Nortel Networks 1000ASE-XD User Manual

Using the BayStack 420 10/100/1000 Switch

This chapter describes how to isolate and diagnose problems with your BayStack 
420 Switch and covers the following topics:

•

,” next

•

— Normal power-up sequence

— Port connection problems

The chapter topics lead you through a logical process for troubleshooting the 
BayStack 420 Switch. For example, because LEDs provide visual indications 
of certain problems, see 

 to understand the 

various states (

) that your switch LEDs can exhibit during normal 

operation.

For more help in determining the problem, 

 describes symptoms and corrective actions (

) you can 

perform to resolve specific problems. Subsequent sections give step-by-step 
procedures to correct the problems.

 shows the BayStack 420 Switch LED display panel. 

 describes 

the LEDs.