IBM 8237, Инструкция по установке и эксплуатации

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Copyright IBM Corp. 1997
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Contents
Safety Information ............................................................................................. ix
Lithium Battery ................................................................................................ xiii
About This Manual ........................................................................................... xv
Who Should Read This Manual .......................................................................... xv
How This Manual Is Organized .......................................................................... xv
Technical and Planning References ................................................................... xvi
Chapter 1. Introduction and Planning ........................................................... 1-1
The 8237 ........................................................................................................... 1-1
Features ........................................................................................................ 1-2
Stacks ............................................................................................................ 1-4
Interconnecting Typical Ethernet Hubs .......................................................... 1-4
Interconnecting 8237s ................................................................................... 1-5
Understanding Expansion Ports ........................................................................ 1-6
Media Expansion Ports (MEPs) ..................................................................... 1-6
Fast Expansion Modules (FEMs) .................................................................. 1-6
Back-Pressure Flow Control .......................................................................... 1-7
Understanding Managed Stacks ....................................................................... 1-7
Inter-8237 Communications In Managed Stacks ........................................... 1-7
Why Segment 8237s within a Stack? ............................................................ 1-8
Segmenting 8237s within a Stack ................................................................. 1-8
Linking Segmented 8237s ............................................................................. 1-8
Assigning Backup Ports ..................................................................................... 1-9
Ethernet Planning .............................................................................................. 1-9
Maximum Segment Lengths ........................................................................ 1-10
Four Repeater Limit ..................................................................................... 1-10
Cables and Connectors ................................................................................... 1-10
Cabling Requirements for 10BASE-T Ports ................................................ 1-10
Cabling Requirements for the Expansion Ports ........................................... 1-11
Cabling Requirements for the Management Port ........................................ 1-12
Cabling Requirements for Stack Link .......................................................... 1-12
Protected Vital Configuration Data .................................................................. 1-12
Power Requirements and Characteristics ....................................................... 1-14
Physical Characteristics ................................................................................... 1-14
Operating Environment .................................................................................... 1-15
Space Requirements ................................................................................... 1-15
Environmental Requirements ...................................................................... 1-15
Acoustic Characteristics .................................................................................. 1-15
Documenting Your Installation ......................................................................... 1-16
Rack Document ........................................................................................... 1-16
Stack Document .......................................................................................... 1-16
Setup and Cabling Document ...................................................................... 1-16
Locator Document ....................................................................................... 1-16