Is it possible to configure backup links for the HA3 link in A/A HA deployments?

In Active/Active (A/A) High Availability (HA) deployments, the HA3 link is specifically utilized for state synchronization between the devices involved. This mechanism encompasses the sharing of session information, which is crucial for maintaining consistent traffic flow across the HA pairs.

The nature of the HA3 link means that it is not designed to have backup links configured. Instead, the architecture relies on a single HA3 link to ensure efficient and immediate communication between the units. Having additional backup links would complicate the synchronization process without providing a distinct advantage. The design philosophy behind A/A deployments focuses on maintaining simplicity and sufficient reliability in the primary HA3 link to handle state sharing effectively.

While various firewall models may exhibit different capabilities and configurations, the standard understanding remains that the HA3 link should operate as a single, reliable connection, thereby affirming the notion that backup links are not an option for this particular setup. Consequently, the answer reflects that backup links simply cannot be configured for the HA3 link in A/A HA deployments.