Differences

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--- qos_project [2017/12/14 10:09] – [7. [PO2] Implementing QoS] carine
+++ qos_project [2017/12/19 09:11] – [8. [PO3] Analyzing QoS] carine
@@ Line 284: / Line 284: @@
 Supposing we have two types of traffic: Video UDP associated with class 1:40 running on destination port 1234, and iperf UDP with class 1:50 running on destination port 5201. In the first case, the dedicated bandwidth is ((87/100)*8000)= 6960 Kbit and in the second case it's 1040 Kbit.
 The following commands are used:
-<code bash> tc class add dev eth1 parent 1:1 classid 1:40 hfsc ls rate 6960kbit ul rate 6960kbit </code>
+<code bash> tc class add dev eth1 parent 1:1 classid 1:40 hfsc ls rate 6960kbit ul rate 8000kbit </code>
-<code bash> tc class add dev eth1 parent 1:1 classid 1:50 hfsc ls rate 1040kbit ul rate 1040kbit </code>
+<code bash> tc class add dev eth1 parent 1:1 classid 1:50 hfsc ls rate 1040kbit ul rate 8000kbit </code>
-<code bash> iptables -t mangle -A -POSTROUTING -o eth1 -p udp --dport 1234 -j CLASSIFY --set-class 1:40 </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p udp --dport 1234 -j CLASSIFY --set-class 1:40 </code>
-<code bash> iptables -t mangle -A -POSTROUTING -o eth1 -p udp --dport 5201 -j CLASSIFY --set-class 1:50 </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p udp --dport 5201 -j CLASSIFY --set-class 1:50 </code>
+To see the iptables commands excecuted on the router we can use:
+<code bash> iptables -t mangle -L </code>
+===== -. [PO3] Analyzing QoS  =====
+ In this section, we have to consider different congestion scenarios: The link between the two routers will have a bandwidth of 16 Mb/s, 8 Mb/s and 5 Mb/s.For each case, we will be considering both the implementation and the absence of QoS.
+__**1. 16Mb/s**__
+- __Without QoS:__
+We have to create two different classes with exactly the same bandwidth allocated for each as if no QoS is applied. The following commands are used:
+<code bash> tc class add dev eth1 parent 1:1 classid 1:10 hfsc ls rate 16000kbit ul rate 16000kbit </code>
+<code bash> tc class add dev eth1 parent 1:1 classid 1:20 hfsc ls rate 16000kbit ul rate 16000kbit </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p udp --dport 1234 -j CLASSIFY --set-class 1:10 </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p udp --dport 5201 -j CLASSIFY --set-class 1:10 </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p tcp --dport 5202 -j CLASSIFY --set-class 1:20 </code>
+- __With QoS:__
+First, we have to create a common class 1:1 for all types of traffic, as before.
+Then, the following commands are executed in order to create two classes: 1:20 for video udp traffic with a bandwidth of ((87*16000)/100) and 1:30 for iperf tcp and udp traffic with a bandwidth of ((13*16000)/100).
+<code bash> tc class add dev eth1 parent 1:1 classid 1:20 hfsc ls rate 13920kbit ul rate 16000kbit </code>
+<code bash> tc class add dev eth1 parent 1:1 classid 1:30 hfsc ls rate 2080kbit ul rate 16000kbit </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p udp --dport 1234 -j CLASSIFY --set-class 1:20 </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p udp --dport 5201 -j CLASSIFY --set-class 1:30 </code>
+<code bash> iptables -t mangle -A POSTROUTING -o eth1 -p tcp --dport 5202 -j CLASSIFY --set-class 1:30 </code>
+We will be running three types of traffic:
+  * VLC video udp
+  * iperf udp traffic on destination port 5201
+**On the client side:**
+<code bash> iperf3 -c 192.168.100.111 -u -b 50M -P 3 -t 80 -p 5201 </code>
+  * iperf tcp traffic on destination port 5202, using the following commands:
+**On the server side:**
+<code bash> iperf3 -s -p 5202 </code>
+**On the client side:**
+<code bash> iperf3 -c 192.168.100.111 -P 3 -p 5202 -t 75 </code>
+The same commands found above are applied when configuring the link with a bandwidth of 4Mb/s and 8Mb/s.