What is exchanged through the HA2 link?

The correct answer is C. session synchronization. Data Link - The HA2 link is used to synchronize sessions, forwarding tables, IPSec security associations and ARP tables between devices in an HA pair. Data flow on the HA2 link is always unidirectional (except for the HA2 keep-alive); it flows from the active device to the…

Submitted by andres_qro· Apr 18, 2026Core Concepts

Question

Options

Ahello heartbeats
BUser-ID information
Csession synchronization
DHA state information

How the community answered

(43 responses)

A
2% (1)
B
2% (1)
C
88% (38)
D
7% (3)

Explanation

Data Link - The HA2 link is used to synchronize sessions, forwarding tables, IPSec security associations and ARP tables between devices in an HA pair. Data flow on the HA2 link is always unidirectional (except for the HA2 keep-alive); it flows from the active device to the passive https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/high-availability/ha-concepts/ha- links-and-backup-links

Topics

#High Availability#HA links#Session synchronization

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