Selecting Native and Alternate Stacking Ports

On switches that provide both native stacking ports and alternate stacking ports (described in Stacking Considerations for Each Switch Model), you can configure each logical stacking port to use either the native stacking port or the alternate stacking port. You can configure logical stacking ports to use any of the following physical stacking port configurations:

Two native stacking ports
Two alternate stacking ports
One native stacking port and one alternate stacking port

When the Stacking Port Selection Control option is enabled in a switch's configuration, you can choose between native and alternate stacking ports. The default selection is the native stacking ports.

To select between the native and alternate stacking ports, use the following command for each switch in the stack:
configure stacking-support stack-port [stack-ports | all] selection [native { | V160 |V320 | V400} | alternate]
Note
Not all options are available for all switches. Refer to Stacking Considerations for Each Switch Model for details.
To display the stacking and stacking-support configuration, use the following commands:

show stacking-support

show stacking stack-ports

show stacking {node-address node_address | slot slot_number} detail
To unconfigure the stacking-support feature, use the following command:
unconfigure stacking-support

Note
Commands that contain the stacking-support keyword apply to the local switch only. This means that each switch that will use alternate stacking ports must be configured separately. When the stack is fully active, you can use the telnet slot slot-number command to log in to another node over the stack to unconfigure SummitStack-V on that node only. There is no way to intentionally or accidentally unconfigure the stacking-support options on all nodes in a stack.
When the stacking-support feature has been configured as required on all nodes in a stack, reboot each node.
Run the show stacking stack-ports command to verify that the stack has been properly connected.