Must subscriptions be purchased for both devices in a high availability pair?

In a high availability configuration, both devices in the pair typically require their own subscriptions. This ensures that both the primary and secondary devices have access to the same level of support, updates, and features necessary to function optimally in tandem. Each device needs to be fully operational and able to handle its designated roles effectively, even if the primary device is the one actively processing traffic at any given time.

Having separate subscriptions for each device in a high availability setup guarantees that both can independently receive updates and patches, ensuring continuity in threat protection and system performance. Additionally, this approach helps maintain compliance with licensing agreements, which often stipulate that all active devices need to be licensed without exception. Therefore, both devices must be adequately supported and maintained, which confirms that purchases must be made for both devices in the high availability pair.