Test and Verify the IPSec Configuration of the Router
Enable debug output for IPSec events

Use the debug crypto ipsec EXEC and the debug crypto isakmp commands to display IPSec and ISAKMP events . The no form of these commands disables debugging output.

These commands generate a significant amount of output for every IP packet processed. They should only be used when IP traffic on the network is low, so that other activity on the router is not adversely affected.