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Catalyst 3850 Switch Hardware Installation Guide
OL-26779-02
Chapter 2 Switch Installation
StackPower Cabling Configurations
• Size of the switch and any optional power supply module. The 1100-W power-supply module is
1.5 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.”
• 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” section on page 1-22. The “StackPower Cabling Configurations”
section on page 2-9 provides examples of recommended configurations.
• For rack-mounted switch stacks that are members of a data stack and a StackPower stack, see the
“Switch Stacking and Power Stacking Guidelines” section on page 2-5.
StackPower Cabling Configurations
This section describes the recommended cabling configurations for a StackPower stack.
The cable in Figure 2-7 connects a Catalyst 3850 switch to another Catalyst 3850 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 Catalyst 3850 switch.
• The cable end with the yellow band can connect to a Catalyst 3850 switch or an XPS.
The cable is available in two lengths.
Figure 2-7 StackPower Cable for Use with Catalyst 3850 Switches
Table 2-1 StackPower Cables
Part Number Cable Type Length
CAB-SPWR-30CM StackPower cable 0.3 meter
CAB-SPWR-150CM StackPower cable 1.5 meter
