Throughput on WAN took a noose dive back in Dec

[meyergru]

I know. I edited in parallel and now augmented my post.

[nullspace]

post #3 I state that I'm using proxmox also I noted the NIC hardware I was using which is all intel, i266V and X553. No realtek. It has 8GBs of RAM. All suggested tunables were configured on this more than a year ago. This is system has run very well for around 2+ years and I kept it up to date weekly.

Please note I'm now fully on X553 NICs for WAN and LAN. They are shared to the VM via passthrough on proxmox (host). It is still slow for incoming bandwidth... upload looks to be back to normal. ( ~300 Mbps Down ( this should be 2000 Mbps) , ~280 Mbps up). I changed nothing on the device all last year except the firmware and only some where in the 4th quarter of 2025 did it drop off a cliff.