NETWORK PLANNING
Connectivity Rules
When adding hubs (repeaters) to your network, please follow the connectivity rules listed below for Ethernet, Fast Ethernet, and Gigabit Ethernet. However, note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices.
1000 Mbps Gigabit Ethernet Collision Domain
Maximum
Cable Type |
| Maximum Cable Length |
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Category 5, 5e | 100 m (328 ft) |
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Maximum |
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Fiber Diameter | Fiber Bandwidth | Cable Length Range |
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62.5/125 micron | 160 MHz/km |
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multimode fiber (MMF) |
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200 MHz/km |
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50/125 micron MMF | 400 MHz/km |
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| 500 MHz/km |
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Maximum
Fiber Diameter | Fiber Bandwidth | Cable Length Range |
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9/125 micron | N/A | 2 m - 5 km |
fiber (SMF) |
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Note: Although maximum cable length for