[root@lindsay /etc]# tcpdump -nn
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on fxp0, link-type EN10MB (Ethernet), capture size 96 bytes
22:20:05.890155 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:05.968317 IP 75.8.100.30.48354 > 192.168.1.19.81: S 2715131901:2715131901(0) win 5840 <mss 1408,sackOK,timestamp 254086950 0,nop,wscale 5>
22:20:07.890735 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:08.973894 IP 75.8.100.30.48354 > 192.168.1.19.81: S 2715131901:2715131901(0) win 5840 <mss 1408,sackOK,timestamp 254087700 0,nop,wscale 5>
22:20:09.891255 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:10.961383 arp who-has 192.168.1.19 tell 192.168.1.1
22:20:10.961416 arp reply 192.168.1.19 is-at 00:02:b3:e6:95:5b
22:20:11.862843 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 276
22:20:11.863820 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 271
22:20:11.864908 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 348
22:20:11.866028 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 340
22:20:11.867189 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 271
22:20:11.868258 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 324
22:20:11.869392 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 356
22:20:11.870558 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 271
22:20:11.871690 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 344
22:20:11.872831 IP 192.168.1.1.1900 > 239.255.255.250.1900: UDP, length 338
22:20:11.891810 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:13.892286 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:14.967515 IP 75.8.100.30.48354 > 192.168.1.19.81: S 2715131901:2715131901(0) win 5840 <mss 1408,sackOK,timestamp 254089200 0,nop,wscale 5>
22:20:15.892806 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:17.893264 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:19.893766 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:21.894227 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:23.894770 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:25.895244 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:26.968583 IP 75.8.100.30.48354 > 192.168.1.19.81: S 2715131901:2715131901(0) win 5840 <mss 1408,sackOK,timestamp 254092200 0,nop,wscale 5>
22:20:27.895801 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:29.896293 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:31.896822 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0 
22:20:33.897330 802.1d config 8000.00:13:10:18:c7:d4.8001 root 8000.00:13:10:18:c7:d4 pathcost 0 age 0 max 20 hello 2 fdelay 0