Chapter 4 Troubleshooting the Installation
Identifying Startup Problems
When you start up the router for the first time, you should observe the startup sequence. The normal startup sequence is as follows:
•Each card in the system has an MBus module and at least one
•The clock and scheduler card (CSC), containing the system clock, immediately powers up.
•The MBus module on the RP monitors the progress of the CSC power up. When the CSC has powered up, the MBus module on the RP turns on its
•The RP sends instructions to each line card to power up. Each line card processor begins to perform its own boot process and notifies the RP when the boot process is complete through its MBus module.
•The RP sends a command to each switch fabric card to power up. As each switch fabric card powers up, its progress is monitored by its MBus module processor. When the
•As the boot process progresses for each card, the status of the card is shown on the alphanumeric LED displays. The left display is powered by the
By checking the state of the LEDs on the power supplies and the alphanumeric displays on the RP and line cards, you can determine when and where the system failed in the startup sequence.
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