Re: [ns] measuring various parameters in ns
You have to parse the trace file. Use awk or perl and you can google for some scripts. ggeorgak On Sunday 27 August 2006 21:48, Aritra Das wrote: hi i am simulating an wireless scenario in ns. i want to get the packet delivery ratio, total number of routing packets transmiited, total number of data packets transmitted, end to end delay at the ned of the simulation, preferably printed to a file. can anyone please help me how to get these. thanks in advance Aritra Das
[ns] Wireless God
I'm trying to use the God::instance()-IsReachable(node1,node2) method and the simulation stops saying God is off. How can I turn God on? ggeorgak
Re: [ns] Wireless God
Ok, don't bother: set $god [create-god 2] $god on ggeorgak On Wednesday 23 August 2006 13:07, Giorgis Georgakoudis wrote: I'm trying to use the God::instance()-IsReachable(node1,node2) method and the simulation stops saying God is off. How can I turn God on? ggeorgak
[ns] ns ftp
From what I see there is no ftp implementation in ns, more precisely what seems like ftp application is a tcl Application/FTP object that the only thing it does is to send packets through a tcp connection. So is there a real ftp implementation that complies to the standard? ggeorgak
Re: [ns] ns ftp
On Wednesday 23 August 2006 16:21, Pedro Fortuna wrote: No, not that I know. But it shouldnt be too hard to extend the existing one... OK you are definitely kidding, have you seen the rfc specification of FTP? At least for me hard is not defined by how mind challenging is a task but by the time it consumes, and my estimate is that it needs considerable time to have an FTP implementation. Especially since we are talking on an abandoned project like ns. I am considering moving my simulations to PlanetLab and waiting for the arrival of Internet2 but I am hugely disappointed by the potential not exploited of ns. At least when I see an Application/FTP interface I am expecting to do what it says. If I hadn't checked the source code deviating from my main work I wouldn't know ( and it's bad not to deliver what you promiss). ggeorgak On 8/23/06, Giorgis Georgakoudis [EMAIL PROTECTED] wrote: From what I see there is no ftp implementation in ns, more precisely what seems like ftp application is a tcl Application/FTP object that the only thing it does is to send packets through a tcp connection. So is there a real ftp implementation that complies to the standard? ggeorgak
Re: [ns] ns ftp
I am sorry for the aggresiveness of my mail. The free implementation is too unreliable for what I am trying to do as I want very accurate results. The use of emulation is possible but still there are better ways to do it (PlanetLab). As for the open-source spirit you are completely right. I apologize again, it was in the spur of the moment. ggeorgak On Wednesday 23 August 2006 16:56, you wrote: You have to understand that not everyone has the same requirements you have. Very few ppl would need a complete and rigorous implementation of FTP in NS. Many don't even care if it is FTP at all... they just want to drive a continuous flow of tcp traffic through the simulated scenario. When you do some simulations, you do not need to implement everything, you just need to figure out what is important for your studies. There's two things that come to mind that you could probably do. 1) adapt a free implementation of FTP to a new Application/FTP source and sink 2) use real FTP traffic (NS2 can be made to bridge between two real life FTP applications). I'm not saying that those are easy to accomplish, but they are certainly feasible. As for the unmaintainability of NS, I share your concerns, but there's nothing we can do except to contribute. That's the spirit of open-source. In the meanwhile, NS3 is being planed and will be available some day. Best Regards, Pedro Fortuna INESC Porto
Re: [ns] Multiple UDP traffic generator to one UDP source
Perhaps I didn't express it right. I have two sources and one sink. The sources send data packets to the sink and the sink must ack the packets to each the source. The problem is that UDP agent can handle only one connection between source and sink so the ack packets are only transmitted to one source (the last one for which $ns connect $udpsource $udpsink has been called for). Has anybody already solved that problem? Another issue is that there is no sendto() method defined for UDP agent and not for its parent agent too which partially could solve the problem by changing the default recv() method of UDP Agent to provide a sender ns_addr_t to the application. If anybody has worked this out please reply to me. ggeorgak On Tuesday 22 August 2006 00:19, amin nazaran wrote: Dear Giorgis I think your Channel do not transmit the data to specified sink when you have 2 sink with one share node it is better that you defined two sources ,then connect each source to spesified sink , I think, it is not possible that you connect two udp agent to each other, , you must connect udp agent to sink, your Definition have problems. On 8/21/06, Giorgis Georgakoudis [EMAIL PROTECTED] wrote: I builded a very simple app on top of the UDP agent of ns and the problem is that if I have two traffic generators both can send to the UDP agent of the traffic sink but when the sink is sending the ack (my application) the ack is send to the last node for which the $ns connect $udpAgent1 $udpAgent2 has been called. How can I correct that?
Re: [ns] Help to learn tcl/ex/*.tcl
Be more specific on the errors you get. ggeorgak On Monday 21 August 2006 08:36, S.Thanga Prakash wrote: hi all, I am trying to execute example tcl scripts. But, i am getting errors on execution. how to start the execution of these examples? thanks in advance, regards, stp.
Re: [ns] Installation Problem
What exactly is the problem? Did u check the installation troubleshooting at nsnam website? On Sunday 20 August 2006 11:33, Harish Kumar wrote: hi all, Can any body tell me, issues regarding implementing Ns-2.29 all in one package on Red Hat Enterprise Linux Ver 4 Update 2. I am not able to install it..But i was able to install on Red Hat Linux 9.0 thanx Harish Kumar - Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail Beta.
[ns] Multiple UDP traffic generator to one UDP source
I builded a very simple app on top of the UDP agent of ns and the problem is that if I have two traffic generators both can send to the UDP agent of the traffic sink but when the sink is sending the ack (my application) the ack is send to the last node for which the $ns connect $udpAgent1 $udpAgent2 has been called. How can I correct that?
[ns] FTP protocol
Where is the ftp protocol implemented? There is a baytcp folder where ftp source files exist and create a class Agent/BayTcp/FTPClient and server respectively, what's the difference between that and an Application/FTP class (which by the way can't find where it is implemented)? From what I understand the BayTCP is both ways tcp, whereas the Agent/TCP where Application/FTP relies not is not(?). If I am right how is the 3-way HS implemented? I know things are slow on the list as it is summer and stuff but I would really appreciate some help. best regards, ggeorgak
[ns] RESENT: Determine if there is connectivity in wireless
Is there way to determine if there is connectivity in a wireless simulation
because I want to do somethink similar to:
while(!network_up()) { //waiting}
ggeorgak
[ns] Determine if there is connectivity in wireless
Is there way to determine if there is connectivity in a wireless simulation
because I want to do somethink similar to:
while(!network_up()) { //waiting}
ggeorgak
Re: [ns] what should I use to connect nodes in wireless:
Just connect the source/sink agents and when there is connectivity a wireless channel is available automatically. ggeorgak On Monday 14 August 2006 22:32, Mohadig Rousstia wrote: hi Sandeep, you can take a look at this folder, for wireless: .ns-2.29\tcl\ex\wireless-demo-csci694.tcl then compare with tcl\ex\simple.tcl for the wired link. regards Mohadig Widha Sandeep [EMAIL PROTECTED] wrote: Hello all, duplex-link , make-lan dont work in wireless scenario (according to some). Then what should I use to connect nodes in wireless. Thank u for any help, Sandeep. - Do you Yahoo!? Next-gen email? Have it all with the all-new Yahoo! Mail Beta.
[ns] ns - nam validation failed
System configuration: - gcc version 3.4.6 - tcl-8.4.9 - tk-8.4.9 - otcl-1.11 - tclcl-1.17 - http://www.isi.edu/nsnam/dist/daily/nam-1-20060724.tar.gz (nam daily snapshot) - http://www.isi.edu/nsnam/dist/daily/ns-2-20060724.tar.gz (ns daily snapshot) I'm getting this failure after building and validating ns: http://pastebin.com/756197 http://pastebin.com/756277 I'm getting this failures after building and validating nam: validate overall report: some tests failed: /test-all-ptp ./test-all-lan ./test-all-wireless Help would be much appreciated.
[ns] Wireless Simulation questions
I am getting myself familiar with ns v2.29 and I have some questions on wireless simulations. I see that there are parameters defining Antenna type, propagation model, physics, routing protocol, MAC type etc. Where is the channel bandwidth defined and the range of communication for the mobile nodes?
[ns] Protocol Questions
As far I have seen that there is the FTP protocol on the Application layer, is the HTTP protocol included too? And is there a DHCP protocol simulation on ns?
Re: [ns] Wireless Simulation questions
Every time I run a wireless simulation I get: channel.cc:sendUp - Calc highestAntennaZ_ and distCST_ highestAntennaZ_ = 1.5, distCST_ = 550.0 What do highestAntennaZ_ and distCST_ mean? Giorgis Georgakoudis
