Comment 19 for bug 1775131

Also observing this in 20.04.2 (kernel 5.4.0-70).
I will try swapping out physical transceivers on both ends of the link and a new switch port...

Of particular interest to me, netplan does not appear to re-run when this happens. I have a device renaming rule that matches on name, sets IP, and sets name. This device never comes back up unless I manually run netplan apply (which is always successful, but obvs. untenable). The root device (eno2) is not even listed in `ip link` output during the incident.

Please advise what logging/information I can provide to help track down culprit.