etsysSrvcLvlNetMeasureL3PacketSize 1.3.6.1.4.1.5624.1.2.39.1.4.1.1.21

Specifies the size of the packets counted at the IP network layer in regards to the TypeP definition. Example: For a TypeP 'ip ipip4' the L3 size will be the size of the packet at ipip4 level.