IP 192.0.2.1 > 192.1.2.254: ICMP echo request seq 1280, length 64
IP 192.1.2.23 > 192.1.2.45: ESP(spi=0x12345678,seq=0x1), length 292: IP 192.0.2.1 > 192.0.1.1: ICMP echo request seq 1280, length 236 (ipip-proto-4)
IP 192.1.2.23 > 192.1.2.45: ESP(spi=0x12345678,seq=0x2), length 292: IP 192.0.2.1 > 192.0.1.1: ICMP echo request seq 1280, length 236 (ipip-proto-4)
IP 192.1.2.23 > 192.1.2.45: ESP(spi=0x12345678,seq=0x3), length 292: IP 192.0.2.1 > 192.0.1.1: ICMP echo request seq 1280, length 236 (ipip-proto-4)
IP 192.0.2.1 > 192.1.2.254: ICMP echo request seq 1280, length 64
