* The new IOS image file is inline with the router DRAM and flash memory size. * The new IOS image file is in working condition since corrupted IOS image won't do any good To transfer an IOS from PC to ROUTER, the following conditions must meet Upgrade or Download Router IOS image to Flash Memory Once you have both old and new IOS images in USB Flash drive, you can either save copies to your computer or to some storage such as DVD, tape backups, or some FTP servers.
Need to make backup image? Or need to download image? Try the followingįor those routers or switches that have USB port, you can use USB Flash drive to backup or to download IOS images as follows When such incident happens, you will be glad that you first back up the IOS image to server before deleting working IOS image off the flash memory. * There is a chance that a router loses power or loses connection during the IOS image transfer (copy from or to server) which may cause the router to have no working IOS image to boot up from. Later description will show you how to back up the image * Under any circumstances, DO NOT delete working IOS image off the flash memory unless the image has been backed up to server (TFTP or FTP server) or you have working IOS image stored in the server. When your router is unable to boot up normally, please scroll down to the bottom of the page for suggestions. This FAQ assumes that your router is able to boot up normally.
If your equipment is Cisco 801-805 Router that uses Tiny ROM, then please use the following guide instead.Ĭisco IOS Software Upgrade Procedure for Cisco 801, 802, 803, 804, and 805 Series RoutersĢ.
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