It is also known that you cannot perform an IOS upgrade from normal mode when the router uses an IOS image which runs from Flash, in this case the IOS image you are trying to upload runs from Flash, it means that you won't be able to perform an IOS upgrade when the router is up, what you have to do is to boot up the router in boot mode (change the configuration register to 2102 and reload the router) when the router boots up in Boot mode you will be able to copy the IOS image from TFTP to Flash since the Flash memory will be R/W, you can also notice this one at this point in time by doing a sh version when the router is in normal mode, you will see that the Flash memory is set to R/O because this is used for having the IOS image running, also, when the router is in boot mode you have to perform the following steps:
Once the IOS image has been uploaded you have to set the configuration register to 2102 again, please be aware to avoid saving the changes when the router is in boot mode because it can erase your whole configuration, then you only have to change the config-register to 0x2102, if the you are prompted to save the configuration type NO and reload the router.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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