About Firepower Interfaces
The Firepower 9300 chassis supports physical interfaces and EtherChannel (port-channel) interfaces. EtherChannel interfaces can include up to 16 member interfaces of the same type.
Chassis Management Interface
The chassis management interface is used for management of the FXOS Chassis by SSH or Firepower Chassis Manager. This interface appears at the top of the Interfaces tab as MGMT, and you can only enable or disable this interface on the Interfaces tab. This interface is separate from the mgmt-type interface that you assign to the logical devices for application management.
To configure parameters for this interface, you must configure them from the CLI. To view information about this interface in the FXOS CLI, connect to local management and show the management port:
Firepower # connect local-mgmt
Firepower(local-mgmt) # show mgmt-port
Note that the chassis management interface remains up even if the physical cable or SFP module are unplugged, or if the mgmt-port shut command is performed.
Each interface can be one of the following types:
Data—Data interfaces cannot be shared between logical devices.
Mgmt—Use management interfaces to manage application instances. They can be shared by one or more logical devices to access external hosts; logical devices cannot communicate over this interface with other logical devices that share the interface. You can only assign one management interface per logical device. For information about the separate chassis management interface, see Chassis Management Interface.
Cluster—Special interface type used for a clustered logical device. This type is automatically assigned to the cluster control link for inter-unit cluster communications. By default, the cluster control link is automatically created on Port-channel 48.
Jumbo Frame Support
The Firepower 9300 chassis has support for jumbo frames enabled by default. To enable jumbo frame support on a specific logical device installed on the Firepower 9300 chassis, you will need to configure the appropriate MTU settings for the interfaces on the logical device.
The maximum MTU that is supported for the application on the Firepower 9300 chassis is 9000.