Command Line Reference Guide

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FTOS#
trust
Specify dynamic classification (DSCP) or dot1p to trust.
S5000
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 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
Version 9.0(1.3) Introduced on the S5000.
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
default mapping table is shown below:
Table 11. Default Mapping for DSCP Trust
DSCP/CP hex
Range (XXX)
DSCP Definition 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
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