@BoKuRyu the solution for me was buying a new cable, unfortunately, but now I get the correct speed and can use Tether without problem.

@Tony I'll try but I highly doubt that's it because if I connect the same cable directly into ISP it shows me 1 Gbps of negotiation speed.

@Tony Unfortunately it didnt work :( ... I know the cable is fine because i get the correct speed connecting it directly to ISP, dont know what to do

Good morning! My AX50 is limiting LAN speed to 100 Mbps as shown in the image below from windows ethernet status. Connecting the cable directly to modem or using 5Ghz Wifi gives me the correct speed,...