SIMULATION OF PACKET DATA NETWORKS USING OPNET
In this paper we describe the use of the OPNET simulation tool for modeling and analysis of packet data networks. We simulate two types of high-performance networks: Fiber Distributed Data Interface and Asynchronous Transfer Mode. We examine the performance of the FDDI protocol by varying network parameters in two network configurations. We also model a simple ATM network and measure its performance under various ATM service categories.Finally, we develop an OPNET process model for leaky bucket congestion control algorithm. We examine its performance and its effect on the traffic patterns (loss and burst size) in an ATM network.