High Availability Support on Threat Defense Devices in a Remote Branch Office Deployment
In a remote branch office deployment, the data interface of the threat defense device is used for Cisco Security Cloud Control management instead of the Management interface on the device. Because most remote branch offices only have a single internet connection, outside Security Cloud Control access makes centralized management possible.
You can use any data interface for Security Cloud Control access, for example, the inside interface if you have an inside Security Cloud Control. However, this guide primarily covers outside interface access, because it is the most likely scenario for remote branch offices.
Security Cloud Control provides high availability support on the threat defense devices that it manages through the data interface. This feature is supported on devices running on software version 7.2 or later.
For more information, see Firepower Threat Defense Deployment with a Remote FMC in the Cisco Firepower Getting Started Guide.