howto resolve 10.in-addr.arpa

[A. Schulze]

W.C.A. Wijngaards via Unbound-users:

> My guess is both do not work and the TTL is different.
not impossible ...

> Normally, unbound should try both addresses, and I guess it is  
> trying them but
> the other also does not work.  unbound-control lookup can be used to
> get the info on those two IP addresses, like ping time.  Or maybe you
> can dig @10.0.1.53 and see if it responds.
>
> Otherwise, this is a bug of some sort, unbound should be trying all
> available name servers for your query.

I tried to reproduce the error condition with only one nameserver.
No Error  :-/
I'll have to setup a second nameserver I could switch off on demand.
more observation if that's done...

> The local-zone config did not seem to be the problem.
was my guess about transparent vs. nodefault right?

Thanks