Introduction about OMNeT++ SDN: Now a day, Technologies have changed our life more comfortable and safe. We are using a lot of modern technologies like smartphones, smartwatches and etc. This kind of technology needs the support of a simulator for the purpose of simulating with the network. It is mandatory to know about Simulators which are used in our day to life.

“In this article is very useful for you because of getting more details about technology of OMNeT++ simulator with SDN and this article having more important content like the contribution of SDN in OMNeT++, the topology of OMNeT++, Process of OMNeT++ simulations, and so on.”

 The OMNeT++ is defined as a tool that is useful for designing a simulation process and it is also known as the simulation process of discrete events with the structure of an object-oriented programming language. The following list represents the simulation processes that are done by OMNeT++ Simulator. There are,

  • In OMNeT++ is support for passing the message between one node to another node because of its multiple modules.
  • Designing hardware systems and Multiprocessors.
  • To evaluate the performance of various systems.
  • Design a protocol for Wireless and wired networks.
  • Hardware architecture designing.

Define SDN

           Under this topic we know about SDN is initiate the network data planes and network control separation. Which node is placed in center point in SDN controller and eliminates from the entities of a distributed system that node is said to be a Control plane. This plane is distributed again based on the physical center in the SDN controller for providing performance and resilience.

This is a basic concept of SDN and its control planes. Our experts have highly trained in SDN projects and other projects also. Then we will move on to the next topic that is the Contribution of OMNeT++ SDN.

What is the contribution of OMNeT++ with SDN?

           In OMNeT++ frameworks, evaluating the architecture of SDN controller if fully efficient for implementing the simulation models which is flexible for any other work is a big support for OMNeT++.

  • Additionally, for the separate controllers we analyze traffics in the architecture of distributed controllers by providing a suitable framework for evaluating the capability of controllers.

Why did we choose OMNeT++?

Some reasons for choosing an OMNeT++ are listed. There are,

  • OMNeT++ gives full support to the network.
  • SMPL is not extensible and not modular also.
  • Object-oriented-based simulation design is best for writing a simulation process.

The above lists are some basic reasons for choosing the OMNeT++ framework. The upcoming topics are insisted on the basic things of OMNeT++ SDN like topologies, how we run the OMNeT++ simulation, algorithms, and requirements. Let us see one by one in the below section.

Creation of OMNeT++ topology

           If we create a new topology is mainly contained.NED files in OMNeT++ simulation provide a topology as we want. These kinds of.NED files are more helpful for some modules. There are,

  • Physical properties of the node.
  • Design the module.
  • A number of gates in the node.

How we run OMNeT++ simulation

  • OMNeT++ have separate files for initialization with the extension of .ini
  • These initialization files have more parameters.
  • This file gives permission for starting the simulation process.

Designing an algorithm

  • For designing an algorithm OMNeT++ has separate modules.
  • This module is defined by the collection of .h files. The. , .cc file, .NED file.
  • And. cc and And.h files are used for the purpose of building our own protocols and own algorithms.
  • Then to design a node is physical property done by use of NED.

Basic requirements of OMNeT++

  • BLT(version 2.4z)
  • Linux installation for example RedHat 8.0.
  • OMNeT++(version 3.3)
  • Tcl/Tk(version 8.4.14)

These are some basic requirements for OMNeT++. Until we will discuss the basic terminologies like topology, algorithm, and requirements then go on to the next topic that is background in OMNeT++ this topic consist more related topics like SDN and its open flow, LLDP Balanced Min Hop, LLDP Agents, debugging tools, memory management, memory optimization and more.

Omnet SDN Software Defined Networking

Background works in OMNeT++

 LLDP Agents: LLDP is abbreviated from Link Layer Discovery Protocol it’s used for creating the map structure for the network topology after the processes done by SDN controllers.

LLDP Balanced Min Hop: This is a final mechanism of forwarding. BalancedMinHop Module is used for implementing an OpenFlow OMNeT++ suite and also finding the smallest path from the source to the destination along with forwarding packets

OpenFlow and SDN: In SDN controllers have OpenFlow models that are mainly used for free flow between compound modules of the controller.

  • The OMNeT++ suites provide the LLDP message class and LLDP Agent controller to the functionalities of OpenFlow.
  • Sometimes the real-world structures can be reflected by the LLDP messages then agent modules of LLDP to provide the messages in the interval of random time.

Debugging tools: More tools are in the SDN tool but Debugging tools are most important to use. Here we will see about some different kinds of approaches and parts of the architecture of SDN.

  • Here, there are several tools that can be used to the implantation of API such as Application Programming Languages
  • This tool is widely used for analyzing the SDN more deeply and it also considers where the debug id is needed and how to build interfaces in a common manner and consequence also.
  • In the OpenFlow section under this category, it holds more tools and it also supports any version of the system and protocols. Familiar switches for SDN enable and SDN control platforms are also used in this category of tools.

Memory Optimization: we mainly see in this optimization section is CacheFlow. The main purpose CacheFlow is to provide large memory holding switches to build applications of the gives a rule for caching mechanism to define a hybrid witch of software-hardware.

  • This caching mechanism is useful for occupancy monitoring in TCAM.
  • Here, SDN has some switches for enabling. There are,
  • TABLE FULL OpenFlow
  • Another mechanism is called swapping. It’s a part of the Memory management System that is used in SDN controllers.

Memory Management: In every operating system memory management is a difficult task. So this process maintains the overall computer memory based on the coordinates and controls.

  • To solve this problem of memory management in Omnet++ SDN controllers it uses the NOSs it’s referred to as Network Operating Systems.
  • The combination of SDN controllers with computer operating systems gives an advantage of maintaining and restricting the hardware resources for example network elements.
  • In SDN applications eviction mechanism is denoted as,
  • Setting each flow of entry is important and configures it.
  • Disable/enable is done on the basis of the per table.

The above five topics are considered as a background of the OMNeT++ framework with SDN. Then the upcoming topic is sEden controller. This controller provides an API to switches for the controlling. Let us see some more points in this sedan controller and continuously discuss the features of this framework.

Define sEden Controller

  • Message: OpenFlow v1.0.0
  • Version: INET 4.0 , OMNeT++ 5.4
  • Methods: ExtInterface and Inet::RealtimeScheduler

Features of OMNeT++ with SDN

           The following list is a feature of OMNeT++ with SDN when compared to OpenFlow

  • Integrate with simulation environment(OPNET and OMNeT++)
  • Statefulness
  • Programming languages and more number of deployment options
  • Flexible definition of rules
  • Support for multitenancy
  • Support of duty cycle

So, these are the features of OMNeT++ SDN. For considering prototypes in this framework it can be classified into two parts based on nodes characteristics. That is the control plane and Sensor nodes. Let us see the requirements of each prototype.

Control plane

  • Controllers implemented Java7
  • WISE Visor + Controllers hosted in the same PC
  • Windows 7, 32 bits
  • Intel(R) Core (TM) 2 CPU, 2.40 GHz
  • 4GB of RAM.

Sensor nodes

  • Memory:
  • 10 KB of memory used for SDN-Wise
  • 8 KB RAM+256 KB Flash memory
  • 40 KB of memory is used for TIMAC v.1.4.0(MAC)
  • Embit IEEE 802.15.4 boards for EMB-Z2530PA
  • Texas Instruments CC2530
  • 2.4 GHz ISM

SDN Performance Evaluation

           By using the perfect Test-best, the architecture of distributed controllers should be able to investigate the performances of the controllers for example DOT or Mininet.

  • Neglect some details and abstraction level as high takes place when Analytical approach presented in SDN Architecture.
  • From the minimum amount of details if the simulation model is created that is another approach of this performance for example using OMNeT++ framework.
  • The testbed does not need features and characteristics of the network and also provides to allow for testbed which already existing stage.

Finally, we consider the OMNeT++ with SDN’s demo models. In this demo, three steps can be used. There are experimentation, design, and prototyping also discuss work of SDV-WISE in the Demo project.

OMNeT++ SDN project DEMO

Prototype, Design, and experiment of a stateful SDN solution for WISE

           WISE is abbreviated from Wireless Sensor network and it is stateful. Based on WISE it has two kinds of objectives. There are,

  • To enable the finite state machines and started its operations. Stateless solutions cannot accept this kind of operation for creating sensor nodes.
  • The transmission rate of information’s from sensor nodes to the Network controller is decreased.

Which prototype is must be allowed to maintain an OMNeT++ simulator for SDN controllers are called SDN-WISE prototypes. So far, we are gain knowledge about the OMNeT++ SDN. We have more number of developing and developed projects based on SDN project topics. We hope this article is very useful for gaining your knowledge.