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
@@ -16,11 +16,15 @@
     VLANID=`echo $IFACE|sed "s/vlan0*//"`
   ;;
   eth*.0*|bond*.0*|wlan*.0*)
+    # Silently ignore interfaces which ifupdown handles on its own
+    [ -z "$IF_VLAN_RAW_DEVICE" ] && exit 0
     vconfig set_name_type DEV_PLUS_VID
     VLANID=`echo $IFACE|sed "s/eth[0-9][0-9]*\.0*//g;s/bond[0-9][0-9]*\.0*//;s/wlan[0-9][0-9]*\.0*//"`
     IF_VLAN_RAW_DEVICE=`echo $IFACE|sed "s/\(eth[0-9][0-9]*\)\..*/\1/;s/\(bond[0-9][0-9]*\)\..*/\1/;s/\(wlan[0-9][0-9]*\)\..*/\1/"`
   ;;
   eth*.*|bond*.*|wlan*.*)
+    # Silently ignore interfaces which ifupdown handles on its own
+    [ -z "$IF_VLAN_RAW_DEVICE" ] && exit 0
     vconfig set_name_type DEV_PLUS_VID_NO_PAD
     VLANID=`echo $IFACE|sed "s/eth[0-9][0-9]*\.0*//g;s/bond[0-9][0-9]*\.0*//g;s/wlan[0-9][0-9]*\.0*//g"`
     IF_VLAN_RAW_DEVICE=`echo $IFACE|sed "s/\(eth[0-9][0-9]*\)\..*/\1/;s/\(bond[0-9][0-9]*\)\..*/\1/;s/\(wlan[0-9][0-9]*\)\..*/\1/"`
@@ -51,8 +55,10 @@
         echo "$IF_VLAN_RAW_DEVICE does not exist, unable to create $IFACE"
         exit 1
     fi
-    ip link set up dev $IF_VLAN_RAW_DEVICE
-    vconfig add $IF_VLAN_RAW_DEVICE $VLANID
+    if [ ! -e "/sys/class/net/$IFACE" ]; then
+        ip link set up dev $IF_VLAN_RAW_DEVICE
+        vconfig add $IF_VLAN_RAW_DEVICE $VLANID
+    fi
 fi
 
 # This is not vlan specific, and should actually go somewhere else.
diff -u vlan-1.9/debian/network/if-post-down.d/vlan vlan-1.9/debian/network/if-post-down.d/vlan
--- vlan-1.9/debian/network/if-post-down.d/vlan
+++ vlan-1.9/debian/network/if-post-down.d/vlan
@@ -10,9 +10,13 @@
     exit 0
   ;;
   eth*.0*|bond*.0*|wlan*.0*)
+    # Silently ignore interfaces which ifupdown handles on its own
+    [ -z "$IF_VLAN_RAW_DEVICE" ] && exit 0
     IF_VLAN_RAW_DEVICE=`echo $IFACE|sed "s/\(eth[0-9][0-9]*\)\..*/\1/;s/\(bond[0-9][0-9]*\)\..*/\1/;s/\(wlan[0-9][0-9]*\)\..*/\1/"`
   ;;
   eth*.*|bond*.*|wlan*.*)
+    # Silently ignore interfaces which ifupdown handles on its own
+    [ -z "$IF_VLAN_RAW_DEVICE" ] && exit 0
     IF_VLAN_RAW_DEVICE=`echo $IFACE|sed "s/\(eth[0-9][0-9]*\)\..*/\1/;s/\(bond[0-9][0-9]*\)\..*/\1/;s/\(wlan[0-9][0-9]*\)\..*/\1/"`
   ;;
   # Test for vlan raw device (#196890, #292648)