on machine1 (host, this one will receive)
iperf -s -p 65000
on machine2 (client, this one will upload)
iperf -c [ip of server] -p 65000
Reverse the machines to test the other way (upload->download or vice versa).
Random Tech Cookbook
iperf -s -p 65000
iperf -c [ip of server] -p 65000
Main stream: rtsp://192.168.1.10:554/user=admin&password=&channel=1&stream=0.sdp?real_stream--rtp-caching=100
Secondary (low quality) stream: rtsp://192.168.1.10:554/user=admin&password=&channel=1&stream=1.sdp?real_stream--rtp-caching=100