consider the following guidelines before you power the switches in a stack:

    1?the sequence in which the switches are initially powered on might affect the switch that becomes the stack master.

    2?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.

    3?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.

    4?power off a switch before you add it to or remove it from an existing switch stack.

    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.