PVE becomes unreachable via ethernet but OS is running

AleXSR700

New Member
May 26, 2026
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Hi everyone,
I am new to PVE but have setup most things I wanted in my test PVE.

Unfortunately, the PVE itself and all VMs/LXCs become unreachable via ethernet from time to time and become immediately reachable again as soon as I log in on the actual server (currently still have a monitor connected).

So it seems the server is up an running but the ethernet connection is down somehow.

I googled and tried so far:
✅ EEE disabled
✅ Offloading disabled
✅ ASPM disabled
✅ Runtime PM disabled
✅ No suspend/hibernate
✅ No overload
✅ No obvious NIC resets

Before I wipe the server and start fresh, does anybody have any idea what might be causing this?

The behavior seems independent of which VM or LXC is running. Last time it was just ESPHome and OPNSense and ESPHome suddenly became unavailable in the middle of some testing.

Running latest PVE on Lenovo M70q with Intel I219-V. But as I said, I tried the above "usual suspects" according to the forum.

Thank you for your help
Alex