The last years have seen an increasing, albeit restricted simulation of large-scale networks on shared memory parallel platforms. As the complexity of communication protocols and the network topology increase, so does the need for high performance simulation techniques. An impediment to the widespread use of these simulations is the high coast of parallel platform. To satisfy these requirements, network designers or researchers have to use cost-effective networks of commodity processors (workstations or Pc) as computing environment. Towards this end, the solution may be to transfert implementations of parallel simulation techniques to distributed architectures ; this leads inevitably to unreliable and inefficient software. One reason, though certainly not the only one, that such risk exists is that real-time and distributed issues inherent to networks have not been incorporated into model describing actual network and its components. This paper is concerned with the use of Ada95/DSA a...