The ipv6 frr command enables IPv6 Fast Reroute (FRR) of the public network in the system view.
The undo ipv6 frr command disables IPv6 FRR of the public network.
By default, IPv6 FRR of the public network is disabled.
Usage Scenario
When there are public network routes generated by multiple types of routing protocols on a device, the ipv6 frr command can be used to enable IPv6 FRR to immediately switch traffic among routes and ensure uninterrupted traffic forwarding if certain routes are faulty.
Configuration Impact
When the ipv6 frr command is not run, the system only selects a group of optimal protocol routes as active routes. After the ipv6 frr command is run, the system selects a group of sub-optimal protocol routes as the backup of related active routes.
Precautions
Note:
A routing loop may occur after the ipv6 frr command is run because the command is used to enable routes generated by different routing protocols to back up each other. Therefore, exercise caution when running the command.