The value of the object tmnxOspfReferenceBandwidthU64Lo specifies the lower 32 bit of the reference bandwidth that needs to be used to calculate the cost metric. This value should always be set along with tmnxOspfReferenceBandwidthU64Hi, otherwise an 'inconsistentValue' error is returned. The cost metric is calculated by dividing the value of the reference bandwidth by the bandwidth of the interface. The default value of 100,000,000 Kbps or 100 Gps provides a 10-Mbs link with a cost of 10000, a 100-Mbs link with a cost of 1000, a 1-Gbs link with a cost of 100 and 10-Gbs link with a cost of 10. To override this default cost on a particular interface, set tmnxOspfIfCfgMetric for that interface.