Nic keeps disconnecting and connecting for no apparent reason

Ask Fedora
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1

I’m a bit confused by this behavios in a pretty standard build intel nic

[Sat Apr 25 08:57:08 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Sat Apr 25 08:57:17 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[Sat Apr 25 08:57:21 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[Sat Apr 25 08:59:20 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Sat Apr 25 08:59:24 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[Sat Apr 25 08:59:26 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Sat Apr 25 08:59:29 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[Sat Apr 25 08:59:32 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Sat Apr 25 08:59:36 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[Sat Apr 25 09:01:40 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Sat Apr 25 09:01:50 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[Sat Apr 25 09:01:53 2026] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None

There is nothing special here. The drivers were installed during installation of F43:

Operating System: Fedora Linux 43
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.25.0
Qt Version: 6.10.3
Kernel Version: 6.19.13-200.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz
Memory: 16 GiB of RAM (15.5 GiB usable)
Graphics Processor: AMD Radeon RX Vega
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-V
2

It might be a bad cable or a bad ethernet port.
Try a new cable and use a different port on the switch/router.

Does that fix it?