Practice Cisco router configuration using a free emulator

by David Davis on June 24, 2008

Why buy a rack of routers when you can simulate one on your PC? That’s right, that is what you can do for free with Dynamips & Dynagen. These very cool Cisco router, switch, and PIX emulation products are free. All you need to provide is the IOS and a PC to run it on. For those studying for the CCNA or CCNP, this is perfect! In this article, you can learn how to download the emulator and see how to use it, step by step. This is one of David’s most popular TechRepublic articles! To read the full article, please visit: Practice Cisco router configuration using a free emulatorcisco-router-ios-emulator.jpg

{ 1 trackback }

Michael’s CCNA Success Story - How he passed the Cisco CCNA
01.12.09 at 2:27 pm

{ 10 comments… read them below or add one }

mahummed abdul fasseh 07.27.08 at 9:16 pm

am looking for a router simulor software for getting good command based knowledge about cisco routers

popoola 08.08.08 at 1:15 pm

i need a simulator that can accept all cisco configuration command just like a real router

Esau Selomane 10.29.08 at 1:28 pm

Hi mate

I am just starting out on networking and your article gave me the motivation to move forth. I have managed, without any proper training, to design and implement a medium LAN for my company, comprising of powerful servers, pcs and printers. I am also working on avocent workstations and it really is an awesome learning curve for me. My only problem is I didnt, or rather cannot implement security on my LAN, hence, the idea of a free simulator seem very appealing. I downloaded the software, but it tells me i have to have an image of the IOS software, which I have no idea where I am going to get. Is it downloadable for the internet, or need I buy it and the get an iso creating software to create the iso? I really need to practice with the out of this world gift, as I am preparing for my ccna exams come end of november. Once again, thanks a lot mate for the awfully informing articles which are the essence of this site. keep up the good work. Many thanks

Norman 12.26.08 at 6:25 am


You Mention in the article that this emulator works for PIX too?

Did You know a PIX or ASA Emulator?



Glen 01.16.09 at 11:13 am

In order to use the dynamips software, you need to have the desired Cisco IOS image on-hand. To get this, you will need to go through or authorized reseller. Or, if you have access to Cisco devices, you could pull a copy of the IOS off of the router. I’m not sure of the legalities but technically speaking it is possible.

Jason 06.26.09 at 3:20 pm

Thanks for the sim but I was wondering what types of problems some are having? The app starts fine but when you use it, it crashes a lot during console. I’ve tried this on vista and xp with the same results. Is there some weaks for the app?


dvs 12.14.09 at 4:40 am

Thanks for the sim but I was wondering what types of problems some are having? The app starts fine but when you use it, it crashes a lot during console.

siddharth 03.13.11 at 12:58 am

How to run switch ios in GNS3 ???

admin 03.15.11 at 12:03 pm

Hi Siddharth,
About using a Cisco switch in GNS3, I don’t believe it is possible. Please see this post for more information-
Hope that helps!

suraj bhure 11.17.11 at 5:30 am

hi am suraj from nagpur, i have to password break of router & create pls help me
and sent me new router configuration step by step, and about ADSL, setting

Leave a Comment

You can use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

Previous post:

Next post: