Topology-Independent Loop-Free Alternate (TI-LFA) in IS-IS for IPv6-only networks

You can configure TI-LFA with segment routing in an IPv6-only network for the IS-IS protocol. TI-LFA provides fast reroute (FRR) backup paths corresponding to the post-convergence path for a given failure. TI-LFA provides protection against link failure, and node failure. You can enable TI-LFA for IS-IS by configuring use-post-convergence-lfa statement at the [edit protocols isis backup-spf-options] hierarchy level. You can enable the creation of post-convergence backup paths for a given IPv6 interface by configuring the post-convergence-lfa statement at the [edit protocols isis interface interface-name level level] hierarchy level. The post-convergence-lfa statement enables link-protection mode. You can enable node-protection mode for a given interface at the [edit protocols isis interface interface-name level level post-convergence-lfa] hierarchy level. However, you cannot configure fate-sharing protection for IPv6-only networks.