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Palo_Alto_Networks

PCNSE · Question #113

What are two prerequisites for configuring a pair of Palo Alto Networks firewalls in an active/passive High Availability (HA) pair? (Choose two.)

The correct answer is B. The firewalls must have the same set of licenses. D. HA1 should be connected to HA1, either directly or with an intermediate Layer 2 device. Two prerequisites for a Palo Alto Networks active/passive HA pair are: (B) both firewalls must have the same set of licenses-mismatched licenses prevent proper HA synchronization and consistent enforcement; and (D) the HA1 (control link) interface on each peer must connect…

Submitted by alyssa_d· Apr 18, 2026Deploy and Configure

Question

What are two prerequisites for configuring a pair of Palo Alto Networks firewalls in an active/passive High Availability (HA) pair? (Choose two.)

Options

  • AThe management interfaces must be on the same network.
  • BThe firewalls must have the same set of licenses.
  • CThe peer HA1 IP address must be the same on both firewalls.
  • DHA1 should be connected to HA1, either directly or with an intermediate Layer 2 device.

How the community answered

(22 responses)
  • A
    5% (1)
  • B
    91% (20)
  • C
    5% (1)

Explanation

Two prerequisites for a Palo Alto Networks active/passive HA pair are: (B) both firewalls must have the same set of licenses-mismatched licenses prevent proper HA synchronization and consistent enforcement; and (D) the HA1 (control link) interface on each peer must connect directly to the HA1 interface of the other peer, or through an intermediate Layer 2 switch, because HA1 carries heartbeat and configuration synchronization traffic. Option A is incorrect-management interfaces need not share a subnet. Option C is wrong because each firewall has its own unique HA1 IP address; they are configured with the peer's HA1 IP, so the addresses must differ.

Topics

#High Availability#Active/Passive HA#HA Prerequisites#Licensing

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