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CUSTOM TOPOLOGY IN MININET


CREATE CUSTOM TOPOLOGY IN MININET

To create a custom topology in the mininet environment, we are going to use a python code.
It is very simple, no need to acquire deep knowledge of python programming language especially for this task.

1. Import necessary packages

*Topo
from mininet.topo import Topo
subpackage topo is being imported from the package mininet.

2. Create a class object

class MYTOPO ( Topo ) :
(Don't forget to have a similar class name and filename)

3. Create init method

init method in python has similar functions as constructors in java.
def __init__( self ):
   Topo.__init__( self )

4. Add Hosts

Hostname=self.addHost ( "hostname" )

5. Add switches

switch_name=self.addSwitch ( "switch name" )

6. Add links

self.addLink ( "node name 1", "node name 2" )

7. Name your topology

Finally, we name the topo to call it in the command line.

topos = { 'cust': ( lambda: MYTOPO() )}

Here 'cust' is the topology name and MYTOPO is the class name and filename.

8. Save the file.



 Our topology is already created.

To run the topology in mininet use,
sudo mn --custom MYTOPO.py --topo cust

Make sure to give the appropriate path of the file.

Our custom topology is ready to use!

Hope this was helpful!
Feel free to express your remarks in the comments.

Good luck!


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