Intel PCLA2152B manual Troubleshooting, No link green LED is off, Intermittent loss of link

Troubleshooting

No link (green LED is off).

•Remove the cable and plug it in again. Wait up to six seconds for a link.

•If you’re using the wrong type of cable, either straight-through or crossover, the green LED above the port will not come on. Use the other type of cable.

•Make sure the device you’ve connected to a port is a 10BASE-T or 100BASE-TX device. The Express 10/100 Stackable Hub doesn’t support 100BASE-T4 devices running at 100 Mbps. However, it does support T4 devices running at 10 Mbps.

No link, amber LED above port is blinking slowly.

The hub speed setting doesn’t match the attached device’s speed setting. To correct the problem, change either the hub or device speed setting so they match. Remember, all hub ports operate at the same speed. You can’t connect both 10BASE-T and 100BASE-TX devices to the same hub.

Link, but amber LED above port is blinking erratically.

The port was partitioned (auto-disabled). This condition is usually caused by a malfunctioning network adapter, bad cable, or an overloaded network segment. See page 10 for more information.

Intermittent loss of link.

•If hubs are operating in a 100 Mbps environment, make sure you use an Intel Cascade Cable to connect the hubs. You can use TPE cabling only when connecting hubs running at 10 Mbps.

•Make sure the device connected to the hub port is configured for half duplex operation. Hubs operate at half duplex only.

•A cable segment somewhere in your collision domain is too long. Make sure none of your TPE cabling is longer than 100 meters.

•Make sure your stack of hubs contains no more than eight hubs.

•You may be using the wrong grade of cable. If you are, you will experience intermittent performance and you may eventually lose the connection between the port and the attached device. For more information, see page 12.

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