[QUESTION] Delegating zone

[Kevin Darcy]

Roy Arends wrote:

> On Mon, 26 Feb 2001, Paco Orozco wrote:
>
> > Hiya,
> >
> > I've got a domain, domain.com which is resolved by NS1.domain.com. I
> > want to delegate a subdomain called subdomain.domain.com. in three
> > servers NSS1.subdomain.domain.com. NSS2.domain.subdomain.com. and
> > NSS3.otherdomain.com.
> >
> > My question is: How and Where can i delegate authority to this
> > servers????
> >
> > In NS1.domain.com.:
> >
> > subdomain.domain.com.         IN      NS      NSS1.subdomain.domain.com.
> >                               IN      NS
> > NSS2.subdomain.domain.com.
> >
> > In NSS1/NSS2.subdomain.domain.com.:
> >
> > @       IN      SOA     NSS1.subdomain.com. admin. (
> >                                         2001022602
> >                                         14400
> >                                         1800
> >                                         2592000
> >                                         1800    )
> >                                 IN      NS
> > NSS1.subdomain.domain.com.
> >                                 IN      NS
> > NSS2.subdomain.domain.com.
> >                                 IN      NS      NSS3.otherdomain.com.
> >
> > Is NSS3.otherdomain.com. authoritative of subdomain.domain.com.???
>
> This is a form of lame delegation though its not so harmfull. Yes,
> nss3.otherdomain.com. will be authoritative if its configured as such. Its
> however unlikely that nss3.otherdomain.com. ever will be queried, since no
> resolver will learn from ns1.domain.com that nss3.otherdomain.com. is
> authoritative.

Hmmm... Actually, won't the in-zone NS list, which includes the
nss3.otherdomain.com NS, overlay the delegation NS list the first time a
query is made for the zone? If so, then subsequent queries will in fact use
nss3.otherdomain.com as a nameserver for subdomain.domain.com (at least as
long as that NS list is still cached, of course)...

I agree, however, that the in-zone NS'es *should* match the delegation NS'es
and _vice_versa_.


- Kevin