Dell Force10 S4820T FTOS Command Reference Guide - Page 1218
Policy-Based QoS Commands
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www.dell.com | support.dell.com Command Modes CONFIGURATION Command History Usage Information Version 8.3.19.0 Introduced on S4820T Version 8.3.12.0 Introduced on S4810. Version 7.6.1.0 Introduced on S-Series Version 7.5.1.0 Introduced on C-Series pre-Version 6.1.1.1 Introduced on E-Series Once a unicast queue is configured as strict-priority, that particular queue, on the entire chassis, is treated as strict-priority queue. Traffic for a strict priority is scheduled before any other queues are serviced. For example, if you send 100% line rate traffic over the SP queue, it will starve all other queues on the ports on which this traffic is flowing. Policy-Based QoS Commands Policy-based traffic classification is handled with class maps. These maps classify unicast traffic into one of eight classes in E-Series and one of four classes in C-Series, S-Series, , and . FTOS enables you to match multiple class maps and specify multiple match criteria. Policy-based QoS is not supported on logical interfaces, such as port-channels, VLANS, or loopbacks. The commands are: • bandwidth-percentage • bandwidth-weight • class-map • clear qos statistics • description • match ip access-group • match ip dscp • match ip precedence • match mac access-group • match mac dot1p • match mac vlan • policy-aggregate • policy-map-input • policy-map-output • qos-policy-input • qos-policy-output • queue backplane ignore-backpressure • queue egress • queue ingress • rate-limit • rate-police 1218 | Quality of Service (QoS)