micrOdOts.org / ramblings [of the ABsurd]

This is a known problem.
The solution is to disable the offloading features in your host NIC.

The following instructions are for Linux hosts, however,
they similarly apply to Windows or other hosts.

First, make sure you are using the right and newest driver
for your network interface. Check out the chipset manufacturer's
page; they may provide drivers not included with your linux
distribution.

If eth0 is the bridged interface,
run the following command:

ethtool -K eth0 sg off rx off tx off tso off

You better put this into your /etc/rc.d/rc.local file,
so it executes every time you boot.