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Re: [Idr] WG adoption call for draft-abraitis-bgp-version-capability-08, to end September 25

Jeffrey Haas <jhaas@pfrc.org> Thu, 12 January 2023 18:43 UTC

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From: Jeffrey Haas <jhaas@pfrc.org>
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Date: Thu, 12 Jan 2023 13:43:17 -0500
Cc: Robert Raszuk <robert@raszuk.net>, Donatas Abraitis <donatas.abraitis@hostinger.com>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>, Alvaro Retana <aretana.ietf@gmail.com>, Bruno Decraene <bruno.decraene@orange.com>, IDR List <idr@ietf.org>
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To: John Scudder <jgs@juniper.net>
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Subject: Re: [Idr] WG adoption call for draft-abraitis-bgp-version-capability-08, to end September 25
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John,


> On Jan 12, 2023, at 1:24 PM, John Scudder <jgs@juniper.net> wrote:
> 
> FWIW, as far as I know, the behavior permitted by the paragraph you quote has never been used. If that’s true, it might not be a bad idea to do an update of RFC 5492 that removes the paragraph and deprecates the Unsupported Capability error code entirely, to avoid future generations going through the same confusion. If the WG wants to do this, I’d be willing to participate, although the first step would be to do a survey to make sure nobody actually is making use of the feature and I’d want someone else to lead on that.

The example cited, "I really want ipv6", is a good motivation for "negotiate this, or hang up".  I don't think we'll ever want it gone from the spec.

There's perhaps room for grow to tell us "don't do this for reasonable combinations of operationally used knobs".

-- Jeff

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