TorVirt/network.xml

<network xmlns:dnsmasq='http://libvirt.org/schemas/network/dnsmasq/1.0'>
  <name>torvirt</name>
  <bridge name="torvirt0"/>
  <domain name="network"/>
  <ip address="10.2.2.1" prefix="24">
    <dhcp>
      <range start="10.2.2.2" end="10.2.2.253"/>
    </dhcp>
  </ip>
  <dnsmasq:options>
    <dnsmasq:option value="dhcp-option=option:router,10.2.2.254"/>
    <dnsmasq:option value="dhcp-option=option:dns-server,10.2.2.254"/>
  </dnsmasq:options>
  <port isolated="yes"/>
</network>