Stackpower Cabling Configurations - Cisco Catalyst 3850 Hardware Installation Manual

Switch Installation
Before connecting the switches in a power stack, keep in mind these guidelines:
• A switch power stack can include a maximum of four switches in a ring topology and nine switches in
• Size of the switch and any optional power supply module. The 1100-W power-supply module is 1.5
• Length of cable. Depending on the configurations that you have, you might need different-sized cables.
• For rack-mounted switch stacks that are members of a data stack and a StackPower stack, see

StackPower Cabling Configurations

This section describes the recommended cabling configurations for a StackPower stack. There are two types
of StackPower cables.
The cable in the figure connects a switch to another switch in a power stack or with an XPS. StackPower
cables have color bands on the cable ends:
• The cable end with the green band can connect only to a switch.
• The cable end with the yellow band can connect to a switch or an XPS.
The cable is available in two lengths.
Part Number
CAB-SPWR-30CM
CAB-SPWR-150CM
Figure 24: StackPower Cable for Use with Cisco Catalyst 3850 Series Switches
This figure shows a ring configuration using both of the supplied 0.3-meter StackPower cables and one
1.5-meter cable. In the examples that follow, the switches are stacked in a vertical rack or on a table.
OL-26779-05
a star topology.
inches (3.81 cm) longer than the other modules, and with the attached cable retention clip, it extends 3
inches (7.62 cm) from the switch chassis. Stacking switches with the same power-supply modules together
makes it easier to cable the switches. For switch dimensions, see Appendix A, "Technical Specifications."
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
Connector, on page 30. The
recommended configurations.
Stacking and Power Stacking Guidelines, on page 37
StackPower Cabling Configurations, on page 41
Cable Type
StackPower Cable
StackPower Cable
Catalyst 3850 Switch Hardware Installation Guide

StackPower Cabling Configurations

StackPower
provides examples of
Switch
Length
0.3 meter
1.5 meter
41