Are the routers the IPSec peers, meaning that each router is the IPSec termination point? If not, that is the end hosts themselves are processing IPSec traffic then one quick way to validate IPSec flowing is this:
On each router's T1 interface (I assume this a point-to-point connection) create an acl as follows:
ip access-list extended verify_ipsec permit udp any eq 500 any eq 500
ip access-list extended verify_ipsec permit esp any any
ip access-list extended verify_ipsec permit ah any any
ip access-list extended verify_ipsec permit ip any any
then apply the access-list on the T1 interface. Note that the acl permits all traffic, but you can do a show ip access-list periodically and you should see non-zero hit counts for 2 of the 1st 3 lines and maybe the 4th (unless all traffic is ipsec and the routers do not exchange route info between them). You may or may not see AH traffic depending upon whether the end hosts use AH.
If the routers are the IPSec peers then have you tried these commands?
show crypto map
show crypto isa sa
show crypto ipsec sa
Let me know if this helps.
