2.Upgrading Firmware via the Serial Port
The switch contains two firmware components that can be upgraded; the diag-
nostics (or Boot-ROM) code and runtime operation code. The runtime code can
be upgraded via the switch’s RS-232 serial console port,via a network connec-
tion to a TFTP server, or using SNMP management software. The diagnostics
code can be upgraded only via the switch’s RS-232 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 download-
ing 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 “Required Connections” on
page 1-3.)
1. Connect a PC to the switch’s Console port using a null-modem or crossover
RS-232 cable with a female DB-9 connector.
2. 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.
3. Power cycle the switch.
4. When the switch initialization screen appears, enter firmware-download mode
by pressing <Ctrl><f> immediately after the diagnostic test results. Screen text
similar to that shown below displays:
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