Ethernet
iperf3 server (on Target/Host):
# ifconfig (to get the IP address)
# iperf3 -s
iperf3 client (on Host/Target):
Run a UDP test for 30 seconds:
$ iperf3 -c <IP_ADDRESS_OF_IPERF_SERVER> -u -t 30 -P 2 -b 0
Run a TCP test for 30 seconds:
$ iperf3 -c <IP_ADDRESS_OF_IPERF_SERVER> -t 30