How to use linux PC as cisco router
 

I read some articles that I can use Cisco router command on my linux box to configure the box as a router. Can any one help about that providing me some kind of doc/link?

Hi,
http://www.linuxhomenetworking.com/w...nux_Networking

http://www.ipflow.utc.fr/index.php/Cisco_7200_Simulator

This is an emulator that will allow you to run a Cisco IOS on a Linux box, and use it as a router..
You will still need a Cisco IOS image, which you can not download without a Cisco Smartnet account.

Or are you looking for merely a simulator to practice on for certification ?

http://www.dynagen.org/

http://www.networkworld.com/community/?q=node/14704

i'd suggest looking at the zebra or quagga projects, they are a *very* close emulation of ios syntax, making the linux networking systems look a lot like ios.