First make sure, that both subnets are fully routable (using routes or Layer
3 switch), and then install each DC in its own subnet. DNS will handle name
resolution. If you are going to support down-level clients (Win9x/Me/NT),
then install WINS server for network browsing to function properly.
If those subnets are connected with WAN, then you would have to create two
sites (in AD sites and services) and associate each site with its own subnet
object. Place each DC in its site and setup replication
If this is on the same LAN, then leave both DC in the same site. That is
more or less it.
--
Regards
Matjaz Ladava, MCSE, MCSA, MCT, MVP
Microsoft MVP - Active Directory
(e-mail address removed), (e-mail address removed)
http://ladava.com