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ZYD(4)		       FreeBSD Kernel Interfaces Manual			ZYD(4)

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 asso-
		    ciating 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 pro-
     tocol it is strongly recommended that it not be used as the sole mecha-
     nism 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 wireless
	   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
	   MyTek MWU-201 USB adapter
	   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 example configures zyd0 to join whatever network is avail-
     able 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 transmis-
     sion 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.

FreeBSD	9.2		       November	1, 2008			   FreeBSD 9.2

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | EXAMPLES | DIAGNOSTICS | SEE ALSO | AUTHORS | CAVEATS

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