Hello everyone, i am trying to make an ethernet implementation on ns2. I have a tcl script;


Queue set limit_ 10
set opt(node) 8; # No. of nodes, n
set opt(bw) 10Mb; # Nominal link bandwidth
set opt(delay) 0.1ms; # Nominal link delay
set opt(ll) LL; # Link layer to use in ns-2
set opt(ifq) Queue/DropTail
# Drop tail queue to be used for buffers
# Drop tail queue drops from the tail end
# when full.
set opt(mac) Mac/802_3
# MAC protocol type
set opt(chan) Channel;

proc create-topology {} {
global ns opt
global lan node

set num $opt(node)
for {set i 0} {$i < $num} {incr i} {
set node($i) [$ns node]
lappend nodelist $node($i)
}

# This really specifies how the LAN should look like.

set lan [$ns newLan $nodelist $opt(bw) $opt(delay) \
-llType $opt(ll) -ifqType $opt(ifq) \
-macType $opt(mac) -chanType $opt(chan)]
}

## MAIN ##

set ns [new Simulator]
set tracefile [open output.tr w]
$ns trace-all $tracefile

create-topology

proc finish {} {
global ns tracefile
global lan
$ns flush-trace
close $tracefile
exit 0
}
# Set num = n-1
set num [ expr $opt(node) - 1 ]

for {set i 0} {$i < $num} {incr i} {

# Create and attach the UDP agent on the source nodes
set udp($i) [new Agent/UDP]
$ns attach-agent $node($i) $udp($i)

# Create an application (CBR) that will actually generate the
# traffic. Specify the parameters and attach it to UDP.

set cbr($i) [new Application/Traffic/CBR]
$cbr($i) set packetSize_ 64
$cbr($i) set rate_ 1.0Mb
$cbr($i) set random_ 1
$cbr($i) attach-agent $udp($i)

set sink($i) [new Agent/Null]
$ns attach-agent $node($num) $sink($i)
$ns connect $udp($i) $sink($i)

$ns at 0.0 "$cbr($i) start"
$ns at 2.0 "$cbr($i) stop"
}

$ns at 3.0 "finish"

$ns run

I obtain a trace file as a result, and want to analyze throughput, delay, jitter, packet delivery ratio of this file, how can i do this, please help me

First, this is NOT URGENT for anyone here...we volunteer our time, so asking for/expecting 'urgent' help is rude. Secondly, you need to read the "Question Guidelines" link in my posting signature...we're happy to help, but what have you done/tried/researched so far??? Plenty of info here:

http://bfy.tw/91cS

Of course i have done researches, i obtained a trace file but it is in old format, now i am trying to use an awk file to calculate throughput, but awk files generally calculate new format of trace file, so now i'm searching to obtain new trace file from my tcl script, thanks for your "plenty info".

If you want to be snotty, ask somewhere else. Otherwise, as you were told, read the "Question Guidelines"...we have NO IDEA what you've done/tried until you actually POST IT, do we??? You don't post what you did get, what you've tried/done, etc., just that it's 'urgent' for you (and your homework is NOT urgent).

Post a sample of your trace file, the awk script you're running, what you're getting, and what you WANT to see, and we can try to help. But we aren't going to look things up for you, nor write your scripts for you. Show your effort, and we'll be glad to help

I have a tcl script named etherlan.txt, and trying to use an awk file named throughput.txt in the attached files to obtain throughput characteristic, but I can not view sent packets by the source in my trace file, how can i obtain them? I couldn't attach my trace file because it's size is too big. Here is an example of my output trace file:

h 0 0 8 cbr 512 ------- 0 0.0 7.0 0 0
h 0 1 8 cbr 512 ------- 0 1.0 7.1 0 1
h 0 2 8 cbr 512 ------- 0 2.0 7.2 0 2
h 0 3 8 cbr 512 ------- 0 3.0 7.3 0 3
h 0 4 8 cbr 512 ------- 0 4.0 7.4 0 4
h 0 5 8 cbr 512 ------- 0 5.0 7.5 0 5
h 0 6 8 cbr 512 ------- 0 6.0 7.6 0 6
+ 0.0001 0 8 cbr 512 ------- 0 0.0 7.0 0 0
- 0.0001 0 8 cbr 512 ------- 0 0.0 7.0 0 0
+ 0.0001 1 8 cbr 512 ------- 0 1.0 7.1 0 1
- 0.0001 1 8 cbr 512 ------- 0 1.0 7.1 0 1
+ 0.0001 2 8 cbr 512 ------- 0 2.0 7.2 0 2
- 0.0001 2 8 cbr 512 ------- 0 2.0 7.2 0 2
+ 0.0001 3 8 cbr 512 ------- 0 3.0 7.3 0 3
- 0.0001 3 8 cbr 512 ------- 0 3.0 7.3 0 3
+ 0.0001 4 8 cbr 512 ------- 0 4.0 7.4 0 4
- 0.0001 4 8 cbr 512 ------- 0 4.0 7.4 0 4
+ 0.0001 5 8 cbr 512 ------- 0 5.0 7.5 0 5
- 0.0001 5 8 cbr 512 ------- 0 5.0 7.5 0 5
+ 0.0001 6 8 cbr 512 ------- 0 6.0 7.6 0 6
- 0.0001 6 8 cbr 512 ------- 0 6.0 7.6 0 6
r 0.000658 8 7 cbr 512 ------- 0 1.0 7.1 0 1
r 0.00111 8 7 cbr 512 ------- 0 5.0 7.5 0 5
r 0.001612 8 7 cbr 512 ------- 0 2.0 7.2 0 2
r 0.002046 8 7 cbr 512 ------- 0 6.0 7.6 0 6

Attached Files

	etherlan.txt (2.8 KB, 61 views)
	throughput.txt (1.4 KB, 64 views)