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Dual-Speed Stackable Hubs User’s Guide
Making Connections 23
Hub-to-Hub Uplink
You can link two hubs or hub stacks to each other using any of the twisted-
pair ports or the Uplink port. Linking hubs using ordinary twisted-pair
ports requires crossover twisted-pair cables; linking using one ordinary
twisted-pair port and the Uplink port requires an ordinary straight-through
twisted-pair cable. The Uplink port is shared with Port 1, and you should
not use both Port 1 and the Uplink port at the same time.
When connecting two hubs or hub stacks in this fashion, the maximum
distance between any two end-stations in a collision domain is 205 meters.
If each link between the hub and an end-station is 100 meters, then the hub-
to-hub connection is limited to 5 meters. However, if the longest hub-to-
end-station connection is less than 100 meters, then the hub-to-hub connec-
tion can be up to 100 meters long as long as the 205-meter total network
diameter rule is followed.
The following table describes different methods of linking hubs (or hub
stacks):
HUB PORT
USED
DEVICE PORT
TYPE
CABLE TO USE
Normal Switch or
Hub
Non-
Uplink
Crossover (X)
Uplink
Straight-Through (||)
Server (or PC) Straight-Through (||)
Uplink Switch or
Hub
Non-
Uplink
Straight-Through (||)
Uplink
Crossover (X)
Server (or PC) Crossover (X)