Something

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
17:32:48.721118 IP 202.5.145.57.3771 > 192.168.129.9.http: S 1156287836:1156287836(0) win 65535 <mss 1460,nop,nop,sackOK>
17:32:51.613933 IP 202.5.145.57.3771 > 192.168.129.9.http: S 1156287836:1156287836(0) win 65535 <mss 1460,nop,nop,sackOK>
17:32:53.720688 arp who-has 192.168.129.9 tell 192.168.129.253
17:32:53.724617 arp reply 192.168.129.9 is-at 00:30:4f:42:72:a4
17:32:55.934646 IP 192.168.129.9.2055 > 239.255.255.250.1900: UDP, length 287
17:32:55.938464 IP 192.168.129.9.2055 > 239.255.255.250.1900: UDP, length 287
17:32:55.943051 IP 192.168.129.9.2055 > 239.255.255.250.1900: UDP, length 298
17:32:55.946617 IP 192.168.129.9.2055 > 239.255.255.250.1900: UDP, length 298
17:32:55.951126 IP 192.168.129.9.2055 > 239.255.255.250.1900: UDP, length 343
17:32:55.954803 IP 192.168.129.9.2055 > 239.255.255.250.1900: UDP, length 343
17:32:57.632171 IP 202.5.145.57.3771 > 192.168.129.9.http: S 1156287836:1156287836(0) win 65535 <mss 1460,nop,nop,sackOK>