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HP 100Base-T Hubs Installation and Reference Guide

iv Quick Installation

12TXM), and ending at the In port on the last hub. No more

than five hubs can be connected via the Stacking Cable.

Note: When connecting hubs with the Stacking Cable, they are all

part of the same collision domain by default. Also if a Hub-12TXM

is present, all of the hubs are managed by it.

6. Isolate any hubs you want to remove from the stack’s

collision domain.

For the Hub-12TXM, use the Hub Configuration screen in

the VT-100 console interface. Select the System

Configuration option from the main menu and press Enter.

Select the Hub Configuration option from the System

Configuration menu and press Enter. Then select a hub from

the Hub Selection menu and press Enter. The system

displays the Hub Configuration screen. In the Isolate field,

press Enter and then use <Ctrl+N> to change the setting to

Yes. Then press Enter to save the new value. See Chapter 4

for more details on using the VT-100 console interface.

For the Hub-12TX/Hub-24TX, enter the command “i” in

the Status section of the Main Configuration menu, then

press “y” to confirm the change of isolation status. Press

Enter to save the new value.

7. Connect isolated hubs to the stack’s main collision domain.

You may do this in one of two ways.

If you have an optional 10/100TX Switch Port Module,

you can connect an isolated hub to other hubs in the stack,

while still segmenting the collision domains, using one of the

following two methods:

• Install the Switch Port Module in the isolated hub in

the stack. Run a connection from the 100Base-TX port

on the optional 10/100TX Switch Port Module on this

hub to any station port on a non-isolated hub in the stack.

Make sure you connect to an MDI port on the hub if you

are running off the MDI-X port on the module, or vice

versa.

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HP 100BaseT Guide de l'utilisateur Page 6