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TCL script to run a simple simulation using NS2 and NAM
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#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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how do we do for 25 nodes in 400X400 dimensions?