Problem forwarding traffic through two cisco routers

[scottie4442]

OK, let me explain my setup first, I have a room at the school where I teach that is setup for students to work on an enterprise type network. The setup is this, there are 4 areas, each has a cisco 1720. These are connected to a central server, through ethernet, that runs a program called lanforge (a WAN simulator). Then on the other side of the server it connects through a cisco 2621 router to a linux server which is connected, through a second interface, to the campus network and, eventually, the internet.

Ok, all that to ask this question. The 1720's all can ping between each other and the hosts that are connected behind them, in other words I can ping anywhere in any of the areas connected with the 1720's. I can also ping the 1621 from anywhere in the room, but I cannot ping through the 1621 to anything beyond it. I also cannot ping from the 1621 through the 1720's to any of their workstations. I think it is something I am not setting up in the 1621 but I am not sure what. Ok the question is can someone tell me what else I need to check or what configurations I need to check to make workstations in the room be able to ping through the 1720 to the 1621 and on out to the internet. BTW it is not an issue with lanforge, that at least is working correctly.

 

[KiscoKid]

A topology diagram, running configs and routing tables would be useful I think. Typically though this is usually down to access lists or a routing issue.

 

[castlesmadeofsand]

sh int,sh ip rou and sh access-list on any 1720, as well as on the 2621, and post the results please.

Tim

 

[scottie4442]

Ok, fixed it. There was an access-list entry that I did not know about, I did not wipe the nvram when I put the 2621 in place. When I went in and cleared out ALL the access-list information and all tie-in on each interface it works like a charm now. Thanks for the help