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Change Cisco Router IOS Version

Created On: 14 September 2022
Written by: Ben

On the router you are wanting to change the IOS version for copy the config to the flash: storage.

In my case I have the file on a USB pen so first I get the exact filesystem name

show file systems

Then copy the IOS from the pen to the flash storage of the router:

copy usbflash: {MYIOSNEW} flash: {NEWLOCALNAME}

Enter configuration mode:

config t

Clear all boot operations configured inside of startup-config:

no boot system

Now change the boot rom from inside of config terminal:

boot system flash {NAMEOFROM}.bin

Save the changes:

copy run start


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