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         kernel configuration file:
               device an
               device wlan
         Alternatively, to load the driver as a module at boot time, place the
         following line in loader.conf(5):


         The an 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
         Support for these devices include the ISA, PCI and PCMCIA varieties.  The
         Aironet 4500 series adapters operate at 1 and 2Mbps while the Aironet
         4800 series and Cisco adapters 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 PCCARD support.
         The PCMCIA Aironet cards require PC Card support, including the kernel
         pccard(4) driver.  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 infrastructure
         For more information on configuring this device, see ifconfig(8).


         an%d: init failed  The Aironet card failed to become ready after an ini-
         tialization command was issued.


         The an driver was written by Bill Paul <>.

    BSD July 16, 2005 BSD


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