard

Alvaro Retana <aretana.ietf@gmail.com> Wed, 12 May 2021 14:16 UTC

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From: Alvaro Retana <aretana.ietf@gmail.com>
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References: <161912242429.12485.17590245376033356793@ietfa.amsl.com> <AM0PR07MB638668F6AC767504D0534925E05B9@AM0PR07MB6386.eurprd07.prod.outlook.com> <98456c8b-42dc-a387-0a18-f7921a94aeb1@cisco.com> <CAMMESsyzYoS=rR4RV1exdA-5DTMv6j2muNqrgWJ6oNocVgT0ug@mail.gmail.com> <CY4PR05MB357658E33E3CE2AFAE611690D5539@CY4PR05MB3576.namprd05.prod.outlook.com> <BY5PR11MB4337DA9E433B99F14413EE4CC1539@BY5PR11MB4337.namprd11.prod.outlook.com> <4a20282686224d84a76a53361117793f@huawei.com> <4688_1620805916_609B891C_4688_3_1_53C29892C857584299CBF5D05346208A4CD9BCDA@OPEXCAUBM43.corporate.adroot.infra.ftgroup> <0cd83802-7a40-2350-708d-8f0d15811129@cisco.com> <8582_1620807889_609B90D1_8582_438_1_53C29892C857584299CBF5D05346208A4CD9BE1B@OPEXCAUBM43.corporate.adroot.infra.ftgroup> <63ff875d-b985-0cbb-6ac4-bc0c84d2e774@cisco.com> <8699_1620809033_609B9549_8699_452_1_53C29892C857584299CBF5D05346208A4CD9BF4E@OPEXCAUBM43.corporate.adroot.infra.ftgroup> <ecbdb080-6af6-a2fe-811b-bf7b338e4ac6@cisco.com>
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Date: Wed, 12 May 2021 07:16:37 -0700
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To: "Gengxuesong (Geng Xuesong)" <gengxuesong@huawei.com>, Peter Psenak <ppsenak@cisco.com>, bruno.decraene@orange.com
Cc: "Van De Velde, Gunter (Nokia - BE/Antwerp)" <gunter.van_de_velde@nokia.com>, "draft-ietf-lsr-isis-srv6-extensions@ietf.org" <draft-ietf-lsr-isis-srv6-extensions@ietf.org>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, Shraddha Hegde <shraddha=40juniper.net@dmarc.ietf.org>, "lsr@ietf.org" <lsr@ietf.org>, "chopps@chopps.org" <chopps@chopps.org>
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Subject: Re: [Lsr] Last Call: <draft-ietf-lsr-isis-srv6-extensions-14.txt> (IS-IS Extension to Support Segment Routing over IPv6 Dataplane) to Proposed Standard
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Peter:


Hi!

As Xuesong suggested earlier, could you/we live with “SHOULD send”?
The mitigating circumstance (recommend vs require) is precisely the
lack of support.  I think your original reply to Gunter about how it
could be hard to mandate the Flags TLV at this point is spot on.

Thanks!

Alvaro.



On May 12, 2021 at 4:49:58 AM, Peter Psenak wrote:

> as I said, if we want to mandate the presence of the Prefix Attribute
> sub-TLV, we MUST ignore Locators without it. If we don't, then the MUST
> on the originator does not mean anything.