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