def _extend_port_dict_binding(self, context, port):
        cfg_vif_type = cfg.CONF.NOVA.vif_type.lower()
        if not cfg_vif_type in (portbindings.VIF_TYPE_OVS,
                                portbindings.VIF_TYPE_IVS):
            LOG.warning(_("Unrecognized vif_type in configuration "
                          "[%s]. Defaulting to ovs."),
                        cfg_vif_type)
            cfg_vif_type = portbindings.VIF_TYPE_OVS
        # In ML2, the host_id is already populated
        if portbindings.HOST_ID in port:
            hostid = port[portbindings.HOST_ID]
        else:
            hostid = porttracker_db.get_port_hostid(context, port['id'])
        if hostid:
            port[portbindings.HOST_ID] = hostid
            override = self._check_hostvif_override(hostid)
            if override:
                cfg_vif_type = override
        port[portbindings.VIF_TYPE] = cfg_vif_type

        port[portbindings.VIF_DETAILS] = {
            # TODO(rkukura): Replace with new VIF security details
            portbindings.CAP_PORT_FILTER:
            'security-group' in self.supported_extension_aliases,
            portbindings.OVS_HYBRID_PLUG: True
        }
        return port

    def _extend_port_dict_binding(self, context, port):
        cfg_vif_type = cfg.CONF.NOVA.vif_type.lower()
        if not cfg_vif_type in (portbindings.VIF_TYPE_OVS, portbindings.VIF_TYPE_IVS):
            LOG.warning(_("Unrecognized vif_type in configuration " "[%s]. Defaulting to ovs. "), cfg_vif_type)
            cfg_vif_type = portbindings.VIF_TYPE_OVS
        hostid = porttracker_db.get_port_hostid(context, port.get("device_id"))
        if hostid:
            override = self._check_hostvif_override(hostid)
            if override:
                cfg_vif_type = override
        port[portbindings.VIF_TYPE] = cfg_vif_type

        port[portbindings.CAPABILITIES] = {
            portbindings.CAP_PORT_FILTER: "security-group" in self.supported_extension_aliases
        }
        return port