Running iPerf3 Commands

Likely helpful to disable firewall for the iperf3 host:

systemctl stop firewalld
systemctl disable firewalld

Start the iperf server on one of your endpoints:

iperf3 -s

Run the client on the other endpoint:

iperf3 -c <ip address of server>

Example iperf command with several options specified:

iperf3 -c <ip address of server> -i 20 -udp -b 10000M

Switch	Description
-i 20	meaning, “for 20 intervals of 1 second each”
-udp	specifically use UDP protocol for this test
-b 10000M	“use bandwidth of 10,000 Mbits, or as much as possible