Ns internals

Schedule initial

And final events

Simple script – schedule “at” events

set ns [new Simulator]

$ns use-scheduler List

set n0 [$ns node]

set n1 [$ns node]

$ns duplex-link $n0 $n1 1Mb 10ms DropTail

set cbr0 [new Agent/CBR]

$ns attach-agent $n0 $cbr0

$cbr0 set packetSize_ 500

$cbr0 set interval_ 0.005

set null0 [new Agent/Null]

$ns attach-agent $n1 $null0

$ns connect $cbr0 $null0

$ns at 0.5 "$cbr0 start"

$ns at 4.5 "$cbr0 stop"