Network HELL! Establishing a P2P link via 10GbE in a single direction only.
Network HELL! Establishing a P2P link via 10GbE in a single direction only.
Asus Rampage VI Extreme and Asus Zenith Exetreme Alpha connected via Ubuntu 20 and Windows 10 with direct Cat6A link. Large packets and MTU 9000 cause slow performance. Ethtool displays settings for enp9s0: supported ports, link modes, pause frames, auto-negotiation, FEC modes, and speeds ranging from 10000Mb/s to 5000Mb/s.
It seems like you’re observing what you expect. Both upgraded hardware and a fresh Windows 10 installation on a brand new machine produced comparable outcomes. Linking to host god.lan on port 5201 (local 192.168.1.253 → 192.168.1.1:5201) worked well, with several metrics ranging from 0.00 to 1.00 seconds and speeds between 1024 MB and 1009 MBytes per second. The transfer rates varied across intervals, showing consistent performance within the specified ranges.
Ok yeah I did iperf on my server and got 28GB/s back to itself Then I did it with the windows machine only 6GB/s. I think I narrowed like you said to the Windows. Get lame speed on my 1GB port too with transfers at 80MB/s and bumpy. I disable all offloads and bupkis. My Laptop with a USB-3 NIC works great oddly.
It wasn't the case for me either—I installed it fresh on a brand new Ryzen 5950X, but it still caused issues. Running Linux on the same hardware worked perfectly, yet my other laptops and desktops faced the same problem. Even over WiFi, the connection speed felt much slower than before. I also noticed the issue persisted on Windows 11, which I had hoped was a resolved problem.
I’m interested in testing Windows Pro for Workstation because it offers more unlocked hardware capabilities.
Also important to mention is that I disabled interrupt moderation not only on my Linux system but also on the Linux box. Simply shutting it down on Windows wasn’t sufficient; disabling it on my NAS was what enabled me to achieve solid downstream speeds to the Windows machine, albeit at the expense of increased CPU usage on my NAS.