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
The Dell 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 the Dell 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 command.
NOTE: Packets with DSCP value of 63 are dropped.
Table 50. 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
Honoring dot1p Values on Ingress Packets
The Dell Networking OS honors dot1p values on ingress packets with the Trust dot1p feature.
The following table specifies the queue to which the classified traffic is sent based on the dot1p value.
740 Quality of Service (QoS)