Conditional forwarders do what you want.

Thanks,
Brian Desmond
[email protected]

c - 312.731.3132

From: Sean Martin [mailto:[email protected]]
Sent: Tuesday, May 05, 2009 12:34 PM
To: NT System Admin Issues
Subject: Windows 2003 DNS

Good morning,

I'm assisting my Network Services team with the implementation of Cisco's 
Global Site Selector. Part of the implementation plan includes the 
re-configuration of some of our domains ( to be handled by the site selector) 
on our Windows 2003 DNS servers (external DNS, not AD integrated) so that the 
global site selector will respond with name resolution.

The GSS has been configured with all of the appropriate A records to respond to 
queries. I've tested what I thought was a workable solution by simply changing 
the NS records for one of the domains to the GSS. However, our DNS servers 
don't appear to be passing queries to the GSS. The only records that exist 
within the zone are the NS record and the SOA. I've tried changing the SOA to 
the GSS, as well as leaving the SOA blank.

Apparently, we didn't purchase the ability for the GSS to act as a DNS server 
itself, it's only purpose is to provide name resolution, at which point it will 
query the load balancers at each site and respond with the VIP from the least 
loaded site.

Does anyone know of a method within Windows 2003 DNS to basically pass all 
queries for a specific domain to an alternate name server?

- Sean





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