H3C S3100-52P Operation Manual

Also see for S3100-52P: Operation manual Operation manual Operation manual Operation manual Operation manual

Contents

Operation Manual – QoSH3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration1-7Figure 1-5 Diagram for WRRWRR queue-scheduling algorithm schedules all the queues in turn and every queuecan be assured of a certain service time. Assume there are eight priority queues on aport. WRR configures a weight value for each queue, which is w7, w6, w5, w4, w3, w2,w1, and w0. The weight value indicates the proportion of obtaining resources. On a 100M port, configure the weight value of WRR queue-scheduling algorithm to 50, 50, 30,30, 10, 10, 10, and 10 (corresponding to w7, w6, w5, w4, w3, w2, w1, and w0 in order).In this way, the queue with the lowest priority can get 5 Mbps bandwidth at least, andthe disadvantage of SP queue-scheduling that the packets in queues with lower prioritymay not get service for a long time is avoided. Another advantage of WRR queue is that:though the queues are scheduled in order, the service time for each queue is not fixed;that is to say, if a queue is empty, the next queue will be scheduled. In this way, thebandwidth resources are made full use.1.2 QoS Supported by S3100-52PTable 1-4 QoS functions supported by S3100-52P and related commandsQoS Specification Related commandPriority mappingSupport only the mappingbetween 802.1p priority andlocal queuesqoscos-local-precedence-mapPort priority Supported priority priority-levelpriority trustQueueschedulingSupport SP and WRRSupport queue schedulingconfiguration synchronizationon aggregated portsqueue-scheduler