Abstract: For each system simulation platform, flexible and elastic computing power and network topology are required. Therefore, cloud computing combined with SDN software-defined networking technology has great practicability for the building of all kinds of system simulation platforms. This paper compares and analyzes three schemes implemented by SDN for the cloud computing based simulation system platform. According to the actual situation and requirements, the software scheme is the most suitable. Based on this conclusion, this paper presents a scheme of simulation system implemented by software SDN, which can guide the building of simulation system SDN.

Key words: cloud computing, SDN, software-defined networking, system simulation platform, network technology, data center

摘要： 在各系统仿真平台中，需要灵活可变、高弹性的计算能力与网络拓扑，因此云计算结合SDN软件定义网络技术，对于构建各类系统仿真平台，有着非常大的实用性。基于云计算的仿真系统平台，在SDN实现的3种方案中进行比较和分析，根据实际情况和需要，比选得出软件方案最为适合的结论。在此结论下，给出一种软件SDN实现仿真系统的方案，可以指导仿真系统SDN的构建。

关键词: 云计算, SDN, 软件定义网络, 系统仿真平台, 网络技术, 数据中心