Cisco Systems Cisco uBR10012 manual Troubleshooting the Processor Subsystem

Chapter 4 Troubleshooting the Installation

Troubleshooting the Processor Subsystem

–The “External AC Supply Fault” message indicates that one of the power modules is reporting either a fault, an over-temperature condition, or is missing. Check the LEDs on the front panels of the power modules on the external power supply to discover which module has the fault.

c.If the “Input/Output Voltage Fault” message indicates that one of the power modules is not receiving AC-input power then, check the LEDs on each power module, check that each power module is plugged into an AC-input power outlet, and that those outlets are providing power.

Step 2 If you are using an older version of the PEM, verify that the DC and AC OK LEDs are on.

a.If yes, then the power shelf is operational.

b.If no, do the following:

–Make sure that the AC power cord is correctly plugged in to both the AC-output wall outlet and in to the back of the AC-input power shelf. (A separate power cord is used for each power supply.)

–Make sure that the AC power supply is properly inserted, seated, and locked. If necessary, remove the AC power supply and reinsert it.

–Check the external AC power source.

–Swap the AC power supply with one of the others. If the failure follows the power supply, replace the power supply. If the failure remains in that particular power bay, double-check the external AC power source and the power cord connections; if they are correct, contact the Cisco TAC for additional troubleshooting information.

c.If only DC OK LED is not on, then double-check the wiring to the Cisco uBR10012 router DC-input terminal blocks.

Step 3 Check to see if the Fault LED is yellow, if it is then:

–Check that the external AC power source is supplying consistent AC voltage at the proper levels, without spikes or brownouts.

–Flip the circuit-breaker for the external AC power source.

–Replace the power supply with a known good replacement.

Step 4 If none of these measures work, contact a service representative for instructions. See the “Obtaining Documentation and Submitting a Service Request” section on page xxi.

Troubleshooting the Processor Subsystem

The processor subsystem on the Cisco uBR10012 router consists of the performance routing engine (PRE) modules and the timing, communication, and control plus (TCC+) cards. At system startup, the following sequence should appear on the primary PRE.

1.The FAIL LED briefly comes on (yellow), turn off, and the STATUS LED starts flashing (yellow).

2.A series of messages appear on the PRE alphameric display indicating the progress of the boot-up sequence.

3.Upon successful completion of the boot-up sequence, the message IOS RUN appears on the alphanumeric display.

4.The STATUS LED comes on (green) to indicate this is the primary PRE.

	Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
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