I've heard different opinions on where a Server 2003 DC should point to for its preferred and alternate DNS servers in a multi-domain forest.
In my forest, I have a root domain with 4 DCs, and 4 subdomains with 2 DCs each, they are all W2K3. The majority of the DNS zones are setup as AD integrated, one is a primary, and a few are secondary. All the DCs are housed under the same roof so there are no slow connections to remote locations to deal with.
I've read that the DCs in the subdomains should point to themselves as the preferred DNS server and then to their mate as the alternate. Would the same apply to the root DCs where DC1's alternate is DC2, DC2's alternate is DC3, DC3's alternate is DC4, and DC4's alternate is DC1?
Is there any risk of the DC becoming an "island"? I read that this was only an issue with W2K and not W2K3.