Troubleshooting; Basic Troubleshooting Tips - HP ProCurve 224 Installation Manual

Troubleshooting

This chapter describes how to troubleshoot your Switch 212M and Switch
224M. Note that 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 TopTools for
Hubs & Switches, the SNMP-based network management tool. See chapter 8,
"Troubleshooting" of the HP ProCurve Switch 212M and 224M Management
and Configuration Guide included with your switch for more information.
This chapter describes the following:

Basic Troubleshooting Tips

Most problems are caused by the following situations:
basic troubleshooting tips (page 3-1)
diagnosing with the LEDs (page 3-3)
Proactive Networking tools (page 3-4)
Hardware Diagnostic tests (page 3-5)
HP Customer Support Services (page 3-7)
Incorrect switch-to-switch or switch-to-hub connections. If you
have connected your switch to another switch or a hub by using twisted-
pair cable from an RJ-45 MDI-X connector on your switch to the an MDI-
X connector on the other switch or hub, you must use a crossover cable.
If you have used a straight-through cable, the connection will not work.
The LED for the port you are using will not come on when you connect
the cable.
Most switch and hub ports are wired as MDI-X ports, so for these switch-
to-switch or switch-to-hub connections use a crossover cable. LAN
adapters in end nodes are normally wired as MDI ports as are some ports
on hubs and switches. For connections from the switch to these MDI
ports, use a straight-through cable. See appendix B, "Cables and
Connectors" for pinouts and correct cable wiring for crossover and
straight-through twisted-pair cables.
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3-1