I’ve read through a few posts and how to’s but not yet found answers to all my issues hence my post. Is is possible to simulate a Cisco 3750 switch of do I need to work with the default ethernet switch provided by GNS3? When creating a pix from an IOS, I do not see cisco 3750 Ios ImageFor Gns3 option to choose that platform: eg platform C3700 model 3725. There is no option to choose a PIX platform.
IOS for GNS3 from the following link. Last edited by buddhika01 on Thu Jan 05, 2012 10:05 am, edited 2 times in total. I’ve loaded all 3 of those IOS images and they all function correctly but I do not see any voice commands. Should I use a mainline and technology train image? GNS3 offers multiple ways to emulate IOS.
Dynamips can run unmodified IOS images. 4, there is a way to run a second category of switches and routers. Svms are housed in a virtual machine. IOS images are lower in cpu and memory so you can fit more of them in one topology. Svms are all vendor Routing and Switching images that are larger in size but can be imported into GNS3 for real world network emulation.
Important points Availability Due 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. Currently, the c7200 images are the only ones still available for download for those with a support contract. Only the c7200 series get newer IOS 15 images. You will find the technology train images to contain the newest features but it may also contain the most bugs.
We recommend Mainline over Technology train if you are interested on stability without the need of new features. The minimum RAM is the amount of memory needed for IOS to work at maximum capacity with most feature configured and activated. From experience you can usually use a bit less RAM just fine. 3640, c3660, c3725, c3745 and c7200 IOS images listed below, they have proven to be the most stable in GNS3 provided you use the right amount of RAM and Idle-PC value. This settings will help Dynamips to consume less CPU. It’s specific to each different IOS image. 7200 series 7200s have a different architecture.
VXR chassis, NPE-400 and C7200-IO-FE are the default settings in GNS3. This router series is still getting new IOS 15. This one is not the latest 12. 4 version but it is easier to find.
This is due to the impossibility to emulate ASIC processors used in those type of devices. For switching you can use IOU L2 image or vIOS L2 images with Qemu. To recap: You can import many images using Virtualbox or VMWare. If you require more switching features, it is recommended to use larger Virtual Machine Switches and Routers that run inside your choice of Qemu, Virtualbox or VMWare. Cisco IOS is an operating system by Cisco System which offer a better way to build a managable netwok interconnection, this operating system used on the vast majority of Cisco Router and Cisco Network Switch. Switch by provide a free IOS For Download. For complete instruction the way to use Cisco IOS for simulating a Cisco Router and Cisco Network Switch, see my previous article here.