After you have cabled and visually inspected the systems, start your Exalogic Machines and Exadata Database Machines, as appropriate. Refer to the Oracle Exalogic Elastic Cloud Machine Owner's Guide and the Exadata Database Machine documentation for start-up procedures. In addition, Oracle recommends that you verify the InfiniBand topology after connecting multiple racks. For information about verifying the InfiniBand fabric and discovering the topology, see the Oracle Exalogic Elastic Cloud Machine Owner's Guide and the Oracle Exadata Database Machine documentation.