Cisco – GNS3 Graphical router emulation software
Posted by Josh on Sun 16 Dec 2007Categories: Cisco , Dynamips , GNS3 - [151] Comments
Throughout this year, I have posted several tutorials on dynamips and dynagen. I have never really had a reason to try anything different, basically because dynagen just works. However, because of a request a few weeks ago, I branched out and tried GNS3.
GNS3 stands for Graphical Network Simulator. It is developed by a team of individuals from all over the world. I have to say, I was very impressed with my first run. Unlike other dynamips graphical front-ends, GNS3 just makes sense and it is strongly linked with dynagen. Anything you have learned about dynagen can be used with GNS3. Note: You will need your own IOS image to run GNS3.
Anyways, I will stop yapping and get to the video. Enjoy!
(the video does not have audio with it … sorry)
December 17th, 2007 at 8:25 pm
I love it… Thanks… I would love to see more advanced tutorials using GNS3… it’s just simply so much more convenient… I really like all your past tutorials as well… I wish there was a way to use Dynagen’s .net files in GNS3… that would be perfect…
January 7th, 2008 at 12:35 pm
Hi,
Can you please let us know the process of installing the GNS3 on linux (ubuntu)?
January 18th, 2008 at 9:35 pm
This is great stuff !!!!!1
I was really searching for this.
Many many thanks !
One query: Is there any way to reload a router using “reload” command ?
January 21st, 2008 at 9:23 pm
I am really glad this tutorial has helped.
Salmon,
You’re welcome. You can see similarities if you look at the dynagen config files but I agree, it would be nice if they could be imported.
Dev,
GNS3 for Linux is one of the next tutorials on the list.
Dulan,
I have not tried to reload a virtual router in GNS3, but if it is like dynagen, the reload command just takes the virtual router down. I don’t think it actually brings it up again.
January 31st, 2008 at 1:51 am
Great staff more espicially for people using windods. Is it possible to update it to work with vista as it is not working will with this ver. of windows?
February 1st, 2008 at 5:13 am
This is the one that made my GNS3 installation worked. Thanks for making this video tutorial. Now I’m simulating my network for CCNA reviews.
February 4th, 2008 at 1:04 am
[...] GNS3 Graphical router emulation software [...]
February 5th, 2008 at 8:19 am
Utterly fantastic!
Bravo Zulu
February 6th, 2008 at 1:42 am
thanx admin guy,
really a cool stuff , it save my time and effort and u guys helped me a lot towards my ccnp
March 5th, 2008 at 5:49 am
Hi,
When i am trying to install it it will install but I am not able to find the IOS image file. Please help
March 5th, 2008 at 12:01 pm
Ranjit,
I did not make this clear. You will need to obtain your own IOS image. Some people have reported good luck finding images on bit-torrent sites. Others have been using IOSHunter software. Most probably get an image from the company they work for or a client that purchased the image for one of their routers.
Josh
March 6th, 2008 at 2:02 am
Thank you very much! It helps me to prepare for Cisco exam. Really appreciate your work.
March 10th, 2008 at 5:10 pm
great work man!!!! this is very helpful to us all aspiring CCNA and CCNP dudes. Thanks very much!
March 11th, 2008 at 12:42 am
Thanks guys. I am excited to hear that the site has helped you further your education and get your certs.
March 14th, 2008 at 8:38 am
its really a good tool for my CCNP, however when even i configure a network of routers and want to same it. It get saved, but when i load it back all the configuration i did is missing and i get some wierd uni error for the same. Moreover i cant load the sample labs in it. can some one help me on this.
March 28th, 2008 at 9:33 am
Not sure if I am doing this correctly, but when I try to start the console session it opens the telnet window but just sits there. I can not do anything, hitting enter doesn’t work. Not sure if I was supposed to change something on the console port or not. Could someone help me out, please. Thanks, Brandon
March 28th, 2008 at 9:40 am
Here is what the Telnet localhost window has in it……
Connected to Dynamips VM “R2″ (ID 1, type c2600) – Console port
nothing… I can’t seem to get the console to work properly. Could someone please help. Thanks, Brandon
April 1st, 2008 at 4:17 pm
hello,
I have installed the last version of GNS, when I drag the Router. it informs me: Please test the path to dynamips in Preferences. Could someone please help me.
Thanks
April 1st, 2008 at 6:28 pm
Hi Mamri;
I think you need to click Edit> IOS Images and Hypervisors to add an IOS Image to GNS3.
Then select the IOS image you want. If you look the Tutorial it explains clearly.
Regards
Ali
April 16th, 2008 at 4:34 am
Really, really cool stuff! Tried GNS3 on my Vista OS. Had some issues initially but took a little time to figure it out and had it running eventually. My experience is to disable User Account Control and now I can even access my routers from CMD prompt. Thanks a lot GNS3 team. I must admit my experience with Dynamips/Dynagen really helps, but with GNS3, it makes a lot easier to set things up in no time.
April 16th, 2008 at 9:39 am
Same problem as 17. It seems GNS3 chooses IOS feature set. Those IP PLUS works well but advance services doesn’t work. I’m stuck on the console.
April 18th, 2008 at 6:20 am
Thanks so much for doing this!
April 19th, 2008 at 2:37 pm
I’ve tried using GNS3 but have had no success running it. I’ve spent the past two hours trying to get it to work with no success. Please help me!
Here is what I did:
1. I installed GNS3
2. I launched the Dynamips Server command prompt file
3. I went into GNS3 and added my Cisco 2600′s IOS
4. I dragged the Cisco 2600 router into the white background and I right-clicked the router and clicked start. The light of the router turned green so it turned on.
5. I right-clicked the router and clicked console, but then it says “file not found”.
What am I doing wrong? If anyone knows please help. Thank you.
April 20th, 2008 at 1:21 am
@CM, I am not sure what the problem is. Just from what you explained here, it sounds like the software used to access the router’s console cannot be found.
Try the following tutorial to use putty for console access.
http://www.blindhog.net/gns3-how-to-use-putty-for-console-access/
Josh
April 21st, 2008 at 3:03 am
very nice job, GNS3 team, but i have a little problem similar to 23.
iwent tru d following steps:
. I installed GNS3
2. I launched the Dynamips Server command prompt file
3. I went into GNS3 and added my Cisco 7200’s IOS
4. I dragged the Cisco 7200 router into the white background and I right-clicked the router and clicked start. The light of the router turned green so it turned on.
5. I right-clicked the router and clicked console, but then it says “windows cannot find telnet.make sure you typed the name correctly and try again”.
somebody please help me out,its really urgent and important..thank you guys.
April 21st, 2008 at 6:08 am
@Ty – look at the comment above. I have another tutorial for using putty instead. – Josh
April 21st, 2008 at 10:52 am
Hello Josh,
I tried what you said with the Putty tutorial but it doesn’t work! It still brings up the same message. Could Windows Vista be the problem? I have firewall disabled.
April 21st, 2008 at 11:28 pm
@Ty and @CM,
If either of you are willing to setup a logmein or webex session, I will take a look at this problem with you. If not, you might check the forums at http://7200emu.hacki.at
Josh
April 21st, 2008 at 11:42 pm
video
April 21st, 2008 at 11:43 pm
very good application
April 23rd, 2008 at 4:09 pm
Telnet is not installed by default in Windows Vista. I used Putty instead.
Telnet can be installed using the control panel. Click on “Programs” then on “Turn Windows features on or off”. Find Telnet in the list and install it.
Putty does the trick for me though…
April 27th, 2008 at 2:05 am
Dear Brandon & Denn were you able to resolve the issue you were facing..please help me because im also facing the same issue
“Connected to Dynamips VM “R2″ (ID 1, type c2600) – Console port”
but nothing is happening after that
please help me
April 28th, 2008 at 8:52 am
i just download some tutoriel
April 28th, 2008 at 12:12 pm
Dear Anand ,Brandon & Denn were you able to resolve the issue you were facing..please help me because im also facing the same issue
“Connected to Dynamips VM “R2″ (ID 1, type c7200) – Console port”
but nothing is happening after that
please help me
April 28th, 2008 at 10:58 pm
Anand, Brandon, Denn & usman,
You might take a look at this link … I haven’t experienced the issue.
http://7200emu.hacki.at/viewtopic.php?t=5872&highlight=connected+dynamips++%E2%80%9Cr2%E2%80%B3
Josh
April 29th, 2008 at 8:29 am
I just realized that there is no need to turn off User Account Control in Vista since I was accessing my routers from DOS prompt. Just run GNS3 as administrator and you are all set. My bad! I’m looking at my simple MPLS topology and I’m very satisfied.
May 2nd, 2008 at 6:19 am
I watched Cisco – GNS3 Graphical router emulation software tutorial after installing DNS3-0.5-win32-all-in-one.exe on XP Pro pc. The tutorial is concise and fantastic but I could not get my GNS3 to work.
First I started my Dynamips Server (dos windows stayed open until I closed). I then start my GNS3 and went on to add c3640-js-mz.122-8.T.bin and other things stated in the tutorial. I tried to create the same as the tutorial but I noticed that I did not have Emulation Mode buttion on my toolbar menu. So, I could not do this step. I tried to start the router but no success.
Please help me because I need this to work so I can practice for my CCNA exam in two weeks. Does anyone has any suggestions?
Thanks in advance,
Frank.
May 2nd, 2008 at 10:19 pm
thxxxxxxxxx in advance
May 8th, 2008 at 7:50 pm
I am experiencing the same issue as others who attempted to run GNS3-0.5-win32-all-in-one.exe on Vista. It starts okay but I don’t get the emulation button so I get an error message stating “file not found”. Please help!
May 10th, 2008 at 1:06 am
@Reggie,
The problem is that telnet.exe cannot be found. Follow this tutorial to use putty for console access instead of telnet.
May 16th, 2008 at 3:20 am
Thanks a LOT!!!
May 17th, 2008 at 5:53 am
I have aproblem in turning or working with the Switch, any one knows how to work with Switch in GNS3
May 19th, 2008 at 2:00 pm
Where do you get putty from and there is no emulation mode in the gns3 that I downloaded from. Also cannot get a idelpac to work, says it cannot find it. Yes have spent almost 2 hours getting things set up and still doesn’t work properly. Big factor is emulation mode does not appear on upper bar. Dont know what to do. Even when I click on R1 or R2 cannot right click on routers to get console mode or start mode. Configuration arrow will not go away, no matter what I do. I am getting the idea that the software on the tutorial and that which is downloaded are not the same. Features are different.
May 19th, 2008 at 10:45 pm
@Steve,
Putty Can be downloaded here: http://www.chiark.greenend.org.uk/~sgtatham/putty/
Starting with version 0.4 of GNS3, emulation mode is a thing of the past. Design and emulation mode have been combined into one mode.
You should be able to right-click on the routers to select ‘start’ though.
May 27th, 2008 at 9:57 pm
Hi There,
I’ve an identical problem as 34.
I’m running GNS3 on Vista, followed the steps and even installed the telnet client under Vista but I couldn’t access the console of the router.
First I launched the Dynamips server which its DOS window stayed open, then I started GNS3 and I tried to drag a 2600 router to get this error message: “A hypervisor is already running on port 7200, it will not be shutdown after you quit GNS3″ so i clicked on OK and then I dragged the 2600 once again, right clicked it and started it, everything looks normal but when I try to console to it, I get the DOS window with single line written: “Connected to Dynamips VM “R1″ (ID 0, type c2600) – Console port” and I can’t get anywhere from there.
Does GNS3 has any compatibility issues with Vista?
Ps: my Putty field is configured the right way in the preferences window. and I was able to access the router by using the old method using a batch file (dynamips-wxp -X -M std -t -npe-100 -p:0:C2600.. etc.)
May 28th, 2008 at 6:40 am
I suggest that if you want a network simulator, then you use packetracer by cisco, as it allows you to do most of what you want except telnet, and maybe the new packet tracer will allow you to do that. Semisim also has a network simulator, but I have not tried that. There is so much to study for any of the certifications that trying to get this one to work , is becomming a waste of time. To those who get it to work, congrats, to those who are having problems, like me, you might try the other two sources. Just a suggestion. I find it rather tiresome to have to go to 2-3 websites to get downloads for a program to work. Just my 2 cents.
May 28th, 2008 at 12:57 pm
@Steve-Even I was on the verge of giving up when things didn’t go right. But, I later found that the problem with me was, I hadn’t installed PuTTy. The video tutorial helped me.
@Others-I suggest you uninstall the old version. Clear any remaining bits of GNS3 using a cleaning software like CCleaner. Then, download and install the latest version. Go through ALL the videos and follow the instructions carefully.
Few told that once you start the console, nothing happens. Sometimes, that happens to me too. Next time you hit enter on the console when you start, take a look, if you can see an open curly brace ‘{‘ If you do, remove that using the backspace key and try hitting enter again. It should work.
Though everything works, I’ve got trouble saving the router configuration. The GUI shows up with the right connections of the routers which is saved in the .net file. I saw on the 7200hacki forum to export the configuration. Where do I enter that command? The console doesn’t seem to accept the export command
May 30th, 2008 at 9:43 am
The solution to the problem with the console opening and just siting there dead is to turn DOWN the amount of RAM allocated to the router instance. It was for me at least. I tried to setup a 3640 with 512M of ram. The gree light would show up telling me the router was running but the console port would just sit there like a black hole. Go back in, set the router up to use 256M of ram – voila, console port shows the router’s config wizard.
rough edges or not, this beats the hell out of tying together multiple hypervisors manually.
May 31st, 2008 at 7:35 am
sunny
Thanks for the info. I did download putty so I will try again. My main beef with this whole network simulator is there are too many missing pieces that are not totally described in all the sites I have been on and when you watch the tutorial, you have to go thru the whole process to find out that things have changed and there is not one bit of paper on the changes. It borders on a waste of time . Without this exchange, you would never know about the emulation change or needing putty, let alone where to find it. I find that disturbing when people are trying to pass certifications to get into the profession and are trying to learn how networks run and can’t because no one has bothered to combine everything into a website that makes sense. Everything is too scattered, and people get frustrated . I wont go any farther. Thanks for your instructions and help. Good luck to all those posting here on using this simulator and in your studies.
June 3rd, 2008 at 9:26 am
to steve: I’ve used packettracer, utterly disappointing. All of the routing protocols have limited functions… single area OSPF for instance… isn’t really useful for anyone that’s going beyond CCNA.
June 9th, 2008 at 2:00 pm
Hi:
I am not able to save routers config with GNS3. every time I open the saved file, the routers boot with out saved configuration. Any one can please help with this, as I am wasting a lot of time, and I am not able to advance and work on the advanced lab. I am stuck in configuring frame relay and ATM over and over.
Regards
June 16th, 2008 at 6:50 pm
hi folks,
I need help. I tried configured 2 router (3600) by video tutorial, but if i tried to connect to the router via cmd i can`t.
I receive this msg:
The system cannot find the file specifiled.
P
ls, can u help me?
Thank a lot
Best regards
June 16th, 2008 at 8:14 pm
ok issue resolved.
June 19th, 2008 at 3:53 pm
Hi,
I having problem looking for the emulation mode. I have already followed the procedures in the video tutorial but still in vain. I am using vista.
Please let me know how can I start working using GNS3.
June 24th, 2008 at 8:35 am
@alk1000 & @jun,
I do not use Vista, so I can’t speak from experience. However, the posts I have read on forums seem suggest that you need to run GNS3, Dynamips and the ‘Network device list’ shortcut as administrator.
Sorry I don’t have more information. Here is a link that may be helpful: http://www.sadikhov.com/forum/index.php?showtopic=107269
Josh
July 5th, 2008 at 8:54 am
My experience with GNS3 is one day but I am pleasantly surprised of what it can offer. I used to be very skeptical of any software simulation of Cisco hardware. I have my own small lab – 2651XM, PIX515, C1841, etc. My personal opinion on GNS3 is that it would be a good supplement of actual lab gears. Install GNS3 on a laptop and you can practise anywhere.
Strongly advise to use it on machine running XP Pro, unless you know the difference between XP and Vista well, like no default telnet install, admin user rights, etc. It would reduce your stress level. Lastly spend time to read the fantastic manual – ‘RTFM’. ‘Google’ is your friend.
Thank you Josh for your videos. It opens a door for me to experiment something new.
July 27th, 2008 at 9:18 pm
Thanks for your video ^^
August 2nd, 2008 at 6:27 am
i have got GNS3 from my friend, i am realy happy, and works very nicely as compare to packet tracer and boson
i would lik to than those of you participating to develope this simulator.
thanks.
August 2nd, 2008 at 9:32 pm
geezer, meodenXII & getinet,
You’re welcome.
Josh
August 3rd, 2008 at 1:31 am
i do have a difficulty to builde switching lab, please help me ,
thanks
getinet
August 3rd, 2008 at 9:34 am
thanks for the video tutorial. It really helps me a lot using gns3
August 4th, 2008 at 12:25 am
i want to use SDM with gns3 but i can’t get SDM software, is there any one can give me SDM software.
August 6th, 2008 at 7:54 am
getinet,
No.
Josh
August 7th, 2008 at 6:58 am
i want to configure all switching labs,by selecting 2960,3560, but GNS3 can’t help me,
what shall i do?
August 8th, 2008 at 7:49 pm
It is a great piece of software. I really appreciate the efforts to bring this up.
August 9th, 2008 at 7:36 pm
@getinet,
The best way to configure all switching labs is to purchase a few switches. GNS3 will allow you to use an NM-16ESW module for “some” switching labs.
However, there isn’t a switching emulator that I know of.
Josh
August 12th, 2008 at 3:45 am
I have got GNS3 from my friend, But he told me that to use GNS3 you should have a very high configuration computer. Other wise the GNS3 software will damage your processor or Ram. Please guide me and send me what configuration is needed to run that software, Any one who know what is the requirement to use this software please guide me.
August 12th, 2008 at 11:02 pm
@Samir,
I have never heard of GNS3 damaging hardware…
If it does, it is news to me. I run it on old and new computers. Windows and Linux OSs. Never had a problem.
Josh
August 13th, 2008 at 12:52 pm
thank you josh.
for replying me and now i can start my ccnp labs.
August 13th, 2008 at 10:40 pm
sameer,
Good luck on the ccnp exams!
Josh
August 14th, 2008 at 1:28 am
Dear sir
As soon as i starts my 7th and 8 th router in my lab in (ospf and BGP) my system goes hang and i never found the prompt for my 7th and 8th router meanwhile my other 6 running router responds me good all router works proparly. My system is having 1.5GB of RAM.Can anyone help me? should i go for 2GB of RAM or anyother sulution for this problem. Plz Help me……..
kishore Rajput
August 14th, 2008 at 9:28 pm
Kishore,
I would say you need more ram….
Josh
August 15th, 2008 at 2:51 pm
hello…josh this is me samir again…i m having one problem. according to your video clip i do all the step..and everything goes ok…but after doing some step as shown in video…it shows that my cpu usage is 100%….. why…it is so..? i tried to find out the reason but i am not able solve that thing..the step to solve this problem..are shown but still i cannot understand…how to do that so the solution that you are saying i have written it down…so please…read that part and tell me how to solve that issue……….other wise if i try to run that software by avoiding that 100% cpu usage part then it will may damage my system….so plaese read the statement written below and tell me how to solve that issue…….
Very important remark: by default, an instance will take 100% of the host CPU. To avoid this, please read the “idle-pc” section in the README file (http://www.ipflow.utc.fr/dynamips/README-0.2.7.txt).
To boot quickly, the preferred method is to decompress the IOS image with the “unzip” utility. It avoids to run the self-decompressing process in the emulator.
September 1st, 2008 at 12:24 am
Hello,
This morning I downloaded the GNS3-0.5-win32-all-in-one.exe and installed according to tutorial.
After doing step by step by reading tutorial, my GNS3 showed the massage “%% unknown CPU card type” “ROM; Reload requested”.
Does anybody help me to fix?
PS: I use putty.
Thanks,
voice kid
September 5th, 2008 at 4:01 pm
After downloading and installing GNS3 on my Windows Visat BE, i cant get it started ! every time i am getting the following error message ” failed to start dynamips” and when i try dragging the router inside the box it gives me the following error ” cant start dynamips on port 7200″.
i hve re install and again the same issue, on my co orporate lap top it works fine with windows XP.
Please requesting some help .
Regards,
Hassan
September 6th, 2008 at 1:19 pm
i am having the same problem
Connected to Dynamips VM “R1″ (ID 0, type c2600) – Console port
did anyone found an actula solution ?
September 7th, 2008 at 1:57 pm
Hi,
You are awesome!! you make life easy!!
Thanks
GOD bless u!!
September 8th, 2008 at 2:30 am
having the same issue port 7200 can not be started
did any one help on this issue ASAP
iam stuck on here
Thanks ton
September 23rd, 2008 at 8:09 pm
Samir,
Sorry for the late response. This is from the dynagen tutorial.
“Cisco IOS images are compressed. These compressed images will work just fine with Dynamips*, however the boot process is slowed significantly by this decompression process (just like on real routers). It is recommended that you decompress the images beforehand, so the emulator doesn’t have to. You can do this with the “unzip” utility on Linux/Unix/Cygwin as follows:
unzip -p c7200-g6ik8s-mz.124-2.T1.bin > c7200-g6ik8s-mz.124-2.T1.image”
Josh
September 23rd, 2008 at 8:38 pm
ccie.voicekid,
Here is a forum post for your message: “%% unknown CPU card type” “ROM; Reload requested”.
http://7200emu.hacki.at/viewtopic.php?t=263&highlight=unknown+cpu+card+type+rom+reload+requested
Josh
September 27th, 2008 at 3:42 pm
I’m using Vista and I cannot get the Console to start in the GNS3. I’ve turned the Windows Telnet feature on and rebooted. Can any????? Thanks
September 28th, 2008 at 10:13 am
I cannot find the IOS file after installing GNS3…though the port 7200 started fine
September 29th, 2008 at 11:19 am
sexycat,
Personally, I would recommend using putty with Windows Vista instead of telnet.
Josh
September 29th, 2008 at 11:20 am
Nabeel,
GNS3 does not come with an ios image. You will need to obtain an ios image separately from GNS3.
Josh
October 10th, 2008 at 3:54 am
no sound with video !! please help
October 10th, 2008 at 4:09 am
Salem,
Sorry, I did not include audio on this video.
Josh
November 4th, 2008 at 11:22 pm
Josh,
when i run ios images individually it runs fine but when i run two three instances nothing happens ….. why is it soo ?
i have a sufficient configuration to run the emulation
November 13th, 2008 at 7:54 am
[
i am having the same problem
Connected to Dynamips VM “R1″ (ID 0, type c2600) - Console port
did anyone found an actula solution ?
]
1. Make sure your router configuration meet the mininium RAM and Flash requirement for the IOS you are using. If still not working,
2. Use less featured IOS
PS. If you saw a dead console window, the Telnet program works, but the IOS is not loading.
November 22nd, 2008 at 5:29 am
Hi Josh,
I have winXP installed on my laptop. I installed GNS3 on my laptop and when i try to drag the router in the middle pane it says ‘cannot connect hypervisor to port 7200′. Also I found that when you click the prefernce option there is a test button . But it says fail to start dynamips. Could you guide me what exactly need to be done.
Kind Regards
November 26th, 2008 at 7:17 am
Taha,
Try rebooting your PC.
Josh
December 23rd, 2008 at 4:06 am
Can anyone tell me – WHAT WILL BE THE IDEAL PC HARDWARE CONFIGURATION FOR RUNNING CCIE LEVEL LABs ON THE PC ? -what should be the processor(with SPEED) ?, RAM requirement etc AND HOW MANY ROUTERs CAN BE WORKED WITH SIMULTANIOUSLY IN A GNS3 SESSION ?
December 23rd, 2008 at 4:11 am
Taha,
The path of the FOLDER of the IOS may be faulty.
1.Go to Preference. – From EDIT tab
2.Select the proper path for the IOS.
– I think it will work.
January 2nd, 2009 at 4:43 am
Need help on this issue please:
1. I installed GNS3-all-in one on windows vista
2 I loaded IOS for 7200 and 3600.
3. I dragged the Cisco 3600 router into the white background and I right-clicked the router and clicked start. The light of the router turned green so it turned on for some time and went off, then I got this prompt “209-unable to start VM instance”
What am I doing wrong? If anyone knows please help. Thank you.
Kachi
January 5th, 2009 at 8:40 pm
ss,
It really depends on what you want to do, what you are willing to deal with in terms of speed and how much money you have.
Get the fastest processor and the most ram you are willing to spend the money on.
Josh
January 5th, 2009 at 8:49 pm
Kachi,
The “Error: 209″ means the path or the name of the IOS is not correct.
I found the following explanation here
!——————————————————-!
“Try putting the IOS somewhere simple like in ‘c:\cisco’.
Try making the IOS name simple like ‘ios.bin’.
Also make sure you’ve disabled ‘hide extension for known file types’ under your folder options. Perhaps you’re not seeing the full filename.
Just some basic troubleshooting steps to follow.
_________________
Con Spathas – CCIE #19226″
!——————————————————-!
January 6th, 2009 at 5:09 am
hi i using gns3 . It is working nicely when configuring teh router or switch. But I am not able to cofigure decorative device (computer,servers etc)
January 8th, 2009 at 6:26 pm
Thanks Josh, i have solved the problem, i installed it on win xp, it worked perfectly, i then used the same procedure for vista, did dynamips test from prefernce. the only issue i have now is the console start up. i have all the tutorials on that and will try to solve that today.
January 19th, 2009 at 5:51 am
Hi
As soon I as I start the emulasion and console to the routers I get this
*******
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
Queued messages:
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
Queued messages:
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
Queued messages:
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
over and over
***********
any idea what this is and why it’s causing this?
February 8th, 2009 at 3:01 am
I install the GNS3 on my pc , and i not found the emulation mode tools on task .
please anyone help me because i need it quickly .
February 10th, 2009 at 8:50 am
I also have the problem where afet the telnet window opens it just sits there. Telnet is running. I also tried putty and same thing windown opens and just sits there. Seems that this happens with vista. I am running GNS3 and Dynamips as admin, I am also running Putty as Admin.. is there any else I can try?
February 17th, 2009 at 9:44 pm
@Mamri, comment #18
Under Ubuntu linux, I got the same message “Please test the path to Dynamips in preferences”. The tutorial I was following missed a step on the preferences screen where I chose a path to the Danamips binary executable. There is a button called “test”; click that once and then a message appears telling you if the binary worked or not.
apparently the test is required before you are allowed to attempt to run a router.
February 21st, 2009 at 4:30 am
Connected to Dynamips VM “R0″ (ID 0, type c1700) – Console port
and nothing happens anyone found a solution for this? Vista 64bit 8giga ram..
I’ve tried increase the allocated memory not helping….
February 22nd, 2009 at 6:20 am
I have found the solution for the problem above, since i did not read the manual (i dont know if it’s mention it) i was using a 828 IOS for the router above (1700) in the GNS3 and it could not start it, as soon as i downloaded a bunch of IOS (God bless torrent) and assign a proper IOS i was able to boot it up.
So it seems you have to assign a proper IOS to the drevice otherwise it wont work (i though it would work, dont ask me why)
February 24th, 2009 at 9:54 pm
Hedgehunter,
Thank you for the feedback!
Josh
March 4th, 2009 at 10:57 am
A word of praise for the Development Team – your clever View | Docks | Topology Summary feature is greatly appreciated, especially the way it can snap into place when required. It is the “little things” like this which really do make the difference between “user-friendly” and “user-hostile” applications.
March 5th, 2009 at 10:05 pm
plz any one can help me plz contact with me in this mail i have problem after i make topolgy and run it and run console the error message appear “the system cant find the specified file” thanks for all
March 12th, 2009 at 5:05 am
roma,
You are most likely using windows vista. The file vista is not able to find is ‘telnet.exe’.
Use this tutorial
http://www.blindhog.net/gns3-how-to-use-putty-for-console-access/
Josh
April 19th, 2009 at 5:37 am
dear team
i am planing upgrade my pc tell how much ram require????
please reply
April 19th, 2009 at 8:31 am
vipul,
As much as you can afford. I used to say 2GB was enough but I would say 4GB is the starting point.
Josh
April 21st, 2009 at 2:13 pm
Very user friendly and Straightforward guide.
Thank you very much.
April 26th, 2009 at 2:14 pm
How do I add a host(computer) to a topology?
April 28th, 2009 at 4:33 am
hey all,
I need help connecting a router to real world….. whenever i try pinging 192.168.1.1 which is my default gateway…. it fails
please help or give a video link that may help me to solve this problem.
thanks
April 29th, 2009 at 5:45 am
it s excellent ,
but i want to know basic configuration on GNS3
simmulator. i have 12.2 ios
please give me the configuration part
August 18th, 2009 at 7:40 pm
Hello,
Thanks for this tutorial.Excellent work.Got me started easily.Thanks a lot.
Cheers
August 21st, 2009 at 6:54 pm
This is great tutorial guide. I will definitely recommend it to everyone.
September 17th, 2009 at 1:30 am
thanks for gns3….
i installed gns3 emulation but when i select router and drop it shows an alert ‘please test the path to Dynamips in preference’.
Any one show me the way
September 18th, 2009 at 8:42 pm
Hi,
need help. using windows vista home edition. I tried configured routers (3600 and 7200 ) by consol , also installed telnet client but I receive this msg:
The system cannot find the file specifiled.
pls help
November 13th, 2009 at 6:57 am
Dear Brothers
I’m facing problem in installing GNS3 software.
After intallation and install the ios image and testing dynamips, I open the console it said ” Wrong software for this hardware” …
My RAM is 256 MB, my mother board is AMD Duron and my operating system is XP. I installthe GNS# as the tutorial above.
November 21st, 2009 at 8:07 pm
Hi,
I need your help plz, i added NM-16ESW to the 3640 router; Unfortunately it displays a msg ” you must use manual mode when adding a link to NM-16ESW “, i searched the net for a solution and i found that i must enable it through the gui settings ” edit – prefrences – GUI settings – always use manual mode “; i made the changes but no luck, i cant see the module loaded niether i can configure it. please advise …
thanks
November 26th, 2009 at 3:37 pm
Mahdi,
Try to use the 3725 image (C3725-adventerprisek9-mz.124.15.T5.bin) for NM-16ESW, that is on the 3700 router instead of 3640.
NM-16ESW comes with 16 switched d ports, your interfaces must connect to one of them (Fa1/0 to fa1/15). The manual mode message isnt an issue, I’m sure ur module is loaded, hover your mouse over the router in the design window and u’ll see a list of interfaces. Click on “add a link” on the toolbar (select Serial or Fe), then click on the router and select the port you wish to connect to. Do not forget to right click router and run Idle PC while you are in config mode. Very key if you are running Windows.
November 27th, 2009 at 11:49 am
Dear Lagosmet,
Thank you for your reply and for helping me, my issue is solved using the (C3725-adventerprisek9-mz.124.15.T5.bin);
I discovered that the image i was using (c3640-p7-mz.122-4.T3.bin) in the lab does not support that module , again thank you for your support.
Kind Regards,
mahdi
December 4th, 2009 at 11:16 am
Hi,
I have some time ago using your software and I want to THANK YOU for your work. Really nice tool for practicing and testing purpouses.
Waiting for version that supports catalyst switches
Very very THANKS again!!
December 6th, 2009 at 5:01 am
I am unable to run Dynamips.
After installing GNS3 when going to Edit>Preferences>Dynamips>Test its says “Failed to start Dynamips”.
Steps already taken :-
1. Tried to start the dynamips.
2. Have also added gns3.exe and dynamips.exe in Firewall exceptions and udp port 7200.
3. Restarted Firewall Services.
4. When tried to start dynamips it says Hypervisor: unable to create TCP sockets.
Please help me out. I have spent lot of time in resolving this issue.
Puneet
December 6th, 2009 at 5:24 am
Also when i try to drag the router in the middle pane it says ‘cannot connect hypervisor to port 7200′. Have also tried restated laptop. Already tried several times re-installing the GNS3 software.
Thanx,
Puneet
December 12th, 2009 at 12:53 am
I installed GNS3 0.7 RC1, added the IOS, I drag the Router, Hypervisor Manager says “Can’t Start Dynamips on port 7200″, I disabled my Firewall & Antivirus, still there same, I checked –> Edit –> Preferences –> Dynamips –> Test “Failed to Start Dynamips”
What do I need to start configuring my router
Thanks
eppernito@gmail.com
—————————————–
December 17th, 2009 at 5:52 pm
I installed GNS3 0.7 RC1, added the IOS, I drag the Router, HypervisorManager says “Can’t Start Dynamips on port 7200″, I disabled my Firewall &Antivirus, still there same, I checked –> Edit –> Preferences –> Dynamips –> Test “Failed to Start Dynamips”What do I need to start configuring my router
Thanks
January 2nd, 2010 at 8:12 am
I have installed GNS3, its working fine but when i console the router it say,”C:\program files\ putty\putty.exe-telnet localhost2000.The system cannot find the file specified”.
I also got error message in dynagen when i telent the router it says, windows cannot find telnet.
Please help me.
January 18th, 2010 at 11:26 am
Can I use GNS3 to achieve my CCIE?
January 21st, 2010 at 10:42 pm
Hi
1. While testing Dynamips getting message”Failed to start Dynamips”
2. When starting router “cant start dynamips on port 7200″
Please assist. Thanks in advance for any assistance.
January 21st, 2010 at 10:44 pm
Using OS windows 7.
January 24th, 2010 at 3:37 pm
Bloody good stuff,
Keep up the good work
January 24th, 2010 at 11:57 pm
Vijay,
Make sure your path to the dynamips executable is accurate.
Josh
January 28th, 2010 at 3:11 am
The console problem is due to incorrect path to putty. Just go to preference on GNS3,General(new version) or Dynamips(older version),then check out the path in the Terminal command window.e.g C:\Program Files\Putty\putty.exe -telnet %h %p. Create a folder named Putty in Program files and drop putty.exe in it. Everything should work fine (Win7 and I presume Vista too).
January 28th, 2010 at 9:16 am
For all those who can’t ping the loopback adapter on windws 7 when all else is good- the firewall issue. Control panel>System and security>Windows firewall> Advanced settings>
You’ll get the list Domain Profile, private profile and Public profile. Click on windows firewall properties under public profile to get to the Windows Firewall with Advanced Security… Then on either domain,private or public profile tab,(whichever your loopback adapter is under:by default public) click on protected network connections (Customize)and uncheck the loopback. Voila!! You can now ping successfully.
March 31st, 2010 at 12:50 pm
hi
when I drag the router in the screen it says ” HYPERVISOR IS ALREADY RUNNING ON PORT 7200″ i solved it with external hypervisor , is there any way to use from hypervisor manager again ?
thanks
March 31st, 2010 at 1:32 pm
Manie,
Kill the existing dynamips process using ‘pkill dynamips’ or windows task manager … depending on your OS.
Josh
March 31st, 2010 at 9:33 pm
After closing the GUI ,When I looked at task manager there is nothing related to Dynamips. I am usin XP sp2 . Can you tell me what is the exact name of service in task manager . Or is there any other way to solve this problem ?
Thank you so much .
April 1st, 2010 at 8:05 pm
Hi
I am sorry . you mean, (I have to close GUI and Dynamips.exe by task manager , or close the GUI with close bottom and then look for a dynamips.exe in task manager . )
I mean How to close the GNS3 ?
Thanks
April 2nd, 2010 at 12:36 am
Hi
can you simulate this problem for yourself and test your way to see it works or not? may be I am making mistake , I remeber I hit the export from file column : FILE > EXPORT , then it happened to me , or whatever way that you know to simulate this problem .
Thanks alot.
April 5th, 2010 at 9:33 pm
Hi
I remembered and I could simulate the broblem again , when I hit EXPORT / ALL option and close the GUI , when I want to create another topology , It says “HYPERVISOR IS ALREADY RUNNING ON PORT 7200″ .
Where is the problem ?
Thanks.
April 18th, 2010 at 5:15 am
Hello Everyone,
I’m facing a strange issue and hope you can help me out with it. In GNS3 I created a topology consisting of R1 connected to MS loopback adapter and R2 connected to VPCS pc where R1 & R2 are serially connected. Both routers are 7200 and running fine. After configuring everything I try to ping from/to all nodes and here’s what I get:
1- R1 pings R2/VPCS PC/MS Loopback adapter.
2- R2 pings R1/VPCS PC/MS Loopback adapter.
3- VPCS PC pings R1/R2/MS Loopback adapter.
4- MS Loopback adapter pings R1 ONLY.
I don’t know why the MS loopback adapter won’t ping other routers or pcs. It can only ping directly connected routers only. I should mention that RIP ver2 is enabled on both routers and I’m running windows 7. ICMP is enabled in windows firewall.
Please help me with this. I’d greatly appreciate any tips in resolving this.
Thanks in advance
April 19th, 2010 at 11:05 am
Hi
the problem is , when I open the GNS3 there is no process running about dynamips-wpx.exe , so obvously when I close it , I can not find any thing about dynamips-wpx.exe , because its never been excuted , now What should I do ?
Thanks.
April 19th, 2010 at 9:50 pm
Nidal,
What is the default gateway of your PC?
Josh
April 29th, 2010 at 5:00 am
Hi
As soon I as I start the emulasion and console to the routers I get this
*******
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
Queued messages:
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
Queued messages:
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
Queued messages:
Unexpected exception to CPUvector 300, PC = 80011E6C
-Traceback= 80011E6C 8048B5B0 8048B650 803A8A60 803A8DA4 80492A2C 80495FC8
over and over
***********
any idea what this is and why it’s causing this?
May 20th, 2010 at 7:04 am
Help. I am running the latest GNS3 on a Sony Vaio notebook with Windows 7 Professional using the latest Firefox browser. I am trying to get SDM 2.5 to completely work. I can get everything to work EXCEPT the Addition Task selection. My routers are the 3660. I have looked through many, many articles, web sites and videos, and still cannot find a workable solution. I have tried different versions of java and it still doesn’t allow me to select the Additional Task option. Is there anyone out there that can Help me? Please help me. I am about to give up. You can email me directly at bill.wally@gmail.com
Thanks in advance,
Bill
June 2nd, 2010 at 9:56 pm
Hi,
I would like to know how to install GNS 3.0.5 onto MAC.
I am experiencing problems pre installation!
Can anyone Rescue me from Drowning?
Help much appreciated!
June 5th, 2010 at 12:56 pm
DOES NOT HAVE AUDIO???
Website should have been named DeafHog!
June 5th, 2010 at 12:59 pm
Where the heck is the index of your tutorials and videos??????
June 13th, 2010 at 1:35 am
is it posible that i download the video about gns3 bcus i cant bo online in my hostel and my project is about designing a network with gns3?
would u pleas send it to my mail?
thanks a lot
June 17th, 2010 at 9:33 pm
Hello everybady
gns3 ina good software but i can not save configuration anybudy help me
June 20th, 2010 at 5:43 am
when i updateing my pix ios, flash is formatting , after atomatic rebooting. my pix is startes , but my telnet console not bue started, provide any solution