localhost# tcpdump -ni vr018:29:10.649668 IP 192.168.100.2 > 192.168.1.23: ICMP echo reply, id 1, seq 60, length 40
18:29:11.649353 IP 192.168.1.23 > 192.168.100.2: ICMP echo request, id 1, seq 61, length 40
18:29:11.649764 IP 192.168.100.2 > 192.168.1.23: ICMP echo reply, id 1, seq 61, length 40
18:29:12.651406 IP 192.168.1.23 > 192.168.100.2: ICMP echo request, id 1, seq 62, length 40
18:29:12.651897 IP 192.168.100.2 > 192.168.1.23: ICMP echo reply, id 1, seq 62, length 40
18:29:13.653383 IP 192.168.1.23 > 192.168.100.2: ICMP echo request, id 1, seq 63, length 40
18:29:13.653864 IP 192.168.100.2 > 192.168.1.23: ICMP echo reply, id 1, seq 63, length 40
с 192.168.100.2
localhost# tcpdump -ni vr018:34:01.448866 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 198, length 40
18:34:06.055940 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 199, length 40
18:34:11.057246 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 200, length 40
18:34:16.056441 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 201, length 40
6 packets captured
6 packets received by filter
0 packets dropped by kernel
localhost# tcpdump -ni re0
18:35:45.445667 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 202, length 40
18:35:50.054316 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 203, length 40
18:35:55.054677 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 204, length 40
18:36:00.053922 IP 192.168.100.2 > 192.168.1.23: ICMP echo request, id 1, seq 205, length 40