Reference Guide

Quality of Service (QoS) | 675
Table 37-4. Default DSCP to Queue Mapping
Honoring dot1p values on ingress packets
FTOS provides the ability to honor dot1p values on ingress packets with the Trust dot1p feature. Enable
Trust dot1p using the
trust dot1pcommand from POLICY-MAP-IN mode. Table 37-5 specifies the queue
to which the classified traffic is sent based on the dot1p value.
The dot1p value is also honored for frames on the default VLAN; refer to Priority-tagged Frames on the
Default VLAN.
DSCP/CP
hex range
(XXX)
DSCP Definition
Traditional IP
Precedence
Internal
Queue ID
S-Series
Internal
Queue ID
DSCP/CP
decimal
(4 - Queue)
DSCP/CP
decimal
(8 - Queue)
111XXX Network Control 7 3
48–63
56-63
110XXX Internetwork Control 6 3
101XXX EF (Expedited
Forwarding)
CRITIC/ECP 5 2
32–47
16-23
100XXX AF4 (Assured
Forwarding)
Flash Override 4 2
011XXX AF3 Flash 3 1
16–31 8-15
010XXX AF2 Immediate 2 1
001XXX AF1 Priority 1 0
0–15 0-7
000XXX BE (Best Effort) Best Effort 0 0
Table 37-5. Default dot1p to Queue Mapping
dot1p Queue ID
S-Series
Queue ID
021
100
210
331
442
552
663
773