When setting up Firepower Management Centers in a high availability pair, you configure one Firepower Management Center to be primary and the other as secondary. During configuration, the primary unit’s policies are synchronized to the secondary unit. After this synchronization, the primary Firepower Management Center becomes the active peer, while the secondary Firepower Management Center becomes the standby peer, and the two units act as a single appliance for managed device and policy configuration.
The main differences between the two Firepower Management Centers in a high availability pair are related to which peer is active and which peer is standby. The active Firepower Management Center remains fully functional, where you can manage devices and policies. On the standby Firepower Management Center, functionality is hidden; you cannot make any configuration changes.
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