This system has been running without problems for over two years, but since version 7.2.3, a worrying message has appeared about five times:

Jan 1 22:54:54 Raider kernel: r8125: eth0: link down

Jan 1 22:54:54 Raider kernel: br0: port 1(eth0) entered disabled state

Jan 1 22:54:57 Raider kernel: r8125: eth0: link up

Jan 1 22:54:57 Raider kernel: br0: port 1(eth0) entered blocking state

Jan 1 22:54:57 Raider kernel: br0: port 1(eth0) entered forwarding state

It appears that the eth:0 LAN port disappeared for about 3 seconds.

I thought it was due to the cable or port on the switch, but even replacing the cable didn't help.

The strange thing is that this message has appeared about 5 times since the 7.2.3 update, with several days in between. It seems to be a very rare occurrence.

However, it never happened before 7.2.3.

It's so rare that it will probably be extremely difficult to find the cause.

If you have any ideas, please let me know.

BR

raider-diagnostics-20260102-1438.zip

That's typically a NIC, cable, or switch issue.

When you say it started with 7.2.3, did you run previous 7.2 releases? In any case, I recommend downgrading and retesting to confirm; the problem may only have started after the upgrade.