match ip access-group dscp_40_ecn!class-map match-any class_dscp_50match ip access-group dscp_50_non_ecn set-color yellowmatch ip access-group dscp_50_ecn!policy-map-input pmap_dscp_40_50service-queue 2 class-map class_dscp_40service-queue 3 class-map class_dscp_50Applying Layer 2 Match Criteria on a Layer 3 InterfaceTo process Layer 3 packets that contain a dot1p (IEEE 802.1p) VLAN Layer 2 header, configure VLAN tagson a Layer 3 port interface which is configured with an IP address but has no VLAN associated with it. Youcan also configure a VLAN sub-interface on the port interface and apply a policy map that classifiespackets using the dot1p VLAN ID.To apply an input policy map with Layer 2 match criteria to a Layer 3 port interface, use the service-policy input policy-name layer 2 command in Interface configuration mode.To apply a Layer 2 policy on a Layer 3 interface:1. Configure an interface with an IP address or a VLAN sub-interfaceCONFIGURATION modeDell(conf)# interface fo 1/4INTERFACE modeDell(conf-if-fo-1/4)# ip address 90.1.1.1/162. Configure a Layer 2 QoS policy with Layer 2 (Dot1p or source MAC-based) match criteria.CONFIGURATION modeDell(conf)# policy-map-input l2p layer23. Apply the Layer 2 policy on a Layer 3 interface.INTERFACE modeDell(conf-if-fo-1/4)# service-policy input l2p layer2Applying DSCP and VLAN Match Criteria on a ServiceQueueYou can configure Layer 3 class maps which contain both a Layer 3 Differentiated Services Code Point(DSCP) and IP VLAN IDs as match criteria to filter incoming packets on a service queue on the switch.To configure a Layer 3 class map to classify traffic according to both an IP VLAN ID and DSCP value, usethe match ip vlan vlan-id command in class-map input configuration mode. You can include theclass map in a policy map, and apply the class and policy map to a service queue using the service-queue command. In this way, the system applies the match criteria in a class map according to queuepriority (queue numbers closer to 0 have a lower priority).Quality of Service (QoS) 681
