The following directions are for installing new software on the Cisco 675 using Windows NT and TFTP client software. It's a good idea to write down your configuration before beginning, as the following procedure erases your current configuration. Login as root on the console port of the Cisco 675. Type set nvram erase , and then press Enter . Press Enter .
Type write , and press Enter .
Type reboot , and press Enter . At the prompt, login as root . Type set tftp enabled . This allows you to download a new image through the Ethernet port. After a few seconds, a byte count will start incrementing.