IP城域网MPLS-VPN组网的优化方法研究

发布时间：2018-10-10 10:33

【摘要】：随着互联网+的时代的到来,互联网行业在全球范围内呈爆炸式的增长,同时企业纷纷组建自己的虚拟专用网,而在IP城域网中企业各分支机构和商业伙伴之间的信息分发越来越多;随着业务发展对IP城域网中MPLS VPN网络的要求越来越高,如何解决传统MPLS VPN网络的扩展性瓶颈以及如何保障网络的通信质量成为当下需要关注的关键性问题;所以在IP城域网中提出合理的MPLS VPN组网优化方法具有非常重要的研究价值与现实意义。首先,本文详细的介绍了MPLS VPN的相关原理,分别从MPLS技术原理、VPN技术原理、城域网中MPLS VPN技术原理进行相关阐述,并进一步分析了传统MPLS VPN组网架构以及跨域策略的优缺点,提出了当今MPLSVPN网络需要改善的一些问题,同时也为下文的优化研究提供了理论依据。其次,针对传统MPLSVPN组网架构存在的缺陷,提出了基于分层PE技术的组网架构优化方案,这种优化旨在把传统MPLS VPN的控制路由能力与数据转发能力在逻辑功能上尽可能分离,达到网络架构层级化的目的,并增强网络的扩展性;与此同时该方案还优化了等价多路径权值算法,提高了网络整体的安全性和传输质量;然后通过软件进行仿真,对比优化前后VPN的负载、IP数据包的延时、抖动以及网络的丢包率,证明了基于分层PE技术优化后的MPLS VPN组网架构优于传统MPLS VPN组网架构。接着,又针对传统MPLS VPN跨域策略存在的缺陷,提出了基于负载分担技术跨域策略的优化方案,这种优化把本来由跨域设备负责宣告的所有VPNV4路由分担给每个本地的PE设备,而跨域设备不需要再保存或向外宣告任何VPNV4路由,所以此方案可以有效的减少跨域设备负载;然后在ENSP仿真平台上对优化后的跨域策略进行仿真,通过PING测数据包和wireshark软件抓取数据包的方法证明该优化策略在网络层面是可行的;同时比较优化前后跨域策略中设备的CPU利用率,进一步证明了基于负载分担技术的跨域策略能够降低跨域设备的负载,达到提高网络安全性的目的。最后,重点介绍了“江西省电信IP城域网MPLS VPN组网优化设计工程”,并详细阐述了该工程的优化设计方案,在方案中说明了相关设备的性能、参数规划的方法以及QOS部署的方案;然后通过相关测试证明MPLS VPN网络经过本次优化后在页面响应时间、文件下载速度等网络感知指标上远好于优化前。
[Abstract]:With the advent of the Internet era, the Internet industry has explosive growth in the global scope, while enterprises have set up their own virtual private network. In the IP metropolitan area network, more and more information is distributed between the branches of the enterprise and the business partners. With the development of business, the requirement of the MPLS VPN network in the IP metropolitan area network is becoming higher and higher. How to solve the expansibility bottleneck of the traditional MPLS VPN network and how to guarantee the communication quality of the network become the key problems that need to be paid attention to at present. Therefore, it is of great value and practical significance to put forward a reasonable method of MPLS VPN networking optimization in IP metropolitan area network. First of all, this paper introduces the relevant principles of MPLS VPN in detail, respectively from the principle of MPLS technology and the principle of MPLS VPN in metropolitan area network, and further analyzes the advantages and disadvantages of traditional MPLS VPN network architecture and cross-domain strategy. Some problems that need to be improved in MPLSVPN network are put forward, and the theoretical basis for the optimization research below is also provided. Secondly, aiming at the defects of the traditional MPLSVPN network architecture, a network architecture optimization scheme based on hierarchical PE technology is proposed, which aims to separate the control routing capability of the traditional MPLS VPN from the data forwarding capability as far as possible in logic functions. To achieve the goal of hierarchical network architecture, and enhance the scalability of the network; at the same time, this scheme also optimized the equivalent multi-path weight algorithm to improve the overall security and transmission quality of the network. Comparing the delay, jitter and packet loss rate of VPN load IP packet before and after optimization, it is proved that the optimized MPLS VPN network architecture based on layered PE technology is superior to the traditional MPLS VPN network architecture. Then, aiming at the defects of traditional MPLS VPN cross-domain policy, a cross-domain policy optimization scheme based on load-sharing technology is proposed. This optimization distributes all VPNV4 routes declared by cross-domain devices to each local PE device. Cross-domain devices do not need to save or declare any VPNV4 routing, so this scheme can effectively reduce the cross-domain device load, and then simulate the optimized cross-domain policy on the ENSP simulation platform. It is proved that the optimization strategy is feasible on the network level by the method of PING test data packet and wireshark software grasping data packet, and the CPU utilization ratio of the equipment in the cross-domain policy before and after optimization is compared. It is further proved that the cross-domain strategy based on load-sharing technology can reduce the load of cross-domain devices and achieve the purpose of improving network security. Finally, the paper mainly introduces the "Jiangxi Telecom IP man MPLS VPN network optimization design project", and expounds the optimization design scheme of the project in detail, and explains the performance of the related equipment in the project. The method of parameter planning and the scheme of QOS deployment, and then through the relevant tests, it is proved that the MPLS VPN network is much better than the optimization in the page response time, file download speed and other network perception index after this optimization.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.1

【相似文献】