【作者】 翁全玉；

【导师】 赵成林；

【作者基本信息】 北京邮电大学 ， 电子与通信工程， 2009， 硕士

【摘要】 随着社会的进步、网络技术不断发展及Internet的快速发展,网络应用也由以往单一的数据业务转变成了现在的数据、语音、视频等三大主流业务,人们对应用也提出了更高的需求。由于Internet缺乏有效的流量和网络带宽管理手段,网络经常会发生拥塞。当现有Internet规模扩充到一定限度后,将在许多方面(带宽、路由、网络扩展性、QoS)面临挑战,这对于目前的IP技术来说已是力不从心。如何使ATM技术融入IP,如何将路由和交换结合起来,成为目前研究的热点。众多厂商和学者提出了许多新方案,直到多协议标记交换(MPLS)的出现,才使人们看到了一丝曙光。多协议标记交换(MPLS)是一项新的宽带网技术,这一技术结合了IP网络的三层路由功能和传统二层网络的交换机制,转发平面采用面向连接方式,与现有二层网络转发方式非常相似。使得MPLS能够很容易地实现IP与ATM、帧中继等二层网络的无缝融合,能够为VPN(Virtual Private Network)、QoS (Quality of Service)、TE (Traffic Engineering)应用提供更好的解决方案。MPLS的一个重要应用即是构建MPLS/VPN网络。传统的VPN一般是通过GRE (Generic Routing Encapsulation). L2TP (Layer 2 Tunneling Protocol)、PPTP (Point to Point Tunneling Protocol)等隧道协议来实现私有网络间数据流在公网上的传送。因为LSP本身就是公网上的隧道,所以用MPLS来实现VPN有天然的优势。基于MPLS的VPN就是通过LSP将私有网络的不同分支联结起来,形成一个统一的网络。本课题从多协议标记交换(MPLS)的起源、VPN的发展趋势、所面临的挑战入手,对多协议标记交换(MPLS)和VPN技术从基本概念、系统结构、原理以及优点等方面作了较全面的讨论和研究。结合福州分公司目前网络状况,对客户端所采用的几种组网方案进行深入的探讨,最后结合跨区域企业的特点,详细说明已在实践中应用的MPLS的企业内部网络解决方案。更多还原

【Abstract】 As the development of society, network technology and the internet, the appliance of net has converted from the single data operation to three main operations, data operations, phonic operations and video operations. People have a higher demand of the appliance. Because of the lack of effective management of the flux and bandwidth, net congestion always occurs.When the scale of internet is extended to a certain bounds, challenges occur in many aspects, such as bandwidth, route, expansibility and Qos.How to apply technology of ATM on IP, and to combine route with exchange, becomes focus of the research.Manufactures and scholars have put forward many new projects. But people didn’t see any light until the MPLS occurred.MPLS is a new broadband network technology, which combines the function of three-layer-route and that of the traditional exchange mechanism of two-layer-net. It makes the MPLS easier to carry out the non-gap inosculation of IP, ATM and frame relay, and provides better solutions to the appliance of VPN (Virtual Private Network),QoS (Quality of Service) and TE (Traffic Engineering)An important application of MPLS is to construct a MPLS/VPN net.The traditional VPN transmit data stream from private net though public net according to the tunnel agreement.Since it is the tunnel on public net, LSP has advantage to carry out VPN.VPN basis on MPLS is to connect all the branches of the private net to a uniform net.This task launches on the conception of technology of MPLS, and have a general discussion and research on it’s system structure, hypo-structure and technology criterions, etc, and puts forward solution to the inter-enterprises networking basis on the MPLS, according to the characteristics of the Cross-regional enterprises.Base on the origin of the MPLS and the development and challenge of the VPN,this topic is going to comprehensive discuss and research the fundamentel concept, structure of the system,and the advantage of the MPLS and VPN. Moreover,this topic will study the various plans of the network structure according to the current situation of Fuzhou telecom.Considering the operation of the cross-area firm,at the end,a detailed network structure solution will be explained for the apllication of the MPLS in greneral company更多还原