Stack Unit Replacement

You can replace any stack unit except the active controller with a clean unit of the same model without entering any commands. Discovery and unit replacement are completed in approximately one to two minutes; however, additional time is required to reload the new unit.

To replace a unit, the following are required:

• The unit being replaced must have a static configuration. Use the show stack command as shown in the following procedures to check for an "S" next to the unit, indicating its configuration is static.
• The physical modules of the replacement unit must match one and only one provisional configuration, that is, a stored configuration without a physical unit present.
• The replacement unit must be a clean unit. You can convert a unit to a clean unit using the erase startup-config command followed by the reload command without saving any configuration.

Stack unit replacement is performed for one unit at a time to handle any setup.