C H A P T E R 5 Troubleshooting Initial Startup Problems; Problem Solving Using A Subsystems Approach; Identifying Startup Problems - Cisco 7301 Installation And Configuration Manual

Chapter 5 Troubleshooting Initial Startup Problems

Problem Solving Using a Subsystems Approach

The key to solving problems with the system is isolating the problem to a specific subsystem. The first
step in solving startup problems is to compare what the system is doing to what it should be doing.
Because a startup problem is usually caused by a single component, it is more efficient to first isolate
the problem to a subsystem rather than troubleshoot each component in the system. For these
troubleshooting procedures, consider the following subsystems:
•
•
•
The following sections help you isolate a problem to one of these subsystems and direct you to the
appropriate troubleshooting section.

Identifying Startup Problems

Startup problems are commonly due to the source power or to a port adapter or service adapter that is
dislodged from the system board. Although an overtemperature condition is unlikely at initial startup,
the environmental monitoring functions are included in this chapter because they also monitor internal
voltages.
When you start up the router for the first time, you should observe the startup sequence described in the
"Starting the System and Observing Initial Conditions" section on page 3-9
Configuring the Router."
sequence and describes the steps to take if the system does not perform that sequence as expected.
LEDs indicate all system states in the startup sequence. By checking the state of the LEDs, you can
determine when and where the system failed in the startup sequence. Use the following descriptions to
isolate the problem to a subsystem, and then proceed to the appropriate sections to try to resolve the
problem.
When you start up the system by turning on the power supply switch, the following should occur:
•
•
•
OL-5418-07
Power subsystem—This subsystem comprises the power supply, the external power cable, and the
system board.
Cooling subsystem—The fans should be operating whenever system power is on. Contact your
customer service representative if you determine a fan is not functioning properly.
Processor subsystem—This subsystem includes the processing and input/output functions, the port
adapter or service adapter, and system memory and management functions. The ENABLE LED on
the port adapter indicates if the port adapter is initialized. A port adapter that is partially installed
can cause the system to pause indefinitely and reload.
This section contains a more detailed description of the normal startup
You should immediately hear the fans operating. If not, proceed to the
Subsystem" section on page
that a fan is faulty, contact a customer service representative. If a fan does not function properly at
initial startup, there are no installation adjustments that you should make.
The STATUS LED should come on. As the system boots to ROM monitor state, the STATUS LED
is amber. The STATUS LED turns green when the system boots to the Cisco IOS state. If the system
does not boot properly, call your local service representative.
The native RJ-45 EN LED comes on and indicates that a RJ-45 port (0/0, 0/1, or 0/2) is initialized
and enabled for operation by the system. This LED comes on during a successful router boot and
remains on during normal operation of the router.
If this LED remains off when you start the router, it is probably a problem with the RJ-45 port.
Consult Step 6 in the troubleshooting table on page 5-2.
5-5. If you determine that the power supply is functioning normally and
Cisco 7301 Installation and Configuration Guide
Problem Solving Using a Subsystems Approach
in Chapter 3, "Starting and
"Troubleshooting the Cooling
5-3