Comment 41 for bug 1573272

This bug was fixed in the package vlan - 1.9-3.2ubuntu3

---------------
vlan (1.9-3.2ubuntu3) artful; urgency=medium

  * In vlan ifupdown pre-up script, instead of calling ip link up for
    raw device before creating vlan interface, do a full ifup for raw
    device. Otherwise, if raw device processes ifup after vlan device,
    the raw device may be taken down and back up, which removes all vlan
    routes and other configuration. (LP: #1573272)

 -- Dan Streetman <email address hidden> Thu, 30 Mar 2017 09:16:10 -0400