ZyXEL Communications VES-1000 Series, User Manual, Page: 158 / 227

VES-1000 Series Ethernet Switch
21-4 Firmware and Configuration File Maintenance
•
The IP address(es) in the Secured Client Sets menu (menu 24.11.1) does not match the client IP address. If it
does not match, the VES will disconnect the Telnet session immediately.
•
There is an SMT console session running.
21.2.6 Backup Configuration Using TFTP
The VES supports the up/downloading of the firmware and the configuration file using TFTP (Trivial File
Transfer Protocol) over LAN. Although TFTP should work over WAN as well, it is not recommended.
To use TFTP, your computer must have both telnet and TFTP clients. To backup the configuration file, follow the
procedure shown next.
1.
Use telnet from your computer to connect to the VES and log in. Because TFTP does not have any
security checks, the VES records the IP address of the telnet client and accepts TFTP requests only from
this address.
2.
Put the SMT in command interpreter (CI) mode by entering 8 in Menu 24 – System Maintenance .
3.
Enter command “sys stdio 0” to disable the SMT timeout, so the TFTP transfer will not be interrupted.
Enter command “sys stdio 5” to restore the five-minute SMT timeout (default) when the file transfer is
complete.
4.
Launch the TFTP client on your computer and connect to the VES. Set the transfer mode to binary before
starting data transfer.
5.
Use the TFTP client (see the example below) to transfer files between the VES and the computer. The file
name for the configuration file is “rom-0” (rom-zero, not capital o).
Note that the telnet connection must be active and the SMT in CI mode before and during the TFTP transfer. For
details on TFTP commands (see following example), please consult the documentation of your TFTP client
program. For UNIX, use “get” to transfer from the VES to the computer and “binary” to set binary transfer mode.
21.2.7 TFTP Command Example
The following is an example TFTP command:
tftp [-i] host get rom-0 config.rom
where “i” specifies binary image transfer mode (use this mode when transferring binary files), “host” is the VES
IP address, “get” transfers the file source on the VES-1012 (rom-0, name of the configuration file on the VES) to
the file destination on the computer and renames it config.rom.
21.2.8 GUI-based TFTP Clients
The following table describes some of the fields that you may see in GUI-based TFTP clients.