基于多主控系统的OSPF协议主备同步的研究与实现

发布时间：2018-03-04 19:40

本文选题：OSPF　切入点：同步　出处：《武汉邮电科学研究院》2014年硕士论文　论文类型：学位论文

【摘要】：随着网络不断发展,网络中的设备数量、类型越来越多,业务也越来越多样化。这也对整个网络的可靠性提出了更高的要求,高可靠性是对电信级设备最基本的要求。当前大多采用不问断转发(NSF, Non-Stop-Forwarding)技术来提升设备的可靠性,但该技术对周边设备环境的要求比较高,在实际工程应用中有较多局限性。因此,一种新的高可靠性实现方案,我们称之为不间断路由(NSR, Non-Stop-Routing)技术开始在网络工程中得到更多应用,该技术不需要对周边设备环境有特殊要求,可实现设备切换过程路由业务不中断。本论文主要内容是OSPF (Open Shortest Path First,开放式最短路径优先)路由协议同步机制的设计和实现,通过该同步机制可实现NSR功能,即可实现设备切换过程中路由业务不中断。论文基于OSPF路由协议,在机架式设备的高可靠性多主控系统中引入OSPF协议同步机制,对OSPF协议同步机制的问题进行多方面优化设计。从而达到实现同步机制的实时性、可靠性的目的。文章在探讨高可靠性多主控系统的基础上,分析了OSPF协议同步实现与优化的关键问题,研究了包括对实例、接口、邻居、链路状态通告(LSA, Link State Advertisement)在内的所有OSPF消息的同步问题。论文分析了OSPF协议同步过程中经常出现的问题,包括大批量LSA同步、LSA分片同步、重传LSA同步等问题,明确了OSPF协议同步机制的基本优化思路并提出了可行的改造方案。通过上述研究方法,实现了OSPF协议同步的基本流程,按照同步触发点的不同可分为两种类型,分别为初始化同步和实时同步。同时针对大批量LSA同步、LSA分片同步、重传LSA同步等过程进行了详细设计,并将其应用在机架式设备上。通过在机架式设备上的实际应用,表明优化设计后的OSPF协议同步机制的效率、可靠性得到了显著的提高,具有很高的实际应用价值,该研究机制可以保证机架式设备协议层面的高可靠性,有效保证业务处理的不中断,提升整个电信网络的服务质量。
[Abstract]:With the continuous development of the network, the number of devices in the network is increasing, and the types of devices in the network are becoming more and more diversified, which puts forward higher requirements for the reliability of the whole network. High reliability is the most basic requirement for telecom grade equipment. At present, most of them use NSF (Non-Stop-Forwarding) technology to improve the reliability of the equipment, but this technology has higher requirements for the surrounding equipment environment. Therefore, a new high reliability implementation scheme, called Non-Stop-Routing (Non-Stop-Routing) technology, has been applied in network engineering. This technology does not need to have special requirement to the peripheral equipment environment, and can realize the routing service of the device switching process without interruption. The main content of this paper is the design and implementation of the synchronization mechanism of the OSPF Open Shortest Path first (Open shortest path first) routing protocol. Through this synchronization mechanism, the NSR function can be realized, and the routing service can not be interrupted during the device switching. Based on the OSPF routing protocol, this paper introduces the OSPF protocol synchronization mechanism into the high reliability multi-master control system of the machine frame equipment. In order to realize the real-time and reliability of the synchronization mechanism, the problem of synchronization mechanism of OSPF protocol is optimized in many aspects. This paper discusses the high reliability multi-master control system. In this paper, the key problems of synchronization and optimization of OSPF protocol are analyzed, including instance, interface, neighbor, etc. The synchronization of all OSPF messages including link state notification (LSA), Link State advertisement (LSA), etc. This paper analyzes the common problems in the process of OSPF protocol synchronization, including mass LSA synchronization, retransmission LSA synchronization and so on. This paper clarifies the basic optimization idea of the synchronization mechanism of OSPF protocol and puts forward a feasible modification scheme. Through the above research method, the basic flow of synchronization of OSPF protocol is realized, which can be divided into two types according to the different trigger points of synchronization. In order to initialize synchronization and real time synchronization respectively. At the same time, it is designed in detail for batch LSA synchronization, retransmission LSA synchronization and so on, and it is applied to the machine frame equipment. Through the practical application on the machine frame equipment, The results show that the efficiency and reliability of the OSPF protocol synchronization mechanism after optimized design have been improved significantly and have high practical application value. The research mechanism can guarantee the high reliability of the protocol level of the machine frame equipment. Effectively ensure the service processing without interruption, improve the quality of service of the entire telecommunications network.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.34

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