Mpls Vpn Theory And Its Applications

Internet take human's lives into the information time. Not only do PEOple send email, chat, but also more do they want to achieve overall informationization applications. So ISPs (Internet Service Providers) should offer broad band services based on Internet, the Broad band Network.. The goal to establish the Broad band Network is implementing 5 targets: EG (Electronic Government), EC (Electronic Commerce), EI (Enterprise Informationization), RE (Remote Education), RX (Remote Examining) .On one hand, the key to 5 goals realization rely on building a stability, reliability, expandibility and high-security broad network. Therefore, the service standard of the network should draw up according to the network traffic, quantity of service, private. On the other hand, for the sake of the economy cost, we shouldn't reset up the new network, hence the PEOple put forward that we should make use of existing network infrastructure to build up the Virtual Private Network (VPN) to carry out these functions.VPN is a outcome of the technique of Internet and the communication need fast fierce development. Along with fast expanding of Internet and its application areas continuously, many enterprises (such as government, finance, troops, the business enterprise group...etc.) more and more to know the importance that using cheap public communication facility sets up own VPN, and the secure transmission of datum in the local section through VPN, thus drive the VPN 's study and process both on the techniques and the theories.MPLS (Multiprotocol Label Switching) is "key" that opens the door of entering the new VPN technique of century. MPLS belongs to the next generation network (NGN) structure, is a exchange standard of IP high-speed backbone network. MPLS can make the Internet Service providers(ISPs) carry the height expansive, classifiable IP businesses with the QoS of end to end, and the ISPs and customers can more briefnessly deploy and manage network.The importance in this paper is from satisfying the need of the customer's high performance, high safety, high reliability, and combining the features of MPLS and VPN, I put forward a different solution with common solutions: The second Layer (L2) MPLS VPN method, also present a case of MPLS VPN deployment.The structure of this paper is as follows:1, Preface, introducing the origin of VPN, the VPN application areas and the actuality;2, Introducing the concept of VPN, classification and existent problems, fetch out MPLS VPN;3, Introducing the MPLS principle and the solution;4, Elaborating the features, category of the MPLS VPN , and detailed comparison to two kinds ofMPLS VPN;5, Analyzing the arithmetic of QoS, security and the measure of the failure recovery based on MPLS VPN;6, Summarizing particularly the technology to MPLS VPN is used in the actual case and in the light network of realization;7, Conclusion, summing up technique characteristics, gains and losses in this paper.