'Gets the IP addresses of operational LIFs on the vserver.'

def get_operational_lif_addresses(self):

    net_interface_get_iter_args = {'query': {'net-interface-info': {'operational-status': 'up'}}, 'desired-attributes': {'net-interface-info': {'address': None}}}
    result = self.send_iter_request('net-interface-get-iter', net_interface_get_iter_args)
    lif_info_list = (result.get_child_by_name('attributes-list') or netapp_api.NaElement('none'))
    return [lif_info.get_child_content('address') for lif_info in lif_info_list.get_children()]
