Differentiated services or DiffServ is a mechanism for classifying network traffic and providing quality of service on IP networks. DiffServ uses dedicated fields in the IP header for packet classification purposes. By marking outgoing packets using a Differentiated Services Code Point (DSCP) the network can prioritize accordingly.

The DSCP value on outgoing packets is controlled by the following channel argument:

• GRPC_ARG_DSCP
  • This channel argument accepts integer values 0 to 63. See dscp-registry for details.
  • Default value is to use system default, i.e. not set.
  • Only apply to POSIX systems.