224 lines
4.8 KiB
Groff
224 lines
4.8 KiB
Groff
.\"
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.\" Copyright (c) 2004 Max Laier <mlaier@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 9, 2019
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.Dt ALTQ 4
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.Os
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.Sh NAME
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.Nm ALTQ
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.Nd "alternate queuing of network packets"
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.Sh SYNOPSIS
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.Cd options ALTQ
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.Pp
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.Cd options ALTQ_CBQ
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.Cd options ALTQ_CODEL
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.Cd options ALTQ_RED
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.Cd options ALTQ_RIO
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.Cd options ALTQ_HFSC
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.Cd options ALTQ_CDNR
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.Cd options ALTQ_PRIQ
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.Cd options ALTQ_FAIRQ
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.Sh DESCRIPTION
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The
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.Nm
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system is a framework which provides several disciplines for queuing outgoing
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network packets.
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This is done by modifications to the interface packet queues.
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See
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.Xr altq 9
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for details.
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.Pp
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The user interface for
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.Nm
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is implemented by the
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.Xr pfctl 8
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utility, so please refer to the
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.Xr pfctl 8
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and the
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.Xr pf.conf 5
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man pages for a complete description of the
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.Nm
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capabilities and how to use it.
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.Ss Kernel Options
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The following options in the kernel configuration file are related to
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.Nm
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operation:
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.Pp
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.Bl -tag -width ".Dv ALTQ_DEBUG" -compact
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.It Dv ALTQ
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Enable
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.Nm .
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.It Dv ALTQ_CBQ
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Build the
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.Dq "Class Based Queuing"
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discipline.
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.It Dv ALTQ_CODEL
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Build the
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.Dq "Controlled Delay"
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discipline.
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.It Dv ALTQ_RED
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Build the
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.Dq "Random Early Detection"
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extension.
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.It Dv ALTQ_RIO
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Build
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.Dq "Random Early Drop"
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for input and output.
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.It Dv ALTQ_HFSC
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Build the
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.Dq "Hierarchical Packet Scheduler"
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discipline.
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.It Dv ALTQ_CDNR
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Build the traffic conditioner.
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This option is meaningless at the moment as the conditioner is not used by
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any of the available disciplines or consumers.
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.It Dv ALTQ_PRIQ
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Build the
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.Dq "Priority Queuing"
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discipline.
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.It Dv ALTQ_FAIRQ
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Build the
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.Dq "Fair Queuing"
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discipline.
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.It Dv ALTQ_NOPCC
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Required if the TSC is unusable.
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.It Dv ALTQ_DEBUG
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Enable additional debugging facilities.
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.El
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.Pp
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Note that
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.Nm Ns -disciplines
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cannot be loaded as kernel modules.
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In order to use a certain discipline you have to build it into a custom
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kernel.
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The
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.Xr pf 4
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interface, that is required for the configuration process of
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.Nm
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can be loaded as a module.
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.Sh SUPPORTED DEVICES
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The driver modifications described in
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.Xr altq 9
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are required to use a certain network card with
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.Nm .
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They have been applied to the following hardware drivers:
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.Xr ae 4 ,
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.Xr age 4 ,
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.Xr alc 4 ,
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.Xr ale 4 ,
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.Xr an 4 ,
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.Xr aue 4 ,
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.Xr axe 4 ,
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.Xr bce 4 ,
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.Xr bfe 4 ,
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.Xr bge 4 ,
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.Xr bxe 4 ,
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.Xr cas 4 ,
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.Xr cxgbe 4 ,
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.Xr dc 4 ,
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.Xr de 4 ,
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.Xr ed 4 ,
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.Xr em 4 ,
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.Xr ep 4 ,
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.Xr epair 4 ,
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.Xr et 4 ,
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.Xr fxp 4 ,
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.Xr gem 4 ,
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.Xr hme 4 ,
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.Xr igb 4 ,
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.Xr ixgbe 4 ,
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.Xr jme 4 ,
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.Xr le 4 ,
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.Xr liquidio 4 ,
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.Xr msk 4 ,
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.Xr mxge 4 ,
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.Xr my 4 ,
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.Xr nfe 4 ,
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.Xr nge 4 ,
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.Xr npe 4 ,
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.Xr qlxgb 4 ,
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.Xr re 4 ,
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.Xr rl 4 ,
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.Xr sf 4 ,
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.Xr sge 4 ,
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.Xr sis 4 ,
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.Xr sk 4 ,
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.Xr ste 4 ,
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.Xr stge 4 ,
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.Xr ti 4 ,
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.Xr txp 4 ,
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.Xr udav 4 ,
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.Xr vge 4 ,
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.Xr vr 4 ,
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.Xr vte 4 ,
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and
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.Xr xl 4 .
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.Pp
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The
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.Xr ndis 4
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framework also has support for
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.Nm
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and thus all encapsulated drivers.
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.Pp
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The
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.Xr tun 4
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and
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.Xr ng_iface 4
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pseudo drivers also do support
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.Nm .
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.Pp
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The
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.Xr vlan 4
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driver does not directly support
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.Nm ,
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but as packets (mbufs) are passed to the underlying interface, a queue
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can be defined for the underlying interface, and any packets directed
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to the queue will be processed at the interface level.
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An example:
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.Pp
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.Bd -literal -offset indent
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altq on igb0 cbq queue { def aq }
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queue def bandwidth 90% cbq (default borrow)
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queue aq bandwidth 10Mb cbq
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pass in on igb0.10 proto udp all queue aq keep state
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.Ed
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.Sh SEE ALSO
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.Xr pf 4 ,
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.Xr pf.conf 5 ,
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.Xr ipfw 8 ,
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.Xr pfctl 8 ,
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.Xr altq 9
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.Sh HISTORY
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The
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.Nm
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system first appeared in March 1997 and found home in the KAME project
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(http://www.kame.net).
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It was imported to
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.Fx
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in 5.3 .
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