Command Line Reference Guide

Quality of Service (QoS) | 1223
Table 48-8. Pre-defined WRED Profile Threshold Values
Related
Commands
trust
c e s
Specify dynamic classification (DSCP) or dot1p to trust.
Syntax
trust {diffserv [fallback]| dot1p [fallback]| ipv6-diffserv}
Parameters
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.
Pre-defined WRED Profile Name Minimum Threshold Maximum Threshold
wred_drop 0 0
wred_ge_y 1024 2048
wred_ge_g 2048 4096
wred_teng_y 4096 8192
wred_teng_g 8192 16384
wred-profile Create a WRED profile.
diffserv Enter the keyword diffserv to specify trust of DSCP markings.
dot1p Enter the keyword dot1p to specify trust dot1p configuration.
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