debug ICMP-Echo

debug ip packet detail” will thrash the router if it is in production.

Probably best to create an extended access-list for source/destination you are pinging.

eg;

access-list 101 permit icmp host 1.1.1.1 host 2.2.2.2

debug ip packet 101 detail

This shows detailed ICMP debugging between the 2 hosts specified in the ACL.