Which technique can you use to detect forwarding path failures at a uniform rate, and reconvergence times will be consistent and predictable when your routers are in the same broadcast domain?

BFD (Bidirectional Forwarding Detection) sends lightweight control packets at a uniform, operator-defined interval independent of the routing protocol, detecting forwarding path failures at the same rate on all participating routers. Because detection is tied to fixed timers rather than protocol-specific mechanisms, reconvergence is triggered at consistent, predictable times across the broadcast domain.

IP-SLA pings can detect reachability loss but operate outside the forwarding plane, are not natively integrated with routing protocol adjacencies, and do not guarantee uniform detection rates across all routers on a segment.

IP-SLA with object tracking adds route failover capability on top of ping probes but still relies on probe timers rather than forwarding-plane detection, making reconvergence timing less uniform and predictable than BFD.

Tuning routing protocol timers can accelerate hello and dead-interval convergence but varies by protocol implementation and does not provide the sub-second, forwarding-plane-level uniformity that BFD delivers.