I am running into an issue on the BeagleBone Black Industrial Rev on Kernel 5.10 where the ethernet doesnt start up on every boot. I found this https://forum.digikey.com/t/ethernet-device-is-not-detecting-on-ubuntu-20-04-lts-on-bbg/19948/22 which mentions I either need to use an older kernel, or use a newer board.
https://docs.beagleboard.org/latest/boards/beaglebone/black/ch02.html
In late 2021, there was a HW rev to fix this ETH issue.. Have these boards from element14 not been updated with these revisions?