A multicast address may be enabled on a driver with the DL_ENABMULTI_REQ message. The value must be a valid multicast address as defined in Address Formats.
Similarly, a multicast address may be disabled on a driver with the DL_DISABMULTI_REQ message. The value must be a valid multicast address that was enabled on that particular stream with a prior DL_ENABMULTI_REQ.