7.5. Testing the Backup Fence Device Configuration

To check whether the configuration you have defined works as expected, you can first try simply fencing the nodes to see if any issues arise:

# /sbin/fence_node clusternode1.example.com
# /sbin/fence_node clusternode2.example.com
# /sbin/fence_node clusternode3.example.com

To see whether the backup IPMI fencing will work when the primary APC switch fencing does not, disable the ethernet access to both APC switches. This will prevent the fence_node command from being able to access the switches. Then run the fence_node command on each node in the cluster to see whether the IPMI switch takes over and fences the node.