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4-1

Troubleshooting

This chapter describes how to troubleshoot your switch. This document

describes troubleshooting mostly from a hardware perspective. You can

perform more in-depth troubleshooting on the switch using the software tools

available with the switch, including the full-featured console interface, the

built-in web browser interface, and ProCurve Manager, the SNMP-based

network management tool. For more information, see the chapter “Trouble-

shooting” in the Management and Configuration Guide, which is on the

ProCurve Website at www.procurve.com/manuals.

This chapter describes the following:

■ Basic Troubleshooting Tips (page 4-1)

■ Diagnosing with the LEDs (page 4-4)

■ Proactive Networking Tools (page 4-8)

■ Hardware Diagnostic Tests (page 4-9)

■ Restoring the Factory Default Configuration (page 4-11)

■ Downloading New Switch Software (page 4-12)

■ HP Customer Support Services (page 4-12)

Basic Troubleshooting Tips

Most problems are caused by the following situations. Check for these items

first when starting your troubleshooting:

■ Connecting to devices that have a fixed full-duplex configuration.

The RJ-45 ports are configured as “Auto”. That is, when connecting to

attached devices, the switch will operate in one of two ways to determine

the link speed and the communication mode (half duplex or full duplex):

• If the connected device is also configured to Auto, the switch will

automatically negotiate both link speed and communication mode.

• If the connected device has a fixed configuration, for example

100 Mbps,

at half or full duplex, the switch will automatically sense

the link speed, but will default to a communication mode of half

duplex.

HP J9148A User Manual

Questions and Answers: