@PackersOwner One-to-one NAT guide Multi-nets configuration guide

@2thdr I don't know this one. But I have another tplink poe switch TL-SG2210P, it's not quiet. If you don't want fan noise it's better to choose PoE injector to power on the client devices, and just...

@Heimerize Wow I even don't know CPE has beep on it... I did a little research. Are you on the CPE510 web interface? CPE web interface has Antenna Alignment but it beep through your computer.

@lukass2000 Sometimes the bad Ethernet cable may also make a loop, so it's suggested to check the cable that connected to your switch port 8(according to the picture the loop happens on port 8) And...

@AlexNguyen In theory, all routers support IPSec can build the site-to-site tunnel. However I notice the MR6400 is a 4G router, that means it may not have public IP on the WAN port. You may check...

@urbnsr Try web browser incognito mode.