NAME    [Toc]    [Back]

     an - Aironet Communications 4500/4800 IEEE 802.11DS wireless
network
     adapter

SYNOPSIS    [Toc]    [Back]

     an* at pcmcia? function ?
     an* at pci? dev ? function ?
     an* at isapnp?

DESCRIPTION    [Toc]    [Back]

     The  an  driver  provides support for the Aironet Communications 4500, 4800
     (aka Cisco 340), and Cisco 350 IEEE 802.11  Direct  Sequence
wireless network
 adapters.  This includes the ISA, PCI, and PCMCIA varieties.  The
     4500 series adapters operate at 1 and 2Mbps while  the  4800
and 350 series
     can  operate  at  1,  2, 5.5, and 11Mbps.  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  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
BSS operation
     with  an SSID of "".  In this mode, stations can communicate
among each
     other without the aid of an access point.  To join a service
set, the
     driver must be set for BSS mode using the ancontrol(8) utility.

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

DIAGNOSTICS    [Toc]    [Back]

     an%d: init failed  The Aironet card failed to come 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    [Toc]    [Back]

     arp(4), atw(4), intro(4),  isapnp(4),  netintro(4),  pci(4),
pcmcia(4),
     wi(4), hostname.if(5), ancontrol(8), ifconfig(8)

HISTORY    [Toc]    [Back]

     The an device driver first appeared in FreeBSD 4.0.  OpenBSD
support was
     added in OpenBSD 2.7.

AUTHORS    [Toc]    [Back]

     The    an    driver    was    written    by    Bill     Paul
<[email protected]> and ported
     to OpenBSD by
     Michael Shalayeff <[email protected]>.

OpenBSD      3.6                       September     10,     1999