Use the following command to upgrade IOS on a 3750 or 2960S switch stack:
archive download-sw [options] [path]
(ex. archive download-sw /no-version-check /overwrite tftp://192.168.1.1/c2960s-12.2-55.tar)
Note: You must upgrade using the .tar file of the IOS software. This command will not work with a .bin file.
For more information, review the Working with Software Images section of this doc.
