diff -u vlan-1.9/debian/changelog vlan-1.9/debian/changelog
--- vlan-1.9/debian/changelog
+++ vlan-1.9/debian/changelog
@@ -1,3 +1,13 @@
+vlan (1.9-3.2ubuntu1.16.04.2) xenial; 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 <dan.streetman@canonical.com>  Thu, 30 Mar 2017 09:16:10 -0400
+
 vlan (1.9-3.2ubuntu1.16.04.1) xenial; urgency=medium
 
   * If VLAN is configured with higher MTU than raw device MTU, which can
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
@@ -60,7 +60,7 @@
         exit 1
     fi
     if [ ! -e "/sys/class/net/$IFACE" ]; then
-        ip link set up dev $IF_VLAN_RAW_DEVICE
+        ifup $IF_VLAN_RAW_DEVICE
         vconfig add $IF_VLAN_RAW_DEVICE $VLANID
     fi
 fi