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The Book of PF, 2nd Edition by Peter N.M. Hansteen

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Chapter 7. Queues, Shaping, and Redundancy

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This chapter deals with two main topics, which taken separately or together have the potential to radically transform your networking experience. The common theme in this chapter is managing resource availability.

In the first part of the chapter, we look at how to use the ALTQ traffic-shaping subsystem to allocate bandwidth resources efficiently and according to a specified policy. The second part of the chapter explores how to make sure your resources stay available by using the redundancy features offered by the CARP and pfsync protocols.

Directing Traffic with ALTQ

ALTQ, short for ALTernate Queueing, is ...

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