How to Implement Wide Area Networks in OMNeT++

To implement the wide area networks (WAN) in OMNet++ has needs to encompass to generate the network that distances the larger geographical areas that commonly interrelated with numerous local area networks (LANs) or metropolitan area networks (MANs). The given below is the detailed procedures on how to implement the wide area network in OMNet++.

Step-by-Step Procedures:

1. Set up OMNeT++ and INET Framework

1. Install OMNeT++:
   • Download and install OMNeT++ .
   • Based on the operating system install the OMNet++ version.
2. Install INET Framework:
   • Download and install the INET framework, which offers models for network protocols and devices.
   • Unzip the INET framework into the OMNeT++ workspace.
   • Open OMNeT++ IDE, import the INET project, and build it.

2. Design the WAN Architecture

1. Define the Network Structure:
   • Detect the mechanisms of your WAN, like core routers, edge routers, switches, and numerous end-user devices like servers, PCs.
   • Regulate the communication protocols and data flow among these modules.
2. Create the Network Nodes:
   • Extend existing INET nodes or generate new ones for particular components like core routers, edge routers.
   • Describe the parameters and properties of these nodes such as processing capabilities, communication interfaces.

3. Develop the Simulation Modules

1. Core Router Module:
   • Generate a new module or extend an existing one for core routers.
   • Execute functionalities like routing, packet forwarding, and managing the high data throughput.
2. Edge Router Module:
   • Describe a module to denotes edge routers that interconnected local networks to the core WAN.
   • To apply functionalities like data aggregation, routing, and communication with core routers.
3. Switch Module:
   • Generate or extend a module for switches that handles data flow inside the local areas of the WAN.
   • To execute functionalities like packet switching, VLAN management, and QoS.
4. End-User Device Module:
   • Describe modules for end-user devices like PCs, servers, and IoT devices.
   • Execute functionalities like data generation, local processing, and communication with edge routers.

4. Implement Communication Protocols

1. Define Communication Interfaces:
   • State the interfaces for communication among core routers, edge routers, switches, and end-user devices.
   • To execute data exchange mechanisms using INET’s message-passing system.
2. Simulate Network Traffic:
   • Generate traffic generators to emulate the data transmission and reception among numerous components of the WAN.
   • To execute the techniques for data routing, load balancing, and error handling.

5. Configure the Simulation

1. Network Configuration File (NED):
   • Compose NED files to describe the network topology and configuration.
   • In the network, to specify the types and connection of the nodes.
2. Simulation Configuration File (INI):
   • Generate the INET files that particularly emulate the performance metrics like simulation time, node properties, traffic generation rates, and logging options.
   • Organize numerous scenarios to assess the performance of the WAN implementation.

6. Run and Analyse the Simulation

1. Run the Simulation:
   • Custom the OMNeT++ IDE to compile and execute the simulation.
   • Observer the emulation for any errors or unexpected actions.
2. Collect and Analyze Results:
   • Usage OMNeT++’s built-in analysis tools to gather the emulation.
   • Examine performance metrics like data rate, latency, packet loss, routing efficiency, and network scalability to measure the performance of the WAN implementation.

Example Code Snippets

Here, we provide the sample snippets of what the configuration files will look like:

NED File (WANetwork.ned)

package wanetwork;

import inet.node.inet.Router;

import inet.node.inet.StandardHost;

import inet.node.ethernet.EtherSwitch;

network WANetwork {

parameters:

int numCoreRouters = default(3);

int numEdgeRouters = default(6);

int numSwitches = default(10);

int numEndDevices = default(30);

submodules:

coreRouter[numCoreRouters]: Router {

@display(“p=200,200;i=device/router”);

}

edgeRouter[numEdgeRouters]: Router {

@display(“p=400,400;i=device/router”);

}

switch[numSwitches]: EtherSwitch {

@display(“p=600,600;i=device/switch”);

}

endDevice[numEndDevices]: StandardHost {

@display(“p=800,800;i=device/laptop”);

}

connections:

// Connect core routers

for i=0..numCoreRouters-2 {

coreRouter[i].pppg++ <–> coreRouter[i+1].pppg++;

}

coreRouter[numCoreRouters-1].pppg++ <–> coreRouter[0].pppg++;

 

// Connect edge routers to core routers

for i=0..numEdgeRouters-1 {

edgeRouter[i].pppg++ <–> coreRouter[i % numCoreRouters].pppg++;

}

// Connect switches to edge routers

for i=0..numSwitches-1 {

switch[i].pppg++ <–> edgeRouter[i % numEdgeRouters].pppg++;

}

// Connect end devices to switches

for i=0..numEndDevices-1 {

endDevice[i].ethg++ <–> switch[i % numSwitches].ethg++;

}

}

INI File (omnetpp.ini)

network = wanetwork.WANetwork

sim-time-limit = 1000s

*.coreRouter*.ppp[*].bitrate = 10Gbps

*.edgeRouter*.ppp[*].bitrate = 1Gbps

*.switch*.eth[*].bitrate = 1Gbps

*.endDevice*.eth[0].bitrate = 100Mbps

*.endDevice*.numApps = 1

*.endDevice*.app[0].typename = “UdpBasicApp”

*.endDevice*.app[0].destAddresses = “endDevice[*]”

*.endDevice*.app[0].destPort = 5000

*.endDevice*.app[0].messageLength = 1000B

*.endDevice*.app[0].sendInterval = exponential(1s)

Here, we clearly see the comprehensive procedures to how to evaluate the larger geographical area that interconnected with LAN and MAN using OMNet++. We will plan to share more information regarding the wide area network.

We specialize in local area networks (LANs) and metropolitan area networks (MANs). Share your project details with us, and we will provide you with simulation results and guidance. Additionally, we offer implementation of Wide Area Networks using the OMNeT++ tool.