Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 963

• Apply queuing policies in the output direction on physical interfaces or in System-Qos mode. • Apply a application type policy-map in System-Qos mode. When you apply a policy on a system, the policy is effective on all the ports in the system. However, the interface-level policy takes precedence over the system-level policy. Ingress traffic classification Ingress traffic can either be data or control traffic. By default, OS10 does not classify data traffic and assigns the default traffic class ID 0 to all data traffic. OS10 implicitly classifies all control traffic such as STP, OSPF, ICMP, and so on, and forwards the traffic to control plane applications. Data traffic classification You can classify the data traffic based on ACL or trust. ACL-based classification consumes significant amount of network processor resources. Trust-based classification classifies traffic in a predefined way without using network processor resources. Trust based classification OS10 supports classification based on the 802.1p CoS field (L2) or DSCP field (L3). 802.1p CoS trust map: Trust the 802.1p CoS field to mark with a traffic-class ID and color for the CoS flow. Table 59. Default 802.1p CoS trust map CoS Traffic class ID 0 1 1 0 2 2 3 3 4 4 5 5 6 6 7 7 Color G G G G G G G G User-defined 802.1p CoS trust map You can override the default mapping by creating a dot1p trust map. All the unspecified dot1p entries map to the default traffic class ID 0. Configure user-defined 802.1p CoS trust map 1 Create a dot1p trust map. OS10(config)# trust dot1p-map dot1p-trust-map OS10(config-tmap-dot1p-map)# Quality of service 963