Assume I have a MikroTik with at least 4 ports. Assume that I must pass ethernet traffic for three separate 802.1q VLANs. Here is the topology:
eth1 = trunk port with untagged traffic (belonging to VLAN ID 1) and also tagged traffic for VLAN ID 2 and VLAN ID 3
eth2 = untagged traffic only port (all traffic in/out belongs to VLAN ID 2)
eth3 = untagged traffic only port (all traffic in/out belongs to VLAN ID 3)
eth4 = untagged traffic only port (all traffic in/out belongs to VLAN ID 1)
Assume that ports 2-4 MUST only pass untagged traffic in/out and that traffic must ONLY be to/from the assigned VLAN.
Assume that port 1 MUST carry VLAN traffic for all three VLANs, but VLAN ID 1 traffic MUST be untagged--assume that there is no other way to do it.
Is there any possible working MikroTik RouterOS configuration that would function as required by all of the above assumptions?
PLEASE, if you don't know the answer to this question, don't propose an alternate topology and give a suggested configuration for it. I am not interested it alternative topologies nor alternate questions. Only the above proposed topology.
To my own knowledge, the answer to the question currently is NO, RouterOS cannot do this, therefore I must use another device. (A Cisco 2955 switch can do this very easily, but it's a true switch.)