--- ip-down.d.dns.sh.old	2012-06-08 20:25:06.376690778 +0530
+++ ip-down.d.dns.sh.new	2012-06-08 20:32:49.284182992 +0530
@@ -1,3 +1,7 @@
 #!/bin/sh
 
-[ -e /etc/resolv.conf.backup.${IFNAME} ] && mv /etc/resolv.conf.backup.${IFNAME} /etc/resolv.conf
+if [ -x /usr/sbin/resolvconf ]; then
+  /usr/sbin/resolvconf -fd ${IFNAME}
+else
+  [ -e /etc/resolv.conf.backup.${IFNAME} ] && mv /etc/resolv.conf.backup.${IFNAME} /etc/resolv.conf
+fi