Topology-independent loop-free alternate for OSPF

Topology-independent loop-free alternate (TI-LFA) with segment routing provides MPLS fast reroute (FRR) backup paths corresponding to the post-convergence path for a given failure. You can enable TI-LFA for OSPF by configuring the use-post-convergence-lfa statement at the [edit protocols ospf backup-spf-options] hierarchy level. When used with OSPF, TI-LFA provides protection against link failure and node failure. You can enable the creation of post-convergence backup paths for a given interface by configuring the post-convergence-lfa statement at the [edit protocols ospf 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 ospf area area interface interface-name post-convergence-lfa] hierarchy level.