diff -r eb7335c2423c src/aodv/model/aodv-routing-protocol.cc
--- a/src/aodv/model/aodv-routing-protocol.cc	Sun Apr 14 21:23:56 2013 -0700
+++ b/src/aodv/model/aodv-routing-protocol.cc	Fri Apr 19 07:11:08 2013 -0700
@@ -135,7 +135,7 @@
   MaxQueueTime (Seconds (30)),
   DestinationOnly (false),
   GratuitousReply (true),
-  EnableHello (true),
+  EnableHello (false),
   m_routingTable (DeletePeriod),
   m_queue (MaxQueueLen, MaxQueueTime),
   m_requestId (0),
@@ -149,10 +149,6 @@
   m_rreqRateLimitTimer (Timer::CANCEL_ON_DESTROY),
   m_rerrRateLimitTimer (Timer::CANCEL_ON_DESTROY)
 {
-  if (EnableHello)
-    {
-      m_nb.SetCallback (MakeCallback (&RoutingProtocol::SendRerrWhenBreaksLinkToNextHop, this));
-    }
 }
 
 TypeId
@@ -246,7 +242,7 @@
                                         &RoutingProtocol::GetDesinationOnlyFlag),
                    MakeBooleanChecker ())
     .AddAttribute ("EnableHello", "Indicates whether a hello messages enable.",
-                   BooleanValue (true),
+                   BooleanValue (false),
                    MakeBooleanAccessor (&RoutingProtocol::SetHelloEnable,
                                         &RoutingProtocol::GetHelloEnable),
                    MakeBooleanChecker ())
@@ -315,6 +311,7 @@
   NS_LOG_FUNCTION (this);
   if (EnableHello)
     {
+      m_nb.SetCallback (MakeCallback (&RoutingProtocol::SendRerrWhenBreaksLinkToNextHop, this));
       m_nb.ScheduleTimer ();
     }
   m_rreqRateLimitTimer.SetFunction (&RoutingProtocol::RreqRateLimitTimerExpire,