GNS3 will allow you to start, stop and resume all the devices with just a simple click. GNS3 require a very moderate amount of CPU and memory to work and it will not crash during its operation. This program though is very easy to use but it comes with some advanced functions so you need to take some time out in order to get use to this application. You may also like to download Cisco Packet Tracer 6.1.
GNS3 1 All in One Final Overview
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