UMN:CLI User ManualV81023309.3.1 How to Operate QoSQoS operation is briefly described as below.Incoming packets are classified by configured conditions, and then processed by packetcounter and rate-limiting on specific policer. After marking and remarking action, theswitch transmits those classified and processed packets via a given scheduling algorithm.Fig. 9.5 shows the simple procedure of QoS operation.Fig. 9.5 Procedure of QoS operationThe structure of Rule has 4 types of categories with different roles for QoS.• FlowDefines traffic classification criterias such as L3 source and destination IPaddress, L2 source and destination MAC address, Ethernet type, length, Class ofService (CoS), Differentiated Services Code Point (DSCP) and so on. A uniquename needs to be assigned to each flow.• ClassIncludes more than 2 flows for the efficient traffic management in the application ofrule to this set of flows. Additionally, a unique name needs to be assigned to eachclass.• PolicerDefines the packet counter and rate-limit. The policer adjusts how and what is to beclassified within transmitted packets.– packet counter calculates the classified packets for identifying a flow.– rate-limit defines which packets conform to or exceed the given rate.• PolicyConfigures the policy classifying the action(s) to be performed if the configured ruleclassification fits transmitted packet(s). It cannot only include a specified Flow, Classor Policer but also set marking/remarking according to the various parameters suchas CoS and DSCP which determine the rule action or priority of packets.– mirror transmits the classified traffic to the monitor port.– redirect transmits the classified traffic to the specified port.– permit allows traffic matching given characteristics.
