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--- qos_project [2017/11/30 18:48] – [5. [CO1] Connecting the Platform] samer
+++ qos_project [2017/11/30 19:40] – [6.2. Flent Tool] samer
@@ Line 203: / Line 203: @@
 </code>
 ===== -. [CO2] Implementing the Applications and Tools =====
-In order to describe and analyze the basic steps for installing and using the tools and client/server applications, we need to look carefully to these 4 applications: iperf, flent, VLC, HTTP.
+In order to describe and analyze the basic steps for installing and using the tools and client/server applications, we need to look carefully to these four applications: iperf, flent, VLC, HTTP.
-Let's start with the application iperf:
+==== -. iperf tool ====
-- To activate iperf3:
+Let us start with the application iperf. In the following, we present a short tutorial on the main functions of the perf tool.
-	    * On the server side: iperf3 -s
-	    * On the client side: iperf3 -c 192.168.200.192
-- To visualize UDP trafic with a specific bandwidth:
+  * To launch iperf3:
-	    * On the client side: iperf3 -c 192.168.200.192 -u -b 2M
+    * On the server side: ''iperf3 -s''
-Here we set the bandwidth with UDP to 2Mbit/s.
+    * On the client side: ''iperf3 -c 192.168.200.192'', where 192.168.200.192is the IP address of the server.
-Note that by default ,UDP sets the bandwidth to 1Mbit/s
-- To extend the transmission time(second) as well as the number packets sent:
+  * By default, the trafic sent by iperf uses TCP. In order to send UDP trafic with a specific bandwidth:
-	    * On the Client side: iperf3 -c 192.168.200.192 -t 15
+    * On the client side: iperf3 -c 192.168.200.192 -u -b 2M
-Note that  by default, iperf3 sets the time to 10 seconds
-- To reverse mode(server sends, client receives):
+Here we set the bandwidth with UDP to 2Mbit/s. Note that by default, UDP sets the bandwidth to 1Mbit/s.
-	    * On the Client side: iper3 -c 192.168.200.192 -R
-- To end multiple flows:
+  * To extend the transmission time(second) as well as the number packets sent:
-	    * On the Client side: iper3 -c 192.168.200.192 -P 2 -t 60
+     * On the Client side: ''iperf3 -c 192.168.200.192 -t 15''
-Here we are sending 2 flows in 1 min(60 seconds)
+Note that by default, iperf3 sets the time to 10 seconds.
-Note that we need to extend more the tx time in order to have similar throughput for the 2 flows so that we don't consider it as a fairness issue.
-Let's analyze flent application:
+  * To use reverse mode (server sends the trafic and client receives):
-            * On the Server side: netserver &
+    * On the Client side: ''iper3 -c 192.168.200.192 -R''
--To visualize one TCP stream:
-            * On the Client side:  flent tcp_upload -p totals -l 60 -H 192.168.200.192 -t title2 -o test2.png
--To visualize 12 TCP streams:
-            * On the Client side:  flent tcp_12up -p totals -l 60 -H 192.168.200.192 -t title3 -o test3.png
+  * To send multiple flows:
+    * On the Client side: ''iper3 -c 192.168.200.192 -P 2 -t 60''
+Here we are sending two flows for one minute (60 seconds). We note that the average rate for the two flows can be different. However, this is not a fairness issue: we only need to extend the transmit time in order to have similar throughput for the two flows.
+==== -. Flent Tool ====
+Let us now analyze [[ https://flent.org/index.html | Flent]] application. Flent is a network benchmarking tools which allows to easily run network tests.
+  * On the Server side: ''netserver &''
+  * To sent one TCP stream from the client to the server:
+    * On the Client side:  ''flent tcp_upload -p totals -l 60 -H 192.168.200.192 -t title2 -o test2.png''
+  * To send 12 TCP streams:
+     * On the Client side:  ''flent tcp_12up -p totals -l 60 -H 192.168.200.192 -t title3 -o test3.png''
@@ Line 246: / Line 246: @@
-===== Extracts =====