Public bug reported: Issue 1 technical: 18.04.1, did not check others. Installing ifupdown 2 ( to expand vlan interfaces from template loop ) removes ifupdown. and does not config interfaces at boot.
Also online manual page seems to suggest ifupdown2 with py-mako installed as default one. https://manpages.ubuntu.com/manpages/bionic/man5/interfaces.5.html It is quite easy to repeat - just add a single no-function VLAN (iface eno1.999 inet manual) to any network adapter, observe it added via ifupdown, install ifupdown2 (the other is removed down the road) , reboot as much as you want, nothing at boot. ** Affects: ifupdown2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1814868 Title: ifupdown2 replaces (conflicts) with ifupdown but offers no startup config To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown2/+bug/1814868/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
