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AXE(4)                 FreeBSD Kernel Interfaces Manual                 AXE(4)

     axe - ASIX Electronics AX88172 USB Ethernet driver

     device ehci
     device uhci
     device ohci
     device usb
     device miibus
     device axe

     The axe driver provides support for USB Ethernet adapters based on the
     ASIX Electronics AX88172 USB 2.0 chipset.

     The AX88172 is a USB 2.0 device which contains a 10/100 Ethernet MAC with
     MII interface and is designed to work with both Ethernet and HomePNA
     transceivers.  The AX88172 will operate with both USB 1.x and 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.

     The AX88172 supports a 64-bit multicast hash table, single perfect filter
     entry for the station address, all-multicast mode and promiscuous mode.
     Packets are received and transmitted over separate USB bulk transfer

     The axe driver supports the following media types:

     autoselect       Enable autoselection of the media type and options.  The
                      user can manually override the autoselected mode by
                      adding media options to the /etc/rc.conf file.

     10baseT/UTP      Set 10Mbps operation.  The mediaopt option can also be
                      used to enable full-duplex operation.  Not specifying
                      full-duplex implies half-duplex mode.

     100baseTX        Set 100Mbps (Fast Ethernet) operation.  The mediaopt
                      option can also be used to enable full-duplex operation.
                      Not specifying full-duplex implies half-duplex mode.

     The axe driver supports the following media options:

     full-duplex      Force full duplex operation.  The interface will operate
                      in half duplex mode if this media option is not

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

     The axe driver supports ASIX Electronics AX88172 based USB Ethernet
     adapters including:

     +o   Buffalo (Melco Inc.) LUA-U2-KTX
     +o   D-Link DUBE100
     +o   LinkSys USB200M
     +o   Netgear FA120
     +o   Sitecom LN-029
     +o   System TALKS Inc. SGC-X2UL

     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.

     arp(4), miibus(4), netintro(4), ng_ether(4), ifconfig(8)

     ASIX AX88172 data sheet,

     The axe device driver first appeared in FreeBSD 5.0.

     The axe driver was written by Bill Paul <>.

FreeBSD 11.0-PRERELEASE         August 25, 2004        FreeBSD 11.0-PRERELEASE


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