vCloud Director depends on vShield Manager to provide network services to the cloud. Install and configure vShield Manager before you begin installing vCloud Director.
You must associate each vCenter Server that you add to vCloud Director with a unique instance of vShield Manager. For information about the network requirements and supported versions of vShield Manager, see vCloud Director Hardware and Software Requirements.
This procedure applies only to new installations of vCloud Director. If you are upgrading an existing installation of vCloud Director, you can optionally upgrade its associated vShield Manager installation. A new release of vShield Manager cannot work with an existing release of vCloud Director. See Upgrade vShield Manager.