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I'm currently running at about 10mbps and I was wondering if you fine people out there had any clever ways to speed that up. Thanks!

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Can you share more about your configuration? How many VM's? Are they using the internal network or NAT or are they bound to a Physical NIC? How are you measuring speed? – Sean Earp Mar 22 '11 at 3:47
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Check your virtual NIC.

The default NIC in VirtualBox is the AM79C970A, which according to its datasheet, is a 10Mbit card. Although this is a 'virtual' NIC, it's probably causing the problems. You can try to change the NIC to something else like the virtio or AM79C973 or better.

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