Blog Archives

Cisco iOS Emulator Hardware and Software Simulations

Good article with introductory discussion:
http://www.techrepublic.com/blog/networking/practice-cisco-router-configuration-using-a-free-emulator/419

Supported Hardware

Dynagen/Dynamips:
Cisco 7200, Cisco 3600 series (3620, 3640 and 3660), 3700 series (3725, 3745) and 2600 series (2610 to 2650XM, 2691).

Emulators/Simulators

Dynagen/Dynamips (excellent choice and good for windows and *nix):
http://www.gns3.net/download
http://www.ipflow.utc.fr/index.php/Cisco_7200_Simulator
http://dynagen.org/tutorial.htm

Boson (proprietary at least 100USD$):
http://www.boson.com/AboutNetSim.html

pyios (not as much following as the other two):
http://sourceforge.net/projects/pyios/

Quick Cisco IOS Reference

As a general word of caution, if you have no experience with Cisco or other CLI based router admin (such as linux and red hat derivatives), I would not recommend diving in unless you have a lot of spare time on your hands in the event that you accidentally delete all routing tables or cause other serious problems!

Even in a professional business environment, due to some differences between IOS and hardware versions and the need to reboot for some settings to take effect, it’s always a good idea to perform changes after hours when critical business operations will not be interrupted by internet or service downtime.

Official Cisco IOS Manual, http://www.cisco.com/en/US/docs/ios/12_3/featlist/sec_vcg.html

Manipulate NAT and other general help references and top hits on Google for common Cisco beginner questions:
http://www.nthelp.com/handy_cisco.htm
http://www.loeppenthien.dk/Network_IOS.asp
http://www.simulationexams.com/tutorials/ccna/cisco-ios.htm
http://www.networkclue.com/routing/Cisco/IOS/index.aspx
http://www.oreillynet.com/pub/a/network/2002/01/02/ciscotips.html
http://portforward.com/english/routers/port_forwarding/Cisco/Cisco800Series/default.htm