[Bug 1775131] Re: Ubuntu 18.04 networking issue (connection drops after approx. 15 minutes)

Not sure if this will overlap with anyone else, but my experience was a combination of 2 things: 1. Reboots were happening, caused by unattended-upgrade 2. The device causing trouble was a renamed device. Turns out it was trying to get renamed twice: Once very early in boot from eth1 to eno2,

[Bug 1770082] Re: systemd-networkd not renaming devices on boot

Clarifying what worked for me across all the servers where I need this config: cat

[Bug 1770082] Re: systemd-networkd not renaming devices on boot

Is it possible this regressed sometime between Bionic and Focal? I am observing this in 20.04. Early in dmesg I see my interface renamed from eth1 to eno2, then my netplan attempts to rename with a match (on name=eno2) to my desired name ("ceph" in this case). I see syslog message:

[Bug 1775131] Re: Ubuntu 18.04 networking issue (connection drops after approx. 15 minutes)

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