To create the topology in mininet, follow the instructions bellow:

   1. ./testtopology.py -t <time for simulations in seconds>
   
       This will open xterm for hosts you would like to open. Then run your codes on each xterm and see the results.

  2. Prio to running the above code, please mentioned xterm for hosts, for example,
    
     A.cmd(‘xterm&’)
     B.cmd(’xterm&’)
     etc…
 
Note:  Each link in the topology is set to 10Mbps of bandwidth, and 10ms of link delay. This is for reference. Good Luck!