Fast Ethernet: Configuration Guidelines
Connectivity Rules
Fast Ethernet technology comes with its own set of planning considerations. Although similar to 10BASE-T Ethernet, the architectural differences between the two technologies do require a new awareness of how a Fast Ethernet network should be designed. Some basic rules include:
- The maximum length of a twisted-pair segment (distance from a shared port on a repeater to a PC, server, or LAN switch) is 100 meters (same as 10BASE-T).
- The maximum diameter of a collision domain (the distance between two end stations) is 205 meters using two Class II repeaters and 200 meters using one Class I repeater.
- Between any two PCs or other stations on the network, there may up to:
- three segments and two Class II repeaters, or
- two segments and one Class I repeater.
Fast Ethernet Configuration Guidelines |
|---|
| Physical Layer |
Max Segment Length |
Max Number of Repeaters |
| 100 Base-TX |
100m (328 ft) |
2 |
| 100 Base-T4 |
100m (328 ft) |
2 |
| 100Base-FX |
412m (1351 ft) |
2 |
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