Cisco 3640 CSU/DSU Problem

[RadioX]

I have a cisco 3640 with a 2 wan port FastEthernet module and a wict1 card in it. I have assigned the card an ip address. On my other end I have a cisco 1720 with the same card in it assigned an IP address.

SO here is an example

Cisco3640 t1 CSU/DSU
ip address 10.10.10.1/30

Cisco1720 T1 CSU/DSU
ip address 10.10.10.2/30

OK....Now I can ping the 1720 interface and I can ping the ethernet interface on the 1720 but I cannot ping my own interface in my 3640 from inside the router. I can ping it from my lan or the other router but I cannot ping it in my own router.
Any help or ideas on this would be greatly appreciated.

Thanks
Ron

 

[sharb]

First make sure there is not any access-list on the router that prevent you from pinging it. second try bouncing the interface. also what type responde do you get when you ping it? is it ...... or uuuuuu

 

[RadioX]

There are no access-lists on the router and I bounced the interface and I am getting all ..... when I ping it. Any other ideas?