After an upgrade from ESX4.X to ESXi5.0 you notice that your Port Group named "Service Console" is missing. Where has it gone?
During the upgrade all Port Groups are moved to Distributed Switches.
During the upgrade all Port Groups are moved to Standard Switches.
During the upgrade all Port Groups are removed. The Service Console Port Group will need to be recreated.
Because ESXi 5.0 has no service Console, upgrading from ESX 4.x to ESXi 5.0 removes the Service Console port group.