@garzew You could do that with ER605 (TL-R605) router for example. Go through this thread if your 5G connection is with limited traffic.

@Ayan2127 The setting of the satellite router are copied from the main router and you can't change them.

@SonJim Yes, that's correct. You can see that in the AP mode guide (Case 1) - here. Your LAN1 port is 1000 mbps which is correct as well - no need to change cables. It seems that the issue is...

@SonJim You can check tha negotiated speed of the C6 in AP mode on your main router C6 WebGUI here: Lets say that you've connected the C6 in AP mode to LAN3 port of your main router. Check if its...

@Henrik_Eronen Yes, you can do that and you should if you want to use an ethernet backhaul between the two routers. Here's the public beta v1.2.6 that you can use as well. Keep in mind that if you...

@MasterPiece572 In such case I would RMA the router - contact your retailer and ask for assistance on that.