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[DNSOP] SVCB without A/AAAA records at the service name

Martin Thomson <mt@lowentropy.net> Thu, 14 January 2021 23:43 UTC

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Date: Fri, 15 Jan 2021 10:43:17 +1100
From: Martin Thomson <mt@lowentropy.net>
To: dnsop@ietf.org
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Subject: [DNSOP] SVCB without A/AAAA records at the service name
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As requested (I'm not engaged here enough to understand the terms of engagement, so my apologies for using an interaction form I'm accustomed to), moving discussion from https://github.com/MikeBishop/dns-alt-svc/issues/287 to here:

The SVCB draft basically mandates a fallback to A/AAAA.  I think that this is not universal and that this should instead be made an option.

For HTTP, the fallback is necessary.  For a new protocol, a fallback could be undesirable.  Especially if you want to deploy that protocol using a service name on which you have already deployed HTTP.  If you don't want your HTTP servers getting connection attempts for the new protocol, the fallback is more nuisance than useful.

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