Dell Command Line Reference Guide for the S4048–ON System 9.14.2.8

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trust

Specify dynamic classification (DSCP) or dot1p to trust.

S4048–ON

Syntax
trust {diffserv [fallback]| dot1p [fallback]}
Parameters
diffserv
Enter the keyword diffserv to specify trust of DSCP markings.
dot1p
Enter the keyword dot1p to specify trust dot1p configuration.
fallback
Enter the keyword fallback to classify packets according to their DSCP or dot1p value as a secondary option in case no match occurs against the configured class maps.
Defaults
none
Command Modes
CONFIGURATION (conf-policy-map-in)
Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100-ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100-ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Introduced on the S6000-ON.
9.2(1.0)
Introduced on the Z9500.
9.0.2.0
Introduced on the S6000.
8.3.19.0
Introduced on the S4820T.
8.3.11.1
Introduced on the Z9000.
8.3.7.0
Introduced on the S4810.
8.3.1.0
Added fallback to the E-Series.
8.2.1.0
Added dot1p to the C-Series and S-Series.
7.6.1.0
Introduced on the S-Series.
7.5.1.0
Introduced on the C-Series.
7.4.1.0
Added dot1p and IPv6 DSCP .
6.1.1.1
Introduced on the E-Series.
Usage Information

When you configure trust, matched bytes/packets counters are not incremented in the show qos statistics command.

Dynamic mapping honors packets marked according to the standard definitions of DSCP. The following lists the default mapping.

Table 1. Default MappingDefault Mapping
DSCP/CP hex Range (XXX) DSCP Definition Traditional IP Precedence S6000 Internal Queue ID S-Series Internal Queue ID DSCP/CP Decimal
111XXX Network Control 7 3 48–63
110XXX Internetwork Control 6 3 48–63
101XXX EF (Expedited Forwarding) CRITIC/ECP 5 2 32–47
100XXX AF4 (Assured Forwarding) Flash Override 4 2 32–47
011XXX AF3 Flash 3 1 16–31
010XXX AF2 Immediate 2 1 16–31
001XXX AF1 Priority 1 0 0–15
000XXX BE (Best Effort) Best Effort 0 0 0–15

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