Router_A#debug ip packet
IP packet debugging is on
Router_A#
IP: s=172.16.2.2 (Serial0), d=255.255.255.255, len 56, rcvd 2
IP: s=172.16.1.1 (local), d=255.255.255.255 (Ethernet0), len 62, sending broad/multicast
IP: s=172.16.2.1 (local), d=255.255.255.255 (Serial0), len 86, sending broad/multicast
IP: s=172.16.2.2 (Serial0), d=255.255.255.255, len 56, rcvd 2
IP: s=172.16.1.1 (local), d=255.255.255.255 (Ethernet0), len 62, sending broad/multicast
IP: s=172.16.2.1 (local), d=255.255.255.255 (Serial0), len 86, sending broad/multicast
IP: s=172.16.2.2 (Serial0), d=255.255.255.255, len 56, rcvd 2
IP: s=172.16.1.1 (local), d=255.255.255.255 (Ethernet0), len 62, sending broad/multicast
IP: s=172.16.2.1 (local), d=255.255.255.255 (Serial0), len 86, sending broad/multicast
IP: s=172.16.2.2 (Serial0), d=255.255.255.255, len 56, rcvd 2
IP: s=172.16.1.1 (local), d=255.255.255.255 (Ethernet0), len 16, sending broad/multicast
IP: s=172.16.2.1 (local), d=255.255.255.255 (Serial0), len 86, sending broad/multicast
IP: s=172.16.1.1 (local), d=255.255.255.255 (Ethernet0), len 238, sending broad/multicast
IP: s=172.16.2.1 (local), d=255.255.255.255 (Serial0), len 86, sending broad/multicast
IP: s=172.16.2.2 (Serial0), d=255.255.255.255, len 56, rcvd 2
IP: s=172.16.2.2 (Serial0), d=255.255.255.255, len 56, rcvd 2
IP: s=172.16.1.1 (local), d=255.255.255.255 (Ethernet0), len 16, sending broad/multicast
IP: s=172.16.2.1 (local), d=255.255.255.255 (Serial0), len 86, sending broad/multicast