Simple_Mininet_tutorial.md

Goal: Setting up a custom topo.

Dependencies: This tutorial only uses Simple_Pkt_Topo.py from the repo.

Environment: I have used the VM from sdn hub, I recommond you do the same. Link for installation is provided below: http://sdnhub.org/tutorials/sdn-tutorial-vm/

Start the network:

In order to start the network you only need to run the command sudo -E python <filename> which in our case would be:

sudo -E python Simple_Pkt_Topo.py

When you run that you should see:

ubuntu@sdnhubvm:~/code/SDN[12:49] (master)$ sudo -E python Simple_Pkt_Topo.py 
Unable to contact the remote controller at 0.0.0.0:6633
*** Creating network
*** Adding hosts:
h1 h2 h3 h4 
*** Adding switches:
s1 s2 s3 s4 
*** Adding links:
(h1, s1) (h2, s2) (h3, s3) (h4, s4) (s1, s2) (s1, s3) (s1, s4) 
*** Configuring hosts
h1 (cfs -1/100000us) h2 (cfs -1/100000us) h3 (cfs -1/100000us) h4 (cfs -1/100000us) 
*** Starting controller
c 
*** Starting 4 switches
s1 s2 s3 s4 ...
*** Starting CLI:
mininet> 

Note that since you have not started any controller, the pingall is failing.

mininet> pingall
*** Ping: testing ping reachability
h1 -> X X X 
h2 -> X X X 
h3 -> X X X 
h4 -> X X X 
*** Results: 100% dropped (0/12 received)
mininet> 

Stoping the Mininet

In the minint run quit. When it doesn also run sudo mn -c, this will clean the environment.