root@kvm-hv6:/etc/network/if-up.d# iperf -c 172.20.0.6 -i1 -t 10
------------------------------------------------------------
Client connecting to 172.20.0.6, TCP port 5001
TCP window size:  165 KByte (default)
------------------------------------------------------------
[  3] local 172.20.0.25 port 44485 connected with 172.20.0.6 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec  81.5 MBytes   684 Mbits/sec
[  3]  1.0- 2.0 sec  81.1 MBytes   681 Mbits/sec
[  3]  2.0- 3.0 sec  81.0 MBytes   679 Mbits/sec
[  3]  3.0- 4.0 sec  81.0 MBytes   679 Mbits/sec
[  3]  4.0- 5.0 sec  80.9 MBytes   678 Mbits/sec
[  3]  5.0- 6.0 sec  84.8 MBytes   711 Mbits/sec
[  3]  6.0- 7.0 sec  89.2 MBytes   749 Mbits/sec
[  3]  7.0- 8.0 sec  89.4 MBytes   750 Mbits/sec
[  3]  8.0- 9.0 sec  90.0 MBytes   755 Mbits/sec
[  3]  9.0-10.0 sec  89.5 MBytes   751 Mbits/sec
[  3]  0.0-10.0 sec   848 MBytes   711 Mbits/sec
root@kvm-hv6:/etc/network/if-up.d# iperf -c 172.20.0.7 -i1 -t 10
------------------------------------------------------------
Client connecting to 172.20.0.7, TCP port 5001
TCP window size:  165 KByte (default)
------------------------------------------------------------
[  3] local 172.20.0.25 port 46136 connected with 172.20.0.7 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec   105 MBytes   884 Mbits/sec
[  3]  1.0- 2.0 sec   106 MBytes   889 Mbits/sec
[  3]  2.0- 3.0 sec   106 MBytes   892 Mbits/sec
[  3]  3.0- 4.0 sec   102 MBytes   854 Mbits/sec
[  3]  4.0- 5.0 sec  99.5 MBytes   835 Mbits/sec
[  3]  5.0- 6.0 sec   100 MBytes   842 Mbits/sec
[  3]  6.0- 7.0 sec   104 MBytes   870 Mbits/sec
[  3]  7.0- 8.0 sec   100 MBytes   839 Mbits/sec
[  3]  8.0- 9.0 sec   104 MBytes   868 Mbits/sec
[  3]  9.0-10.0 sec   106 MBytes   888 Mbits/sec
[  3]  0.0-10.0 sec  1.01 GBytes   866 Mbits/sec