Wan2lan or how to make just a switch from openwrt?

Question

Computer networks

There is a home router on openwrt. Interfaces: 4 lan, 1 wan, 1 wifi. How to make it so that there would be 5 lan, 1 wifi, i.e. just a switch (I really need 1 free port) and an access point?
I assume that the switch section needs to remove vlans.
It's enough? Or do you need to write something else somewhere?

Answer 1

Often in openwrt, the physical LAN ports are defined as eth1, and the WAN port as eth0. Therefore, you need to:
1. Go to Network - Interfaces and delete the WAN interface.
2. In the same place on the LAN interface, click Edit, go to the Physical settings section and add checkmarks so that you have them opposite eth0, eth1 and wlan0 (Wireless network). Thus, you will combine all 5 wired ports and a wireless interface into one bridge. That is, get a regular switch without a WAN port.
3. Go to vlan settings and disable as you planned.