The environment first
This project need a background of networking and SDN. Follow the instruction to setup the environment first, the Virtual Box Image download address is (THIS IS VERY IMPORTANT!!!): https://www.nyu.edu/classes/jcf/CSCI-GA.2262-001/demos/Mininet_VM.ova
The recommended package file I attached for the section 4.2 named finalproject-part4-code.zip.