ifup is iterating over all vlan sub vlan interfaces for ens interfaces

[Immo]

I expect that a single ifup call with just one vlan interface will NOT bring up all sub vlan interfaces too
but on my ubuntu 18.04.02 I do see this

root@dsr-router-1:~# ifup ens19.2023
ens19.2023
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
ens19.2023.4
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 4 to IF -:ens19.2023:-
ens19.2023.4090
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 4090 to IF -:ens19.2023:-
root@dsr-router-1:~#

more is written at> https://askubuntu.com/questions/1305801

[Immo (iwetzel)]

I just added an echo to the /etc/network/if-pre-up.d/vlan to see the processed vlanIF
Therefore you see IF.VLAN.SUBVLAN .....

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1910584/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]