摘要
VPN是一种依靠ISP和其他NSP在公用网络中建立专用数据网络的技术。在虚拟专用网中,大学论文网www.wnwu.com任意的两个节点之间的连接并没有传统专用网络所需的端到端的物理链路,而是利用某种公众网的资源动态组成的,是通过特殊设计的硬件和软件直接通过共享的IP网所建立的隧道来完成的。它利用了公共网络做为企业骨干网有低成本的优势,通过相应的加密和认证技术来保证用户内部网络数据在公网上安全传输,克服了公共网络缺乏保密性的弱点,真正实现网络数据的专有性和安全性。
MPLS技术属于第三代网络架构技术,它把第2层交换技术跟第3层路由技术结合在一起,以便建立一个具有更好性能、更高稳定性、灵活的和易于扩展的高速主干网络。MPLS适合于动态隧道技术,而隧道技术是目前支持VPN业务的有效手段;同时,MPLS技术通过标记可以实现快速数据转发和网络质量(QoS)控制,也为VPN网络带来与众不同的好处。本文研究的基于MPLS技术的VPN网络正是利用了MPLS的动态隧道技术和网络质量控制技术来实现VPN网络,它结合了MPLS技术和VPN网络两方面的优点,克服了传统技术构建VPN网络的缺点,极大的提高了用户网络运营和管理的灵活性,同时又能满足用户对网络传输的安全性、实时性、宽频带等高性能的需求。
关键词:MPLS技术,VPN网络,MPLS技术的VPN网络
ABSTRACT
VPN,supported by ISP and other NSP, is one technology which establishes the private data network in the public network. Actually in the Virtual Private Network, it does not have the end-to-end physical link between the two random nodes that the traditional private network need.Usually, it consists of some dynamic resources from the public networks like a tunnel which is established through the sharing IP network and the specially designed hardware as well as the software.Considering the lower cost,it takes the public network as backbone network in enterprises.Through the corresponding encryption and authentication techniques it makes sure that internal network users can transmit the data online safely.At the same time,VPN has removed the weak point about the security in the public network which also guarantee the data’s proprietary and safety.
The MPLS technology belongs to third generation network construction technology. It combines the 2nd exchange technology with the 3rd route technology so as to build up a high-speed network that has a better performance, higher stability, more flexibility and easier expansibility. MPLS should be used in the dynamic tunnel which is a effective way to carry out the VPN service at present.At the same time, the MPLS technology may realize the fast data repeater and the quality of service (QoS) controls, it also brings the out of the ordinary advantage for the VPN network.What the article mainly discussed is right about the using of MPLS dynamic tunnel technology and the service of quality to realize the VPN network based on MPLS. It combines the advantages of both MPLS technology and the VPN network,then overcomes the shortcoming of the traditional VPN network technology.And it enormously enhances the flexibility of the users’ network on managing and operating which simultaneously meets the users’ demand on the high performance of the network data transmission such as security, real-time, the wideband or something.
Keywords: MPLS, VPN network, MPLS VPN network technology
目录
第1章 绪论大学论文网www.wnwu.com 1
1.1课题概要 1
1.2 课题研究的意义 2
第2章 VPN基础 4
2.1 VPN技术 4
2.1.1什么是VPN 4
2.1.2 VPN的工作原理 5
2.2 VPN的应用方案 5
2.3 实现VPN的隧道技术 7
2.4 VPN的安全 8
第3章 VPN的发展和未来趋势 10
3.1 安全协议构筑VPN的首要特性 10
3.2 VPN的设计原则 10
3.3 VPN技术的现状 11
3.3.1 VPN技术的应用现状 11
3.3.2 市场的应用现状 12
3.4 VPN存在的问题 13大学论文网www.wnwu.com
3.4.1VPN的管理有待加强 13
3.4.2第二层协议的问题 14
3.4.3 IPsec与动态地址分配问题 14
3.5 VPN的趋势和未来展望 14
3.5.1 发展趋势 14
3.5.2 VPN技术的应用前景 14
3.5.3 VPN服务方式的趋势 15
3.6 VPN的发展方向 15
第4章 MPLS交换技术 17
4.1 MPLS交换技术的概述 17
4.1.1与MPLS相关的几个概念及定义 17
4.1.2 MPLS技术的实现 18
4.2 MPLS的优势 20
4.2.1标记转发 20
4.2.2动态隧道技术 20
4.2.3 MPLS流量工程 20
4.2.4 MPLS流量工程与QoS 21
第5章 MPLS技术在VPN上的应用 22
5.1 基于MPLS的VPN实现 22
5.1.1 MPLS VPN 的工作原理 22
5.1.2 MPLS VPN的网络构成 22
5.1.3 MPLS VPN 体系结构 24
5.1.4 MPLS VPN的工作过程 25
5.1.5 MPLS VPN实施步骤 26
5.2基于MPLS的VPN的优势 27
5.2.1 MPLS VPN与传统路由实现VPN的对比分析 27
5.2.2 MPLS VPN与IP 隧道VPN的对比 28
5.3 MPLS VPN的安全性 28
5.4基于MPLS VPN 的网络的可实现应用 31
5.5 MPLS VPN技术面对的挑战 32
5.5.1兼容性大学论文网www.wnwu.com 32
5.5.2 MPLS VPN网管 32
5.6 MPLS VPN的总结 33
结论 34
参考文献 35
致谢 36