Delegating nested subdomains
Mark_Andrews at isc.org
Sat Sep 29 09:59:52 UTC 2007
> Thank you for your answer. Does this also apply all record types? I.e. is it
> still possible to assign records for a delegated subdomain, e.g.
> zone for "example.com":
> foo.example.com IN NS ns.alpha.tld.
> bar.foo.example.com IN A 18.104.22.168
> mail.bar.foo.example.com IN MX 22.214.171.124
If the namespace has been delegated then the namespace is delegated.
There is one exception and that is for glue address records.
Even then they should be returned in the addtional section of a
eferral not as answers.
> On 9/29/07, Kevin Darcy <kcd at daimlerchrysler.com> wrote:
> > Mikos Jobanx wrote:
> > > Hi,
> > > this is kind of a fundamental / theoretical question, but anyways - is
> > it
> > > legal / allowed to delegate 'subdomains of an subdomain' into different
> > > authoritative name servers, in one zone?
> > >
> > > For example in the zone file for example.com:
> > >
> > > foo.example.com IN NS ns.alpha.tld.
> > > one.foo.example.com IN NS ns.gamma.tld.
> > > host.one.foo.example.com IN NS ns.omega.tld.
> > >
> > No. Delegating a subdomain creates a "zone cut" and you -- the parent
> > zone -- can't delegate beneath it. Everything below that level of the
> > hierarchy is now in the child zone or delegated to a descendant.
> > - Kevin
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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