diff --git a/utils/tracers/ndn-l3-rate-tracer.h b/utils/tracers/ndn-l3-rate-tracer.h
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+++ b/utils/tracers/ndn-l3-rate-tracer.h
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 UCLA
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author:  Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef CCNX_RATE_L3_TRACER_H
+#define CCNX_RATE_L3_TRACER_H
+
+#include "ndn-l3-tracer.h"
+
+#include "ns3/nstime.h"
+#include "ns3/event-id.h"
+
+#include <boost/tuple/tuple.hpp>
+#include <boost/shared_ptr.hpp>
+#include <map>
+#include <list>
+
+namespace ns3 {
+namespace ndn {
+
+/**
+ * @ingroup ccnx
+ * @brief CCNx network-layer rate tracer
+ */
+class L3RateTracer : public L3Tracer
+{
+public:
+  /**
+   * @brief Network layer tracer constructor
+   */
+  L3RateTracer (boost::shared_ptr<std::ostream> os, Ptr<Node> node);
+  L3RateTracer (boost::shared_ptr<std::ostream> os, const std::string &node);
+  virtual ~L3RateTracer ();
+
+  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
+  InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
+  
+  void
+  SetAveragingPeriod (const Time &period);
+  
+  virtual void
+  PrintHeader (std::ostream &os) const;
+
+  virtual void
+  Print (std::ostream &os) const;
+
+  virtual void
+  OutInterests  (std::string context,
+                 Ptr<const InterestHeader>, Ptr<const Face>);
+
+  virtual void
+  InInterests   (std::string context,
+                 Ptr<const InterestHeader>, Ptr<const Face>);
+
+  virtual void
+  DropInterests (std::string context,
+                 Ptr<const InterestHeader>, Ptr<const Face>);
+  
+  virtual void
+  OutNacks  (std::string context,
+             Ptr<const InterestHeader>, Ptr<const Face>);
+
+  virtual void
+  InNacks   (std::string context,
+             Ptr<const InterestHeader>, Ptr<const Face>);
+
+  virtual void
+  DropNacks (std::string context,
+             Ptr<const InterestHeader>, Ptr<const Face>);
+  
+  virtual void
+  OutData  (std::string context,
+            Ptr<const ContentObjectHeader>, Ptr<const Packet>, bool fromCache, Ptr<const Face>);
+
+  virtual void
+  InData   (std::string context,
+            Ptr<const ContentObjectHeader>, Ptr<const Packet>, Ptr<const Face>);
+
+  virtual void
+  DropData (std::string context,
+            Ptr<const ContentObjectHeader>, Ptr<const Packet>, Ptr<const Face>);
+
+private:
+  void
+  PeriodicPrinter ();
+  
+  void
+  Reset ();
+
+private:
+  boost::shared_ptr<std::ostream> m_os;
+  Time m_period;
+  EventId m_printEvent;
+
+  mutable std::map<Ptr<const Face>, boost::tuple<Stats, Stats, Stats, Stats> > m_stats;
+};
+
+} // namespace ndn
+} // namespace ns3
+
+#endif // CCNX_RATE_L3_TRACER_H