When using BFD in a network design, which consideration must be made?

While BFD can integrate with First Hop Redundancy Protocols (FHRPs), its most significant and widespread application for overall network convergence is with dynamic routing protocols, making this choice too narrow.

BFD is designed to be very lightweight and is generally less CPU-intensive than reducing native routing protocol hello and hold timers to excessively low values for fast detection.

BFD is commonly integrated with dynamic routing protocols such as OSPF, EIGRP, and BGP to detect forwarding path failures in sub-second timeframes, significantly accelerating network convergence.

BFD's function is rapid failure detection, whereas Nonstop Forwarding (NSF) and Graceful Restart are mechanisms that allow a router to continue forwarding data during control plane restarts, serving a different purpose.