diff --git a/model/fw/ndn-forwarding-strategy.cc b/model/fw/ndn-forwarding-strategy.cc
index 5b51993..6bfee78 100644
--- a/model/fw/ndn-forwarding-strategy.cc
+++ b/model/fw/ndn-forwarding-strategy.cc
@@ -79,6 +79,12 @@
     .AddTraceSource ("InData",   "InData",   MakeTraceSourceAccessor (&ForwardingStrategy::m_inData))
     .AddTraceSource ("DropData", "DropData", MakeTraceSourceAccessor (&ForwardingStrategy::m_dropData))
 
+    ////////////////////////////////////////////////////////////////////
+    ////////////////////////////////////////////////////////////////////
+
+    .AddTraceSource ("SatisfiedInterests",  "SatisfiedInterests",  MakeTraceSourceAccessor (&ForwardingStrategy::m_satisfiedInterests))
+    .AddTraceSource ("TimedOutInterests",   "TimedOutInterests",   MakeTraceSourceAccessor (&ForwardingStrategy::m_timedOutInterests))
+    
     .AddAttribute ("CacheUnsolicitedData", "Cache overheard data that have not been requested",
                    BooleanValue (false),
                    MakeBooleanAccessor (&ForwardingStrategy::m_cacheUnsolicitedData),
@@ -441,6 +447,8 @@
     {
       pitEntry->GetFibEntry ()->UpdateFaceRtt (inFace, Simulator::Now () - out->m_sendTime);
     }
+
+  m_satisfiedInterests (pitEntry);
 }
 
 bool
@@ -600,7 +608,7 @@
 void
 ForwardingStrategy::WillEraseTimedOutPendingInterest (Ptr<pit::Entry> pitEntry)
 {
-  // do nothing for now. may be need to do some logging
+  m_timedOutInterests (pitEntry);
 }
 
 void
diff --git a/model/fw/ndn-forwarding-strategy.h b/model/fw/ndn-forwarding-strategy.h
index b87b07d..a3fe5b5 100644
--- a/model/fw/ndn-forwarding-strategy.h
+++ b/model/fw/ndn-forwarding-strategy.h
@@ -501,6 +501,13 @@
 
   TracedCallback<Ptr<const ContentObject>, Ptr<const Packet>,
                   Ptr<const Face> > m_dropData;  ///< @brief trace of dropped Data
+
+  ////////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////
+
+  TracedCallback< Ptr<const pit::Entry> > m_satisfiedInterests;
+  TracedCallback< Ptr<const pit::Entry> > m_timedOutInterests;
 };
 
 } // namespace ndn