FXOS: Remove a Cluster Node

Temporary Removal

A cluster node will be automatically removed from the cluster due to a hardware or network failure, for example. This removal is temporary until the conditions are rectified, and it can rejoin the cluster. You can also manually disable clustering.

To check whether a device is currently in the cluster, check the cluster status

For threat defense using the management center, you should leave the device in the management center device list so that it can resume full functionality after you reenable clustering.

• Disable clustering in the application—You can disable clustering using the application CLI. Enter the cluster remove unit name command to remove any node other than the one you are logged into. The bootstrap configuration remains intact, as well as the last configuration synced from the control node, so you can later re-add the node without losing your configuration. If you enter this command on a data node to remove the control node, a new control node is elected.

  When a device becomes inactive, all data interfaces are shut down; only the Management interface can send and receive traffic. To resume traffic flow, re-enable clustering. The Management interface remains up using the IP address the node received from the bootstrap configuration. However if you reload, and the node is still inactive in the cluster , the Management interface is disabled.

  To reenable clustering, on the threat defense enter cluster enable .

• Disable the application instance—

• Shut down the security module/engine—

• Shut down the chassis—

Permanent Removal

You can permanently remove a cluster node using the following methods.

For threat defense using the management center, be sure to remove the node from the management center device list after you disable clustering on the chassis.

• Delete the logical device—

• Remove the chassis or security module from service—If you remove a device from service, you can add replacement hardware as a new node of the cluster.