-#define IFF_LLC0 0x1000 /* interface driver control/status */
-#define IFF_LLC1 0x2000 /* interface driver control/status */
-#define IFF_LLC2 0x4000 /* interface driver control/status */
+#define IFF_LLC0 0x1000 /* IEEE 802.2 LLC class 0 */
+#define IFF_LLC1 0x2000 /* IEEE 802.2 LLC class 1 */
+#define IFF_LLC2 0x4000 /* IEEE 802.2 LLC class 2 */
+#ifdef notyet
+#define IFF_ALTPHYS 0x8000 /* alternative physical connection */
+#define IFF_MULTICAST 0x10000 /* i'face supports multicast */
+#define IFF_VIRTUAL 0x20000 /* i'face is really a VIF */