In this project I implement the spanning tree protocol using Python. The Spanning Tree protocol is used to build loop free networks while still allowing backup links for fault tolerance. The STP algorithm creates a spanning tree within a set of connected bridges/switches by disabling links that are not part of the spanning tree.

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

To run this code you need mininet installed on your machine. For instructions on how to install mininet please refer to this link

Once mininet has been installed on your machine you are ready to run the program.

Start by opening mininet with the following code:

sudo mn --custom projecttopo.py --topo projecttopo

Next, open four nodes using xterm.

xterm b1 b2 b3 b4

For each opened node run the code by typing the following.

python bridge.py

Each node will begin the Spanning Tree algorithm until a root is established. Once a root is established, the root will send BPDU's every 5 seconds. Each Node will forward the BPDU to their Designated ports.

To quit the algorithm press ctrl-c

ctrl-c

• Rick Boshae - Personal Website

This project is licensed under the MIT License - see the LICENSE.md file for details

• Dr. Mart Molle
• Elizabeth Liri