Chapter 2 Switch Installation
Planning a StackPower Stack (Catalyst
Figure 2-7 Example of a Partitioned Data Stack with a Failover Condition
STACK 1 | STACK 2 |
1 STACK 1 | STACK 2 |
2 STACK 1 | STACK 2 |
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Power On Sequence for Switch Data Stacks
Consider these guidelines before you power on the switches in a stack:
•The sequence in which the switches are first 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
•If you have no preference as to which switch becomes the stack master, power on all the switches in the stack within 1 minute. These switches participate in the stack master election. Switches powered on after 1 minute do not participate in the election.
•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
Planning a StackPower Stack (Catalyst 3750-X Switches)
Catalyst
•StackPower Stacking Guidelines, page
•StackPower Cabling Configurations, page
•Installing the Switch, page
StackPower Stacking Guidelines
You can configure a StackPower stack for either power sharing or redundancy. In
In redundant mode, when the total power budget of the stack is calculated, the wattage of the largest power supply is not included. That power is held in reserve and used to maintain power to switches and attached devices when one power supply fails. Following the failure of a power supply, the StackPower mode becomes power sharing.
Note
Catalyst
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