57153908_Net_SNMP__Description
[Name] 25 ipSystemStatsOutDiscards [Type] COUNTER [Access] ReadOnly [Description] 
The number of output IP datagrams for which no problem was encountered to prevent their transmission to their destination, but were discarded (e.g., for lack of buffer space). Note that this counter would include datagrams counted in ipSystemStatsOutForwDatagrams if any such datagrams met this (discretionary) discard criterion. 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 ipSystemStatsDiscontinuityTime.
Net-SNMP
Description