Installation and Reference Guide HP AdvanceStack 100Base-THub-12TX, Hub-12TXM, and Switch Modules 1997-06

HP Hub-12TX/Hub-12TXM Installation and Reference Guide
iv Quick Installation
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 Return.
Select the Hub Configuration option from the System
Configuration menu and press Return. Then select a hub
from the Hub Selection menu and press Return. The system
displays the Hub Configuration screen. In the Isolate field,
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, go to the Isolate field in the Status
section of the Main Configuration menu, use <Ctrl+N> to
set the field with a value of Yes. 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.