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Re: [DNSOP] I-D Action: draft-ietf-dnsop-glue-is-not-optional-02.txt

Shumon Huque <shuque@gmail.com> Wed, 28 July 2021 00:41 UTC

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From: Shumon Huque <shuque@gmail.com>
Date: Tue, 27 Jul 2021 20:40:41 -0400
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To: John R Levine <johnl@taugh.com>
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Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-glue-is-not-optional-02.txt
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On Tue, Jul 27, 2021 at 8:32 PM John R Levine <johnl@taugh.com> wrote:

> >> We say that authoritative servers MUST return all the glue, which is
> true
> >> for real glue, but not true for sibling glue (unless the sibling is in
> >> a loop which is not something to encourage.)  Let's not confuse people,
> please.
> >
> > Just to make sure we're talking about the same thing, the definition of
> > sibling glue is glue from another zone delegated from the same parent.
>
> That's not what the example in 4.1 of the draft shows.  It has foo.test
> depending on ns1.bar.test, so the server adds the A record for
> ns1.bar.test.
>

It does actually.

foo.test and bar.test share the same parent zone (test).

Glue is returned in referrals from the parent zone. So this exactly matches
the definition I mentioned above.

"ns1.bar.test/A" is glue for "bar.test" (and sibling glue for "foo.test" in
that
example). It is returned by the servers for "test" in a referral for
"foo.test".

Open to suggestions for more clarifying language.

Shumon.

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