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CAUTION: The Switch has no ON/OFF switch. The only way to power on and power off the Switch is by connecting and disconnecting the power cord. This is called “power cycling”.
To power on the Switch:
1Plug the power cord into the power socket on the rear panel of the Switch. Refer to “(9) Power Socket” on page 15 for more information.
2Plug the other end of the power cord into a power outlet.
When the Switch is powered on, the Power LED lights up. If the Power LED does not light up, refer to “(7) Power LED” on page 15 for more information.
Checking for Correct Operation
After you power on the Switch, it automatically performs a
When POST is complete, the Power LED turns green. If the Power LED turns yellow after POST, it means that POST failed and the Switch has entered
The following summarizes the possible colors for the Power LED after POST.
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| Supplying Power to the Switch | 21 | |
Table 8 Power LED POST Indications |
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Status | Meaning |
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Green | The unit is powered on and ready to use. |
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Yellow |
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| Switch is in |
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| port or ports fail when the Switch was powered |
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| on. |
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Off | The unit is not receiving power: |
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| ■ | Verify that the power cord is connected cor- |
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| rectly, and then try powering on the Switch |
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| again |
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| ■ | If the Switch still does not operate, contact |
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| your 3Com network supplier |
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If POST fails, try the following:
■Power off the Switch, and then power it on again. Check the Power LED and see if POST was successfully completed.
■Reset the Switch. See “Resetting to Factory Defaults” on page 75.
CAUTION: Resetting the Switch to its factory defaults erases all your settings. You will need to reconfigure the Switch after you reset it.
If these do not resolve the issue:
■Check the 3Com Knowledgebase for a solution. To visit the 3Com Knowledgebase Web site, start your Web browser, and then enter http://knowledgebase.3Com.com.
■Contact your 3Com network supplier for assistance.