10
Powering Considerations
Consider the following guidelines before you power the switches in a stack:
Note Stack master elections occur over a 10-second timeframe on switches running releases earlier
than Cisco IOS Release 12.2(20)SE3.
For more information on stack master elections, see the “Managing Switch Stacks” chapter
in the switch software configuration guide.
•
The sequence in which the switches are
initially powered on might affect the switch
that becomes the stack master.
• If you want a particular switch to become the
stack master, power on that switch first. This
switch becomes the stack master and remains
the stack master until a master re-election is
required. After 20 seconds, power on the
remaining switches in the stack.
• If you have no preference for which switch
becomes the stack master, power on all the
switches in the stack within a 20-second
timeframe. These switches participate in the
stack master election. Switches powered on
after the 20-second timeframe do not
participate in the election.
• Power off a switch before you add it to or
remove it from an existing switch stack.
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