Chapter 15 Firmware and configuration file maintenance 193Nortel Business Secure Router 222 Configuration — Advanced2 Use Telnet from your computer to connect to the Business Secure Router andlog on. Because TFTP does not have any security checks, the Business SecureRouter records the IP address of the Telnet client and accepts TFTP requestsonly from this address.3 Put the SMT in command interpreter (CI) mode by entering 8 in Menu 24 –System Maintenance.4 Enter the command sys stdio 0 to disable the management timeout, so theTFTP transfer is not interrupted. Enter command sys stdio 5 to restore thefive-minute management timeout (default) when the file transfer is complete.5 Launch the TFTP client on your computer and connect to the Business SecureRouter. Set the transfer mode to binary before starting data transfer.6 Use the TFTP client (see the example below) to transfer files between theBusiness Secure Router and the computer. The file name for the firmware isras.Note that the telnet connection must be active and the Business Secure Routermust be in CI mode before and during the TFTP transfer. For details about TFTPcommands (see “TFTP upload command example” on page 193), consult thedocumentation of your TFTP client program. For UNIX, use get to transfer fromthe Business Secure Router to the computer, put to transfer from the computer tothe Business Secure Router, and binary to set binary transfer mode.TFTP upload command exampleThe following is an example TFTP command:tftp [-i] host put firmware.bin raswhere “i” specifies binary image transfer mode (use this mode when transferringbinary files), “host” is the Business Secure Router’s IP address and “put” transfersthe file source on the computer (firmware.bin – name of the firmware on thecomputer) to the file destination on the remote host (ras - name of the firmware onthe Business Secure Router).Commands that appear in GUI-based TFTP clients are listed earlier in thischapter.
