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How to Implement Point to Point Topology in OMNeT++

To implement a point-to-point (P2P) topology in OMNeT++ has needs to generate a network where nodes are connected directly to one another through an enthusiastic link and it is one of the simple network topologies that usually used to interconnect two devices directly without any intermediary devices such as routers or switches. The given below are the detailed procedures on how to simulate the point-to-point topology in OMNeT++ using the INET framework.

Step-by-Step Implementation:

  1. Set up OMNeT++ and INET Framework
  • Make sure that OMNeT++ and the INET framework are installed and correctly configured. The INET framework delivers the essential modules for emulating the point-to-point connections.
  1. Define the Point-to-Point Topology in a NED File
  • Generate a .ned file to describe the network topology. In a point-to-point topology, two nodes are directly connected by a point-to-point link.

Example:

package pointToPointExample;

import inet.node.inet.StandardHost;

import inet.linklayer.ppp.Ppp;

network PointToPointTopology

{

submodules:

nodeA: StandardHost {

parameters:

@display(“p=200,200”);

}

nodeB: StandardHost {

parameters:

@display(“p=400,200”);

}

connections allowunconnected:

nodeA.pppg++ <–> Ppp <–> nodeB.pppg++;

}

  • In this example:
    • StandardHost is used to denote the two nodes in the network, nodeA and nodeB.
    • The Ppp (Point-to-Point Protocol) connection is used to directly link nodeA to nodeB.
  1. Configure the Nodes in OMNeT++ INI File
  • In the omnetpp.ini file, configure the properties of the nodes like IP addresses and the applications they will run.

Example:

network = pointToPointExample.PointToPointTopology

# Configure IP addresses

*.nodeA.ipv4.arp.typename = “GlobalArp”

*.nodeA.ppp[0].ipv4.address = “10.0.0.1”

*.nodeA.ppp[0].ipv4.netmask = “255.255.255.0”

*.nodeB.ipv4.arp.typename = “GlobalArp”

*.nodeB.ppp[0].ipv4.address = “10.0.0.2”

*.nodeB.ppp[0].ipv4.netmask = “255.255.255.0”

# Example application setup: nodeA sends data to nodeB

*.nodeA.numApps = 1

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

*.nodeA.app[0].destAddresses = “10.0.0.2”

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

*.nodeA.app[0].messageLength = 1024B

*.nodeA.app[0].sendInterval = 1s

*.nodeB.numApps = 1

*.nodeB.app[0].typename = “UdpSink”

*.nodeB.app[0].localPort = 5000

  • In this example:
    • nodeA is configured to send UDP packets to nodeB.
    • nodeB is configured to receive and process the packets.
  1. Run the Simulation
  • After setting up the network topology and configuration compile and run the simulation in OMNeT++. We should see nodeA and nodeB directly connected, with data flowing among them.
  1. Analyze the Results
  • Use OMNeT++’s built-in tools to visualize and evaluate the network traffic. Investigate how data is transmitted over the point-to-point link, latency, and packet delivery.
  1. Enhancements and Variations
  • Multiple Point-to-Point Links: Add more nodes and connect them through multiple point-to-point links to generate a more complex topology.
  • Bidirectional Communication: Set up bidirectional communication where both nodes send and receive data.
  • Performance Analysis: Evaluate the performance of the network in terms of throughput, latency, and packet loss under diverse traffic conditions.

Example Files

  1. PointToPointTopology.ned: Describes the point-to-point topology.
  2. omnetpp.ini: Contains configuration settings for the simulation.

Finally, we have seen the basic implementation process how the point-to-point topology will connect directly through another one with the link that will be executed using the OMNeT++ tool. We plan to intend the valuable insights how the point-to-point topology will perform and executed in diverse scenarios.

You can find the implementation of Point to Point Topology in OMNeT++ at omnet-manual.com. We offer top-notch simulation results and give you clear explanations for your projects.

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