With the addition of user-controllable computing capabilities to conventional data networks, the network can no longer be perceived as a passive conveyor of bits. It transforms into a generic computational engine or an “active network”. While such capabilities open up many exciting possibilities for network designers, simulation of such large scale high-performance networks is exacerbated by a number of issues. Issues such as scalability and expressibility, will be addressed by the simulator designer as simulation requires the designer to “implement” models of the active networks systems. This paper proposes the use of a parallel simulation (using relaxed synchronization strategies, such as Time Warp) environment to accurately simulate the behavior and profile the performance of large scale, active networks.