Dell PowerConnect 3024 User Manual page 55

Troubleshooting
This section explains how to isolate and diagnose problems with the switch. If you have a problem that is not listed here and you can not solve it, please
contact your supplier.
LEDs
The following sections discuss troubleshooting associated with the LEDs:
All LEDs are off
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Check the following:
The cable to connect the switch. Ensure that you're using an RJ-45 (network) cable and not an RJ-11 (telephone) cable.
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Ensure that the power cord is firmly connected to the relevant switch unit and to the supply outlet. If the connection is secure and there is still no
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power, you may have a faulty power cord.
Verify that there is sufficient space for adequate airflow on both sides of the switch.
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NOTE: Operating temperature for the switch must not exceed 40 ºC.
The switch should not be placed in the direct sunlight or near warm air exhausts or heaters.
On powering-up, the Self-test LED lights orange.
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The relevant switch unit has failed its power on Self-test because of an internal problem. See
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Ports
The following section discusses troubleshooting associated with ports:
Port does not work
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Check the following:
The cable connections are secure and the cables are connected to the correct ports at both ends of the link.
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The port status is configured at "Enable" and the auto-negotiation feature is enabled at the switch. See
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Interfaces
The following sections discuss troubleshooting related to the switch interfaces:
The terminal cannot access the switch
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Check the following:
Your terminal is correctly configured to operate as a VT100 terminal.
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You are using a proper null modem cable.
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The settings on your terminal are correct. See "Installation" for more information.
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The Web browser cannot access the switch
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Check the following:
The IP information for the switch is correctly configured.
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The switch is powered-up.
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Technical Specifications
Standards
Ethernet types supported
Other standards supported
Interfaces
10/100BASE-T ports
10/100/1000BASE-T ports
GBIC slots
Gigabit stacking ports
RS232 connector
Indicators
IEEE 802.3 Type 10Base-T, IEEE 802.3u Type 100
Base-TX, IEEE 802.3z, IEEE 803.ab
IEEE 802.3x, IEEE 802.1d, IEEE 802.1q, IEEE 802.1p,
IEEE 802.3ad
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"Technical Assistance" for more information.
"Port Manager" for more information.