This article describes the connection model of MPLS VPN and the role of P router,PE router and C router,and describes the important concepts of VRF,route distinguisher(RD)and route target(RT),and the model of MPLS VPN route as well.

• 本篇详述了MPLS VPN的连接模型以及P路由器、PE路由器和C路由器的角色。 介绍了VRF、路由区分符RD和路由目标RT等重要概念以及MPLS VPN路由的模式。