Need advice on how to troubleshoot this:

 

I got a replacement AsrockRack W680D4U 2TLT/g5 board due to some accidental damage I incurred on my original (identical model) while replacing my CPU. The original configuration ran perfect for over a year, and the current Unraid version on my licensed flash drive is 6.12.14. After replacing the board and reconnecting everything, I tried booting into my original unraid stick but it kept giving itself a self assigned IP.
 

So I decided to take a step back and flashed a separate USB stick with the same version of Unraid (6.12.14), but that ran into the same problem: self assigned IP. Then to verify the LAN was working I booted into Linux Mint from a yet another USB stick: that connected fine to internet, no issues.

 

Then I tried the latest version of Unraid on the another USB stick, 7.0.1, and shockingly, that worked fine. It acquired an IP from my DHCP server and I got into the web gui no problem.

 

i don’t want to upgrade my primary Unraid config to the latest version yet for plugin compatibility reasons, so I’m trying to understand what’s going on that even a new flash with 6.12.14 or 6.12.15 doesn’t get DHCP or connect to my LAN? Where would I begin?

Edited March 8, 20251 yr by Notwist
Added info, organized thoughts

You will need to blacklist the virtual IPMI NIC driver, 7.0.1 does by default, see here:

https://forums.unraid.net/bug-reports/stable-releases/61214-no-network-after-updating-eth0-assigned-to-virtual-usb-nic-cdc-ethernet-device-with-169-ip-instead-of-mellanox-10gbe-nic-r3407/#findComment-31251

 

1 hour ago, JorgeB said:

You will need to blacklist the virtual IPMI NIC driver, 7.0.1 does by default, see here:

https://forums.unraid.net/bug-reports/stable-releases/61214-no-network-after-updating-eth0-assigned-to-virtual-usb-nic-cdc-ethernet-device-with-169-ip-instead-of-mellanox-10gbe-nic-r3407/#findComment-31251

 

Your timing is perfect, I literally just stumbled on that thread a couple hours ago and fixed the issue. Thank you for the help.

 

for anybody having this problem, the fastest fix was just renaming the primary NIC with the MAC address I was using to “eth0” in the network-config.cfg file on the Unraid USB.