table of contents
other sections
AN(4) | Device Drivers Manual | AN(4) |
NAME¶
an
—
Aironet Communications 4500/4800 wireless network
adapter driver
SYNOPSIS¶
To compile this driver into the kernel, place the following lines in your kernel configuration file:device an
device wlan
if_an_load="YES"
DESCRIPTION¶
Thean
driver provides support for Aironet
Communications 4500 and 4800 wireless network adapters and variants, including
the following:
- Aironet Communications 4500 and 4800 series
- Cisco Aironet 340 and 350 series
- Xircom Wireless Ethernet Adapter
an
driver has
Plug and Play support and will work in either configuration, however when
using a hard-wired I/O address and IRQ, the driver configuration and the NIC's
switch settings must agree. PCI cards require no switch settings of any kind
and will be automatically probed and attached.
All host/device interaction with the Aironet cards is via programmed I/O. The
Aironet devices support 802.11 and 802.3 frames, power management, BSS
(infrastructure) and IBSS (ad-hoc) operation modes. The
an
driver encapsulates all IP and ARP
traffic as 802.11 frames, however it can receive either 802.11 or 802.3
frames. Transmit speed is selectable between 1Mbps, 2Mbps, 5.5Mbps, 11Mbps or
"auto" (the NIC automatically chooses the best speed).
By default, the an
driver configures the
Aironet card for infrastructure operation.
For more information on configuring this device, see
ifconfig(8).
DIAGNOSTICS¶
- an%d: init failed
- The Aironet card failed to become ready after an initialization command was issued.
- an%d: failed to allocate %d bytes on NIC
- The driver was unable to allocate memory for transmit frames in the NIC's on-board RAM.
- an%d: device timeout
- The Aironet card failed to generate an interrupt to acknowledge a transmit command.
SEE ALSO¶
altq(4), arp(4), miibus(4), netintro(4), wlan(4), ancontrol(8), ifconfig(8)HISTORY¶
Thean
device driver first appeared in
FreeBSD 4.0.
AUTHORS¶
Thean
driver was written by
Bill Paul
⟨wpaul@ee.columbia.edu⟩.July 16, 2005 | Debian |