@FaustoSchiavone Your problem is that RE450 v3 doesn't support OneMesh feature. It is supported on RE450 v4 and above - details.

@fogroach Usually the MAC address of the router is printed on its bottom sticker. Check your old router bottom sticker for its MAC address.

@Parkway Try here:

@ArnanC In that case it's probably a HW issue and you probably should contact your local support for help.

@AshHudson88 TL-WA850RE supports only 2.4 Ghz band according to its tech specs - details, On the other hand make sure that you're with its latest firmware v1.0.13 - here.

@ArnanC If you don't have anything plugged in LAN 4 its status would be like in your screenshot. In LAN 2 you probably have plugged a device which can't sync on 1000mbps bandwidth. Plug that device...