INSTALLATION

iperf is a great tool for measuring network performance. Here is how to install and use. You will need two systems with iperf installed. As root:

    sudo yum -y install iperf
    sudo firewall-cmd --permanent --add-port=5001/tcp
    sudo firewall-cmd --reload

SERVER SIDE

Invoke iperf as follows:

    iperf -s

Let this run, so if you have a terminal window open, do not close it until the test or desired tests are completed.  

CLIENT SIDE

Invoke iperf as follows:

    iperf -c hostname/ip

The test results are displayed when the test is complete.