Nortel-networks 450 User Manual download pdf (Page 227)

302401-D Rev 00

4-1

Chapter 4

Troubleshooting

This chapter describes how to isolate and diagnose problems with your

BayStack 450 switch.

This chapter covers the following topics:

• Interpreting the LEDs

• Diagnosing and correcting the problem

-- Normal power-up sequence

-- Port connection problems

The chapter topics lead you through a logical process for troubleshooting the

BayStack 450 switch. For example, because LEDs provide visual indications of

certain problems, see “

Interpreting the LEDs” on page 4-2 to understand the

various states (see Table 4-1

) that your switch LEDs can exhibit during normal

operation.

For more help in determining the problem, “

Diagnosing and Correcting the

Problem” on page 4-5 describes symptoms and corrective actions (see Table 4-2)

you can perform to resolve specific problems. Subsequent sections give

step-by-step procedures to correct the problems.

Note:

The LED Display panel configuration for your switch may be different

than shown in this section, depending on the date of manufacturing (see the

note in “10BASE-T/100BASE-TX Ports” on page 1-3).

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Nortel-networks 450 User Manual Page 227