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 errors,
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 determine
the source of the discards. Discard reason codes (found in IBM z/OS
Communications Server: IP and SNA Codes) may be used to filter
the trace data to show only the packets pertaining to issues discovered
in the IP statistics and interface investigation. When the offending
interface or application or both have been identified, see the
IBM z/OS Communications Server: IP Diagnosis Guide to take corrective action.
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