Virsh Network Types

Nat

<network>
  <name>nat</name>
  <uuid>77b28eff-3186-4410-adb6-2fb0b97746b9</uuid>
  <forward mode='nat'/>
  <bridge name='virbr1' stp='on' delay='0'/>
  <mac address='52:54:00:08:29:fb'/>
  <ip address='172.16.88.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='172.16.88.2' end='172.16.88.254'/>
    </dhcp>
  </ip>
</network>