
Fast Ethernet Stackable Hubs User’s Guide
Making Connections
19
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 ordi-
nary 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.
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 connection 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)
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