Very Slow File Transfer Speed Between Windows 2008 Guest VMs Running On The Same Oracle VM Server (Doc ID 2391767.1)

Last updated on MARCH 29, 2022

Applies to:

Symptoms

Very slow file transfer speed between Windows 2008 guest VMs running on same Oracle VM Server.

The iperf test result is as follows.

WinA as client and WinB as Server
=================================
C:\Users\Administrator\Desktop>iperf3.exe -c <IP of winB>
Connecting to host <IP ADDR>, port 5201
[ 4] local <IP ADDR> port 49163 connected to <IP ADDR> port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.01 sec 53.6 MBytes 444 Mbits/sec
[ 4] 1.01-2.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 2.01-3.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 3.01-4.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 4.01-5.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 5.01-6.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 6.01-7.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 7.00-8.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 9.00-10.02 sec 0.00 Bytes 0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.02 sec 53.6 MBytes 44.9 Mbits/sec sender
[ 4] 0.00-10.02 sec 53.4 MBytes 44.7 Mbits/sec receiver

iperf Done.

Changes

Changing default values of properties in Oracle VM Virtual Ethernet Adapter.

Cause

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