Realistic Simulation of Internet

The Internet is a complex collection of various nodes which run independently. The hardware and software of nodes are quite diverse and these elements make the complexity of the Internet. It is difficult to model these behaviors, so we proposed and implemented StarBED, a large-scale testbed using general PCs and switches. Thus we created an environment for experiment using realistic nodes and software. We also designed and implemented SpringOS, which is a supporting software for making experiments on StarBED. Using SpringOS, users can make experiments on StarBED easily. In this paper, we describe the design of StarBED, and how to make an experiment on the StarBED using SpringOS. Moreover, we describe the design of StarBED2, StarBED2 is a testbed for ubiquitous and sensor networks based on StarBED.