Cisco ASR 5000 Installation Manual - Page 2

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Cisco ASR 5000 Installation Manual
Understanding the System Boot Process
The following figure provides a flowchart that explains each step in the startup process.
Figure 1: Boot Process Flowchart
Step 1
When power is first applied to the chassis, or after a reboot, only the SMC in slots 8 and 9 receive power. Therefore, the
SMCs are the first cards to boot and their LEDs are the first to light up. Once the system confirms that cards are located
in slots 8 and 9, power is quickly applied to the SPIOs in slots 24 and 25.
Step 2
During the startup process, each card performs a series of Power-On Self Tests (POSTs) to ensure that the hardware is
ASR 5000 Installation Guide
2
Applying Power and Verifying the Installation