@3n3 Try to open the router WebGUI in a browser private/incognito tab (to bypass browser cookies) or another web browser. The operation mode (if exists) should be a section in the Advanced tab:

@paolomn1968 This should be a legit FW release, which is not yet published on your local support portal.

@JordiRisa Grab the satellite router and put it closer to the main one. Use the ethernet cable from its kit (it should be CAT 5E) to connect to the main router. This way you could rule out an...

@JordiRisa Normally the connection betwen the two routers should be main AX58 LAN port <=> satellite AX58 WAN port. Another thing you could do is to connect the two AX58 as LAN port <=> LAN port and...

@JordiRisa It could be a FW glitch but since LAN4 doesn't behave similar it may not be the case. Why would be ridiculous to use 10-meter CAt5E cable, I even use longer of these without any issues.-...

@JordiRisa You can't change the LAN negotiotion speed. What you can do as a test would be changing the ethernet cables (with CAT 5E for example) or use another router's LAN port to test the...