NAME    [Toc]    [Back]

     axe -- ASIX Electronics AX88172 USB Ethernet driver

SYNOPSIS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     The axe driver provides support for USB ethernet adapters based on the
     ASIX Electronics AX88172 USB 2.0 chipset, including the following:

     +o	 D-Link DUBE100
     +o	 LinkSys USB200M
     +o	 Netgear FA120

     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 performace with 1.x contollers 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 endpoints.


     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 specified.

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

DIAGNOSTICS    [Toc]    [Back]

     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    [Toc]    [Back]

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

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

HISTORY    [Toc]    [Back]

     The axe device driver first appeared in FreeBSD 5.0.

AUTHORS    [Toc]    [Back]

     The axe driver was written by Bill Paul <[email protected]>.


FreeBSD 5.2.1			April 20, 2003			 FreeBSD 5.2.1