Iperf
PC1 (server)
iperf3 -s
Take note of the port the server is listening on
PC2 (client)
iperf3 -c <IP-PC1> -p <PORT>
-i 1 (interval)
-t 30 (time in sec to transmit)
-P 5 (parallel)
-R (reverse communication>
Info
The text in parantheses are remarks!