Rao, S.In this short report we briefly discuss the results of various preliminary simulation runs which we have performed with the OPNET simulator of the ALAX. These results provide a range estimate on the size of various buffers as well as a rough idea of the trade-offs which are involved between the processor and switching speed, and buffer sizes. In order to allow the simulations to stabilize quickly in this initial set of simulation runs the source used was a simple process with an embedded two-state Markov chain. More complex source models are described in a companion report.<P> <BR>en-USCSPS simulator modelsIntelligent Signal ProcessingCommunications SystemsTechnical Report