govoplan/tools/lab/libvirt/govoplan-lab-network.xml

<network>
  <name>govoplan-lab</name>
  <forward mode="nat"/>
  <bridge name="virbr-gplab" stp="on" delay="0"/>
  <domain name="lab.test" localOnly="yes"/>
  <ip address="192.168.123.1" netmask="255.255.255.0">
    <dhcp>
      <range start="192.168.123.2" end="192.168.123.99"/>
    </dhcp>
  </ip>
</network>