Cisco Systems 9001, 9001S, ASR9001, ASR9001s Normal Router Startup Sequence, Identifying Startup Issues

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Cisco ASR 9001 and Cisco ASR 9001-S Routers Hardware Installation Guide
OL-26701-02
Chapter 4 Troubleshooting the Installation
Troubleshooting Overview
For troubleshooting purposes in this chapter, the router consists of these subsystems:
•Power subsystem—Router chassis is shipped with up to two AC-input or DC-input power supply
modules installed in the Cisco ASR 9001 Router chassis.
•Chassis backplane power distribution—System transfers +12 VDC power from the power modules
to the chassis backplane and distributes it to all the cards through the backplane connectors. The fan
tray receives power from the chassis backplane and communicate to the RP CAN Bus controller.
•Processor subsystem—Includes the active Route Processor (RP) card with line card. The RP is
equipped with onboard processors. The RP downloads a copy of the Cisco software image to the line
card processor.
•Cooling subsystem—Consists of one fantray with 14 fans, which circulate cooling air through the
chassis.
Normal Router Startup Sequence
You can generally determine when and where the router failed during the startup sequence by checking
the status LEDs on the power modules and RP.
In a normal router startup sequence, this sequence of events and conditions occur:
1. The fan in each power module receives power and begins drawing air through the power supply.
The power module input power and output power indicators are on.
2. The fans in the fan tray receive power and begin drawing air through the chassis.
The fan tray OK indicator is on.
3. As the power-on and boot process progresses for the RP, the status of the RP appears on the front
panel of the card.
Identifying Startup Issues
Table 4-1 shows the LED states on the power modules (AC or DC), RP, and the fan tray after a successful
system startup.
Table 4-1 LEDs at System Startup
Component Type of Indicator Display Contents/LED Status and Meaning
Line Card Status LED Green: The line card is enabled and ready for use.
AC Power
Modules
Power status LEDs Green (ON): Input AC power OK.
Amber (OFF): No fault is present.
The correct power module voltages are present and no faults have been detected.
DC Power
Modules
Power status LEDs Green (ON): Input DC power OK.
Amber (OFF): No fault is present.
The correct power module voltages are present and no faults have been detected.
Fan Tray Fan tray status LED Green (ON): Fan Tray OK.
The fan tray fans are operating correctly.