GNS3 Router Switch Simulator

I want to introduce a great tool to simulate network which is GNS3. This is a complete tool to simulate Cisco router, Cisco switch, Juniper router, Cisco ASA, and many more. By using IOS (Internetwork Operating System) which is a software that run cisco hardware you can do a lot of network simulation easily. GNS3 is a free software so you can download and run it freely. But the IOS software is  proprietary of Cisco. So you must have the license to use it. But you can find the IOS in the internet and download it.

GNS3 can be downloaded from here :

http://www.gns3.net/download/

I will tell what are the capabilities of GNS3. So you can use it for your network project simulation. Whatever is your network simulation just count on to this software. I can imagine about what will you next using this software. I think you will do a lot of network simulations using this software.

You can see the screenshot of GNS3 window below :

There are two routers which are connected via interface fastethernet. After pressing start button, we can run the simulation. By clicking the R1 router, we can enter into the exec command mode. You can see the result below :

it is a router that use IOS version 3725. And we have finished to simulate the router. By using this program, you can simulate router and switch without needing to invest on router. Although there area limitation in switch simulation. Because GNS3 can not simulate ASIC processor. Not all switch command can be simulated for examples mls qos, private vlan , dot1q tunnel, spanning tree mst, and many more. As alternative you can rental lab online. So you can get used to switch command. Because switch commands are easy to understand. Well, Get ready to your lab at home.