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Chapter 4 System Startup and Basic System Configuration
Powering On the Router and Observing the Boot Process
4-4
Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
OL-11496-01
7. When the Cisco IOS software boots, it polls all other cards in the system,
powers them on, and loads the Cisco IOS software they require.
8. The RP waits for all other cards to finish their boot processes.
Powering On the Router and Observing the Boot
Process
The first time you start the router, observe the following conditions:
Step 1 Switch on all the circuit breakers that control power to the router.
Step 2 Observe the power entry module LEDs:
• AC PEMs—The green PWR OK LED should be on and the power supply fan
operating.
• DC PEMs—The green PWR OK LED should be on and the power supply fan
operating.
Step 3 Check the blower module:
• Ensure that the green OK LED is on.
• Listen for the blowers in the blower modules; you should hear them operating
immediately. In a noisy environment, the blowers may be difficult to hear.
You can place your hand in front of the exhaust vents near the top rear of the
chassis to verify that the blower is operating.