134
C
HAPTER
10: S
OFTWARE
U
PGRADE
AND
B
OOT
O
PTIONS
To access the BootROM menu, follow these steps:
1
Attach to the console port of the switch, as described in Chapter 2
.
2
With the serial port connected to a properly configured terminal or
terminal emulator, power cycle the switch while depressing the spacebar
on the keyboard of the terminal.
As soon as you see the
BootROM->
prompt, release the spacebar. You can
see a simple help menu by pressing h . Options in the menu include
■
Selecting the image to boot from
■
Booting to factory default configuration
■
Performing a serial download of an image
For example, to change the image that the switch boots from in flash
memory, press 1 for the image stored in primary or 2 for the image stored
in secondary. Then, press the f key to boot from newly selected on-board
flash memory.
To boot to factory default configuration, press the d key for default and
the f key to boot from the configured on-board flash.
To perform a serial download, you can optionally change the baud rate to
38.4K using the b command, and then pressing the s key to prepare the
switch for an image to be sent from your terminal using the XMODEM
protocol. After this has completed, select the g command, to boot the
image that is currently in RAM. The switch restores the console port to
9600 bps, and begins the boot process. Doing a serial download does not
store an image into flash, it only allows the switch to boot an operational
image so that a normal TFTP upgrade from CLI can then be performed.
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