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1.\"
2.\" Copyright (c) 2004 Max Laier <mlaier@FreeBSD.org>
3.\" All rights reserved.
4.\"
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26.\" $FreeBSD: head/share/man/man4/altq.4 158615 2006-05-15 20:16:42Z marius $
27.\"
28.Dd May 15, 2006
29.Dt ALTQ 4
30.Os
31.Sh NAME
32.Nm ALTQ
33.Nd "alternate queuing of network packets"
34.Sh SYNOPSIS
35.Cd options ALTQ
36.Pp
37.Cd options ALTQ_CBQ
38.Cd options ALTQ_RED
39.Cd options ALTQ_RIO
40.Cd options ALTQ_HFSC
41.Cd options ALTQ_CDNR
42.Cd options ALTQ_PRIQ
43.Sh DESCRIPTION
44The
45.Nm
46framework provides several disciplines for queuing outgoing network packets.
47This is done by modifications to the interface packet queues.
48See
49.Xr altq 9
50for details.
51.Pp
52The user interface for
53.Nm
54is implemented by the
55.Xr pfctl 8
56utility, so please refer to the
57.Xr pfctl 8
58and the
59.Xr pf.conf 5
60manpages for a complete description of the
61.Nm
62capabilities and how to use it.
63.Ss Kernel Options
64The following options in the kernel configuration file are related to
65.Nm
66operation:
67.Pp
68.Bl -tag -width ".Dv ALTQ_DEBUG" -compact
69.It Dv ALTQ
70Enable
71.Nm .
72.It Dv ALTQ_CBQ
73Build the
74.Dq "Class Based Queuing"
75discipline.
76.It Dv ALTQ_RED
77Build the
78.Dq "Random Early Detection"
79extension.
80.It Dv ALTQ_RIO
81Build
82.Dq "Random Early Drop"
83for input and output.
84.It Dv ALTQ_HFSC
85Build the
86.Dq "Hierarchical Packet Scheduler"
87discipline.
88.It Dv ALTQ_CDNR
89Build the traffic conditioner.
90This option is meaningless at the moment as the conditioner is not used by
91any of the available disciplines or consumers.
92.It Dv ALTQ_PRIQ
93Build the
94.Dq "Priority Queuing"
95discipline.
96.It Dv ALTQ_NOPCC
97Required if the TSC is unusable.
98.It Dv ALTQ_DEBUG
99Enable additional debugging facilities.
100.El
101.Pp
102Note that
103.Nm Ns -disciplines
104cannot be loaded as kernel modules.
105In order to use a certain discipline you have to build it into a custom
106kernel.
107The
108.Xr pf 4
109interface, that is required for the configuration process of
110.Nm
111can be loaded as a module.
112.Sh SUPPORTED DEVICES
113The driver modifications described in
114.Xr altq 9
115are required to use a certain network card with
116.Nm .
117They have been applied to the following hardware drivers:
118.Xr an 4 ,
119.Xr ath 4 ,
120.Xr awi 4 ,
121.Xr bfe 4 ,
122.Xr bge 4 ,
123.Xr dc 4 ,
124.Xr de 4 ,
125.Xr ed 4 ,
126.Xr em 4 ,
127.Xr fxp 4 ,
128.Xr hme 4 ,
129.Xr le 4 ,
130.Xr re 4 ,
131.Xr rl 4 ,
132.Xr sf 4 ,
133.Xr sis 4 ,
134.Xr sk 4 ,
135.Xr ste 4 ,
136.Xr vr 4 ,
137.Xr wi 4 ,
138and
139.Xr xl 4 .
140.Pp
141The
142.Xr ndis 4
143framework also has support for
144.Nm
145and thus all encapsulated drivers.
146.Pp
147The
148.Xr tun 4
149and
150.Xr ng_iface 4
151pseudo drivers also do support
152.Nm .
153.Sh SEE ALSO
154.Xr pf 4 ,
155.Xr pf.conf 5 ,
156.Xr ipfw 8 ,
157.Xr pfctl 8 ,
158.Xr altq 9