1*cc02d7e2SAndroid Build Coastguard Worker# Quality of Service (QoS) using Differentiated services 2*cc02d7e2SAndroid Build Coastguard Worker 3*cc02d7e2SAndroid Build Coastguard WorkerDifferentiated services or DiffServ is a mechanism for classifying network traffic and providing quality of service on IP networks. 4*cc02d7e2SAndroid Build Coastguard WorkerDiffServ uses dedicated fields in the IP header for packet classification purposes. 5*cc02d7e2SAndroid Build Coastguard WorkerBy marking outgoing packets using a Differentiated Services Code Point (DSCP) the network can prioritize accordingly. 6*cc02d7e2SAndroid Build Coastguard Worker 7*cc02d7e2SAndroid Build Coastguard WorkerThe DSCP value on outgoing packets is controlled by the following channel argument: 8*cc02d7e2SAndroid Build Coastguard Worker 9*cc02d7e2SAndroid Build Coastguard Worker* **GRPC_ARG_DSCP** 10*cc02d7e2SAndroid Build Coastguard Worker * This channel argument accepts integer values 0 to 63. See [dscp-registry](https://www.iana.org/assignments/dscp-registry/dscp-registry.xhtml) for details. 11*cc02d7e2SAndroid Build Coastguard Worker * Default value is to use system default, i.e. not set. 12*cc02d7e2SAndroid Build Coastguard Worker * Only apply to POSIX systems. 13