Reference Guide

1222 | Quality of Service (QoS)
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Defaults
No default behavior or values
Command Modes
CONFIGURATION (conf-policy-map-in)
Command
History
Usage
Information
When trust is configured, matched bytes/packets counters are not incremented in the show qos
statistics
command.
The trust diffserv feature is not supported on E-Series ExaScale when an IPv6 microcode is enabled.
Dynamic mapping honors packets marked according to the standard definitions of DSCP. The default
mapping table is detailed in the following table.
Table 47-9. Standard Default DSCP Mapping Table
fallback Enter this keyword to classify packets according to their DSCP value as a
secondary option in case no match occurs against the configured class maps.
ipv6-diffserv
On E-Series only, enter the keyword ipv6-diffserv to specify trust configuration of
IPv6 DSCP.
Version 8.3.1.0
fallback available on the E-Series.
Version 8.2.1.0
dot1p available on the C-Series and S-Series.
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
Version 7.4.1.0 Expanded to add support for dot1p and IPv6 DSCP
pre-Version 6.1.1.1 Introduced on E-Series
DSCP/CP
hex range
(XXX)
DSCP Definition Traditional IP Precedence E-Series
Internal Queue
ID
C-Series and
S-Series Internal
Queue ID
DSCP/CP
decimal
111XXX Network Control 7 3
48–63
110XXX Internetwork Control 6 3
101XXX EF (Expedited
Forwarding)
CRITIC/ECP 5 2
32–47
100XXX AF4 (Assured
Forwarding)
Flash Override 4 2
011XXX AF3 Flash 3 1
16–31
010XXX AF2 Immediate 2 1
001XXX AF1 Priority 1 0
0–15
000XXX BE (Best Effort) Best Effort 0 0