Bad performance on Proxmox with Realtek NICs and/or virtIO Bridge

[jclendineng]

Now, finally I got my new device with Intel NICs from china.
It has the exact same CPU and RAM config.

Now I cloned the System 1:1 to the new device and assigned the NICs.

I get full gigabit now!

@franco
So I think it is an issue with the new realtek driver.

Be careful with those Chinese nics, usually they are samples or just mis-branded.  I have one of those and it works well, but the "intel" nics show up as Realtek in the interface overview but it works without the re drivers so they are clearly intel-ish.  Just saying, Chinese electronics are a black hole of false advertising, just be aware.  I have some interesting stories of weird CPU engineering samples I have from stuff like that

[mater]

Yes, but in OpnSense 21.7 I didn't have that issue with the same Realtek NICs.

So yes, Intel NICs are better in this regard