why did it take so long and why wasn't it around back when i was struggling with second rate router and switch sims (network simulators... you know who you are) spent a fortune on that garbage and while many of the labs and exercises were useful, they were not ios based, the command sets were horribly lacking and they were cobbled together... gave me a bad case of yuck mouth...
a few months ago i stumbled upon http://www.gns3.net/ ... for all of the struggling, poor cisco cert slaves this is manna from heaven... anyone who cannot afford their own in house lab should go immediately to this site... it is free, it utilizes real ios.bin's (although you have to scavenge them from not always reputable sources), it has a graphical topology and will packet capture in real time... it supports every protocol that the ios you've found supports... it is not a simulator, you are in fact running ios on your box...
tutorials are all over youtube, and on the internet... not only http://www.gns3.net/ , sites such as http://blindhog.net/ , et al... no more whining i can't afford the equipment, DYNAMIPS and GNS3 are here...
ok,ok... it is hardware intensive when the topology starts to get large and switch support is short, but it's ios and it doesn't cost several hundred dollars per router...
and why isn't CISCO embracing this technology, because it's a DIY threat...
anyway, the following is a great introduction to the GNS3 revolution...
use it, abuse it...
http://blog.ipexpert.com/2010/03/31/gns3-on-windows-7-the-ipexpert-way
network cisco ccna gns3 certification arteq
a network runs through it
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