$INCLUDE

[Stephens, Bill]

	This might not be too practical, it sounds like I would have to
create a CNAME for each host (currently over 10,000 records in the
production zone).  I did run into this though, according to the DNS & Bind
book:

	15.1.1 CNAMEs Attached to Interior Nodes 

	If you've ever renamed your zone 
	because of a company re-org, you may have considered creating a
single 
	CNAME record that pointed from the zone's old domain name to the new

	domain name.  For instance, if the fx.movie.edu zone were renamed to

	magic.movie.edu, we'd be tempted to create a single CNAME record to
map 
	all the old names to the new names: 

	fx.movie.edu.  IN CNAME magic.movie.edu.  

	With this in place, you'd expect 
	a lookup of empire.fx.movie.edu to result in a lookup of 
	empire.magic.movie.edu.  Unfortunately, this doesn't work - you
can't have 
	a CNAME record attached to an interior node like fx.movie.edu if it
owns 
	other records.  Remember that fx.movie.edu has an SOA record and NS 
	records, so attaching a CNAME record to it violates the rule that a
domain 
	name be either an alias or a canonical name, not both.  So, instead
of a 
	single CNAME record to rename a complete zone, you'll have to do it
the 
	old-fashioned way - a CNAME record for each individual host within
the 
	zone: 

	empire.fx.movie.edu.  IN CNAME empire.magic.movie.edu.  
	bladerunner.fx.movie.edu.  IN CNAME bladerunner.magic.movie.edu.  

	If the subdomain isn't delegated, and consequently doesn't have an
SOA 
	record and NS records attached, you can create an alias for
fx.movie.edu, 
	but it will apply only to the domain name fx.movie.edu, and not to
domain 
	names in fx.movie.edu.  

	With that in mind, as long as I didn't create an SOA record for
"dyn.bubba.pvt" and 
	delegate it, could I create the following CNAME record in the
"dyn.bubba.pvt" zone and expect
	us381s04.dyn.bubba.pvt to also resolve to us381s04.bubba.pvt?

	bubba.pvt. IN CNAME dyn.bubba.pvt.

	Thanks,

	Bill Stephens






	Joseph S D Yao <jsdy at cospo.osis.gov>
	04/24/2000 12:15 PM
	To:	Bill Stephens/Frito-Lay/US at Frito-Lay
	cc:	comp-protocols-dns-bind at moderators.isc.org@SMTP at Exchange 
	Subject:	Re: $INCLUDE

	On Mon, Apr 24, 2000 at 11:33:24AM -0500, Stephens, Bill wrote:
	> 	I'm hesitant to do that, because not all of my users would
remember
	> to typein something like us381s04.sub.bubba.pvt  as opposed to
	> us381s04.bubba.pvt.  Right now they just type in us381s04 and it
resolves
	> for them.  This is probably a stupid question but is there a way
for me to
	> put the dynamic addresses in a sub zone ie. us381s04.dyn.buba.pvt,
and have
	> it resolv the address for the user who is at us380s03.bubba.pvt
when they
	> just enter us381s04?  My understanding is that they would have to
enter the
	> fqdn.
	> 
	> 	Thanks
	> 
	> 	Bill Stephens

	Of course!  And what a good idea.  ;-)

	STATIC:

	zone.bubba.pvt:

	us380s03	IN  CNAME	us380s03.dyn

	DYNAMIC:

	zone.dyn.bubba.pvt:

	[whatever gets inserted]

	;-)

	For a large number of these, consider using $GENERATE.  See:
	<URL:
http://www.isc.org/products/BIND/docs/bind8.2_master-file.html>.

	-- 
	Joe Yao				jsdy at cospo.osis.gov - Joseph S. D.
Yao
	COSPO/OSIS Computer Support
EMT-B
	
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