Cisco WS-C3750X-24T-S Hardware Installation Guide - Page 109
Connecting to an SFP Module Port, Troubleshooting
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Chapter 3 Switch Installation Connecting to an SFP Module Step 1 When connecting to servers, workstations, and routers, insert a four twisted-pair, straight-through cable in the RJ-45 connector. When connecting to switches or repeaters, insert a four twisted-pair, crossover cable. Note When connecting to a 1000BASE-T device, be sure to use a four twisted-pair, Category 5 cable. Figure 3-42 Connecting to an SFP Module Port 13 13X 14 15 16 17 18 19 20 21 22 23 24 23X 14X 24X Catalyst 3750 SERIES 1 2 97348 1 1 RJ-45 connector Step 2 Step 3 Step 4 Insert the other cable end in an RJ-45 connector on a target device. Observe the port status LED. The LED turns green when the switch and the target device have an established link. The LED turns amber while the STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green. If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be problem with the adapter installed in the target device. See Chapter 4, "Troubleshooting," for solutions to cabling problems. If necessary, reconfigure and restart the switch or target device. 78-15136-02 Catalyst 3750 Switch Hardware Installation Guide 3-49