root@router:/home/vauto# tcpdump -i eth7 -n icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth7, link-type EN10MB (Ethernet), capture size 65535 bytes
11:13:57.341914 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 1, length 64
11:13:58.348266 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 2, length 64
11:13:59.356302 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 3, length 64
11:14:00.364273 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 4, length 64
11:14:01.372276 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 5, length 64
11:14:02.380252 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 6, length 64
11:14:03.388251 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 7, length 64
11:14:04.396278 IP 10.130.2.2 > 8.8.8.8: ICMP echo request, id 12099, seq 8, length 64

root@router:/home/vauto# tcpdump -i eth1
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes