Egress protection for Layer 3 VPN edge protection

Typically, Layer 3 VPN service-restoration for multihomed customer edge (CE) routers depends on the ingress provider edge (PE) router to detect the egress PE link or node failure and switch traffic to the backup PE router. To achieve faster restoration, one can use a protector mechanism for the PE router to perform local restoration of the service immediately in case of an egress PE node failure. This mechanism is known as egress protection and requires the router at the point of local repair (PLR) router to redirect VPN traffic to a protector PE router for fast reroute of traffic. When you configure egress protection, the PLR detects the protected PE link or node failure and reroutes traffic through the protector PE router using the backup LDP-signaled LSP. The PLR uses per-prefix LFAs to program the backup next hop through the protected PE router and traffic is forwarded to the CE routers using the alternate paths. This restoration is done quickly after the PLR router detects the PE egress node or link failure.