The number of output IPv6 datagrams for which no
problem was encountered to prevent their
transmission to their destination, but which were
discarded (e.g., for lack of buffer space). Note
that this counter would include datagrams counted
in ipv6IfStatsOutForwDatagrams if any such packets
met this (discretionary) discard criterion.
This object is obsoleted by IP-MIB::ipIfStatsOutDiscards.