I have a 2nd NIC in a test Ubuntu 24.04.1 LTS machine (CloneZilla Server test) that doesn’t want to work.<\/p>\n
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I was able to assign a static IP to the 2nd NIC right after I installed Ubuntu, but a few days later (as of me typing this) it has suddenly stopped.<\/p>\n
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In the network settings it shows “Cable Unplugged” no matter what I’ve tried.<\/p>\n
ifconfig shows the interface is up but no traffic. I have activity lights on the NIC and on the switchport that I have it connected to.<\/p>\n
Any ideas or experience with this issue?<\/p>","upvoteCount":3,"answerCount":7,"datePublished":"2024-12-06T18:52:44.608Z","author":{"@type":"Person","name":"bcrooms","url":"https://community.spiceworks.com/u/bcrooms"},"suggestedAnswer":[{"@type":"Answer","text":"
I have a 2nd NIC in a test Ubuntu 24.04.1 LTS machine (CloneZilla Server test) that doesn’t want to work.<\/p>\n
I was able to assign a static IP to the 2nd NIC right after I installed Ubuntu, but a few days later (as of me typing this) it has suddenly stopped.<\/p>\n
In the network settings it shows “Cable Unplugged” no matter what I’ve tried.<\/p>\n
ifconfig shows the interface is up but no traffic. I have activity lights on the NIC and on the switchport that I have it connected to.<\/p>\n
Any ideas or experience with this issue?<\/p>","upvoteCount":3,"datePublished":"2024-12-06T18:52:44.680Z","url":"https://community.spiceworks.com/t/2nd-nic-in-ubuntu-suddenly-stopped-working/1150977/1","author":{"@type":"Person","name":"bcrooms","url":"https://community.spiceworks.com/u/bcrooms"}},{"@type":"Answer","text":"
What happens if you move the cable to a different switchport?<\/p>","upvoteCount":1,"datePublished":"2024-12-06T19:48:02.087Z","url":"https://community.spiceworks.com/t/2nd-nic-in-ubuntu-suddenly-stopped-working/1150977/2","author":{"@type":"Person","name":"mswope","url":"https://community.spiceworks.com/u/mswope"}},{"@type":"Answer","text":"
No changes, I’ve tried several ports on the switch.<\/p>\n
It initially worked right after first install of Ubuntu 24.04.1 and I set an IP on it, but something must have updated and now it doesn’t work within Ubuntu.<\/p>\n
I see status lights on the NIC card port and any switchport I connect to.<\/p>\n
I’ve tried several other cables as well, same result.<\/p>\n
I did come across some threads on other forums stating similar issues in newer Ubuntu releases 22 & 24 where ethernet adapters suddenly stop working.<\/p>","upvoteCount":1,"datePublished":"2024-12-06T20:11:28.876Z","url":"https://community.spiceworks.com/t/2nd-nic-in-ubuntu-suddenly-stopped-working/1150977/3","author":{"@type":"Person","name":"bcrooms","url":"https://community.spiceworks.com/u/bcrooms"}},{"@type":"Answer","text":"
physical or virtual? \nDHCP or static? \nSame subnet or different? \nAre they teamed in any way?<\/p>\n
If they are both on the same subnet and both connected to the same switch, could the switch have blocked one of the mac addresses (if STP is enabled) or if mac addresses are flapping on the switch, it may not expect more than one mac from the same source<\/p>","upvoteCount":1,"datePublished":"2024-12-06T21:05:09.615Z","url":"https://community.spiceworks.com/t/2nd-nic-in-ubuntu-suddenly-stopped-working/1150977/4","author":{"@type":"Person","name":"Rod-IT","url":"https://community.spiceworks.com/u/Rod-IT"}},{"@type":"Answer","text":"
