netboot-network.xml

<network>
  <name>netboot</name>
  <uuid>81ff0d90-c91e-6742-64da-4a736edb9a9b</uuid>
  <forward mode='nat'/>
  <bridge name='virbr1' stp='off' delay='1' />
  <domain name='example.com'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <tftp root='/var/lib/tftproot' />
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254' />
      <bootp file='pxeboot.img' />
    </dhcp>
  </ip>
</network>