NSE7 Troubleshooting and Diagnostics Practice Question
When testing HA failover, you manually switch the primary unit to standby. The secondary unit becomes primary but does not take over the IP address of the virtual cluster. What is the MOST likely cause?
⚠ Common exam trap
A common mix-up: candidates assume all HA modes automatically transfer a virtual IP during failover, but Fortinet's load-balance mode explicitly requires a virtual cluster IP configuration for that behavior, and without it, the IP remains static on the original primary unit.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The HA mode is set to 'load-balance' without a virtual cluster IP
In an HA cluster configured in load-balance mode, the virtual cluster IP address is not automatically transferred during failover unless a virtual cluster IP is explicitly configured. When the primary unit is manually switched to standby, the secondary unit becomes primary but lacks the virtual cluster IP assignment, so it cannot take over that address. This is the most likely cause because the virtual cluster IP is essential for client traffic to reach the active unit in load-balance mode.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Session pickup is not enabled
Why it's wrong here
Session pickup affects session synchronization, not IP takeover.
- ✗
The HA interface monitoring is disabled
Why it's wrong here
Interface monitoring affects failover triggers, not IP takeover.
- ✓
The HA mode is set to 'load-balance' without a virtual cluster IP
Why this is correct
In load-balance mode, the virtual IP is not automatically taken over; it must be configured.
- ✗
The HA cluster is in split-brain
Why it's wrong here
Split-brain would cause both units to be primary, not one.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This NSE7 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE7 exam.