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MOURA, Ninon, 03/23/2016 12:33 AM
2. Simulation program¶
2.1. Simulation¶
Insertion des lignes de commandes SANS MODEM sur PEP right:
#!/bin/bash
Remote Terminal: ssh connexion
ssh labo@192.168.0.200
Super User Connexion
sudo su
- Definition of p5p1 IP adress
ifconfig p5p1 192.168.2.2 - Definition of p6p1 IP adress
ifconfig p5p1 192.168.3.1
- Add space delay to user interface
tc qdisc add dev p5p1 root netem delay 600ms
- Test connection and delay
- from 192.168.2.1 to 192.168.3.1
ping 192.168.3.1 -I 192.168.2.1
- Re-routing rule to in order to use PEPSal
iptables -t mangle -A PREROUTING -s 192.168.2.1 --proto tcp --tcp-flags ALL SYN -j QUEUE
iptables -t nat -A PREROUTING -s 192.168.2.1 --proto tcp -j REDIRECT --to-port 5000
iptables -t mangle -A PREROUTING -d 192.168.3.1 --proto tcp --tcp-flags ALL SYN -j QUEUE
iptables -t nat -A PREROUTING -d 192.168.3.1 --proto tcp -j REDIRECT --to-port 5000
- Display all rules
iptables -t mangle -t nat -L
- Proxy PEPSal
- pepsal -a 192.168.2.1
Then a TCP flow is simulated thanks to the iperf command.
2.2. Post processing¶
In order to get information on TCP packets, the tcpdump commmand is executed. The save option is run and data are collected in a file.pcap.
Command is:
tcpdump tcp -w fileName.pcap
- Files transfert from PC engine right to local computer
scp labo@192.168.0.201:Proj3/*.
- throughput,
- sequence number packets,
- windows size evolution.
Tests in terms of quality of usage, such as download a web browser, were planed. However due to difficulties in network configuration, those tests will not be run.