If i'm understanding your scenario correctly the following should take care of it....interface fa0/1ip address 10.0.0.2 255.255.255.0 interface fa0/0ip address 172.16.0.1 255.255.255.0no shutip route 0.0.0.0 0.0.0.0 10.0.0.1 You will also need a rout...