AN(4) | Device Drivers Manual | AN(4) |
an
— Aironet
Communications 4500/4800 IEEE 802.11FH/b wireless network device
an* at pcmcia?
an* at pci?
an* at isapnp?
The an
driver provides support for the
Aironet Communications 4500, 4800 (aka Cisco 340), and Cisco 350 IEEE 802.11
wireless network adapters. This includes the ISA, PCI, and PCMCIA varieties.
The 4500 series adapters operate at 1 and 2Mbps (FH) while the 4800 and 350
series can operate at 1, 2, 5.5, and 11Mbps (DS). The ISA, PCI, and PCMCIA
devices are all based on the same core PCMCIA modules and all have the same
programming interface. However, unlike the Lucent WaveLAN/IEEE cards, the
ISA and PCI cards appear to the host as normal ISA and PCI devices and do
not require any PCMCIA support.
ISA cards can either be configured to use ISA Plug and Play or to
use a particular I/O address and IRQ by properly setting the DIP switches on
the board. (The default switch setting is for plug and play.) The
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 an
driver encapsulates all IP
and ARP traffic as 802.11 frames, though it can receive either 802.11 or
802.3 frames.
These are the modes the an
driver can
operate in:
The an
driver can be configured to use
hardware Wired Equivalent Privacy (WEP). It is strongly recommended that WEP
not be used as the sole mechanism to secure wireless communication, due to
serious weaknesses in it.
The an
driver can be configured at runtime
with ifconfig(8) or on boot
with hostname.if(5).
The following hostname.if(5) example configures an0 to join network “mynwid”, using WEP key “mywepkey”, obtaining an IP address using DHCP:
nwid mynwid nwkey mywepkey dhcp
arp(4), ifmedia(4), intro(4), isapnp(4), netintro(4), pci(4), pcmcia(4), hostname.if(5), ifconfig(8)
The an
device driver first appeared in
FreeBSD 4.0. OpenBSD support
was added in OpenBSD 2.7. A version of the driver
based on the one in NetBSD was added in
OpenBSD 3.9.
The an
driver was written by
Bill Paul
<wpaul@ee.columbia.edu>
and ported to OpenBSD by Michael
Shalayeff
<mickey@openbsd.org>.
Later the NetBSD version of the driver by
Atsushi Onoe was subsequently ported to
OpenBSD by Jonathan Gray
<jsg@openbsd.org>.
Scanning for access points is not currently supported.
February 28, 2015 | OpenBSD-6.4 |