Switch Stacking and Power Stacking Guidelines
Before connecting the switches in a stack, keep in mind these stacking guidelines:
• Size of the switch and any optional power-supply module. The 1100-W power-supply module is longer
than the other modules. Stacking switches with the same power-supply modules together makes it easier
to cable the switches.
• 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 StackWise cable, the 0.5-meter cable is supplied. If you need the
1-meter cable or the 3-meter cable, you can order it from your Cisco supplier. For cable part numbers,
see StackWise Ports, on page 15. The Data Stack Cabling Configurations, on page 26 provides examples
of recommended configurations.
• For rack-mounted switch stacks that are members of a StackPower stack as well as a data stack, see
Planning a StackPower Stack, on page 29.
• You can create data stacks with up to eight switches in a stack.
Data Stack Cabling Configurations
This is an example of a recommended configuration that uses the supplied 0.5-meter StackWise cable. In this
example, the switches are stacked in a vertical rack or on a table. This configuration provides redundant
connections. The configuration example uses the supplied 0.5-meter StackWise cable. The example shows
the full-ring configuration that provides redundant connections.
Figure 9: Data Stacking the Switches in a Rack or on a Table Using the 0.5-meter StackWise Cables
This example shows a recommended configuration when the switches are mounted side-by-side. Use the
1-meter and the 3-meter StackWise cables to connect the switches. This configuration provides redundant
connections.
Figure 10: Data Stacking in a Side-by-Side Mounting
Data Stack Bandwidth and Partitioning Examples
This section provides examples of data stack bandwidth and possible data stack partitioning. The figure shows
a data stack of switches that provides full bandwidth and redundant StackWise cable connections.
Cisco Catalyst 9300 Series Switches Hardware Installation Guide
26
Switch Installation
Switch Stacking and Power Stacking Guidelines
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