There are 2 repositories under vpls topic.
The BGP swiss army knife of networking
Implementation of Efficient Energy-Compensated VPLs using Photon Splatting (and various rendering techniques)
Shakh Implementation of SDVPN article just for having more fun
EXPERIMENTAL - A study of Code Generation in Visual Programming Languages featuring Flowgorithm to autogenerate coding in multiple languages . Also using Pseudo code autogenerated in Flowgorithm to outline manual code generation in languages NOT supported by Flowgorithm.lang