--- bin/dhcpd.pl	2009/07/29 12:23:25	32
+++ bin/dhcpd.pl	2009/07/29 12:23:47	33
@@ -69,8 +69,11 @@
 	}
 
 	write_file "$conf/mac/$mac", $ip;
-	unlink     "$conf/ip/$ip" if -e "$conf/ip/$ip";
-	symlink    "$conf/mac/$mac", "$conf/ip/$ip";
+	if ( -l "$conf/ip/$ip" && readlink "$conf/ip/$ip" ne "$conf/mac/$mac") {
+		unlink     "$conf/ip/$ip";
+		symlink    "$conf/mac/$mac", "$conf/ip/$ip";
+		warn "$mac IP changed to $ip";
+	}
 
 	print "$mac NEW $ip\n";