If ipslaEthernetGrpReactThresholdType value is 'xOfy', this
object specifies the 'x' value.
If ipslaEthernetGrpReactThresholdType value is 'consecutive',
this object specifies the number of consecutive occurrences
that needs threshold violation before setting
rttMonReactOccurred as 'true'.
If ipslaEthernetGrpReactThresholdType value is 'average',
this object specifies the number of samples that needs be
considered for calculating average.
This object has no meaning if ipslaEthernetGrpReactThresholdType
has value of 'never' and 'immediate'.