| # Quality of Service (QoS) using Differentiated services |
| |
| 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](https://www.iana.org/assignments/dscp-registry/dscp-registry.xhtml) for details. |
| * Default value is to use system default, i.e. not set. |
| * Only apply to POSIX systems. |
