ipv6 frr (VPN instance IPv6 address family view)

Usage Scenario

With the development of the network, services such as audio, online video, and finance have more requirements for real time. Generally, active/standby links are deployed on the network to ensure service stability.

However, under traditional forwarding modes, when multiple routes to the same destination exist, the system selects the optimal route, which is delivered to FIB table to direct data forwarding. When the optimal link is faulty, the system waits for the completion of route convergence, then selects another optimal route, and then deliver the route to the FIB table. Then the service is recovered. This process leads to a long-time service interruption and cannot meet service requirements.

Using the ipv6 frr command enables IPv6 FRR of the private network. IPv6 FRR can specify a backup next hop and a backup interface and set backup forwarding information for IPv6 routes. When the active link is faulty, the system can switch the traffic immediately to the backup link. This process is irrelevant to route convergence and therefore services are interrupted for short time.

Pre-configuration Tasks

The ipv6 frr command should be used with the apply ipv6 backup-interface command and the apply ipv6 backup-nexthop command. You are advised to use the route-policy command to create Route-Policy at first, in which the apply ipv6 backup-interface command and the apply ipv6 backup-nexthop command are used to set a backup outbound interface and a backup next hop for IPv6 route of the private network.

Precautions

Only one policy can be used at one time. New configuration will replace the previous one if another policy is configured. Configuration in the system view and that in the VPN instance IPv6 address family view will not interfere each other.