Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 33

Which of the following settings could prevent two potential EIGRP neighbors from becoming neighbors? (Choose two answers.)

Answer options

• A. The interface used by one router to connect to the other router is passive in the EIGRP process.
• B. Duplicate EIGRP router IDs
• C. Mismatched Hold Timers.
• D. IP addresses of 10.1.1.1/24 and 10.2.2.2/24, respectively.

Correct answer: A, D

Explanation

Option A is correct because if one router's interface is set to passive, it won't send EIGRP packets, preventing neighbor formation. Option D is correct as the IP addresses must be in the same subnet for neighbors to communicate, and these addresses belong to different subnets. Options B and C do not directly prevent neighbors from forming; identical router IDs can occur in different networks, and mismatched Hold Timers typically do not prevent adjacency but may lead to instability.