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Setting Link Parameters - (BCA / B.Tech)

Setting Link Parameters in Hindi | Setting Link Parameters in Hindi:

Setting link parameters in wired networks directly affects network performance. Using simulators like NS2, we can study the impact of various parameters and optimize the network. This process plays an important role in network design and
traffic engineering.

Setting link parameters in wired networks is extremely important for network performance and reliability. Link parameters typically include features like bandwidth, latency, and packet loss rate. To effectively manage these parameters,
various tools and simulators are available, one of the main ones being Network Simulator 2 (NS2).

Introduction to Network Simulator 2 (NS2):

NS2 is an open-source simulator used for simulating network protocols and topologies. It helps researchers and network engineers to study network behavior and evaluate the performance of various protocols.

Steps to set link parameters in NS2:

The following steps are followed to set the link parameters of a wired network in NS2:

Simulator Initialization: First, start the NS2 simulator and load the necessary libraries.

set ns [new Simulator]

Node Creation: Define the nodes included in the network (such as computers or routers).

set n0 [$ns node]
set n1 [$ns node]

Link Creation and Parameter Setting: Establish a link between the nodes and set its bandwidth, latency, and queuing mechanism.

$ns duplex-link $n0 $n1 1Mb 10ms DropTail
Here, 1Mb represents the bandwidth, 10ms the latency, and DropTail the queuing mechanism.

Selection of Queuing Mechanism: Define the queuing mechanism on the link, such as DropTail, RED (Random Early Detection), etc.
$ns queue-limit $n0 $n1 10

This command sets the queuing mechanism on the link between $n0 and $n1.

Simulation Operation: After all the settings, run the simulation and analyze the results.

$ns run

Example: Suppose we want to establish a link between two nodes, with a bandwidth of 10 Mbps, latency of 5 ms, and a RED queuing mechanism. The following script can be used for this:

set ns [new Simulator]

# Node creation

set n0 [$ns node]

set n1 [$ns node]

# Link creation and parameter setting

$ns duplex-link $n0 $n1 10Mb 5ms RED

# Selection of queuing mechanism

$ns queue-limit $n0 $n1 20

# Simulation operation

$ns run

In this script, we have established a link between $n0 and $n1 with a bandwidth of 10 Mbps, a latency of 5 ms, and a RED queuing mechanism.
To set the queuing mechanism to RED, we have used the command $ns queue-limit $n0 $n1 20,
where 20 represents the queuing limit.

Setting Link Parameters

Setting Link Parameters in Hindi | Setting Link Parameters in Hindi:

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