Problem with USB Ethernet Adapter

[Dexter23]

Hi everyone
Today customer call me because they are without internet access, pve have 2 ethernet nic adapter and one of each is an usb ethernet adapter key.
And i noticed in /var/log/syslog this:

From what i see the usb key has been disconnected for unknown reason apparently and then is reconnect back with device number "3" before the number was "2".
Did you guys figured out which could be the cause of that?

Thanks

 

[leesteken]

Some USB controllers have issues with some USB devices. Using a different port (on a different controller) might help. Updating firmware and drivers might help. Putting a (powered) USB hub in between might help. Also disabling USB power management might help (if I remember correctly from some thread on this forum).

 

[Dexter23]

@leesteken Hi thx for answering.
This setup has been running for 2 years and never have this problematic before, so i don't think is cause by "usb controllers" with this "usb devices".
Anyway the fact is disconnecting i don't get why and it's reconnect with a different device number.
I keep monitoring

 

[leesteken]

This setup has been running for 2 years and never have this problematic before, so i don't think is cause by "usb controllers" with this "usb devices".
Anyway the fact is disconnecting i don't get why

I had no idea that it worked fine for years. Did anything change what might be related? Proxmox (kernel) update for example just before it started (which might indicate a driver bug)? Or firmware updates. Otherwise it might just be aging hardware (on either end) causing a weak connection somewhere, which is hard to fix with a software setting.

and it's reconnect with a different device number.

The device numbers always increase; this is normal.

 

[Dexter23]

Hi could be the kernel update, but check the apt log file the last update was 2-3 weeks ago, btw i keep monitoring.