@Kevin_Z Thanks for your quick response. The speed shown on the NICs is allways 1.0 Gbps. Sorry to say, but I can't find the "negotiation speed of the LAN ports" in the Basic-network map. However,...

I have a subscription for 250 Mbps download (/25 Mbps up). When I connect my laptop straight to the cable coming from the modem, Speedtest.org shows the 250/25 Mbps. If I then connect the modem cable...