Using Leds To Identify Startup Problems - Cisco Line Card 4500 E-Series Installation Manual

Chapter 5 Troubleshooting

Using LEDs to Identify Startup Problems

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. All system
states in the startup sequence are indicated by LEDs. 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 following subsystem troubleshooting information and the configuration procedures in the software
configuration guide for your switch.
After you connect the power cords to your Catalyst 4500 series switch, follow these steps to determine
whether your system is operating properly:
Check the power supply LEDs:
Step 1
•
•
Note
Listen for the system fan assembly. The system fan assembly should be operating whenever system
Step 2
power is on. If you do not hear it when the switch is on, see the
section on page
Check that the LEDs on the supervisor engine light as follows:
Step 3
•
•
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 an LED labeled STATUS
is red or orange, try reseating the switching module or supervisor engine and restarting the switch. For
more information, see the
that the switching module is not operating, contact Cisco TAC as described in the
Solutions" section on page
OL-13972-02
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 on page
If a power supply is installed and not connected to a power source, power supply LEDs indicate
a failure.
5-6.
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, connect a
–
console to the management port and use the show environment command to check for possible
problems.
The Ethernet management port LED turns green when the module is operational (online) and a link
is established with another network device. If no signal is detected, the LED labeled LINK turns off.
If there is a problem with the supervisor engine, try reseating the supervisor engine in the chassis
and restarting the switch. For more troubleshooting information, see the
Supervisor Engines" section on page
"Troubleshooting Switching Modules" section on page
5-14.
5-4.
"Troubleshooting the Fan Assembly"
5-10.
Catalyst 4500 E-Series Switches Installation Guide
Using LEDs to Identify Startup Problems
"Troubleshooting
5-8. If you determine
"Some Problems and
5-3