The rate of packet drops of IP version fsUrpfIfIpVersion packets due to URPF on the interface. This object is the average rate of dropping over the most recent interval of time.The rate is computed by dividing the number of packets dropped over an interval by the interval time in seconds. Each time the drop rate is computed, and at system startup, a snapshot is taken of the latest value of fsUrpfIfDrops. Subtracting from this the snapshot of fsUrpfIfDrops at the start of the current interval of time gives the number of packets dropped. The drop rate is computed every fsUrpfComputeInterval seconds. When drop rate is computed, if time since the creation of a row in fsUrpfIfMonTable is less than fsUrpfDropRateWindow, the value of fsUrpfIfDrops is divided by the time since row was created. After the row has been in existence for fsUrpfDropRateWindow, when drop rate is computed, the number of packet drops counted on the interface from interval start time to the computation time is divided by fsUrpfDropRateWindow. Changes to fsUrpfDropRateWindow are not reflected in this object until the next computation time. The rate from the most recent computation is the value fetched until the subsequent computation is performed.