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Troubleshooting
Diagnosing with the LEDs
Troubleshooting
Diagnosing with the LEDs
Most problems with the switch can be diagnosed using the LEDs on its front
panel. This section describes:
■ The normal LED pattern when the switch is being self-tested
■ The LED patterns that indicate error conditions on the switch
LED Pattern During Self-Test
Whenever the switch is powered on or reset, it performs a self-diagnostic test.
During the self-test:
1. All LEDs turn on momentarily, then all but the Power, Self-test, and Fault
LEDs turn off.
2. The Power LED remains on; the Self Test and Fault LEDs remain on for
less than one minute.
When the self-test completes successfully, the LEDs go into their normal
operational states. If a switch hardware fault exists, the switch will not
complete self-test. This will be indicated by the Fault LED.
The tables on the following pages list the switch’s LEDs, their possible states,
and diagnostic tips to resolve any error conditions.
LED Error Indications
Figure 9-1. System and Port LEDs
System LEDs
Port LEDs
SEDONA.BK : sed_9.fm5 Page 2 Thursday, February 27, 1997 10:11 AM