Installing a new unit using static configuration

If the new unit is a clean unit and the connection is sequential, you can add the unit to a stack using the static setup process.

Enter the module configuration of the new unit into the active controller configuration.
Connect the new unit to the stack using the 10-Gbps stacking ports. The sequence in which you connect the unit must match the sequence in the active controller configuration. The active controller automatically resets the unit.
Once the new unit boots and joins the stack, enter the write memory command on the active controller. You should see a message similar to the following example.
```
Done hot swap: Set stack unit 3 to Fully-Operational:16
```

Configuration notes

Configuration of a new unit can be learned in the following ways.

If the active controller has no configuration information for the new unit, it learns the new unit's configuration. This is a dynamic configuration that disappears if the new unit leaves the stack. To retain the configuration on the active controller (to make it a static configuration), you must execute the write memory command on the active controller.
If the active controller has configuration information for a new unit that matches the base module (module 1) of the new unit, the new unit may be placed in the operational or configuration mismatch (non-operational) state depending on the matching of other modules. For example, if the active controller has configuration information for another module (such as module 3), but the new unit has no module 3, the new unit will be operational. However, if the new unit has a module 3, but it does not match the configured module type, the new unit will be non-operational due to configuration mismatch.
A user can return a configuration-mismatched unit to operation by configuring the no stack unit command for the non-operational unit from the active controller. This removes the entire stack configuration so the active controller can learn the configuration-mismatched unit as a new unit. The active controller triggers an election and learns the unit. Refer to Recovering from a stack unit configuration mismatch.