Troubleshooting

Diagnostic Tools

Diagnostic ToolsDiagnostic Features

Feature

Default

Menu

CLI

Web

 

 

 

 

 

Port Auto negotiation

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n/a

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Ping Test

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page C-29

page C-28

Link Test

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page C-29

page C-28

Display Config File

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page C-31

page C-31

Admin. and Troubleshooting

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page C-33

Commands

 

 

 

 

Factory-Default Config

page C-34

page C-34

 

(Buttons)

 

 

 

Port Status

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pages B-8

pages B-8and

pages B-8and

 

 

and B-9

B-9

B-9

 

 

 

 

 

Port Auto-Negotiation

When a link LED does not light (indicating loss of link between two devices), the most common reason is a failure of port auto-negotiation between the connecting ports. If a link LED fails to light when you connect the switch to a port on another device, do the following:

1.Ensure that the switch port and the port on the attached end-node are both set to Auto mode.

2.If the attached end-node does not have an Auto mode setting, then you must manually configure the switch port to the same setting as the end- node port. See Chapter 9, “Optimizing Traffic Flow with Port Controls, Port Trunking, and Filters”.

C-26