ALTQ drivers

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Summary

The intention of this page is to provide information regarding FreeBSD's ALTQ drivers, what they do, and how they work.

Information

The ALTQ framework is used for queuing/traffic shaping. In pfSense, this is utilized by the Shaper Wizard and the Queues/Interfaces tabs under Firewall > Traffic Shaper.

See the altq(4) or the altq(9).

On that page, select the version of FreeBSD that corresponds to the version of pfSense being run.

In addition to the drivers listed as supporting ALTQ in FreeBSD, pfSense also includes support for ALTQ on vlan(4) and IPsec enc(4) interfaces.

If the NIC being used does not support ALTQ, Limiters may be used instead.