SDN网络下控制器的部署研究

发布时间：2018-06-24 03:47

本文选题：软件定义网络 + 控制器部署　；参考：《大连海事大学》2017年硕士论文

【摘要】：本文针对软件定义网络中的控制器部署进行研究,目标是对于给定任意规模的网络拓扑,找到控制器的最佳部署位置,同时针对流量的动态变化,实现控制器对网络的动态管理。对于SDN网络下控制器的最佳位置部署研究,不仅具有十分重要的理论意义,而且也具有广泛的实际应用价值。本文在分析了国内外该领域相关研究成果的基础之上,提出了 SDN网络下控制器最佳位置的部署方法。首先将网络拓扑划分成域分别考虑,针对多个域利用多层k路划分模式将一个大的网络拓扑划分成k个域,然后在每个域内根据设备节点的权值和链路中的路由开销找到控制器部署的最优位置。同时在SDN控制器部署完成的前提下,由于网络中流量动态变化的特点,提出了一种基于流的动态切换算法,保证了在某个域内控制器过载的情况下,交换机能够及时将流量切换至未过载的邻居域内,使控制器可以对网络进行动态管理。本文通过开放的北向接口,在应用层自定义5个主要模块来实现控制器部署策略,各模块分别为:拓扑分析模块、链路规划模块、控制器部署模块、网络状态监控模块以及交换机切换模块。为了验证本文所提出方法的可行性与有效性,本文采用Mininet仿真平台搭建拓扑结构,并在Floodlight控制器上加载相应模块进行仿真实验。使用Iperf打流工具模拟流量的发生,通过两组实验进行比较,并对得到的实验结果做了较为详细的分析。
[Abstract]:In this paper, the controller deployment in the software defined network is studied. The goal is to find the optimal deployment location of the controller for a given network topology of any size, and at the same time, to deal with the dynamic change of traffic. Realizes the controller to the network dynamic management. The research on optimal location deployment of controllers in SDN networks is not only of great theoretical significance, but also of extensive practical value. Based on the analysis of the research results in this field at home and abroad, this paper presents the optimal location deployment method of controllers in SDN networks. Firstly, the network topology is divided into domains, and a large network topology is divided into k domains by using multi-layer k-path partitioning mode for multiple domains. Then the optimal location of controller deployment is found in each domain according to the weight of the device node and the routing overhead in the link. At the same time, on the premise of the deployment of SDN controller, because of the dynamic change of traffic in the network, a dynamic switching algorithm based on flow is proposed, which ensures that the controller is overloaded in a certain domain. The switch can switch the traffic to the unoverloaded neighbor domain in time, so that the controller can manage the network dynamically. In this paper, through the open northward interface, the controller deployment strategy is realized by customizing five main modules in the application layer. Each module is: topology analysis module, link planning module, controller deployment module. Network state monitoring module and switch switching module. In order to verify the feasibility and effectiveness of the proposed method, this paper uses the Mininet simulation platform to build the topology structure, and loads the corresponding modules on the Floodlight controller to carry out simulation experiments. The Iperf tool is used to simulate the occurrence of flow, and the experimental results are compared by two groups of experiments, and the experimental results are analyzed in detail.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.02

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