What is OMNeT++?

 OMNeT++ is an extensible, modular, component-based C++ simulation library and framework, primarily for building network simulators. "Network" is meant in a broader sense that includes wired and wireless communication networks, on-chip networks, queueing networks, and so on. Domain-specific functionality such as support for sensor networks, wireless ad-hoc networks, Internet protocols, performance modeling, photonic networks, etc., is provided by model frameworks, developed as independent projects. OMNeT++ offers an Eclipse-based IDE, a graphical runtime environment, and a host of other tools. There are extensions for real-time simulation, network emulation, database integration, SystemC integration, and several other functions.

Although OMNeT++ is not a network simulator itself, it has gained widespread popularity as a network simulation platform in the scientific community as well as in industrial settings, and building up a large user community.

OMNeT++ provides a component architecture for models. Components (modules) are programmed in C++, then assembled into larger components and models using a high-level language (NED). Reusability of models comes for free. OMNeT++ has extensive GUI support, and due to its modular architecture, the simulation kernel (and models) can be embedded easily into your applications.

Check the screenshots if you are interested how the IDE and running simulations look like.


  • simulation kernel library
  • NED topology description language
  • OMNeT++ IDE based on the Eclipse platform
  • GUI for simulation execution, links into simulation executable (Tkenv)
  • command-line user interface for simulation execution (Cmdenv)
  • utilities (makefile creation tool, etc.)
  • documentation, sample simulations, etc.


OMNeT++ runs on Windows, Linux, Mac OS X, and other Unix-like systems.

The OMNeT++ IDE requires Windows, Linux, or Mac OS X.


OMNeT++ has been originally developed by András Varga. See Credits, acknowledgements.