20CHAPTER 3: CABLING COREBUILDER 9400 PORTS
Cabling Gigabit Ethernet Ports
Before you cable the system, consider this Caution.
CAUTION: You may not want to connect the network cables before you power on the system (chapter 4) if you need to configure trunks, resilient links, or the Spanning Tree Protocol (STP). To avoid bridge loops, configure trunks, resilient links, and STP using the Administration Console before you connect the cables and after you power up the system. See the Command Reference Guide and the Implementation Guide for your system.
Guidelines for Gigabit Ethernet Cabling
For all Gigabit Ethernet cabling, keep the ports and connectors free of dust. See “Cleaning Dirty Fiber Optic Ports and Connectors” on page 40 for details.
Recommended Distances for 1000BASE-SX Ports or Transceivers
When you cable 1000BASE-SX ports or transceivers, verify that the length of the fiber cable from the system to any attached device does not exceed these recommended distances:
■Use 62.5-micron MMF fiber with a modal bandwidth specification of 160 MHz*km for distances of up to 220 m (722 ft).
■Use 62.5-micron MMF fiber with a modal bandwidth specification of 200 MHz*km for distances of up to 275 m (902 ft).
■Use 50-micron MMF fiber with a modal bandwidth specification of 400 MHz*km for distances of up to 500 m (1645 ft).
■Use 50-micron MMF fiber with modal bandwidth specification of 500 Mhz*km for distances of up to 550 m (1805 ft).
Recommended Distances for 1000BASE-LX Transceivers
When you cable 1000BASE-LX transceivers, verify that the length of the fiber cable from the system to any attached device does not exceed these recommended distances:
■Use 62.5-micron MMF fiber with a modal bandwidth specification of 160 MHz*km for distances of up to 550 m (1805 ft).
■Use 62.5-micron MMF fiber with a modal bandwidth specification of 200 MHz*km for distances of up to 550 m (1805 ft).
■Use 50-micron MMF fiber with a modal bandwidth specification of 400 MHz*km for distances of up to 550 m (1805 ft).
■Use 50-micron MMF fiber with a modal bandwidth specification of 500 MHz*km for distances of up to 550 m (1805 ft).
■Use 9-micron SMF fiber for distances of up to 10 km (6.2 mi). The specification requires and specifies 5 km (3.1 mi).
Use a conditioned launch cable to connect the 1000BASE-LX transceiver to multimode fiber. Using this cable ensures reliability over the maximum 550 m distance.
