I have set up my DIGI IX14 with a sim card, a correctly configured DHCP server, etc to give me access to the internet my the router. The problem is that on my computer I gain access to the internet and on some of my industrial pcs running ubuntu server 18.04 the ethernet led does not even blink. Sometimes I get it to work until reboot, after that I lose the connection. It's like my DHCP config is not pushed to the industrial pc. I tried anything from resetting the modem to changing the bios and clean installing the pcs.
Any help would be greatly appreciated, thanks in advance!