HP AdvanceStack 10Base-T Hub-12 User Manual

4 Troubleshooting
Troubleshooting Approaches . . . . . . . . . . . . . . . . . . . . . . 4-2
Diagnosing with the LEDs . . . . . . . . . . . . . . . . . . . . . . . . 4-3
LED Pattern During Self-Test . . . . . . . . . . . . . . . . . . . 4-3
LED Error Indications . . . . . . . . . . . . . . . . . . . . . . . 4-4
Installation Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Incorrect Installation . . . . . . . . . . . . . . . . . . . . . . . . 4-6
ASCII Console Connection Problems . . . . . . . . . . . . . . 4-6
Cabling Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Non-standard Cables . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Unusual Network Activity . . . . . . . . . . . . . . . . . . . . . . . . 4-8
IP Configuration Errors . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Testing the Hub Only . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Testing the Hub’s Ports and the Links . . . . . . . . . . . . . . 4-9
Testing Twisted-Pair Cabling . . . . . . . . . . . . . . . . . . . 4-10
Clearing a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . 4-12
Hewlett-Packard FTP Library Service . . . . . . . . . . . . . . 4-13
CompuServe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
HP FIRST Fax Retrieval Service . . . . . . . . . . . . . . . . . 4-15
HP Network Phone-In Support (NPS) . . . . . . . . . . . . . . 4-15
Contents
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HP AdvanceStack 10Base-T Hub-12 Specifications

General

Brand	HP
Model	AdvanceStack 10Base-T Hub-12
Category	Switch
Language	English