diff -u vlan-1.9/debian/changelog vlan-1.9/debian/changelog
--- vlan-1.9/debian/changelog
+++ vlan-1.9/debian/changelog
@@ -1,3 +1,10 @@
+vlan (1.9-3ubuntu10.4) trusty; urgency=medium
+
+  * Don't trust ifup return code, as it returns 0 on failure; call ip link
+    set up after ifup to force vlan raw device up. (LP: #1573272)
+
+ -- Dan Streetman <dan.streetman@canonical.com>  Mon, 05 Jun 2017 12:12:01 -0400
+
 vlan (1.9-3ubuntu10.3) trusty; urgency=medium
 
   * Correct previous patch, to work for ifupdown configuration where a
diff -u vlan-1.9/debian/network/if-pre-up.d/vlan vlan-1.9/debian/network/if-pre-up.d/vlan
--- vlan-1.9/debian/network/if-pre-up.d/vlan
+++ vlan-1.9/debian/network/if-pre-up.d/vlan
@@ -60,9 +60,11 @@
         exit 1
     fi
     if [ ! -e "/sys/class/net/$IFACE" ]; then
-        # Try ifup for the raw device, if it fails then bring it up directly
-        # this is required e.g. there is no configuration for the raw device
-        ifup $IF_VLAN_RAW_DEVICE || ip link set up dev $IF_VLAN_RAW_DEVICE
+        # Try ifup for the raw device first; the return code can't be trusted
+        # on trusty because it returns 0 even on failure, so always bring it
+        # up directly also
+        ifup $IF_VLAN_RAW_DEVICE
+        ip link set up dev $IF_VLAN_RAW_DEVICE
         vconfig add $IF_VLAN_RAW_DEVICE $VLANID
     fi
 fi