[vbox-dev] bridged network between VMs on same host is very slow

Aleksey Ilyushin aleksey.ilyushin at oracle.com
Fri Jun 24 16:21:34 GMT 2011

>>> Data transfer between VMs on the same host is very, very slow ~16KB/s.
> I am finding slowness with Windows guest to Linux Host and also general slowness
> on network access from client pc to any guest.
There is a performance issue with Windows guests since they tend to use smaller packets with segmentation offloading. They will always be slower than Linux guests but we are working on narrowing the gap.
> Speeds were terrible using a Realtek PCI card 8169, something like 4.25mbts but
> perhaps a hardware incompatibility.
What are the offloading settings for the card (sudo ethtool -k <interface>)? 

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