Ubuntu 24.04.2

Hello Steven,

Which version of Proxmox VE is used? This would be helpful with reproducing this issue,

Sorry...I am using Proxmox 8.3.4.

could you please provide output of:

cat /sys/class/net/ens18/speed 

from this ubuntu system?
since its sys file, you might need to run it from root level or use "sudo"
before running this command, change interface type to "VitrlO"

Here you go...

Hey Steven,

In proxmox by default there is no speed limit on the VirtIO network interface. The speed of that interface can be even 50Gb/s if you've got enough RAM and your hypervisor host have the supported NIC. Therefore i don't think there's bug anywhere here.

When i run my VM's on proxmox, and have the VirtIO NIC model selected, it shows it's speed to around 10Gbits. So it seems to me everything's as its supposed to be.

If you need to set the limit on the interface to show some value like 1Gb/s, just pick a different NIC model in VM settings, or set the limit in the "Rate limit".

So when you look at your information it shows -10000000? Dont you think that is just crazy to show? Why cant the software interpret that and show 10Gb/s? This may not be a bug but its certainly not something you should have your clients try to decipher.

Indeed, in all of my VM's with "VirtIO (paravirtualized)" interface it also shows an error in Zabbix.

But that's not the Zabbix fault, the `cat` of network interface speed with response '-1' simply means "Unsupported".

root@imaginary$ cat /sys/class/net/ens18/speed
-1 

It's not the Zabbix fault that it can't understand the value - if the OS also don't understand what's going on.
The reason why it's working that way is because Linux kernel can't query the actual speed, because it's a virtual interface - there's no real physical layer or negotiation happening.

And Zabbix is simply doing same thing which that `cat` does.
Check below:

Also even if we'd multiply the '-1000000' by -'1' to get '1000000', that will be '1000000 bps', which is merely 1Mbps after unit conversion.

I mean, cosmetically you can fix that by doing some somersaults in preprocessing, but it won't show you the real IF speed.

So I suggest to either choose any other Interface type in Proxmox, or well - you could also ask ChatGPT how to 'workaround' that, but every 'workaround' is pure cosmetics, trust me (or not).

Don't mind me, I'm closing that issue, because.. there's just no issue, and I also trust that my explanation above is just enough.

BR