Determine the number of Exalogic machine racks that you will connect.
See the appropriate section in this guide for a table that provides connection details for each supported multirack cabling option. Print the applicable chart, so you can have it readily available.
The system naming conventions are as follows. "R" indicates an Exalogic machine rack or an Exadata Database Machine rack. For example, R1 indicates rack 1. "U" indicates the unit height in the rack. For example, U24 indicates rack unit 24. U1 is located at the bottom of the rack, and U42 is at the top of the rack. For more information about Exalogic machine rack layout, see the Oracle Exalogic Elastic Cloud Machine Owner's Guide.