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Sample Topologies

Following are two simple sample topologies that may give you some ideas on how a backup

link could be used in your network.

Sample 1: EtherTwist Hub-to-EtherTwist Hub

In this sample topology, the primary and backup links consist of twisted-pair cable

segments between an HP EtherTwist Hub Plus/48 and an HP EtherTwist Hub Plus.

Wiring Closet 1 Wiring Closet 2

primary link

backup link

EtherTwist

Hub

EtherTwist

Hub

EtherTwist

Hub

10:10 LAN

Bridge

EtherTwist

Hub

EtherTwist

Hub/48

to another network

E-6 Backup Links

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 101 102

HP EtherTwist 1
Hub and Hub Plus 1
HP 28684B Hub/12 3
HP 28688B Hub Plus 3
HP 28699A Hub Plus/48 3
What Is In This Guide 4
Contents 5
Hub Plus, and Hub Plus/48 9
Features (continued) 10
Included Parts 11
Front of the Hub 12
Back of the Hub 13
How the Hub Works 14
Auto-Segmentation 15
Link Beat 15
Installation 19
1. Mount the hub 20
Straight out 24
Connecting Computers 26
Connecting Other Hubs 27
Port Connections 28
ThinLAN Port 30
AUI Port 31
Console Connection 32
Configuration Commands 35
Operation 37
Troubleshooting 47
Diagnosing With the LEDs 49
Diagnostic Tests 50
Testing Twisted-Pair Cabling 51
Cables and Connectors 53
HP Cables 54
Other Standard Cables 55
Straight-through cable 56
Crossover cable 57
Thin LAN Cable Requirements 58
AUI Cable 59
RS-232-C “Crossover” Cable 61
RS-232-C Cable for HP 110 62
Null-Modem Adapter 62
RS-232-C Modem Cable 63
Specifications 65
Modem Configuration 69
Black Box V.32 9600 Async 70
Hayes 1200 Smartmodem 70
HP 28699A Only) 71
IPX Addressing Notes: 72
Using Assigned IP Addresses 72
Description 75
Limitations 76
Additional Notes 76
Configuring a Backup Link 77
Identifying the Backup Link 78
Reactivating the Primary Link 79
Sample Topologies 80
Safety Information 83
Symboles de sécurité 84
Hinweise zur Sicherheit 85
Simboli di sicurezza 86
ATTENZIONE 86
Símbolos de seguridad 87
Regulatory Statements 89
Declaration of 90
Conformity 90
Regulatory Statements 3 91
4 Regulatory Statements 92
Gewährleistung 94
Garantía 94
Garantie 94
Garanzia 94
Regulatory Information 101
Informacin reglamentaria 101
Printed in U.S.A 102
5090-2692 E0692 102

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