Cisco Systems WSC4500X24XIPB, WSC4500XF32SFP manual Using LEDs to Identify Startup Problems

Chapter 5 Troubleshooting

Using LEDs to Identify Startup Problems

Using LEDs to Identify Startup Problems

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:

Step 1 Check the power supply LEDs:

•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 5-6.

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

Step 2 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 5-8.

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, connect a console to the management port and use the show environment command to check for possible problems. For more information, see the “Troubleshooting Supervisor Engines” section on page 5-13.

•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.

	Catalyst 4500 Series Switches Installation Guide
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