The correct answer is to ensure the peer-keepalive link uses a dedicated management interface or a separate VRF. This configuration is critical because when the vPC peer link fails, the keepalive link becomes the sole mechanism for the secondary switch to confirm the primary is still alive; without this isolation, a data-plane failure could also disrupt keepalive messages, causing the secondary to falsely assume the primary is dead and activate its own vPC member ports, leading to a split-brain scenario. On the Cisco DCCOR 350-601 exam, this question tests your understanding of vPC convergence and the distinct roles of the peer link versus the keepalive link—a common trap is confusing the two or assuming the keepalive link handles data traffic. Remember the memory tip: “Keepalive keeps the brain together; isolate it to avoid the split.”
350-601 Network Practice Question
This 350-601 practice question tests your understanding of network. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An engineer is troubleshooting connectivity between two Nexus 9000 switches configured with vPC. The vPC peer link is up, but the vPC peer-keepalive link is failing. Which action should be taken to ensure vPC convergence in the event of a peer-link failure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure the peer-keepalive link uses a dedicated management interface or a separate VRF.
When the vPC peer link fails, the peer-keepalive link is used by the secondary switch to detect that the primary is still alive and to avoid becoming the primary (which would cause a split-brain scenario). Using a dedicated management interface or a separate VRF ensures the keepalive messages are isolated from the data plane and remain reachable even if the peer link goes down, allowing the secondary to correctly keep its vPC member ports in a suspended state and maintain convergence.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Ensure the peer-keepalive link uses a dedicated management interface or a separate VRF.
Why this is correct
A dedicated keepalive link ensures reliable communication and prevents split-brain.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable vPC on both switches and reconfigure the port channels.
Why it's wrong here
Disabling vPC is not necessary; the issue is with keepalive.
✗
Reconfigure the vPC domain with a lower priority on the secondary switch.
Why it's wrong here
Priority affects role election, not keepalive failure behavior.
✗
Increase the vPC peer-keepalive hold timeout to 5 seconds.
Why it's wrong here
Increasing hold timeout delays failure detection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that the peer-keepalive link is only for role negotiation during normal operation, when in fact it is critical for preventing split-brain during peer-link failures, and candidates may overlook the need for its isolation from the data plane.
Detailed technical explanation
How to think about this question
The vPC peer-keepalive link uses UDP port 3200 and must be in a separate Layer 3 domain from the peer link to remain operational during a peer-link failure. In a real-world scenario, if the keepalive link shares the same VRF as the peer link, a physical failure of the peer-link interfaces could also disrupt the keepalive path, causing both switches to assume the primary role and flood the network with duplicate traffic (split-brain). Cisco recommends using the management VRF or a dedicated Layer 3 link to ensure the keepalive is always reachable.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-601 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network — This question tests Network — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure the peer-keepalive link uses a dedicated management interface or a separate VRF. — When the vPC peer link fails, the peer-keepalive link is used by the secondary switch to detect that the primary is still alive and to avoid becoming the primary (which would cause a split-brain scenario). Using a dedicated management interface or a separate VRF ensures the keepalive messages are isolated from the data plane and remain reachable even if the peer link goes down, allowing the secondary to correctly keep its vPC member ports in a suspended state and maintain convergence.
What should I do if I get this 350-601 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A Nexus 9000 switch is configured with VPC. The VPC keepalive link fails. What is the effect on the VPC domain?
medium
A.Both switches suspend the VPC VLANs.
B.Both switches continue to forward traffic normally.
✓ C.The secondary switch suspends its VPC member ports.
D.The primary switch becomes orphan.
Why C: In a VPC domain, the keepalive link is used to monitor the liveness of the peer switch, but it does not carry data traffic. When the keepalive link fails, the secondary switch cannot confirm the primary is alive, so it suspends its VPC member ports to prevent a dual-active scenario. The primary switch remains active and continues forwarding traffic normally because it assumes the secondary has failed.
Last reviewed: Jun 11, 2026
Question Discussion
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