--- a/src/csma/examples/csma-ping.cc	Thu Aug 23 10:52:15 2012 -0700
+++ b/src/csma/examples/csma-ping.cc	Thu Aug 23 16:00:17 2012 -0700
@@ -83,9 +83,7 @@
   Config::SetDefault ("ns3::Ipv4RawSocketImpl::Protocol", StringValue ("2"));
   InetSocketAddress dst = InetSocketAddress (addresses.GetAddress (3));
   OnOffHelper onoff = OnOffHelper ("ns3::Ipv4RawSocketFactory", dst);
-  onoff.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
-  onoff.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
-  onoff.SetAttribute ("DataRate", DataRateValue (DataRate (15000)));
+  onoff.SetConstantRate (DataRate (15000));
   onoff.SetAttribute ("PacketSize", UintegerValue (1200));