Re: [ns] ns 2 agents
I did play with the headers to test my own protocol. As far as I know NS you should be able to modify your own header information to add what you need. I am not enough savy to explain how I did it but I found this manual really helpful to understand how NS handles the headers. It also contains some examples that you can use as starting point. http://www.isi.edu/nsnam/ns/ns-documentation.html Hope it helps, -as On 9 Jul 2009, at 08:18, Τσιλιγγίρης Γεώργιος wrote: Hi to all, I am trying to simulate a simple call flow in ns 2. Something like the one attached. My idea is to create a new packet header with one int value and one agent for each node. Each message in the call flow is given an ID (1,2,3...). The first agent sends the first packet with the ID=1 to the second node. The agent on the second node receives the packet and sends one packet back (ID=2) and one packet to the third node (ID=3). The procedure continues in the same way. I created the packet header successfully but i have some problems with the agents. Has anyone done anything similar? Can anyone help me? George.
Re: [ns] CFT SyClick symposium on Click Modular Router
I just read a little about Click and it sounds really interesting. I have a project and I was thinking in using the default nodes of NS (adding later routing, classification, filtering, etc.) but now that I read about click I think it may be a better approach. There is a link in the Click's wiki in how to use it with NS-2, however I wonder if anybody has any more resources (presentations, tutorials, papers) about the use of Click and NS-2. Thanks, -as On 19 Jun 2009, at 09:47, Peter De Cleyn wrote: ~Our apologies if you receive multiple copies of this call for talks~ = = == CALL FOR TALKS AND DEMOS SyClick Symposium on Click Modular Router November 23-24, 2009 Ghent, Belgium sycl...@ua.ac.be http://www.syclick.ua.ac.be/ = = == Keynote: --- Eddie Kohler, creator of the Click Modular Router and ass. professor at UCLA Program: For the first time, a Click symposium will be organized to bring together users and developers of the Click Modular Router framework. This symposium is an opportunity for Click developers and researchers, and others interested in the wider field of networking, to get together to share knowledge and experiences. Over the course of two days attendees will be able to - meet other Click developers/researchers and find out how they use Click - get answers to technical questions - form relationships for future collaboration - hear about some cool Click applications. The first day of the symposium, a developer day will be held to freely exchange amongst each other thoughts and ideas about the future of Click. Topics include but are not limited to: - multiprocessing status and improvements - supporting per-flow state - debugging kernel routers - dynamically adding and removing element subgraphs - GUI development - educational applications - IPv6 status - generic network protocol support (e.g. addressing, generic routing tables) - annotation improvements - ... The next day, experiences about Click applications, development and/or research results using Click will be presented. To this end, we open a call for presentations for the following topics: - novel applications of Click - commercial applications of Click - Click customizations - Click innovations - lessons learned after using Click Submission: Authors are requested to submit a 1 page PDF file containing a description of the work they want to present. Based on the submitted contributions the organising committee will select four presentations for a 30 min talk and additional contributions for a poster session. Demonstrations of Click implementations are also highly encouraged. Contribution descriptions should be submitted through the symposium website before: September 14th, 2009. Organizers and Chairs: -- Prof. Chris Blondia, PhD Peter De Cleyn, PhD Michael Voorhaen, PhD Bart Braem, MSc Contact Information: -- Please direct any questions to sycl...@ua.ac.be IBBT - PATS - University of Antwerp Dep. Mathematics and Computer Science Middelheimlaan 1 B-2020 Antwerp Belgium
Re: [ns] Install ns2.26..mission impossible?!
Have you tried to install the BGP++ module in the latest version? May be you would need to modify the make files and the ns-default TCL file but it may be easier. -as On 26 Mar 2009, at 12:17, blerina wrote: Hello to everyone, I am trying to install ns 2.26 on Fedora Core 8. I'm installing this old version because i need to use the BGP++ module. I tried many times the installation and finally got this error: installation configuration problem: C++ compiler cannot create executables This makes me think it is a compiler version related problem. I have gcc 4.1 installed. Does anyone have had this kind of troubles? How did u resolve it? I will be so happy if finally i will be able to have a working version of ns2 installed on my pc. :( Thnx in advance, Blerina
Re: [ns] Running c++ code in NS
You have to include your code (I am not sure but I think that you should do it in the same path were the rest of the ns code is) and to modify the make files in order to compile your code. Check the own ns makefiles as an example, they will give you a hint of what to include. -as On 1 Mar 2009, at 12:04, Abhijeet Mirikar wrote: Dear all, I want to run my C++ code in NS. How it can be done? Please help. Regards, Abhijeet Mirikar
Re: [ns] ns in eclipse
Yes you can. You have to add the ns paths to eclipse. There is an old e-mail with the references of the libraries to include and the paths. Do a search in the list and you could find that e-mail. -as On 27 Feb 2009, at 21:14, sarym binome wrote: hello how can i integrate ns in eclipse ? have u any idea ? plz help me _ Sur Windows Live Ideas, découvrez en exclusivité de nouveaux services en ligne... si nouveaux qu'ils ne sont pas encore sortis officiellement sur le marché ! http://ideas.live.com
Re: [ns] assigning IP address to nodes
If you are working with your code in TCL may be you can make a map Node_ID (from ns) to an IP address in your TCL script. If you are working in C++ you can do what Sidney proposes. Either way you have a way to do it, may be not trivial but definitely possible. -as On 5 Nov 2008, at 15:55, Sidney Doria wrote: The best of NS-2 is its flexibility. If you didn't find a trivial solution to assign a simple IP to a node, you can add a new attribute to an inherited class of node. You can simply bind this new attribute in your TCL script and assign what IP you want on the node you want. The new atrribute can be of type nsaddr_t (IP address). Hope to be useful, Sidney Doria Brazil 2008/11/5 Marlos Marques [EMAIL PROTECTED]: Hello all, Currently, I am trying to implement an application layer multicast algorithm using NS2. For this purpose I need to assign IP address to every node in NS2. I checked out the NS2 nodes may have hierarchical routing addressing which is similar to IP addressing. But, I also found the addr command which apparently allows you to configure the node IP, so I can run the following code: set ns [new Simulator] set n0 [$ns node] set n1 [$ns node] $n0 addr 192.168.1.1 $n1 addr 192.168.1.2 But in the trace file I keep getting sequential identifiers. For example: + 0 1 2 tcp 40 --- 2 1.0 5.0 0 0 But I would like to get this one: + 0 192.168.1.1 192.168.1.2 tcp 40 --- 2 1.0 5.0 0 0 What am I doing wrong? Thanks in advance, Marlos -- Sidney Doria Redes ad hoc móveis Mestrado em Computação UFCG Brasil Nessa jornada, o conhecimento será o seu escudo... (Mestre dos Magos no episódio do grimoire de ouro)
Re: [ns] How to produce HTTP Packet/Traffic
I have never used it but I think that Packmime-http could be useful for you: http://ns-2.blogspot.com/2007/05/web-traffic-generation-in-ns-2-with.html The original link is not working but you can use the google cache: http://216.239.59.104/search?q=cache:2DxyFk3Ho-YJ:dirt.cs.unc.edu/packmime/+ns2+packmimehl=enct=clnkcd=1 Hope it helps, -as P.D. For examples check /opt/ns-allinone-2.31/ns-2.31/tcl/ex/packmime/ (or whatever path you have for your install) On 16 Jul 2008, at 19:35, Levent Kurt wrote: Hi there, I have a project to do in NS I found so many working examples on how to produce FTP or CBR, but I couldn't found any simple way to produce 5 HTTP packets from one location to another. I'm completely overloaded with other project at school and unfortunately don't have time to go too deep in information to produce 5 simple HTTP packets and show them in NAM :( All help will be appreciated, thanks from now.
Re: [ns] Why routing is performed on layer 2 in IEEE 802.11s wireless mesh networks standard
I remember something similar with Frame Relay and mostly with ATM, which in deed had its own routing protocol PNNI. I do not know about IEEE 802.11s but with ATM you need to switch the cells independently from the L3 protocol (then it came MPLS and we forgot about ATM), I imagine that 802.11s has some needs about meshing topologies, roaming, etc. that require that independent routing from the L3. Regards, -as On 19 May 2008, at 22:24, Ghada Al-Mashaqbeh wrote: Dear all, I just want to find a reasonable justfications of why the IEEE 802.11s standard have specified that routing must take place at layer 2 of the protocol stack not layer 3? and which is better routing on layer 2 or layer 3 of the protocol stack? Thanks, Ghada
Re: [ns] How to work in eclipse for NS-2 new protocol.
It would be great if you could share your experience in the wiki or in a blog. I just could not make ns compile in eclipse. -as On 2 May 2008, at 10:09, Salih ML wrote: I am able to build ns-2 with eclipse. However when I try to debug ns-2 using eclipse I am getting the following error: (Added a breakpoint inside scheduler.cc file) No symbol new in current context. No source file named scheduler.cc. Stopped due to shared library event No source file named scheduler.cc. Stopped due to shared library event No source file named scheduler.cc. Current language: auto; currently asm No source file named scheduler.cc. Does anybody know what would be problem? It looks like it can't find the scheduler.cc file. By the way, when I try to add a breakpoint using GDB from terminal I get the following error: (gdb) break scheduler.cc:129 No source file named scheduler.cc. Make breakpoint pending on future shared library load? (y or [n]) y Breakpoint 1 (scheduler.cc:129) pending. I installed ns-2.30 on a Ubuntu Linux machine. Thanks, Salih On Mon, Oct 22, 2007 at 12:23 AM, Sidney Doria [EMAIL PROTECTED] wrote: Azim, Eclipse TODO: - install cygwin (as much complete as possible, to avoid more trouble); - install ns in cygwin (don't forget the PATH, TCL_LIBRARY and LD_LIBRARY_PATH stuff at the end of installation) and validate; - install eclipse; - make a new directory to your protocol in /ns-allinone-2.32/ns-2.32/ - open eclipse and create a project and the files of tutorial - to complile, you MUST add (include) dirs like: ns-2.32. commom, trace, etc. in the eclipse (look for a menu like project/compiler/directories). so, lots of errors will gone in the next compile turn. - Take a look in compile errors to find more needed dirs to include until last compile error has gone Finally, I have tried: Vista + Cygwin +NS-2 + Eclipse but the BEST is: VirtualBox + Ubuntu 7.10 + NS-2 + Eclipse (or gedit and make) With this last package everything runs smooth and easy. Sidney Doria 2007/10/21, Azim [EMAIL PROTECTED]: Hi all, I am new in eclipse. I am using cygwin (g++) for compile and my ns-2.31 is in /usr/local directory. But I am not getting how can I write new protocol like ping.cpp in eclipse and compile NS-2. If anyone give me any idea, it would be very helpful for me. Regards Azim -- Sidney Doria Redes ad hoc móveis Mestrado em Computação UFCG Brasil Nessa jornada, o conhecimento será o seu escudo... (Mestre dos Magos no episódio do grimoire de ouro)
Re: [ns] RTT(please help me)
You could get the rtt by c++ and by tcl. Tcl might be easier. This is an example in tcl where $tcp0 is a tcp agent. set rtt [$tcp0 set rtt_] Regards, -as On 1 May 2008, at 17:59, d d wrote: Hello, I am new in ns. I simulate a simple topology with tcl. I want to calculate rtt of each packet that send with one of it's node, But I don't know how? Could you please help me? Should I use c++ or there is another way? Thank yo - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
Re: [ns] segmentation fault(core dumped) error
I have 69 nodes, it was working well until yesterday that I added one line to create a new variable. After the value set up the simulation crash around the middle, if I remove the line, it works well. The offending line could be something as silly as: set dummy 0 I wonder if any body knows any limits in the number of nodes (as the original e-mail), number of procedures, variables that the ns can handle in a tcl script. Thanks, -as On 14 Mar 2008, at 05:59, SS Mukaka wrote: I'm having problems with the above mentioned error when the number of nodes in my simulation is more than 30. I'm simulating my own protocol and it works well with nodes less than 30... Regards...
[ns] Rate-limit and rate-limit-strategy
I wonder if somebody has any documentation about rate-limit and rate-limit-strategy. Both are under ns/pushback. thanks, -as
Re: [ns] how can implement DDoS attack using ns2
It would depend of what you want to do. I am using UDP and CBR in a manual topology that I generated. There are some tools to automatic generate a big number of nodes but I have not tested yet. Now my attacks are confined to a small network. -as brij wrote: Dear all please guide me to implement DDos attacks in ns2. if anybody working in same area please reply. thanks B B Gupta, Member, IEEE Research Scholar Electronics Computer Engg.Deptt. IIT,ROORKEE Web: http://gupta.brij.googlepages.com mail id: [EMAIL PROTECTED] On 24/11/2007, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Welcome to posting to the ns-users mailing list! We automatically send this message to every new person who sends mail to the list. You should only receive it once. My apologies if the program contacts you twice, perhaps because you have multiple e-mail addresses or send mail from multiple machines. If you are an experienced ns-user who simply has not posted since we started using this responder, our apologies for inconveniencing you with this message. This message is intended to help inform users and cut down on redundant posts, which benefits everyone. Please look at the attached list of ns Frequently Asked Questions. If it answers your question, great! You're done. If not, please RE-SEND your original message to [EMAIL PROTECTED] A copy of your original message is included below for reference. You will NOT have to do re-send your message every time you post, only the FIRST time you send from a new account. The goal is to quickly help new users find the FAQ (hopefully answering their question). Thanks, -the ns development team The Network Simulator ns-2: Frequently Asked Questions (This FAQ is also on the web at http://www.isi.edu/nsnam/ns/ns-faq.html.) * _Where do I get ns?_ From the ns web site at http://www.isi.edu/nsnam/ns/ns.html and the download page http://www.isi.edu/nsnam/ns/ns-tests.html. * _What platforms does ns run on and what kind of hardware do I need?_ Please see where to start on the building ns web page: http://www.isi.edu/nsnam/ns/ns-build.html#start. * _What should I do if I have trouble downloading/extracting ns?_ This question is answered in detail at http://www.isi.edu/nsnam/ns/ns-problems.html#downloading. * _What should I do if I encounter problems building ns?_ Check: 1. the README that comes in the distribution (very brief), 2. the installation problems, bug fixes and help web page http://www.isi.edu/nsnam/ns/ns-problems.html, 3. the archives of the ns-users mailing list http://www.isi.edu/nsnam/ns/ns-lists.html, 4. post a bug report (see below) http://www.isi.edu/cgi-bin/nsnam/reportbug.cgi. * _What do I do after I successfully build ns?_ + Put the path to your ns executable into your PATH environment + Put the path to your otcl into your LD_LIBRARY_PATH environment + Put the path to your tcl library into your TCL_LIBRARY environment * _Where can I find documentation for ns?_ All documentation is linked from the main ns web page http://www.isi.edu/nsnam/ns/. Documentation includes a tutorial (originally from Marc Greis) and a reference manual (ns notes and documentation). * _Words, words, words... that documentation is nice, but where are some sample scripts I can start from?_ Many sample scripts can be found in the ns distribution in ~ns-2/tcl/ex and ~ns-2/tcl/test. * _What protocols does ns support?_ A lot! Almost all variants of TCP, several forms of multicast, wired networking, several ad hoc routing protocols and propagation models (but not cellular phones), data diffusion, satellite, and other stuff. See the documentation (described above) for details, or download ns and look. * _How do I know that ns correctly implements these protocols?_ Ns has validation tests that cover many protocols, see http://www.isi.edu/nsnam/ns/ns-tests.html. However, ultimately users are responsible for verifying that ns is accurate for their purposes---since we cannot foresee all the ways ns may be used, we cannot test all cases with all inputs. * _Are there any contributed/additional protocols not in the main distribution?_ Yes, please see the contributed code web page http://www.isi.edu/nsnam/ns/ns-contributed.html. The mailing list archives can also be helpful (see below). * _How should I get started doing something (like implementing a new protocol or trying an experiment)?_ We recommend that you look through the tutorial (see
Re: [ns] how to get used-bandwidth of a wireless node in ns
I do not know if carrying a bandwidth value inside the flow is the best solution. Bandwidth as I see is data_transmitted/time. And time is relative, are you going to measure the bandwidth in the last second, the last minute, the last hour? So that why I think is not the best way. I would suggest then to use the bytes transmitted by the flow. Get that number and divided by the time life of the flow. You can also do some more complex things such as getting the bandwidth in the last second, minute, etc. if you wanted. Regards, -as Zhao Junmin wrote: Hi everyone, I am trying to add admission control mechanism in dsr ,so I need to know a node's bandwidth which has occupied at any moment. here ,there is a method. in dsr, enable every flow to carry occupied bandwidth by itself. we can compute a node's bandwidth which has occupied through integrating all flows' occupied bandwidth which pass through the node. But,I don't know any better one,so I would like to get some advice. thanks! zhaojunmin
Re: [ns] Questions for an eavesdropping agent
李令雄 wrote: Hi all, I want to implement a monitor(or eavesdropping) agent. The agent will be set at a middle node of a transmission. It listens and operates all packets that passed through the node. Since packets are not for the middle node, the monitor agent will not get access to any packets( In NS implementation, node classifies packet by its dstIP and Port). How can we switch the pack flow to the new agent and then back to next network component ( next link,next agent...)? Which part of the NS documentation should i focus on for this question? Best Regards, Henry Lee So you mean that queuing of packets and delays in trasmision because the monitor agent should not be visible in the simulation? I have not work with the LAN modules of ns, but maybe if you set up your monitor agent in a LAN type of network you would be able to sniff packets such as in the real scenario. -as
Re: [ns] Flow-aware networking
Hi, Some time ago somebody sent this post to ns-users. I am trying to build a flow table. Each node send data (UDP or TCP) to other nodes. The simulation now is very small, just 5 or 6 nodes and I want to make a file with the information of flows over time. Basically what it is said in the e-mail: source_address, destination_address, source_port, destination_port, flowId, number of packets, avg_packet size I sorted how to get and to print in a file source_address, destination_address,flow_id, number of packet and avg packet size, but I cannot find how to get and to print the port number. Any idea in how to do get the port number of the TCP or UDP connection (flow) and to print it in a file? Thanks, -as Hi, I'm working with ns2 to make a node whose traffic control is based on conception of flow-aware networking (http://perso.rd.francetelecom.fr/oueslati/XP.html). I know how to build Queue class in c++ and how to include it in ns2. It is not a problem. The problem is that I need a value of intensity of arriving packet flow. The flow is identified by [src address, dst address, src port, dst port, type of transport protocol]. I know that when I define source I have to specify the intensity of packet emission. I know this, but I want the node to measure the arriving packet intensity (of identified flow) and return the value as a parameter to make some calculations. I was wondering about building a buffer where I could store 2 packets and estimate time between them, but it is not good solution when you have 1000 sources and you have to store 2000 packets in the system to account 1000 arrival intensities... is anyone have a idea, how to do it, how to build a class like this? I don't know but maybe ns2 has some tools to measure this time? I will be very grateful for help. With regards, Marek - Get the free Yahoo! toolbar and rest assured with the added security of spyware protection.
Re: [ns] Queue Monitor - Packet Drops
Somewhere in these three sites there is your answer: http://ns-2.blogspot.com/ http://www.isi.edu/nsnam/ns/ http://www-net.cs.umass.edu/~ratton/ns-lecture/ -as Banu Sundar wrote: Hi users, I have questions on how to monitor the packet drop between two particular links.I have used the following commands to do it. set qmon [$ns monitor-queue $n3 $n4 [open qm.out w] 0.1]; [$ns link $n3 $n4] queue-sample-timeout; At the end of simulation qm.out is created. The qm.out looks like this; 0 2 3 0 0 0 0 0 0 0 0 0.10001 2 3 0.0 0.0 0 0 0 0 0 0 0.20001 2 3 0.0 0.0 0 0 0 0 0 0 0.30004 2 3 0.0 0.0 0 0 0 0 0 0 0.40002 2 3 0.0 0.0 0 0 0 0 0 0 0.5 2 3 0.0 0.0 0 0 0 0 0 0 0.59998 2 3 0.0 0.0 18 18 0 9000 9000 0 0.69996 2 3 0.0 0.0 38 38 0 19000 19000 0 0.79993 2 3 0.0 0.0 58 58 0 29000 29000 0 0.89991 2 3 0.0 0.0 78 78 0 39000 39000 0 0.99989 2 3 0.0 0.0 98 98 0 49000 49000 0 1.0999 2 3 2990.01178 5.98002349 136 122 0 68000 61000 0 1.2 2 3 9055.04129 18.1100831 176 147 9 88000 73500 4500 1.3 2 3 9625.06312 19.2501268 216 172 24 108000 86000 12000 1.4001 2 3 9625.09095 19.250183 256 197 39 128000 98500 19500 1.5002 2 3 9625.11878 19.250238 296 222 54 148000 111000 27000 1.6003 2 3 9625.14679 19.2502938 336 247 69 168000 123500 34500 1.7004 2 3 9625.17426 19.2503489 376 272 84 188000 136000 42000 1.8005 2 3 9625.20191 19.250405 416 297 99 208000 148500 49500 1.9006 2 3 9625.2301 19.2504601 456 322 114 228000 161000 57000 I have no idea how to interpret it! Which column gives the values of packets dropped at each instant.Please please try to help me with this.It is creating a blockk in my work and I am not able to proceed further without this informations. Thanks a lot in advance, Banu Send free SMS to your Friends on Mobile from your Yahoo! Messenger. Download Now! http://messenger.yahoo.com/download.php
Re: [ns] couldn't execute nam: no such file or directory
Kuheli louha wrote:
Hi,
I am using ns-allinone-2.30. I was running the following example.tcl from
ns-allinone-2.30 using the command /home/where_i_installed ns/ns-
allinone-2.30/ns-2.30/ns example.tcl but I am getting the following error
ns: finish: couldn't execute nam: no such file or directory
while executing
exec nam out.nam
(procedure finish line 5)
invoked from within
finish
I had set by PATH variable as
/home/louhaki/NS/ns-allinone-2.28/bin:/home/louhake/NS/ns-allinone-2.28/ns-
2.30:/home/louhaki/NS/ns-allinone-2.28/nam-1.12:/usr/j2se/bin:/home/louhaki/bin:/usr/local/bin:/usr/local/gnu/bin:/usr/bin:/usr/openwin/bin:/usr/dt/bin:/usr/ccs/bin:/usr/sbin:/opt/SUNWspro/bin:/usr/sfw/bin:/usr/sbin:/usr/local/teTeX/bin
I also included the line
export PATH=/home/louhaki/NS/ns-allinone-2.28/nam-1.12
export PATH=$PATH:/home/louhaki/NS/ns-allinone-2.30/ns-2.30
/bin:/home/louhaki/NS/ns-allinone-2.30/tcl8.4.13/unix:/home/louhaki/NS/ns-
allinone-2.30/tk8.4.13/unix
in .bashrc. Yet the problem persists.Can anybody help
The file is
set ns [new Simulator]
set nf [open out.nam w]
$ns namtrace-all $nf
proc finish {} {
global ns nf
$ns flush-trace
close $nf
exec nam out.nam
exit 0
}
set n0 [$ns node]
set n1 [$ns node]
$ns duplex-link $n0 $n1 1Mb 10ms DropTail
$ns at 5.0 finish
$ns run
-
May be it is a silly question to ask (you may check this already),
but it would be the first thing that I would check.
Is nam in any of the directories that you have in your PATH?
-as
Re: [ns] question on installation NS-2.29 on Linux Ubuntu
I had the same problems in Ubuntu 6.10 and ns-2-31. I had to compile with gcc and g++ 4.0 instead of 4.1 (default in my distro). There are a couple of urls documenting this and how to install ns in ubuntu. http://thesandeep.wordpress.com/2006/12/02/installing-ns2-on-ubuntu-dapper-lts/ http://nsnam.isi.edu/nsnam/index.php/Troubleshooting#ns-2.30.2Fns-2.31_do_not_build_with_gcc.2Fg.2B.2B_4.1 -as
