基于OpenFlow的异构网络统一控制机制研究
发布时间：2018-09-12 08:21
【摘要】：随着网络规模的不断扩大,网络业务呈现出种类多样化,数量巨大化的趋势。为了适应网络的发展和业务的需求,未来网络必须是能够满足全业务,高带宽和灵活自适应性的要求。在此背景下,采用集中式控制的SDN (Software Defined Networking)技术应运而生。 SDN网络将控制和传输相分离,屏蔽了由底层多种交换设备接口不开放而产生的障碍。应用层无需了解底层的设备情况,可以通过标准的网络接口根据自身需求动态修改添加策略,实现业务的定制化。 本论文重点研究了利用OpenFlow协议对SDN架构下的异构网络进行统一控制,在与之相关的三个方向上完成了以下工作和创新： 第一,针对现网中ASON/GMPLS网络侧重于针对连接建拆处理的控制,不适应未来网络控制平面智能面向业务处理发展的问题,提出了一种采用OpenFlow光扩展的SDN集中式控制架构,利用多Controller协作实现底层异构网络设备间组网的统一控制机制。本课题参与完成NOX和Switch模块设计以及实验平台搭建的工作,实现了不同交换设备与同一控制平面的互联互通,全网资源的统一调度,动态带宽调节和Bypass策略添加等功能。 第二,为了实现网络资源最优化规划,在IP over WDM网络中提出了一种面向SDN集中控制方式下的新型跨层业务流量疏导策略。仿真结果表明,相较于传统基于分布式的Bypass流量疏导方法,该策略可以在综合全网资源的前提下,对不同粒度的业务分别进行疏导,明显提高了资源利用率,同时也能够有效降低业务能耗。 第三,针对SDN网络集中式控制架构中控制器易受攻击,且控制器瘫痪后对网络影响巨大的问题,提出了一种SDN网络控制器的动态部署实现方案。该方案将控制器与交换设备相耦合,设计了一种扁平化的SDN网络。这可以降低网络对于单一控制器的依赖,实现控制器失效后网络的快速恢复,提高网络可靠性。
[Abstract]:With the continuous expansion of network scale, network services show a trend of diversification and quantity. In order to meet the needs of network development and service, the future network must be able to meet the requirements of full service, high bandwidth and flexibility. In this context, SDN (Software Defined Networking) technology with centralized control emerges as the times require. The SDN network separates control from transmission and shields the obstacles caused by the closed interfaces of various switching devices at the bottom. The application layer does not need to know the situation of the underlying equipment and can dynamically modify the addition strategy according to its own requirements through the standard network interface to realize the customization of the service. This paper focuses on the unified control of heterogeneous networks under SDN architecture by using OpenFlow protocol, and completes the following work and innovations in three related directions: first, In view of the problem that the ASON/GMPLS network in the present network is focused on the control of connection construction and disassembly processing, which is not suitable for the future network control plane intelligence oriented service processing development, a centralized control architecture of SDN using OpenFlow optical expansion is proposed. The unified control mechanism of networking among the underlying heterogeneous network devices is realized by using multiple Controller collaboration. This project is involved in the design of NOX and Switch modules and the construction of experimental platform. It realizes the interconnection of different switching devices and the same control plane, the unified scheduling of the whole network resources, the dynamic bandwidth adjustment and the Bypass policy addition. Secondly, in order to realize the optimal planning of network resources, a novel cross-layer traffic grooming strategy for SDN centralized control is proposed in IP over WDM networks. The simulation results show that compared with the traditional Bypass traffic grooming method based on distributed network, this strategy can channel different granularity services under the premise of synthesizing the whole network resources, and improves the resource utilization rate obviously. At the same time, it can also effectively reduce business energy consumption. Thirdly, aiming at the problem that the controller is vulnerable to attack in the centralized control architecture of SDN network, and the controller is paralyzed, a dynamic deployment scheme of SDN network controller is proposed. The controller is coupled with the switching equipment and a flat SDN network is designed. This can reduce the dependence of the network on a single controller, realize the rapid recovery of the network after the failure of the controller, and improve the reliability of the network.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02
本文编号：2238448
[Abstract]:With the continuous expansion of network scale, network services show a trend of diversification and quantity. In order to meet the needs of network development and service, the future network must be able to meet the requirements of full service, high bandwidth and flexibility. In this context, SDN (Software Defined Networking) technology with centralized control emerges as the times require. The SDN network separates control from transmission and shields the obstacles caused by the closed interfaces of various switching devices at the bottom. The application layer does not need to know the situation of the underlying equipment and can dynamically modify the addition strategy according to its own requirements through the standard network interface to realize the customization of the service. This paper focuses on the unified control of heterogeneous networks under SDN architecture by using OpenFlow protocol, and completes the following work and innovations in three related directions: first, In view of the problem that the ASON/GMPLS network in the present network is focused on the control of connection construction and disassembly processing, which is not suitable for the future network control plane intelligence oriented service processing development, a centralized control architecture of SDN using OpenFlow optical expansion is proposed. The unified control mechanism of networking among the underlying heterogeneous network devices is realized by using multiple Controller collaboration. This project is involved in the design of NOX and Switch modules and the construction of experimental platform. It realizes the interconnection of different switching devices and the same control plane, the unified scheduling of the whole network resources, the dynamic bandwidth adjustment and the Bypass policy addition. Secondly, in order to realize the optimal planning of network resources, a novel cross-layer traffic grooming strategy for SDN centralized control is proposed in IP over WDM networks. The simulation results show that compared with the traditional Bypass traffic grooming method based on distributed network, this strategy can channel different granularity services under the premise of synthesizing the whole network resources, and improves the resource utilization rate obviously. At the same time, it can also effectively reduce business energy consumption. Thirdly, aiming at the problem that the controller is vulnerable to attack in the centralized control architecture of SDN network, and the controller is paralyzed, a dynamic deployment scheme of SDN network controller is proposed. The controller is coupled with the switching equipment and a flat SDN network is designed. This can reduce the dependence of the network on a single controller, realize the rapid recovery of the network after the failure of the controller, and improve the reliability of the network.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02
【参考文献】
相关期刊论文 前1条
1 郭春梅;张如辉;毕学尧;;SDN网络技术及其安全性研究[J];信息网络安全;2012年08期
，本文编号：2238448
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