Re: [ns] configure ns problem

[Luqman]

hi,

 [EMAIL PROTECTED] wanted us to know:

Dear all,
 Now I meet a tough problem that I can not configure ns . when I run ns in 
 command line prompt. It gives me that information :
When configured, ns found the right version of tclsh in 
/home/wjw101/ns-allinon e-2.30/bin/tclsh8.4brbut it doesn't seem to be there 
anymore, so ns will fall back on running the fir st tclsh in your path. The 
wrong version of tclsh may break the test suites. Re configure and rebuild ns 
if this is a problem.br%
I can also run TCL script, but when i modified the *.cc  and  *.h file  and 
run make  make  depend make command,   I find that modification does not work 
, I do not konw why it is.

Did you try 2 different ns installations on you pc. I would check for
the variables (PATH, LD_LIBRARY etc..) if they are set correctly.

If it does not work / or additioally, you can try
make clean
make 
Regards,

-- 
Luqman

[ns] problems after tampering with the queue

[Luqman]

hello,

I like to do some modifications to the ns code (2.30 with eurane) and
face some strange problem when I dequeue a packet from the
retransmission buffer, change a parameter (a new counter added by
myself to hdr_rlc structure) and enque the packet at the original place.


Simulation runs normally sometimes and the next time it stops with varying 
warnings and errors.

1) ns: scheduler going backwards in time from 11.900015 to 11.899000.
2) Scheduler: Event UID not valid!
3) Direction for pkt-flow not specified; Sending pkt up the stack on
default.

Segmentation fault (core dumped)

I just took a packet from the queue, changed the retransmission counter
and put that packet back on the queue at the same place. Nothing else
was changed.

Any ideas?

-- 
Luqman

Re: [ns] How to disable all the trace outputs

[Luqman]

Dear All,

I'm simulating a wireless network with 500 nodes. I have turned off all the 
trace options in my tcl file. However, still lines are appending to the output 
file and after a while the file gets huge. It really make the simulation slow. 

Does anybody know how can I turn off tracing completely?

Maybe you can provide (part of) your code. This would help understand
the mistake.

Regards,

-- 
Luqman

Re: [ns] random number not really random in my script [SOLVED]

[Luqman]

hi all,

for the sake of completion.
 Luqman wanted us to know:

Though errors are inserted in the received packets these errors occur at
the same place during every run of simulation. 

I think this is not intended so. Random variable should contain
different numbers every time random function is called.

After reading up in the ns-manual while searching for random and
seed, I found that ns-ransom 0 choses the seed at run time whereas
otherwise a static seed was being used.

Hope this helps others with same questions.

Regards,



-- 
Luqman

Re: [ns] How to exclude the droped packet from trace file

[Luqman]

hi Wajid,

 wajid wanted us to know:
I want to exclude the droped packet from trace file because I used 
 traffic source rate equal to channel rate i.e 11Mbps and it creates lot of 
 droped packets which increase the trace file size, and i am running 
 simulation for 1 to  40 stations and it has exceeded the size of the hard 
 disk,
  Any suggestions ?
  thanks in advance
  wajid

Chapter 25 in The ns Manual handles with trace issue. Maybe you can
use create-trace, drop-trace, trace-queue etc.. instead of
trace-all. 

$ns_ create-trace type file src dst optional:op

Here create-trace allows to define src and dst nodes that are to be
traces. With type and optional:op you can further reduce the size of
trace. I didn't find quickly how to set optional:op value though.
Maybe someone on this list can help.

Furthermore, NS simulator for beginners describes how to reduce size
of trace files with gawk, perl, grep etc. under unix-based operating
systems.

Good luck.

Regards,

-- 
Luqman

[ns] LL implementation in ns-2 RFC conformant?

[Luqman]

hi,

I was wondering whether LL (link layer) implemented in current version
includes timer mechanism.

I plan to have two node connected to LAN and have them send data with
acknowledgment mode of LL. I could not find a hint in the latest
ns-manual whether a retransmission request is abandoned once there is
not reply in some predefined time?

Example: 

host1 == host2
(sender)ethernet (receiver)

Once host2 detects a missing frame, it requests host1 to resend the
concerning frame. However it would not wait forever for retransmission
of this frame. After a timer is expired, this frame is marked as
missing. This is how standard (RFC) says.

I do not know whether something like is enabled in current version of
ns2?

Your thoughts are much appreciated.

Regards,

-- 
Luqman

Re: [ns] Installing ns-2.26 in FC5!

[Luqman]

hi,

 Diana Asnani wanted us to know:


Hi folks,
Has anyone successfully installed ns-2.26 in FC5? It says
tcl8.3.2configuration failed! Is there a way to fix the tcl? Please
let me
know.Thanks.

If you can do without FC5 then have a try with mandriva LE2005 (limited
edition 2005). It comes with gcc-3.4.3 and installation of ns2.28 and
ns2.30 worked fine on it.

Cheers,

-- 
Luqman

Re: [ns] Installation problem Linux x86_64

[Luqman]

 ivan guardiola wanted us to know:


Checking for XOpenDisplay in -X11 . no

Can't find X library


Please have a look in mailarchives before posting. You probably need x
development files.



-- 
Luqman

Re: [ns] installation problem Linux X86_64

[Luqman]

Checking for XOpenDisplay in -lX11. no

Can't find X library 

I would install XFree86 development libraries.



-- 
Luqman

Re: [ns] ns 2 allinone installation error in Xgraph and TK

[Luqman]

hello

  When i try to install ns2 allinone under linux, i got the error as 
   
  xgraph.h:10:21: X11/Xos.h: No such file or directory
  xgraph.h:11:22: X11/Xlib.h: No such file or directory
  xgraph.h:12:23: X11/Xutil.h: No such file or directory
  xgraph.h:13:28: X11/cursorfont.h: No such file or directory
  In file included from xgraph.c:32:

Please install XFree86 development libraries.

Cheers,

-- 
Luqman

[ns] validate: some tests in ./test-all-webcache failed

[Luqman]

hello,

after installing ns-2.28 on Ubuntu6.06 (bash 3.00.16, gcc 2.95.4, g++
2.95.4), some validation tests did not pass. 

During the installation everything went smoothly except for gt-itm 
sgb2ns which are optional components.


./test-all-newreno and ./test-all-webcache both failed ./validate test.
Upon seperate execution, test-all-newreno passed completely but
test-all-webcache grouses about following 5 parts that failed.


(all were called by the script ./test-all-webcache)
1) Mcast-PBtr:
2) Mcast-PBPtr:
3) Mcast-PBUtr:
4) ttl-PBtr:
5) ottl-PBtr:


Error message for every failed test is similar to Mcast-PBtr:

Running test Mcast-PBtr:
../../ns test-suite-webcache.tcl Mcast-PBtr
Test output differs from reference output
Diagnose with: diff test-output-webcache/Mcast-PBtr.test
test-output-webcache/Mcast-PBtr
Or see URL http://www.isi.edu/nsnam/ns/ns-problems.html;.
next?


I did not find any ideo on http://www.isi.edu/nsnam/ns/ns-problems.html.
Can anyone give me a hint whether this is a severe error or can I ignore
them and go on with my umts simulation that won't simulate anything
webcaching related?

It is extemely important for me that simulation result is not tampered by these 
faults. Thus I would be grateful for any ideas.

Cheers,
-- 
Luqman

Re: [ns] validate: some tests in ./test-all-webcache failed

[Luqman]

./test-all-newreno and ./test-all-webcache both failed ./validate test.
Upon seperate execution, test-all-newreno passed completely but
test-all-webcache grouses about following 5 parts that failed.


(all were called by the script ./test-all-webcache)
1) Mcast-PBtr:
2) Mcast-PBPtr:
3) Mcast-PBUtr:
4) ttl-PBtr:
5) ottl-PBtr:

Some old posting
(http://www.isi.edu/nsnam/archive/ns-users/webarch/2001/msg00673.html)
suggest to use the -g option to tacle these test validation errors.
Though this option is suggested for Solaris users, since I don't know
what else to try I would like to have a go with it.

But I don't know where to use that option. I used allinone package.
Any ideas?

-- 
Luqman

Re: [ns] what I\'m interested in is interface queue

[Luqman]

Please adjust maximum line size to less than 70 characters.

Regards,

Luqman 

Re: [ns] Help: ns installation failed

[Luqman]

 Luqman wanted us to know:

hello, 

I am trying to install ns2.28 on Ubuntu 6.06 with following components:

gcc version 3.3.6 
GNU bash, version 3.00.16(1)-release (i386-pc-linux-gnu)
2.6.15-26-386


Just for the sake of completeness, I did installa ns2 successfull
though after seesaw, i.e. hat to try out a lot of gcc, bash versions and
combinations of them.

Finally, gcc-2.95 and GNU bash, version 3.00.16(1)-release
(i386-pc-linux-gnu) from Hoary worked for me. 

Only nam is not installed but I can live with that.

cheers,


-- 
Luqman

[ns] Help: ns installation failed

[Luqman]

hello, 

I am trying to install ns2.28 on Ubuntu 6.06 with following components:

gcc version 3.3.6 
GNU bash, version 3.00.16(1)-release (i386-pc-linux-gnu)
2.6.15-26-386

Everything seems to run smoothly until final linking process for ns
begins:

g++  -o ns \
...
/skipping

'.gnu.linkonce.t._ZN11taskPending10taskStatusEh' referenced in section
`.rodata' of wpan/p802_15_4mac.o: defined in discarded section
`.gnu.linkonce.t._ZN11taskPending10taskStatusEh' of wpan/p802_15_4mac.o
collect2: ld gab 1 als Ende-Status zurück (engl: ld returned 1 as end
status)
make: *** [ns] Fehler 1 (engl: error 1)
Ns make failed!
See http://www.isi.edu/nsnam/ns/ns-problems.html for problems


I have tried a lot of different combinations of gcc/bash and distros.
The above mentioned combination has brought me closest. 

Can anyone give me a hint, please? 


Regards,

-- 
Luqman

[ns] A simple umts scenario

[Luqman Munawar]

hello,

I have patched ns-2.28 with EURANE. I wanted to test the UMTS link but 
my code seem to contain some error. UE, node 2 in my case, is not 
connected as visible in nam even though I have created a DCH channel.

Can anyone give a hint what could be wrong in the following script.

Thank you in anticipation. cheers,

Luqman



.
#Create a simulator object
set ns [new Simulator]

#Open the nam trace file
set nf [open out.nam w]
$ns namtrace-all $nf

#Define a 'finish' procedure
proc finish {} {
global ns nf
$ns flush-trace
#Close the trace file
close $nf
#Execute nam on the trace file
exec nam out.nam 
puts Simulation ended!
exit 0
}

# Insert your own code for topology creation
# and agent definitions, etc. here

# Node address is 0
$ns node-config -UmtsNodeType rnc
set rnc [$ns create-Umtsnode]

# Node address is 1
$ns node-config -UmtsNodeType bs \
-downlinkBW 32kbs \
-downlinkTTI 10ms \
-uplinkBW 32kbs \
-uplinkTTI 10ms \

set bs [$ns create-Umtsnode]

#Iub configuration between RNC and BS
$ns setup-Iub $bs $rnc 622Mbit 622Mbit 15ms 15ms DummyDropTail 2000

# Node address for ue1 is 2
$ns node-config -UmtsNodeType ue \
-baseStation $bs \
-radioNetworkController $rnc

set ue1 [$ns create-Umtsnode]

# Node address for sgsn0 and ggsn0 is 3 and 4, respectively
set sgsn0 [$ns node]
set ggsn0 [$ns node]

# Node address for node1 is 5
set node1 [$ns node]

$ns duplex-link $node1 $ggsn0 622Mbit 1ms DropTail 1000
$ns duplex-link $ggsn0 $sgsn0 622Mbit 1ms DropTail 1000
$ns duplex-link $sgsn0 $rnc 622Mbit 1ms DropTail 1000

$rnc add-gateway $sgsn0

set rtp_sender [new Agent/RTP]
$ns attach-agent $node1 $rtp_sender

set rtp_receiver [new Agent/RTP]
$ns attach-agent $ue1 $rtp_receiver

# Create a CBR traffic source and attach it to udp0
set cbr0 [new Application/Traffic/CBR]
$cbr0 set packetSize_ 500
$cbr0 set interval_ 0.005
$cbr0 attach-agent $rtp_sender

#creation of DCH channel
$ns node-config -llType UMTS/RLC/AM \
-downlinkBW 64kbs \
-uplinkBW 64kbs \
-downlinkTTI 10ms \
-uplinkTTI 10ms

set dch0 [$ns create-dch $ue1 $rtp_receiver]

#Call the finish procedure after 5 seconds simulation time
$ns at 5.0 finish

#Run the simulation
$ns run