Input Discard Percentage is the percentage of IP segments that this TCP/IP address space received from the network that were undeliverable and discarded during the most recent sampling interval. Input discards are datagrams that were discarded, including no route found errors, unknown or unsupported protocol errors, truncation errors, invalid address, and reassembly failures.
Excessive discards waste network resources. Analyze the errors reported in the IP Statistics, Interfaces and OSA workspaces to further isolate the source of the problem.
A trace might be needed to isolate the source of the discards. Discard reason codes (found in IBM(R) z/OS(R) Communications Server: IP and SNA Codes) may be used to filter the trace data to only show packets pertaining to issues discovered in the IP statistics and interface investigation. When the offending interface or application or both has been identified, see the IBM(R) z/OS(R) Communications Server: IP Diagnosis Guide to take corrective action.
Formula: Input Discard Percentage >= 3