access-list 101 permit ip host 192.168.0.1 host 192.168.0.2
access-list 101 permit ip host 192.168.0.2 host 192.168.0.1
Now reuse the earlier debug with the access-list.
Router#debug ip packet detail 101
If you tweak your logging settings just right you should be able to capture the packet detail to syslog or to the console in real time giving you insight into the specific traffic you might be looking for.