26 C
HAPTER
2: I
NSTALLING
THE
S
WITCH
3Com recommends that you initialize a Switch 4400 unit that has
previously been used elsewhere in your network before you add it to an
existing stack. If you do not initialize the unit, problems may be caused by
conflicting Switch configurations.
When the Switch 4400s are stacked together they are assigned a unit
number from bottom-to-top for management purposes. When further
switches are added to the stack, they can be positioned at the bottom of
the stack or at the top. Either way, the Switch management software will
re-order the Switch unit numbers into a logical order again (from bottom
to top).
The Power-up
Sequence
The following sections describe how to get your Switch 4400
powered-up and ready for operation.
Powering-up the
Switch 4400
Use the following sequence of steps to power-up the Switch.
1 Plug the power cord into the power socket at the rear of the Switch.
2 Plug the other end of the power cord into your power outlet.
The Switch powers-up and runs through its Power On Self Test (POST),
which takes approximately 10 seconds.
Checking for Correct
Operation of LEDs
During the Power On Self Test, all ports on the Switch are disabled and
the LEDs light in a set sequence.
When the POST has completed, check the Power/Self Test LED to make
sure that your Switch is operating correctly. Ta ble 7
shows possible colors
for the LED.
Ta b l e 7 Power/Self Test LED colors
If there is evidence of a problem, see “Solving Problems Indicated by
LEDs” on page 48.
Color State
Green The Switch is powered-up and
operating normally.
Yellow The Switch has failed its Power On Self
Test. This occurs if any of the ports fail
during power-up.
Off The Switch is not receiving power.
DUA1720-3AAA03_online.book Page 26 Monday, March 25, 2002 10:48 AM
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