The Network Discovery settings control how a Coordinator Node is selected. By default, V-Ray Swarm's Network Discovery is set to use auto-discovery.
If the Auto-Discovery option is turned on, V-Ray automatically assigns the machine with the greatest network visibility as a Coordinator and uses it for render-job management. The Coordinator machine is automatically changed if a different computer reports that it can communicate with more nodes than the current Coordinator.
Alternatively, the Network Discovery settings can be adjusted through the V-Ray Swarm web interface.
Coordinator IP – Manually sets a network machine to be the Coordinator which is used for render-job management.