I asked the question to shake out further details because things are not adding up here, as you'd agree!
What it points at is another upstream change in the kernel that has disabled networking (that trying other OS fails to detect ethernet reinforces this). How that could manifest in a system that was not upgraded makes no sense. That's why the responses here went around the circle of "switch zapped all the ethernet h/w on the boards" loop.
Are you certain there was no kernel upgrade (degrade)?
Need to look in to reports upstream of this error.
What it points at is another upstream change in the kernel that has disabled networking (that trying other OS fails to detect ethernet reinforces this). How that could manifest in a system that was not upgraded makes no sense. That's why the responses here went around the circle of "switch zapped all the ethernet h/w on the boards" loop.
Are you certain there was no kernel upgrade (degrade)?
Need to look in to reports upstream of this error.