This object provides a test-and-increment value indicating the next available ifIndex a management station should use when creating a new interface row in the ifTable via the Xedia rowStatus extension. A management application first reads this value, then writes that same value back to claim it before actually creating the interface entry with that ifIndex. For example, reading xifNextIndex returns 32, and successfully setting xifNextIndex back to 32 reserves that ifIndex value for the management station's subsequent interface-creation set operation.