Allegedly, on or about 26 October 2015, Kseniya Blashchuk sent:
I noticed in dmesg that my ethernet link is flapping all the time
..
I changed the cabling, tried to plug into another switch no difference.
Any ideas will be very appreciated as this flapping brings a lot of inconvenience.
I would strongly suspect the network card is broken. Flapping is a
common effect seen in busted network cards. I've even heard it said
that it's a deliberately designed failure indicator.
They do get busted easily enough, especially if you connect equipment
between different rooms, or buildings. There can be quite a voltage
difference between the mains wiring, many cards don't have adequate
galvanic isolation, or none at all. And long wiring can pick up EMI
from lightning storms.
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[tim@localhost ~]$ uname -rsvp
Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64
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