We have a PC with 178.168.x.x address and subnet connected to an ext CSU. The CSU is hooked to Router via T1 serial connection. Router & CSU can ping each others IP address (188.8.131.52 & 184.108.40.206). PC can Ping CSU ip address. The question is that PC can't seem ping any of the inside EIGRP ip addresses. What Can be done so that PC can ping the network?