We currently have 2 different networks which connect at 1 main router. There are 4 off campus sites with 2 2621 routers at each coming back to 1 main router via frame relay. Currently the main router is connected to a Cisco 1005 which connects to the Internet. We want to segment the two networks so there will be a 2nd 2621 going in at main campus. The frame is being replaced by Point to Point T1's ( 4 T1 DSU's in each main campus router). The 2 F0/0 will be connected to their respective networks and F0/1we will attach to a switch along with the Internet routers E0 interface because there is only 1 ISP at this time. Can these 3 interfaces be part of the same subnet
( from a Class C, subnet 224 ) or should we just use dummy IP's?
