HP J4865A User Manual - Page 51

Troubleshooting, Basic Troubleshooting Tips

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4 Troubleshooting This chapter describes how to troubleshoot your Series 4100gl Switches. This document describes troubleshooting mostly from a hardware perspective. You can perform more in-depth troubleshooting using the software tools available with the switch, including the full-featured console interface, the built-in web browser interface, and HP ProCurve Manager for Hubs & Switches, the SNMP-based network management tool. For more information, see the chapter on "Troubleshooting" in the Management and Configuration­ Guide that is on the documentation CD-ROM included with your switch. 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 code (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: ■ Faulty or loose cables. Look for loose or obviously faulty connections. If they appear to be OK, ensure the connections are snug. If that does not correct the problem, try a different cable. ■ Non-standard cables. Non-standard and miswired cables may cause network collisions and other network problems, and can seriously impair network performance. Use a new correctly-wired cable or compare your cable to the cable in appendix B, "Cables and Connectors" for pinouts and correct cable wiring. A category 5 cable tester is a recommended tool for every 100Base-TX and 1000Base-T network installation. 4-1 Troubleshooting

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4
Troubleshooting
This chapter describes how to troubleshoot your Series 4100gl Switches. This ±
document describes troubleshooting mostly from a hardware perspective. ±
You can perform more in-depth troubleshooting using the software tools ±
available with the switch, including the full-featured console interface, the±
built-in web browser interface, and HP ProCurve Manager for Hubs & ±
Switches, the SNMP-based network management tool. For more information,±
see the chapter on “Troubleshooting” in the
Management and Configuration-
Guide
that is on the documentation CD-ROM included with your switch.±
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 code (
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:
■
Faulty or loose cables.
Look for loose or obviously faulty connections.
If they appear to be OK, ensure the connections are snug. If that does not
correct the problem, try a different cable.
■
Non-standard cables.
Non-standard and miswired cables may cause
network collisions and other network problems, and can seriously impair
network performance. Use a new correctly-wired cable or compare your
cable to the cable in appendix B, “Cables and Connectors” for pinouts and
correct cable wiring. A category 5 cable tester is a recommended tool for
every 100Base-TX and 1000Base-T network installation.
Troubleshooting
4-1