- 1). Enter the model of your router on Cisco's "Download Software" web page and click on the image you want among the ones presented to you. The image will download onto the computer. Make a note of the name of the file containing the image, for example "newImage.bin."
- 2). Download TFTP server software on the computer. The "Free TFTP Server" is a good, free alternative, superior to products you would have to pay for. Double click on the "1037.exe" file you downloaded; the software will install.
- 3). Connect the Ethernet cable to the computer and to the router's Ethernet interface.
- 4). Click "Start," then "Run" on the computer. Type "cmd" and press "Enter." Type "ipconfig /all" in the new window, then press "Enter." Make a note of the IP address that appears in the "Local Address" field, for example "192.168.1.32."
- 5). Start the terminal emulation software on the computer. Open a console connection to the router. Type
copy tftp flash
on the console. Answer the "Address or name of remote host" prompt with the IP address of the computer (192.168.1.32 in the example.) Answer the "Source filename" and "Destination filename" prompts with the same value: the name of the IOS image file ("newImage.bin" in the example.) Answer "N" to the "Erase flash before copying" prompt. The image will transfer from the computer onto the router. - 6). Type
config-register 0x2102
no boot system
boot system flash newImage.bin
reload
on the console, pressing "Enter" after each command and replacing "newImage.bin" by the name of the image file you downloaded from Cisco in Step 1. The router will reboot into the new image of the IOS operating system.
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