@TP-Link It's the source of the problem however I don't know how but without IPTV/VLAN configured the router doesn't connect to the internet. This is due to my ISP probably, without changing anything...

I have two Deco M4 mesh system. Main one is connected to WAN at port 1. I want to use the second port to connect to my network for a wired only device. However since I think it's on router mode, it...