You use the vSphere Client or the vSphere Web Client to adjust existing prefix-based or range-based parameters.

If you are changing from one type of allocation to another, for example changing from the VMware OUI allocation to a range-based allocation, use the vSphere Client or the vSphere Web Client. However, when a schema is prefix-based or range-based and you want to change to a different allocation schema, you must edit the vpxd.cfd file manually and restart vCenter Server.