diff --git a/scripts/iperf_test.sh b/scripts/iperf_test.sh
new file mode 100644
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--- /dev/null
+++ b/scripts/iperf_test.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+#  iperf test.sh
+#  published as part of https://github.com/pConst/basic_verilog
+#  Konstantin Pavlov, pavlovconst@gmail.com
+
+# allows to test network performance on single local machine with two ports
+
+
+
+# create namespaces to force linux to pass data through the cable
+sudo ip netns add ns_server
+sudo ip netns add ns_client
+sudo ip link set enp1s0f0 netns ns_server
+sudo ip netns exec ns_server ip addr add dev enp1s0f0 192.168.2.1/24
+sudo ip netns exec ns_server ip link set dev enp1s0f0 up
+sudo ip link set enp1s0f1 netns ns_client
+sudo ip netns exec ns_client ip addr add dev enp1s0f1 192.168.2.2/24
+sudo ip netns exec ns_client ip link set dev enp1s0f1 up
+
+# start server (first terminal window)
+sudo ip netns exec ns_server iperf -s 192.168.2.1
+
+# start client (second termonal window)
+sudo ip netns exec ns_client iperf -c 192.168.2.1 -d -i1 -t60
+
+# remove namespaces
+sudo ip netns del ns_server
+sudo ip netns del ns_client
+