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4-1

Troubleshooting

This chapter describes how to troubleshoot your HP E2620 Switches. This

document describes troubleshooting mostly from a hardware perspective.

You can perform more in-depth troubleshooting on these devices using the

software tools available with the switches, 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 “Troubleshooting” in the Management and Configuration Guide,

which is on the HP Web site at

www.hp.com/networking/support,

(see page 1-14).

This chapter describes the following:

■ basic troubleshooting tips (page 4-1)

■ diagnosing with the LEDs (page 4-4)

■ proactive networking tools (page 4-9)

■ hardware diagnostic tests (page 4-10)

■ restoring the factory default configuration (page 4-12)

■ downloading new software to the E2620 Switches (page 4-13)

■ HP Customer Support Services (page 4-13)

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 operates 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.

Questions and Answers:

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HP E2620 Specifications

General