Comment 2 for bug 1915151

Thx Sean for Your input,

I agree that qinq is really different thing than vlan transparency.
So IIUC Your proposal is to do new extension which will be similar to vlan_transparency and will work only for vlan networks. So user can then do something like:

neutron net-create qinq-network --qinq True

And in such case ethtype for such network would be 0x8a88 instead of 0x8100 and user would be able to control directly in VM C-Tag. S-Tag would be still controlled by Neutron, as it is now for vlan networks.
If my understanding is correct, I like that solution :) We can move in that direction IMO.