How to Implement on CCNA Protocols in NS2

To implement the CCNA (Cisco Certified Network Associate) protocols within NS2 (Network Simulator 2) has needs to comprises mimicking the fundamental networking protocols and technologies are normally roofed in the CCNA certification, like routing protocols such as RIP, OSPF, EIGRP, switching protocols are STP, VLANs, and basic TCP/IP set ups.

The simulation tool NS2 doesn’t have built-in support for several of the particular CCNA protocols such as OSPF or EIGRP. But, we can replicate the simple setups with protocols like RIP, static routing, and several switching concepts. Let us handle your performance analysis! We deliver outstanding results for CCNA Protocols implemented in NS2.

The following procedure is supports on how we can approach this protocol in ns2:

Step-by-Step Implementation:

Step 1: Set Up NS2

Make sure that NS2 is installed on the computer. We can download it from the NS2 webpage and follow the installation instructions. Check the installation by running a simple simulation

Step 2: Implement Basic Routing Protocols

Example: Implementing RIP in NS2

Create a New Tcl Script: Open a text editor and make a new file, for specimen, tcl.

Set up the Simulation Environment: Describe the simulator, set up the network topology, and configure the metrics particular to the simulation.

# Create a simulator object

set ns [new Simulator]

# Define options for the simulation

set val(chan) Channel/WirelessChannel ;# Channel type

set val(prop) Propagation/TwoRayGround ;# Propagation model

set val(netif) Phy/WirelessPhy ;# Network interface type

set val(mac) Mac/802_11 ;# MAC type

set val(ifq) Queue/DropTail/PriQueue ;# Interface Queue type

set val(ll) LL ;# Link layer type

set val(ant) Antenna/OmniAntenna ;# Antenna type

set val(ifqlen) 50 ;# Max packet in ifq

set val(nn) 4 ;# Number of nodes

set val(rp) RIP ;# Routing Protocol

set val(x) 500 ;# X dimension of topography

set val(y) 500 ;# Y dimension of topography

set val(stop) 10.0 ;# Simulation time

# Initialize the topology object

set topo [new Topography]

$topo load_flatgrid $val(x) $val(y)

# Create the God object

create-god $val(nn)

# Configure the nodes

$ns node-config -llType $val(ll) \

-macType $val(mac) \

-ifqType $val(ifq) \

-ifqLen $val(ifqlen) \

-antType $val(ant) \

-propType $val(prop) \

-phyType $val(netif) \

-channelType $val(chan) \

-topoInstance $topo \

-agentTrace ON \

-routerTrace ON \

-macTrace ON \

-movementTrace ON \

-adhocRouting $val(rp)

# Create nodes

for {set i 0} {$i < $val(nn)} {incr i} {

set node_($i) [$ns node]

$node_($i) random-motion 0

}

# Define node positions

$node_(0) set X_ 100.0; $node_(0) set Y_ 100.0

$node_(1) set X_ 300.0; $node_(1) set Y_ 100.0

$node_(2) set X_ 500.0; $node_(2) set Y_ 100.0

$node_(3) set X_ 300.0; $node_(3) set Y_ 300.0

# Setup links

$ns duplex-link $node_(0) $node_(1) 1Mb 10ms DropTail

$ns duplex-link $node_(1) $node_(2) 1Mb 10ms DropTail

$ns duplex-link $node_(1) $node_(3) 1Mb 10ms DropTail

# Setup traffic sources

set udp [new Agent/UDP]

$ns attach-agent $node_(0) $udp

set null [new Agent/Null]

$ns attach-agent $node_(2) $null

$ns connect $udp $null

set cbr [new Application/Traffic/CBR]

$cbr attach-agent $udp

$cbr set packetSize_ 512

$cbr set interval_ 0.1

$cbr start

# Setup simulation end

$ns at $val(stop) “stop”

$ns at $val(stop) “$ns nam-end-wireless $val(stop)”

$ns at $val(stop) “exit 0”

proc stop {} {

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

}

# Run the simulation

$ns run

Step 3: Run the Simulation

We can save the Tcl script like ccna_rip_example.tcl.
Open a terminal and navigate to the directory in which we can be saved the Tcl script.
Run the simulation using the given command:

ns ccna_rip_example.tcl

The above command will make trace files and optionally a network animation file if permitted in the script.

Step 4: Analyse the Results

We can use the trace files and the network animator (NAM) to estimate the performance of the replicated CCNA protocol, concentrating on parameters like packet delivery ratio, latency, and routing behaviour.

Step 5: Visualize the Results (Optional)

If we have to permit the network animator (NAM) in the script, we can visualize the simulation:

nam ccna_rip_example.nam

It will open the NAM window in which we can observe the network topology and the performance of the RIP protocol when the simulation.

Extending to Other CCNA Protocols

If we need to mimic more furthered protocols such as OSPF or EIGRP:

OSPF: We could want to execute or use an external module for OSPF that is not natively supported in NS2.
EIGRP: EIGRP is a Cisco proprietary protocol, and we would want a custom execution or another simulator such as GNS3 or Cisco Packet Tracer for exact simulation.

Additional Considerations

Static Routing: We can mimic simple static routing manually set up routes.
VLANs and STP: Whereas NS2 is not designed for the layer-2 simulation such as VLANs and STP and we can mimic the simple switching behaviour with static routing or by using further specialized network simulators.
TCP/IP Configuration: Executing several TCP/IP configurations and analysis how protocols such as RIP respond to various network conditions.

Here, you can find additional information on CCNA protocols that were implemented and analysed using the straightforward process in the simulation ns2. More informations will be provided based on your needs.