Concept Guide

DellEMC(conf-policy-map-in)#service-queue 1 class-map cmap2
DellEMC(conf-policy-map-in)#exit
DellEMC(conf)#interface gigabitethernet 1/1
DellEMC(conf-if-gi-1/1)#service-policy input pmap
Examples of Creating a Layer 3 IPv6 Class Map
The following example matches the IPv6 trac 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 trac with a precedence value of 3:
DellEMC(conf)# class-map match-any test1
DellEMC(conf-class-map)#match ip-any precedence 3
Creating a Layer 2 Class Map
All class maps are Layer 3 by default; however, you can create a Layer 2 class map by specifying the layer2 option with the class-map
command.
A Layer 2 class map dierentiates trac according to 802.1p value and/or VLAN and/or characteristics dened in a MAC ACL..
Use Step 1 or Step 2 to start creating a Layer 2 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 mac
After you create a class-map, Dell EMC Networking OS places you in CLASS MAP mode.
Match-any class maps allow up to ve access-lists. Match-all class-maps allow only one. You can match against only one VLAN ID.
4 Link the class-map to a queue.
POLICY MAP mode
service-queue
Determining the Order in Which ACLs are Used to Classify Trac
When you link class-maps to queues using the service-queue command, Dell EMC Networking OS matches the class-maps according
to queue priority (queue numbers closer to 0 have lower priorities).
For example, as described in the previous example, class-map cmap2 is matched against ingress packets before cmap1.
ACLs acl1 and acl2 have overlapping rules because the address range 20.1.1.0/24 is within 20.0.0.0/8. Therefore (without the keyword
order), packets within the range 20.1.1.0/24 match positive against cmap1 and are buered in queue 7, though you intended for these
packets to match positive against
cmap2 and be buered in queue 4.
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Quality of Service (QoS)