.BI " [rate " R "] [rts " RT "] [frag " FT "] [txpower " T ]
.br
.BI " [enc " E "] [key " K "] [power " P "] [retry " R ]
+.br
+.BI " [commit]
+.br
+.BI "iwconfig --help"
+.br
+.BI "iwconfig --version"
.\"
.\" DESCRIPTION part
.\"
.I Ad-hoc
(network composed of only one cell and without Access Point),
.I Managed
-(network composed of many cells, with roaming or with an Access Point),
+(node connects to a network composed of many Access Points, with roaming),
.I Master
(the node is the synchronisation master or act as an Access Point),
.I Repeater
-(the node forward packets on the air),
+(the node forward packets between other wireless nodes),
.I Secondary
-(the node act as a backup master/repeater) or
+(the node act as a backup master/repeater),
+.I Monitor
+(the node act as a passive monitor and only receives packets) or
.IR Auto .
.br
.B Example :
.br
.I " iwconfig eth0 mode Managed"
+.br
+.I " iwconfig eth0 mode Ad-Hoc"
.TP
.B ap
-Register to the Access Point given by the address, if it is
-possible. When the quality of the connection goes too low, the driver
-may revert back to automatic mode.
+Force the card to register to the Access Point given by the address,
+if it is possible. When the quality of the connection goes too low,
+the driver may revert back to automatic mode (the card finds the best
+Access Point in range).
+.br
+You may also use
+.I off
+to re-enable automatic mode without changing the current Access Point,
+or you may use
+.I any
+or
+.I auto
+to force the card to reassociate with the current best Access Point.
.br
.B Example :
.br
.I " iwconfig eth0 ap 00:60:1D:01:23:45"
+.br
+.I " iwconfig eth0 ap any"
+.br
+.I " iwconfig eth0 ap off"
.TP
.BR nick [name]
Set the nickname, or the station name. Most 802.11 products do define
.I " iwconfig eth0 rate 11M"
.br
.I " iwconfig eth0 rate auto"
+.br
+.I " iwconfig eth0 rate 5.5M auto"
.TP
.BR rts [_threshold]
RTS/CTS adds a handshake before each packet transmission to make sure
.I " iwconfig eth0 frag off"
.TP
.BR key / enc [ryption]
-Used to manipulate encryption or scrambling keys and encryption mode.
+Used to manipulate encryption or scrambling keys and security mode.
.br
To set the current encryption key, just enter the key in hex digits as
.IR XXXX-XXXX-XXXX-XXXX " or " XXXXXXXX .
-To set a key other than the current key, append
+To set a key other than the current key, prepend or append
.I [index]
-to the key itself. You can also enter the key as an ASCII string by
-using the
+to the key itself (this won't change which is the active key). You can
+also enter the key as an ASCII string by using the
.I s:
-prefix.
+prefix. Passphrase is currently not supported.
.br
To change which key is the current active key, just enter
.I [index]
(without entering any key value).
.br
.IR off " and " on
-disable and reenable encryption,
+disable and reenable encryption.
+.br
+The security mode may be
+.I open
+or
+.IR restricted ,
+and its meaning depend on the card used. With most card, in
.I open
-set the system in open mode (accept non-encrypted packets) and
+mode no authentication is used and the card may also accept
+non-encrypted sessions, whereas in
.I restricted
-discard non-encrypted packets.
+mode only encrypted sessions are accepted and the card will use
+authentication if available.
+.br
+If you need to set multiple keys, or set a key and change the active
+key, you need to use multiple
+.B key
+directives. Arguments can be put in any order, the last one will take
+precendence.
.br
.B Examples :
.br
.I " iwconfig eth0 key [2] open"
.br
.I " iwconfig eth0 key off"
+.br
+.I " iwconfig eth0 key restricted [3] 0123456789"
+.br
+.I " iwconfig eth0 key 01-23 key 45-67 [4] key [4]"
.TP
.BR power
Used to manipulate power management scheme parameters and mode.
.I " iwconfig eth0 retry lifetime 300m"
.br
.I " iwconfig eth0 retry min limit 8"
+.TP
+.BR commit
+Some cards may not apply changes done through Wireless Extensions
+immediately (they may wait to agregate the changes or apply it only
+when the card is brought up via ifconfig). This command (when
+available) force the card to apply all pending changes.
+.br
+This is normally not needed, because the card will eventually apply
+the changes, but can be usefull for debugging.
.\"
.\" DISPLAY part
.\"
.br
See above for explanations of what these parameters mean.
.br
-If the label for bitrate is followed by
+If the label for some values (such as bitrate) is followed by
.RB ` = ',
it means that the parameter is fixed and forced to that value, if it
is followed by
.I /proc/net/wireless
exists,
.I iwconfig
-will also display its content :
+will also display its content. Note that those values will depend on
+the driver and the hardware specifics, so you need to refer to your
+driver documentation for proper interpretation of those values.
.TP
.B Link quality
-Quality of the link or the modulation (what is the level of contention
-or interference, or how good the received signal is).
+Overall quality of the link. May be based on the level of contention
+or interference, the bit or frame error rate, how good the received
+signal is, some timing synchronisation, or other hardware metric. This
+is an aggregate value, and depend totally on the driver and hardware.
.TP
.B Signal level
-Received signal strength (how strong the received signal is).
+Received signal strength (RSSI - how strong the received signal
+is). May be arbitrary units or dBm,
+.I iwconfig
+uses driver meta information to interpret the raw value given by
+.I /proc/net/wireless
+and display the proper unit or maximum value (using 8 bit arithmetic). In
+.I Ad-Hoc
+mode, this may be undefined and you should use
+.IR iwspy .
.TP
.B Noise level
-Background noise level (when no packet is transmited).
+Background noise level (when no packet is transmited). Similar
+comments as for
+.BR "Signal level" .
+.TP
+.B Rx invalid nwid
+Number of packets received with a different NWID or ESSID. Used to
+detect configuration problems or adjacent network existence (on the
+same frequency).
.TP
-.B invalid nwid
-Number of packets received with a different NWID. Used to detect
-configuration problems or adjacent network existence.
+.B Rx invalid crypt
+Number of packets that the hardware was unable to decrypt. This can be
+used to detect invalid encryption settings.
.TP
-.B invalid crypt
-Number of packets that the hardware was unable to decrypt.
+.B Rx invalid frag
+Number of packets for which the hardware was not able to properly
+re-assemble the link layer fragments (most likely one was missing).
.TP
-.B invalid misc
+.B Tx excessive retries
+Number of packets that the hardware failed to deliver. Most MAC
+protocol will retry the packet a number of time before giving up.
+.TP
+.B Invalid misc
Other packets lost in relation with specific wireless operations.
+.TP
+.B Missed beacon
+Number of periodic beacons from the Cell or the Access Point we have
+missed. Beacons are sent at regular interval to maintain the cell
+coordination, failure to receive them usually indicate that we are out
+of range.
.\"
.\" AUTHOR part
.\"
.BR ifconfig (8),
.BR iwspy (8),
.BR iwlist (8),
+.BR iwevent (8),
.BR iwpriv (8),
-.BR wavelan (4),
-.BR wavelan_cs (4),
-.BR wvlan_cs (4),
-.BR netwave_cs (4).
+.BR wireless (7).
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