Hello, first of all read my previous mail.
I just want to change it's end :
the topology needs to look like this
n1---| |---n4
n2---|- - r1- -|---n5
n3---| |---n6
n1,n2,n3 tcp/udp agents
n4,n5,n6 sink/null agents
r1 I create separately
thanks.
---------- Forwarded message ----------
Hi,Thanks.
first, The error that I got:
~/ns-allinone-2.34/ns-2.34/v1$ ns script.tcl
can't read "n": no such variable
while executing
"$ns duplex-line $n$i $ns[expr $i+1] 5Mb 2ms Drop Tail "
("for" body line 6)
invoked from within
"for {set i 0} {$i < $numofnodes} {incr i} {
set n$i [$ns node]
if {$i == [expr $numofnodes - 1]} {
$ns duplex-line $n[expr $i - 1] $ns..."
(file "script1.tcl" line 49)
More questions..
1. Why duplex-line instead of duplex-link?
2. What is $ns[expr $i+1]. why not $n[expr $i+1]?
3. How the next node (i+1) can be known if I will create it just in the next
loop?
by the way, my topology needs to look like this:
n1---|
n2---|
n3---|-r1
n4---|
n5---|
r1: I create separately.
Thank you!
On Thu, May 19, 2011 at 12:22 AM, мαłłi <malli....@gmail.com> wrote:
> Tami,
>
> For your question my answer is
> 1. yes u got it, i forget to put s instead i put number thanks
> 2. yes we can do
>
> The topology
>
> n1 --- n2 --- n3 --- n4 --- n5
>
> set requiredNodes 5
> for {set i 0} {$i < $requiredNodes} {incr i} {
>
> set n$i [$ns node]
> if {$i == [expr $requiredNodex - 1]} {
> $ns duplex-line $n[expr $i - 1] $ns$i 5Mb 2ms Drop Tail
> } else {
> $ns duplex-line $n$i $ns[expr $i+1] 5Mb 2ms Drop Tail
> set tcp [new Agent/TCP]
> $tcp set class_ 1
> $ns attach-agent $n$i $tcp
> set sink [new Agent/TCPSink]
> $ns attach-agent $n[expr $i+1] $sink
> }
> }
>
> I didn't test the script, i generally wrote this one, please test it and
> let me know status of this,
> if you want specify specific bandwidth between the nodes, you manually
> stored in a list
> suppose *set bandwidth [ 2Mb, 3Mb, 4Mb, 5Mb, 0.2Mb] by using list index*we
> can get the bandwidth
> similarly what ever you need (specifically) that stored in a list and use
> them
>
>
> 2011/5/17 Tami
>
>> Thank you for all answers.
>> 1. Did you mean to write like this?(with s)
>> set s 10
>> for {set i 0} {$i < *$s*} {incr i} {
>>
>> set n$i [$ns node]
>>
>> 2. I want also to create* links* between the nodes, to *attach
>> agents(tcp or udp)* and *start them*.
>> I need to do everey thing in the same way, with for ?
>> ex.
>> for {set j 0} {$j < $s/2} {incr j} {
>> $ns duplex-link n$j n$s/2+$j 2Mb 10ms DropTail
>> # Is it right to write like this?? and what can I do if I want to change
>> the bandwidth sometimes?
>>
>> *Thank you!
>> *
>>
>> On Tue, May 17, 2011 at 2:33 PM, мαłłi <malli....@gmail.com> wrote:
>>
>>> Tami,
>>>
>>> What I understand you question is you have an variable, based on that you
>>> need to create that much of users?
>>> Ex. set s 10
>>> for {set i 0} {$i < 10} {incr i} {
>>> set n$i [$ns node]
>>>
>>> }
>>>
>>>
>>> On 17 May 2011 15:43, Tami Nesher <vessely...@gmail.com> wrote:
>>>
>>>>
>>>> Hi,
>>>> How can I create nodes according to a variable number?
>>>> I mean : I have a variable that contains the number of nodes that I need
>>>> to
>>>> create. How can I do it?
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> Thanks,
>>>
>>> The box said "Requires Windows 95, NT, or better", so I installed Linux.
>>>
>>> Mallikarjun [:)]
>>>
>>> [image: YouTube] <http://in.youtube.com/mallikv> [image:
>>> Blogger]<http://basicnetworktipsntricks.blogspot.com/> [image:
>>> LinkedIn] <http://www.linkedin.com/in/mallikarjunaraok>
>>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
>
> Thanks,
>
> The box said "Requires Windows 95, NT, or better", so I installed Linux.
>
> Malli [:)]
>
> [image: YouTube] <http://in.youtube.com/mallikv> [image:
> Blogger]<http://basicnetworktipsntricks.blogspot.com/> [image:
> LinkedIn] <http://www.linkedin.com/in/mallikarjunaraok>
>
>
