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Troubleshooting
Dell™ PowerConnect™ 26
xx
Switches User's Guide
This section provides troubleshooting information for your switch.
Table 2
-1
describes general cluster problems you may encounter and the probable causes
and solutions.
Table 2-
1. Basic Troubleshooting
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Problem
Probable Cause
Corrective Action
Power LED is not lighted.
There is no power to the switch.
Confirm that the switch is connected to a properly functioning
and active power source.
Ensure that the power cable is securely connected to the
switch and to a power source.
Link LED is not lighted.
The cable is not securely connected to the switch or the
attached device.
Ensure that the connectors are fully inserted into the ports of
the switch and the attached device.
The attached device is not configured correctly, or it is not
powered on.
Ensure that the attached device is powered on. Verify that the
NIC on the attached device is operating properly.
The cable is damaged or not properly terminated.
Test the cable.
Try a known working cable.
Ensure that the cables are terminated using TIA 568A or 568B
standards.
The cable's maximum distance has been exceeded.
10Base-T, 100Base-T, and 1000Base-T cables have limitations
for link lengths. Move the connected device closer to the switch
and use a shorter cable.
Mismatched duplex mode.
Ensure that all devices connected to the switch are configured
to automatically detect and set port speed and duplex settings.
Bad switch port.
Reconnect the connector for the affected link to a different
switch port.
Link speed LED indicates a
lower speed than expected.
Incorrect cable grade.
Ensure that you are using Category 5 cable or better for all
10Base-T and 100Base-T links, or Category 5e for 1000Base-T
links.
Damaged cable.
Test any cables that have kinks, sharp bends, or appear to be
damaged.
The cable's maximum distance has been exceeded.
10Base-T, 100Base-T, and 1000Base-T cables have limitations
for link lengths. Move the connected device closer to the switch
and use a shorter cable.
Link LED is lighted, but the
activity (ACT) LED does not
blink.
There is no Ethernet traffic on the link. The LED blinks only
when traffic is being passed to or sent from a device that is
connected to the port.
No action required.
The attached device is not configured correctly.
Verify that the port or NIC on the attached device is operating
properly.
Link LED is lighted and the
FDX/HDX LED blinks
occasionally.
This can be normal link activity. Some collisions take place
during normal operation.
No action required.
Link LED is lighted and the
FDX/HDX LED blinks
frequently.
Mismatched duplex mode.
Ensure that any devices connected to the switch are set to
automatically detect and set port speed and duplex settings.
The link is reaching its maximum capacity.
Resegment the network to decrease the number of users on
the link.