Cisco Systems Cisco uBR10012 manual General Troubleshooting Tips, Symptom Steps to Take

Chapter 4 Troubleshooting the Installation

Troubleshooting Installation Problems

General Troubleshooting Tips

All Cisco uBR10012 router FRUs (field replaceable units) are hot-swapable. Procedures for removing and replacing the FRUs can be found in Chapter 5, “Maintaining the Cisco uBR10012 Router.”

List of FRU modules:

•Fan module

•TCC+ modules

•Power entry modules (PEM)

•PRE modules

•Cable interface cards and uplink cards

Table 4-1lists general FRU fault symptoms and recommendations.

Table 4-1	General Troubleshooting Tips
Symptom		Steps to Take
System fails to power on		Check that:
		• All power cords are properly connected to the Cisco uBR10012 router and at the power
		connection end.
		• The DC PEM power switches are turned on and the POWER LED is on (green).
		• The AC PEM power switches are turned on and the POWER LED is on (green).
		• The fan assembly module is fully inserted, and the FANS OK LED is lighted (green).
System fails to boot up		If the system has power, check the FAIL LED on the PRE and any information on the
properly		alphanumeric display. If the FAIL LED is on, see Troubleshooting the Power Subsystem,
		page 4-7
DC PEM problem		• If the FAULT LED is on, see Troubleshooting the Power Subsystem, page 4-7.
		• If the MISWIRE LED is on, the –48/-60VDCand return (RTN+) wires are reversed. Power
		off the PEM and reconnect the wires correctly (see the “Connecting DC Power to the
		Cisco uBR10012 Router” section on page 3-28).
AC PEM problem		• If the power LED on the AC PEM is off, check the AC power source.
		• If the fault LED is yellow, check to see if the PEM is properly inserted in the chassis.
		• Check the Cisco IOS Release version that you are using. Versions earlier than Cisco IOS
		Release 12.2(4)XFI, 12.2(4)BC1, or later do not correctly identify the AC PEM’s error
		messages.
System experiences a		Enter the show facility-alarm status command at the console.
critical alarm (Critical LED
on the PRE is on)
System experiences a major		Enter the show facility-alarm status command at the console.
alarm (Major LED on the
PRE is on)
System experiences a minor		Enter the show facility-alarm status command at the console.
alarm (Minor LED on the
PRE is on)

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

OL-18259-01 4-3