Designing Cisco Enterprise Networks (ENSLD) — Question 169

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 copper connections. The engineer wants to improve the convergence time for access layer switch failures.
Which technique must the design include?

Answer options

• A. enabling BFD for EIGRP on the access layer uplinks
• B. reducing the EIGRP Hello / Hold timer values
• C. EIGRP summarization from core to aggregation layer
• D. EIGRP summarization from access to aggregation layer

Correct answer: A

Explanation

Enabling BFD for EIGRP on the access layer uplinks allows for rapid detection of link failures, significantly improving convergence times. While reducing the EIGRP Hello/Hold timer values can also help with convergence, BFD is specifically designed for faster failure detection. EIGRP summarization does not directly address the need for faster convergence in failure scenarios.