NSE7 Troubleshooting and Diagnostics Practice Question
An HA cluster of two FortiGates is experiencing split-brain. After investigation, you find that the heartbeat link is down on the primary unit. Which action will resolve the split-brain condition?
⚠ Common exam trap
It's easy for candidates to assume split-brain requires a full HA reset or priority adjustment, when in fact the most direct and least disruptive fix is to restore the failed heartbeat link that caused the condition.
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
✓
Restore the heartbeat link by checking cables, interfaces, and VLAN configuration
Split-brain occurs when HA peers lose heartbeat communication and both assume the primary role. Since the root cause is a failed heartbeat link on the primary unit, restoring that link (checking cables, interfaces, VLAN configuration) re-establishes the control channel, allowing the cluster to negotiate roles and resolve the split-brain condition without disrupting services or requiring a full HA reset.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disable HA on both units and re-enable
Why it's wrong here
Disabling and re-enabling HA on both units resets the cluster state but does not restore the failed heartbeat link on the primary unit; the split-brain condition will recur immediately after re-enablement because the heartbeat path remains broken. This action is tempting because it is the correct recovery procedure when HA configuration corruption or a transient software fault causes the split-brain, not when a physical or logical link failure persists.
- ✓
Restore the heartbeat link by checking cables, interfaces, and VLAN configuration
Why this is correct
Split-brain is caused by heartbeat failure; restoring the link resolves it.
- ✗
Increase the HA priority on the primary unit
Why it's wrong here
Priority doesn't matter if heartbeat is down; both units already think they are primary.
- ✗
Reboot the secondary unit
Why it's wrong here
Rebooting doesn't fix the heartbeat link; split-brain may reoccur.
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JA
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.