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an - Aironet Communications 4500/4800 wireless network adapter driver



      an - Aironet Communications 4500/4800 wireless network adapter driver


      device an
      device an0 at isa? port 0x140 irq 5


      The an driver provides support for Aironet Communications 4500 and 4800
      wireless network adapters.  This includes the ISA, PCI and PCMCIA vari‐
      eties.  The 4500 series adapters operate at 1 and 2Mbps while the 4800
      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 PCCARD support.
      The PCMCIA Aironet cards require pccard support, including the kernel
      pccard driver support and the pccardd(8) daemon.  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 come ready after an ini‐
      tialization command was issued.
      an%d: failed to allocate %d bytes on NIC  The driver was unable to allo‐
      cate 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.
      arp(4), netintro(4), ancontrol(8), ifconfig(8)


      The an device driver first appeared in FreeBSD 4.0.


      The an driver was written by Bill Paul 〈〉.


Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.

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