PCNSE Practice Question: Managing Troubleshooting and High Availability
An engineer notices that the HA pair is not synchronizing configuration changes. The 'show high-availability sync-status' output shows 'sync-failure'. What is the first step to troubleshoot?
⚠ Common exam trap
The trap here is that candidates often jump to checking the HA2 link (session synchronization) because they confuse configuration sync with stateful session sync, but HA1 is the correct link for configuration changes.
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
✓
Verify HA1 link status and IP connectivity between peers
The 'sync-failure' status on the 'show high-availability sync-status' output indicates that configuration synchronization between the HA peers has failed. The first step in troubleshooting is to verify the HA1 link status and IP connectivity between peers because HA1 is the dedicated control link used for heartbeats and configuration sync. Without a functional HA1 link, the firewalls cannot exchange configuration data, making this the most fundamental check before investigating other potential causes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Verify HA1 link status and IP connectivity between peers
Why this is correct
HA1 is used for configuration synchronization.
- ✗
Disable preemption on the active firewall
Why it's wrong here
Preemption does not cause sync failure.
- ✗
Check the HA2 link session synchronization status
Why it's wrong here
HA2 is for data, not config.
- ✗
Reboot both firewalls to clear the failure
Why it's wrong here
Not a good first step.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNSE practice question is part of Courseiva's free Palo Alto Networks 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 PCNSE exam.