Correct the unit of "powersavesleep" argument: it is in TU's, not in
[dragonfly.git] / sbin / ifconfig / ifconfig.8
CommitLineData
984263bc
MD
1.\" Copyright (c) 1983, 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.
9.\" 2. Redistributions in binary form must reproduce the above copyright
10.\" notice, this list of conditions and the following disclaimer in the
11.\" documentation and/or other materials provided with the distribution.
984263bc
MD
12.\" 4. Neither the name of the University nor the names of its contributors
13.\" may be used to endorse or promote products derived from this software
14.\" without specific prior written permission.
15.\"
16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" From: @(#)ifconfig.8 8.3 (Berkeley) 1/5/94
b16c423b 29.\" $FreeBSD: src/sbin/ifconfig/ifconfig.8,v 1.124 2006/10/10 09:44:08 ru Exp $
a33626b9 30.\" $DragonFly: src/sbin/ifconfig/ifconfig.8,v 1.17 2007/03/06 12:22:39 sephe Exp $
984263bc 31.\"
b16c423b 32.Dd November 19, 2006
984263bc
MD
33.Dt IFCONFIG 8
34.Os
35.Sh NAME
36.Nm ifconfig
37.Nd configure network interface parameters
38.Sh SYNOPSIS
39.Nm
40.Op Fl L
55fc9f88 41.Op Fl k
984263bc
MD
42.Op Fl m
43.Ar interface
44.Op Cm create
45.Op Ar address_family
46.Oo
47.Ar address
48.Op Ar dest_address
49.Oc
50.Op Ar parameters
51.Nm
52.Ar interface
53.Cm destroy
54.Nm
55.Fl a
56.Op Fl L
57.Op Fl d
58.Op Fl m
59.Op Fl u
55fc9f88 60.Op Fl v
984263bc
MD
61.Op Ar address_family
62.Nm
63.Fl l
64.Op Fl d
65.Op Fl u
66.Op Ar address_family
67.Nm
68.Op Fl L
69.Op Fl d
55fc9f88 70.Op Fl k
984263bc
MD
71.Op Fl m
72.Op Fl u
55fc9f88 73.Op Fl v
984263bc
MD
74.Op Fl C
75.Sh DESCRIPTION
76The
77.Nm
78utility is used to assign an address
79to a network interface and/or configure
80network interface parameters.
81The
82.Nm
83utility must be used at boot time to define the network address
84of each interface present on a machine; it may also be used at
85a later time to redefine an interface's address
86or other operating parameters.
87.Pp
88The following options are available:
89.Bl -tag -width indent
90.It Ar address
91For the
92.Tn DARPA Ns -Internet
93family,
94the address is either a host name present in the host name data
95base,
96.Xr hosts 5 ,
97or a
98.Tn DARPA
99Internet address expressed in the Internet standard
100.Dq dot notation .
101.Pp
102It is also possible to use the CIDR notation (also known as the
103slash notation) to include the netmask.
104That is, one can specify an address like
105.Li 192.168.0.1/16 .
106.Pp
107For
108.Dq inet6
109family, it is also possible to specify the prefix length using the slash
110notation, like
111.Li ::1/128 .
112See the
113.Cm prefixlen
114parameter below for more information.
115.\" For the Xerox Network Systems(tm) family,
116.\" addresses are
117.\" .Ar net:a.b.c.d.e.f ,
118.\" where
119.\" .Ar net
120.\" is the assigned network number (in decimal),
121.\" and each of the six bytes of the host number,
122.\" .Ar a
123.\" through
124.\" .Ar f ,
125.\" are specified in hexadecimal.
126.\" The host number may be omitted on IEEE 802 protocol
127.\" (Ethernet, FDDI, and Token Ring) interfaces,
128.\" which use the hardware physical address,
129.\" and on interfaces other than the first.
130.\" For the
131.\" .Tn ISO
132.\" family, addresses are specified as a long hexadecimal string,
133.\" as in the Xerox family.
134.\" However, two consecutive dots imply a zero
135.\" byte, and the dots are optional, if the user wishes to (carefully)
136.\" count out long strings of digits in network byte order.
137.Pp
138The link-level
139.Pq Dq link
140address
141is specified as a series of colon-separated hex digits.
142This can be used to
b50e4759 143e.g.\& set a new MAC address on an ethernet interface, though the
984263bc
MD
144mechanism used is not ethernet-specific.
145If the interface is already
146up when this option is used, it will be briefly brought down and
147then brought back up again in order to ensure that the receive
148filter in the underlying ethernet hardware is properly reprogrammed.
149.It Ar address_family
150Specify the
151address family
152which affects interpretation of the remaining parameters.
153Since an interface can receive transmissions in differing protocols
154with different naming schemes, specifying the address family is recommended.
155The address or protocol families currently
156supported are
157.Dq inet ,
158.Dq inet6 ,
159.Dq atalk ,
160.Dq ipx ,
161.\" .Dq iso ,
162and
163.Dq link .
164.\" and
165.\" .Dq ns .
166The default is
167.Dq inet .
168.Dq ether
169and
170.Dq lladdr
171are synonyms for
172.Dq link .
173.It Ar dest_address
174Specify the address of the correspondent on the other end
175of a point to point link.
176.It Ar interface
177This
178parameter is a string of the form
179.Dq name unit ,
180for example,
181.Dq Li ed0 .
182.El
183.Pp
184The following parameters may be set with
185.Nm :
186.Bl -tag -width indent
187.It Cm add
188Another name for the
189.Cm alias
190parameter.
191Introduced for compatibility
192with
193.Bsx .
194.It Cm alias
195Establish an additional network address for this interface.
196This is sometimes useful when changing network numbers, and
197one wishes to accept packets addressed to the old interface.
198If the address is on the same subnet as the first network address
199for this interface, a non-conflicting netmask must be given.
200Usually
201.Li 0xffffffff
202is most appropriate.
203.It Fl alias
b50e4759 204Remove the network address specified.
984263bc
MD
205This would be used if you incorrectly specified an alias, or it
206was no longer needed.
207If you have incorrectly set an NS address having the side effect
208of specifying the host portion, removing all NS addresses will
209allow you to respecify the host portion.
210.It Cm anycast
211(Inet6 only.)
212Specify that the address configured is an anycast address.
213Based on the current specification,
214only routers may configure anycast addresses.
215Anycast address will not be used as source address of any of outgoing
216IPv6 packets.
217.It Cm arp
218Enable the use of the Address Resolution Protocol
219.Pq Xr arp 4
220in mapping
221between network level addresses and link level addresses (default).
222This is currently implemented for mapping between
223.Tn DARPA
224Internet
225addresses and
226.Tn IEEE
227802 48-bit MAC addresses (Ethernet, FDDI, and Token Ring addresses).
228.It Fl arp
229Disable the use of the Address Resolution Protocol
230.Pq Xr arp 4 .
231.It Cm broadcast
232(Inet only.)
233Specify the address to use to represent broadcasts to the
234network.
235The default broadcast address is the address with a host part of all 1's.
236.It Cm debug
237Enable driver dependent debugging code; usually, this turns on
238extra console error logging.
239.It Fl debug
240Disable driver dependent debugging code.
241.It Cm promisc
242Put interface into permanently promiscuous mode.
243.It Fl promisc
244Disable permanently promiscuous mode.
245.It Cm delete
246Another name for the
247.Fl alias
248parameter.
249.It Cm down
250Mark an interface
251.Dq down .
252When an interface is marked
253.Dq down ,
254the system will not attempt to
255transmit messages through that interface.
256If possible, the interface will be reset to disable reception as well.
257This action does not automatically disable routes using the interface.
258.It Cm eui64
259(Inet6 only.)
260Fill interface index
261(lowermost 64bit of an IPv6 address)
262automatically.
b16c423b
SW
263.It Cm ipdst
264This is used to specify an Internet host who is willing to receive
265IP packets encapsulating IPX packets bound for a remote network.
266An apparent point to point link is constructed, and
267the address specified will be taken as the IPX address and network
268of the destination.
984263bc
MD
269.It Cm media Ar type
270If the driver supports the media selection system, set the media type
271of the interface to
272.Ar type .
273Some interfaces support the mutually exclusive use of one of several
274different physical media connectors.
b16c423b 275For example, a 10Mbit/s Ethernet
984263bc
MD
276interface might support the use of either
277.Tn AUI
278or twisted pair connectors.
279Setting the media type to
b16c423b 280.Cm 10base5/AUI
984263bc
MD
281would change the currently active connector to the AUI port.
282Setting it to
b16c423b 283.Cm 10baseT/UTP
984263bc
MD
284would activate twisted pair.
285Refer to the interfaces' driver
286specific documentation or man page for a complete list of the
287available types.
288.It Cm mediaopt Ar opts
289If the driver supports the media selection system, set the specified
290media options on the interface.
291The
292.Ar opts
293argument
294is a comma delimited list of options to apply to the interface.
295Refer to the interfaces' driver specific man page for a complete
296list of available options.
297.It Fl mediaopt Ar opts
298If the driver supports the media selection system, disable the
299specified media options on the interface.
b50e4759
MD
300.It Cm mode Ar mode
301If the driver supports the media selection system, set the specified
302operating mode on the interface to
303.Ar mode .
304For IEEE 802.11 wireless interfaces that support multiple operating modes
305this directive is used to select between 802.11a
b16c423b 306.Pq Cm 11a ,
b50e4759 307802.11b
b16c423b 308.Pq Cm 11b ,
b50e4759 309and 802.11g
b16c423b 310.Pq Cm 11g
b50e4759
MD
311operating modes.
312.It Cm name Ar name
313Set the interface name to
314.Ar name .
315.It Cm rxcsum , txcsum
316If the driver supports user-configurable checksum offloading,
317enable receive (or transmit) checksum offloading on the interface.
318Some drivers may not be able to enable these flags independently
319of each other, so setting one may also set the other.
320The driver will offload as much checksum work as it can reliably
321support, the exact level of offloading varies between drivers.
b16c423b
SW
322.It Fl rxcsum , txcsum
323If the driver supports user-configurable checksum offloading,
324disable receive (or transmit) checksum offloading on the interface.
325These settings may not always be independent of each other.
326.It Cm vlanmtu , vlanhwtag
327If the driver offers user-configurable VLAN support, enable
328reception of extended frames or tag processing in hardware,
329respectively.
330Note that this must be issued on a physical interface associated with
331.Xr vlan 4 ,
332not on a
333.Xr vlan 4
334interface itself.
335.It Fl vlanmtu , vlanhwtag
336If the driver offers user-configurable VLAN support, disable
337reception of extended frames or tag processing in hardware,
338respectively.
339.It Cm polling
340Turn on
341.Xr polling 4
342feature and disable interrupts on the interface, if the driver supports
343this mode.
344.It Fl polling
345Turn off
346.Xr polling 4
347feature and enable interrupt mode on the interface.
984263bc
MD
348.It Cm create
349Create the specified network pseudo-device.
350If the interface is given without a unit number, try to create a new
351device with an arbitrary unit number.
352If creation of an arbitrary device is successful, the new device name is
b16c423b
SW
353printed to standard output unless the interface is renamed or destroyed
354in the same
355.Nm
356invocation.
984263bc
MD
357.It Cm destroy
358Destroy the specified network pseudo-device.
359.It Cm plumb
360Another name for the
361.Cm create
362parameter.
363Included for
364.Tn Solaris
365compatibility.
366.It Cm unplumb
367Another name for the
368.Cm destroy
369parameter.
370Included for
371.Tn Solaris
372compatibility.
984263bc
MD
373.It Cm metric Ar n
374Set the routing metric of the interface to
375.Ar n ,
376default 0.
377The routing metric is used by the routing protocol
378.Pq Xr routed 8 .
379Higher metrics have the effect of making a route
b16c423b 380less favorable; metrics are counted as additional hops
984263bc
MD
381to the destination network or host.
382.It Cm mtu Ar n
383Set the maximum transmission unit of the interface to
384.Ar n ,
385default is interface specific.
386The MTU is used to limit the size of packets that are transmitted on an
387interface.
388Not all interfaces support setting the MTU, and some interfaces have
389range restrictions.
390.It Cm netmask Ar mask
391.\" (Inet and ISO.)
392(Inet only.)
393Specify how much of the address to reserve for subdividing
394networks into sub-networks.
395The mask includes the network part of the local address
396and the subnet part, which is taken from the host field of the address.
397The mask can be specified as a single hexadecimal number
398with a leading
399.Ql 0x ,
400with a dot-notation Internet address,
401or with a pseudo-network name listed in the network table
402.Xr networks 5 .
403The mask contains 1's for the bit positions in the 32-bit address
404which are to be used for the network and subnet parts,
405and 0's for the host part.
406The mask should contain at least the standard network portion,
407and the subnet field should be contiguous with the network
408portion.
409.Pp
410The netmask can also be specified in CIDR notation after the address.
411See the
412.Ar address
413option above for more information.
b16c423b
SW
414.It Cm autoconf
415(Inet6 only.)
416Enable autoconfiguration.
417.It Fl autoconf
418Disable autoconfiguration.
419.It Cm pltime Ar n
420(Inet6 only.)
421Set preferred lifetime for the address.
422.It Cm vltime Ar n
423(Inet6 only.)
424Set valid lifetime for the address.
984263bc
MD
425.It Cm prefixlen Ar len
426(Inet6 only.)
427Specify that
428.Ar len
429bits are reserved for subdividing networks into sub-networks.
430The
431.Ar len
432must be integer, and for syntactical reason it must be between 0 to 128.
433It is almost always 64 under the current IPv6 assignment rule.
434If the parameter is omitted, 64 is used.
435.Pp
436The prefix can also be specified using the slash notation after the address.
437See the
438.Ar address
439option above for more information.
b16c423b
SW
440.It Cm deprecated
441(Inet6 only.)
442Set the IPv6 deprecated address bit.
443.It Fl deprecated
444(Inet6 only.)
445Clear the IPv6 deprecated address bit.
446.It Cm tentative
447(Inet6 only.)
448Set the IPv6 tentative address bit.
449.It Fl tentative
450(Inet6 only.)
451Clear the IPv6 tentative address bit.
984263bc
MD
452.\" see
453.\" Xr eon 5 .
454.\" .It Cm nsellength Ar n
455.\" .Pf ( Tn ISO
456.\" only)
457.\" This specifies a trailing number of bytes for a received
458.\" .Tn NSAP
459.\" used for local identification, the remaining leading part of which is
460.\" taken to be the
461.\" .Tn NET
462.\" (Network Entity Title).
463.\" The default value is 1, which is conformant to US
464.\" .Tn GOSIP .
465.\" When an ISO address is set in an ifconfig command,
466.\" it is really the
467.\" .Tn NSAP
468.\" which is being specified.
469.\" For example, in
470.\" .Tn US GOSIP ,
471.\" 20 hex digits should be
472.\" specified in the
473.\" .Tn ISO NSAP
474.\" to be assigned to the interface.
475.\" There is some evidence that a number different from 1 may be useful
476.\" for
477.\" .Tn AFI
478.\" 37 type addresses.
479.It Cm range Ar netrange
480Under appletalk, set the interface to respond to a
481.Ar netrange
482of the form
483.Ar startnet Ns - Ns Ar endnet .
484Appletalk uses this scheme instead of
485netmasks though
b50e4759 486.Fx
984263bc
MD
487implements it internally as a set of netmasks.
488.It Cm remove
489Another name for the
490.Fl alias
491parameter.
492Introduced for compatibility
493with
494.Bsx .
495.It Cm phase
496The argument following this specifies the version (phase) of the
497Appletalk network attached to the interface.
498Values of 1 or 2 are permitted.
499.Sm off
500.It Cm link Op Cm 0 No - Cm 2
501.Sm on
502Enable special processing of the link level of the interface.
503These three options are interface specific in actual effect, however,
504they are in general used to select special modes of operation.
505An example
506of this is to enable SLIP compression, or to select the connector type
507for some Ethernet cards.
508Refer to the man page for the specific driver
509for more information.
510.Sm off
511.It Fl link Op Cm 0 No - Cm 2
512.Sm on
513Disable special processing at the link level with the specified interface.
b16c423b
SW
514.It Cm compress
515Another name for the
516.Cm link0
517parameter.
518.It Cm normal
519Another name for the
520.Fl link0
521parameter.
522.It Cm noicmp
523Another name for the
524.Cm link1
525parameter.
3a593c54
MD
526.It Cm monitor
527Put the interface in monitor mode.
528No packets are transmitted, and received packets are discarded after
529.Xr bpf 4
530processing.
531.It Fl monitor
532Take the interface out of monitor mode.
984263bc
MD
533.It Cm up
534Mark an interface
535.Dq up .
536This may be used to enable an interface after an
537.Dq Nm Cm down .
538It happens automatically when setting the first address on an interface.
539If the interface was reset when previously marked down,
540the hardware will be re-initialized.
55fc9f88
SZ
541.El
542.Pp
543The following parameters are specific to IEEE 802.11 wireless interfaces:
544.Bl -tag -width indent
545.It Cm apbridge
546When operating as an access point, pass packets between
547wireless clients directly (default).
548To instead let them pass up through the
549system and be forwarded using some other mechanism, use
550.Fl apbridge .
551Disabling the internal bridging
552is useful when traffic is to be processed with
553packet filtering.
984263bc 554.It Cm authmode Ar mode
55fc9f88 555Set the desired authentication mode in infrastructure mode.
984263bc
MD
556Not all adaptors support all modes.
557The set of
558valid modes is
55fc9f88
SZ
559.Cm none , open , shared
560(shared key),
561.Cm 8021x
562(IEEE 802.1x),
563and
564.Cm wpa
565(IEEE WPA/WPA2/802.11i).
566The
567.Cm 8021x
984263bc 568and
55fc9f88
SZ
569.Cm wpa
570modes are only useful when using an authentication service
571(a supplicant for client operation or an authenticator when
572operating as an access point).
984263bc 573Modes are case insensitive.
55fc9f88
SZ
574.It Cm bintval Ar interval
575Set the interval at which beacon frames are sent when operating in
576ad-hoc or ap mode.
577The
578.Ar interval
cf00283f 579parameter is specified in TU's (1024 usecs).
55fc9f88 580By default beacon frames are transmitted every 100 TU's.
c36e937b
SZ
581.It Cm bmissthreshold Ar count
582Set the number of consecutive missed beacons at which the station
583will attempt to roam (i.e. search for a new access point).
584The
585.Ar count
586parameter is must be in the range 1 to 255;
587though the upper bound may be reduced according to device capabilities..
588The default threshold is 7 consecutive missed beacons;
589but this may be overridden by the device driver.
590Another name for the
591.Cm bmissthreshold
592parameter is
593.Cm bmiss .
55fc9f88
SZ
594.It Cm bssid Ar address
595Specify the MAC address of the access point to use when operating
596as a station in a BSS network.
597This overrides any automatic selection done by the system.
598To disable a previously selected access point, supply
599.Cm any , none ,
600or
601.Cm -
602for the address.
b16c423b 603This option is useful when more than one access point uses the same SSID.
55fc9f88
SZ
604Another name for the
605.Cm bssid
606parameter is
607.Cm ap .
608.It Cm burst
609Enable packet bursting.
610Packet bursting is a transmission technique whereby the wireless
611medium is acquired once to send multiple frames and the interframe
612spacing is reduced.
613This technique can significantly increase throughput by reducing
614transmission overhead.
615Packet bursting is supported by the 802.11e QoS specification
616and some devices that do not support QoS may still be capable.
617By default packet bursting is enabled if a device is capable
618of doing it.
619To disable packet bursting, use
620.Fl burst .
621.It Cm chanlist Ar channels
622Set the desired channels to use when scanning for access
623points, neighbors in an IBSS network, or looking for unoccupied
624channels when operating as an access point.
625The set of channels is specified as a comma-separated list with
626each element in the list representing either a single channel number or a range
627of the form
628.Dq Li a-b .
629Channel numbers must be in the range 1 to 255 and be permissible
630according to the operating characteristics of the device.
631.It Cm channel Ar number
632Set a single desired channel.
633Channels range from 1 to 255, but the exact selection available
634depends on the region your adaptor was manufactured for.
635Setting
636the channel to
637.Li 0 ,
638.Cm any ,
639or
640.Cm -
641will give you the default for your adaptor.
642Some
643adaptors ignore this setting unless you are in ad-hoc mode.
644Alternatively the frequency, in megahertz, may be specified
645instead of the channel number.
646.It Cm deftxkey Ar index
647Set the default key to use for transmission.
648Typically this is only set when using WEP encryption.
649The
650.Cm weptxkey
651is an alias for this request; it is provided for backwards compatibility.
652.It Cm dtimperiod Ar period
653Set the
654DTIM
655period for transmitting buffered multicast data frames when
656operating in ap mode.
657The
658.Ar period
659specifies the number of beacon intervals between DTIM
660and must be in the range 1 to 15.
661By default DTIM is 1 (i.e., DTIM occurs at each beacon).
662.It Cm fragthreshold Ar length
663Set the threshold for which transmitted frames are broken into fragments.
664The
665.Ar length
666argument is the frame size in bytes and must be in the range 256 to 2346.
667Setting
668.Ar length
669to
670.Li 2346 ,
671.Cm any ,
672or
673.Cm -
674disables transmit fragmentation.
675Not all adaptors honor the fragmentation threshold.
676.It Cm hidessid
677When operating as an access point, do not broadcast the SSID
678in beacon frames or respond to probe request frames unless
679they are directed to the ap (i.e., they include the ap's SSID).
680By default, the SSID is included in beacon frames and
681undirected probe request frames are answered.
682To re-enable the broadcast of the SSID etc., use
683.Fl hidessid .
684.It Cm list active
685Display the list of channels available for use taking into account
686any restrictions set with the
687.Cm chanlist
688directive.
689See the description of
690.Cm list chan
691for more information.
692.It Cm list caps
693Display the adaptor's capabilities, including the operating
694modes supported.
695.It Cm list chan
696Display the list of channels available for use.
697Channels are shown with their IEEE channel number, equivalent
698frequency, and usage modes.
699Channels identified as
700.Ql 11g
701are also usable in
702.Ql 11b
703mode.
704Channels identified as
705.Ql 11a Turbo
706may be used only for Atheros' Static Turbo mode
b16c423b
SW
707specified with
708.Cm mediaopt turbo ) .
55fc9f88
SZ
709Channels marked with a
710.Ql *
711have a regulatory constraint that they be passively scanned.
712This means a station is not permitted to transmit on the channel until
713it identifies the channel is being used for 802.11 communication;
714typically by hearing a beacon frame from an access point operating
715on the channel.
716.Cm list freq
717is another way of requesting this information.
718.It Cm list mac
719Display the current MAC Access Control List state.
720Each address is prefixed with a character that indicates the
721current policy applied to it:
722.Ql +
723indicates the address is allowed access,
724.Ql -
725indicates the address is denied access,
726.Ql *
727indicates the address is present but the current policy open
728(so the ACL is not consulted).
729.It Cm list scan
730Display the access points and/or ad-hoc neighbors
731located in the vicinity.
b16c423b
SW
732The
733.Fl v
734flag may be used to display long SSIDs.
55fc9f88
SZ
735This information may be updated automatically by the adaptor
736and/or with a
737.Cm scan
738request.
739.Cm list ap
740is another way of requesting this information.
741.It Cm list sta
742When operating as an access point display the stations that are
743currently associated.
744When operating in ad-hoc mode display stations identified as
745neighbors in the IBSS.
746.It Cm list wme
747Display the current parameters to use when operating in WME mode.
748When WME mode is enabled for an adaptor this information will be
749displayed with the regular status; this command is mostly useful
750for examining parameters when WME mode is disabled.
751See the description of the
752.Cm wme
753directive for information on the various parameters.
754.It Cm mcastrate Ar rate
755Set the rate for transmitting multicast/broadcast frames.
b16c423b 756Rates are specified as megabits/second in decimal; e.g.\& 5.5 for 5.5 Mbit/s.
55fc9f88
SZ
757This rate should be valid for the current operating conditions;
758if an invalid rate is specified drivers are free to chose an
759appropriate rate.
984263bc 760.It Cm powersave
55fc9f88
SZ
761Enable powersave operation.
762When operating as a client, the station will conserve power by
763periodically turning off the radio and listening for
764messages from the access point telling it there are packets waiting.
765The station must then retrieve the packets.
766When operating as an access point, the station must honor power
767save operation of associated clients.
768Not all devices support power save operation, either as a client
769or as an access point.
770Use
771.Fl powersave
772to disable powersave operation.
b16c423b
SW
773.It Cm powersavemode Ar mode
774Set powersave mode.
775The set of valid modes is
776.Cm off
777(same as
778.Fl powersave),
779.Cm on
780(same as
781.Cm powersave),
782and
783.Cm cam
784(same as
785.Cm powersave).
984263bc 786.It Cm powersavesleep Ar sleep
a33626b9
SZ
787Set the desired max powersave sleep time in TU's (1024 usecs).
788By default the max powersave sleep time is 100 TU's.
b50e4759 789.It Cm protmode Ar technique
55fc9f88 790For interfaces operating in 802.11g, use the specified
b50e4759
MD
791.Ar technique
792for protecting OFDM frames in a mixed 11b/11g network.
793The set of valid techniques is
55fc9f88 794.Cm off , cts
b50e4759
MD
795(CTS to self),
796and
55fc9f88 797.Cm rtscts
b50e4759
MD
798(RTS/CTS).
799Technique names are case insensitive.
55fc9f88
SZ
800.It Cm pureg
801When operating as an access point in 802.11g mode allow only
80211g-capable stations to associate (11b-only stations are not
803permitted to associate).
804To allow both 11g and 11b-only stations to associate, use
805.Fl pureg .
806.It Cm roaming Ar mode
807When operating as a station, control how the system will
808behave when communication with the current access point
809is broken.
810The
811.Ar mode
812argument may be one of
813.Cm device
814(leave it to the hardware device to decide),
815.Cm auto
816(handle either in the device or the operating system\[em]as appropriate),
817.Cm manual
818(do nothing until explicitly instructed).
819By default, the device is left to handle this if it is
820capable; otherwise, the operating system will automatically
821attempt to reestablish communication.
822Manual mode is mostly useful when an application wants to
823control the selection of an access point.
b9334f94
SZ
824.It Cm ratectl Ar algorithm
825Set the TX rate control algorithm.
826The set of valid
827.Ar algorithm
828is
829.Cm onoe
830(Onoe TX rate control algorithm)
831and
832.Cm amrr
833(AMRR TX rate control algorithm).
834.Ar Algorithm
835names are case sensitive.
b50e4759 836.It Cm rtsthreshold Ar length
55fc9f88 837Set the threshold for which
b50e4759
MD
838transmitted frames are preceded by transmission of an
839RTS
840control frame.
841The
842.Ar length
843argument
55fc9f88
SZ
844is the frame size in bytes and must be in the range 1 to 2346.
845Setting
846.Ar length
847to
848.Li 2346 ,
849.Cm any ,
850or
851.Cm -
852disables transmission of RTS frames.
b50e4759 853Not all adaptors support setting the RTS threshold.
55fc9f88
SZ
854.It Cm ssid Ar ssid
855Set the desired Service Set Identifier (aka network name).
856The SSID is a string up to 32 characters
857in length and may be specified as either a normal string or in
858hexadecimal when preceded by
859.Ql 0x .
860Additionally, the SSID may be cleared by setting it to
861.Ql - .
862.It Cm scan
863Initiate a scan of neighboring stations, wait for it to complete, and
864display all stations found.
865Only the super-user can initiate a scan.
866Depending on the capabilities of the APs, the following
867flags can be included in the output:
868.Bl -tag -width 3n
b16c423b
SW
869.It Li A
870Channel Agility.
871Indicates that the station support channel hopping as described by the
872IEEE 802.11b specification.
873.It Li B
874Packet Binary Convolution Code (PBCC).
875A modulation alternative to the standard OFDM method.
876.It Dv C
877Pollreq
878.It Dv c
879Pollable
880.It Dv D
881Direct Sequence Spread Spectrum - Orthogonal Frequency Division
882Multiplexing (DSSS-OFDM).
883Indicates the the station supports DSSS-OFDM modulation.
55fc9f88
SZ
884.It Li E
885Extended Service Set (ESS).
886Indicates that the station is part of an infrastructure network
887(in contrast to an IBSS/ad-hoc network).
888.It Li I
889IBSS/ad-hoc network.
890Indicates that the station is part of an ad-hoc network
891(in contrast to an ESS network).
892.It Li P
893Privacy.
894Data confidentiality is required for all data frames
895exchanged within the BSS.
896This means that this BSS requires the station to
897use cryptographic means such as WEP, TKIP or AES-CCMP to
898encrypt/decrypt data frames being exchanged with others.
b16c423b
SW
899.It Dv R
900Robust Security Network (RSN).
901Indicates that the station supports the IEEE 802.11i authentication
902and key management protocol.
55fc9f88
SZ
903.It Li S
904Short Preamble.
905Indicates that the network is using short preambles (defined
906in 802.11b High Rate/DSSS PHY, short preamble utilizes a
90756 bit sync field in contrast to a 128 bit field used in long
908preamble mode).
909.It Li s
910Short slot time.
911Indicates that the network is using a short slot time.
912.El
913.Pp
914The
915.Cm list scan
916request can be used to show recent scan results without
917initiating a new scan.
b16c423b
SW
918.Pp
919The
920.Fl v
921flag may be used to prevent the shortening of long SSIDs.
55fc9f88
SZ
922.It Cm stationname Ar name
923Set the name of this station.
924It appears that the station name is not really part of the IEEE 802.11
925protocol though all interfaces seem to support it.
926As such it only
927seems to be meaningful to identical or virtually identical equipment.
928Setting the station name is identical in syntax to setting the SSID.
b50e4759 929.It Cm txpower Ar power
55fc9f88 930Set the power used to transmit frames.
b50e4759
MD
931The
932.Ar power
933argument
934is a unitless value in the range 0 to 100 that is interpreted
935by drivers to derive a device-specific value.
936Out of range values are truncated.
937Typically only a few discreet power settings are available and
938the driver will use the setting closest to the specified value.
939Not all adaptors support changing the transmit power.
984263bc 940.It Cm wepmode Ar mode
55fc9f88 941Set the desired WEP mode.
984263bc
MD
942Not all adaptors support all modes.
943The set of valid modes is
55fc9f88 944.Cm off , on ,
984263bc 945and
55fc9f88 946.Cm mixed .
b50e4759 947The
55fc9f88 948.Cm mixed
984263bc
MD
949mode explicitly tells the adaptor to allow association with access
950points which allow both encrypted and unencrypted traffic.
951On these adaptors,
55fc9f88 952.Cm on
984263bc
MD
953means that the access point must only allow encrypted connections.
954On other adaptors,
55fc9f88 955.Cm on
984263bc 956is generally another name for
55fc9f88 957.Cm mixed .
984263bc
MD
958Modes are case insensitive.
959.It Cm weptxkey Ar index
55fc9f88
SZ
960Set the WEP key to be used for transmission.
961This is the same as setting the default transmission key with
962.Cm deftxkey .
984263bc 963.It Cm wepkey Ar key Ns | Ns Ar index : Ns Ar key
55fc9f88 964Set the selected WEP key.
984263bc
MD
965If an
966.Ar index
967is not given, key 1 is set.
968A WEP key will be either 5 or 13
969characters (40 or 104 bits) depending of the local network and the
970capabilities of the adaptor.
971It may be specified either as a plain
55fc9f88 972string or as a string of hexadecimal digits preceded by
984263bc
MD
973.Ql 0x .
974For maximum portability, hex keys are recommended;
975the mapping of text keys to WEP encryption is usually driver-specific.
976In particular, the
977.Tn Windows
978drivers do this mapping differently to
b50e4759 979.Fx .
984263bc
MD
980A key may be cleared by setting it to
981.Ql - .
982If WEP is supported then there are at least four keys.
983Some adaptors support more than four keys.
984If that is the case, then the first four keys
985(1-4) will be the standard temporary keys and any others will be adaptor
986specific keys such as permanent keys stored in NVRAM.
55fc9f88
SZ
987.It Cm wme
988Enable Wireless Multimedia Extensions (WME) support, if available,
989for the specified interface.
990WME is a subset of the IEEE 802.11e standard to support the
991efficient communication of realtime and multimedia data.
992To disable WME support, use
993.Fl wme .
994.Pp
995The following parameters are meaningful only when WME support is in use.
996Parameters are specified per-AC (Access Category) and
997split into those that are used by a station when acting
998as an access point and those for client stations in the BSS.
999The latter are received from the access point and may not be changed
1000(at the station).
1001The following Access Categories are recognized:
1002.Pp
1003.Bl -tag -width ".Cm AC_BK" -compact
1004.It Cm AC_BE
1005(or
1006.Cm BE )
1007best effort delivery,
1008.It Cm AC_BK
1009(or
1010.Cm BK )
1011background traffic,
1012.It Cm AC_VI
1013(or
1014.Cm VI )
1015video traffic,
1016.It Cm AC_VO
1017(or
1018.Cm VO )
1019voice traffic.
1020.El
1021.Pp
1022AC parameters are case-insensitive.
1023Traffic classification is done in the operating system using the
1024vlan priority associated with data frames or the
1025ToS (Type of Service) indication in IP-encapsulated frames.
1026If neither information is present, traffic is assigned to the
1027Best Effort (BE) category.
1028.Bl -tag -width indent
1029.It Cm ack Ar ac
1030Set the ACK policy for QoS transmissions by the local station;
1031this controls whether or not data frames transmitted by a station
1032require an ACK response from the receiving station.
1033To disable waiting for an ACK use
1034.Fl ack .
1035This parameter is applied only to the local station.
1036.It Cm acm Ar ac
1037Enable the Admission Control Mandatory (ACM) mechanism
1038for transmissions by the local station.
1039To disable the ACM use
1040.Fl acm .
1041On stations in a BSS this parameter is read-only and indicates
1042the setting received from the access point.
1043NB: ACM is not supported right now.
1044.It Cm aifs Ar ac Ar count
1045Set the Arbitration Inter Frame Spacing (AIFS)
1046channel access parameter to use for transmissions
1047by the local station.
1048On stations in a BSS this parameter is read-only and indicates
1049the setting received from the access point.
1050.It Cm cwmin Ar ac Ar count
1051Set the CWmin channel access parameter to use for transmissions
1052by the local station.
1053On stations in a BSS this parameter is read-only and indicates
1054the setting received from the access point.
1055.It Cm cwmax Ar ac Ar count
1056Set the CWmax channel access parameter to use for transmissions
1057by the local station.
1058On stations in a BSS this parameter is read-only and indicates
1059the setting received from the access point.
1060.It Cm txoplimit Ar ac Ar limit
1061Set the Transmission Opportunity Limit channel access parameter
1062to use for transmissions by the local station.
1063This parameter defines an interval of time when a WME station
1064has the right to initiate transmissions onto the wireless medium.
1065On stations in a BSS this parameter is read-only and indicates
1066the setting received from the access point.
1067.It Cm bss:aifs Ar ac Ar count
1068Set the AIFS channel access parameter to send to stations in a BSS.
1069This parameter is meaningful only when operating in ap mode.
1070.It Cm bss:cwmin Ar ac Ar count
1071Set the CWmin channel access parameter to send to stations in a BSS.
1072This parameter is meaningful only when operating in ap mode.
1073.It Cm bss:cwmax Ar ac Ar count
1074Set the CWmax channel access parameter to send to stations in a BSS.
1075This parameter is meaningful only when operating in ap mode.
1076.It Cm bss:txoplimit Ar ac Ar limit
1077Set the TxOpLimit channel access parameter to send to stations in a BSS.
1078This parameter is meaningful only when operating in ap mode.
1079.El
1080.El
1081.Pp
1082The following parameters support an optional access control list
1083feature available with some adaptors when operating in ap mode; see
1084.Xr wlan_acl 4 .
1085This facility allows an access point to accept/deny association
1086requests based on the MAC address of the station.
1087Note that this feature does not significantly enhance security
1088as MAC address spoofing is easy to do.
1089.Bl -tag -width indent
1090.It Cm mac:add Ar address
1091Add the specified MAC address to the database.
1092Depending on the policy setting association requests from the
1093specified station will be allowed or denied.
1094.It Cm mac:allow
1095Set the ACL policy to permit association only by
1096stations registered in the database.
1097.It Cm mac:del Ar address
1098Delete the specified MAC address from the database.
1099.It Cm mac:deny
1100Set the ACL policy to deny association only by
1101stations registered in the database.
1102.It Cm mac:kick Ar address
1103Force the specified station to be deauthenticated.
1104This typically is done to block a station after updating the
1105address database.
1106.It Cm mac:open
1107Set the ACL policy to allow all stations to associate.
1108.It Cm mac:flush
1109Delete all entries in the database.
1110.El
1111.Pp
1112The following parameters are for compatibility with other systems:
1113.Bl -tag -width indent
1114.It Cm nwid Ar ssid
1115Another name for the
1116.Cm ssid
1117parameter.
1118Included for
1119.Nx
1120compatibility.
1121.It Cm station Ar name
1122Another name for the
1123.Cm stationname
1124parameter.
1125Included for
1126.Bsx
1127compatibility.
984263bc
MD
1128.It Cm wep
1129Another way of saying
1130.Cm wepmode on .
1131Included for
1132.Bsx
1133compatibility.
1134.It Fl wep
1135Another way of saying
1136.Cm wepmode off .
1137Included for
1138.Bsx
1139compatibility.
1140.It Cm nwkey key
1141Another way of saying:
984263bc 1142.Dq Li "wepmode on weptxkey 1 wepkey 1:key wepkey 2:- wepkey 3:- wepkey 4:-" .
984263bc
MD
1143Included for
1144.Nx
1145compatibility.
1146.It Cm nwkey Xo
1147.Sm off
1148.Ar n : k1 , k2 , k3 , k4
1149.Sm on
1150.Xc
1151Another way of saying
984263bc 1152.Dq Li "wepmode on weptxkey n wepkey 1:k1 wepkey 2:k2 wepkey 3:k3 wepkey 4:k4" .
984263bc
MD
1153Included for
1154.Nx
1155compatibility.
1156.It Fl nwkey
1157Another way of saying
1158.Cm wepmode off .
984263bc
MD
1159Included for
1160.Nx
1161compatibility.
55fc9f88
SZ
1162.El
1163.Pp
1164The following parameters are specific to bridge interfaces:
1165.Bl -tag -width indent
1166.It Cm addm Ar interface
1167Add the interface named by
1168.Ar interface
1169as a member of the bridge.
1170The interface is put into promiscuous mode
1171so that it can receive every packet sent on the network.
1172.It Cm deletem Ar interface
1173Remove the interface named by
1174.Ar interface
1175from the bridge.
1176Promiscuous mode is disabled on the interface when
1177it is removed from the bridge.
1178.It Cm maxaddr Ar size
1179Set the size of the bridge address cache to
1180.Ar size .
1181The default is 100 entries.
1182.It Cm timeout Ar seconds
1183Set the timeout of address cache entries to
1184.Ar seconds
1185seconds.
1186If
1187.Ar seconds
1188is zero, then address cache entries will not be expired.
1189The default is 240 seconds.
1190.It Cm addr
1191Display the addresses that have been learned by the bridge.
1192.It Cm static Ar interface-name Ar address
1193Add a static entry into the address cache pointing to
1194.Ar interface-name .
1195Static entries are never aged out of the cache or re-placed, even if the
1196address is seen on a different interface.
1197.It Cm deladdr Ar address
1198Delete
1199.Ar address
1200from the address cache.
1201.It Cm flush
1202Delete all dynamically-learned addresses from the address cache.
1203.It Cm flushall
1204Delete all addresses, including static addresses, from the address cache.
1205.It Cm discover Ar interface
1206Mark an interface as a
1207.Dq discovering
1208interface.
1209When the bridge has no address cache entry
1210(either dynamic or static)
1211for the destination address of a packet,
1212the bridge will forward the packet to all
1213member interfaces marked as
1214.Dq discovering .
1215This is the default for all interfaces added to a bridge.
b16c423b 1216.It Fl discover Ar interface
55fc9f88
SZ
1217Clear the
1218.Dq discovering
1219attribute on a member interface.
1220For packets without the
1221.Dq discovering
1222attribute, the only packets forwarded on the interface are broadcast
1223or multicast packets and packets for which the destination address
1224is known to be on the interface's segment.
1225.It Cm learn Ar interface
1226Mark an interface as a
1227.Dq learning
1228interface.
1229When a packet arrives on such an interface, the source
1230address of the packet is entered into the address cache as being a
1231destination address on the interface's segment.
1232This is the default for all interfaces added to a bridge.
b16c423b 1233.It Fl learn Ar interface
55fc9f88
SZ
1234Clear the
1235.Dq learning
1236attribute on a member interface.
b16c423b
SW
1237.It Cm span Ar interface
1238Add the interface named by
1239.Ar interface
1240as a span port on the bridge.
1241Span ports transmit a copy of every frame received by the bridge.
1242This is most useful for snooping a bridged network passively on
1243another host connected to one of the span ports of the bridge.
1244.It Fl span Ar interface
1245Delete the interface named by
1246.Ar interface
1247from the list of span ports of the bridge.
55fc9f88
SZ
1248.It Cm stp Ar interface
1249Enable Spanning Tree protocol on
1250.Ar interface .
1251The
1252.Xr bridge 4
1253driver has support for the IEEE 802.1D Spanning Tree protocol (STP).
1254Spanning Tree is used to detect and remove loops in a network topology.
b16c423b 1255.It Fl stp Ar interface
55fc9f88
SZ
1256Disable Spanning Tree protocol on
1257.Ar interface .
1258This is the default for all interfaces added to a bridge.
1259.It Cm maxage Ar seconds
1260Set the time that a Spanning Tree protocol configuration is valid.
1261The default is 20 seconds.
1262The minimum is 1 second and the maximum is 255 seconds.
1263.It Cm fwddelay Ar seconds
1264Set the time that must pass before an interface begins forwarding
1265packets when Spanning Tree is enabled.
1266The default is 15 seconds.
1267The minimum is 1 second and the maximum is 255 seconds.
1268.It Cm hellotime Ar seconds
1269Set the time between broadcasting of Spanning Tree protocol
1270configuration messages.
1271The default is 2 seconds.
1272The minimum is 1 second and the maximum is 255 seconds.
1273.It Cm priority Ar value
1274Set the bridge priority for Spanning Tree.
1275The default is 32768.
1276The minimum is 0 and the maximum is 65536.
1277.It Cm ifpriority Ar interface Ar value
1278Set the Spanning Tree priority of
1279.Ar interface
1280to
1281.Ar value .
1282The default is 128.
1283The minimum is 0 and the maximum is 255.
1284.It Cm ifpathcost Ar interface Ar value
1285Set the Spanning Tree path cost of
1286.Ar interface
1287to
1288.Ar value .
1289The default is 55.
1290The minimum is 0 and the maximum is 65535.
984263bc
MD
1291.El
1292.Pp
b16c423b
SW
1293The following parameters are specific to IP tunnel interfaces,
1294.Xr gif 4 :
1295.Bl -tag -width indent
1296.It Cm tunnel Ar src_addr dest_addr
1297Configure the physical source and destination address for IP tunnel
1298interfaces.
1299The arguments
1300.Ar src_addr
1301and
1302.Ar dest_addr
1303are interpreted as the outer source/destination for the encapsulating
1304IPv4/IPv6 header.
1305.It Fl tunnel
1306Unconfigure the physical source and destination address for IP tunnel
1307interfaces previously configured with
1308.Cm tunnel .
1309.It Cm deletetunnel
1310Another name for the
1311.Fl tunnel
1312parameter.
1313.El
1314.Pp
1315The following parameters are specific to
1316.Xr vlan 4
1317interfaces:
1318.Bl -tag -width indent
1319.It Cm vlan Ar vlan_tag
1320Set the VLAN tag value to
1321.Ar vlan_tag .
1322This value is a 16-bit number which is used to create an 802.1Q
1323VLAN header for packets sent from the
1324.Xr vlan 4
1325interface.
1326Note that
1327.Cm vlan
1328and
1329.Cm vlandev
1330must both be set at the same time.
1331.It Cm vlandev Ar iface
1332Associate the physical interface
1333.Ar iface
1334with a
1335.Xr vlan 4
1336interface.
1337Packets transmitted through the
1338.Xr vlan 4
1339interface will be
1340diverted to the specified physical interface
1341.Ar iface
1342with 802.1Q VLAN encapsulation.
1343Packets with 802.1Q encapsulation received
1344by the parent interface with the correct VLAN tag will be diverted to
1345the associated
1346.Xr vlan 4
1347pseudo-interface.
1348The
1349.Xr vlan 4
1350interface is assigned a
1351copy of the parent interface's flags and the parent's ethernet address.
1352The
1353.Cm vlandev
1354and
1355.Cm vlan
1356must both be set at the same time.
1357If the
1358.Xr vlan 4
1359interface already has
1360a physical interface associated with it, this command will fail.
1361To
1362change the association to another physical interface, the existing
1363association must be cleared first.
1364.Pp
1365Note: if the hardware tagging capability
1366is set on the parent interface, the
1367.Xr vlan 4
1368pseudo
1369interface's behavior changes:
1370the
1371.Xr vlan 4
1372interface recognizes that the
1373parent interface supports insertion and extraction of VLAN tags on its
1374own (usually in firmware) and that it should pass packets to and from
1375the parent unaltered.
1376.It Fl vlandev Op Ar iface
1377If the driver is a
1378.Xr vlan 4
1379pseudo device, disassociate the parent interface from it.
1380This breaks the link between the
1381.Xr vlan 4
1382interface and its parent,
1383clears its VLAN tag, flags and its link address and shuts the interface down.
1384The
1385.Ar iface
1386argument is useless and hence deprecated.
1387.El
1388.Pp
984263bc
MD
1389The
1390.Nm
1391utility displays the current configuration for a network interface
1392when no optional parameters are supplied.
1393If a protocol family is specified,
1394.Nm
1395will report only the details specific to that protocol family.
1396.Pp
984263bc
MD
1397If the
1398.Fl m
1399flag is passed before an interface name,
1400.Nm
b50e4759 1401will display the capability list and all
984263bc
MD
1402of the supported media for the specified interface.
1403If
1404.Fl L
1405flag is supplied, address lifetime is displayed for IPv6 addresses,
1406as time offset string.
1407.Pp
1408Optionally, the
1409.Fl a
1410flag may be used instead of an interface name.
1411This flag instructs
1412.Nm
1413to display information about all interfaces in the system.
1414The
1415.Fl d
1416flag limits this to interfaces that are down, and
1417.Fl u
1418limits this to interfaces that are up.
1419When no arguments are given,
1420.Fl a
1421is implied.
1422.Pp
1423The
1424.Fl l
1425flag may be used to list all available interfaces on the system, with
1426no other additional information.
1427Use of this flag is mutually exclusive
1428with all other flags and commands, except for
1429.Fl d
1430(only list interfaces that are down)
1431and
1432.Fl u
1433(only list interfaces that are up).
1434.Pp
1435The
55fc9f88
SZ
1436.Fl v
1437flag may be used to get more verbose status for an interface.
1438.Pp
1439The
984263bc
MD
1440.Fl C
1441flag may be used to list all of the interface cloners available on
1442the system, with no additional information.
1443Use of this flag is mutually exclusive with all other flags and commands.
1444.Pp
55fc9f88
SZ
1445The
1446.Fl k
1447flag causes keying information for the interface, if available, to be
1448printed.
1449For example, the values of 802.11 WEP keys will be printed, if accessible to
1450the current user.
1451This information is not printed by default, as it may be considered
1452sensitive.
1453.Pp
984263bc 1454Only the super-user may modify the configuration of a network interface.
984263bc
MD
1455.Sh DIAGNOSTICS
1456Messages indicating the specified interface does not exist, the
1457requested address is unknown, or the user is not privileged and
1458tried to alter an interface's configuration.
984263bc
MD
1459.Sh SEE ALSO
1460.Xr netstat 1 ,
b16c423b 1461.Xr ifmedia 4 ,
984263bc 1462.Xr netintro 4 ,
b16c423b 1463.Xr polling 4 ,
b50e4759 1464.Xr vlan 4 ,
984263bc
MD
1465.\" .Xr eon 5 ,
1466.Xr rc 8 ,
b50e4759
MD
1467.Xr routed 8 ,
1468.Xr sysctl 8
984263bc
MD
1469.Sh HISTORY
1470The
1471.Nm
1472utility appeared in
1473.Bx 4.2 .
d600454b
SW
1474.Sh BUGS
1475Basic IPv6 node operation requires a link-local address on each
1476interface configured for IPv6.
1477Normally, such an address is automatically configured by the
1478kernel on each interface added to the system; this behaviour may
1479be disabled by setting the sysctl MIB variable
1480.Va net.inet6.ip6.auto_linklocal
1481to 0.
1482.Pp
1483If you delete such an address using
1484.Nm ,
b16c423b 1485the kernel may act very odd.
d600454b 1486Do this at your own risk.