Using Leds To Identify Startup Problems - Cisco CAtalyst 4500 Series Installation Manual

Using LEDs to Identify Startup Problems

Using LEDs to Identify Startup Problems
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Catalyst 4500 Series Switches Installation Guide
5-4
All system states in the startup sequence are indicated using 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 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:
The LED labeled GOOD should turn green when power is applied to the
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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,
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see the "Troubleshooting the Power Supply" section on page
If a power supply is installed and not connected to a power source, power
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supply LEDs will indicate a failure.
Listen for the system fan assembly. If you do not immediately hear it begin to
operate, see the "Troubleshooting the Fan Assembly" section on page
Check that the LEDs on the supervisor engine light as follows:
The LED labeled STATUS flashes orange once and stays orange during
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diagnostic boot tests.
It turns green when the module is operational (online).
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If the system software is unable to start up, this LED stays orange.
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If the LED labeled STATUS on the supervisor engine front panel is red
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or orange, connect a console to the management port and use the show
environment command to check for possible problems. For more
information, see the
page 5-13.
The Ethernet management port LED turns green when the module is
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operational (online) and a link is established with another network device. If
no signal is detected, the LED labeled LINK turns off.
"Troubleshooting Supervisor Engines" section on
Chapter 5 Troubleshooting
5-6.
5-8.
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