Indicates how readily a stack member can take over as master if the current stack master were to fail. Possible values are: init (1) - the stack member is completing startup initialization. syncing (2) - the stack member is synchronizing state information with the stack master following startup. ready (3) - the stack member is fully synchronized with the current master and is ready to take over immediately. syncError (4) - state information on the stack member is not correctly synchronized with the current stack master. For a stack member to take over as stack master with the least possible network disruption, it must have the 'ready (3)' status.