Upgrading vCenter Server
Keep in mind that the vCenter Server architecture has changed in vSphere 6. Refer back to Chapter 3, The Management Layer - VMware vCenter for more information.
Upgrade Paths
An infrastructure's vCenter Server 5.1/5.5 configuration will determine its configuration post-upgrade. If the outcome is not desired, consider installing a new vCenter Server rather than completing an in-place upgrade. However, if the vCenter Server is 5.0, there is no Single Sign-On installed and configured, therefore an option will be presented to choose whether the vCenter Server 6.0 configuration should be embedded or external.
The following image demonstrates a vCenter Server 5.1 or 5.5 simple installation, where all components were installed on the same system. When upgrading to vCenter Server 6.0, the outcome will result in an embedded configuration (with the vCenter Server and Platform Service Controller components co-installed on the same system).
On the other hand, if the vCenter...