Wild guess: this might be because you have only one network interface that is set to use DHCP but the DHCP server is set not to return any routers. See https://github.com/systemd/systemd/issues/3752 for this type of scenario.
** Bug watch added: github.com/systemd/systemd/issues #3752 https://github.com/systemd/systemd/issues/3752 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1713984 Title: started raise network interfaces - times out To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1713984/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
