IP 192.0.2.1 > 192.1.2.254: icmp 64: echo request seq 1280
IP 192.1.2.23 > 192.1.2.45: ESP(spi=0x12345678,seq=0x1): IP 192.0.2.1 > 192.0.1.1: icmp 236: echo request seq 1280 (ipip-proto-4)
IP 192.1.2.23 > 192.1.2.45: ESP(spi=0x12345678,seq=0x2): IP 192.0.2.1 > 192.0.1.1: icmp 236: echo request seq 1280 (ipip-proto-4)
IP 192.1.2.23 > 192.1.2.45: ESP(spi=0x12345678,seq=0x3): IP 192.0.2.1 > 192.0.1.1: icmp 236: echo request seq 1280 (ipip-proto-4)
IP 192.0.2.1 > 192.1.2.254: icmp 64: echo request seq 1280
