Comment 13 for bug 1788403

        guest = self._create_domain_and_network(context, xml, instance,
                                        network_info,
                                        block_device_info=block_device_info,
                                        power_on=power_on,
                                        vifs_already_plugged=True,
                                        post_xml_callback=gen_confdrive)

vifs_already_plugged=True # nova assumes the interfaces in the right state,
I wonder do we need to extend the port info with down_reason or something to know is nova or other user action leaded to the down state.