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
Quick Installation vii
Make sure you connect the stack (main collision domain) to
the extended network. If you have hubs in the stack that are
isolated, be certain to use a station port of a hub that is NOT
isolated in order to connect the stack collision domain to the
extended network.
A network management station on the extended network
should be able to access a Hub-12TXM in the stack in order
to manage all the devices in the stack’s collision domain.
Make sure that the Hub-12TXM is NOT isolated, it should
be in the stack’s main collision domain and connected to the
extended network.