Test Traffic Control Based on REST API for Software-Defined Networking

With the expansion of software-defined network deployment scale, the number of switches on the data plane is increasing, which causes many problems on the data link, like packet loss and bandwidth degradation. Due to the existence of multi-link redundancy technology in the network, network operators hardly find these problems in time. Therefore, based on REST API, this paper proposes an SDN network test traffic control method. By controlling the test traffic and using different test coverage criterions, this method can support the data plane to complete the test of switch forwarding function and data link performance with multiple SDN controllers to find possible errors in the topology. Through experiments, it is found that edge coverage test has better cost performance than vertex coverage and full coverage test, completing the coverage of data plane and improving fault discovery rate.