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I am new to NS and i am trying to build a simple
topology with hierarchical addressing with TCP Traffic when i run the script It
gives me an illegal operation error on 98
but when i work the same script with flat
addressing the script runs perfectly
can anyone help me out with this problem
I am attaching the script so if there is any
problem with it please tell me
set ns [new Simulator] $ns rtproto Session $ns set-address-format hierarchical
set f [open out.tr w] $ns trace-all $f set nf [open out.nam w] $ns namtrace-all $nf
AddrParams set domain_num_ 1 lappend cluster_num 1 AddrParams set cluster_num_ $cluster_num lappend eilastlevel 4 AddrParams set nodes_num_ $eilastlevel
set num_node 4
proc finish {} { global ns nf global ns f $ns flush-trace close $nf close $f exit 0 } set temp {0.0.0 0.0.2 0.0.11 0.0.6}
for {set i 0} {$i < $num_node } {incr i} { set n($i) [$ns node [lindex $temp $i]] puts " [$n($i) node-addr]" puts " [$n($i) id]" }
for {set i 0} {$i < $num_node} {incr i} { $ns duplex-link $n($i) $n([expr ($i+1)%$num_node]) 1Mb 10ms DropTail } $ns duplex-link $n(0) $n(2) 1Mb 10ms DropTail $ns duplex-link-op $n(0) $n(1) queuePos 0.5
$ns cost $n(0) $n(1) 2 $ns cost $n(0) $n(3) 5 $ns cost $n(0) $n(2) 4 $ns cost $n(1) $n(2) 1 $ns cost $n(2) $n(3) 1 $ns cost $n(1) $n(0) 2 $ns cost $n(3) $n(0) 5 $ns cost $n(2) $n(0) 4 $ns cost $n(2) $n(1) 1 $ns cost $n(3) $n(2) 2
set tcp [new Agent/TCP] $ns attach-agent $n(0) $tcp set ftp [new Application/FTP] ; $ftp attach-agent $tcp set sink [new Agent/TCPSink] $ns attach-agent $n(3) $sink $ns at 0.5 "$ftp start" $ns connect $tcp $sink $ns rtmodel-at 1.0 down $n(1) $n(2) $ns rtmodel-at 2.0 up $n(1) $n(2) $ns at 5.0 "finish"
$ns run |