Installation guide

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Catalyst 3750 Switch Hardware Installation Guide
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Chapter 3 Switch Installation
Planning the Stack
Powering Considerations
Consider the following guidelines before you power the switches in a stack:
• 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 approximately 10 seconds
power on the remaining switches in the stack.
• If you have no preference as to which switch becomes the stack master, power
on the all the switches in the stack within a 10-second timeframe. These
switches participate in the stack master election. Switches powered on after
the 10-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.
Note For conditions that can cause a stack master re-election or to manually elect the
stack master, refer to the “Managing Switch Stacks” chapter in the switch
software configuration guide.