@1808geek If your Linksys MR7500 is configured in bridge mode probably that's even better, cause you can use BE550 full potential as a main router. The easiest way to check if that the case is to...

@1808geek Here's what you can do if you have issues logging router's WebGUI. Here's the difference between router and AP mode.

@1808geek I would use the router's WebGUI on 192.168.0.1 (default LAN IP) or what it's in your case. Here's the guide for setting a router in AP mode - use Case 1.

@1808geek If you're about to use your Linksys MR7500 as your main router, it would be best to set BE550 in AP mode.

@HelpingOne When used in Onemesh / Easymesh setup the RE can't extend the guest or IoT network of the main router. To be able to extend the guest network the mesh feature should be turned off, i.e....

@Gumolin Check your RE bottom sticker for the device firmware region. If it's a (EU) region proceed with the next step. Update the RE firmware to TL-WA855RE(EU)_V5_1.0.13 Build 231115 and the issue...