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Cisco 7600 Series Router Installation Guide
OL-4503-26
Chapter 4 Troubleshooting
Troubleshooting Modules
Perform these steps when troubleshooting the fan assembly to isolate a fan assembly problem:
Step 1 Verify that the FAN LED on the fan assembly is green.
If it is not, see the “Problem Solving to the System Component Level” section on page 4-2 to determine
whether the power subsystem is functioning properly.
Step 2 Verify that the FAN LED is red.
• If it is red, the fan assembly is not seated in the backplane or has malfunctioned.
• To ensure that the fan assembly is seated properly, loosen the captive installation screws, remove the
fan assembly, and reinstall it.
• Tighten all captive installation screws, and then restart the system.
• If the FAN LED is still red, the system detects a fan assembly failure. Contact a customer service
representative for instructions.
Troubleshooting Modules
Perform these steps when troubleshooting the modules to isolate a supervisor engine or module problem:
Step 1 Verify that all status LEDs are on.
Step 2 If any status LEDs on the supervisor engine or any modules are red or off, the module might have shifted
out of its slot. Reseat the module until both ejector levers are at 90 degrees to the rear of the chassis.
Tighten the captive installation screws at the left and right of the module front panel, and restart the
system.
If the status LED on a module is orange, the module might be busy or disabled. Refer to the
Cisco
7600 Series Internet Router Software Configuration Guide, the Cisco 7600 Series Internet Router
IOS Software Configuration Guide, the Cisco
7600 Series Internet Router IOS Command Reference or
the Cisco
7600 Series Internet Router IOS Command Reference publications to configure or enable the
interfaces. After the system reinitializes the interfaces, the status LED on the module should be green.
Ta b l e 4-6 Troubleshooting An Old Fan Module
Problem Solution
Old fan module does not work Set the following in ROMMON mode:
ALLOWALLFANS=1
ALLOWALLFAN=1
ALLOWANYFAN=1
ALLOWANYPS=1
sync
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