HP 100BaseT Podręcznik Użytkownika Pobierz pdf (Strona 38)

HP 100Base-T Hubs Installation and Reference Guide

2-6 Installing the System

Making a Connection via the MDI Cascade Port

The HP 100Base-T Hub is a

Class

I repeater. Class I

repeaters cannot be cascaded

to another hub in the same

collision domain.

The cascade port can only be

connected to another device

which breaks up the collision

domain (e.g., an Ethernet

switch).

Stackable Fast Ethernet hubs are generally restricted to Class I

repeater types due to the timing requirements for passing traffic

through the Stacking Cable. Although Class I repeaters cannot

be cascaded to another device in the same collision domain via

the cascade port, more powerful interconnection options are

provided via the hub’s Stacking Cable and optional Switch Port

Modules.

The MDI port can only be connected to another device which

breaks up the collision domain (e.g., an Ethernet switch).

Prepare straight-through 100

W Category 5 shielded or

unshielded twisted-pair cables with RJ-45 plugs at both ends.

Connect one end of the cable to the

12MDI/24MDI port on this

hub, and the other end to a standard MDI-X station port on the

other device. Remember that when using the cascade port

(

12MDI/24MDI), hub port 12MDI-X/24MDI-X cannot be used.

When inserting an RJ-45 plug, be sure the tab on the plug

clicks into position to ensure that it is properly seated.

Notes:

1. Make sure the length of twisted-pair cable does not exceed 100 meters.

2. To connect to another device (i.e., anything other than a repeater),

you may also run straight-through twisted-pair cabling from an

MDI-X port on this hub to an MDI port on the other device.

However, if you must connect to another device via station ports at

both ends of the cable, use crossover cabling.

Connecting to a Switch Port Module

The AdvanceStack Hub-12TX/Hub-12TXM includes a network

Expansion Slot on the front panel that supports connection to

10/100Base-TX or 100Base-FX. The 10/100TX Switch Port

Module acts as a two-port switch that can forward and filter

data frames at media speed. One port is connected to the hub’s

internal repeater bus, while the other port (on the hub’s front

panel) can be used to connect the hub to any compatible

network device. The optional Switch Port Modules include:

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