A HighDiscardRate fault results in a PerformanceException for the affected system or VLAN. IP Performance Manager detects a HighDiscardRate fault when one of the following conditions occurs:
The percentage of discarded input packets is greater than the DiscardThreshold. The input packet discard percentage is derived by dividing the rate of input packets discarded by the rate of packets received.
The percentage of discarded output packets is greater than the DiscardThreshold. The output packet discard percentage is derived by dividing the rate of output packets discarded by the rate of packets sent.
For either condition, the input or output packet queued rate must be greater than the minimum packet rate.
The DiscardThreshold is contained in both the Generic Interface/Port Performance setting and the Ethernet Interface/Port Performance setting. Chapter 7, "Customizing Polled Data Thresholds," in the VMware Smart Assurance IP Management Suite Configuration Guide describes these settings.