AXE(4) MidnightBSD Kernel Interfaces Manual AXE(4)

NAME

axe — ASIX Electronics AX88172 USB Ethernet driver

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

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

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

if_axe_load="YES"

DESCRIPTION

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 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).

HARDWARE

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

Buffalo (Melco Inc.) LUA-U2-KTX

D-Link DUBE100

LinkSys USB200M

Netgear FA120

Sitecom LN-029

System TALKS Inc. SGC-X2UL

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

ASIX AX88172 data sheet

,

http://www.asix.com.tw .

HISTORY

The axe device driver first appeared in FreeBSD 5.0.

AUTHORS

The axe driver was written by Bill Paul 〈wpaul@windriver.com〉.

MidnightBSD 0.3 July 16, 2005 MidnightBSD 0.3