On Thu, 17 Jan 2019 18:32:48 +0000, Henry Law <
ne...@lawshouse.org>
wrote:
>I have a Linux server (actually a Dell PC mini-tower) with three network
>connections: one via the onboard socket and the other two via PCIe cards.
>
>On one of the cards there is no network connectivity and "networkctl"
>says "no-carrier". But there are green lights on the NIC and on the
>switch port at the other end (yes I tried a different cable).
>
>I thought a green light meant there was a carrier, i.e. that level 0 was
>operating. I must be wrong, but what do the lights mean in that case?
That's what they're supposed to mean, and usually do.
I had an Intel X540 fail on me recently that presented the same as
yours, lights up but no traffic on either port. Firmware would still try
and PXEboot, the card was recognised and driver loaded by the OS, no
carrier. Everything was working except the actual networking. Same
behaviour under CentOS and FreeBSD. Firmware update made no change.
Toss into the recyclers and pick up a new one.
Cheers - Jaimie
--
"I'd tried caffeine a few times; it made me believe I was focused and
energetic, but it turned my judgment to shit. Widespread use of
caffeine explains a lot about the twentieth century."
- "Distress", Greg Egan