  Simulation is widely adopted in the study of modern computer networks. In
this context, OMNeT++ provides a set of very effective tools that span from the
definition of the network, to the automation of simulation execution and quick
result representation. However, as network models become more and more complex
to cope with the evolution of network systems, the amount of simulation
factors, the number of simulated nodes and the size of results grow
consequently, leading to simulations with larger scale. In this work, we
perform a critical analysis of the tools provided by OMNeT++ in case of such
large-scale simulations. We then propose a unified and flexible software
architecture to support simulation automation.
