@Rosolino After returning the satellite to the factory condition, I connected the main LAN port and the satellite LAN port again via Switch, and the Ethernet backhaul was successfully used. Thanks.

@Joseph-TP Thank you for your reply. Am I correct in understanding that it does not matter if there is a Switch between the Main and Satellite, as long as the packets required for EasyMesh are not...

I use AX80 and AX3000 with the latest firmware. I would like to use EasyMesh with Ethernet backhaul according to the following configuration guide. In this case, the configuration guide says that the...