基于高可用的SDN网络控制层部署问题研究

发布时间：2018-06-27 09:16

本文选题：SDN + 控制器位置部署　；参考：《浙江工商大学》2014年硕士论文

【摘要】：软件定义网络(Software-Defined Network,SDN)作为一种新型的网络架构,正以非常强势的力量构筑着现代网络。它不仅可以提高网络设备的运维效率,解放IT人员的工作时间,更能够让网络智能服务上层应用,随需而动。其控制层与数据层分离的网络模型能够实现网络流量的灵活控制,减轻控制层的负担。随着数据流量的不断增大以及网络规模的不断扩大,单点控制器模式显然已经无法满足对整个网络的管控需求,一旦控制器单点失效,将造成整个网络的瘫痪。本文在充分考虑到网络系统高可用性的同时,将广域网中多控制器间的信息传播延迟作为影响整个SDN控制网络性能的关键因素,对SDN网络控制层的控制器位置部署问题进行了较为深入的研究。本文详细研究分析了SDN网络架构中控制器位置部署方式对整个SDN网络控制层的性能影响,并提出了关于合理部署控制器位置的最优部署策略。在对该问题深入研究的基础上,充分考虑到网络系统的高可用性需求,从保障多控制器系统高可用性角度出发,利用冗余备份技术,提出了一种新颖的控制器备份部署策略(Optimal Redundant Deployment Strategy)——"ORDS"备份策略,以及一种考虑花销的最优备份部署算法(Optimal Backup Algorithm)——"OBA"备份算法,从而减小了控制器间的信息交互距离,缩短了控制信息交互时间,进而使得整个控制网络系统能够更加高效可靠地满足用户的需求。最后,本文对提出的控制器备份部署策略以及备份算法进行了功能及性能测试,充分验证了以上关键技术问题解决的可行性及正确性,并针对研究中存在的一些问题,对以后的研究工作做了一个展望。
[Abstract]:As a new network architecture, Software-Defined Network (SDN) is building modern network with very strong force. It can not only improve the efficiency of network equipment operation and maintenance, liberate the working time of IT personnel, but also make the upper application of network intelligent service move on demand. The network model which separates the control layer from the data layer can realize the flexible control of the network flow and lighten the burden of the control layer. With the increasing of the data flow and the expansion of the network scale, the single-point controller mode obviously can not meet the control needs of the whole network. Once the controller fails at a single point, it will lead to the paralysis of the whole network. Considering the high availability of the network system, the information propagation delay between multiple controllers in WAN is considered as the key factor to affect the performance of the whole SDN control network. The problem of controller location deployment in SDN network control layer is studied in detail. In this paper, the effect of controller location deployment on the performance of the whole SDN network control layer is analyzed in detail, and the optimal deployment strategy for the reasonable deployment of controller location is proposed. Based on the deep research of this problem, considering the high availability requirement of the network system, the redundant backup technology is used to ensure the high availability of the multi-controller system. In this paper, a novel optimal deployment Strategy "ORDS" backup strategy and an optimal backup Algorithm (OBA) backup algorithm are proposed to reduce the information exchange distance between controllers. The control information exchange time is shortened, which makes the whole control network system more efficient and reliable to meet the needs of users. Finally, the function and performance of the proposed backup deployment strategy and backup algorithm are tested, which fully verify the feasibility and correctness of solving the above key technical problems, and aim at some problems in the research. The future research work is prospected.
【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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