Users Guide

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 denitions and indicates to which queues the Dell Networking OS maps DSCP values. When
you congure 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 59. Default DSCP to Queue Mapping
DSCP/CP hex range
(XXX)xxx
DSCP Denition 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 Eort) Best Eort 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 species the queue to which the classied trac is sent based on the dot1p value.
Quality of Service (QoS)
673