Description:
This network consists of 8 nodes (Client1, Client2, Client3, Router1, Router2 Router3, Router4, Endserver1,). The duplex links between Client1,Client2,Client3 and Router1 have 2 Mbps of bandwidth and 100 ms of delay. The duplex link between Router1 and Router2 has 200Mbps of bandwidth and 100 ms of delay. The duplex link between Router2 and Router3 has 200Mbps of bandwidth and 100 ms of delay. The duplex link between Router3 and Router4 has 200Mbps of bandwidth and 100 ms of delay. The duplex link between Router4 and Endserver1 has 200Mbps of bandwidth and 100 ms of delay. Each node uses a DropTail queue, of which the maximum size is 100.
File name: “tcp3.tcl”
#-------Event scheduler object creation--------#
set ns [new Simulator ]
#----------creating nam objects----------------#
set nf [open tcp3.nam w]
$ns namtrace-all $nf
#open the trace file
set nt [open tcp3.tr w]
$ns trace-all $nt
set proto rlm
$ns color 51 blue
$ns color 52 yellow
$ns color 53 red
#----- creating client- router- end server node---------#
set Client1 [$ns node]
set Client2 [$ns node]
set Client3 [$ns node]
set Router1 [$ns node]
set Router2 [$ns node]
set Router3 [$ns node]
set Router4 [$ns node]
set Endserver1 [$ns node]
#set Endserver2 [$ns node]
#---creating duplex link---------#
$ns duplex-link $Client1 $Router1 2Mb 100ms DropTail
$ns duplex-link $Client2 $Router1 2Mb 100ms DropTail
$ns duplex-link $Client3 $Router1 2Mb 100ms DropTail
$ns duplex-link $Router1 $Router2 100Kb 100ms DropTail
$ns duplex-link $Router2 $Router3 100Kb 100ms DropTail
$ns duplex-link $Router3 $Router4 200Kb 100ms DropTail
$ns duplex-link $Router4 $Endserver1 200Kb 100ms DropTail
#$ns duplex-link $Router4 $Endserver2 200Kb 100ms DropTail
#----------------creating orientation--------------------#
$ns duplex-link-op $Client1 $Router1 orient down-right
$ns duplex-link-op $Client2 $Router1 orient right
$ns duplex-link-op $Client3 $Router1 orient up-right
$ns duplex-link-op $Router1 $Router2 orient up-right
$ns duplex-link-op $Router2 $Router3 orient down-right
$ns duplex-link-op $Router3 $Router4 orient right
$ns duplex-link-op $Router4 $Endserver1 orient up
#------------Labeling----------------#
$ns at 0.0 "$Client1 label Client1"
$ns at 0.0 "$Client2 label Client2"
$ns at 0.0 "$Client3 label Client3"
$ns at 0.0 "$Router1 label Router1"
$ns at 0.0 "$Router2 label Router2"
$ns at 0.0 "$Router3 label Router3"
$ns at 0.0 "$Router4 label Router4"
$ns at 0.0 "$Endserver1 label Endserver1"
#-----------Configuring nodes------------#
#$Endserver1 shape hexagon
#$Router1 shape square
#$Router2 shape square
#$Router3 Shape square
#$Router4 Shape square
#----------------Establishing queues---------#
$ns duplex-link-op $Client1 $Router1 queuePos 0.1
$ns duplex-link-op $Client2 $Router1 queuePos 0.1
$ns duplex-link-op $Client3 $Router1 queuePos 0.5
$ns duplex-link-op $Router1 $Router2 queuePos 0.1
$ns duplex-link-op $Router2 $Router3 queuePos 0.5
$ns duplex-link-op $Router3 $Router4 queuePos 0.1
$ns duplex-link-op $Router4 $Endserver1 queuePos 0.5
#---------finish procedure--------#
proc finish {} {
global ns nf nt
puts "running nam..."
exec nam tcp3.nam &
exit 0
}
#Calling finish procedure
$ns at 35.0 "finish"
$ns run
#-----How to run-------------#
$ns tcp3.tcl
#---------Snapshot-----------#
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