Should I use a mainline and technology train image? # Please note that the IOSv appliance is based on IOS 15 and there are IOU (IOS on UNIX) images with IOS 15. All other platforms are now end-of-life and only support IOS 12.4. Only the c7200 series get newer IOS 15 images. Currently, the c7200 images are the only ones still available for download for those with a support contract.
R+Svms are all vendor Routing and Switching images that are larger in size but can be imported into GNS3 for real world network emulation.ĭue to these platforms hitting End of Sale, End of Life, and End of Support status, the images are no longer available for download from Cisco’s support sections. IOS images are lower in cpu and memory so you can fit more of them in one topology. IOS images are usually run in Dynamips however R+Svms are housed in a virtual machine. 
What are the differences? Here are the major differences:
These are classified as Routing and Switching virtual machines (or R+Svms) for short. In the new GNS3 1.4, there is a way to run a second category of switches and routers. For older images, we use and maintain Dynamips an emulator dedicated to emulate some Cisco hardware. GNS3 offers multiple ways to emulate IOS. Configure GNS3 to use an additional remote server.How to use applications with the GNS3 Web interface.
Install an appliance from the GNS3 Marketplace. “Shutdown” shuts down the interface, while “no shutdown” brings up the interface. Sets a host name to the current Cisco network deviceĪn enable mode command that copies files from one file location to anotherĪn enable mode command that saves the active config, replacing the startup config when a Cisco network device initializesĪn enable mode command that merges the startup config with the currently active config in RAMĪn enable mode command that deletes the startup config Logs you into enable mode, which is also known as user exec mode or privileged modeĮnters interface configuration mode for the specified fast ethernet interfaceĪn exec mode command that reboots a Cisco switch or router Here is a Cisco commands cheat sheet that describes the basic commands for configuring, securing and troubleshooting Cisco network devices. The basic CLI commands for all of them are the same, which simplifies Cisco device management. Almost all Cisco devices use Cisco IOS to operate and Cisco CLI to be managed.
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