Netplan optional interfaces

[Danial]

Hello,
I have two interface eth0 and eth1, on my system. None of them are essential for the operation of the system. When I set the netplan property "optional: true" for both interfaces, the network still waits during boot time for the network to become available even when one interface is active during boot time. When I set only one interface to "optional: true," the boot time has no waiting time if the interface is active during the boot. I think the expected behaviour should be that the networkd doesn't wait for any optional interface.

[Danilo Egea Gondolfo (danilogondolfo)]

Hello,

can you provide more information about your system? What versions of Ubuntu and netplan.io are your running?

I believe it might be related to this issue https://bugs.launchpad.net/netplan/+bug/2060311

It's how systemd-networkd-wait-online behaves when all the interfaces have RequiredForOnline=no unfortunately.

We are looking for a fix for this issue.

[Danial (danchitnis)]

Yes, most likely related. I am using Noble Nombat dev (image downloaded April 8, 2024), and networkd as the backend. The Netplan was included by default.