I have a CISCO 2621 with two CSU/DSU T1 serial cards that I would like to connect it to an Adit-600 device that already has a router slot. I have a public ip range of 55.136.100.31 - 59 that I can use for my devices. When I configure the router with ip 131, I can ping all the way to the Adit-600 (internally), which has an ip of 55.136.100.130 but I can not ping any outside network like yahoo.com etc... When I tried to ping interface (131) from outside, I get a request time out message. However, the Adit-600 ip can be pinged from outside and that IP address is 55.136.100.130. However, if I use a crossover cable and connect it to my laptop, the 131 can be pinged.
I tried to the configuration on ethernet 0/0 as well as serial 0/0 and I can not get icmp to work.
Can someone help me out please?