Cisco UBR10012 Quick Start Manual page 69

Table 13
Symptom
System overheats.
When the fans are operating, you
Tip
can hear them. You can also feel
air being drawn in at the bottom
front and expelled at the top rear
of the chassis.
STATUS LED on the primary PRE did
not illuminate (solid green) at the end of
the boot-up sequence.
If no LEDs on the PRE are illuminated
but LEDs on other modules are
illuminated.
The FAIL LED on the PRE is illuminated
(yellow).
The STATUS lights on the TCC+ or
DTCC cards are off.
OL-24972-01
Troubleshooting Tips (continued)
Action
Check for fan failure by checking the fan status LEDs and running the show
1.
environment command.
Router# show environment
Temperature normal: chassis inlet measured at 29C/84F
Temperature normal: chassis core measured at 42C/107F
Fan:
Power Entry Module 0 type DC status:
Power Entry Module 1 type DC status:
Router#
Ensure that no alarms are triggered on the fan assembly module.
2.
Check if there is sufficient ventilation on the chassis intake and chassis
3.
exhaust.
Verify if the ambient temperature is within the specified range.
4.
If the problem persists, see the
5.
Service Request" section on page
Check the other LEDs on other modules in the chassis. If no other LEDs are
illuminated, check for a problem in the power subsystem.
Remove the PRE from the slot, check for any bent or broken pins on the backplane
connectors; then reinsert the PRE, ensuring that it makes solid contact with the
backplane and is securely locked in by firmly closing both the locking levers.
Remove the PRE and reinsert it. If that fails, insert a new PRE. Repeat the process
for the redundant PRE, except that its STATUS LED should be off and its
alphanumeric display should read IOS STBY if it is operating correctly.
1. If both PREs are operating correctly, check the Power LEDs on each TCC+
or DTCC cards. Are they both illuminated (green)?
Is the STATUS LED on the primary TCC+ or DTCC illuminated (solid
a.
green) indicating that it is the primary card?
Is the STATUS LED on the secondary TCC+ or DTCC flashing (green)
b.
indicating that it is the redundant card?
If none of the above solves the problem, verify the Cisco IOS Release on
c.
the router supports the TCC+ or DTCC card.
Check whether at least one PRE card is present in the system.
1.
Try reseating the TCC+ or the DTCC card, making sure that it firmly
2.
connects to the backplane and that both captive screws are tightly connected.
If the problem persists, then replace the card. See the
3.
Documentation and Submitting a Service Request" section on page
Cisco uBR10012 Series Universal Broadband Router–Quick Start Guide
OK
OK
OK
"Obtaining Documentation and Submitting a
71.
"Obtaining
Troubleshooting
71.
69