Recently i needed to test the network troughput between my file server and one of the file server clients.

I came across iperf, its a client-server command line utility that sends data between the server ( one of the machines of the pair you want to test ) and the client ( the other machine of the pair )

The usage is pretty simple, in one of the machines ( that will work as server ):

iperf -s -p 65000

On the other machine ( the client ):

iperf -c <ip of the server> -p 65000

After a few seconds:

[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.1 sec  8.88 MBytes  7.34 Mbits/sec