October 27, 20241 yr I'm experiencing issues with my Unraid server not connecting properly to the LAN after a hardware migration. The server's network interface (eth0) frequently shows "Link detected: no" and "Link detected: yes" in the logs, indicating an unstable connection. The server is not showing up at all on my router, and I can't access the internet through the Unraid GUI locally. Troubleshooting Steps Taken So Far: Checked Physical Connections and verified that the ethernet cable is properly connected to both the Unraid server and the switch/router. Plugging into a different device works fine. Manual Configuration of Speed and Duplex I manually set the network speed and duplex settings using the command: ethtool -s eth0 speed 1000 duplex full autoneg on This did not resolve the issue, so I reverted to the default auto-negotiation settings with: ethtool -s eth0 autoneg on Verified Network Driver Information: I ran ethtool eth0 and confirmed that the driver in use is e1000e, and the connection shows "Link detected: no" during the problem. Checked the Syslog for Errors: The syslog shows repeated instances of "NIC Link is Up" followed shortly by "NIC Link is Down" for eth0. The network bridge (br0) state changes frequently from "forwarding" to "disabled" in response to these link events. Tried Restarting Network Services: System Information: Unraid Version: 6.12.5 Network Card: Onboard NIC Motherboard: ASUS PRIME Z390-A with BIOS version 2101 I'm looking for advice on what could be causing this network instability and any additional troubleshooting steps I could try. Could this be a hardware issue with the NIC, or are there software/driver configurations that I should adjust? Any insights would be greatly appreciated. Thanks so much!! ***The diagnostics file is dated 2017 because I had to replace the CMOS battery and haven't been able to connect to the internet to update the time settings. *** adamserver-diagnostics-20170101-1144.zip Edited October 27, 20241 yr by lukewarmtauntaun changed network card info and unraid version
October 27, 20241 yr Community Expert Diagnostics is saying that no link is detected to your NIC. I would suggest checking that the RJ-45 are fully seated. Look at the lights on both ports and verify what their color and pattern is indicating. (You will have to read the manuals to determine this.) Then that doesn't help, replace the Cat5 cable between the server and the switch.
October 27, 20241 yr Author Thanks for the reply. The cables were the first thing I double checked. Even tried a different one, at both the server and switch. The lights on the port only flash together once every 30-60s or so. Yellow and amber in color, which I think indicates 10/100 speed. Could it be a driver issue or should I just scrap the onboard NIC and order a card?
October 27, 20241 yr Community Expert It sure sounds like a cable or connection. 3 hours ago, lukewarmtauntaun said: Plugging into a different device works fine. What worked fine? Did plugging into a different switch establish a connection? If me, I would be putting new ends in the cable and a different port on the router/sw.
October 27, 20241 yr Author 3 minutes ago, Veah said: It sure sounds like a cable or connection. What worked fine? Did plugging into a different switch establish a connection? If me, I would be putting new ends in the cable and a different port on the router/sw. I mean, if I take the same ethernet cable and plug it into my non-unraid PC, I get a solid connection. I've also tried a couple different cables, so I don't think it's a cable or connection issue. Nothing has changed there. The motherboard is new (used), so I'm thinking that it might be that the onboard NIC on this motherboard has gone kaput. Just trying to see if there are any other troubleshooting ideas before I buy a PCI card.
October 27, 20241 yr Community Expert It's possible your MB nic is bad. Are there any bios nic settings you can poke around with?
October 27, 20241 yr Author 7 minutes ago, Veah said: It's possible your MB nic is bad. Are there any bios nic settings you can poke around with? Yeah, made sure the onboard NIC was enabled and disabled ASPM in case there was some weird low power setting messing with things. No dice. Appreciate the help!
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