You need to ask Turris since you're running their software.
If it is regular DSA, the configuration would go something like this:
- Connect to the router by wifi so you don't lose contact while reconfiguring the Ethernet.
- Move the wan port into the same bridge with all the lan ports. All ports on the same hardware switch should be in the same bridge.
- Set up bridge-vlans to differentiate the lan and wan functions. The wan vlan number must be 2014 to match what the ISP hardware requires. The lan number can be any other number 1-4094, usually 1 is used.
- In the lan bridge-vlan, turn on the ports that will be connected to ordinary LAN devices like desktop computers to untagged. These are off in the wan bridge-vlan.
- In the wan bridge-vlan, make the port that goes to the modem and the one that goes to the TV box tagged. These are off in the lan vlan.
- Attach the lan interface device as br-lan.1 and the wan to br-lan.2014. Do not refer to the ports directly in any interface configurations.