Chapter 15: Routers as distributed systems
Come now and let us reason together.
—Isaiah 1:18, The Bible
Abstract
As routers get faster, the delay between router components increases in importance when compared to message-transmission times. The delay across links connecting router components can also vary significantly. Finally, availability requirements make it infeasible to deal with component failures by crashing the entire router. Within a router it makes sense to use techniques developed to design reliable distributed systems. To support this thesis, this chapter considers three sample phenomena that commonly occur within most high-performance interconnect devices—flow control, striping, and asynchronous data-structure updates. In each case, ...
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