If this memory usage limit does need to be configured the screen shown in Figure 11 should be used. Putty is generally included with the GNS3 installation, but SecureCRT, Telnet and Teraterm are supported as well.įor beginning configurations, the default configuration will work fine. Once the options are correct select the save button, once this is done a screen like that shown in Figure 6 will appear.įigure 7 shows the menu item to be selected to configure GNS3 preferences. If for some reason the auto-population did not work, select the appropriate platform and model. On this screen the path to the IOS image can be selected by clicking the browse button as shown.Īs shown in Figure 5, the platform of the selected IOS image is c7200 and the only model supported is a 7200. The following group of figures will show the different steps required to set up Cisco IOS images and walk through the different preference options that can be configured when emulating Cisco IOS. There are ways to get these legally (purchase a Cisco SMARTnet contract or have an existing Cisco IOS device) and not so legally (look online) this article will not condone or approve the method used in obtaining this image.įor the purposes of this article, an image for a Cisco 7206 platform (7200) will be used. This article is a second in a series of GNS3 configuration articles that aims to make the simulation of Cisco IOS environments easier to understand and get those engineers out there looking to become Cisco IOS proficient a stepping stone.ĭynamips, dynagen and GNS3 dont include these images (this is because the legality is in question).īefore anyone can use these products, they must obtain one of these images for the platform being emulated. GNS3 added additional abilities to the dynamips platform including support for Cisco PIX and ASA as well as Junipers JunOS. GNS3 was developed to take the ease of the configuration to a whole new level this included a GUI-style interface that most people familiar with Windows based systems understood (almost anyone with a computer). To make the configuration easier, the dynagen tool was developed to provide an INI file-like configuration interface.įor most of the old school engineers out there this was familiar, and easy to figure out and configure.
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