70
— 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 Troubleshooting, page 73 for solutions to cabling
problems.
4. If necessary, reconfigure and restart the switch or target device.
Connecting to a Dual-Purpose Port
The dual-purpose port is a single port with two interfaces, one for an RJ-45 cable and another for an SFP module. Only
one interface can be active at a time. If both interfaces are connected, the SFP module has priority. For more information
about dual-purpose ports, see the Power Connectors, page 15.
Warning: Class 1 laser product. Statement 1008
Caution: Do not remove the rubber plugs from the SFP module port or the rubber caps from the fiber-optic cable until
you are ready to connect the cable. The plugs and caps protect the SFP module ports and cables from contamination
and ambient light.
Caution: Before connecting to the SFP module, be sure that you understand the port and cabling stipulations in the
Preparing for Installation, page 27. See Cable and Connectors, page 85 for information about the LC on the SFP module.
To connect to a dual-purpose port, follow these steps:
1. Connect an RJ-45 connector to the 10/100/1000 port, or install an SFP module into the SFP module slot, and
connect a cable to the SFP module port. See Figure 44 on page 71.
For more information about RJ-45 connections, SFP modules, and optical connections, see the Connecting to
10/100 and 10/100/1000 Ports, page 62, the Installing and Removing SFP Modules, page 64, and the Connecting
to SFP Modules, page 68.
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