The value of the object tIPv6FilterParamsExtMxPktLenVal1 specifies the value1 to be compared to total length of the packet including header. The way how the value of this object is used depends on the value of the object tIPv6FilterParamsExtMxPktLenOper. The value of this object can be set to a non-default value only if the value of the object tIPv6FilterParamsExtMxPktLenOper is other than 'none (0)'. If the value of tIPv6FilterParamsExtMxPktLenOper is 'range (2)' then the value of this object must be less than the value of tIPv6FilterParamsExtMxPktLenVal2. If the value of tIPv6FilterParamsExtMxPktLenOper is 'lt (3)' then the value of this object can be set in range 41..65535. If the value of tIPv6FilterParamsExtMxPktLenOper is 'gt (4)' then the value of this object can be set in range 40..65574. If both the values of the objects tIPv6FilterParamsExtMxPktLenOper and tIPv6FilterParamsExtMxPktLenVal1 need to be changed then it must be done in the same SET SNMP request.