Fixing settings/drivers for Digitus Gigabit Ethernet adapter USB-C / 2023-04-28

I recently bought a Digitus Gigabit Ethernet adapter USB-C, mainly because my work laptop has no wired ethernet connection which I really want sometimes.

As I don't like having Windows-only hardware I did check before ordering that it can also be used with Linux. It contains a Realtek r8152 chip so I searched and found Fixing performance issues with Realtek RTL8156B 2.5GbE USB dongle in Ubuntu - CNX Software which mentions that loading the listed udev rules makes Linux select the right driver and improves performance.

And indeed the 'wrong' driver was chosen initially. I fetched r8152/50-usb-realtek-net.rules at master · bb-qq/r8152 · GitHub like:

root@moore:~# cd /etc/udev/rules.d/
root@moore:/etc/udev/rules.d# wget https://raw.githubusercontent.com/bb-qq/r8152/master/50-usb-realtek-net.rules
root@moore:/etc/udev/rules.d# cd
root@moore:~# udevadm control --reload-rules
root@moore:~# udevadm trigger

And now things are as I wish, the right driver is loaded:

  Device-3: Realtek USB 10/100/1G/2.5G LAN type: USB driver: r8152
  IF: enx3c49deadbeef state: down mac: 3c:49:de:ad:be:ef