Explanation/Reference:
Configuring Clustering
1. Connect power and at least one Ethernet cable to each appliance.
2. (D) Cable together the cluster interconnect controllers as described below under Node Cabling. You can also proceed with cluster setup and add these cables dynamically during the setup process.
3. (B)Cable together the HBAs to the shared JBOD(s) as shown in the JBOD Cabling diagrams in the setup poster that came with your appliance.
4. (C)Power on both appliances - but do not begin configuration. Select only one of the two appliances from which you will perform configuration; the choice is arbitrary. This will be referred to as the primary appliance for configuration purposes. Connect to and access the serial console of that appliance, and perform the initial tty-based configuration on it in the same manner as you would when configuring a standalone appliance. Note: Do not perform the initial tty-based configuration on the secondary appliance; it will be automatically configured for you during cluster setup.
Etc.
References: https://docs.oracle.com/cd/E51475_01/html/E52872/godjv.html