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[Xen-users] Network performance in virtual machine (good upload speed, bad download)

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Martin Nilsson <martin@xxxxxx>
  • Date: Sun, 27 Nov 2005 21:42:08 +0100
  • Delivery-date: Sun, 27 Nov 2005 20:41:33 +0000
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

I have just installed Xen and got a virtual machine up and running. Everything seems to work fine, except that I get strange network performance in the virtual machine. When I upload data, I get good speeds, around 6-7 MB/s which I think is ok on a 100 Mbit network. When I download however, I only get ~300 KB/s. On the host machine I get good speed in both direction. The version of Xen is 2.0.7, and I have tried both the binary release and built my own kernel, with the same results. The host OS is debian sarge. I really have no idea where to look for a solution, so every advice I can get is highly appreciated.

Best regards,

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