VLAN range with Q-in-Q

Hi,

I’m trying to figure out how do specify a VLAN range for an inner VLAN on Mikrotik. For Cisco, it would just be: “encapsulation dot1Q 1518 second-dot1q 2-1000”. The reason being that an upstream provider hands off services on incremental inner VLANs, and I don’t want to have to add each one manual with a PPPoE server. Anyone managed to achieve this?