Self-similar traffic models have permitted a more realistic description of the network devices behavior. However, the derivation of analytical results turns out to be a very demanding task, also in the single-server case. For the work-conserving switching architectures the characterization of the quality of service (QoS) parameters is even more complicated due to the correlation among the queues, induced by the scheduling policies. In this paper we present a detailed study, based on simulations of some paradigmatic scheduling disciplines, performed with an aim to furnish some useful tools for the design of high-speed network devices.