On Thu, Jan 8, 2026 at 9:10 AM Michael P. Soulier <[email protected]> wrote: > > On 08/01/26 Marco Moock said: > > > What is the reason in your case? > > > > Maybe NM can handle that with a setting. > > The interface is screwing up autonegotiation and falling back to 10mbits. > It's a > Gigabit interface. So I force it to Gigabit using ethtool.
This is the problem you should be troubleshooting. Based on my experience with managing servers, the first thing to do is use the latest software. That includes the latest UEFI and drivers. Second step is, replace the ethernet cable. Faulty cables are more common than expected. It is one of the easiest troubleshooting steps. Thirs, try moving the cable to a different ethernet port on the switch/hub/router. Fourth, disable the problem ethernet port and use another ethernet port on the machine. You may need to add an ethernet card to replace the port. Forcing the port to 1 Gbps or 10 Gbps using software is one of the last things I would try. The problem lies elsewhere. Jeff
