Intel 10/100 manual General Problems

C H A P T E R 4 Intel Express 10/100 Fast Ethernet Switch

General Problems

If you’re having problems with the switch, follow the steps below:

1Verify that your cables are wired correctly. This is the most common problem. Use a UTP crossover cable to directly connect to a repeater or another switch. Use straight-through cables when connecting to servers or workstations. Try both the MDI and MDI-X connectors on port 1 if you’re unsure of which cable to use. See page 8 for more information.

2Make sure the unit is plugged into a functioning AC outlet. Also, make sure the voltage setting next to the switch’s power receptacle is set correctly. In the United States, Canada, and Japan the setting is 115. In most European and Asian countries, it’s 230.

3Review the switch’s Link LEDs to ensure the ports you believe should be functioning are properly configured and not disabled. Also, review the Link LEDs of other devices to ensure the ports that should be functioning are properly attached to the switch.

4Make sure devices connected to the switch are operating at the same speed as the switch port. Each switch port can be forced to either 10 or 100 Mbps (although auto-detect is the default). Also, other devices connected to the switch may be capable of operating at 10 or 100 Mbps. See page 66 for information on setting speed.

5If you configured a port for full duplex, make sure the device on the other end is configured for full duplex and is capable of transmitting in full duplex. Repeaters/hubs/concentrators can’t operate in full duplex mode.

6Make sure the equipment attached to the switch is properly configured. If the Coll LED is on continuously (and you don’t have full duplex configured), you may have an adapter problem.

7Use the Console Manager to check the switch’s status. Use the sys-statcommand to check overall system status and get-port-cfgto check the status of each port. To monitor traffic, use the switching statistics commands (see page 25).

8You can also use a protocol analyzer to check monitor statistics. If the port is configured in half-duplex mode, place a hub between the switch and the other device and attach the protocol analyzer to the hub. If the port is configured in full-duplex mode, place a tap between the device and switch and then attach a protocol analyzer to the tap. Contact your network services supplier for information on protocol analyzers and taps.

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