(If you use GNS3 for a period of time, you may encounter this situation. That is, when you haven't finished the experiment, but there are some reasons that make the experiment impossible to continue. At this time, you may want to save the configuration of this experiment for the next experiment. But under dynamipsgui, it takes a long time to load startup config. GNS3 can meet your needs, and before the next experiment, import all startup config in 1 minute to continue the experiment. This video will demonstrate how to save running config for the next experiment)