The stack ID uniquely identifies the stack; all
members of the stack have the same stack ID. A
switch is considered to be a part of a stack
When it has the same stack ID as the stack
commander. The stack ID is valid only when
hpStackSwitchAdminStatus is true (1). This
value is set by the first elected commander and
stays with the stack until the user sets the
hpStackSwitchAdminStatus to 'false (2)' or when
hpStackSetStacking is set to 'true (1)' in an
inactive fragment.