The control plane consists of the controller nodes that eliminate the need for multicast support from the physical network infrastructure to manage VXLAN-based logical switches. A minimum of three controller virtual machines is required for high availability.
To deploy controller nodes, go to Networking & Security | Installation, and under the Management tab click the + symbol in the NSX Controller nodes section:
VMware recommends that you add three controllers for scale and redundancy. Controller cluster virtual machines employ a slicing mechanism, that is, all of them are active at any given time. If a controller virtual machine fails, the tasks failover to the other active peers. This is done by means of a master controller that is elected by means of a majority vote. To maintain this majority it is always recommended...
