Switch DSCP to CoS Mappings Configuration

Dashboard Location: Switching > Configure > Switch Settings > Quality of Service

Switch DSCP to CoS mappings configuration in Meraki networks provides administrators with the capability to implement comprehensive Quality of Service (QoS) traffic classification, enabling precise mapping between Layer 3 DSCP (Differentiated Services Code Point) values and Layer 2 CoS (Class of Service) priorities. This functionality supports traffic prioritization, bandwidth management, application-specific QoS policies, real-time traffic optimization, and end-to-end service level assurance. DSCP to CoS mapping is essential for mixed-media environments, VoIP deployments, video conferencing systems, and enterprise applications requiring consistent network performance across Layer 2 and Layer 3 boundaries.

Example-1: The example below demonstrates switch DSCP to CoS mappings configuration .

This configuration manages Quality of Service traffic classification by mapping Differentiated Services Code Point (DSCP) values to Class of Service (CoS) priority levels. The example includes custom mapping definitions for traffic prioritization and QoS policy implementation.

This configuration establishes Layer 3 to Layer 2 QoS translation using “dscp_to_cos_mappings” arrays containing mapping definitions with “cos” values (0-7) for Layer 2 priority assignment, “dscp” values (0-63) for Layer 3 differentiated services identification, and “title” descriptors for administrative classification. Each mapping entry translates incoming DSCP markings to appropriate CoS levels, enabling consistent QoS treatment across Layer 2/3 boundaries, specifically:

meraki:
  domains:
    - name: !env domain
      administrator:
        name: !env org_admin
      organizations:
        - name: !env org
          networks:
            - name: !env network_name
              product_types:
                - appliance
                - switch
                - wireless
                - camera
                - sensor
                - cellularGateway
              switch:
                dscp_to_cos_mappings:
                  - cos: 0
                    dscp: 0
                    title: default
                  - cos: 0
                    dscp: 10
                    title: AF11
                  - cos: 1
                    dscp: 18
                    title: AF21
                  - cos: 2
                    dscp: 26
                    title: AF31
                  - cos: 3
                    dscp: 34
                    title: AF41
                  - cos: 4
                    dscp: 46
                    title: EF voice