How to create a Q-in-Q or 802.1ad double-tagged interface on a Mikrotik Router: Stripped down 802.1ad packet: DST-MAC | SRC-MAC | 802.1Q outer | 802.1Q inner | PAYLOAD /interface vlan add interface=ether1 name=outervlan vlan-id=600 add interface=outervlan name=innervlan vlanid=1500 The router will strip the outer vlan tag to expose the inner vlan. vlan 1500 is essentially tunnelled using the outer vlan (600) across the provider network.