HP 10BASE-T User's Guide Page 113
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- Table of contents
- TROUBLESHOOTING
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Indications of Backup Link
Activation
When the primary link fails (“n” consecutive test packet responses were
not received on the primary port from the other hub), the backup link is
automatically enabled. The effect of this change is displayed on the
monitoring hub’s LEDs and management interface. Activation of the
backup link does not change the status of any of the ports on the remote
hub.
On the hub’s LEDs, the primary port LED goes off, and the backup port
LED goes on.
On the HP Stack Manager’s front panel display for the hub, the status of
the primary port changes from ON to OFF, and the backup port changes
from OFF to ON.
On HP Interconnect Manager, you can automatically monitor the status
of the backup link from the network management station. See your HP
Interconnect Manager documentation for more information.
On the ASCII terminal STatus command display, the primary port
(labeled pri) changes from ON to OFF, and the backup port (labeled
bkup) changes from OFF to ON.
Backup Links
Backup Links
D-6
- HP AdvanceStack 10Base-T Hubs 1
- All Rights Reserved 2
- Features 4
- (continued on next page) 4
- (continued) 5
- HP Customer Support Services 7
- Contents 8
- 3 Hub Reference 10
- 4 Troubleshooting 11
- A Cables and Connectors 12
- B Specifications 12
- C Network Addressing 12
- D Backup Links 13
- 10Base-T Hubs 14
- Installation Summary 15
- Installation Steps 16
- 2. Verify the Hub’s Operation 17
- 3. Mount the Hub 18
- 10-mm M4 19
- Important 20
- Mounting the Hub on a Wall 23
- to the Hub 24
- Distributed Management 26
- Network Port Connections 27
- 24681012 1357911 28
- 10Base-T 28
- 24681012 28
- Cable Management 32
- Installing and Using 38
- HP Stack Manager 38
- Software Description 39
- Computer Requirements 40
- Installing and Starting 41
- Communications Settings 43
- Connect/Disconnect 43
- Automatic Chain Display 44
- Online Help 44
- Port Status Display 44
- LAN Traffic Statistics 44
- Hub Identification 44
- Port Enable/Disable 45
- Port Counters 45
- Redundant Power Supply (RPS) 45
- Advanced Features 46
- IP Configuration 47
- Password 47
- Authorized Managers 48
- Backup Link 48
- Robust Port Control 48
- Network Tests 49
- Factory Reset 49
- Hub Reference 50
- Front Panel 51
- Back Panel 51
- Front of the hub 52
- How the Hubs Work 54
- Auto-Segmentation 55
- Link Beat 56
- Managing Your Hub — 57
- HP Distributed Management 57
- Chaining the Hubs 58
- Out-of-Band Management 58
- In-Band (Network) Management 58
- Security Features 59
- Port Security 60
- Authorized Managers List 60
- Optional Modules 61
- HP Transceiver Modules 63
- HP Router Module 64
- HP Dial-a-LAN Remote Access 66
- HP J2624A Dial-A-LAN 4A 67
- Firmware Enhancements 68
- Troubleshooting 70
- Troubleshooting Approaches 71
- Diagnosing with the LEDs 72
- LED Error Indications 73
- Installation Problems 75
- Cabling Problems 76
- Unusual Network Activity 77
- IP Configuration Errors 77
- Diagnostic Tests 78
- Testing Twisted-Pair Cabling 79
- Clearing a Password 80
- Customer Support Services 81
- CompuServe 83
- Cables and Connectors 86
- Recommended Cables 88
- Twisted-Pair Cable/Connector 89
- Pin-Outs 89
- Management Chaining 90
- (not a network connection) 90
- Hub-to-Hub Network Connection 91
- ThinLAN Cable Requirements 92
- AUI Cable Minimum Pin-Out 93
- RS-232 Connector and Cable 94
- RS-232-C “Null Modem” Cable 95
- (supplied with the hub) 95
- RS-232-C Modem Cable 95
- Specifications 96
- Network Addressing 100
- Communication Between the Hub 101
- IPX Addressing Notes: 102
- Networks 103
- Using BOOTP 105
- This tag must precede the 106
- For the HP 106
- Backup Links 108
- Description 109
- Limitations 110
- Additional Notes 110
- Configuring a Backup Link 111
- Identifying the Backup Link 112
- Indications of Backup Link 113
- Activation 113
- Reactivating the Primary Link 114
- Example Topologies 115
- Safety Information 119
- Symboles de sécurité 120
- Safety and Regulatory 120
- Statements 120
- Hinweise zur Sicherheit 121
- Simboli di sicurezza 122
- Símbolos de seguridad 123
- Regulatory Statements 125
- Declaration of Conformity 126
- *5964-4601* 136
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