HP E2620, Installation And Getting Started Manual

Page: 65 / 116

4-1
4
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.