<network>
  <name>open</name>
  <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid>
  <forward mode='open'/>
  <bridge name='virbr1' stp='on' delay='0'/>
  <mac address='12:34:56:78:9a:bc'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
  </ip>
</network>