电信运营商IP城域网IPv6方案部署

发布时间：2018-04-06 07:43

本文选题：城域网　切入点：IPv4　出处：《南昌大学》2017年硕士论文

【摘要】：随着互联网技术的不断发展,网络上需要越来越多的连接,对IP地址的需求也越来越大。而我国运营商所拥有的IPv4地址远远不足以满足业务需求,于是各大运营商针对自身的实际情况,提出了分步骤进行网络升级改造,因地制宜部署过渡技术解决地址短缺问题,满足用户和业务的可持续性发展,逐步实现网络的平滑演进的总体发展思路。本文首先描述了目前业内主要采用的三种IPv6过渡技术,包括各种过渡技术的实现原理,城域网改造方案以及上网流程。其中城域网的改造方案主要提出了对各层级网元的升级改造和路由部署;通过对上网过程的描述,比较清晰的反映出用户拨号到上网的端到端流程,可以得出每个阶段的不一致的地方,以便在后期实际部署和故障处理时提供参考。然后着重介绍了IPv6部署所涉及到的主要IP和IT支撑系统的改造,通过对各主要IP/IT系统进行了现状分析描述,然后结合需求提出具体改造方案和措施;在完成了网络及支撑系统的改造后,对后全流程进行了说明,将上面提到的网络改造和支撑系统改造串联起来,从用户的开户、认证、地址分配、溯源等进行全流程分析,重点对与IPv4不一致的地方进行了描述,帮助读者全面了解方案的实施效果。最后是结合现网实际工程部署情况,对CGN设备的集中备份方案进行了探讨;主要表现在目前分布式部署场景下,运营商出于安全可靠性的要求,每台BRAS都采用1+1/1:1的模式进行本地冗余备份,造成大量的资源浪费,增加了投资成本,为解决这一问题,在CR层旁挂集中式备份设备,各BRAS设备按需配置CGN板卡,当CGN板卡出现故障时,自动将流量切换至集中式设备,同时解决备份及投资的问题。目前各大运营商都在简单的采用NAT技术,以延缓IPv4的地址消耗速度,这种简单的方式虽然短时期内可以维持业务正常运营,但是依然无法从根本上解决IPv4面临的地址耗尽问题,为此基于城域网端到端的IPv6改造研究对于今后全面推进下一代互联网的建设和应用至关重要,对运营商的工程建设具有重要的推动作用。
[Abstract]:With the continuous development of Internet technology, the network needs to connect more and more, the IP address is also increasing demand. But China's operators have IPv4 address is not enough to meet the needs of the business, so the operators according to their actual situation, put forward the steps to upgrade local network deployment the transition solves the address shortage problem, sustainable development and meet the needs of users and business, the overall development of ideas and gradually realize the smooth evolution of the network. This paper describes three kinds of IPv6 transition technology is mainly used in the industry, implementation of the principle of including transition technology, network reconstruction scheme and Internet process. The transformation scheme of metropolitan area network mainly put forward on different levels of network upgrade and deployment of Internet routing; through the description of the process, clearly reflects the user to dial the number Network end to end process, inconsistencies can be drawn for each stage, in order to provide reference in the later actual deployment and fault handling. Then it focuses on the transformation of IPv6 deployments are mainly related to the IP and IT support system, based on the main IP/IT system was carried out to analyze the current situation, and then combined with the demand put forward specific reform programs and measures; after the completion of the transformation of the network and support system, the whole process is described, the above mentioned network transformation and support system together, from the user's account, authentication, address assignment, traceability for the whole process of analysis, this paper focuses on the description of inconsistent with IPv4, help readers to better understand the implementation effect. Finally, combining with the current network engineering deployment, centralized backup scheme for CGN devices is discussed mainly in the current distributed; Deployment scenarios, operators for safety and reliability requirements, each BRAS uses 1+1/1:1 mode of local redundancy, waste of resources, increase the cost of investment, in order to solve this problem, a centralized backup device in the CR layer hanging beside the BRAS device configure the CGN card, CGN card appears when when the fault, will automatically switch to the centralized traffic equipment, at the same time to solve the backup and investment. At present all operators are using simple NAT technology, in order to delay the address of the IPv4 consumption rate, this simple way although the short term can maintain normal business operations, but still can't fundamentally solve the facing the IPv4 address this depletion problem, based on metropolitan area network end to end IPv6 transformation research for future application of important and comprehensively promote the construction of the next generation Internet, the operators of the project construction is heavy The driving force of the need.

【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.1

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