Fence devices that are in use cannot be deleted. To delete a fence device that a node is currently using, first update the node fence configuration for any node using the device and then delete the device.
To delete a fence device, follow these steps:
From the configuration page, check the box to the left of the fence device or devices to select the devices to delete.
Click and wait for the configuration to be updated. A message appears indicating which devices are being deleted.
When the configuration has been updated, the deleted fence device no longer appears in the display.