How to Start TCP IP Projects Using NS2

To stimulate a TCP/IP project using NS2 (Network Simulator 2), follow these structured procedures:

Steps to Start TCP/IP Projects Using NS2

  1. Understand the Basics of TCP/IP in NS2
  • What is TCP/IP?
    • The TCP/IP (Transmission Control Protocol/Internet Protocol) is a vital protocol that suite for communication with the internet.
    • The NS2 offers built-in support for replicate the TCP and IP layers, it involve the several TCP variants for sample TCP Tahoe, Reno, NewReno, Vegas.
  • Why use NS2 for TCP/IP Projects?
    • Replicate for examine the network behavior below various TCP/IP setting.
    • The performances are estimate by parameter metrics such as throughput, latency, and packet loss.
    • It research by congestion control, flow control, and routing protocols.
  1. Install NS2
  • Install NS2 on Linux:

sudo apt-get update

sudo apt-get install ns2

  • Verify Installation: It process for the following command:

ns

If % appears, the installation is successful.

  1. Define Your TCP/IP Project Goals
  • Common Project Topics:
    • Associate the Performance for TCP variants for instance Tahoe vs. Reno.
    • Study for the congestion control mechanisms.
    • Replicate the TCP over wireless networks.
    • The TCP examine for the packet loss, latency, and throughput in large-scale networks.
  1. Plan Your Network Topology
  • Basic Elements:
    • Nodes: Characterize the node devices such as clients, servers, routers.
    • Links: Express the connection for bandwidth, delay, and queue management.
    • Traffic Sources: Create the source for TCP/UDP congestion for sample e.g., FTP, CBR.
  • Topology Examples:
    • Star for sample Single server communicating with multiple clients.
    • Linear for instance multiple nodes connected in a chain.
    • Complex such as Multiple routers connecting different networks.
  1. Create a Basic TCP/IP Simulation

Here’s a basic Tcl script for replicating the TCP/IP communication among their two nodes:

Example Script:

# Create a Simulator Object

set ns [new Simulator]

# Trace and NAM Files

set tracefile [open tcpip.tr w]

$ns trace-all $tracefile

set namfile [open tcpip.nam w]

$ns namtrace-all $namfile

# Create Nodes

set n0 [$ns node]

set n1 [$ns node]

# Create Link Between Nodes

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

# Set Queue Management (Optional)

$ns queue-limit $n0 $n1 50

# TCP Agent

set tcp [new Agent/TCP]

$ns attach-agent $n0 $tcp

# TCP Sink

set sink [new Agent/TCPSink]

$ns attach-agent $n1 $sink

$ns connect $tcp $sink

# FTP Application over TCP

set ftp [new Application/FTP]

$ftp attach-agent $tcp

$ftp start

# Schedule End of Simulation

proc finish {} {

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

exec nam tcpip.nam &

exit 0

}

$ns at 10.0 “finish”

# Run Simulation

$ns run

  1. Customize TCP Parameters
  • Select TCP Variants:
    • Used the TCP variants for specific through specifying the kind of agent:

set tcp [new Agent/TCP/Reno]  # Options: TCP/Reno, TCP/Tahoe, TCP/NewReno, TCP/Vegas

  • Congestion Window and Packet Size: Setting the parameters for traffic control:

$tcp set window_ 50  # Set congestion window size

$tcp set packetSize_ 1040  # Set packet size

  1. Visualize and Analyze the Results
  • Trace File Analysis:
    • The .tr file logs packet-level events like transmission, drops, and delays.
    • Use the trace file tool such as AWK or Python scripts to extract and analyze data:

grep “tcp” tcpip.tr > tcp_analysis.txt

  • Network Animation (NAM): Start the .nam file to envision for node interactions:

nam tcpip.nam

  1. Enhance the Simulation
  • Add More Nodes: Replicate the communication among the several nodes.

set n2 [$ns node]

$ns duplex-link $n1 $n2 10Mb 20ms DropTail

  • Traffic Sources: Enhance the several congestion generators for sample UDP, FTP

set udp [new Agent/UDP]

set cbr [new Application/Traffic/CBR]

$cbr attach-agent $udp

  • Routing Protocols: It contain the routing protocols such as Dijkstra, OSPF, or RIP for multi-hop environment.
  1. Experiment with Advanced TCP/IP Topics
  • Congestion Control: Validate the TCP performance below the congestion for network.
  • Fairness Analysis: Examine the bandwidth distribute between their various TCP flows.
  • Wireless TCP: Estimate the TCP behavior over wireless connection.
  • QoS (Quality of Service): Analysis the delay and throughput for below different congestion conditions.
  • Buffer Management: Execute and analyze the queue management procedures for instance RED, DropTail.
  1. Document Your Project
  • Project Report:
    • Start with the document for objectives
    • The next process for the design a topology.
    • The process are execute the replication parameters
    • Then metrices gives the outcomes for sample graphs for throughput, latency, packet loss.
    • Finally the documents are complete with this observations and Conclusion
  • Graphical Analysis: Use the graphical tool like Gnuplot, MATLAB, or Python for envision the performance parameter metrics.

From the demonstration we completely aggregate the information about the installation process and implementation procedure for TCP/IP that were deploy in the tool of ns2.For clarification on other queries a separate manual will be prepared.