Hub-To-Hub Uplink - D-Link DFE-916x User Manual

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 DEVICE
USED
Normal Switch or
Hub
Server (or PC)
Uplink Switch or
Hub
Server (or PC)
Making Connections
Dual-Speed Stackable Hubs User's Guide
PORT CABLE TO USE
TYPE
Non- Crossover (X)
Uplink
Uplink
Straight-Through (||)
Straight-Through (||)
Non-
Straight-Through (||)
Uplink
Uplink
Crossover (X)
Crossover (X)
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