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NAME

     zyd - ZyDAS ZD1211/ZD1211B USB IEEE 802.11b/g wireless network device

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your
     kernel configuration file:

           device ehci
           device uhci
           device ohci
           device usb
           device zyd
           device wlan
           device wlan_amrr

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

           if_zyd_load="YES"

DESCRIPTION

     The zyd driver provides support for wireless network adapters based
     around the ZyDAS ZD1211 and ZD1211B USB chips.

     These are the modes the zyd driver can operate in:

     BSS mode       Also known as infrastructure mode, this is used when
                    associating with an access point, through which all
                    traffic passes.  This mode is the default.

     monitor mode   In this mode the driver is able to receive packets without
                    associating with an access point.  This disables the
                    internal receive filter and enables the card to capture
                    packets from networks which it wouldn’t normally have
                    access to, or to scan for access points.

     zyd supports software WEP.  Wired Equivalent Privacy (WEP) is the de
     facto encryption standard for wireless networks.  It can be typically
     configured in one of three modes: no encryption; 40-bit encryption; or
     104-bit encryption.  Unfortunately, due to serious weaknesses in WEP
     protocol it is strongly recommended that it not be used as the sole
     mechanism to secure wireless communication.  WEP is not enabled by
     default.

HARDWARE

     The following devices are known to be supported by the zyd driver:

           3COM 3CRUSB10075
           Acer WLAN-G-US1
           Airlink+ AWLL3025
           Airlink 101 AWLL3026
           AOpen 802.11g WL54
           Asus A9T integrated wirless
           Asus WL-159g
           Belkin F5D7050 v.4000
           Billion BiPAC 3011G
           Buffalo WLI-U2-KG54L
           CC&C WL-2203B
           DrayTek Vigor 550
           Edimax EW-7317UG
           Edimax EW-7317LDG
           Fiberline Networks WL-43OU
           iNexQ UR055g
           Linksys WUSBF54G
           Longshine LCS-8131G3
           MSI US54SE
           Philips SNU5600
           Planet WL-U356
           Planex GW-US54GZ
           Planex GW-US54GZL
           Planex GW-US54Mini
           Safecom SWMULZ-5400
           Sagem XG 760A
           Sagem XG 76NA
           Sandberg Wireless G54 USB
           Sitecom WL-113
           SMC SMCWUSB-G
           Sweex wireless USB 54 Mbps
           Tekram/Siemens USB adapter
           Telegent TG54USB
           Trendnet TEW-424UB
           Trendnet TEW-429UB
           TwinMOS G240
           Unicorn WL-54G
           US Robotics 5423
           X-Micro XWL-11GUZX
           Yakumo QuickWLAN USB
           Zonet ZEW2501
           ZyXEL ZyAIR G-220

EXAMPLES

     The following examples configures zyd0 to join whatever network is
     available on boot, using WEP key “0x1deadbeef1”, channel 11:

           inet 192.168.1.1 netmask 255.255.255.0 wepkey 0x1deadbeef1 channel 11

     Configure zyd0 for WEP, using hex key “0x1deadbeef1”:

           # ifconfig zyd0 wepkey 0x1deadbeef1

     Join an existing BSS network, “my_net”:

           # ifconfig zyd0 192.168.0.2 netmask 0xffffff00 ssid my_net

DIAGNOSTICS

     zyd%d: could not load firmware (error=%d)  An error occurred while
     attempting to upload the firmware to the onboard microcontroller unit.

     zyd%d: could not send command (error=%s)  An attempt to send a command to
     the firmware failed.

     zyd%d: sorry, radio %s is not supported yet  Support for the specified
     radio chip is not yet implemented in the driver.  The device will not
     attach.

     zyd%d: device version mismatch: 0x%x (only >= 43.30 supported)  Early
     revisions of the ZD1211 chipset are not supported by this driver.  The
     device will not attach.

     zyd%d: device timeout  A frame dispatched to the hardware for
     transmission did not complete in time.  The driver will reset the
     hardware.  This should not happen.

SEE ALSO

     arp(4), intro(4), netintro(4), usb(4), wlan(4), wlan_amrr(4), ifconfig(8)

AUTHORS

     The zyd driver was written by Florian Stoehr 〈ich@florian-stoehr.de〉,
     Damien Bergamini 〈damien@openbsd.org〉, and Jonathan Gray
     〈jsg@openbsd.org〉.

CAVEATS

     The zyd driver does not support a lot of the functionality available in
     the hardware.  More work is required to properly support the IBSS and
     power management features.