This object contains an appropriate value to be used for pwIndex when creating entries in the pwTable. The value 0 indicates that no unassigned entries are available. To obtain the value of pwIndex for a new entry in the pwTable, the manager issues a management protocol retrieval operation. The agent will determine through its local policy when this index value will be made available for reuse.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)