[Community-Discuss] Yet more data base problems/inconsistancies
comms at afrinic.net
Mon Nov 30 10:29:24 UTC 2020
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> On 30 Nov 2020, at 06:48, Ronald F. Guilmette <rfg at tristatelogic.com> wrote:
> In message <20201130013319.xddpolsgaynzlza6 at benm-laptop>,
> Ben Maddison <benm at workonline.africa> wrote:
>> This seems fairly clear, to me at least, that having delegations at the
>> same authoritative nameserver for a subdomain and a
>> subdomain-of-a-subdomain is problematic.
> I don't see that.
>> ns-a delegates foo.example.com to ns-b
>> and bar.foo.example.com to ns-c
>> ns-b delegates bar.foo.example.com to ns-d
>> Who is authoritative for host.bar.foo.example.com?
> My understanding is that the delegation of DNS authority works a lot
> like routing, i.e. in any case where two or more DNS authority delegations
> -could- theoretically be applicable, the most specific DNS delegation wins.
> Of course, if there are ties, where each of two or more delegations are
> equally specific, then that's problematic. But I don't think we are
> discussing such cases at the moment.
> I freely admit that I may perhaps not be on entirely solid ground when
> it comes to this "most specific wins" rule, but I do believe that's how
> DNS works. If I am wrong about that, I will be happy to be corrected.
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