SDN接口技术研究与应用

发布时间：2018-04-21 08:53

本文选题：软件定义网络(SDN) + 北向接口　；参考：《南京邮电大学》2017年硕士论文

【摘要】：软件定义网络(software-defined networking,简称SDN)是一种新型的网络架构,与传统网络不同,SDN将数据平面与控制平面解耦,将控制功能集中到了控制器中,网络设备在控制器的指导下完成数据转发。SDN分为应用层、控制层和数据层。SDN的出现满足了网络服务发展的需求,与传统网络相比,SDN能够更好的实现服务定制。其北向接口可以使得上层应用更好的调用相关模块实现更多样化的功能,南向接口OpenFlow则是通过控制器向交换机发出控制信息。本文综合研究了国内外关于软件定义网络,南向接口,北向接口以及Ryu控制器的相关文献,并且详细研究了南向接口OpenFlow协议的相关核心技术,在此基础上,通过南向接口OpenFlow实现了流量监测模块与带宽保障模块以及最短路径转发等相关的功能,北向接口则用于获取相关链路上的设备信息等情况,同时也可通过北向接口进行流表的相关操作。本文综合了以上多种技术,提出了服务定制应用的设计方案,并依照该方案进行了各功能模块的实现,使用控制器和OF交换机之间消息,来进行流量感知,同时根据测量的结果,通过获取的拓扑信息与链路情况,来进行路由选择,对于类似于家庭用户的带宽需求,可以进行带宽保障,用户可以通过SDN的北向接口对网络资源进行编排以定制出满足自身需求的服务。为此,结合实际应用场景,制定了服务定制应用设计方案,并实现了基于SDN的服务定制应用。将所提出的设计应用置于实际SDN网络环境中并进行了测试验证。测试结果表明,该应用可较好的实现服务定制功能,满足用户对网络能力的不同需求。
[Abstract]:Software-defined networking (SDN) is a new network architecture, which decouples the data plane from the control plane and centralizes the control function into the controller, which is different from the traditional network. Network equipment under the guidance of the controller to complete data forwarding. SDN is divided into application layer, the emergence of control layer and data layer. SDN meets the needs of the development of network services, compared with the traditional network SDN can better achieve service customization. The north interface can make the upper layer application call the related module better to achieve a more diversified function, and the southern interface OpenFlow sends out the control information to the switch through the controller. This paper synthetically studies the related literature of software definition network, south interface, north interface and Ryu controller, and studies the core technology of OpenFlow protocol in detail, on the basis of which, the software definition network, the south interface, the north interface and the Ryu controller are discussed in detail. The function of flow monitoring module and bandwidth guarantee module and shortest path forwarding are realized by OpenFlow, while the north interface is used to obtain equipment information on relevant links. At the same time, the flow table can also be operated through the north interface. This paper synthesizes the above technologies, proposes the design scheme of the service customization application, and carries on the realization of each function module according to this scheme, uses the message between the controller and the of switch to carry on the traffic perception, At the same time, according to the results of the measurement, through the obtained topology information and the link situation, to carry on the route choice, for the bandwidth requirement similar to the home user, may carry on the bandwidth safeguard, Users can orchestrate network resources through SDN's northward interface to customize the services to meet their needs. Based on the practical application scenario, the design scheme of service customization application is developed, and the service customization application based on SDN is realized. The proposed design is put into the actual SDN network environment and tested. The test results show that the application can realize the service customization function well and meet the different needs of users for network capability.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.02

【参考文献】