function convertUnknownToUnknownNetwork($ID)
 {
     global $DB;
     $np = new Netport();
     $this->getFromDB($ID);
     // Get port
     $a_ports = $np->find('on_device=' . $ID . ' AND device_type="' . PLUGIN_FUSIONINVENTORY_MAC_UNKNOWN . '"');
     if (count($a_ports) == '1') {
         // Put mac and ip to unknown
         $port = current($a_ports);
         $this->fields['ifaddr'] = $port['ifaddr'];
         $this->fields['ifmac'] = $port['ifmac'];
         $this->update($this->fields);
         $np->deleteFromDB($port['ID']);
         return true;
     }
     return false;
 }