If you upgrade to vCenter Server 4.0 and you want the vCenter Server system to manage ESX 3.x/ESXi 3.5 hosts, you might need to verify that the license server is running and reconfigure vCenter Server 4.0 to point to the license server, depending on your upgrade scenario.

License Server Scenarios lists the license server scenarios and the necessary actions.

License Server Scenarios

Upgrade Scenario

Necessary Action

In-place upgrade from VirtualCenter 2.x to vCenter Server. License server is on the same machine.

None

In-place upgrade from VirtualCenter 2.x to vCenter Server. License server is on a different machine.

None

Uninstall VirtualCenter 2.x. Preserve the license server. Perform a clean installation of vCenter Server with a rebuilt, clean database.

Point vCenter Server to the existing license server.

Uninstall VirtualCenter 2.x and the license server. Perform a clean installation of vCenter Server with a rebuilt, clean database.

Install a new license server, and point vCenter Server to the new license server.

Clean installation of vCenter Server with a rebuilt, clean database. License server was on a different machine.

Point vCenter Server to the existing license server.

Upgrade to vCenter Server using a different machine. The VirtualCenter 2.x system is the source machine. The vCenter Server 4.0 system is the destination machine.

See Upgrading to vCenter Server on a Different Machine and Keeping the Existing Database.

Point vCenter Server to the existing license server.