Replace a unit in Firewall Threat Defense high availability pair
This reference explains the process for replacing a failed unit in a Firewall Threat Defense high availability pair, including both backup restore and manual replacement procedures.
To replace a failed unit in the Firewall Threat Defense high availability pair using a backup file, see Restoring Cloud-Delivered Firewall Management Centers and Managed Devices in the Cisco Secure Firewall Management Center Administration Guide.
If you do not have a backup of the failed device, you must break high availability. Then, register the replacement device to the Cloud-Delivered Firewall Management Center and reestablish high availability. The process varies depending on whether the device is primary or secondary: