Selects if and how the classified DSCP is based on the classified CoS and DPL for IPv4 and IPv6 packets on ingress. If a packet is selected for being classified to a new DSCP, the classification in based on the classified CoS mapped to a new DSCP value through the qosCosToDscpTable. If the classified DPL is 1, the new DSCP value is taken from the DscpDp1 entry, otherwise it is taken from the Dscp entry. Valid values are: 'none' : Always classify to the DSCP value in the received packet and ignore the classified CoS and DPL. 'zero' : If the DSCP value in the received packet is 0, then classify to a new DSCP value based on the classified CoS and DPL. 'selected' : If the DSCP value in the received packet is enabled in qosDscpTable.Classify, then classify to a new DSCP value based on the classified CoS and DPL. 'all' : Always classify to a new DSCP value based on the classified CoS and DPL.