Date Added: Nov 2011
In the real Internet, various types of problems are encountered. Before integrating new technologies into the Internet, developers should understand the behavior of these technologies in the event of fault occurrence. Researchers conduct experiments on network testbeds to evaluate new technologies, but the main focus of the evaluations done so far has been to study the technologies' behavior in healthy situations. Currently, there are many network testbeds available. The authors developed and currently operate StarBED, an actual node-based network testbed. In this paper, they discuss methodologies to introduce faults into an experimental environment using an actual node-based network testbed. Then, they show two case studies of fault injection into their experimental environments on StarBED.