Router# copy tftp: flash: Address or name of remote host []? [Your Server IP] Source filename []? c1900-universalk9-mz.SPA.158-3.M7.bin Destination filename [c1900-universalk9-mz.SPA.158-3.M7.bin]? Use code with caution. Copied to clipboard 4. Configure the Boot Path Tell the router to use the new image upon the next restart.

Since this is a binary file often downloaded from third-party repositories or legacy backups:

: 15.8(3)M7, a "Maintenance" (M) release intended for stability and long-term support.

: The official source for downloading the .bin file, which requires a valid Cisco account and service contract. Technical Specifications for this Image