MIB: IF-MIB
For packet-oriented interfaces - the number of outbound packets that contained errors preventing them from being deliverable to a higher-layer protocol.
For character-oriented or fixed-length interfaces - the number of outbound transmission units that contained errors preventing them from being deliverable to a higher-layer protocol.
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`.