I have a fiber backbone spanning several buildings (Class B) and for high availability, there are routers with frame relay for fallback. To effectively use DHCP, the clients from each building must receive an IP from a specific scope (Class C) so the routers can work if the Fiber gets cut. How do I make the client draw from a specific scope on the dhcp servers? Is there a Winipcfg.exe switch that will do this? I can put it in the logon script.