How to Implement IEEE 802.3 Ethernet in ns2

To implement the IEEE 802.3 Ethernet within the NS2 (Network Simulator 2) has several steps that has includes mimicking a wired network in which the nodes are communicate using the Ethernet protocol. The simulation tool NS2 can simulate numerous network protocols, with the Ethernet, by using these built-in capabilities. We provided the step-by-step guide to implement it.

Step-by-Step Implementation:

  1. Set Up Your NS2 Environment:
  • Make certain that NS2 is installed on the computer.
  • We should also have the NAM (Network Animator) installed that helps to visualize the network.
  1. Basic TCL Script Structure:
  • The simulation script will contain the making nodes, setting up wired links among them, and setting up the 802.3 MAC/PHY layers.
  1. Create the Wired Network:
  • Initially, we describing the simulator object and making the nodes that will perform as Ethernet devices.

# Define the simulator

set ns [new Simulator]

# Create a trace file

set tracefile [open out.tr w]

$ns trace-all $tracefile

# Create a NAM file for animation

set namfile [open out.nam w]

$ns namtrace-all $namfile

# Create the nodes

set n0 [$ns node]

set n1 [$ns node]

set n2 [$ns node]

set n3 [$ns node]

  1. Set Up the Wired Links (Ethernet):
  • State the links among the nodes, stipulating the bandwidth, delay, and queue type and this mimics Ethernet connections.

# Create wired links between nodes

$ns duplex-link $n0 $n1 10Mb 10ms DropTail

$ns duplex-link $n1 $n2 10Mb 10ms DropTail

$ns duplex-link $n2 $n3 10Mb 10ms DropTail

  1. Configure Traffic Sources and Sinks:
  • We can use the TCP or UDP agents to mimic communication among the nodes. We can use applications such as FTP or CBR (Constant Bit Rate) to produce traffic.

# Create a TCP agent and attach it to node n0

set tcp0 [new Agent/TCP]

$ns attach-agent $n0 $tcp0

# Create a TCPSink agent and attach it to node n3

set sink0 [new Agent/TCPSink]

$ns attach-agent $n3 $sink0

# Connect the TCP agent with the TCPSink agent

$ns connect $tcp0 $sink0

# Create an FTP application and attach it to the TCP agent

set ftp0 [new Application/FTP]

$ftp0 attach-agent $tcp0

# Start the FTP transfer at 0.1 seconds

$ns at 0.1 “$ftp0 start”

  1. Run the Simulation:
  • Describe when the simulation should terminate and execute it.

# Define the finish procedure

proc finish {} {

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

exec nam out.nam &

exit 0

}

# Schedule the finish procedure at 5 seconds

$ns at 5.0 “finish”

# Run the simulation

$ns run

  1. Analyse Results:
  • We can use the generated trace file (out.tr) to estimate the packet delivery, latency, throughput, etc.
  • Use the NAM file (out.nam) to visualize the network operation.
  1. Customize and Extend:
  • We can change and expand the script by altering performance metrics such as packet size, traffic patterns, queue types, and more to mimic the various Ethernet scenarios.
  • We can also launch more nodes and links to make a more complex network topology.

The IEEE 802.3 Ethernet was clarified using the specified approach that helps to how to implement the protocols and analyse the outcomes in the simulation tool ns2. More specifies will be provided as per your requests. We customize the implementation of IEEE 802.3 Ethernet in ns2 to fit your needs, providing top-notch project guidance just for you.