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Parallel Simulation and Virtual-Machine-Based Emulation of Software-Defined Networks

机译:定义网络的并行仿真和基于虚拟机的仿真

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The emerging software-defined networking (SDN) technology decouples the control plane from the data plane in a computer network with open and standardized interfaces, and hence opens up the network designers' options and ability to innovate. The wide adoption of SDN in industry has motivated the development of large-scale, high-fidelity testbeds for evaluation of systems that incorporate SDN. In this article, we develop a framework to support OpenFlow-based SDN simulation and distributed emulation, by leveraging our prior work on a hybrid network testbed with a parallel network simulator and a virtual-machine-based emulation system. We show how to exploit typical SDN controller behaviors to handle performance issues caused by the centralized controller in parallel discrete-event simulation. In particular, we develop an asynchronous synchronization algorithm for passive SDN controllers and design a two-level architecture for active SDN controllers. We evaluate the system performance, showing good scalability. Finally, we present a case study, using the testbed, to evaluate network verification applications in an SDN-based data center network.
机译:新兴的软件定义网络(SDN)技术通过开放和标准化的接口将控制平面与计算机网络中的数据平面分离,从而为网络设计人员提供了更多选择和创新能力。 SDN在工业中的广泛采用推动了大规模,高保真测试平台的发展,以评估包含SDN的系统。在本文中,我们利用先前在带有并行网络模拟器和基于虚拟机的仿真系统的混合网络测试平台上的工作,开发了一个支持基于OpenFlow的SDN仿真和分布式仿真的框架。我们展示了如何在并行离散事件仿真中利用典型的SDN控制器行为来处理由集中控制器引起的性能问题。特别是,我们为无源SDN控制器开发了一种异步同步算法,并为有源SDN控制器设计了两级体系结构。我们评估系统性能,显示出良好的可伸缩性。最后,我们提供一个使用试验台的案例研究,以评估基于SDN的数据中心网络中的网络验证应用程序。

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