Problem Solving To The System Component Level; Identifying Startup Problems - Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual

Problem Solving to the System Component Level

the Cisco 7600 Series Internet Router IOS Command Reference publications to troubleshoot the
software. However, if any of these conditions are not met, use the procedures in this chapter to isolate
and, if possible, resolve the problem.
Problem Solving to the System Component Level
The key to success when troubleshooting the system is to isolate the problem to a specific system
component. The first step is to compare what the system is doing to what it should be doing. Because a
startup problem can usually be attributed to a single component, it is more efficient to isolate the problem
to a subsystem rather than troubleshoot each separate component in the system.
The router consists of the following subsystems:
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Identifying Startup Problems

LEDs indicate all system states in the startup sequence. By checking the LEDs, you can determine when
and where the system failed in the startup sequence.
Perform these steps to identify startup problems:
Turn on the power supplies. You should immediately hear the system fan assembly begin to operate. If
Step 1
you do not, see the
power supplies are functioning normally and that the fan assembly is faulty, contact a customer service
representative. If the system fan assembly does not function properly at initial startup, there are no
installation adjustments that you can make. To replace the fan assembly, see the
Replacing the Fan Assembly" section on page
Check that the LEDs on the supervisor engine light as follows:
Step 2
Cisco 7600 Series Router Installation Guide
4-2
Power supply—Includes the power supplies and power supply fans.
Power entry module (PEM)—On the Cisco 7603 Router and Cisco 7606 Router, there is one PEM
for each power supply. The PEM connects the site source to the power supply.
Fan assembly—The chassis fan assembly should operate whenever system power is on. You should
see the FAN LED turn green and should be able to hear the fan assembly to determine whether or
not it is operating. If the FAN LED is red, this indicates that one or more fans in the fan assembly
is not operating. You should immediately contact a customer service representative. (See the
"Contacting Customer Service" section on page
can make if the fan assembly does not function properly at initial startup.
Supervisor engine—The supervisor engine contains the system operating software, so check the
supervisor engine if you have trouble with the system software. Status LEDs on the supervisor
engine indicate whether or not the supervisor engine is able to initialize the module.
If you have a redundant supervisor engine, refer to the Cisco 7600 Series Internet Router Software
Configuration Guide or the Cisco 7600 Series Internet Router IOS Software Configuration Guide
publications for descriptions of how the redundant supervisor engine comes online and how the
software images are handled.
Modules—Status LEDs on each module indicate if the module has been initialized by the supervisor
engine. A module that is partially installed in the backplane can cause the system to halt.
"Troubleshooting the Power Supply" section on page
4-8.) There are no installation adjustments that you
5-119.
Chapter 4 Troubleshooting
4-3. If you determine that the
"Removing and
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