If you are using a load balancer with Platform Services Controller to provide high availability, you must verify that it is supported and configured correctly before upgrading to vCenter Server 6.7.

In environments with less than four vCenter Server systems, use a single Platform Services Controller instance and the associated vCenter Single Sign-On service. In larger environments, consider using multiple Platform Services Controller instances, protected by a network load balancer. The white paper vCenter Server 6.0 Deployment Guide on the VMware website discusses this setup. For current information on maximums, see the Configuration Maximums.

To learn about the use of qualified load balancers that supply high availability, and their requirements between versions of vSphere for use with vCenter Single Sign-On and Platform Services Controller, see Knowledge Base article KB 2112736.



  1. Review the vCenter Server 6.0 Deployment Guide documentation for load balancing information.
  2. If your load balancer is not supported, replace it with a supported load balancer.
  3. Verify that the load balancer is correctly configured based on recommendations in vCenter Server Deployment Guide.