QinQ across provider network

[ParrotShoes]

I'm in an education setting and we're trying to move a department's equipment across our network.  I'd like to use QinQ but I'm having trouble because I can't use CVLANs where I have SVLANs, so I can only transport the departments traffic, or my own, and I need to do both.  Any advice or a direction to go in? I'm trying to go from a port on an E8212zl across an LACP trunk to an E5412zl, across another LACP trunk to another E5412zl, to the department.

[Richard Litchfield]

Will each one of the intervening switches be confgured for QinQ?

And have you looked at mixed mode?

Depending on the age of your kit, perhaps VXLAN is a possible overlay solution? It is supported in most of the current Gen6 ProVision ASIC based switches.