Ethernet port stopped working overnight

The ethernet port on my M1 stopped working overnight, and I am stumped.  I have looked through the other similar threads here, so I made sure the usb-c is set to charge only and the ethernet timeout is turned off.  The power is connected, battery is out.  I am using the charger and cable that came with the unit, so it is not underpowered.  I have tried several ethernet cables and connected it to other devices.  I get a connection light, but the connection doesn't work.  It seems like everything is physically good, but the port is deactivated somehow.  The connection to tmobile is fine.  I can connect with wifi no problem, speed test works fine.  Anything I missed, other than doing a factory reset?