TWAMP Light suggests that if the Session Reflector does not have the knowledge of the session state the Reflector has to copy the received sequence number into the Sequence Number field of the reflected TWAMP Test packet. This option is used if the Session Reflector is associated with a TwampServer which has f3TwampServerControlEnabled to true. If this is set to FALSE, the Session Reflector shall use its sequence number which is not reset until it rolls over. But there is an option for user to clear the sequence number.