White Papers

Table 2. Default Mapping (continued)
DSCP/CP hex
Range (XXX)
DSCP Definition Traditional IP
Precedence
MXL Switch
Internal Queue
ID
DSCP/CP
Decimal
001XXX AF1 Priority 0 0–15
000XXX BE (Best Effort) Best Effort 0 0–15
wred
Designate the WRED profile to yellow or green traffic.
Syntax
wred [[{yellow | green} profile-name] ecn]
To remove the WRED drop precedence, use the no wred {yellow | green} [profile-name]
command.
Parameters
yellow | green Enter the keyword yellow for yellow traffic. A DSCP value of xxx110 and xxx101
maps to yellow.
Enter the keyword green for green traffic. A DSCP value of xxx0xx maps to
green.
profile-name
Enter your WRED profile name in character format (16 character maximum). Or use
one of the five pre-defined WRED profile names.
Pre-defined Profiles: wred_drop, wred-ge_y, wred_ge_g, wred_teng_y,
wred_teng_.
ecn When you configure wred ecn <cr> command, instead of droppping the packets
exponentially, Explicit Congestion Notification (ECN) marking is made on the
packets.
Defaults none
Command Modes CONFIGURATION (conf-qos-policy-out)
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the M I/O Aggregator.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
To assign drop precedence to green or yellow traffic, use this command. If there is no honoring enabled
on the input, all the traffic defaults to green drop precedence.
Related
Commands
wred-profile — creates a WRED profile and name that profile.
trust — defines the dynamic classification to trust DSCP.
wred ecn
To indicate network congestion, rather than dropping packets, use explicit congestion notification (ECN).
Syntax
wred ecn
To stop marking packets, use the no wred ecn command.
Defaults none
Quality of Service (QoS) 967