One of my x20 out of 3 (this is the main) recently shows intermittent red light and produce slightly audible high pitch sound. The log is here: pastebin (dot) com/8F0rY0qE Please help to advice. Do I

Hi there. I'm planning to setup deco mesh at my home and wondering if the second port can be used as a wire bridge? Like following all wired topology: Modem---main router---main deco(AP mode)---pc