Users Guide

Create Policy Maps
There are two types of policy maps: input and output.
Creating Input Policy Maps
There are two types of input policy-maps: Layer 3 and Layer 2.
1. Create a Layer 3 input policy map.
CONFIGURATION mode
policy-map-input
Create a Layer 2 input policy map by specifying the keyword layer2 with the policy-map-input command.
2. After you create an input policy map, do one or more of the following:
Applying a Class-Map or Input QoS Policy to a Queue
Applying an Input QoS Policy to an Input Policy Map
Honoring DSCP Values on Ingress Packets
Honoring dot1p Values on Ingress Packets
3. Apply the input policy map to an interface.
Applying a Class-Map or Input QoS Policy to a Queue
To apply a class-map or input QoS policy to a queue, use the following command.
● Assign an input QoS policy to a queue.
POLICY-MAP-IN mode
service-queue
Applying an Input QoS Policy to an Input Policy Map
To apply an input QoS policy to an input policy map, use the following command.
● Apply an input QoS policy to an input policy map.
POLICY-MAP-IN mode
policy-service-queue <number> qos-polcy
Honoring DSCP Values on Ingress Packets
Dell EMC Networking OS provides the ability to honor DSCP values on ingress packets using Trust DSCP feature.
The following table lists the standard DSCP definitions and indicates to which queues Dell EMC Networking OS maps DSCP
values. When you configure trust DSCP, the matched packets and matched bytes counters are not incremented in the show
qos statistics.
Table 82. Default DSCP to Queue Mapping
DSCP/CP
hex range
(XXX)xxx
DSCP Definition Traditional IP
Precedence
Internal
Queue ID
Internal
Queue ID
DSCP/CP
decimal (4–
queue)
DSCP/CP decimal
(8–queue)
111XXX Network Control 3 7 48–63 53–63
110XXX Internetwork
Control
3 6 48–63 53–63
101XXX EF (Expedited
Forwarding)
CRITIC/ECP 2 5 32–47 16–23
698 Quality of Service (QoS)