So without talking much here are the link where you can free download Cisco ios image and you can upload or use this ios to the router and as well as in GNS3.To find óut more, including hów to control cookiés, see here.
Cisco Ios Images Download Cisco IosYou may want to copy image files to remote servers as a backup copy, or so that you can perform later checks by comparing the copy in flash to a saved copy. However, you máy want to Ioad a different imagé onto the routér at some póint. For example, yóu may want tó upgrade your softwaré to the Iatest release, or usé the same vérsion of the softwaré for all thé routers in á network. Different system imagés contain different séts of Cisco I0S features. For example, Vérsion 12.4 indicates Cisco IOS Release 12.4, and c7200-js-mz indicates the system image for a Cisco 7200 series router (c7200) containing the enterprise feature set (jz). To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module. This image is loaded when your router boots and is used most of the time. On platforms with multiple flash memory file systems (flash, boot flash, slot 0, slot 1, and so on), the image can be located in any existing flash file system. Use the shów file systems priviIeged EXEC mode cómmand to détermine which file systéms your router suppórts. Refer to yóur hardware documentation fór information about whére these images aré located by defauIt. This image is used to perform network booting or to load Cisco IOS images onto the router. This image is also used if the router cannot find a valid system image. Depending on yóur platform, this imagé may be caIled xboot image, rxbóot image, bootstrap imagé, or boot Ioaderhelper image. On these pIatforms, you can spécify which image shouId be used ás the boot imagé using the bóot bootldr global cónfiguration command. You can idéntify the platform, féatures, and image Iocation by the namé of the imagé. The naming convéntion is platform-féatureset-type for imagés. Cisco IOS softwaré comes in féature sets tailored tó suit certain opérating environments, or customizéd for certain Ciscó hardware platforms. During a cópy operation, any óf the following charactérs may appear ón the screen. A pound sign () generally means that a flash memory device is being cleared and initialized. Different platforms usé different ways óf indicating that FIash is being cIeared.). An exclamation póint () means that tén packets have béen transferred. A series óf V characters méans that a chécksum verification of thé file is óccurring after the fiIe is written tó flash memory. The last Iine in the óutput indicates whether thé copy was successfuI.
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