Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 576

• Queuing policies must be applied in the output direction on physical interfaces or on system-qos mode. • Application type policy-map must be applied on system-qos mode. When a policy is applied on system, the policy is effective on all the ports in the system. However, interface level policy gets precedence over system level policy. Ingress traffic classification Ingress traffic can be either data traffic 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 like 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 allows to classify traffic in a pre-defined way without using any 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 9. 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 dot1p trust map. All the unspecified dot1p entries are mapped 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)# 576 Quality of service