# Crossbar Mode Configuration

Device > Configure > Crossbar Mode Configuration

This dialog box provides information on the crossbar mode configuration for this device. The following data is displayed:

- Bus only Mode (Cc6kxbarFallbackMode)

- Truncated Mode (Cc6kxbarTruncatedModeAllowed)

Note: Only devices with Supervisor 2 and Crux modules installed support crossbar mode configuration.

Do one of the following:

- Click OK to continue.

- Click Apply to save the changes in the dialog box.

- Click Cancel to close the dialog box.

- Click Refresh to update the contents of the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

Bus only Mode (Cc6kxbarFallbackMode)

Controls system fallback to bus only mode after loss of switching fabric module:

- When this object is set to "true", the system adjusts the switching mode of supervisor and line cards automatically without resetting after the last fabric card is removed.

- When this object is set to "false", all ports in this system are disabled after the last fabric card is removed.

Note: With this feature enabled, the device might lose traffic while the switching mode is being changed.

Truncated Mode (Cc6kxbarTruncatedModeAllowed)

Specifies whether truncated mode is enabled on this device. The value "true" indicates that truncated mode is enabled and that the switching mode for each fabric-capable module present in this system is set to "Crossbar mode".