Catalyst 4000 Series Installation Guide
Troubleshooting the Installation
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Troubleshooting the Installation

Table Of Contents

Troubleshooting the Installation

System Boot Verification

Problem Solving to the System Component Level

Using LEDs to Identify Startup Problems

Troubleshooting the Power Supply

Troubleshooting the Fan Assembly

Contacting the Cisco Technical Assistance Center


Troubleshooting the Installation


If your system has problems starting up, use the information in this chapter to help isolate the cause. Problems with the initial startup are often caused by a switching module that has become dislodged from the backplane or a power cord that is disconnected from the power supply.

Although temperature conditions above the maximum acceptable level rarely occur at initial startup, environmental monitoring functions are included in this chapter because they also monitor power supply output voltages.

This chapter contains these sections:

System Boot Verification

Problem Solving to the System Component Level

Using LEDs to Identify Startup Problems

Troubleshooting the Power Supply

Troubleshooting the Fan Assembly

Contacting the Cisco Technical Assistance Center


Note This chapter covers only the chassis component hardware aspects of troubleshooting. For configuration issues, refer to the software configuration guide or command reference publication for your switch.


System Boot Verification

When the initial system boot is complete, verify the following:

That the power supplies are supplying power to the system

That the system fan assembly is operating

That the system software boots successfully

That the supervisor engine and all switching modules are installed properly in their slots, and that each initialized without problems

If all of these conditions are met and the hardware installation is complete, refer to the software configuration guide and command reference publications for your switch so that you can troubleshoot the software.

If any of these conditions is 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. Your first step is to compare what the system is doing to what it should be doing. Because a startup problem can usually be caused by a single component, it is more efficient to isolate the problem to a subsystem rather than troubleshoot each separate component in the system.

The switch consists of the following subsystems:

Power supply—Includes the power supplies and power supply fans. If you experience problems with the power supplies, see the "Troubleshooting the Power Supply" section.

Fan assembly—The system fan assembly should be operating whenever system power is on. You should be able to hear the fan assembly when the system is operating. If you determine that the fan assembly is not operating, see the "Troubleshooting the Fan Assembly" section.

Supervisor engine—The supervisor engine contains the system operating software, so check the supervisor engine if you have trouble with the system software. The LEDs labeled STATUS on the supervisor engine indicate whether the supervisor engine has initialized correctly. For more information, see the "Contacting the Cisco Technical Assistance Center" section.

Switching modules—The LEDs labeled STATUS on each switching module indicate whether the switching module has been initialized correctly. The supervisor engine must be operating properly before the switching module will initialize. If a switching module is improperly installed in the switch, it will not function. For more information, see the "Contacting the Cisco Technical Assistance Center" section.

Using LEDs to Identify Startup Problems

The 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. If you have problems after the switch is on, refer to the configuration procedures in the software configuration guide for your switch.

After you connect the power cords to your Catalyst 4000 series switch, follow these steps to determine if your system is operating properly:


Step 1 Check the power supply LEDs as follows:

The LED labeled GOOD should turn green when power is applied to the supply. The LED should remain on during normal system operation.

If the LED labeled GOOD does not light, or if the LED labeled FAIL lights, see the "Troubleshooting the Power Supply" section.


Note If a power supply is installed and not connected to a power source, it will indicate a failure.


Step 2 Listen for the system fan assembly. If you do not immediately hear the system fan assembly begin to operate, see the "Troubleshooting the Fan Assembly" section.

Step 3 Check that the LEDs on the supervisor engine light as follows:

The LED labeled STATUS flashes orange once and stays orange during diagnostic boot tests.

It turns green when the module is operational (online).

If the system software is unable to start up, this LED stays orange.

If the LED labeled STATUS on the supervisor engine front panel is red or orange, see the "Contacting the Cisco Technical Assistance Center" section.

The Ethernet management port LED turns green when the module is operational (online). If no signal is detected, the LED labeled LINK turns off.

Step 4 Verify that the LEDs labeled STATUS on each switching module are green when the supervisor engine completes initialization. This LED indicates that the supervisor engine and switching modules are receiving power, have been recognized by the supervisor engine, and contain a valid Flash code version. However, this LED does not indicate the state of the individual interfaces on the switching modules. If a LED labeled STATUS is red or orange, see the "Contacting the Cisco Technical Assistance Center" section.

Step 5 If the boot information and system banner are not displayed, verify that the terminal is set correctly and connected properly to the monitoring port.


Troubleshooting the Power Supply

Follow these steps to help isolate a power subsystem problem:


Step 1 Check whether the power supply LED labeled GOOD is on or the LED labeled FAIL is on.


Note This procedure assumes that only one power supply is installed in the Catalyst 4003 switch or two power supplies are installed in the Catalyst 4006 switch.


Step 2 If the LED labeled GOOD is off or if the LED labeled FAIL is on, take the following steps:

Ensure that the power supply is flush with the back of the chassis.

Unplug the power cord, loosen and reinstall the power supply, tighten the captive installation screws, and then plug in the power cord.

Step 3 If the LED labeled GOOD remains off, there might be a problem with the AC source or the power cable. Connect the power cord to another power source if one is available.

Step 4 If the LED labeled GOOD fails to light after you connect the power supply to a new power source, replace the power cord.


Note If this unit has more than one power cord, repeat Step 1 through Step 4 for each power supply.


Step 5 If the LED still fails to light when the switch is connected to a different power source with a new power cord, the power supply is probably faulty. Replace the power supply.

Step 6 If a second power supply is available, install it in the second power supply bay.

Step 7 Check that the LED labeled GOOD is on for the additional power supply. Check that the LED labeled FAIL is off.


Note This procedure assumes that two or more power supplies are installed in the switch chassis and that each is connected to an AC power source.


Step 8 If the LEDs are not on, repeat the previous procedure to troubleshoot the second or third power supply.

If you are unable to resolve the problem, or if you determine that either a power supply or backplane connector is faulty, contact a customer service representative for instructions.


Troubleshooting the Fan Assembly


Note All fans must be operating or a failure will occur.


Follow these steps to help isolate a fan assembly problem:


Step 1 Check whether the supervisor engine software is reporting a temperature problem or problem with the fans.

Step 2 Determine whether the airflow is unrestricted.

Step 3 Determine whether the power supply is functioning properly. If it is not, see the "Troubleshooting the Power Supply" section.

Step 4 Check that the fan assembly is properly seated in the backplane by loosening the captive installation screws, removing the fan assembly, and reinstalling it.

Step 5 Restart the system.

Step 6 Verify that all fans are operating.

Step 7 If the system is still detecting a fan assembly failure, contact a customer service representative for assistance.


Contacting the Cisco Technical Assistance Center

If you are unable to solve a startup problem after using the troubleshooting suggestions in this chapter, contact a Cisco Technical Assistance Center (TAC) representative for assistance and further instructions.

Before you call, have the following information ready to help your customer service representative assist you as quickly as possible:

Date you received the switch

Chassis serial number (located on a label on the right of the rear panel of the chassis)

Type of software and release number

Maintenance agreement or warranty information

Brief description of the problem

Brief explanation of the steps that you have already taken to isolate and resolve the problem

See the "Obtaining Technical Assistance" section on page xxii for more information about contacting the TAC.