--- a/examples/wireless/multirate.cc	Thu May 12 21:19:07 2011 -0700
+++ b/examples/wireless/multirate.cc	Thu May 12 21:49:50 2011 -0700
@@ -383,7 +383,7 @@
 
   if (enableRouting)
     {
-      internet.SetRoutingHelper(list);
+      internet.SetRoutingHelper(list);  // has effect on the next Install ()
     }
   internet.Install (c);