NAME
altq —
alternate queuing framework
SYNOPSIS
options ALTQ
options ALTQ_BLUE
options ALTQ_CBQ
options ALTQ_CDNR
options ALTQ_FIFOQ
options ALTQ_FLOWVALVE
options ALTQ_HFSC
options ALTQ_LOCALQ
options ALTQ_PRIQ
options ALTQ_RED
options ALTQ_RIO
options ALTQ_WFQ
DESCRIPTION
Thealtq system is a framework which provides several
disciplines for queuing outgoing network packets. While traffic shaping is
perhaps the most prominent example, altq provides also
other measures related to QoS. The framework has been integrated to the
pf(4)
packet filter since NetBSD 4.0.
At the implementation level altq modifies
the interface packet queues. Therefore the driver modifications described in
altq(9) are required in order to use a certain network card with
altq.
FILES
/dev/altq
SEE ALSO
pf(4), altq.conf(5), altqd(8), altq(9)
Kenjiro Cho, Fitting theory into reality in the ALTQ case, http://www.sonycsl.co.jp/person/kjc/papers/fittingtheory.pdf, Taipei, Taiwan, March, 2004, Asia BSD conference.
HISTORY
The altq system first appeared in March
1997 and found its home in the KAME project
(http://www.kame.net). It was
imported into NetBSD 1.6.
CAVEATS
Please note that you must compile
pf(4)
in the kernel, using the PF
module(7) alongside altq built in the kernel
will not work.