root@nanopi-h5-r1s:/home/freebsd # iperf3 -c 192.168.111.1
Connecting to host 192.168.111.1, port 5201
[  5] local 192.168.111.5 port 39700 connected to 192.168.111.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  7.99 MBytes  67.0 Mbits/sec    0   65.0 KBytes
[  5]   1.00-2.00   sec  7.75 MBytes  65.0 Mbits/sec    0   65.0 KBytes
[  5]   2.00-3.00   sec  8.07 MBytes  67.7 Mbits/sec    0   65.0 KBytes
[  5]   3.00-4.00   sec  7.94 MBytes  66.6 Mbits/sec    0   65.0 KBytes
[  5]   4.00-5.00   sec  8.01 MBytes  67.2 Mbits/sec    0   65.0 KBytes
[  5]   5.00-6.00   sec  7.73 MBytes  64.8 Mbits/sec    0   65.0 KBytes
[  5]   6.00-7.00   sec  7.86 MBytes  65.9 Mbits/sec    0   65.0 KBytes
[  5]   7.00-8.00   sec  7.97 MBytes  66.9 Mbits/sec    0   65.0 KBytes
[  5]   8.00-9.00   sec  8.02 MBytes  67.3 Mbits/sec    0   65.0 KBytes
[  5]   9.00-10.00  sec  7.87 MBytes  66.0 Mbits/sec    0   65.0 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  79.2 MBytes  66.5 Mbits/sec    0             sender
[  5]   0.00-10.98  sec  79.2 MBytes  60.5 Mbits/sec                  receiver

iperf Done.
root@nanopi-h5-r1s:/home/freebsd # iperf3 -c 192.168.111.1 -R
Connecting to host 192.168.111.1, port 5201
Reverse mode, remote host 192.168.111.1 is sending
[  5] local 192.168.111.5 port 51478 connected to 192.168.111.1 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  9.61 MBytes  80.7 Mbits/sec
[  5]   1.00-2.00   sec  10.1 MBytes  84.6 Mbits/sec
[  5]   2.00-3.00   sec  10.2 MBytes  85.9 Mbits/sec
[  5]   3.00-4.00   sec  10.2 MBytes  85.4 Mbits/sec
[  5]   4.00-5.00   sec  9.87 MBytes  82.8 Mbits/sec
[  5]   5.00-6.00   sec  10.0 MBytes  84.2 Mbits/sec
[  5]   6.00-7.00   sec  10.3 MBytes  86.5 Mbits/sec
[  5]   7.00-8.00   sec  10.3 MBytes  86.1 Mbits/sec
[  5]   8.00-9.00   sec  9.97 MBytes  83.6 Mbits/sec
[  5]   9.00-10.00  sec  9.99 MBytes  83.8 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.57  sec   101 MBytes  79.9 Mbits/sec  8987             sender
[  5]   0.00-10.00  sec   101 MBytes  84.4 Mbits/sec                  receiver

iperf Done.