FlexGridSim is a discrete event Flexible Grid Optical Network Simulator (Elastic Optical Network), based on the WDMSim.

It is a simple simulator written in Java that allows the simulation of routing and spectrum scenarios in single/multi-hop Optical FlexGrid/EON networks. Its main advantage is the simplified interface for the introduction of new algorithms.

Created by Pedro Moura in the Computer Networks Laboratory, Institute Of Computing, UNICAMP.