i have Catalyst 3750.
i want to configure two ports as trunk, which connected to aggrigation ring.
i want those trunks to be able recive all tagged vlans and also transfer MSTP BPDUs between them, without been MSTP member.
i tried configuring those ports with:
switch port mode dot.q tunnel
l2tp tunnel stp
i dont want to use QinQ tunneling.
the BPDUs were transfer OK between the two ports but the Tagged vlans wasn't.
i attached the scenario to make it more clear.