November 2022
Intermediate to advanced
594 pages
25h 21m
English
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Chapter 14: Scheduling packets
A schedule defends from chaos and whim.
—Annie Dillard
Abstract
From arranging vacations to making appointments, we are constantly scheduling activities. A busy router is no exception. Routers must schedule the handling of routing updates, management queries, and, of course, data packets. Data packets must be scheduled in real time by the forwarding processors within each line card. This chapter concentrates on the efficient scheduling of data packets, while allowing certain classes of data packets to receive different service from other classes. Since this book concentrates on implementation bottlenecks, this chapter focuses on packet scheduling. We will briefly examine the motivation for some popular scheduling choices. ...
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