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Dell Configuration Guide for the S4048–ON System 9.14.2.5

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Sample configuration to mark non-ecn packets as “yellow” with single traffic class

Consider the use case where the packet with DSCP value “40” need to be enqueued in queue#2 and packets 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_50
 seq 5 permit any dscp 50
!
ip access-list standard dscp_40
 seq 5 permit any dscp 40
!
ip access-list standard dscp_50_non_ecn
 seq 5 permit any dscp 50 ecn 0

!
ip access-list standard dscp_40_non_ecn
 seq 5 permit any dscp 40 ecn 0
!
class-map match-any class_dscp_40
 match ip access-group dscp_40_non_ecn set-color yellow
 match ip access-group dscp_40
!
class-map match-any class_dscp_50
 match ip access-group dscp_50_non_ecn set-color yellow
 match ip access-group dscp_50
!
policy-map-input pmap_dscp_40_50
 service-queue 2 class-map class_dscp_40
 service-queue 3 class-map class_dscp_50

Approach with explicit ECN match qualifiers for ECN packets:

!
ip access-list standard dscp_50_ecn
 seq 5 permit any dscp 50 ecn 1
 seq 10 permit any dscp 50 ecn 2
 seq 15 permit any dscp 50 ecn 3

!
ip access-list standard dscp_40_ecn
 seq 5 permit any dscp 40 ecn 1
 seq 10 permit any dscp 40 ecn 2
 seq 15 permit any dscp 40 ecn 3

!
ip access-list standard dscp_50_non_ecn
 seq 5 permit any dscp 50 ecn 0

!
ip access-list standard dscp_40_non_ecn
 seq 5 permit any dscp 40 ecn 0
!
class-map match-any class_dscp_40
 match ip access-group dscp_40_non_ecn set-color yellow
 match ip access-group dscp_40_ecn
!
class-map match-any class_dscp_50
 match ip access-group dscp_50_non_ecn set-color yellow
 match ip access-group dscp_50_ecn
!
policy-map-input pmap_dscp_40_50
 service-queue 2 class-map class_dscp_40
 service-queue 3 class-map class_dscp_50

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