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 power-on self-test (POST). During POST, the Power LED on the front panel of the Switch flashes green.

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 fail-safe mode.

The following summarizes the possible colors for the Power LED after POST.

 

 

Supplying Power to the Switch

21

Table 8 Power LED POST Indications

 

 

 

 

 

 

Status

Meaning

 

 

 

 

 

 

Green

The unit is powered on and ready to use.

 

 

Yellow

Power-on self-test or loopback test failed. The

 

 

 

Switch is in fail-safe mode. This can happen if a

 

 

 

port or ports fail when the Switch was powered

 

 

 

on.

 

 

Off

The unit is not receiving power:

 

 

 

Verify that the power cord is connected cor-

 

 

 

 

rectly, and then try powering on the Switch

 

 

 

 

again

 

 

 

If the Switch still does not operate, contact

 

 

 

 

your 3Com network supplier

 

 

 

 

 

 

 

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.

Page 21
Image 21
3Com 2226-SFP, 2250-SFP, 2426-PWR manual Checking for Correct Operation, Status Meaning