<interface type='bridge' name='br0'>
  <start mode='onboot'/>
  <mtu size='1500'/>
  <bridge stp='off'>
    <interface type='ethernet' name='eth0'>
      <link speed='1000' state='up'/>
      <mac address='ab:bb:cc:dd:ee:ff'/>
    </interface>
    <interface type='ethernet' name='eth1'>
    </interface>
  </bridge>
</interface>
