diff -r 2ef4be6c501a src/internet-stack/ipv6-interface.cc
--- a/src/internet-stack/ipv6-interface.cc	Fri Nov 13 16:45:28 2009 +0100
+++ b/src/internet-stack/ipv6-interface.cc	Wed Dec 02 08:14:55 2009 +0100
@@ -75,11 +75,6 @@
   {
     return;
   }
-
-  if (!m_device->NeedsArp ())
-  {
-    return;
-  }
   
   /* set up link-local address */
   if (!DynamicCast<LoopbackNetDevice> (m_device)) /* no autoconf for ip6-localhost */
@@ -97,8 +92,11 @@
     }
   }
 
-  Ptr<Icmpv6L4Protocol> icmpv6 = m_node->GetObject<Ipv6L3Protocol> ()->GetIcmpv6 ();
-  m_ndCache = icmpv6->CreateCache (m_device, this);
+  if (m_device->NeedsArp ())
+  {
+  	Ptr<Icmpv6L4Protocol> icmpv6 = m_node->GetObject<Ipv6L3Protocol> ()->GetIcmpv6 ();
+  	m_ndCache = icmpv6->CreateCache (m_device, this);
+  }
 }
 
 void Ipv6Interface::SetNode (Ptr<Node> node)