: bart.cs.columbia.edu ;iperf -u -c 140.109.17.180 -p 5000 -S 0x06
------------------------------------------------------------
Client connecting to 140.109.17.180, UDP port 5000
Sending 1470 byte datagrams
UDP buffer size: 8.00 KByte (default)
------------------------------------------------------------
[  3] local 128.59.19.191 port 61644 connected with 140.109.17.180 port 5000
write failed: Connection refused
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 0.2 sec  27.3 KBytes  1.04 Mbits/sec
read failed: Connection refused
: bart.cs.columbia.edu ;

//-----------------------------------------------------------------------------------


[columbia4@planetlab1 bin]$ ./plabdump udp port 5000
04:55:43.728004 bart.cs.columbia.edu.61644 > planetlab1.iis.sinica.edu.tw.5000:
udp 1470 (DF) [tos 0x6,ECT(0)]