Update = Resolved After completing troubleshooting, a DELL-Cares agent setup a part replacement.
I've got a brand new Precision 5570 with Windows 11 and a WD19TBS docking station. I thought I'd get the Thunderbolt one - the latest specs to go with my shiny new laptop which has two thunderbolt and one USB-C port. I'm currently on dock number three - none of them will admit to having an Ethernet interface. I can use a D-link travel hub with ethernet - this works whether plugged into the PC or the dock, either the USB-C or Thunderbolt ports. Device manager will see that there is a network interface, and all is fine. But the PC will not acknowledge the ethernet interface on the dock itself. Network lights are blinking away. Latest drivers and dock firmware are installed, but 3 different docks all have the same problem. I checked before purchase - the WD19TBS is listed as being compatible. Any ideas? This is basic stuff, it can't just be me having this problem and it seems unlikely that 3 docks all have the same hardware issue. Maybe there is some setting somewhere I'm missing?
Precision 5570, W11, WD19TBS dock, no wired ethernet