  InSight

# Utilization

  On this page, the upper graph displays the PVC’s throughput history.
  The x-axis represents the polls labeled by index.
  The y-axis displays the CIR utilization percent. Inbound and outbound utilization values for each poll interval are plotted. CIR values display as horizontal lines if they fall within the range of plotted data points.
  New data points are added to the graph after each poll cycle. Once the graph is full, the oldest data points are replaced by new data points.
  These values are calculated as follows:
  Inbound Utilization = RxByteCnt / (Poll Interval * (Reported CIR / 8))
  Outbound Utilization =TxByteCnt / (Poll Interval * (Reported CIR / 8))
  Poll Interval is the delta of the SysTime value between polls.
  The lower graph displays the DLCI throughput analysis. Information is obtained from the variables in the cumulative CIR percent table in the MIB.
  The list box at the center of the window enables you to select one of three types of view modes:
  Display Last Poll Values -- displays the absolute values since the statistics were last cleared on the device.
  Display Session Values -- displays the total counts since InSight was launched or the statistics were reset.
  Display History Values -- displays the delta values from the last poll.