MPLS-VPN工作特性  

MPLS-VPN functional characteristics

作　　者：陈启美[1] 张国强 薛健 

机构地区：[1]南京大学计算机科学与技术系

出　　处：《电力自动化设备》2002年第10期83-87,共5页Electric Power Automation Equipment

摘　　要：MPLS VPN是利用MPLS骨干网建立的用户虚拟专用网。MPLS的优点在MPLS VPN中得到了充分的体现。MPLS VPN通过路由表(VRF)的独立性实现了VPN之间流量的独立性,同时使用IP V4地址到VPN IPV4地址的映射技术解决了VPN之间的地址重名问题。MPLS VPN中包的转发基于VRF表和标签交换技术,其中标签交换技术用于MPLS域内,即骨干网中。重点讨论了VRF的形成过程,并介绍了路由通信属性在路由转发时的作用。MPLSVPN is simply a VPN(Virtual Private Network),which uses MPLS(MultiProtocol LabelSwitching) technology in the backbone to forward the packets. All the advantages of MPLS are highlyillustrated in the MPLSVPN.By the independency of VRF(VPN Routing/Forwarding) table,the independancyof the flow between VPNs of MPLSVPN is realized,and by proper mapping IPV4 address into VPNIPV4address,MPLSVPN solves the problem of using nonunique addresses between VPNs.In MPLSVPN,forwarding of the packets is based on the VRF table and label switching technologies;the latter is used in MPLS domain,i.e.backbone.The formation procedure of the VRF table and the function of the extended community attributes in packet forwarding are discussed.

关 键 词：用户虚拟专用网 计算机风格 MPLS-VPN 工作特性 骨干网 路由识别符 边界网关协议 路由器 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]