VPN毕业设计之外文资料翻译.doc

外文资料翻译 作者： 指导老师： Multi protocol label switching virtual private network ( MPLS VPN ) launched a peer-to-peer mode, can support the massive IP VPN implementation. This model greatly simplifies VPN client and service provider routing and management, at the same time, to ensure that the VPN between the correct segregation. For the implementation of the model, MPLS VPN requires IP existing routing protocol is extended and a MPLS transmission network. Cisco IOS software version 12(28) S and later support Cisco IP MPLS VPN and MPLS VPN, it uses the same function, but using IP transmission instead of the MPLS transmission. VPN traffic tunnel by IP, rather than MPLS label switched path ( LSP ) transmission. The characteristics of the IP network is realized in the MPLS MPLS VPN service cannot support. Either in IP or MPLS backbone network implementation, Cisco IP MPLS VPN retains the same application and service features. For example, companies can make use of the technology will be IP network segmentation, based on the framework of support different group, or for other services provided for IP services. The segmented support overlapping address and flexible flow forwarding topology. In another case, the network engineer can use the technology to build a centralized server infrastructure, composed of a plurality of VPN share. Cisco IP MPLS VPN for VPN service providers and users to provide a new application and service opportunities. For example, the MPLS VPN service providers can use the autonomous system configuration, its services will be extended to a MPLS support network. Similarly, two suppliers can MPLS VPN services to achieve peer-to-peer protocol, even if they are using the IP transmission. In another case, the MPLS VPN user VPN services can be partition, in order to create its own internal VPN service. Due to the users and suppliers almost without coordination, therefore, this applica