Each VLAN participating in PVST+ must be in a separate STPD, and the VLAN number (VLAN ID) must be the same as the STPD identifier (STPD ID).
As a result, PVST+ protected VLANs cannot be partitioned.
This fact does not exclude other non-PVST+ protected VLANs from being grouped into the same STPD. A protected PVST+ VLAN can be joined by multiple non-PVST+ protected VLANs to be in the same STPD.
NoteWhen PVST+ is used to interoperate with other networking devices, each VLAN participating in PVST+ must be in a separate STP domain.