Company Y is a mobile backhaul provider that uses microwave rings in their network. Which low-cost, simple technology do you recommend to Company Y to ensure the fastest convergence times in a ring to

Sub-second IGP hello and dead timers only accelerate failure detection - they do not pre-compute alternate forwarding paths, so convergence still depends on SPF recalculation after the failure is detected.

MPLS Traffic Engineering with FRR does provide fast reroute, but it requires a full MPLS TE infrastructure (RSVP-TE, TE tunnels, headend configuration), making it neither low-cost nor simple for a microwave backhaul provider.

Remote LFA extends the standard LFA mechanism by using LDP-signaled tunnels to reach a remote repair node, allowing pre-computed backup paths even in ring topologies where a directly connected LFA neighbor does not exist. It provides sub-50ms IP Fast Reroute convergence without the cost and complexity of MPLS Traffic Engineering, making it ideal for microwave backhaul rings.

IP Event Dampening suppresses route advertisements from flapping interfaces to improve stability, but it deliberately delays convergence and does not provide a fast alternate forwarding path.

Hub-and-spoke with ECMP changes the fundamental ring topology and introduces a centralized hub as a single point of failure, which contradicts the resiliency goal of a ring design.