Cisco Systems Cisco uBR10012 manual Identifying Startup Problems

Chapter 4 Troubleshooting the Installation

Identifying Startup Problems

Identifying Startup Problems

Startup problems are commonly due to the source power or to a line card that is not properly seated in the router. Although an overtemperature condition is unlikely at initial startup, the environmental monitoring functions are included in this chapter because they also monitor internal voltages.

When you start up the router for the first time, observe the startup sequence described in the “Powering On the System” section on page 3-60. This provides a detailed description of a normal startup sequence.

LEDs indicate all system states in the startup sequence. By checking the state of the LEDs, you can determine when and where the system failed in the startup sequence. Use the following descriptions to isolate the problem to a subsystem, and then proceed to the appropriate sections to try to resolve the problem.

When you start up the system by turning the power supply switch to the on () position, the following should occur:

1.Fans—the fans start operating. The FANS OK LED on the fan assembly module turns green. You should be able to feel the air being taken in at the bottom front of the router and blown out at the top rear of the router.

If not, proceed to the “Troubleshooting the Cooling Subsystem” section on page 4-11.

2.DC PEM—the Power LED on each DC PEM turns green to indicate that the PEM is connected to an active DC power source and is supplying power to the chassis.

–If the Fault LED is on (yellow), it indicates that the PEM is connected to an active DC power source but is not providing power to the chassis.

–If the Miswire LED is on (yellow), it indicates that the wires from the DC power source to this DC PEM are reversed.

–Proceed to the “Troubleshooting the Power Subsystem” section on page 4-7.

3.PREs—the FAIL LED on the PRE modules briefly lights during the power-on sequence and then it turns off. If the FAIL LED remains on, try removing and reseating the PRE module, and verify that the card is fully inserted and that both locking levers are fully down in the locked position.

If the FAIL LED remains on, make a note of the failure code that appears in the PRE module’s LCD screen and call TAC for instructions.

4.Line cards—Verify the line card “Enabled” LEDs.

Each line card has an enabled LED that goes on initially at power-on and then goes off. The LED then goes on and remains on when the corresponding port is enabled and configured for operations.

If an enabled LED fails to go on at initial power-on, or if the LED fails to go on and remain on after the port is enabled and configured, proceed to the “Troubleshooting the Cooling Subsystem” section on page 4-11.

Note The slot 0 and slot 1 LEDs only go on when the PC media card slot is being accessed by the system. These LEDs remain off during normal operation of the router and do not indicate startup problems.

5.The initial system banner displays on the console screen.

If it is not displayed, see the “Connecting Network Management Cables” section on page 3-52 to verify that the terminal is set up correctly and that it is properly connected to the router’s console port.

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

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