nslab_ex1b_06.tcl

来自「tcl程序demo by N. Sidiropoulos and R. Bro 」· TCL 代码 · 共 82 行

set speed 250000000
set distance 1120
set rate 28Kb
set packetSize 120
set interval 120


set delayS [expr $distance/$speed.0]
set delayMs [expr $delayS*1000.0]

set delay ${delayMs}ms
puts " DEaly = $delay rate = $rate"

Queue set limit_ 6

set ns [new Simulator]


$ns color 0 blue
$ns color 9 red
$ns color 2 white

set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]

puts n0=[$n0 id]
puts n1=[$n1 id]
puts n2=[$n2 id]

set f [open out.tr w]
$ns trace-all $f
set nf [open out.nam w]
$ns namtrace-all $nf

#Create a duplex link between the nodes
$ns duplex-link $n0 $n1 $rate $delay DropTail
$ns duplex-link $n1 $n2 $rate $delay DropTail

$ns duplex-link-op $n0 $n1 orient right
$ns duplex-link-op $n1 $n2 orient right

$ns duplex-link-op $n0 $n1 queuePos 0.5

set udp0 [new Agent/UDP]
$udp0 set fid_ 9
$ns attach-agent $n0 $udp0
$udp0 set class_ 9
$udp0 set packetSize_ $packetSize
set cbr0 [new Application/Traffic/CBR]
$cbr0 attach-agent $udp0
puts "default [$cbr0 set packetSize_]"
puts "default [$cbr0 set interval_]"
$cbr0 set packetSize_ $packetSize
#$cbr0 set interval_ $interval
$cbr0 attach-agent $udp0

puts [$cbr0 set packetSize_]
puts [$cbr0 set interval_]



set null0 [new Agent/Null]
$ns attach-agent $n2 $null0


$ns connect $udp0 $null0

$ns at 0.5 "$cbr0 start"


$ns at 2.0 "finish"

proc finish {} {
	puts "running nam..."
	exec nam out.nam &
	exit 0
}

$ns run