基于VPN的快速重路由技术

CE双归属是现实网络中非常普遍的一种组网形式，基于VPN的快速重路由技术立足于此种网络模型，在远端PE上部署，并可以使用路由匹配策略挑选需要保护的远端CE路由，以解决主用PE故障时的业务端到端快速收敛问题。该方法简单可靠，易于部署，有效地缩短了CE双归属网络中PE设备故障引起的端到端业务中断时间。

Virtual Private Network Fast Re-route Technology

The Virtual Private Network Fast Re-route technology is based on the general networking with CE dual homing deployment. To enable fast convergence in case of active PE fault, that can apply VPN FRR to the remote PE and select the remote CE routes needing protection based on the route matching policy. The conclusion is that the VPN FRR is a simple, reliable, and easy-to-deploy technology that can effectively shorten the down time of end-to-end services in case the PE equipment in the CE dual homing network breaks off.