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zyd - ZyDAS ZD1211/ZD1211B USB IEEE 802.11b/g wireless network device
To compile this driver into the kernel, place the following lines in your
kernel configuration file:
Alternatively, to load the driver as a module at boot time, place the
following line in loader.conf(5):
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
The following devices are known to be supported by the zyd driver:
Airlink 101 AWLL3026
AOpen 802.11g WL54
Asus A9T integrated wirless
Belkin F5D7050 v.4000
Billion BiPAC 3011G
DrayTek Vigor 550
Fiberline Networks WL-43OU
Sagem XG 760A
Sagem XG 76NA
Sandberg Wireless G54 USB
Sweex wireless USB 54 Mbps
Tekram/Siemens USB adapter
US Robotics 5423
Yakumo QuickWLAN USB
ZyXEL ZyAIR G-220
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
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
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.
arp(4), intro(4), netintro(4), usb(4), wlan(4), wlan_amrr(4), ifconfig(8)
The zyd driver was written by Florian Stoehr 〈email@example.com〉,
Damien Bergamini 〈firstname.lastname@example.org〉, and Jonathan Gray
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.