diff -Nru dhcp-4.1.0.orig/client/scripts/linux dhcp-4.1.0/client/scripts/linux
--- dhcp-4.1.0.orig/client/scripts/linux	2009-01-17 15:15:09.000000000 +0100
+++ dhcp-4.1.0/client/scripts/linux	2009-01-17 15:16:15.000000000 +0100
@@ -211,7 +211,7 @@
   ifconfig $interface inet $new_ip_address $new_subnet_arg \
 					$new_broadcast_arg
   set $new_routers
-  if ping -q -c 1 $1; then
+  if ping -q -c 1 -I $interface $1; then
     if [ x$new_ip_address != x$alias_ip_address ] && \
 			[ x$alias_ip_address != x ]; then
       ifconfig $interface:0 inet $alias_ip_address $alias_subnet_arg