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Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide
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Chapter 2 Switch Installation
Connecting to Dual-Purpose Ports
Step 3 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 3, “Troubleshooting,” for
solutions to cabling problems.
Step 4 If necessary, reconfigure and restart the switch or target device.
Connecting to Dual-Purpose Ports
You can configure the dual-purpose ports on the Cisco ME 3400G-12CS and Cisco ME 3400-2CS
switches as either 10/100/1000 ports or as SFP module slots. Figure 2-20 shows the
Cisco ME 3400G-12CS switch dual-purpose ports. This section also applies to the
Cisco ME 3400-2CS switches.
To connect to a dual-purpose port, follow these steps:
Step 1 Connect an RJ-45 connector or an SFP module to the port, as shown in Figure 2-20.
For more information about RJ-45 connectors and SFP modules, see the “Connecting to the 10/100 and
10/100/1000 Ports” section on page 2-20 and the “Connecting to SFP Modules” section on page 2-21.
Figure 2-20 Connecting to a Dual-Purpose Port
Step 2
Connect the other end of the cable to the other device. The switch automatically detects the connection
and configures the port.
By default, the switch detects whether an RJ-45 connector or SFP module is connected to a dual-purpose
port and configures the port accordingly. You can change this setting and configure the port to recognize
only an RJ-45 connector or only an SFP module by using the media type interface configuration
command. For more information, see the command reference.
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