14
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.
