I wanted to run an MPLS cloud across to regional sites that are themselves connected via the service provider's MPLS. I don't want to merge MPLS domains, I want to run our cloud over the top (as you would with any other technology such as MPLS over frame or MPLS over ATM) i.e. MPLS over MPLS. I cannot find any references to this type of setup. Does anyone know if it is possible?