Welcome to the OMNeT++ Community!

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, alternative programming languages (Java, C#), database integration, SystemC integration, and several other functions.

OMNeT++ is free for academic and non-profit use, and it is a widely used platform in the global scientific community. Commercial users must obtain a license from More...

Featured Projects:

   INET Framework (Internet and LAN protocols)   INETMANET (mobile and ad-hoc networks)   Oversim (peer-to-peer networks)   Veins - Vehicles in Network Simulation    ReaSE (realistic Internet simulations)   MiXiM (detailed wireless simulations)   Castalia (wireless sensor and body area networks)   More...

New users: Watch the screencast for an introduction into the Simulation IDE, or see in the publications list what OMNeT++ has been used for. Check out some tutorials, browse the documentation, watch introductory videos, and explore the featured network simulation projects (click the logos above)!

OMNeT++ 4.3.1 released
Tuesday, 17 September 2013 08:44
OMNeT++ 4.3.1 is now available for download. With this update, we made it a lot easier for first-time users to get started with OMNeT++: on the first startup, the IDE shows some useful bits of information, and also offers installing the INET Framework. In addition, the update also contains some bug fixes and smaller improvements to the Simulation IDE. There is no change in the simulation kernel and tools. Read the ChangeLog (after the More link) for details, or go directly to the download page.
INET-2.2 released
Friday, 23 August 2013 13:58

We are happy to announce the INET Framework 2.2 release. INET is an open-source communication networks simulation package for the OMNeT++ simulation environment. It contains models for several wired and wireless networking protocols, including UDP, TCP, SCTP, IP, IPv6, Ethernet, PPP, 802.11, MPLS, OSPF, and many others. This version introduces support for simulating node shutdown, crash and restart; adds TCP Vegas and Westwood, IdealWirelessNic, and new SCTP protocol features; and contains many other improvements and bug fixes.

Visit the INET Framework website to download it.

OS³, the Open Source Satellite Simulator
Wednesday, 14 August 2013 14:52
The OS³ (Open Source Satellite Simulator) model was ported to INET 2.1+ and is available on github. If you want to model satellite based communication, you will need accurate satellite mobility model.

OS³, the Open Source Satellite Simulator, was developed as a framework for simulating various kinds of satellite-based communication, based on OMNeT++. The aim was to create a platform that makes evaluating satellite communication protocols as easy as possible. OS³ is also be able to automatically import real satellite tracks and weather data to simulate conditions at a certain point in the past or in the future, and offer powerful visualization. 

Visit the GitHub repo. Note that the software's homepage still contains an older version of the model which is not compatible with the latest INET version.
InfiniBand Flit Level Model (v2) released
Wednesday, 22 May 2013 00:00
This Mellanox-contributed InfiniBand simulation model is modeling the data-path of hosts and switches at the flit transfer level. The model can be used to estimate network performance under configurable hardware capabilities, timing and topologies. 
Vehicular Networks Simulator (VNS) released
Tuesday, 07 May 2013 00:00

VNS is a high-performance simulator for vehicular networks. It was developed by Ricardo Fernandes at DCC-FCUP and Instituto de Telecomunicações | Porto, supported by the Portuguese Foundation for Science and Technology (FCT) under the doctoral grant (SFRH/BD/61676/2009). VNS is a simulation framework that completely integrates the mobility and network components in a transparent and efficient way, reducing the overhead of communication and synchronization between different simulators. VNS provides bi-directionally interaction between a microscopic mobility model and network simulators such as NS-3 or OMNET++. Visit the website.

OppBSD 4.0 released
Monday, 15 April 2013 13:48

OppBSD integrates essential parts of the real FreeBSD networking stack into OMNeT++ as a simulation model. Every simulated host (or router) runs its own copy of the FreeBSD kernel's networking stack. Consequently, the simulation model is very accurate, i.e., almost behaving like a real implementation. Release 4.0 works with OMNeT++ v4.3 (alternatively v4.1, v4.2) and provides IPv6 support. Presently, the package covers the full TCP/IP stack including IPv4, IPv6, UDP, TCP, ICMP, ICMPv6, ARP, ND, sockets and Ethernet frames. See the OppBSD website for download.

OMNeT++ 4.3 released
Wednesday, 03 April 2013 00:00

OMNeT++ 4.3 final version is now available for download. This release contains several bugfixes and usability improvements compared to 4.2.2. Among other improvements, indexing of big C++ projects got considerably faster and it is now possible to create scalar statistics from other statistic values. Read the ChangeLog (after the More link) to see the complete list what 4.3 has to offer compared to version 4.2 or go directly to the download page and test it.

INET 2.1 released
Monday, 04 February 2013 00:00
We are happy to announce the INET Framework 2.1 release. The INET Framework is an open-source communication networks simulation package for the OMNeT++ simulation environment. It contains models for several wired and wireless networking protocols, including UDP, TCP, SCTP, IP, IPv6, Ethernet, PPP, 802.11, MPLS, OSPF, and many others.  This new version is compatible with the the 2.0 version and contains only bugfixes and some additional components.

Visit the INET Framework website and download it now. Read on for details.
OverSim-20121206 released
Thursday, 06 December 2012 00:00

Ingmar Baumgart has announced OverSim release 20121206. You can download OverSim-20121206 from the download area of

These are the changes since the 20101103 release:

  • Compatible with OMNeT++ 4.2.2 and gcc 4.7
  • Complete rewrite of Pastry and Bamboo using OverSim's RPC interface
  • SimpleUnderlay: added optional tx queue for the destination access router (parameter enableAccessRouterTxQueue)
  • InetUnderlay now depends on unmodified INET-20111118
  • Many other bugfixes and enhancements (take a look at doc/ChangeLog)
Call for Papers -- 6th International Workshop on OMNeT++
Tuesday, 30 October 2012 21:43

The 6th International OMNeT++ Workshop will be held on March 5th, 2013 in Cannes, French Riviera. All submissions to the workshop should be of interest to the general simulation and modeling community, with OMNeT++ playing a key role. We welcome case-studies that employ OMNeT++ in the evaluation of new systems as well as contributions addressing general questions of simulation using OMNeT++. For model-centric submissions we encourage the publication of source code on the authors' website at the time of submission.

We invite two types of submissions:

  • Full and short papers of 4 to 8 pages answering open research questions, introducing novel simulation techniques, or addressing questions of accurate and efficient modeling for simulation.
  • Poster abstracts of 2 to 4 pages describing work in progress, provoking research questions in the context of the workshop, or code contributions that sketch the underlying model.

Submissions that are accepted and presented at the workshop will appear in the SIMUTools 2013 proceedings, on CD, in EU-DL, and in the ACM Digital Library (pending approval). Read the full Call for Papers

Submission deadline: December 8, 2012 23:59 UTC (firm deadline)

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