Mastering (virtual) networks:A case study of virtualizing internet lab*

In this paper we describe a single-server-based system we developed for a large scale networking laboratory. The system, based on virtual machines, is capable of running many concurrent virtual networks, each consist'ing of PCs, routers and switches, that can be connected in various configurations. Lab users can initiate and switch lab experiments with a simple web-based interface and remotely access each of the network devices for configuration and measurements, therefore, users can perform the lab either in a 30 students lab session with a TA or from home at their convenience. In addition, administration tools are simple and most failures can be recovered using a web interface. This cost effective system is based on Linux and other open-source/freeware software and was proven to be very effective in practice in the last two years.