Proxmox 6 - network won't start

do a " systemctl mask ifupdown-pre.service" not avoid launching udev-settle.

udev-settle boot try to start anyway
 
How can we diagnose what is causing the udevadm settle to fail? I'm on this boat too now, unfortunately.
 
How can we diagnose what is causing the udevadm settle to fail? I'm on this boat too now, unfortunately.
It's because it's waiting for initalization of a device hardware on your server. (could be any hardware, harddisk or other controller).

maybe a #dmesg after boot could show what is slow to start.
 
It was caused by an iODD external drive used to install the initial system and run some updates to the BIOS. 100% unrelated to Proxmox and Debian but at the same time, udevadm settle should time out gracefully. It's too obscure right now to figure out unless you trace the systemd process.