Troubleshooting and Maintenance Manual
Page 18
LED Reference Information
Firmware Operation and Port Activity LEDs
Emulex adapters have a POST test. Each port has a set of green and yellow LEDs (visible through
openings in the adapter's mounting bracket) that indicate the conditions and results of the POST.
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Green = firmware operation
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Yellow = port activity
Adapter LEDs also identify possible problems. For more information on LED states, see Table 1 on
page 21.
LEDs can help you locate:
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Bad cables
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Bad transceivers
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Bad switches or hub ports
LEDs can help you determine whether:
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The switch or hub is on
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The driver is loaded
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The driver reset the adapter
Common LED States
Although the adapter LED has many possible states, the three most common are:
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Normal, that is, the link is up
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Link-down or adapter waiting
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Heart-beat indication
Normal Link Up
A normal link up means that the driver is loaded and talking to the switch. Everything is operational.
1 Gb/s link up:
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For 1Gb/s adapters, a normal link up state is indicated with a solid green LED and a slow
blinking (1 Hz) yellow LED.
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For 2 Gb/s adapters, a solid green LED and a slow blinking yellow LED.
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For 4 Gb/s adapters, a solid green LED and a single blinking yellow LED.
2 Gb/s link up:
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For 2 Gb/s adapters, a solid green LED and a fast blinking yellow LED.
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For 4 Gb/s adapters, a solid green LED and a double blinking yellow LED.
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For 8 Gb/s adapters, a solid green LED and a fast double blinking yellow LED.
