简介:摘要 在企业内部通信组网中,应用数据通信网GRE VPN技术,可以实现跨越运营商公共网络,在企业总部与分支机构之间搭建企业内部三层网络,为企业网络改造提供一种简单实用的解决方案。
简介:MPLS(Multi-ProtocolLabelSwitching)VPN(VirtualPrivateNetwork)traffichasbeendeployedwidely,butcurrentlyonlysupportsunicast.ThispaperbrieflyintroducesseveralavailableMPLSVPNmulticastapproaches,andthenanalyzestheirdisadvantages.Anovelmechanismthatusestwo-layerlabelstacktosupportMPLSVPNexplicitmulticastisproposedandtheprocessisdiscussedindetail.Thescalabilityandperformanceoftheproposedmechanismarestudiedanalytically.Theresultshowsthatoursolutionhasgreatadvantageoverthecurrentlyavailableschemeintermsofsavingcorenetworkbandwidthandimprovingthescalability.