root@lb-lan:~/gred# iperf3 -c 192.168.168.1 -t 15 -R && sleep 5 && iperf3 -c 192.168.168.1 -t 15
Connecting to host 192.168.168.1, port 5201
Reverse mode, remote host 192.168.168.1 is sending
[  4] local 192.168.168.2 port 39068 connected to 192.168.168.1 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  20.0 MBytes   168 Mbits/sec
[  4]   1.00-2.00   sec  19.6 MBytes   164 Mbits/sec
[  4]   2.00-3.00   sec  19.6 MBytes   164 Mbits/sec
[  4]   3.00-4.00   sec  18.7 MBytes   157 Mbits/sec
[  4]   4.00-5.00   sec  19.3 MBytes   161 Mbits/sec
[  4]   5.00-6.00   sec  19.6 MBytes   164 Mbits/sec
[  4]   6.00-7.00   sec  19.5 MBytes   164 Mbits/sec
[  4]   7.00-8.00   sec  19.6 MBytes   164 Mbits/sec
[  4]   8.00-9.00   sec  19.6 MBytes   164 Mbits/sec
[  4]   9.00-10.00  sec  18.2 MBytes   153 Mbits/sec
[  4]  10.00-11.00  sec  19.6 MBytes   164 Mbits/sec
[  4]  11.00-12.00  sec  19.6 MBytes   164 Mbits/sec
[  4]  12.00-13.00  sec  19.6 MBytes   164 Mbits/sec
[  4]  13.00-14.00  sec  19.6 MBytes   164 Mbits/sec
[  4]  14.00-15.00  sec  17.9 MBytes   150 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-15.00  sec   291 MBytes   163 Mbits/sec   86             sender
[  4]   0.00-15.00  sec   290 MBytes   162 Mbits/sec                  receiver
iperf Done.

Connecting to host 192.168.168.1, port 5201
[  4] local 192.168.168.2 port 39071 connected to 192.168.168.1 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec   309 KBytes  2.53 Mbits/sec   55   4.17 KBytes
[  4]   1.00-2.00   sec   199 KBytes  1.63 Mbits/sec   22   2.78 KBytes
[  4]   2.00-3.00   sec   186 KBytes  1.53 Mbits/sec   37   4.17 KBytes
[  4]   3.00-4.00   sec   264 KBytes  2.16 Mbits/sec   49   2.78 KBytes
[  4]   4.00-5.00   sec   234 KBytes  1.91 Mbits/sec   40   4.17 KBytes
[  4]   5.00-6.00   sec   289 KBytes  2.37 Mbits/sec   45   2.78 KBytes
[  4]   6.00-7.00   sec   256 KBytes  2.10 Mbits/sec   38   2.78 KBytes
[  4]   7.00-8.00   sec   211 KBytes  1.73 Mbits/sec   37   4.17 KBytes
[  4]   8.00-9.00   sec   200 KBytes  1.64 Mbits/sec   41   4.17 KBytes
[  4]   9.00-10.00  sec   231 KBytes  1.89 Mbits/sec   42   2.78 KBytes
[  4]  10.00-11.00  sec   234 KBytes  1.91 Mbits/sec   50   4.17 KBytes
[  4]  11.00-12.00  sec   253 KBytes  2.07 Mbits/sec   51   2.78 KBytes
[  4]  12.00-13.00  sec   214 KBytes  1.75 Mbits/sec   41   4.17 KBytes
[  4]  13.00-14.00  sec   186 KBytes  1.53 Mbits/sec   41   4.17 KBytes
[  4]  14.00-15.00  sec   295 KBytes  2.42 Mbits/sec   48   4.17 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-15.00  sec  3.48 MBytes  1.94 Mbits/sec  637             sender
[  4]   0.00-15.00  sec  3.41 MBytes  1.91 Mbits/sec                  receiver

iperf Done.