SOURCEFORGE » RALF » 2015 Improving TCP over satellite QoE

h3. 2. Simulation program

h4. 2.1. Simulation

Insertion des lignes de commandes SANS MODEM

# 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

h4. 2.2. Post processing

Use of iperf and tcpdump as hereafter

Then we collect three parameters in order to analyse the network :

- the latency;

- the jitter;

- the loss of packets.

# Save data, from management computer (192.168.0.102)

scp labo@192.168.0.201:Proj3/*. 

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.