Command
Debug IP Packet Detail
Use
This command enables detailed IP packet debugging messages. The debugging shows detailed IP information being processed by the route. , Also, you can use an access-list to limit the debug output.
Syntax
Router#debug ip packet detail
OR
Router#debug ip packet detail <access-list>
Example

In the below example we enable detailed IP packet debugging on R2.
R2(config)#do debug ip packet detail |
Here we use an access-list to filter the debug output.
R2(config)#access-list 155 permit icmp any any |