Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 557

You can override the default mapping by creating QoS map. Configure user-defined QoS map 1 Create a QoS map OS10(config)# qos-map traffic-class tc-q-map 2 Define the set of traffic class values mapped to a queue OS10(config-qos-map)# queue 3 qos-group 0-3 3 Verify the map entries. OS10# show qos maps type tc-queue Traffic-Class to Queue Map: tc-q-map Queue Traffic-Class 3 0-3 4 Apply the map on a specific interface or on system-qos (global) level. • Interface level OS10(conf-if-eth1/1/1)# qos-map traffic-class tc-q-map • System-qos level OS10(config-sys-qos)# qos-map traffic-class tc-q-map Choose all traffic classified for a queue 1 Create a class-map of type queuing to match queue 5 OS10(config)# class-map type queuing q5 2 Define the queue to match OS10(config-cmap-queuing)# match queue 5 Policing traffic Use policing to limit the rate of ingress traffic flow. The flow can be all the ingress traffic on a port or a particular flow assigned with a traffic class ID. In addition, you can use policing to color the traffic. • When traffic arrives at a rate less than the committed rate, the color is green. • When traffic propagates at an average rate greater than or equal to the committed rate and less than peak-rate, the color is yellow. • When the traffic rate is above the configured peak-rate, the traffic is dropped to guarantee a bandwidth limit for an ingress traffic flow. Peak rate is the maximum rate for traffic arriving or leaving an interface under normal traffic conditions. Peak burst size indicates the maximum size of unused peak bandwidth that is aggregated. This aggregated bandwidth enables brief durations of burst traffic that exceeds the peak rate. Configure Interface rate policing 1 Create a QoS type empty class-map to match all the traffic OS10(config)# class-map cmap-all-traffic 2 Create a QoS type policy-map to define a policer OS10(config)# policy-map interface-policer OS10(config-pmap-qos)# class cmap-all-traffic OS10(config-pmap-c-qos)#police cir 4000 pir 6000 Configure flow rate policing Quality of service 557