Index: head/sys/dev/usb/net/if_ure.c
===================================================================
--- head/sys/dev/usb/net/if_ure.c
+++ head/sys/dev/usb/net/if_ure.c
@@ -62,6 +62,9 @@
     "Debug level");
 #endif
 
+#define	ETHER_IS_ZERO(addr) \
+	(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
+
 /*
  * Various supported device vendors/products.
  */
@@ -673,12 +676,20 @@
 	else
 		ure_rtl8153_init(sc);
 
-	if (sc->sc_chip & URE_CHIP_VER_4C00)
+	if ((sc->sc_chip & URE_CHIP_VER_4C00) ||
+	    (sc->sc_chip & URE_CHIP_VER_4C10))
 		ure_read_mem(sc, URE_PLA_IDR, URE_MCU_TYPE_PLA,
 		    ue->ue_eaddr, 8);
 	else
 		ure_read_mem(sc, URE_PLA_BACKUP, URE_MCU_TYPE_PLA,
 		    ue->ue_eaddr, 8);
+
+	if (ETHER_IS_ZERO(sc->sc_ue.ue_eaddr)) {
+		device_printf(sc->sc_ue.ue_dev, "MAC assigned randomly\n");
+		arc4rand(sc->sc_ue.ue_eaddr, ETHER_ADDR_LEN, 0);
+		sc->sc_ue.ue_eaddr[0] &= ~0x01; /* unicast */
+		sc->sc_ue.ue_eaddr[0] |= 0x02;  /* locally administered */
+	}
 }
 
 static int
@@ -724,8 +735,10 @@
 	ure_reset(sc);
 
 	/* Set MAC address. */
+	ure_write_1(sc, URE_PLA_CRWECR, URE_MCU_TYPE_PLA, URE_CRWECR_CONFIG);
 	ure_write_mem(sc, URE_PLA_IDR, URE_MCU_TYPE_PLA | URE_BYTE_EN_SIX_BYTES,
 	    IF_LLADDR(ifp), 8);
+	ure_write_1(sc, URE_PLA_CRWECR, URE_MCU_TYPE_PLA, URE_CRWECR_NORAML);
 
 	/* Reset the packet filter. */
 	ure_write_2(sc, URE_PLA_FMC, URE_MCU_TYPE_PLA,