Huawei Certified ICT Expert – Data Center Network (HCIE-DCN) — Question 3

Regarding the cause of the dual-master failure of the VRRP backup group, which of the following is the most unlikely?

Answer options

• A. The link that transmits the VRRP notification message is faulty
• B. The low-priority VRRP backup group discards the received VRRP notification packets as illegal packets
• C. The VRRP backup group IDs on both ends are different
• D. Master device sends 1 notification message per second

Correct answer: D

Explanation

The correct answer is D because sending one notification message per second is a standard practice and would not cause a dual-master situation. Options A, B, and C are all valid scenarios that could lead to dual-master failures, as they involve issues with the communication link, packet processing, or configuration mismatches.