Chapter 4 Troubleshooting the Installation
Troubleshooting the Cooling Subsystem
The sequence on the redundant PRE is similar, except that the STATUS LED remains OFF and the messages on the alphanumeric display are slightly different. The final message upon a successful
Use the following procedure to troubleshoot the PRE modules.
Step 1 Check the following if a problem appears on one of the PRE modules.
a.Did the STATUS LED on the primary PRE light solid (green) at the end of the
b.If no, check the other LEDs on other modules in the chassis. If no other LEDs are lit, check for a problem in the power subsystem, as described in the “Troubleshooting the Power Subsystem” section on page
c.If no, and no other LEDs on the PRE are lit but LEDs on other modules are lit, remove the PRE from the slot, check for any bent or broken pins on the backplane connectors, and reinsert it, ensuring it makes solid contact with the backplane and is securely locked in by firmly closing both locking levers.
d.If no, but the FAIL LED is lit (yellow), remove the PRE and reinsert it. If that fails, insert a new PRE. If that fails, contact TAC for assistance.
Step 2 Repeat the above steps 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.
a.If both PREs are operating correctly, check the Power LEDs on each TCC+ card. Are the POWER LEDs on each TCC+ card lighted (green)?
b.If no, remove the TCC+ card and reinsert it, making it sure it firmly connects to the backplane and that both captive screws are tightly connected.
c.If yes, proceed to the next step.
Step 3 Verify the Status LEDs on the TCC+ card.
a.Is the STATUS LED on the primary TCC+ on (solid green) indicating that it is the primary card?
b.Is the STATUS LED on the secondary TCC+ flashing (green) indicating that it is the redundant card?
c.If no, verify that the version of Cisco IOS on the router supports the TCC+ card.
Step 4 Contact TAC for assistance if necessary. See the “Obtaining Documentation and Submitting a Service Request” section on page xxi.
Troubleshooting the Cooling Subsystem
Check the following to help isolate a problem with the cooling system.
Step 1 Do the fans start operating when you start up the system?
When the fans are operating, you can hear them. You can also feel air being drawn in at the bottom front and expelled at the top rear of the chassis.
a.If no, there is a problem with the fan or power. (See the “Troubleshooting the Power Subsystem” section on page
b.If yes, continue with the next step.
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