How to Run RED.H Packages in Ns2

How to Install RED.H Packages in Ns2

To import RED.H packages in the Ns2 tool, follow the steps below. The RED (Random Early Detection) algorithm helps control congestion in network queues. The red.h file includes important information about how the RED queue management works. This header file sets up the rules and methods for spotting network congestion early and dropping packets randomly before the queue gets too full. This way, RED helps avoid global synchronization and keeps traffic flowing smoothly. Some key features in red.h are setting limits for the shortest and longest queue lengths, calculating average queue sizes, and figuring out how likely it is for packets to be dropped. These features are crucial for RED to work well in reducing congestion while ensuring fair use of bandwidth. In the TCL file, the functions and settings from red.h can be accessed indirectly. Users can use TCL commands to change how RED works by adjusting the minimum and maximum thresholds, turning RED on for certain links, and simulating congestion situations, all without needing to deal with the C++ code directly.

PRE-REQUISITES:

Fresh installation of Ubuntu 16.04 LTS:

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2.NS-2.35 Installation:

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Here, Percentage (%) symbol Denotes the successful installation of the NS 2.35.

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HEADER FILE VERIFICATION:

Locate to the ns-2.35 folder:

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2.Create the Main.tcl file in the scratch folder:

Next we need to create the Main.tcl file by using text editor in the ns-2.35 folder.

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Next we need to paste the below code to the Main.tcl file and save the file in the ns-2.35 folder.

Code:

set ns [new Simulator]

set tracefile [open out.tr w]

set namfile [open out.nam w]

$ns trace-all $tracefile

$ns namtrace-all $namfile

proc finish {} {

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

exec nam out.nam &

exit 0

}

set n0 [$ns node]

set n1 [$ns node]

$ns color 0 violet

# Create a duplex link between the nodes with RED queue management

$ns duplex-link $n0 $n1 1Mb 10ms RED

# Set RED parameters

set red_queue [[$ns link $n0 $n1] queue]

$red_queue set thresh_ 5

$red_queue set maxthresh_ 15

$red_queue set q_weight_ 0.002

$red_queue set limit_ 50

set tcp [new Agent/TCP]

$ns attach-agent $n0 $tcp

set sink [new Agent/TCPSink]

$ns attach-agent $n1 $sink

$ns connect $tcp $sink

set ftp [new Application/FTP]

$ftp attach-agent $tcp

$ns at 0.5 “$ftp start”

$ns at 4.5 “$ftp stop”

$ns at 5.0 “finish”

$ns run

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3.Open the Terminal:

Next, we need to launch the terminal by right clicking the mouse in the ns-2.35 location.

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4.NS-2.35 Configuration && Building Process:

Next, we need to configure and build the ns-2.35 folder to make the Created files need to work in ns-2.35 configuration.

Command: “./make”

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Here, NS-2.35 Building process completed successfully.

5.Importing Red.h:

Here we imported the Red.h header file code indirectly accessed the Red class used in the Tcl script that we had highlighted lines that creates a bidirectional (duplex) link between nodes $n0 and $n1 with a bandwidth of 1 Mbps and a delay of 10 ms by using Red Queue Management Algorithm in this network example program. Here we highlighted the code line that highlighted which is internally accessed Red.h, we will show class file that used in this code via Queue folder.

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Here we will show the header file by opening Red.h file to show the class or function imported from the Red.h in the example code. This Tcl Script Line creates a bidirectional (duplex) link between nodes $n0 and $n1 with a bandwidth of 1 Mbps and a delay of 10 ms by using Red Queue Management Algorithm in this network example program.

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6.Executing the Example Program for Red Header:

Then we need to run the Example program for Red Header to view output of the program.

Command: “./ns Main.tcl”

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Here we shown the output of the example program by using Red.h.

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In the NS 2.35 Simulation Example Program, the Red.h Header file is successfully imported. We will provide you with customized solutions and interesting research ideas that will catch the readers’ attention.

We have all the essential tools and resources to assist you at the right moment. Access tailored research services at ns2projects.com. We provide comprehensive guidance on implementing RED.H PACKAGES in your projects. Send us a message for further assistance.