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24 CHAPTER 2: INSTALLING THE SWITCH
Stack renumbering occurs when another Switch 4200 Family unit is
added to the bottom of an established stack except when the stack is
already 4 units high. In this instance the ‘down’ port on the bottom unit
of the existing stack will be disabled and its LED will flash green. You will
then not be able to use that port again until the link is lost on that port.
When another Switch 4200 Family unit is added to the top of an
established stack, no stack renumbering occurs. If however the unit being
added takes the stack height above 4 then the ‘up’ port on the top unit
of the existing stack will be disabled and its LED will flash green. You will
then not be able to use that port again until the link is lost on that port.
When removing a Switch from a stack, note the following:
■ Removing a Switch 4200 Family unit from the bottom of an existing
stack will cause the remaining stack to renumber.
■ Removing a Switch 4200 Family unit from the middle of an existing
stack will cause the other Switches in the stack to divide into two
stacks. Units below the unit removed will not renumber, units above
will renumber.
■ Removing a Switch 4200 Family unit from the top of an existing stack
will have no effect on the remaining stack.
If you are having problems, refer to “Solving Stack Formation Problems”
on page 56.
The Power-up
Sequence
The following sections describe how to get your Switch 4200 Family
powered-up and ready for operation.
Powering-up the
Switch 4200 Family
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.
DUA1730-0AAA03.book Page 24 Thursday, November 17, 2005 12:17 PM