• URGYou can now use the ‘ecn’ match qualifier along with the above TCP flag for classification.The following combination of match qualifiers is acceptable to be configured for the Dell Networking OS software through L3 ACLcommand:• Classification based on DSCP only• Classification based on ECN only• Classification based on ECN and DSCP concurrentlyYou can now use the set-color yellow keyword with the match ip access-group command to mark the color of the traffic as ‘yellow’would be added in the ‘match ip’ sequence of the class-map configuration.By default, all packets are considered as ‘green’ (without the rate-policer and trust-diffserve configuration) and hence support wouldbe provided to mark the packets as ‘yellow’ alone will be provided.By default Dell Networking OS drops all the ‘RED’ or ‘violate’ packets.The following combination of marking actions to be specified match sequence of the class-map command:• set a new DSCP for the packet• set the packet color as ‘yellow’• set the packet color as ‘yellow’ and set a new DSCP for the packetThis marking action to set the color of the packet is allowed only on the ‘match-any’ logical operator of the class-map.This marking-action can be configured for all of the below L3 match sequence types:• match ip access-group• match ip dscp• match ip precedence• match ip vlanSample configuration to mark non-ecn packets as “yellow” with single traffic classConsider the use case where the packet with DSCP value “40” need to be enqueued in queue#2 and packets with DSCP value as50 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_40600 Quality of Service (QoS)
