Mixed VLANs.

Hi all.
I have problem with RB750 (Atheros 7240 based). I’ve got ethernet cable with untagged packets (let’s name it ‘Internet’), and tagged packets (let’s name it ‘IPTV’).

I would like to achieve splitter configuration. Untagged data from ethernet (connected to for example port 1) stays untagged and propagate to port 2,3,4. And tagged data from vlan propagate to port 5 and should be untagged. I want to connect STB to port 5, and get access to tagged VLAN with IPTV, and connect PC to any other port and get Internet access from untagged vlan.

Of course that configuration works separately. I can bridge 4 ports and get access to untagged vlan on 4 ports or create vlan interface on port 1, and bridge it to port 5. Is it possible to combine and use it together?

Thanks in advance.

Best regards, Artur.

what’s problem with creating two bridges?..
bridge1: ether1, ether2, ether3, ether4
bridge2: vlan1, ether5