As network transmission speeds increase, packet streams increasingly uncover fine details of the interior behavior of router hardware and software. This behavior reveals itself as a set of harmonic effects, as interior clocks periodically interrupt packet forwarding, and interior queues periodically empty and fill. We examine this behavior with a Linux-based router employing a variety of gigabit Ethernet interfaces, with a view toward two goals: the creation of harmonic models of router forwarding performance which are accurate and yet mathematically simple and fast; and the analysis of the potential for an undesirable succession of positively reinforcing router reverberations.
PAM2004 - The 5th Passive and Active Measurement Workshop
harmonic, measurement, modeling, network