OPNET Modeler is the industry's leading environment for network modeling and simulation, allowing you to design and study communication networks, devices, protocols, and applications with unmatched flexibility and scalability. Modeler is used by the world's largest network equipment manufacturers to accelerate the R&D of network devices and technologies such as VoIP, TCP, OSPFv3, MPLS, IPv6, and more.

Key Features

Solution Architecture

System-in-the-Loop Testing & Training

Modeler is based on a series of hierarchical editors that directly parallel the structure of real networks, equipment, and protocols.

The Project Editor graphically represents the topology of a communications network. Networks consist of node and link objects, configurable via dialog boxes. Drag and drop nodes and links from the editor's object palettes to build the network, or use import and rapid object deployment features. Use the protocol menu to quickly configure protocols and activate protocol-specific views.

The Node Editor captures the architecture of a network device or system by depicting the flow of data between functional elements, called "modules". Each module can generate, send, and receive packets from other modules to perform its function within the node. Modules typically represent applications, protocol layers, algorithms, and physical resources, such as buffers, ports, and buses. Modules are assigned process models (developed in the Process Editor) to achieve any required behavior.

The Process Editor uses a powerful finite state machine (FSM) approach to support detailed specification of protocols, resources, applications, algorithms, and queuing policies. States and transitions graphically define the progression of a process in response to events. Each state of a process model contains C/C++ code, supported by an extensive library of functions designed for protocol programming. Use the Process Editor to develop entirely new process models, or use the models in OPNET's Model Library as a starting point. OPNET's process modeling framework supports full multi-threading and use of parallel computing architectures.

Modeler offers a comprehensive library of detailed protocol and application models including Multi-Tier Applications, Voice, HTTP, TCP, IPv4, BGP, EIGRP, RIP, VoIP, OSPFv3, RSVP, Frame Relay, FDDI, Ethernet, ATM, IPv6, MPLS, PNNI, DOCSIS, IP Multicast, Circuit Switch, IS-IS, and many more. All standard models are provided as FSMs with open source code. Modeler also includes an extensive vendor device model library with  hundreds of vendor specific and generic device models including routers, switches, workstations, and packet generators. Quickly assemble your own device models using the "Device Creator". Alternatively, there are multiple interfaces to automate device model creation through the import of operational data from text files, XML, and popular tools such as Cisco, HP, CA, NetScout, BMC, Concord (CA), Sniffer, Infovista, MRTG, cflowd, tcpdump, and others.

Modeler's discrete event simulation kernel is the focal point of the modeling environment. Over the years, it has been continuously enhanced to deliver faster, more efficient simulations that scale significantly with the amount of traffic in the model. Aside from raw performance, Modeler packs numerous features into the kernel to accelerate the larger, more demanding simulations. These include a 64-bit kernel for expanded memory addressing and general parallel simulation for leveraging multiple processors. Hybrid and Analytical simulations are other forms of simulation provided by Modeler, which are ideal for activities where the importance of granularity is superceded by run-time, such as routing studies and failure analysis.