How do people do their own RDNS without a full class C ?

[Mark_Andrews at isc.org]

> 
> > The CNAME method that has been described seems to work but suffers from
> > timeout problems as it's got to do 2 lookups but doesn't seem to increase
> > the time.
> 
> In RFC2317, it is recommended that "the authoritative name servers for
> the delegating zone (the zone containing all the CNAME records) all run
> as slave (secondary) name servers for the "child" zones delegated and
> pointed into via the CNAME records."
> 
> Having the parent server be a slave for the child zones allows the 
> parent server to return all of the DNS information without requiring
> recursion.  I believe that the recursion needed, if the parent server
> isn't a slave to the child (as a parent with a ten year old son, these
> words sound horrible!), is what is causing the timeouts.  Once the
> child zone information is cached after querying both the parent and
> child, then there aren't any timeouts.
> 
> Bill Larson (wllarso at swcp.com)

	In addition to that the nameservers for the client organisation
	usually should also be servers for the parent zone (though often
	they are stealth servers) as this allows local resolution to
	work when the link to the outside is down.

	Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org