VTP - Pruning the Extended VLAN ID Range

The extended range of VLAN IDs cannot be pruned using VTP of any version. The reason extended VLANs cannot be pruned, even in VTPv3, boils down to a combination of historical design choices, backward compatibility, and the technical complexity of managing such a large VLAN range. While it might seem like an odd restriction, it’s rooted in practical considerations about how VTP was developed and the environments in which it is used.

https://forum.networklessons.com/t/vtp-version-3/1225/62?u=lagapidis