ALTQ(4) 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 de- scription 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 avail- able 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 certain network card with ALTQ. They have been applied to the following hardware drivers: an(4), ath(4), awi(4), bfe(4), dc(4), de(4), ed(4), em(4), fxp(4), hme(4), lnc(4), re(4), rl(4), sf(4), sis(4), sk(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) pseudo driver also does support ALTQ and includes the required modifications. SEE ALSO pf(4), pf.conf(5), ipfw(8), pfctl(8), altq(9) FreeBSD 5.4 March 12, 2005 ALTQ(4)
NAME | SYNOPSIS | DESCRIPTION | SUPPORTED DEVICES | SEE ALSO
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