We have the Linksys E4200v2 router running DHCP on 192.168.1.x. Currently we have two Domains (One server running SBS Essentials (Domain A/ServerA) and one DC running Windows Server 2003 (Domain B/Server B)). Both Servers have Static IPs now (192.168.1.x). Eventually Domain B is going away but there is one PC in Domain B that needs access to both domains and will eventually join Domain A permanently. There is also a PC in Domain A, that needs to access to application On Server B. It was suggested to me in another forum, to isolate the two domains using a router by: "suggest to isolate it (old domain and new domain) by a router with specifying routing entries on it in order to make the clients at each domain are able to access hosts at opposite subnet " Domain A----------Router-----------Domain B How do we do that? Do we need two routers in the network, or just one? We have another e4200v2 as a spare. Thanks!