We have been given the internet access (GSM wireless) via ethernet Fa0/0 on our border router and 2 subnets (each /29) for the same class C address. Our cisco router has 2 fast ethernet interfaces. My guess is 1st subnet will connect to isp (x.x.x.122 on our side and x.x.x.121 on the other as def gateway), the II fastethernet interface (Fa0/1) also has to act as def gateway (with II subnet x.x.x.129) for host of devices, hanging underneath it. Please let me know how can I provide these two def gateways on the same router? (There is no serial V.35 that the isp can provide).