Allied Telesis AT-8550 - Manual (Page 240)

Upgrading and Accessing BootROM
14-6
Upgrading and Accessing BootROM
The BootROM of the switch initializes certain important switch
variables during the boot process. If necessary, BootROM can be
upgraded, after the switch has booted, using TFTP. In the event the
switch does not boot properly, some boot option functions can be
accessed through a special BootROM menu.
Upgrading
BootROM
Upgrading BootROM is done using TFTP (from the CLI), after the
switch has booted. Upgrade the BootROM only when asked to do so
by a representative from Allied Telesyn’s Technical Support
department. To upgrade the BootROM, use the following command:
download bootrom [ | ]
Accessing the
BootROM menu
Interaction with the BootROM menu is only required under special
circumstances, and should be done only under the direction of Allied
Telesyn’s Technical Support department. The necessity of using
these functions implies a non-standard problem which requires the
assistance of Allied Telesyn’s Technical Support department.
To access the BootROM menu:
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.