An engineer is designing a Layer 3 campus network running EIGRP between the core, aggregation, and access layers. The access layer switches will be connected to the aggregation layer using Layer 3…

Bidirectional Forwarding Detection (BFD) is a lightweight protocol that provides rapid fault detection for forwarding paths between devices. Integrating BFD with EIGRP allows EIGRP to be notified of link failures within milliseconds, significantly accelerating convergence time in response to access layer uplink failures compared to EIGRP's default Hello/Hold timers.

Reducing EIGRP Hello/Hold timer values can speed up convergence but has a higher overhead than BFD and might lead to more frequent false positives in an unstable environment; BFD is generally more aggressive and efficient.

EIGRP summarization from core to aggregation layer helps reduce routing table size and improve stability but does not directly speed up the detection of an access layer uplink failure.

EIGRP summarization from access to aggregation layer also helps with scalability and stability by reducing the number of routes advertised upstream but does not directly accelerate the detection of a failure on the access layer uplink itself.