MrZebra (zebrataur) wrote,
MrZebra
zebrataur

FIXED - Windows 7 - XP Mode virtual machine very slow network transfer

I use Windows 7's XP mode virtual machine as part of my work.  I recently made some changes to its network configuration and found that file transfers between the virtual machine and the host became incredibly slow - 30kbps or so.  I use a normal network share / mapped network drive to transfer files between the two.

In the VM's network settings, I have only one card - the host machine's network adaptor.

The fix took some googling to find but turned out to be very easy - disable "large send offload" for the network card:

1) On the host machine, go Control Panel -> Network and Internet -> Network and Sharing Center -> Change Adapter Settings.
2) Right-click the network card and choose "Properties"
3) Click "Configure"
4) Click on the "Advanced" tab
5) Click on "Large Send Offload" (IPv4 & IPv6) and set the value to "Disabled"

That solved the problem for me - the speed went from about 30kbps to 20Mbps.  Hope this information can help someone else.
Tags: computer
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