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

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