User`s manual

User’s Manual 373
Appendix B: Upgrading Firmware Through the Serial Port
The switch contains three firmware components that can be upgraded; the loader code, diagnostics (or
Boot-ROM) code, and runtime operation code. The runtime code can be upgraded via the switch’s RS232
serial console port, via a network connection to a TFTP server, or using SNMP management software. The
loader code and diagnostics code can be upgraded only via the switch’s RS232 serial console port.
You can use the switch’s web interface to download runtime code via TFTP. Downloading large runtime
code files via TFTP is normally much faster than downloading via the switch’s serial port.
You can upgrade switch firmware by connecting a PC directly to the serial Console port on the switch’s front
panel and using VT100 terminal emulation software that supports the XModem protocol. (See section 2.2
Connections.)
Connect a PC to the switch’s Console port using a null-modem or crossover RS-232 cable with a female
DB-9 connector.
Configure the terminal emulation software’s communication parameters to 9600 baud, 8 data bits, 1 stop bit,
no parity, and set flow control to none.
B.1 Power Cycle the Switch.
When the switch initialization screen appears, enter firmware-download mode by pressing Ctrl and u
immediately after power on or rebooting the switch. Screen text similar to that shown below displays:
File Name S/Up Type Size Create Time
--------------------------------- ---- ---- ---------- --------
$logfile_1 0 3 64 00:00:07
$logfile_2 0 3 64 00:00:12
diag_0070 0 1 96500 00:06:37
diag_0074 1 1 97780 00:00:05
run_03024 0 2 1121956 00:21:41
run_10020 1 2 1124416 00:00:10
--------------------------------- ---- ---- ---------- --------
[X]modem Download [D]elete File [S]et Startup File
[C]hange Baudrate [Q]uit
Select>
Press <c> to change the baud rate of the switch’s serial connection.
Press <b> to select the option for 115200 baud.
There are two baud rate settings available, 9600 and 115200. Using the higher baud rate minimizes the time
required to download firmware code files.
Set your PC’s terminal emulation software to match the 115200 baud rate. Press Enter to reset
communications with the switch.
Select>
Change baudrate [A]9600 [B]115200
Baudrate set to 115200
Check that the switch has sufficient flash memory space for the new code file before starting the download.
You can store a maximum of only two runtime and two diagnostic code files in the switch’s flash memory.
Use the [D]elete File command to remove a runtime or diagnostic file.