Testing Network Speed with Iperf3

Testing network bandwidth between servers with Iperf3.

0:00 Intro
0:27 Installation
0:59 Setting up the server
1:16 Client usage examples
6:08 Running Iperf as a daemon
7:55 Outro

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Iperf3 usage examples.

Server mode (5201 default port):
$ iperf3 -s

Change server port to 9001:
$ iperf3 -s -p 9001

Client mode:
$ iperf3 -c server02

UDP mode:
$ iperf3 -u -c server02

Adjust running time in seconds:
$ iperf3 -t 120 -c server02

Run in Revers mode (server sends, client receives):
$ iperf3 -R -c server02

Running parallel streams:
$ iperf3 -P -c server02

User Zero Copy method:
$ iperf3 -Z -c server02

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Setting up the SystemD unit file.

[Unit]
Description=iperf3 server
After=syslog.target network.target auditd.service

[Service]
ExecStart=/usr/bin/iperf3 -s

[Install]
WantedBy=multi-user.target

Copy the above into /etc/systemd/system/iperf3.service
Enable the service with $ sudo systemctl enable iperf3.service