Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 1352

NOS(config-wred)# random-detect color red minimum-threshold 100 maximum-threshold 500 drop-probability 100 NOS(config-wred)# exit NOS(config)# class-map type queuing cq NOS(config-cmap-queuing)# match queue 5 NOS(config-cmap-queuing)# exit NOS(config)# policy-map type queuing pq NOS(config-pmap-queuing)# class cq NOS(config-pmap-c-que)# random-detect w1 NOS(config-pmap-c-que)# end NOS# configure terminal NOS(config)# interface range ethernet 1/1/1,1/1/2,1/1/3 NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# flowcontrol receive off NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# priority-flow-control mode on NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# ets mode on NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# service-policy input type network-qos policy5 NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# service-policy output type queuing pq NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# trust-map dot1p t1 NOS(conf-range-eth1/1/1,1/1/2,1/1/3)# end Enable DCBx - ToR device OS10# configure terminal OS10(config)# dcbx enable Buffer statistics tracking OS10 offers the Buffer Statistics Tracking (BST) feature to observe buffer usage across the switch without any impact to performance. This feature maintains separate sets of counters for buffer usage accounting: ● Ingress priority-group ● Ingress service-pool ● Ingress shared-headroom-pool ● Egress queue ● Egress service-pool You can obtain a snapshot of the buffer statistics for the different buffer objects, such as a snapshot of all ingress prioritygroups associated to a port, all egress unicast queues bound to a port, and so on. You can enable BST at the global level. OS10 tracks buffer utilization and provides the maximum peak statistics value over a period of time and the current value of the monitored BST counter. Use the buffer-statistics-tracking command in SYSTEM-QOS mode to enable BST: OS10# configure terminal OS10(config)# configure system-qos OS10(config-sys-qos)# buffer-statistics-tracking Clear the counter You can choose to reset the peak buffer utilization value and determine a new peak buffer utilization value. Use the clear qos statistics type buffer-statistics-tracking command to clear the tracked value and to refresh this counter. BST tracks peak buffer utilization over a period of time. At any given point in time, the peak buffer usage from the past is displayed. For example, if you enable BST at time T0 and use the show command to view the peak buffer utilization value at time T1, the peak usage between T0 and T1 is displayed. If you view the peak buffer utilization again at time T2, the peak usage between T0 and T2 is displayed. However, if you clear the counter using the clear qos statistics type buffer-statisticstracking command at time T3 and view the peak buffer utilization at time T4, the peak usage between T3 and T4 is displayed. NOTE: When BST is enabled, if you make any configuration changes that affect the priority group or priority mapping configuration, such as removal of class map, addition of class map to policy map (nqos), and so on, be sure to clear the buffer statistics using the clear qos statistics type buffer-statistics-tracking command to view the actual peak buffer utilization for the current configuration. Advantages of BST include: 1352 Quality of service