Sample configuration to mark non-ecn packets as “yellow” with single trafficclassConsider the use case where the packet with DSCP value “40” need to be enqueued in queue#2 andpackets with DSCP value as 50 need to be enqueued in queue#3. And all the packets with ecn value as ‘0’must be marked as ‘yellow’.The above requirement can be achieved using either of the two approaches.The above requirement can be achieved using either of the two approaches.Approach without explicit ECN match qualifiers for ECN packets:!ip access-list standard dscp_50seq 5 permit any dscp 50!ip access-list standard dscp_40seq 5 permit any dscp 40!ip access-list standard dscp_50_non_ecnseq 5 permit any dscp 50 ecn 0!ip access-list standard dscp_40_non_ecnseq 5 permit any dscp 40 ecn 0!class-map match-any class_dscp_40match ip access-group dscp_40_non_ecn set-color yellowmatch ip access-group dscp_40!class-map match-any class_dscp_50match ip access-group dscp_50_non_ecn set-color yellowmatch ip access-group dscp_50!policy-map-input pmap_dscp_40_50service-queue 2 class-map class_dscp_40service-queue 3 class-map class_dscp_50Approach with explicit ECN match qualifiers for ECN packets:!ip access-list standard dscp_50_ecnseq 5 permit any dscp 50 ecn 1seq 10 permit any dscp 50 ecn 2seq 15 permit any dscp 50 ecn 3!ip access-list standard dscp_40_ecnseq 5 permit any dscp 40 ecn 1seq 10 permit any dscp 40 ecn 2seq 15 permit any dscp 40 ecn 3!ip access-list standard dscp_50_non_ecnseq 5 permit any dscp 50 ecn 0!ip access-list standard dscp_40_non_ecnseq 5 permit any dscp 40 ecn 0!class-map match-any class_dscp_40match ip access-group dscp_40_non_ecn set-color yellow680 Quality of Service (QoS)
