@bgold, I just wanted to explore a bit further any log messages in NetworkManager related to DHCP. Roman had pointed out that:
NetworkManager logs we can see a line
dhcp4 (eno1): activation: beginning transaction (no timeout)
So it looks like the device is behaving as expected: is starts DHCP negotiation. However, there are no any other log records on further DHCP activity.
But the logs were a screenshot, at the bottom of which it says “lines 28-93/93”, so I wonder if there were additional DHCP log messages in the following screens. Also, it might be worth it to check whether your routers have any logs that could be inspected as well, perhaps searching for the MAC address of the NUC’s network interface (looks like 94:c6:91:a0:82:46)…
If we are assuming it is a DHCP issue, and we found that the NUC initiates a DHCP request but fails to complete it, it would be interesting to sniff the network and check where DHCP handshake packets are missing – if the router fails to reply, or if the NUC fails to process a reply: http://www.eventhelix.com/Realtimemantra/Networking/dhcp-flow/dhcp-sequence-diagram.pdf
Sadly, the sniffing setup may not be trivial in this case…