fsApIfInDiscards — FS.COM official Documentation Hub native MIB packages, FS.COM MIB copies (LibreNMS/Observium Community)
The number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of ifCounterDiscontinuityTime.