This repository contains the code used in my graphviz tutorial blog post.
Look through the history of the repository to see the steps that I used to create the network diagram. Each step has the code and the resultant image that was created.
Once graphviz was installed correctly, I used the command:
dot.exe -Tpng graph.graphviz -o graph.png
to create the images.
(Or, use make on a GNU/Linux system)
The Cisco icons can be downloaded separately.
(converted the .jpg to .png)