City public-works wants sub-second local repair on its civic OSPF ring when a primary next hop fails. What does enabling Loop-Free Alternate (LFA) primarily provide?
Select an answer to reveal the explanation.
Short Explanation
LFA is the spare tire already bolted under the civic ring truck. When the primary next hop blows, the router already knows a loop-free backup and can steer there without waiting for the whole map to recalculate. It’s local repair, not a brand-new routing protocol.
Full Explanation
OSPF LFA precomputes loop-free backup next hops so forwarding can switch locally after a failure with minimal packet loss. Global SPF still runs, but traffic need not wait for full domain reconvergence to use the backup. LFA does not invent MPLS TE tunnels or redefine BGP redistribution. Its purpose is fast local repair against the primary next hop.