root@51-15-4-189:~# iperf -c 10.91.138.128
------------------------------------------------------------
Client connecting to 10.91.138.128, TCP port 5001
TCP window size:  325 KByte (default)
------------------------------------------------------------
[  3] local 10.91.170.221 port 54030 connected with 10.91.138.128 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.65 GBytes  1.41 Gbits/sec