192.1.2.23 > 192.1.2.45: ICMP echo request (DF)
192.1.2.45 > 192.1.2.23: ICMP echo reply (DF)
192.1.2.23 > 192.1.2.45: ICMP echo request (DF)
192.1.2.45 > 192.1.2.23: ICMP echo reply (DF)