This is the simulator that I use, so this is the only simulator that
I know about directly.
PDNS (Parallel/Distributed NS).
"The PADS research group at Georgia Tech has developed extensions and
enhancements to the ns simulator to allow a network simulation to be run
in a parallel and distributed fashion, on a network of workstations."
Last supported for ns-2.27 (Januayr 2004).
Dynamic Network Emulation Backplane Project.
"The backplane enables the user/modeler to bring multiple network
simulators together and harness their models in a single
experiment... The backplane also supports incorporation of actual
network applications into the
execution, to execute over the emulated network."
"In GloMoSim we are building a scalable simulation environment for
wireless and wired network systems. It is being designed using the
parallel discrete-event simulation capability provided by Parsec."
QualNet is a commercial simulator that grew out of
SSF (Scalable Simulation Framework).
SSF Network Models (SSFNet), with
"open-source Java models of protocols (IP, TCP, UDP, BGP4, OSPF, and
others), network elements (hosts, routers, links, LANs), and assorted
support classes for realistic multi-protocol, multi-domain Internet
modeling and simulation", and a
gallery of baseline networks
with models of large, realistic BGP topologies, heavily congested
networks, and validation models, together with model descriptions and
Dartmouth SSF (DaSSF).
"Dartmouth SSF (DaSSF) is a process-oriented, conservatively
synchronized parallel simulator, which is designed for but not
exclusively for simulating very large scale multi-protocol communication
networks. DaSSF is a C++ implementation of Scalable Simulation
"The Georgia Tech Network Simulator (GTNetS) is a full-featured network
simulation environment that allows researchers in computer networks to
study the behavior of moderate to large scale networks."
JavaSim, now renamed to
OMNET++ is free for academic and non-profit use, and contains IP,
IPv6, MPLS, mobility, and ad-hoc simulations.
M5 simulates TCP/IP performance with full-system support with
detailed I/O models and three CPU models.
"HEGONS is a HEterogeneous Grooming Optical Network Simulator that
supports mixed routing and wavelength assignment algorithms and optional
wavelength conversions capability on each node. The goal of Hegons is the
evaluation of different dynamic routing and wavelength assignment (RWA)
algorithms in WDM optical networks."
OpNet Modeler is a leading commercial network simulator, including a
"library of detailed protocol and application models including
Multi-Tier Applications, Voice, HTTP, TCP, IP, OSPF, BGP,
EIGRP, RIP, RSVP, Frame Relay, FDDI, Ethernet, ATM, 802.11 Wireless
LANs, MPLS, PNNI, DOCSIS, UMTS, IP Multicast, Circuit Switch and many
more... The Standard Model Library includes hundreds of vendor specific
and generic device models including routers, switches, workstations,
and packet generators".
IP network emulator software to generate impairments over IP
is a high-fidelity network simulator based on GloMoSim. It
uses a parallel simulation engine to run large wireless and
Other commercial simulators:
(including a network simulator);
Shunra (for performance testing for
a scalable network simulation tool based on patented mathematical
developments, from a start-up company stemming from INRIA.
NetSim is a commercial network simulator for use at the undergraduate level,
mostly at use in India.
Emulation, and simulation/emulation/experiment transitions:
is based on Emulab.
"Netbed strives to preserve the control and ease of use of simulation,
without sacrificing the realism of emulation and live network
is a network emulator built on the parallel engine of QualNet.
EXata supports hardware in the loop (HWIL) and human in the loop (HITL)
interfaces to interoperate the emulated network with real devices.
A variant, EXata/Cyber, provides network security and cyber warfare
features like RF jamming, DDoS, eavesdropping and intrusion detection
software (snort) related capabilities.
Wisconsin Advanced Internet Laboratory (WAIL)
"offers Emulab/Netbed capability ... plus the
ability to incorporate topologies of a large number of Cisco routers
into Emulab experiments".
"nsclick is the Click Modular Router embedded inside of the ns-2 network
simulator. With minor modifications, a Click routing graph may run both
on an actual system as well as under ns-2."
Network Emulation with the NS Simulator
"Special objects within the simulator are capable of introducing live
traffic into the simulator and injecting traffic from the simulator into
the live network."
Network Simulation Cradle for ns-2,
from the WAND Network Research Group.
"The Network Simulation Cradle (NSC) is a framework which allows real
world TCP/IP network stacks to be used inside a network simulator."
can be used to introduce queue and bandwidth limitations, delays, packet losses,
and multipath effects.
"A tool for scalable network path emulation." ...
"The significant strengths of NetPath over tools such as Dummynet and
NIST Net is its ability
to scale to accommodate heavy loads, its ability to scale to high speeds,
and its delay accuracy over a wide
range of operating conditions."
Modelnet from Duke is an emulation environment for evaluating
distributed services such as caching, network content distribution, and
IMUNES is a network emulation framework based on FreeBSD.
- Washington University's
Open Network Lab is a system with high performance routers that
allows users to run experiments remotely.
Commercial network emulation products include
Thanks to Wesley Eddy and Morley Mao for proposed additions to the page.
This material is based upon work supported by the National Science
Foundation under Grant No. 0230921.
Any opinions, findings, and conclusions or recommendations expressed
in this material are those of the author(s) and do not necessarily
reflect the views of the National Science Foundation.
Last modified: September 2010.
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