iperf3

Start a server

iperf3 -s

Basic test as client

iperf3 -c example.com

Use multiple threads

iperf3 -c example.com -P 4

Test download speed

iperf3 -c example.com -R

Test UDP (unlimited)

• by default iperf3 limit speed to 1M, use -b to change

iperf3 -c example.com -u -b 1000m

Test continuously

iperf3 -c example.com -t 0