--- ip-up.d.dns.sh.old	2012-06-08 20:25:19.766618237 +0530
+++ ip-up.d.dns.sh.new	2012-06-08 20:31:03.431423114 +0530
@@ -1,7 +1,11 @@
 #!/bin/sh
 
 if [ "$USEPEERDNS" = "1" -a -f /etc/ppp/resolv.conf ]; then
-  [ -e /etc/resolv.conf ] && mv /etc/resolv.conf /etc/resolv.conf.backup.${IFNAME}
-  mv /etc/ppp/resolv.conf /etc/resolv.conf
-  chmod 644 /etc/resolv.conf
+  if [ -x /usr/sbin/resolvconf ]; then
+    /usr/sbin/resolvconf -a ${IFNAME} </etc/ppp/resolv.conf
+  elif
+    [ -e /etc/resolv.conf ] && mv /etc/resolv.conf /etc/resolv.conf.backup.${IFNAME}
+    mv /etc/ppp/resolv.conf /etc/resolv.conf
+    chmod 644 /etc/resolv.conf
+  fi
 fi