- #CURRENT CISCO IOS VERSION HOW TO#
- #CURRENT CISCO IOS VERSION SOFTWARE UPGRADE#
- #CURRENT CISCO IOS VERSION UPGRADE#
If there is a switch between the PC (the TFTP server) and the router, then also make sure both PC and router are within the same VLAN or the same broadcast domain. Easiest way is to assign a static IP to your machine. It is recommended that the PC (the TFTP server) is on the same subnet as your router. The rest of this FAQ shows the use of TFTP transfer however. Using TFTP server instead of using FTP server is more common however for image transfer. Note that when the router is running newer IOS image, IOS image transfer using FTP server is also supported.
#CURRENT CISCO IOS VERSION HOW TO#
» Cisco Forum FAQ » How to prepare TFTP/FTP server Your computer will then become TFTP server during the IOS image transfer. In order to transfer an IOS image typically you need to run a TFTP program on your computer.
#CURRENT CISCO IOS VERSION UPGRADE#
In case of unsuccessful IOS image upgrade (due to too-small DRAM size, corrupted IOS image, etc.) it is always a good to know that you are able to reverse the change by putting back the older IOS image (the one that you backup earlier) to the router
This backup should take place before any IOS image upgrade process start. * When the router is still running the older IOS image version, backup the older IOS image to TFTP or FTP server (the next steps explain this further). » Cisco Forum FAQ » Cisco equipment memory chip specification Check out the following FAQ to find memory specification Keep in mind that maximize router DRAM and flash memory size before IOS image upgrade is always a good idea to make sure the router can fit the IOS image file and can run any IOS image version. * 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.
#CURRENT CISCO IOS VERSION SOFTWARE UPGRADE#
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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