If this works under upstart, it's very likely that this is just another fallout from bug 1432821. Can you please re-try this with current vivid?
** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to vlan in Ubuntu. https://bugs.launchpad.net/bugs/1428368 Title: [systemd] ifdown can't stop more than one vlan/bond To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifenslave/+bug/1428368/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs