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OpenFlow SDN

Learn SDN with OpenFlow

contributors last update forks stars open issues license

Documentation • Report Bug • Request Feature


📖 Table of Contents

Key features

Getting start

This project with aim to learn SDN using Linear topology with OpenFlow

Linear topology: each switch has one host

Linear topology

Prerequisites

  • SSHPass: install instruction here
  • Virtualbox: >= v6.1.0, download here

Run locally

Clone this repository

git clone https://github.com/HCMUS-Project-Org/openflow-sdn.git

Auto download, run and config Mininet VM

In mininet_setup.sh, it's automatic:

  • Set Port Forwarding for SSH with Host Port: 2222 and Guest Port: 22
  • Add virtual machine to Known Hosts
  • Copy l2_pairs.py file to Mininet machine
bash ./mininet_setup.sh

Connect to Mininet VM (with -X flag for X11 forwarding)

Mininet default account:

  • Username: mininet
  • Password: mininet
sshpass -p "mininet" ssh mininet@localhost -p 2222 -X
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-42-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

New release '22.04.3 LTS' available.
Run 'do-release-upgrade' to upgrade to it.

Last login: Wed Feb 10 21:03:31 2021
mininet@mininet-vm:~$

Install Linear topology with 4 Switch in Mininet machine

sudo -E mn --controller=remote,ip=127.0.0.1 --mac -i 10.1.1.0/24 --switch=ovsk --topo=linear,4
*** Creating network
*** Adding controller
Unable to contact the remote controller at 127.0.0.1:6653
Unable to contact the remote controller at 127.0.0.1:6633
Setting remote controller to 127.0.0.1:6653
*** Adding hosts:
h1 h2 h3 h4
*** Adding switches:
s1 s2 s3 s4
*** Adding links:
(h1, s1) (h2, s2) (h3, s3) (h4, s4) (s2, s1) (s3, s2) (s4, s3)
*** Configuring hosts
h1 h2 h3 h4
*** Starting controller
c0
*** Starting 4 switches
s1 s2 s3 s4 ...
*** Starting CLI:

Run POX controller with l2_pairs

sudo ~/pox/pox.py forwarding.l2_pairs info.packet_dump samples.pretty_log log.level --DEBUG
POX 0.7.0 (gar) / Copyright 2011-2020 James McCauley, et al.
INFO:forwarding.l2_pairs:Pair-Learning switch running.
INFO:info.packet_dump:Packet dumper running
[core] POX 0.7.0 (gar) going up...
[core] Running on CPython (3.8.5/Jul 28 2020 12:59:40)
[core] Platform is Linux-5.4.0-42-generic-x86_64-with-glibc2.29
[version] Support for Python 3 is experimental.
[core] POX 0.7.0 (gar) is up.
[openflow.of_01] Listening on 0.0.0.0:6633
[openflow.of_01] [00-00-00-00-00-04 2] connected
[openflow.of_01] [00-00-00-00-00-01 3] connected
[openflow.of_01] [00-00-00-00-00-03 4] connected
[openflow.of_01] [00-00-00-00-00-02 5] connected

In Mininet machine run h1 ping h2

h1 ping h2 -c 1
PING 10.1.1.2 (10.1.1.2) 56(84) bytes of data.
64 bytes from 10.1.1.2: icmp_seq=1 ttl=64 time=10.7 ms
--- 10.1.1.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 10.675/10.675/10.675/0.000 ms

Watch POX controller's logs

sudo ~/pox/pox.py forwarding.l2_pairs info.packet_dump samples.pretty_log log.level --DEBUG
POX 0.7.0 (gar) / Copyright 2011-2020 James McCauley, et al.
INFO:forwarding.l2_pairs:Pair-Learning switch running.
INFO:info.packet_dump:Packet dumper running
[core] POX 0.7.0 (gar) going up...
[core] Running on CPython (3.8.5/Jul 28 2020 12:59:40)
[core] Platform is Linux-5.4.0-42-generic-x86_64-with-glibc2.29
[version] Support for Python 3 is experimental.
[core] POX 0.7.0 (gar) is up.
[openflow.of_01] Listening on 0.0.0.0:6633
[openflow.of_01] [00-00-00-00-00-04 2] connected
[openflow.of_01] [00-00-00-00-00-01 3] connected
[openflow.of_01] [00-00-00-00-00-03 4] connected
[openflow.of_01] [00-00-00-00-00-02 5] connected
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 1
[forwarding.l2_pairs] Packet dest : ff:ff:ff:ff:ff:ff -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-01 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : ff:ff:ff:ff:ff:ff -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-02 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : ff:ff:ff:ff:ff:ff -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-03 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:02 -- port: 1
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] >> FLOW MOD
[forwarding.l2_pairs] Installing 00:00:00:00:00:02 -> 00:00:00:00:00:01
[dump:00-00-00-00-00-02 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : ff:ff:ff:ff:ff:ff -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-04 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:02 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:01 -- port: 1
[forwarding.l2_pairs] >> FLOW MOD
[forwarding.l2_pairs] Installing 00:00:00:00:00:02 -> 00:00:00:00:00:01
[dump:00-00-00-00-00-01 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 1
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: 2
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-01 ] [ethernet][ipv4][icmp][echo][56 bytes]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: 1
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-02 ] [ethernet][ipv4][icmp][echo][56 bytes]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-03 ] [ethernet][ipv4][icmp][echo][56 bytes]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-04 ] [ethernet][ipv4][icmp][echo][56 bytes]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 1
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: 2
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-01 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: 1
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-02 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-03 ] [ethernet][arp]
[forwarding.l2_pairs] --------------------------------------------
[forwarding.l2_pairs] Packet source: 00:00:00:00:00:01 -- port: 2
[forwarding.l2_pairs] Packet dest : 00:00:00:00:00:02 -- port: None
[forwarding.l2_pairs] >> FLOOD
[dump:00-00-00-00-00-04 ] [ethernet][arp]

Note If you're using Linux Bash for Windows, see this guide or use node from the command prompt.

Contributors

Contributions are always welcome!

Credits

This software uses the following open source packages:

Emoji and Badges from:

License

Distributed under the MIT License. See LICENSE for more information.

Bento @quanblue  ·  GitHub @QuanBlue  ·  Gmail quannguyenthanh558@gmail.com

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Learn SDN with OpenFlow

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