diff --git a/server/packetsequence.h b/server/packetsequence.h
index 402faca..903fc1e 100644
--- a/server/packetsequence.h
+++ b/server/packetsequence.h
@@ -27,7 +27,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 class PacketSequence
 {
 public:
-    PacketSequence() {
+    PacketSequence(bool trackGuidStats) {
+        trackGuidStats_ = trackGuidStats;
         sendQueue_ = pcap_sendqueue_alloc(1*1024*1024);
         lastPacket_ = NULL;
         packets_ = 0;
@@ -61,7 +62,7 @@ public:
         lastPacket_ = (struct pcap_pkthdr *)
                             (sendQueue_->buffer + sendQueue_->len);
         ret = pcap_sendqueue_queue(sendQueue_, pktHeader, pktData);
-        if (ret >= 0) {
+        if (trackGuidStats_ && (ret >= 0)) {
             uint guid;
             if (SignProtocol::packetGuid(pktData, pktHeader->caplen, &guid)) {
                 streamStatsMeta_[guid].tx_pkts++;
@@ -79,6 +80,9 @@ public:
     int repeatSize_;
     long usecDelay_;
     StreamStats streamStatsMeta_;
+
+private:
+    bool trackGuidStats_;
 };
 
 #endif
diff --git a/server/pcapport.cpp b/server/pcapport.cpp
index fc6aa13..7f2e398 100644
--- a/server/pcapport.cpp
+++ b/server/pcapport.cpp
@@ -132,12 +132,32 @@ bool PcapPort::setRateAccuracy(AbstractPort::Accuracy accuracy)
 
 bool PcapPort::startStreamStatsTracking()
 {
-    return rxStatsPoller_->start();
+    if (!transmitter_->setStreamStatsTracking(true))
+        goto _tx_fail;
+    if (!rxStatsPoller_->start())
+        goto _rx_fail;
+    return true;
+
+_rx_fail:
+    transmitter_->setStreamStatsTracking(false);
+_tx_fail:
+    qWarning("failed to start stream stats tracking");
+    return false;
 }
 
 bool PcapPort::stopStreamStatsTracking()
 {
-    return rxStatsPoller_->stop();
+    if (!transmitter_->setStreamStatsTracking(false))
+        goto _tx_fail;
+    if (!rxStatsPoller_->stop())
+        goto _rx_fail;
+    return true;
+
+_rx_fail:
+    transmitter_->setStreamStatsTracking(true);
+_tx_fail:
+    qWarning("failed to stop stream stats tracking");
+    return false;
 }
 
 void PcapPort::startDeviceEmulation()
diff --git a/server/pcaptransmitter.cpp b/server/pcaptransmitter.cpp
index d7eae96..e6a2c89 100644
--- a/server/pcaptransmitter.cpp
+++ b/server/pcaptransmitter.cpp
@@ -43,6 +43,11 @@ bool PcapTransmitter::setRateAccuracy(
     return txThread_.setRateAccuracy(accuracy);
 }
 
+bool PcapTransmitter::setStreamStatsTracking(bool enable)
+{
+    return txThread_.setStreamStatsTracking(enable);
+}
+
 void PcapTransmitter::clearPacketList()
 {
     txThread_.clearPacketList();
diff --git a/server/pcaptransmitter.h b/server/pcaptransmitter.h
index 75964bc..a232194 100644
--- a/server/pcaptransmitter.h
+++ b/server/pcaptransmitter.h
@@ -33,6 +33,7 @@ public:
     ~PcapTransmitter();
 
     bool setRateAccuracy(AbstractPort::Accuracy accuracy);
+    bool setStreamStatsTracking(bool enable);
 
     void clearPacketList();
     void loopNextPacketSet(qint64 size, qint64 repeats,
diff --git a/server/pcaptxthread.cpp b/server/pcaptxthread.cpp
index 1bd5d97..8e18a58 100644
--- a/server/pcaptxthread.cpp
+++ b/server/pcaptxthread.cpp
@@ -39,6 +39,7 @@ PcapTxThread::PcapTxThread(const char *device)
 #endif
     state_ = kNotStarted;
     stop_ = false;
+    trackStreamStats_ = false;
     clearPacketList();
     handle_ = pcap_open_live(device, 64 /* FIXME */, 0, 1000 /* ms */, errbuf);
 
@@ -82,6 +83,12 @@ bool PcapTxThread::setRateAccuracy(
     return true;
 }
 
+bool PcapTxThread::setStreamStatsTracking(bool enable)
+{
+    trackStreamStats_ = enable;
+    return true;
+}
+
 void PcapTxThread::clearPacketList()
 {
     Q_ASSERT(!isRunning());
@@ -103,7 +110,7 @@ void PcapTxThread::clearPacketList()
 void PcapTxThread::loopNextPacketSet(qint64 size, qint64 repeats,
         long repeatDelaySec, long repeatDelayNsec)
 {
-    currentPacketSequence_ = new PacketSequence;
+    currentPacketSequence_ = new PacketSequence(trackStreamStats_);
     currentPacketSequence_->repeatCount_ = repeats;
     currentPacketSequence_->usecDelay_ = repeatDelaySec * long(1e6)
                                             + repeatDelayNsec/1000;
@@ -141,7 +148,7 @@ bool PcapTxThread::appendToPacketList(long sec, long nsec,
         }
 
         //! \todo (LOW): calculate sendqueue size
-        currentPacketSequence_ = new PacketSequence;
+        currentPacketSequence_ = new PacketSequence(trackStreamStats_);
 
         packetSequenceList_.append(currentPacketSequence_);
 
@@ -342,7 +349,8 @@ _restart:
     }
 
 _exit:
-    updateStreamStats();
+    if (trackStreamStats_)
+        updateStreamStats();
 
     state_ = kFinished;
 }
diff --git a/server/pcaptxthread.h b/server/pcaptxthread.h
index 29ea0fa..5b94ccb 100644
--- a/server/pcaptxthread.h
+++ b/server/pcaptxthread.h
@@ -34,6 +34,7 @@ public:
     ~PcapTxThread();
 
     bool setRateAccuracy(AbstractPort::Accuracy accuracy);
+    bool setStreamStatsTracking(bool enable);
 
     void clearPacketList();
     void loopNextPacketSet(qint64 size, qint64 repeats,
@@ -87,6 +88,7 @@ private:
     volatile bool stop_;
     volatile State state_;
 
+    bool trackStreamStats_;
     StatsTuple *stats_;
     StatsTuple lastStats_;
     StreamStats streamStats_;