Requirements and prerequisites for high availability configuration

The two units in a high availability configuration must meet these requirements:

  • Be on a separate chassis; intra-chassis High Availability for the Firepower 9300 is not supported.

  • Be the same model.

  • Have the same interfaces assigned to the High Availability logical devices.

  • Have the same number and types of interfaces. All interfaces must be preconfigured in FXOS identically before you enable High Availability.

High availability is only supported between same-type modules on the Firepower 9300; but the two chassis can include mixed modules. For example, each chassis has an SM-56, SM-48, and SM-40. You can create High Availability pairs between the SM-56 modules, between the SM-48 modules, and between the SM-40 modules.

For other high availability system requirements, see High availability system requirements.