The two objects hpnicfDot3OamErrSymPeriodWindowHi and
hpnicfDot3OamErrSymPeriodWindowLo together form an unsigned 64-bit
integer representing the number of symbols over which this
threshold event is defined. This is defined as
hpnicfDot3OamErrSymPeriodWindow = ((2^32)*hpnicfDot3OamErrSymPeriodWindowHi)
+ hpnicfDot3OamErrSymPeriodWindowLo
If hpnicfDot3OamErrSymPeriodThreshold symbol errors occur within a
window of hpnicfDot3OamErrSymPeriodWindow symbols, an Event
Notification OAMPDU should be generated with an Errored Symbol
Period Event TLV indicating the threshold has been crossed in
this window.