New 2.5GbE NIC (QNAP) and network settings - eth0 is down and on-board NIC is not recognised anymore - solved partially

Hi,

I have an Unraid server (new build) and it has an Asus H370M Plus mainboard.

That mainboard has a built in NIC and I can use that just fine.

I want to add a 2.5 GbE NIC, it is a recommended QNAP card (QNAP QXG-2G1T-I225 Single Port 2.5GbE 4-Speed Network Card) and the system seems to recognise it.

When I boot up though, the onboard NIC (eth1 now) is not recognised and the new NIC (eth0) gets an IP like this: 169.254.36.152.

Since my network uses the 192.168.... and so on range, I had to boot into the WebGUI to change settings.

But it is set to Dynamic and it does not find the DNS server. (192.168.x.1)

When I set it to static and set the IP to 192.168.x.87 and set the DNS and gateway to 192.168.x.1, the WebGUI says in those red letters "eth0 is down. check cable".

Ah, I also have a QNAP 2.5GbE switch, but it is an unmanaged switch, thus it should not have the power to set IP. I also have a M1 Mac mini with a 2.5GbE to USB-C adapter and that adapter is connected to that same switch, and macOS tells me, the IP is in my usual range. And it even worked with another server, even though at 1Gb speeds.

And the onboard NIC uses another switch of course, a 1GbE one.

My search power has left me a bit, thus I don't know anymore what to look for.

Again, I am a bit lost, since this server build was extremely fracked up. I built two Unraid servers in 2018 or so and they worked okay, minor hiccups and such, but all in all okay.

But this build is going on my nerves. For example, the new server was running okay on a table for several days, to transfer some files, but once I wanted to put it into a new case (Fractal Define 7 XL), it did not POWER ON anymore, even though the board had power (LEDs were on). Ten or so disassembles later it might turn out, that the frelling motherboard standoffs prevented some grounding or whatever. I exchanged them and now the server is booting. What fun.

UPDATE 1

I connected the 2.5GbE switch with another cable to one of the 1GbE switches and the eth0 is down message went away.

Then I set the IP to Dynamic and Unraid did its wavy thing until I clicked somewhere else - a minute or so after clicking APPLY.

That worked. But the eth1 interface is still shutdown (inactive), which was the former eth0 interface. Onwards I go.

Edited May 12, 20224 yr by WhiteTowerBlackNode