Hi,
I recently updated my internet contract to 2,5G, and I can speedtest up to 0,9G with a CAT6 cable from a 2,5 switch to my 1G NIC on PC.
As soon as I connect the same cable to a transceiver on my 10G SFP+ NIC on proxmox server, I begin to get up to 0,5G.
Also, I cannot get more if I connect...