D-Link DFE-2600 Series User Manual page 54

Dual-Speed Stackable Hubs User's Guide
The figure below shows a stack divided into three separate collision do-
mains. Hubs three and four are isolated from the main segment (collision
domain one) using the hub's segmentation capability, putting them into
their own isolated collision domains two and three respectively. A switch,
bridge or router can be used to connect the three collision domains so that
traffic can pass between them, yet keeping them isolated to reduce conges-
tion on each segment.
For information about segmenting hubs using the network management
module for the hub, see the " Hub Stack Management: Controlling Hubs in
the Hub Stack" section later in this chapter.
NOTE: Hub segmentation is controlled by the master
hub. When the master hub completes its ini-
tialization, it will restore any prior segmentation
of the hubs. Therefore, if you are using a
switch or bridge to join different segments, be
sure to enable the IEEE 803.1d Spanning
Tree Protocol to prevent temporary network
loops
42 Master Hub Setup and Management