Configuring Rom; Entering Rom Configuration Mode; Booting Rom Mode From A Flash Device - Cisco RJ-45-to-AUX Brochure

Configuring ROM

ROM monitor is a ROM−based program that can be configured to execute upon the following conditions:
Upon boot−up
Upon recycling the switch power
When a fatal exception error occurs
When the switch fails to find a valid system image
If the nonvolatile RAM (NVRAM) configuration is corrupt
If the configuration register is set to enter ROM monitor mode
The ROM monitor CLI is present only on the Supervisor Engine III, Catalyst 4000, and the 2948G series
switch Supervisor Engine modules. When the switch is in the ROM monitor mode, the switch will allow you
to load a system image manually from Flash memory, from a Trivial File Transfer Protocol (TFTP) file, or
from the bootflash.

Entering ROM Configuration Mode

You can enter ROM configuration mode by using one of these two methods:
Cycle the power on the switch and press the Break key during the first 60 seconds of startup. (The
Break key is enabled for the first 60 seconds after cycling the power on the switch.)
Enter ROM mode through a terminal server, using Telnet or another terminal emulation program.
Enter the break command as soon as the power is cycled on the switch.
ROM monitor has its own unique prompt that informs you when you have entered ROM monitor mode. The
prompt you will see when you have entered ROM configuration mode is rommon>.

Booting ROM Mode from a Flash Device

To boot from a flash device, you can use the following syntax, which is shown in Table 2.9:
boot [−xv] [device][imagename]
Table 2.9 : The boot command syntaxes.
Syntax
−x
−v
device
imagename
The image name is optional. If no image name is presented, the system defaults to the first valid file in the
device. Remember that file names are case sensitive. Let's look at an example of using this command:
rommon> boot −x bootflash:cat5000−sup2.2−2.bin
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
Uncompressing file:
#######################################################################
#######################################################################
#######################################################################
Meaning
Identifies the image to load but not execute
Identifies a need to use verbose mode
Identifies the device
Identifies the image to use
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