This INTEGER is the table index for a row describing a row describing the blade's own local management/service-processor card, the number SNMP uses to line up every other VPD column (serial number, part number, manufacturer ID, and so on) that belongs to this same physical unit. The MIB itself cautions that this data should be walked as a full table rather than fetched one object at a time, since a stale poll of an individual column can be inconsistent with the rest of the row. For example, an admin walks bladeManagementCardVpdIndex together with bladeManagementCardVpdSerialNumber for the same index to get a matched pair rather than data from two different blades' management cards.