Planning A Stackpower Stack (Catalyst 3750-X Switches); Stackpower Stacking Guidelines - Kenwood 3750-X Hardware Installation Manual

Chapter 2 Switch Installation

Planning a StackPower Stack (Catalyst 3750-X Switches)

Catalyst 3750-X switches can share power by using the StackPower feature.
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StackPower Stacking Guidelines

You can configure a StackPower stack for either power sharing or redundancy. In power-sharing mode,
the power of all the power supplies in the stack is aggregated and distributed among the stack members.
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 Power-sharing mode is the recommended configuration for Catalyst 3750-X switches. The Catalyst
3560-X switches support only redundant mode.
For general concepts and management procedures for switch power stacks, see the switch software
configuration guide on Cisco.com.
Before connecting the switches in a power stack, keep in mind these guidelines:
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OL-19593-03
StackPower Stacking Guidelines, page 2-9
StackPower Cabling Configurations, page 2-10
Installing the Switch, page 2-15
A switch power stack can include a maximum of four switches in a ring topology and nine switches
in a star topology with the XPS 2200.
Size of the switch and any optional power supply module. The 1100-W power-supply module is
1.5 inches longer than the other modules, and with the attached cable retention clip, it extends
3 inches from the switch chassis. Stacking switches with the same power-supply modules together
makes it easier to cable the switches. For switch dimensions, see
Specifications."
Length of cable. Depending on the configurations that you have, you might need different-sized
cables. If you do not specify the length of the StackPower cable, the 0.3 meter cable is supplied. If
you need the 1.5 meter cable, you can order it from your Cisco supplier. For cable part numbers, see
the "StackPower Connector (Catalyst 3750-X Switches)" section on page
Cabling Configurations" section on page 2-10
For rack-mounted switch stacks that are members of a data stack and a StackPower stack, see the
"Switch Data Stacking Guidelines" section on page
Planning a StackPower Stack (Catalyst 3750-X Switches)
provides examples of recommended configurations.
2-5.
Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
Appendix A, "Technical
1-24. The "StackPower
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