After installing the first NSX Controller in your NSX-T Data Center deployment, you can initialize the control cluster. Initializing the control cluster is required even if you are setting up a small proof-of-concept environment with only one controller node. If you do not initialize the control cluster, the controller is not able to communicate with the hypervisor hosts. In the cluster, you only need to initialize one controller.
Prerequisites
Install at least one NSX Controller.
Join the NSX Controller with the management plane.
Verify that you have admin privileges to log in to the NSX Controller appliance.
Assign a shared secret password. A shared secret password is a user-defined shared secret password (for example, "secret123").
Procedure
What to do next
Add additional NSX Controllers to the control cluster. See Join Additional NSX Controllers with the Cluster Master.