def create_port_binding(self, port, host):
        """Enqueue port binding create"""
        if not self.get_instance_type(port):
            return
        for pb_key in self._get_binding_keys(port, host):
            pb_res = MechResource(pb_key, a_const.PORT_BINDING_RESOURCE,
                                  a_const.CREATE)
            self.provision_queue.put(pb_res)