Share your craziest production Netplan configuration

Hello folks,

This is Tytus Kurek, a Product Manager for Ubuntu Server. We are looking for your feedback to improve Netplan. Could you please share your craziest production Netplan configuration ever? You can use https://pastebin.ubuntu.com/ and share the URL in the comments.

Thanks!

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Here is something that netplan could not do last time I looked into it. Bring up a network interface in promiscuous mode without any IP address information. The use case is an interface attached to a network switch SPAN port for network monitoring. I ended up writing a networkd-dispatcher script

See also: https://ubuntuforums.org/showthread.php?t=2390958

My 16.04 and 18.04 solutions
https://pastebin.ubuntu.com/p/XTTRq5MJpV/