Moving a Unit to Another Stack
Moving a member from one stack to another stack can cause non-sequential ID assignment.
The active controller will honor the original ID of the newly added unit if the ID
is not already in use. The active controller assigns a new ID if the original ID is
already in use. You can user the
stack interactive-setup command to change the ID of the new unit. Refer to
Changing stack unit IDs with stack interactive-setup for more information.