To:
dnsop@cafax.se
From:
Bruce Campbell <bruce.campbell@ripe.net>
Date:
Tue, 8 Apr 2003 12:08:34 +0200 (CEST)
In-Reply-To:
<02a601c2fda6$00865fc0$7207e29f@cnniczh>
Sender:
owner-dnsop@cafax.se
Subject:
Re: Are there any ipv6 root servers?
On Tue, 8 Apr 2003, zhang hong wrote:
> I have another question.
>
> Some gTLDs and ccTLDs have IPv6 DNS now. While current root zone
> doesn't contain IPv6 referral (glue for 'AAAA') for these TLD name servers.
>
> Does this mean TLD IPv6 servers will not be asked in current DNS resolution,
> until their IPv6 addresses are added in root zone file?
Its the caching issue again.
For example, although 'ns.ripe.net' has a AAAA record only available in
the 'ripe.net' zone, it doesn't get asked over v6 by 'virgin' caches as
the result of a TLD delegation from the root.
However, if the resolver cache has cached the AAAA for 'ns.ripe.net' as a
result of querying a nameserver for 'ripe.net' for something else, then
they do direct further queries over v6 (if they have v6 connectivity of
course), as borne out by looking at the queries received by ns.ripe.net.
Kind regards,
--
Bruce Campbell RIPE
Systems/Network Engineer NCC
www.ripe.net - PGP562C8B1B Operations/Security
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