PCNSE Deploy and Configure Firewalls Practice Question
A company has two Palo Alto Networks firewalls configured in an active/passive HA pair. After a recent maintenance window, the passive firewall fails to synchronize its configuration from the active. The active firewall shows the HA1 link as down. Which two configuration settings must be verified to resolve this issue?
⚠ Common exam trap
Candidates often confuse the roles of HA1 and HA2 links, assuming HA2 is required for configuration sync, or they assume HA1 encryption is mandatory for the link to be operational.
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 the HA1 IP address and port settings, and confirm that the HA keepalive timer is identical on both peers
The HA1 link is used for control-plane communication, including configuration synchronization and heartbeats. If the active firewall shows the HA1 link as down, the most likely cause is a mismatch in the HA1 IP address, port settings, or the HA keepalive timer between the two peers. Verifying and correcting these settings ensures the HA1 link can establish and maintain connectivity, allowing the passive firewall to synchronize its configuration.
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 that the HA2 link is configured and operational
Why it's wrong here
HA2 is for data plane synchronization, not control messaging; the issue is with HA1 link.
- ✗
Ensure that both firewalls have the same session setup mode (e.g., active-active vs active-passive)
Why it's wrong here
Session setup mode does not directly affect HA1 link status; it's about flow distribution.
- ✗
Check that HA1 encryption is enabled on both devices
Why it's wrong here
HA1 encryption is optional; its absence does not cause link down.
- ✓
Verify the HA1 IP address and port settings, and confirm that the HA keepalive timer is identical on both peers
Why this is correct
The HA1 link status depends on correct IP/port configuration and matching keepalive timers; mismatches can cause link down and sync failure.
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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.