Troubleshooting

Interpreting LED Error Patterns

Interpreting LED Error Patterns

When power to the router is cycled or the Reset button is pushed, LED error patterns have the meanings shown in table 3-1 below.

Table 3-1. LED Error Patterns During Initialization

 

Initialization Fault LED Patterns

 

Diagnostic Tips

Power

Self-test

Fault

Net Fail

 

 

 

 

 

 

Unlit

1

1

1

Check power cord and power source. If they are OK, replace

 

 

 

 

 

 

 

the router.

Lit

Lit

Lit

All

Router hardware failure detected during self-test. Replace

 

 

 

Unlit

router.

Lit

Lit

Lit

All Lit

While Reset button pressed or when power is first applied,

 

 

 

or

this pattern is normal. If Reset is not pressed, router

 

 

 

Flashing

hardware failure detected during self-test. Replace router.

Lit

Lit

Lit

Some, but

Ports whose Net Fail LEDs are Lit are faulty. Replace router.

 

 

 

not all, Lit

Ports whose Net Fail LEDs are unlit may be usable.

Lit

Flashing

Flashing

Flashing

You have pressed the Reset and Clear buttons for too long to

 

 

 

 

clear the configuration. Release them. Press them again

 

 

 

 

briefly if clearing configuration is desired.

Lit

Lit

Unlit

Unlit

After (1) Reset and Clear buttons are held down, then (2)

or

or

 

 

Reset button is released, this pattern is normal.

Flashing

Flashing

 

 

 

1This LED is not important for the diagnosis.

After the self-test has passed successfully, LED error patterns have the meanings shown in table 3-2 on the next page.

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