Operation Manual – QoS-QoS ProfileH3C S3100 Series Ethernet Switches Chapter 1 QoS Configuration1-4Category Features Refer to…QoS actions directlyconfigured as required:z Priority trust modez Traffic shapingz Line ratez Burstz For informationabout priority trustmode, refer toPriority trust modez For informationabout trafficshaping, refer toTraffic Policingand TrafficShaping.z For informationabout line rate,refer to Port RateLimiting.z For informationabout the burstfunction, refer toBurst.Congestion management SP, WRR, and HQ-WRRqueue scheduling algorithmsFor introduction toSP, WRR, andHQ-WRR queueschedulingalgorithms, refer toQueue Scheduling.1.3 Introduction to QoS Features1.3.1 Traffic ClassificationTraffic here refers to service traffic; that is, all the packets passing the switch.Traffic classification means identifying packets that conform to certain characteristicsaccording to certain rules. It is the foundation for providing differentiated services.In traffic classification, the priority bit in the type of service (ToS) field in IP packetheader can be used to identify packets of different priorities. The network administratorcan also define traffic classification policies to identify packets by the combination ofsource address, destination address, MAC address, IP protocol or the port number ofan application. Normally, traffic classification is done by checking the informationcarried in packet header. Packet payload is rarely adopted for traffic classification. Theidentifying rule is unlimited in range. It can be a quintuplet consisting of source address,source port number, protocol number, destination address, and destination port number.It can also be simply a network segment.
