[ns] Bidirectional traffic

[Bilal T.]

hi everyone,

i set a bidirectional cbr application traffic between two nodes n0 and n19
this way:

set udp0 [new Agent/UDP]
set sink19 [new Agent/Null]
$ns_ attach-agent $node_(0) $udp0
$ns_ attach-agent $node_(19) $sink19
$ns_ connect $udp0 $sink19
set cbr0 [new Application/Traffic/CBR]
$cbr0 set packetSize_ 260
$cbr0 set interval_ 0.020

$cbr0 attach-agent $udp0
$ns_ at 0.3 "$cbr0 start"

set udp19 [new Agent/UDP]
set sink0 [new Agent/Null]
$ns_ attach-agent $node_(19) $udp19
$ns_ attach-agent $node_(0) $sink0
$ns_ connect $udp19 $sink0
set cbr19 [new Application/Traffic/CBR]
$cbr19 set packetSize_ 260
$cbr19 set interval_ 0.020

$cbr19 attach-agent $udp19
$ns_ at 1.0 "$cbr19 start"


I get a segmentation fault which disappear when increasing interval to 20
seconds for example

1- is this the correct way to set such traffic
2- what can be the cause of the segmentation fault

thank you,