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[ns] problem with flow monitoring
hi all
This is james and iam a new user of ns2.Actually I
have to calculate throughput and delay on a per flow
basis.
and iam also trying to trace the size of the
congestion window.
i am getting an error whicle using flowmonitor.can any
one please help me in solving this error. Any help
would be greatly appreciated.
I have a simple scenario like this
n0----| |-----n3
n2-----|
n1----| ------n4
#Create a simulator object
set ns [new Simulator]
#Define different colors for data flows (for NAM)
$ns color 1 Blue
$ns color 2 Red
#Open the NAM trace file
set nf [open out.nam w]
$ns namtrace-all $nf
#Open the Trace file
set tf [open out.tr w]
$ns trace-all $tf
#Define a 'finish' procedure
proc finish {} {
global ns nf tf
$ns flush-trace
#Close the NAM trace file
close $nf
#Close the Trace file
close $tf
#Execute NAM on the trace file
exec nam out.nam &
exit 0
}
#Create four nodes
set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]
set n4 [$ns node]
#Create links between the nodes
$ns duplex-link $n0 $n2 2Mb 10ms DropTail
$ns duplex-link $n1 $n2 2Mb 10ms DropTail
$ns duplex-link $n2 $n3 1.7Mb 20ms RED
$ns duplex-link $n2 $n4 1.7Mb 20ms DropTail
#Give node position (for NAM)
$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-down
$ns duplex-link-op $n2 $n4 orient right-up
set fm [open all.fm w]
set fmon [$ns makeflowmon Fid ]
$ns attach-fmon [$ns link $n0 $n3 ] $fmon
$ns attach-fmon [$ns link $n1 $n4 ] $fmon
$fmon attach $fm
$ns at 5.0 "$fmon dump"
#Setup a TCP connection
set tcp [new Agent/TCP]
$tcp set class_ 2
$tcp trace cwnd_
$tcp attach [open siri.tr w]
$ns attach-agent $n0 $tcp
set sink [new Agent/TCPSink]
$tcp set fid_ 1
$ns attach-agent $n3 $sink
$ns connect $tcp $sink
$tcp set fid_ 1
$sink set interval_ 100
$tcp set window_ 10
$tcp set packetSize_ 500
set tcp1 [new Agent/TCP]
$tcp1 set class_ 1
$ns attach-agent $n1 $tcp1
set sink1 [new Agent/TCPSink]
$sink1 set fid_ 2
$ns attach-agent $n4 $sink1
$ns connect $tcp1 $sink1
$tcp1 set fid_ 2
$tcp1 trace cwnd_
$tcp1 attach [open siri.tr w]
$sink1 set interval_ 10
$tcp1 set window_ 1000
$tcp1 set packetSize_ 700
#Setup a FTP over TCP connection
set telnet [new Application/FTP]
$telnet attach-agent $tcp
$telnet set type_ TELNET
$telnet set interval_ 100
set telnet0 [new Application/FTP]
$telnet0 attach-agent $tcp1
$telnet0 set type_ TELNET
$telnet0 set interval_ 100
#Schedule events for the CBR and FTP agents
$ns at 0.1 "$telnet start"
$ns at 1.0 "$telnet0 start"
$ns at 3.0 "$telnet0 stop"
$ns at 4.5 "$telnet stop"
#Call the finish procedure after 5 seconds of
simulation time
$ns at 5.0 "finish"
#Run the simulation
$ns run
following is the error being generated
% ns tcp1.tcl
invalid command name ""
while executing
"$
hi all
This is james and iam a new user of ns2.Actually I
have to calculate throughput and delay on a per flow
basis.
and iam also trying to trace the size of the
congestion window.
i am getting an error whicle using flowmonitor.can any
one please help me in solving this error. Any help
would be greatly appreciated.
I have a simple scenario like this
n0----| |-----n3
n2-----|
n1----| ------n4
#Create a simulator object
set ns [new Simulator]
#Define different colors for data flows (for NAM)
$ns color 1 Blue
$ns color 2 Red
#Open the NAM trace file
set nf [open out.nam w]
$ns namtrace-all $nf
#Open the Trace file
set tf [open out.tr w]
$ns trace-all $tf
#Define a 'finish' procedure
proc finish {} {
global ns nf tf
$ns flush-trace
#Close the NAM trace file
close $nf
#Close the Trace file
close $tf
#Execute NAM on the trace file
exec nam out.nam &
exit 0
}
#Create four nodes
set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]
set n4 [$ns node]
#Create links between the nodes
$ns duplex-link $n0 $n2 2Mb 10ms DropTail
$ns duplex-link $n1 $n2 2Mb 10ms DropTail
$ns duplex-link $n2 $n3 1.7Mb 20ms RED
$ns duplex-link $n2 $n4 1.7Mb 20ms DropTail
#Give node position (for NAM)
$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-down
$ns duplex-link-op $n2 $n4 orient right-up
set fm [open all.fm w]
set fmon [$ns makeflowmon Fid ]
$ns attach-fmon [$ns link $n0 $n3 ] $fmon
$ns attach-fmon [$ns link $n1 $n4 ] $fmon
$fmon attach $fm
$ns at 5.0 "$fmon dump"
#Setup a TCP connection
set tcp [new Agent/TCP]
$tcp set class_ 2
$tcp trace cwnd_
$tcp attach [open siri.tr w]
$ns attach-agent $n0 $tcp
set sink [new Agent/TCPSink]
$tcp set fid_ 1
$ns attach-agent $n3 $sink
$ns connect $tcp $sink
$tcp set fid_ 1
$sink set interval_ 100
$tcp set window_ 10
$tcp set packetSize_ 500
set tcp1 [new Agent/TCP]
$tcp1 set class_ 1
$ns attach-agent $n1 $tcp1
set sink1 [new Agent/TCPSink]
$sink1 set fid_ 2
$ns attach-agent $n4 $sink1
$ns connect $tcp1 $sink1
$tcp1 set fid_ 2
$tcp1 trace cwnd_
$tcp1 attach [open siri.tr w]
$sink1 set interval_ 10
$tcp1 set window_ 1000
$tcp1 set packetSize_ 700
#Setup a FTP over TCP connection
set telnet [new Application/FTP]
$telnet attach-agent $tcp
$telnet set type_ TELNET
$telnet set interval_ 100
set telnet0 [new Application/FTP]
$telnet0 attach-agent $tcp1
$telnet0 set type_ TELNET
$telnet0 set interval_ 100
#Schedule events for the CBR and FTP agents
$ns at 0.1 "$telnet start"
$ns at 1.0 "$telnet0 start"
$ns at 3.0 "$telnet0 stop"
$ns at 4.5 "$telnet stop"
#Call the finish procedure after 5 seconds of
simulation time
$ns at 5.0 "finish"
#Run the simulation
$ns run
following is the error being generated
% ns tcp1.tcl
invalid command name ""
while executing
"$lnk attach-monitors $isnoop $osnoop $dsnoop $fm"
(procedure "_o3" line 5)
(Simulator attach-fmon line 5)
invoked from within
"$ns attach-fmon [$ns link $n0 $n3 ] $fmon "
(file "tcp1.tcl" line 59)
please some one help me in this regard..
Thanx
james
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