Why does a non-delegated sub-domain work?

[M. Meadows]

thanks for the feedback!

 



From: sun-guru at live.com
To: bind at wingenbach.org
Subject: RE: Why does a non-delegated sub-domain work?
Date: Mon, 7 May 2012 15:44:38 -0400




Thanks for the feedback John.

 




Date: Mon, 7 May 2012 13:23:30 -0400
From: bind at wingenbach.org
To: bind-users at lists.isc.org
Subject: Re: Why does a non-delegated sub-domain work?

s6 is a subdomain of the parent domain.  Unless otherwise specified, subdomains are mastered (NS'd) by the parent (or extended parent domain) containing NS records.  As such, because you didn't put any NS records in the zone file for s6, it follows the NS records of the parent which happen to be the same name server as s6.  On the other hand, if you had attempted to master s6 on a different name server, it would not have worked.

On 05/07/2012 12:32 PM, M. Meadows wrote: 



 
So ... if we have 
 
exacttarget.com delegated to ns1 and ns2.exacttarget.com nameservers
 
and ... we manage the s6.exacttarget.com zone file from ns1 and ns2.exacttarget.com 
 
but we don't delegate s6 in the exacttarget.com zone file ... forgot to enter it in the zone file ... 
 
how is it that s6.exacttarget.com and its contents resolve properly from everywhere?
 
Seems BIND is helping us out behind the scenes somehow. Right? 
 
Confused. 
 
Thanks,
Marty

 


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