This object indicates the DSCP value of the corresponding
traffic flow.
If version 4 of the IP carries the traffic flow, then the value
of this column corresponds to the DSCP part of 'Type of
Service' field of the IP header contained by packets in the
traffic flow.
If version 6 of the IP carries the traffic flow, then the value
of this column corresponds to DSCP part of the 'Traffic Class'
field of the IP header contained by packets in the traffic
flow.