man page for an driver, obtained from FreeBSD.
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share/man/man4/an.4
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share/man/man4/an.4
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.\" $NetBSD: an.4,v 1.1 2000/12/13 21:00:53 onoe Exp $
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.\"
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.\" Copyright (c) 1997, 1998, 1999
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.\" Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Bill Paul.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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.\" THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD: src/share/man/man4/an.4,v 1.6 2000/11/17 11:43:59 ru Exp $
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.\"
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.Dd December 13, 2000
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.Dt AN 4 i386
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.Os
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.Sh NAME
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.Nm an
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.Nd
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Aironet Communications 4500/4800 wireless network adapter driver
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.Sh SYNOPSIS
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.Cd "wi* at pcmcia? function ?"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for Aironet Communications 4500 and 4800
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wireless network adapters.
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This includes the ISA, PCI and PCMCIA
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varieties.
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The 4500 series adapters operate at 1 and 2Mbps while
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the 4800 series can operate at 1, 2, 5.5 and 11Mbps.
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The ISA, PCI
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and PCMCIA devices are all based on the same core PCMCIA modules
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and all have the same programming interface, however unlike the
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Lucent WaveLAN/IEEE cards, the ISA and PCI cards appear to the
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host as normal ISA and PCI devices and no not require any PCMCIA
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support.
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.Pp
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The PCMCIA Aironet cards require PCMCIA support.
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ISA cards can either be configured to use ISA Plug and Play
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or to use a particular I/O address and IRQ
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by properly setting the DIP switches on the board.
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(The default
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switch setting is for plug and play.)
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The
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.Nm
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driver has Plug and Play support and will work in either configuration,
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however when using a hard-wired I/O address and IRQ, the driver
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configuration and the NIC's switch settings must agree.
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PCI cards
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require no switch settings of any kind and will be automatically
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probed and attached.
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.Pp
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All host/device interaction with the Aironet cards is via programmed I/O.
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The Aironet devices support 802.11 and 802.3 frames, power management,
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BSS (infrastructure) and IBSS (ad-hoc) operation modes.
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The
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.Nm
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driver encapsulates all IP and ARP traffic as 802.11 frames, however
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it can receive either 802.11 or 802.3 frames.
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Transmit speed is
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selectable between 1Mbps, 2Mbps, 5.5Mbps, 11Mbps or
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"auto" (the NIC automatically chooses the best speed).
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.Pp
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By default, the
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.Nm
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driver configures the Aironet card to join an access point with an SSID
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of null string.
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For adhoc mode, in which
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stations can communicate among each other without the aid of an access
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point, the driver must be set using
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.Xr ifconfig 8 .
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8
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and
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.Xr ifmedia 4 .
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.Sh HARDWARE
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Cards supported by the
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.Nm
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driver include:
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.Pp
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.Bl -item -offset indent
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.It
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Aironet 4500 Series
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.It
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Aironet 4800 Series
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.It
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Cisco Aironet 340 Series
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "an%d: init failed"
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The Aironet card failed to come ready after an initialization command was
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issued.
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.It "an%d: failed to allocate %d bytes on NIC"
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The driver was unable to allocate memory for transmit frames in the
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NIC's on-board RAM.
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.It "an%d: device timeout"
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The Aironet card failed to generate an interrupt to acknowledge a transmit
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command.
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr ifmedia 4 ,
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.Xr netintro 4 ,
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 4.0 ,
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and then in
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.Nx 1.6 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Bill Paul Aq wpaul@ee.columbia.edu .
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