THE MEASUREMENT MECHANISM BETWEEN DIFFERENT SDN DOMAINS

• 1、School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Abstract：Software-Defined Network (SDN) takes advantage of its logically centralized control plane to collect network state information, and makes use of these status information to manage and control network through controller, this feature provides network control and management much flexibility, but it may also bring a highly complex problem which will restrict the SDN network technology innovation, that is, the underlying network behavior will become unknown to certain extent. Faced with various problems in the process of SDN technological innovation, a fast and accurate SDN measurement is still the most important demand of researchers. In traditional networks, network managers can take advantage of many different types of network measurement tools to measure various network state information. In contrast, measurement in SDN network is not easy, few SDN network measurement killer tool can be found. Moreover, current research of SDN network measurement mostly focus on the study of the mechanism for measuring traditional network state parameters, and lack research on mechanism for measuring the forwarding path of network traffic. Compared with the traditional network measurement technology, this paper introduces some SDN network measurement technology based on OpenFlow protocol API and proposes a measurement mechanism. That is, measuring the forwarding path of the production traffic between different SDN domains by sending probes into the network from the SDN controller.

Keywords： network measurement SDN OpenFlow active measurement forwarding path