Re: [DNSOP] I-D Action: draft-ietf-dnsop-svcb-https-01.txt

[Erik Nygren <[e-mail]>]

Would this be better as a SHOULD NOT?  Or just better to remove this,
or replace with non-normative txt?
Opened: https://github.com/MikeBishop/dns-alt-svc/issues/221

On Mon, Jul 13, 2020 at 8:03 PM Mark Andrews <[e-mail]> wrote:

> Section 2.4.1.  AliasMode paragraph 2.  Why have "MUST NOT" here?
>
>
>    The primary purpose of AliasMode is to allow aliasing at the zone
>    apex, where CNAME is not allowed.  In AliasMode, TargetName MUST be
>    the name of a domain that has SVCB, AAAA, or A records.  It MUST NOT
>    be equal to the owner name, as this would cause a loop.
>
> Nameservers and clients need to detect loops regardless of the number of
> records that form the loop.  All this does is force vendors to write
> additional
> code to detect this one sub-case of a loop.  These are also the only RR
> types
> that need to have their owner names available to parse them.
>
> Mark
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
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>
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