2 identical virtual machines (with IP 192.168.0.232 and 192.168.0.231) with Debian 8 in hypervisor ESXi 5.5u2. Virtual network adapter - vmxnet3 (vmware-tools 9.4.0.27746 build-1399439) connected
to one virtual network commutator.
Test network speed with iperf with one Windows 8.1 (192.168.0.3) - so slow with linux 192.168.0.232
Client connecting to 192.168.0.232, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.3 port 49242 connected with 192.168.0.232 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 13.5 MBytes 11.3 Mbits/sec
F:\Downloads\iperf-2.0.5-3-win32>iperf -c 192.168.0.231
------------------------------------------------------------
Client connecting to 192.168.0.231, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.3 port 49243 connected with 192.168.0.231 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 813 MBytes 682 Mbits/sec
From Linux 192.168.0.232
$ iperf -c 192.168.0.3
------------------------------------------------------------
Client connecting to 192.168.0.3, TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.232 port 33227 connected with 192.168.0.3 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.2 sec 423 MBytes 347 Mbits/sec
From Linux 192.168.0.231
iperf -c 192.168.0.3
------------------------------------------------------------
Client connecting to 192.168.0.3, TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.231 port 35334 connected with 192.168.0.3 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 861 MBytes 722 Mbits/sec
With Linux 192.168.0.231 192.168.0.232
$ iperf -c 192.168.0.232
------------------------------------------------------------
Client connecting to 192.168.0.232, TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.231 port 34759 connected with 192.168.0.232 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 18.7 GBytes 16.1 Gbits/sec
For testing deploy virtaul machine with Windows 8.1 (192.168.0.4), connected with some virtual commutator.
C:\Users\user>C:\iperf\iperf.exe -c 192.168.0.232
------------------------------------------------------------
Client connecting to 192.168.0.232, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.4 port 49387 connected with 192.168.0.232 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 3.67 GBytes 3.15 Gbits/sec
C:\Users\user>C:\iperf\iperf.exe -c 192.168.0.231
------------------------------------------------------------
Client connecting to 192.168.0.231, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.4 port 49388 connected with 192.168.0.231 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 3.37 GBytes 2.90 Gbits/sec
Between Windows all is fine
F:\Downloads\iperf-2.0.5-3-win32>iperf -c 192.168.0.4
------------------------------------------------------------
Client connecting to 192.168.0.4, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.3 port 57614 connected with 192.168.0.4 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 754 MBytes 633 Mbits/sec
Where may be a problem ?
- Edited by Michail Safronov 1 hour 55 minutes ago