--- /sbin/ifdown.orig	2011-03-15 23:52:20 +0100
+++ /sbin/ifdown	2011-03-16 00:53:38 +0100
@@ -3,6 +3,7 @@
 
 cd /etc/sysconfig/network-scripts
 . network-functions
+. /etc/sysconfig/network
 
 CONFIG=$1
 
@@ -62,4 +63,14 @@
     # the interface went down.
 fi
 
+if [ -n "$VLAN" -a -x /usr/sbin/vconfig ]; then
+    # 802.1q VLAN
+    if echo ${DEVICE} | LANG=C egrep -v '(:)' | LANG=C egrep -q '(eth|bond)[0-9][0-9]*\.[0-9][0-9]?[0-9]?[0-9]?' \
+        || echo ${DEVICE} | LANG=C egrep -q 'vlan[0-9][0-9]?[0-9]?[0-9]?' ; then
+        [ -f /proc/net/vlan/${DEVICE} ] && {
+            /usr/sbin/vconfig rem ${DEVICE}
+        }
+    fi
+fi
+
 exit $retcode