How to Simulate Network IP Addressing in OMNeT++

To implement the network IP addressing in OMNeT++ has encompasses constructing nodes in a network including IP addresses so that they can interact with each other using standard network protocols. This process usually contains subnet masks, routing tables, and setting up IP addresses. Given below is an approaches how to execute basic network IP addressing in OMNeT++ using the INET framework:

Step-by-Step Implementations:

Set up OMNeT++ and INET Framework

Install OMNeT++: Make certain that OMNeT++ is installed and configured on the system.
Install INET Framework: Download and install the INET framework, which offers models for network protocols, with IP addressing and routing.

Define the Network Topology

Build a network topology with nodes like hosts and routers that will be given IP addresses. This topology could signify a simple LAN or a more difficult network with numerous subnets.

Example NED File (IPAddressingNetwork.ned):

package mynetwork;

import inet.node.inet.StandardHost;

import inet.node.inet.Router;

network IPAddressingNetwork

{

submodules:

router: Router {

@display(“p=300,200”);

}

hostA: StandardHost {

@display(“p=100,200”);

}

hostB: StandardHost {

@display(“p=500,200”);

}

connections allowunconnected:

hostA.ethg++ <–> ethernetLine <–> router.ethg++;

hostB.ethg++ <–> ethernetLine <–> router.ethg++;

}

In this example:

router: Performs as the central router that connects hosts.
hostA and hostB: Denotes two hosts in the network that require IP addresses to communicate with each other.

Assign IP Addresses to Nodes

In the network, we want to assign IP addresses to each node. It can be done by configuring the IP address, subnet mask, and gateway for each node.

Example Configuration in omnetpp.ini:

[General]

network = IPAddressingNetwork

**.hostA.ipv4.configurator.typename = “Ipv4NetworkConfigurator”

**.hostA.ipv4.configurator.config = xmldoc(“IPAddressingNetworkConfig.xml”)

**.hostB.ipv4.configurator.typename = “Ipv4NetworkConfigurator”

**.hostB.ipv4.configurator.config = xmldoc(“IPAddressingNetworkConfig.xml”)

**.router.ipv4.configurator.typename = “Ipv4NetworkConfigurator”

**.router.ipv4.configurator.config = xmldoc(“IPAddressingNetworkConfig.xml”)

Create IP Configuration File

Generate an XML file that states the IP addressing scheme, containing the IP addresses, subnet masks, and routing information.

Example IP Address Configuration File (IPAddressingNetworkConfig.xml):

<?xml version=”1.0″?>

<!– Routing Table for Host A –>

<!– Routing Table for Host B –>

</config>

In this example:

hostA is allocated the IP address 192.168.1.1.
hostB is assigned the IP address 192.168.1.2.
router is allotted the IP address 192.168.1.254 and acts as the default gateway for both hosts.

Run the Simulation

Run the simulation and display the communication among hosts using their assigned IP addresses. We can use INET’s built-in applications, like ping or UDP, to check connectivity.

Example Configuration to Run a Ping Application:

[General]

network = IPAddressingNetwork

**.hostA.numApps = 1

**.hostA.app[0].typename = “PingApp”

**.hostA.app[0].destAddr = “192.168.1.2” # Ping hostB

**.hostA.app[0].startTime = 1s

**.hostA.app[0].count = 10

**.hostB.numApps = 1

**.hostB.app[0].typename = “PingApp”

**.hostB.app[0].destAddr = “192.168.1.1” # Ping hostA

**.hostB.app[0].startTime = 2s

**.hostB.app[0].count = 10

In this configuration:

hostA runs a PingApp that transmits ICMP Echo Requests (ping) to hostB‘s IP address.
hostB runs a same PingApp that pings hostA‘s IP address.

Verify Connectivity

Check that the hosts can effectively communicate using their IP addresses, after running the simulation. We can observe the output for effective ping replies and any potential routing issues.

Extend the Network

We can expand the network to contain further hosts, routers, and subnets. Update the NED and XML configuration files accordingly to adapt the new network structure.

Example of Adding another Subnet:

<?xml version=”1.0″?>

<!– Routing Table for Host A –>

<!– Routing Table for Host B –>

<!– Routing Table for Host C –>

<!– Routing between subnets on the router –>

</config>

Throughout this page, we had provided step-by-step process and details about how to implement the Network IP Addressing using INET framework in OMNeT++. We will offer supplementary informations as per your requirements.

With the OMNeT++ tool, we will provide you with the best guidance on how to implement network IP addressing with tailored support.