Defines the acceptable Frame Loss Ratio. The Acceptable FLR is measured in permille. Setting this to 1000 effectively disables this check.The number is used in all enabled subtests. Only delay measurement PDUs and green background traffic undergoes FLR check. If the number of looped green frames differs from the number of transmitted green frames by more than the 'Acceptable FLR', the test is considered failing, otherwise passing.If the EVC contains multiple ECEs that matches on the same VLAN ID (UNI ingress) and the EVC uses 'Tx Lookup' equal to 'VID-PCP', the NNI ingress rules count looped traffic per NNI outer tag's PCP, and therefore provide more detailed information about which ECE is failing, than if the EVC uses 'Tx Lookup' equal to 'VID', where all looped traffic arriving on NNI is counted on the same ECE. The disadvantage of the 'VID-PCP' method is that it uses more chip resources than does the 'VID' method. Valid range is from 0 to 1000 with a default of 0‰.