AXE(4)			  OpenBSD Programmer's Manual			AXE(4)

NAME
     axe - ASIX Electronics AX88172/AX88178/AX88772 10/100/Gigabit USB
     Ethernet device

SYNOPSIS
     axe*   at uhub?
     rlphy* at mii?
     eephy* at mii?

DESCRIPTION
     The axe driver provides support for USB Ethernet adapters based on the
     ASIX Electronics AX88172, AX88178, and AX88772 USB 2.0 chipsets,
     including the following:

	   Apple USB Ethernet Adapter A1277
	   ATEN UC-210T
	   BAFO BF-320
	   Billionton Systems USB2AR
	   Buffalo(MELCO) LUA-U2-GT
	   Buffalo(MELCO) LUA-U2-KTX
	   Corega FEther USB2-TX
	   D-Link DUB-E100
	   Good Way GWUSB2E
	   Hawking UF200
	   Intellinet USB 2.0 to Ethernet (rev A)
	   IO-Data ETG-US2
	   JVC MP-PRX1
	   Konig CMP-NWUSB20
	   Level One USB-0200
	   Linksys USB200M
	   Linksys USB1000
	   Logitec LAN-GTJ/U2
	   Netgear FA120
	   Nintendo Wii USB Lan Ethernet Adapter RVL-015
	   OQO model 01+ Ethernet
	   Sitecom LN-029
	   SMC 2209USB/ETH
	   SnapPort USB 2.0 LAN Adapter
	   ST Lab USB 2.0 Fast Ethernet
	   Surecom EP-1427X-2
	   System TALKS SGC-X2UL
	   TRENDnet TU2-ET100
	   Z-TEK ZK-R01-2

     The AX88172, AX88178, and AX88772 are USB 2.0 devices designed to work
     with either Ethernet or HomePNA transceivers.  The AX8172 and AX88772
     contain 10/100 Ethernet MACs with MII interfaces.	The AX8178 contains a
     10/100/1000 Gigabit Ethernet MAC with a GMII/MII interface.  All adapters
     will operate with either USB 1.x or USB 2.0 controllers, however
     performance with 1.x controllers will be limited since the USB 1.x
     standard specifies a maximum transfer speed of 12Mbps.  Users with USB
     1.x controllers should therefore not expect to actually achieve 100Mbps
     speeds with these devices.

     A 64-bit multicast hash table is supported, single perfect filter entry
     for the station address, all-multicast mode, and promiscuous mode.
     Packets are received and transmitted over separate USB bulk transfer
     endpoints.

     The axe driver supports the following media types:

     autoselect	 Enable autoselection of the media type and options (this is
		 the default).	The user can manually override the
		 autoselected mode by adding media options to the appropriate
		 hostname.if(5) file.

     10baseT	 Set 10Mbps operation.

     100baseTX	 Set 100Mbps (Fast Ethernet) operation.

     1000baseT	 Set 1000Mbps (Gigabit Ethernet) operation (AX88178 only).

     The axe driver supports the following media options:

     full-duplex  Force full-duplex operation.

     half-duplex  Force half-duplex operation.

     The interface will operate in half-duplex mode if no media option is
     specified.

     For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS
     axe%d: watchdog timeout  A packet was queued for transmission and a
     transmit command was issued, however the device failed to acknowledge the
     transmission before a timeout expired.

     axe%d: no memory for rx list  The driver failed to allocate an mbuf for
     the receiver ring.

SEE ALSO
     arp(4), eephy(4), ifmedia(4), intro(4), netintro(4), rlphy(4), usb(4),
     hostname.if(5), ifconfig(8)

     ASIX AX88172 data sheet, http://www.asix.com.tw.

HISTORY
     The axe device driver first appeared in OpenBSD 3.6.

AUTHORS
     The axe driver was written by Bill Paul <wpaul@windriver.com> and ported
     to OpenBSD by Greg Taleck <taleck@oz.net>.

OpenBSD 4.9		      September 19, 2010		   OpenBSD 4.9

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