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1. Copy your firmware image to your usb drive using
your computer.
2. Plug the usb drive into your router. You should
see usbflash0:
has been inserted in the terminal prompt.
3. Run the following command to copy the IOS image
into the router’s flash:
router# copy
usbflash0:c2900-universalk9-mz.SPA.157-3.M3.bin flash0:
c2900-universalk9-mz.SPA.157-3.M3.bin
4. Verify your file is in flash by running the
command:
router# dir flash0:
5. Tell the router to boot to the new image by running
the following commands:
router# conf t boot system flash0
c2900-universalk9-mz.SPA.157-3.M3.bin exit copy run start
Also, if you’ve previously configured your router to boot to
a specific IOS file you’ll need to remove that line from your config before
reloading the device. To see what all is in your boot config run the following
command:
router# show run | begin boot
Find any erroneous boot system commands and remove them
using the “no” command followed by the erroneous config line like so:
router# conf t no boot system flash0
oldconfigfilename.bin copy run start
6. Reload your router to boot to the new image by
running the following command:
reload# reload
7. Once the router is booted back up, go ahead and
delete the old firmware image from the flash by running:
router# delete /recursive /force
flash0:c2900-universalk9-mz.SPA.156-2.M2.bin
