ZyXEL Communications B-2000 User Manual
ZyAIR B-2000 Wireless LAN Gateway with 4-Port Switch
Firmware and Configuration File Maintenance 10-5
3. The IP address in the Secured Client IP field in menu 24.11 does not match the client IP. If it does not
match, the ZyAIR will disconnect the Telnet session immediately.
4. You have an SMT console session running.
10.2.6 Backup Configuration Using TFTP
The ZyAIR 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.
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.
Step 1. Use telnet from your computer to connect to the ZyAIR and log in. Because TFTP does not have
follow the procedure shown next.
Step 1. Use telnet from your computer to connect to the ZyAIR and log in. Because TFTP does not have
any security checks, the ZyAIR records the IP address of the telnet client and accepts TFTP
requests only from this address.
requests only from this address.
Step 2. Put the SMT in command interpreter (CI) mode by entering 8 in Menu 24 – System
Maintenance.
Step 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.
the file transfer is complete.
Step 4. Launch the TFTP client on your computer and connect to the ZyAIR. Set the transfer mode to
binary before starting data transfer.
Step 5. Use the TFTP client (see the example below) to transfer files between the ZyAIR 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 ZyAIR to the computer and “binary” to set
binary transfer mode.
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 ZyAIR to the computer and “binary” to set
binary transfer mode.
10.2.7 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
ZyAIR IP address, “get” transfers the file source on the ZyAIR (rom-0, name of the configuration file on
the ZyAIR) to the file destination on the computer and renames it config.rom.
ZyAIR IP address, “get” transfers the file source on the ZyAIR (rom-0, name of the configuration file on
the ZyAIR) to the file destination on the computer and renames it config.rom.
10.2.8 GUI-based TFTP Clients
The following table describes some of the fields that you may see in GUI-based TFTP clients.