基于IP城域网的MPLS VPN拓扑结构分析

MPLS VPN Topology Analysis Based on IP＇ s MAN

传统DDN专网属于星型拓扑结构，缺点是逻辑拓扑难于调整、网络可扩展性和可维护性较差。为了解决这些问题．在ISP的城域网中，利用MPLS技术组建VPN，通过LDP邻居测试、路由跟踪测试等方法和理论分枷，证明了MPLS VPN的逻辑拓扑结构为全网状，解决了传统覆盖型VPN拓扑结构不易调整的问题。

Traditional DDN Private Network belongs to star topology with shortcomings of difficult adjustment of logical topology and worse extendibility and maintainability of network. To deal with these questions, In ISP Metropolitan Area Network, VPN is constructed with MPLS technique, and that MPLS VPN logical topology is all net-shaped is proved and the problem that traditional Overlay-VPN topology is not easily adjusted has been solved through the ways and theoretical analysis such as LDP neighbor test, routing-following test.