Reference Guide

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-aggregate
Honoring DSCP Values on Ingress Packets
FTOS provides the ability to honor DSCP values on ingress packets using Trust DSCP feature.
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The following table lists the standard DSCP definitions and indicates to which queues FTOS maps DSCP values. When
you configure trust DSCP, the matched packets and matched bytes counters are not incremented in the show qos
statistics.
Table 59. Default DSCP to Queue Mapping
DSCP/CP hex range
(XXX)xxx
DSCP Definition Traditional IP
Precedence
Internal Queue ID DSCP/CP decimal
111XXX Network Control 3 48–63
110XXX Internetwork Control 3 48–63
101XXX EF (Expedited
Forwarding)
CRITIC/ECP 2 32–47
100XXX AF4 (Assured
Forwarding)
Flash Override 2 32–47
011XXX AF3 Flash 1 16–31
010XXX AF2 Immediate 1 16–31
001XXX AF1 Priority 0 0–15
000XXX BE (Best Effort) Best Effort 0 0–15
•
Enable the trust DSCP feature.
POLICY-MAP-IN mode
trust diffserv
651