Nortel Networks 450 manual Chapter Troubleshooting

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.

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).

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.

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