Exactly as described, this sets the IP DSCP value stamped onto this profile's generated packets, applicable when the PDU type includes an IP header. This is what lets a benchmark test actually exercise a network's DSCP-based QoS classification and policing behavior, like the very lookups counted by cienaCesExtAclEntryBadDscp on an ACL-capable device elsewhere in the network, rather than only measuring raw throughput independent of traffic class. For example, setting this to DSCP 46, Expedited Forwarding, would let an operator confirm a path actually prioritizes EF-marked test traffic ahead of best-effort traffic under congestion, rather than treating all IP traffic identically.