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ALTQ(4) FreeBSD Kernel Interfaces Manual ALTQ(4)
NAME
ALTQ -- alternate queuing of network packets
SYNOPSIS
options ALTQ
options ALTQ_CBQ
options ALTQ_RED
options ALTQ_RIO
options ALTQ_HFSC
options ALTQ_CDNR
options ALTQ_PRIQ
DESCRIPTION
The ALTQ framework provides several disciplines for queuing outgoing net-
work packets. This is done by modifications to the interface packet
queues. See altq(9) for details.
The user interface for ALTQ is implemented by the pfctl(8) utility, so
please refer to the pfctl(8) and the pf.conf(5) manpages for a complete
description of the ALTQ capabilities and how to use it.
Kernel Options
The following options in the kernel configuration file are related to
ALTQ operation:
ALTQ Enable ALTQ.
ALTQ_CBQ Build the ``Class Based Queuing'' discipline.
ALTQ_RED Build the ``Random Early Detection'' extension.
ALTQ_RIO Build ``Random Early Drop'' for input and output.
ALTQ_HFSC Build the ``Hierarchical Packet Scheduler'' discipline.
ALTQ_CDNR Build the traffic conditioner. This option is meaningless at
the moment as the conditioner is not used by any of the
available disciplines or consumers.
ALTQ_PRIQ Build the ``Priority Queuing'' discipline.
ALTQ_NOPCC Required for SMP builds.
ALTQ_DEBUG Enable additional debugging facilities.
Note that ALTQ-disciplines cannot be loaded as kernel modules. In order
to use a certain discipline you have to build it into a custom kernel.
The pf(4) interface, that is required for the configuration process of
ALTQ can be loaded as a module.
SUPPORTED DEVICES
The driver modifications described in altq(9) are required to use a cer-
tain network card with ALTQ. They have been applied to the following
hardware drivers: an(4), ath(4), awi(4), bfe(4), bge(4), dc(4), de(4),
ed(4), em(4), fxp(4), hme(4), le(4), lnc(4), my(4), nve(4), re(4), rl(4),
sf(4), sis(4), sk(4), ste(4), stge(4), vr(4), wi(4), and xl(4).
The ndis(4) framework also has support for ALTQ and thus all encapsulated
drivers.
The tun(4) and ng_iface(4) pseudo drivers also do support ALTQ.
SEE ALSO
pf(4), pf.conf(5), ipfw(8), pfctl(8), altq(9)
FreeBSD 6.2 July 25, 2006 FreeBSD 6.2
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 19 20:30:43 BST 2007
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