1. Programming Assignment #3
Implementing a virtual network using Mininet
controllers : POX(python) - Floodlight (Java)
Due: 11:55PM Sunday Nov. 19th
submit to Moodle site
Hello everyone. Now I’m gonna introduce something about socket programming. First we will try to get a general idea about what socket is. Then we will introduce socket programming with Java and socket programming with Python. The corresponding reading material is the Section 2.7 in Chapter 2, and the project 1 description.
Project III Description (here)
CSci4211: Programming Assignment #3

2. CSci4211: Programming Assignment #3
What should we do?
Install Mininet and do the walkthrough to get familiar with the commands and the environment
Install a controller
POX :
cd ~/pox
Then, start the hub: $ pox.py log.level –DEBUG forwarding.hub
Floodlight
Java-based intended to run with standard JDK tools
cd ~/floodlight and run ant
Java -jar target/floodlight.jar
CSci4211: Programming Assignment #3

3. CSci4211: Programming Assignment #3
How to use the VM
Download the image from here
Install a virtualbox ( e.g. Oracle )
Run the virtualbox and import the image
CSci4211: Programming Assignment #3

4. CSci4211: Programming Assignment #3
After Importing
CSci4211: Programming Assignment #3

5. CSci4211: Programming Assignment #3
After Running
username:
mininet
password:
CSci4211: Programming Assignment #3

6. After Running
run ‘ifconfig’ command on the virtual box and get the VM’s Ip address from eth0
using a terminal in your computer, run
ssh -x IP address to connect
the password is mininet
easier for copying and pasting the output

7. How to have files in the VM?
use <scp> command if you can <ssh> to the VM
scp <local file> <VM machine IP>:<VM path>
scp ~/Desktop/Project3/upload/part2/simple_routing.py
$ ifconfig -a
The IP should be x.x which is a host-only interface
Run the file
$ cd pox
$ ./pox.py samples.simple_routing
CSci4211: Programming Assignment #3

8. Run the controller and topology code
Check the switch tables
CSci4211: Programming Assignment #3

9. how to use the controller?
CSci4211: Programming Assignment #3

10. CSci4211: Programming Assignment #3
What controllers need?
Implement the simplest way to add up entries to flow tables and learn the network
How?
when a packet is received at the controller for the first time, add an entry mapping <switch input port> to < src address>
If there is no entry for the packet,tell the switch to flood it to all the ports
If there exist a entry for the packet, install a flow entry on switch, setting the output port
CSci4211: Programming Assignment #3

11. CSci4211: Programming Assignment #3
Topology
CSci4211: Programming Assignment #3

12. CSci4211: Programming Assignment #3
what to measure?
Link Latency and Throughput
use ping and iperf for t = 20 and intervals of 1 second
write down the results for each link
Path Latency and Throughput between h1 and h5
use ping and iperf
CSci4211: Programming Assignment #3

13. CSci4211: Programming Assignment #3
Build a topology
CSci4211: Programming Assignment #3

14. some cool resources to check
Introduction to Mininet
Mininet Remote Controller

15. Q&A
CSci4211: Programming Assignment #3

16. Take Home Quiz 1 & Other Tidbits
Take-Home Quiz I: graded (rather leniently)!
statistics: Max. 100, Median 80, Mean 75, Min. 36
Points # people
[80-89]
[70-79]
[60-69] 4
[50-59] 4
[0-49]
Total 75
Please feel free to talk to us if you have questions, especially if you didn’t do well
Please check “Important Dates” for upcoming deadlines!
CSci4211: Weekly Summary