monkeynet.xml

<network>
  <name>monkeynet</name>
  <forward mode='nat'/>
  <bridge name='virbr1' stp='off' delay='0'/>
  <ip address='172.20.0.1' netmask='255.255.0.0'>
    <dhcp>
      <range start='172.20.0.50' end='172.20.0.254'/>
    </dhcp>
  </ip>
</network>