January 30, 20251 yr Hey everyone, I just installed a new motherboard and CPU in my Unraid machine. It is an Asrock X470D4U (see details here). From that moment on, I had issues accessing the Unraid web interface. Going through the Unraid networking settings, I found an unknown networking device with an IP adress that does not stem from my network. See attached screenshot. All my network's IPs are in 192.168.136.0/24. Yet device eth0 shows an IP address starting with 169. This is outside my network's IP range and also outside the range of available DHCP adresses. I have no idea how it got set. Also, I know that the port my ethernet cable is actually plugged into belongs to eth1, since that port acquires a valid IP through DHCP. So I wonder where the IP adress on device eth0 comes from, and also, what that device actually is? What is its purpose? Is it, as I suspect, some sort of virtual address for internal communications? Since at various places in unraid, that IP is shown as "THE" IP of the server, I would like to correct this. Essentially I want either to treat eth1 as the "main" device or at least to consider the IP adress coming from eth1 to be "the correct address" for this device. Finally, I played around a little bit with the settings, since originally I didn't have access to Unraid at all - I seem to recall having to activate automatic IP assignment for eth1. But I probably screwed up some settings while doing this. So I wonder, what are the correct settings for eth0? Specifically, should I either bridge or bon this device to eth1, or neither of those? Regards
January 30, 20251 yr Community Expert Solution 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/
January 30, 20251 yr Author 14 hours ago, JorgeB said: 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/ Worked like a charm, thank you. Semi-relatedly, do you recommend having the ethernet device as bonding enabled and bridging enabled? What would the consequence be of either or both being disabled?
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