I have a few Dell 6224 and a bunch of 3524's and some 5324 - with the latest firmware.
I need to configure QinQ between ports, conveniently called "Customer port" on the 35xx and the 53xx, and it works like a charm there, can even do the config right from gui - set the port to customer mode, and tag the vlan to use for the transport. (ingress data tag data is ignored and a outer heading added for transport, egress strips the outer tag).
But, the 62xx will not play nicely - it has what is called "double-vlan" or dvlan-tunnel, which is supposed to provide the same features. The manual is junk and support havent provided an answer in days now. The best online info I could find was at http://en.community.dell.com/support-forums/network-switches/f/866/p/19265885/19563705.aspx but that still doesnt tell me the correct way of using dv-lan tunnel - as soon as I enable it on any interface, all other trunks stops forwarding.
Does anyone know how to configure this correctly without bringing down the rest of the switch, when you have a mix of normal q-tags and need some q-in-q for just a port or two?