软件定义网络的分布式控制及上层寻址方式研究

发布时间：2018-02-14 14:17

本文关键词： 软件定义网络 kandoo 负载均衡请求控制协议　出处：《浙江工商大学》2014年硕士论文　论文类型：学位论文

【摘要】：软件定义网络(SDN)革命性地改变了现有的网络架构,提供了可编程的网络实现,且把原有的网络架构解耦为数据平面、控制平面和应用控制平面,使数据平面和控制平面分离,提高了性能和可扩展性等。同时,由于内容服务已经成为网络服务的主体,使得现有的基于IP地址的寻址方式面临巨大挑战。基于上述问题,我们通过kandoo架构以及路由协议在分布式控制平面上的实现来进一步了解SDN的控制平面,并通过引入基于内容寻址方式且可完全部署在SDN框架下的内容中心网络(CCN),来研究应用平面上的一个新的变革思想。首先介绍kandoo架构,它改变了传统的单一控制单元控制平面,变为由多个控制器单元分布式互联来形成多控制单元的控制平面架构,介绍了该架构思想及相关实施细节。又根据本地控制器处理本区域内频繁事件,使相关任务下放该区域内完成这一特性,引入负载均衡机制,提出基于最小优先策略的加权轮询算法来进一步优化本地控制器的这一功能,提高控制器处理负载的能力。然后分析分布式路由协议在多控制单元控制平面内怎样高效实现。我们受路由控制平台(RCP)架构中控制器的功能模块划分思想的启发,把它进一步扩展到kandoo架构的两层控制器中,并把其路由功能放在单个AS自治系统下研究,分析BGP与OSPF协议在分布式控制平面上的实现,并提出了提高根控制器计算路由信息能力以及本地控制器卸载根控制器负载压力的几点方法。最后对CCN中的请求控制协议ICP的最新研究进展进行汇总,介绍了ICP协议的各分过程,如请求包发送,链路上带宽共享传输,路由节点共享存储和过滤过程。并对这些过程的模型化进行了概括,然后对这些过程模型的合理性和准确性进行评价分析,给出了ICP协议的研究趋势。
[Abstract]:Software defined Network (SDN) revolutionizes the existing network architecture, provides programmable network implementation, decouples the original network architecture into a data plane, a control plane and an application control plane, and separates the data plane from the control plane. At the same time, since content service has become the main body of network services, the existing addressing methods based on IP address are faced with great challenges. Through the implementation of kandoo architecture and routing protocol on the distributed control plane, we can further understand the control plane of SDN. A new idea of change in application plane is studied by introducing the content-based addressing method which can be completely deployed in the framework of SDN. This paper first introduces the kandoo architecture, which changes the traditional control plane of single control unit, and becomes the control plane architecture of multiple control units by distributed interconnection of multiple controller units. The architecture idea and related implementation details are introduced. According to the local controller to deal with frequent events in the region, the related tasks are decentralized to complete this feature in the region, and load balancing mechanism is introduced. A weighted polling algorithm based on minimum priority strategy is proposed to further optimize the function of the local controller and improve the controller's ability to handle the load. Then we analyze how to implement the distributed routing protocol efficiently in the multi-control unit control plane. We are inspired by the idea of functional module partition of the controller in the RCP-based routing control platform. It is further extended to the two-layer controller of kandoo architecture, and its routing function is studied under a single as autonomous system. The implementation of BGP and OSPF protocols on the distributed control plane is analyzed. Several methods to improve the ability of calculating routing information of the root controller and the load pressure of the local controller to unload the root controller are put forward. Finally, the latest research progress of request control protocol (ICP) in CCN is summarized, and each process of ICP protocol, such as request packet sending, bandwidth sharing transmission on link, is introduced. The routing nodes share storage and filtering processes, and the modeling of these processes is summarized, then the rationality and accuracy of these process models are evaluated and analyzed, and the research trend of ICP protocol is given.
【学位授予单位】：浙江工商大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02

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