Hi ns2 users,
I am a brand new user in NS2 and try to cotton up with it.
I already got a lot of knowledge, but with tiny details I get stuck
e.g. how can I color the Streams?
I'm not able to find the error
here is my code.
# new simulator / Neuer Simulator
set ns [new Simulator]
#Open the output files / öffnen neuer outputfiles
set f0 [open out0.tr w]
set f1 [open out1.tr w]
#Open file for nam tracing
set nf [open out1.nam w]
$ns namtrace-all $nf
#creating new nodes / Erzeugen von Nodes
set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]
set n4 [$ns node]
set n5 [$ns node]
$n0 color "blue"
$n1 color "green"
$n2 color "black"
$n3 color "black"
$n4 color "blue"
$n5 color "Green"
$n0 label "Audio Source"
$n1 label "PC1"
$n2 label "Switch1"
$n3 label "Switch2"
$n4 label "Audio sink"
$n5 label "PC2"
#connect the nodes / Verbinden der Nodes
$ns duplex-link $n0 $n2 100Mb 10ms DropTail
$ns duplex-link $n1 $n2 100Mb 10ms DropTail
$ns duplex-link $n3 $n2 100Mb 10ms RED
$ns duplex-link $n4 $n3 100Mb 10ms DropTail
$ns duplex-link $n5 $n3 100Mb 10ms DropTail
#arrange the nodes / Anordnung der Nodes
$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
$ns duplex-link-op $n3 $n4 orient right-up
$ns duplex-link-op $n3 $n5 orient right-down
proc record {} {
global sink4 sink5 f0 f1
#Get an instance of the simulator
set ns [Simulator instance]
#Set the time after which the procedure should be called again
set time 0.5
#How many bytes have been received by the traffic sinks?
set bw0 [$sink4 set bytes_]
set bw1 [$sink5 set bytes_]
#Get the current time
set now [$ns now]
#Calculate the bandwidth (in MBit/s) and write it to the files
puts $f0 "$now [expr $bw0/$time*8/1000000]"
puts $f1 "$now [expr $bw1/$time*8/1000000]"
#Reset the bytes_ values on the traffic sinks
$sink4 set bytes_ 0
$sink5 set bytes_ 0
#Re-schedule the procedure
$ns at [expr $now+$time] "record"
}
proc attach-expoo-traffic { node sink size burst idle rate agent traffica } {
#Get an instance of the simulator
set ns [Simulator instance]
#Erzeugen neuer Agents und konfig. parameter setzen
set source [new Agent/$agent]
$ns attach-agent $node $source
##Create an Expootraffic agent and set its configuration parameters
set traffic [new Application/Traffic/$traffica]
$traffic set packetSize_ $size
$traffic set burst_time_ $burst
$traffic set idle_time_ $idle
$traffic set rate_ $rate
$traffic color "red"
# Attach traffic source to the traffic generator
$traffic attach-agent $source
#Connect the source and the sink
$ns connect $source $sink
return $traffic
}
#Finishprozedur hinzufügen
proc finish {} {
global ns nf f0 f1
$ns flush-trace
close $f0
close $f1
close $nf
exec xgraph out0.tr out1.tr -geometry 800x400 &
exec nam out1.nam &
exit 0
}
#create the two sink / zwei Empfänger erzeugen
set sink4 [new Agent/LossMonitor]
set sink5 [new Agent/LossMonitor]
$ns attach-agent $n4 $sink4
$ns attach-agent $n5 $sink5
#create the two sources / zwei Sources erzeugen
set rtp0 [attach-expoo-traffic $n0 $sink4 500kb 0.02s 0.5s 500k RTP RealAudio]
set udp1 [attach-expoo-traffic $n1 $sink5 500Gb 0.02s 0.5s 500k UDP CBR]
#distinguish the streams / Unterscheiden der Verkehrsströme
$rtp0 set class_ 2
$udp1 set class_ 1
#color the streams / Markierung der Stöme
$ns color 2 "Red" ;# <--?
$ns color 1 "Green" ;# <--?
#watch the queue / überwachen der Warteschlange
$ns duplex-link-op $n2 $n3 queuePos 0.5
$ns duplex-link-op $n3 $n2 queuePos 0.5
#start record / Aufnahme beginnen
$ns at 0.0 "record"
#define start stop / Sendebeginn und -ende definieren
$ns at 0.2 "$udp1 start"
$ns at 4.1 "$udp1 stop"
$ns at 0.1 "$rtp0 start"
$ns at 4.5 "$rtp0 stop"
#fix simulation time / Simulationsdauer festlegen
$ns at 5.0 "finish"
#start simulation / starten der Simulation
$ns run
Best regards from Germany / Viele Grüße aus Deutschland
Tom
