Abstract
Software-Defined networking has received more and more attentation recently, lots of routing algorithms have been proposed. For evaluating the performace of a routing algorithm becomes a important issue. Although Using real OpenFlow switch for constructing a software-defined networking is quite real, the cost for building is vrey high. The network testbed is another way for build software-defined networking. The network testbed is usually created by some organizations or enterprises. It offers the compute and network resources for the researchers. Also, it offers a platform for the researchers to operate and build the experimental environment they wnat. Because the compute and network resources are shared by other researchers, the cost is lower compared to building by real machines. Also, the result of the experiment is more persuasive than testing by some simulators.