Buenas tardes, me pueden confirmar si es posible configurar QinQ en un equipo Mikrotik RB960GS.
Saludos.
I assume you mean the RB960PGS, a.k.a. the hEX PoE?
Without bridge VLAN filtering support in hardware, if this works at all, it would happen on the CPU, thus be slow.
The lack of the needed hardware feature is documented on the QCA8337 row in this table. The lookup table for switch chips by model is on this page.