My network consists of two sites. One main site in Chicago and Branch Office in DC. I am connecting them via private T1 line. I have two Cisco 2811 routers, one on each side of the T1. Because I have one public class C network spanning both sites, I am using bridging on both routers so there is no QoS configured. I am planning on changing IP structure in my Branch Office to 192.168.2.0 network and leaving my Main Office intact. I am introducing IP routing on the routers to get QoS for voice traffic.
My question is, how would AD Domain Controller act, when it is not on the same subnet as the rest of the Active Directory in the Main Office. This domain controller in Branch office also acts as Global Catalog Server. What do I need to do, besides changing an IP address on this domain controller to get it to talk to AD DC's in Main Office?