I've set up a lab with 2 2501s connected via dte/dce serial connection. One side of the "WAN" is on the 10.10.10.0, the other is on a 192.168.0.0 network. From the 10 network I can ping S0 and E0 on the 192 side. Also, I can ping the default gateway on the 192 (a Cisco broadband gateway). I cannot, however, ping any workstations on the 192 network from the 10. This must be something simple but I just am not seeing it.