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2
Network Planning
Remote Connections with Fiber Cable
Fiber optic technology allows for longer cabling than any other media type. A
1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a
1000BASE-LX (SMF) link up to 5 km, and a 1000BASE-LH link up to 70 km. This
allows a switch stack to serve as a collapsed backbone, providing direct connectivity
for a widespread LAN.
A 1000BASE-SX SFP transceiver can be used for a high-speed connection between
floors in the same building, and a 1000BASE-LX transceiver can be used for
high-bandwidth core connections between buildings in a campus setting. For
long-haul connections, a 1000BASE-LH SFP transceiver can be used to reach
another site up to 70 kilometers away.
The figure below illustrates three switches interconnecting multiple segments with
fiber cable.
Server Farm
Remote Switch
2-4
1000BASE-SX MMF
(500 m)
1
2
3
4
5
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10/100 Mbps Segments
...
Figure 2-3 Remote Connections with Fiber Cable
Headquarters
1
2
3
4
13
14
15
16
Remote Switch
1
13
14
...
5
6
7
8
9
10
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17
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1000BASE-LX SMF
(5 kilometers)
2
3
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9
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11
12
15
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19
20
21
22
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