Universal Broadband Router Hardware Installation Guide

4-3
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
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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 4-1 lists general FRU fault symptoms and recommendations.
Ta b l e 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
properly
If the system has power, check the FAIL LED on the PRE and any information on the
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/-60VDC and 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
critical alarm (Critical LED
on the PRE is on)
Enter the show facility-alarm status command at the console.
System experiences a major
alarm (Major LED on the
PRE is on)
Enter the show facility-alarm status command at the console.
System experiences a minor
alarm (Minor LED on the
PRE is on)
Enter the show facility-alarm status command at the console.