192.1.2.23.500 > 192.0.1.1.500: isakmp: 192.1.2.23.500 > 192.0.1.1.500: isakmp: 192.1.2.23.500 > 192.0.1.1.500: isakmp: 192.1.2.23.500 > 192.0.1.1.500: isakmp: 192.0.2.1 > 192.1.2.254: ICMP echo request (DF) 192.0.2.1 > 192.1.2.254: ICMP echo request (DF)