If you have just deployed vCloud Director over NSX , it may happen that during the creation of a new VCD network, the operations fails with the error “Cannot deploy organization VDC network; Make sure vShield Manager infrastructure is properly configured and there are segment IDs available.” In this case, you need to change the configuration of the NSX transport zones from Multicast to either Hybrid or Unicast.
Virtual To The Core
Virtualization blog, the italian way.