diff --git a/tools/ft-analyzer/ftanalyzer/common/fast_analyzer_wrapper.py b/tools/ft-analyzer/ftanalyzer/common/fast_analyzer_wrapper.py
index 39320a55..ea17eafb 100644
--- a/tools/ft-analyzer/ftanalyzer/common/fast_analyzer_wrapper.py
+++ b/tools/ft-analyzer/ftanalyzer/common/fast_analyzer_wrapper.py
@@ -36,8 +36,7 @@
 )
 from ftanalyzer.reports.statistical_report import StatisticalReport
 
-SITE_PACKAGES_PREFIX = sysconfig.get_path("stdlib")
-GLOBAL_IMPORT_DIR = f"{SITE_PACKAGES_PREFIX}/site-packages/flowtest"
+GLOBAL_IMPORT_DIR = os.path.join(sysconfig.get_path("platlib"), "flowtest")
 
 
 def fast_analyzer_available() -> bool:
diff --git a/tools/ft-fast-analyzer/src/statisticalmodel.h b/tools/ft-fast-analyzer/src/statisticalmodel.h
index 386d17bf..e8899858 100644
--- a/tools/ft-fast-analyzer/src/statisticalmodel.h
+++ b/tools/ft-fast-analyzer/src/statisticalmodel.h
@@ -80,7 +80,7 @@ struct SMSubnetSegment final : public SMSegment {
 
 	std::optional<IPNetwork> source; ///< Source subnet.
 	std::optional<IPNetwork> dest; ///< Destination subnet.
-	bool bidir; ///< Bidirectional flag.
+	bool bidir = false; ///< Bidirectional flag.
 };
 
 /**
diff --git a/tools/ft-generator/src/config/common.cpp b/tools/ft-generator/src/config/common.cpp
index 697f263d..7497d1e6 100644
--- a/tools/ft-generator/src/config/common.cpp
+++ b/tools/ft-generator/src/config/common.cpp
@@ -191,7 +191,7 @@ uint64_t ParseSpeedUnit(const YAML::Node& node)
 		throw ConfigError(node, "invalid speed unit value");
 	}
 
-	return OverflowCheckedMultiply(*value, multiplier * 8);
+	return OverflowCheckedMultiply(*value, multiplier);
 }
 
 void ConfigError::PrintPrettyError(
diff --git a/tools/ft-generator/tests/ftgeneratortests/tests/pcap/test_timestamps.py b/tools/ft-generator/tests/ftgeneratortests/tests/pcap/test_timestamps.py
index 0a881b69..ce5ffe36 100644
--- a/tools/ft-generator/tests/ftgeneratortests/tests/pcap/test_timestamps.py
+++ b/tools/ft-generator/tests/ftgeneratortests/tests/pcap/test_timestamps.py
@@ -32,7 +32,7 @@ def calc_min_gap_nanos(packet_size, link_speed_gbps, min_packet_gap_ns):
 
     transfer_nanos = frame_total * 1_000_000_000 / (link_speed_gbps * 1_000_000_000)
 
-    return min(transfer_nanos, min_packet_gap_ns)
+    return transfer_nanos + min_packet_gap_ns
 
 
 def test_timestamp(ft_generator: Generator):
diff --git a/tools/ft-profile-sampler/src/biflow.cpp b/tools/ft-profile-sampler/src/biflow.cpp
index 64673d30..6d27b520 100644
--- a/tools/ft-profile-sampler/src/biflow.cpp
+++ b/tools/ft-profile-sampler/src/biflow.cpp
@@ -125,7 +125,7 @@ void Biflow::CreateHistogram(ft::Timestamp start, ft::Timestamp interval, unsign
 double Biflow::GetHistogramBin(unsigned idx) const
 {
 	if (pkt_hist.size() == 0) {
-		std::runtime_error("packet histogram has not been created");
+		throw std::runtime_error("packet histogram has not been created");
 	}
 
 	if (idx >= start_window_idx && idx <= end_window_idx) {
diff --git a/tools/ft-profile-sampler/src/evolution.cpp b/tools/ft-profile-sampler/src/evolution.cpp
index bae47949..4723f575 100644
--- a/tools/ft-profile-sampler/src/evolution.cpp
+++ b/tools/ft-profile-sampler/src/evolution.cpp
@@ -35,7 +35,7 @@ void Evolution::CreateInitialPopulation()
 	}
 
 	for (auto& fut : futures) {
-		fut.wait();
+		fut.get();
 	}
 
 	UpdateFitnessStats();
@@ -46,7 +46,7 @@ void Evolution::InitialPopulationWorker(uint64_t seed)
 	uint64_t profileSize = _profile->GetSize();
 	std::mt19937_64 rnd(seed);
 	std::uniform_int_distribution<uint64_t> geneCountDistrib(_minGenesCnt, _maxGenesCnt);
-	std::uniform_int_distribution<uint64_t> geneDistrib(0, profileSize);
+	std::uniform_int_distribution<uint64_t> geneDistrib(0, profileSize - 1);
 	while (true) {
 		{
 			std::lock_guard<std::mutex> lock(_mtx);
diff --git a/tools/ft-profile-sampler/src/metrics.cpp b/tools/ft-profile-sampler/src/metrics.cpp
index f466e2ec..2f92e39f 100644
--- a/tools/ft-profile-sampler/src/metrics.cpp
+++ b/tools/ft-profile-sampler/src/metrics.cpp
@@ -132,7 +132,7 @@ void Metrics::GatherWindowStats(const std::vector<Biflow>& data, unsigned histSi
 		}
 		const auto& biflow = data[i];
 		for (unsigned windowIndex = biflow.start_window_idx / WINDOW_SIZE;
-			 windowIndex <= biflow.end_window_idx / WINDOW_SIZE + 1;
+			 windowIndex <= biflow.end_window_idx / WINDOW_SIZE;
 			 windowIndex++) {
 			double pkts = 0;
 			for (unsigned j = 0; j < WINDOW_SIZE; j++) {
diff --git a/tools/ft-replay/src/dpdkPlugin.cpp b/tools/ft-replay/src/dpdkPlugin.cpp
index 67f76e83..8e0475fb 100644
--- a/tools/ft-replay/src/dpdkPlugin.cpp
+++ b/tools/ft-replay/src/dpdkPlugin.cpp
@@ -30,6 +30,9 @@
 
 namespace replay {
 
+// Ethernet frame overhead: 14-byte header + 4-byte FCS
+static constexpr size_t ETH_OVERHEAD = 18;
+
 // register the dpdk plugin to the factory
 OutputPluginFactoryRegistrator<DpdkPlugin> dpdkPluginRegistration("dpdk");
 
@@ -146,7 +149,7 @@ int DpdkPlugin::GetDpdkPort(const std::string& PCIAddress, struct rte_eth_dev_in
 		throwErr();
 	}
 
-	if (_MTUSize < devInfo->min_mtu || _MTUSize > devInfo->max_mtu) {
+	if ((_MTUSize - ETH_OVERHEAD) < devInfo->min_mtu || (_MTUSize - ETH_OVERHEAD) > devInfo->max_mtu) {
 		_logger->error(
 			"MTU size of out NIC supported range {}-{}",
 			devInfo->min_mtu,
@@ -185,7 +188,7 @@ void DpdkPlugin::ConfigureDpdkPort(uint16_t portId)
 		}
 	}
 
-	ret = rte_eth_dev_set_mtu(portId, _MTUSize);
+	ret = rte_eth_dev_set_mtu(portId, _MTUSize - ETH_OVERHEAD);
 	if (ret < 0) {
 		_logger->error("rte_eth_dev_set_mtu() has failed with code {}", ret);
 		throwErr();
diff --git a/tools/ft-replay/src/packet.hpp b/tools/ft-replay/src/packet.hpp
index d11bcd26..fb9ef1e8 100644
--- a/tools/ft-replay/src/packet.hpp
+++ b/tools/ft-replay/src/packet.hpp
@@ -47,15 +47,15 @@ enum class OutInterface {
  *
  */
 struct PacketInfo {
-	enum L3Type l3Type;
+	L3Type l3Type;
 	uint16_t l3Offset;
 
-	enum L4Type l4Type;
+	L4Type l4Type;
 	uint16_t l4Offset; //< Zero if l4type == L4Type::NotFound
 
 	uint16_t ipAddressesChecksum; //< checksum of IP addresses in host byte order
 
-	enum OutInterface outInterface; //< used for multi-port replaying
+	OutInterface outInterface; //< used for multi-port replaying
 };
 
 /**
diff --git a/tools/ft-replay/src/packetBuilder.cpp b/tools/ft-replay/src/packetBuilder.cpp
index df6c4c17..521bb1da 100644
--- a/tools/ft-replay/src/packetBuilder.cpp
+++ b/tools/ft-replay/src/packetBuilder.cpp
@@ -129,7 +129,7 @@ void PacketBuilder::PresetHwChecksum(Packet& packet)
 	}
 }
 
-int PacketBuilder::DecidePort(const std::byte* rawData, enum L3Type l3Type, uint16_t l3Offset) const
+int PacketBuilder::DecidePort(const std::byte* rawData, L3Type l3Type, uint16_t l3Offset) const
 {
 	if (l3Type == L3Type::IPv4) {
 		const iphdr* ipHeader = reinterpret_cast<const iphdr*>(rawData + l3Offset);
@@ -254,7 +254,7 @@ PacketInfo PacketBuilder::GetPacketInfo(const RawPacket* rawPacket) const
 		info.l4Type = LayerToL4Protocol(l4Layer._type);
 	}
 
-	if (DecidePort(rawPacket->data, info.l3Type, info.l3Offset) < 0) {
+	if (DecidePort(rawPacket->data, info.l3Type, info.l3Offset) <= 0) {
 		info.outInterface = OutInterface::Interface0;
 	} else {
 		info.outInterface = OutInterface::Interface1;
diff --git a/tools/ft-replay/src/packetBuilder.hpp b/tools/ft-replay/src/packetBuilder.hpp
index 686462b5..7b7e10cc 100644
--- a/tools/ft-replay/src/packetBuilder.hpp
+++ b/tools/ft-replay/src/packetBuilder.hpp
@@ -97,7 +97,7 @@ class PacketBuilder {
 	std::unique_ptr<std::byte[]> GetDataCopyWithVlan(const std::byte* rawData, uint16_t dataLen);
 	void ValidatePacketLength(uint16_t packetLength) const;
 	void PresetHwChecksum(Packet& packet);
-	int DecidePort(const std::byte* rawData, enum L3Type l3Type, uint16_t l3Offset) const;
+	int DecidePort(const std::byte* rawData, L3Type l3Type, uint16_t l3Offset) const;
 
 	uint16_t _vlanID = 0;
 	double _timeMultiplier = 1.0;