diff --git a/utils/tracers/ndn-l3-aggregate-tracer.h b/utils/tracers/ndn-l3-aggregate-tracer.h
new file mode 100644
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+++ b/utils/tracers/ndn-l3-aggregate-tracer.h
@@ -0,0 +1,99 @@
+/* -*- 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 NDN_L3_AGGREGATE_TRACER_H
+#define NDN_L3_AGGREGATE_TRACER_H
+
+#include "ndn-l3-tracer.h"
+
+#include <ns3/nstime.h>
+#include <ns3/event-id.h>
+
+namespace ns3 {
+namespace ndn {
+
+class L3AggregateTracer : public L3Tracer
+{
+public:
+  L3AggregateTracer (Ptr<Node> node);
+  L3AggregateTracer (const std::string &node);
+  virtual ~L3AggregateTracer ();
+  
+  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>);
+
+protected:
+  void
+  Reset ();
+
+  void
+  PeriodicPrinter ();
+  
+protected:
+  Stats m_packets;
+  Stats m_bytes;
+
+  Time m_period;
+  EventId m_printEvent;
+};
+
+} // namespace ndn
+} // namespace ns3
+
+#endif // NDN_L3_AGGREGATE_TRACER_H