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Dell EMC Networking OS Configuration Guide for the S5048F–ON System 9.14.2.8

Creating a Layer 3 Class Map

A Layer 3 class map differentiates ingress packets based on the DSCP value or IP precedence, and characteristics defined in an IP ACL. You can also use VLAN IDs and VRF IDs to classify the traffic using layer 3 class-maps.

You may specify more than one DSCP and IP precedence value, but only one value must match to trigger a positive match for the class map.
NOTE IPv6 and IP-any class maps cannot match on ACLs or VLANs.

Use step 1 or step 2 to start creating a Layer 3 class map.

  1. Create a match-any class map.
    CONFIGURATION mode
    class-map match-any
  2. Create a match-all class map.
    CONFIGURATION mode
    class-map match-all
  3. Specify your match criteria.
    CLASS MAP mode
    [seq sequence number] match {ip | ipv6 | ip-any}
    After you create a class-map, Dell EMC Networking OS places you in CLASS MAP mode.
    Match-any class maps allow up to five ACLs. Match-all class-maps allow only one ACL.
    NOTE Within a class-map, the match rules are installed in the sequence number order.
  4. Link the class-map to a queue.
    POLICY MAP mode
    service-queue

Example of Creating a Layer 3 Class Map

DellEMC(conf)#ip access-list standard acl1
DellEMC(config-std-nacl)#permit 20.0.0.0/8
DellEMC(config-std-nacl)#exit
DellEMC(conf)#ip access-list standard acl2
DellEMC(config-std-nacl)#permit 20.1.1.0/24 order 0
DellEMC(config-std-nacl)#exit
DellEMC(conf)#class-map match-all cmap1
DellEMC(conf-class-map)#match ip access-group acl1
DellEMC(conf-class-map)#exit
DellEMC(conf)#class-map match-all cmap2
DellEMC(conf-class-map)#match ip access-group acl2
DellEMC(conf-class-map)#exit
DellEMC(conf)#policy-map-input pmap
DellEMC(conf-policy-map-in)#service-queue 3 class-map cmap1
DellEMC(conf-policy-map-in)#service-queue 1 class-map cmap2
DellEMC(conf-policy-map-in)#exit
DellEMC(conf)#interface twentyFiveGigE 1/1
DellEMC(conf-if-tf-1/1)#service-policy input pmap

Examples of Creating a Layer 3 IPv6 Class Map

The following example matches the IPv6 traffic with a DSCP value of 40: 

DellEMC(conf)# class-map match-all test 
DellEMC(conf-class-map)# match ipv6 dscp 40

The following example matches the IPv4 and IPv6 traffic with a precedence value of 3: 

DellEMC(conf)# class-map match-any test1 
DellEMC(conf-class-map)#match ip-any precedence 3

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