H3C S5120-EI series Configuration Manual

Also see for S5120-EI Series: Configuration guide Installation manual Configuration guide Configuration guide Operation manual

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H3C S5120-EI series Configuration Manual Manual pdf 57 page image

47• By setting the minimum guaranteed bandwidth, you can make sure that each WFQ queue isassured of certain bandwidth.• The assignable bandwidth is allocated based on the weight of each queue (assignable bandwidth= total bandwidth – the sum of minimum guaranteed bandwidth of each queue).For example, assume the total bandwidth of a port is 10 Mbps, and the port has eight queues, withweights as 1, 1, 1, 1, 3, 3, 5, and 5 and the minimum guaranteed bandwidth as 128 kbps for eachqueue.• The assignable bandwidth = 10 Mbps – 128 kbps x 8 = 9 Mbps.• The total assignable bandwidth quota is the sum of the weights of all queues, 1 + 1 + 1 + 1 + 3 +3+ 5 + 5 = 20.• The bandwidth percentage assigned to each queue is weight of the flow/total assignablebandwidth quota. The bandwidth percentages for the queues are 1/20, 1/20, 1/20, 1/20, 3/20,3/20, 5/20, and 5/20, respectively.• The bandwidth assigned to a queue = the minimum guaranteed bandwidth + the bandwidthallocated to the queue from the assignable bandwidth.SP+WRR queuingYou can assign some queues on a port to the SP scheduling group and the others to the WRR schedulinggroup (group 1) to implement SP + WRR queue scheduling. The switch schedules packets in the SPscheduling group preferentially, and when the SP scheduling group is empty, schedules the packets in theWRR scheduling group. Queues in the SP scheduling group are scheduled with the SP queue schedulingalgorithm. Queues in the WRR scheduling group are scheduled with WRR.SP+WFQ queuingSP+WFQ queuing is similar to SP+WRR queuing. You can assign some queues on a port to the SPscheduling group and the others to the WFQ scheduling group to implement SP + WFQ queuescheduling. The switch schedules packets of queues in the WFQ group based on their minimumguaranteed bandwidth settings, then uses SP queuing to schedule the queues in the SP scheduling group,and at last uses WFQ to schedule the queues in the WFQ scheduling group in a round robin fashionaccording to their weightsConfiguring SP queuingConfiguration procedureTo configure SP queuing:Step Command Remarks1. Enter system view. system-view N/A2. Enter interface view orport group view.• Enter interface view:interface interface-typeinterface-number• Enter port group view:port-group manualport-group-nameUse either command.Settings in interface view take effect onthe current interface. Settings in portgroup view take effect on all ports in theport group.