The Common Open Research Emulator (CORE) is a tool for emulating networks on one or more machines. You can connect these emulated networks to live networks. CORE consists of a GUI for drawing topologies of lightweight virtual machines, and Python modules for scripting network emulation.

CORE Screenshot

CORE has been developed by a Network Technology research group that is part of the Boeing Research and Technology division. The Naval Research Laboratory is supporting further development of this open source project.

Key Features

  • Network lab in a box
    • Efficient and scalable
    • Easy-to-use GUI canvas
    • Centralized configuration and control
  • Runs applications and protocols without modifying them
  • Real-time connection to live networks
    • Hardware-in-the-loop
    • Distributed with multiple COREs
  • Highly customizable

CORE Demonstrations

Click on a topic below for a short demonstration. These movies require Flash.

  1. Introduction to CORE
  2. Wireless (MANET) Networks
  3. Links and Services
  4. Distributed Emulation
  5. Play All

CORE Documentation

The CORE Documentation covers installation, usage, and more. The CORE Developer's Guide covers the CORE API, which allows other systems to interact with the CORE emulation. This API is also used for communication between the different components of CORE. CORE Python Scripting Documentation is also available.

CORE Downloads

The latest CORE source and releases are available on GitHub at

For more instructions on what to do with the downloaded files, please see the Installation section of the CORE manual.

Contact Info

For more information on CORE, please contact


Academic publications that use CORE are requested to cite the following publication:

Comparison of CORE Network Emulation Platforms, Proceedings of IEEE MILCOM Conference, 2010, pp.864-869.