Boot Process Overview - Cisco 12404 Installation And Configuration Manual

Boot Process Overview

Note

Boot Process Overview

Cisco 12404 Internet Router Installation and Configuration Guide
3-41
By default, the software configuration register is set to 0x0102, causing the
system to boot automatically from the Cisco IOS software image stored on the
Flash memory card.
New Flash memory cards must be formatted before you can use them.
After you start the router, if you want to format a new Flash memory card, refer
to the section "Formatting a Flash Memory Card, page
This example procedure assumes you have plugged the router into a power source
and the router is running, fan tray assembly fans are audible and the fabric and
alarm card ENABLED LEDs are On.
The following is an example of a typical boot process.
The RP MBus module receives a +5 VDC voltage and starts executing MBus
•
software.
The RP determines the router configuration by sending a message via the
•
alarm function on the CSF requesting all installed devices to identify
themselves. Their responses provide slot numbers and card and component
types. The RP and line cards are then powered up.
The power-on-reset logic of the RP is delayed long enough to allow power
•
and both local and CSF clocks to stabilize.
After the power-on reset logic is released, the RP begins to execute the ROM
•
monitor software.
If the ROM monitor is configured to autoboot, it automatically loads and
•
boots the Cisco IOS software.
If the ROM monitor is not configured to autoboot, you must boot the Cisco
•
IOS software manually. See
When the Cisco IOS software boots, it polls all other cards in the system,
•
powers them up, and loads the Cisco IOS software they require.
Chapter 3 Installing the Cisco 12404 Internet Router
Manually Booting the System, page
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