Andy,
   The existence of 8.f.0.f.1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa as an 
authoritative zone on the server has higher relevance than the delegation 
inside another zone.  The answer comes from the authoritative zone, no need to 
follow the delegation.

Don Friesen

-----Original Message-----
From: bind-users <[email protected]> On Behalf Of Andy Smith
Sent: Tuesday, February 13, 2024 6:46 AM
To: [email protected]
Subject: Re: Answers from subzone even when superzone has a delegation elsewhere

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Hi Don,

Yes.

If you want actual names to look at, these zones are both present on the same 
servers:

        1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa 
8.f.0.f.1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa

However, the presence of 8.f.0.f.1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa is a mistake 
and in the mean time someone has changed the delegation inside 
1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa to be:

8.f.0.f NS      ns-auto.bitfolk.com.

A query for, say:

2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.f.0.f.1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa. IN PTR

is answered NXDOMAIN because it does not exist inside the 
8.f.0.f.1.f.1.0.8.a.b.0.1.0.0.2.ip6.arpa zone file, instead of following that 
delegation to ns-auto.bitfolk.com.

Thanks,
Andy

On Tue, Feb 13, 2024 at 02:31:32PM +0000, Friesen, Don CITZ:EX via bind-users 
wrote:
> Andy,  You do also have the A record glue for elsewhere.example.com in the 
> example.com zone, right?  Just checking.
>
> Don Friesen
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