#Create a simulator object
set ns [new Simulator]
 
#Define different colors for data flows (for NAM)
$ns color 1 Blue
$ns color 2 Red
 
#Open the NAM trace file
set nf [open out.nam w]
$ns namtrace-all $nf
 
#Define a 'finish' procedure
proc finish {} {
        global ns nf
        $ns flush-trace
        #Close the NAM trace file
        close $nf
        #Execute NAM on the trace file
        exec nam out.nam &
        exit 0
}
 
#Create four nodes
set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]
 
#Create links between the nodes
$ns duplex-link $n0 $n2 2Mb 10ms DropTail
$ns duplex-link $n1 $n2 2Mb 10ms DropTail
$ns duplex-link $n2 $n3 1.7Mb 20ms DropTail
 
#Set Queue Size of link (n2-n3) to 10
$ns queue-limit $n2 $n3 10
 
#Give node position (for NAM)
$ns duplex-link-op $n0 $n2 orient right-down
$ns duplex-link-op $n1 $n2 orient right-up
$ns duplex-link-op $n2 $n3 orient right
 
#Monitor the queue for link (n2-n3). (for NAM)
$ns duplex-link-op $n2 $n3 queuePos 0.5
 
 
#Setup a TCP connection
set tcp [new Agent/TCP]
$tcp set class_ 2
$ns attach-agent $n0 $tcp
set sink [new Agent/TCPSink]
$ns attach-agent $n3 $sink
$ns connect $tcp $sink
$tcp set fid_ 1
 
#Setup a FTP over TCP connection
set ftp [new Application/FTP]
$ftp attach-agent $tcp
$ftp set type_ FTP
 
 
#Setup a UDP connection
set udp [new Agent/UDP]
$ns attach-agent $n1 $udp
set null [new Agent/Null]
$ns attach-agent $n3 $null
$ns connect $udp $null
$udp set fid_ 2
 
#Setup a CBR over UDP connection
set cbr [new Application/Traffic/CBR]
$cbr attach-agent $udp
$cbr set type_ CBR
$cbr set packet_size_ 1000
$cbr set rate_ 1mb
$cbr set random_ false
 
 
#Schedule events for the CBR and FTP agents
$ns at 0.1 "$cbr start"
$ns at 1.0 "$ftp start"
$ns at 4.0 "$ftp stop"
$ns at 4.5 "$cbr stop"
 
#Detach tcp and sink agents (not really necessary)
$ns at 4.5 "$ns detach-agent $n0 $tcp ; $ns detach-agent $n3 $sink"
 
#Call the finish procedure after 5 seconds of simulation time
$ns at 5.0 "finish"
 
#Print CBR packet size and interval
puts "CBR packet size = [$cbr set packet_size_]"
puts "CBR interval = [$cbr set interval_]"
 
#Run the simulation
$ns run
 
 

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