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

NAME
     axe - ASIX Electronics AX88172/AX88178/AX88772 10/100/Gigabit USB Ether-
     net 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, includ-
     ing 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 perfor-
     mance 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 con-
     trollers 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.  Pack-
     ets are received and transmitted over separate USB bulk transfer end-
     points.

     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 autoselect-
                 ed 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 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 4.7                    November 8, 2009                              2
